Drum screen for sewage treatment

Abstract

The utility model relates to the technical field of rotary screens, in particular to a rotary screen for sewage treatment, which is provided with a rack, a rotary driving device is arranged on the rack, the rotary driving device is provided with the rotary screen, the rotary screen is obliquely arranged, and the rotary driving device comprises rotary rollers arranged on two sides of the rack. The rotary roller is connected with the roller driver through the roller transmission shaft, a roller positioning groove is formed in the rotary screen, the rotary roller is arranged in the roller positioning groove, and the rotary roller, the roller transmission shaft and other components are arranged outside the rotary screen, so that the problem that sludge and other impurities block the interior of the rotary screen is effectively solved. The internal cleaning and maintenance work of the drum screen is facilitated, and the cleaning difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drum screens, in particular to a drum screen for sewage treatment. Background Art

[0002] A drum screen is a machine widely used in sorting technology, mainly used for classifying and separating materials. It has high processing precision and realizes sorting by controlling the particle size. In sewage treatment, the drum screen also plays an important role, which can effectively remove impurities such as particulate matters and suspended matters in sewage, reducing the burden on subsequent sewage treatment processes.

[0003] In the shellfish breeding and processing industry, especially in the processing of seafood such as oysters, a large amount of sewage containing sea mud, broken shells and attachments is often generated during the cleaning process. Therefore, the drum screen method can be used to treat the cleaning sewage to separate the sea mud and broken shells. For example, the utility model patent with the patent number ZL201921815169.7 and the patent name of "A drum screen for sewage treatment" discloses a drum device, which includes a drum screen, a rotating shaft and a motor. The rotating shaft is located inside the drum screen, and the motor drives the rotating shaft to rotate, thereby driving the drum screen to rotate and treating the sewage entering the drum screen.

[0004] However, in actual use, due to the large amount of hard impurities such as sludge and shellfish broken shells in the sewage, the sludge and broken shells in the sewage impact the screen at high speed, and the screen often bears huge mechanical wear. Especially at the feeding end, the continuous erosion over a long time will gradually weaken the strength of the screen, ultimately leading to screen damage. In addition, since the rotating shaft is located inside the drum screen, it is easy to cause sludge blockage and is not convenient for cleaning. Summary of the Invention

[0005] To solve the above problems, the present application provides a drum screen for sewage treatment, which is provided with a frame. A rotary drive device is arranged on the frame, and a drum screen is arranged on the rotary drive device. The drum screen is inclined. A spiral guide plate is arranged on the inner wall of the drum screen. The rotary drive device includes rotary rollers arranged on both sides of the frame. The rotary rollers include a driving rotary roller and a driven rotary roller. The driving rotary roller is connected to a roller drive through a roller transmission shaft. A roller positioning groove is arranged on the drum screen, and the rotary roller is placed in the roller positioning groove.

[0006] In one embodiment, the driving rotary roller and the driven rotary roller are arranged oppositely, and at least two pairs of the driving rotary roller and the driven rotary roller are provided. Reinforcing plates are fixedly arranged at the contact parts between the rotary rollers and the drum screen.

[0007] In one embodiment, reinforcing ribs are arranged between adjacent reinforcing plates, and the reinforcing ribs are arranged along the axial direction of the drum screen.

[0008] In one embodiment, a sludge collection box is arranged at the tail of the drum screen 3.

[0009] In one embodiment, there are three pairs of the driving rotating rollers and the driven rotating rollers.

[0010] The beneficial effects of the present utility model are as follows:

[0011] In the present application, a drum screen for sewage treatment is provided with a frame. A rotary driving device is arranged on the frame, and a drum screen is arranged on the rotary driving device. The drum screen is inclined. The rotary driving device includes rotary rollers arranged on both sides of the frame. The rotary rollers are connected to a roller driver through roller drive shafts. Roller positioning grooves are arranged on the drum screen, and the rotary rollers are placed in the roller positioning grooves. By arranging components such as the rotary rollers and the roller drive shafts outside the drum screen, the problem of blockage caused by impurities such as sludge inside the drum screen is effectively avoided, which facilitates the cleaning and maintenance work inside the drum screen and reduces the cleaning difficulty. By arranging the reinforcing plates, not only additional supporting force is provided for the rotary rollers, but also the structural strength of the drum screen is enhanced, which helps to resist the abrasion and weakening of the screen caused by the long-term scouring of impurities such as sludge and broken shells. Description of the Drawings

[0012] Figure 1 is the front view of the present utility model;

[0013] Figure 2 is the top view of the present utility model;

[0014] Figure 3 is the top view of the drum screen;

[0015] Figure 4 is the top view of the rotary driving device;

[0016] Explanation of the symbols in the drawings:

[0017] 1. Frame;

[0018] 2. Rotary driving device;

[0019] 21. Rotary roller; 211. Driving rotary roller; 212. Driven rotary roller;

[0020] 22. Roller drive shaft; 23. Roller driver;

[0021] 3. Drum screen;

[0022] 31. Roller positioning groove; 32. Reinforcing plate; 33. Reinforcing rib;

[0023] 4. Sludge collection tank. Detailed implementation manners

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer and more understandable, the following further details this application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0025] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0026] As Figure 1 、 2 、shown in Figure 3, a drum screen for sewage treatment is provided with a frame 1, a rotary drive device 2 is arranged on the frame 1, a drum screen 3 is arranged on the rotary drive device 2, the drum screen 3 is inclined, a spiral guide plate is arranged on the inner wall of the drum screen 3, the rotary drive device 2 includes rotary rollers 21 arranged on both sides of the frame 1, the rotary rollers 21 include a driving rotary roller 211 and a driven rotary roller 212, the driving rotary roller 211 is connected to a roller drive 23 through a roller transmission shaft 22, a roller positioning groove 31 is arranged on the drum screen 3, and the rotary rollers 21 are placed in the roller positioning groove 31.

[0027] Specifically, the rotating roller 21 is installed in the roller positioning groove 31 of the drum screen 3 to prevent the rotating roller 21 from falling out of the roller positioning groove 31, and it plays a role in supporting and driving the rotation of the drum screen 3. After the roller driver 23 is started, power is transmitted to the driving rotating roller 211 through the roller transmission shaft 22. The driving rotating roller 211 rotates and drives the drum screen 3 to start rotating around its axis. Sludge, broken shells and other impurities in the sewage enter the drum screen 3 along with the water flow. During the rotation of the drum screen 3, the sludge is affected by centrifugal force and gravity and moves along the inclined surface and the screen of the drum screen 3. Larger particulate matters are intercepted by the screen and roll downward along the inclined surface of the drum screen 3, and finally are discharged from the discharge end of the drum screen 3; while smaller particulate matters and liquids flow out through the pores of the screen, realizing the screening and separation of sewage. The spiral guide plate 4 on the inner wall of the drum screen 3 plays a guiding role for the materials, enabling the sludge and broken shells to move inside the drum screen 3 along a spiral path, improving the screening efficiency. In this application, components such as the rotating roller 21 and the roller transmission shaft 22 are located outside the drum screen 3, effectively avoiding the problem of blockage caused by sludge and other impurities inside the drum screen 3, facilitating the cleaning and maintenance work inside the drum screen 3, and reducing the cleaning difficulty.

[0028] As Figure 3 , 4 shown, the driving rotating roller 211 and the driven rotating roller 212 are arranged oppositely, at least two pairs of the driving rotating roller 211 and the driven rotating roller 212 are provided, and a reinforcing plate 32 is fixedly arranged at the contact part between the rotating roller 21 and the drum screen 3.

[0029] Specifically, in this embodiment, three pairs of driving rotating rollers 211 and driven rotating rollers 212 are provided, and the reinforcing plate 32 is arranged at the contact part between the rotating roller 21 and the drum screen 3, which not only provides additional support force for the rotating roller 21, but also enhances the structural strength of the drum screen 3, helping to resist the wear and weakening of the screen caused by the long-term scouring of sludge, broken shells and other impurities.

[0030] As Figure 3 shown, a reinforcing rib 33 is arranged between adjacent reinforcing plates 32, and the reinforcing rib 33 is arranged along the axial direction of the drum screen 3.

[0031] Specifically, the reinforcing rib 33 between adjacent reinforcing plates 32 further enhances the support network. The presence of the reinforcing rib 33 helps to disperse the impact force of the sludge to the entire drum screen 3, thus avoiding the risk of local stress concentration and damage. The reinforcing rib 33 is arranged along the axial direction, improving the stability and balance of the drum screen 3 during rotation, reducing the vibration and swing generated by the drum screen 3 during rotation. The combined use of the reinforcing rib 33 and the reinforcing plate 32 significantly improves the overall structural strength of the drum screen 3.

[0032] As shown Figure 1 at the tail of the drum screen 3, a sludge collection box 4 is provided.

[0033] Specifically, by providing the sludge collection box 4, the sludge and impurities intercepted during the screening process can be collected, preventing the impurities from scattering or accumulating around the drum screen. The operator only needs to regularly clean the sludge collection box 4 to carry out subsequent treatment or disposal of the collected sludge and impurities.

[0034] In a drum screen for sewage treatment of the present application, a frame 1 is provided. A rotary drive device 2 is provided on the frame 1. A drum screen 3 is provided on the rotary drive device 2. The drum screen 3 is inclined. The rotary drive device 2 includes rotary rollers 21 provided on both sides of the frame 1. The rotary rollers 21 are connected to a roller drive 23 through roller drive shafts 22. Roller positioning grooves 31 are provided on the drum screen 3. The rotary rollers 21 are placed in the roller positioning grooves 31. By arranging components such as the rotary rollers 21 and roller drive shafts 22 outside the drum screen 3, the problem of blockage caused by sludge and other impurities inside the drum screen 3 is effectively avoided, facilitating the cleaning and maintenance work inside the drum screen 3 and reducing the cleaning difficulty. By providing a reinforcing plate 32, not only an additional supporting force is provided for the rotary rollers 21, but also the structural strength of the drum screen 3 is enhanced, helping to resist the wear and weakening of the screen caused by the long-term scouring of impurities such as sludge and broken shells.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can also be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. A drum screen for sewage treatment, comprising a frame (1), a rotary drive device (2) being arranged on the frame (1), a drum screen (3) being arranged on the rotary drive device (2), the drum screen (3) being arranged at an angle, and a spiral guide plate being arranged on the inner wall of the drum screen (3), characterized in that: The rotary drive device (2) comprises rotary rollers (21) arranged on both sides of the frame (1); the rotary rollers (21) comprise an active rotary roller (211) and a driven rotary roller (212); the active rotary roller (211) is connected to a roller driver (23) via a roller transmission shaft (22); a roller positioning groove (31) is provided on the drum screen (3); and the rotary roller (21) is placed in the roller positioning groove (31).

2. A drum screen for sewage treatment according to claim 1, characterized in that: The active rotating roller (211) and the driven rotating roller (212) are arranged opposite to each other, and at least two pairs of the active rotating roller (211) and the driven rotating roller (212) are arranged. A reinforcing plate (32) is fixedly arranged at the contact portion between the rotating roller (21) and the drum screen (3).

3. A drum screen for sewage treatment according to claim 2, characterized in that: Reinforcing ribs (33) are arranged between adjacent reinforcing plates (32), and the reinforcing ribs (33) are arranged along the axial direction of the drum screen (3).

4. A drum screen for sewage treatment according to claim 1, characterized in that: A sludge collection box (4) is provided at the tail of the drum screen 3.

5. A drum screen for sewage treatment according to claim 1, characterized in that: The active rotating rollers (211) and the driven rotating rollers (212) are in three pairs.

Images