A sewage pretreatment device

Abstract

The utility model discloses a sewage pretreatment device belongs to sewage treatment equipment technical field. Including filter drum, filter screen, filter drum, filter screen are provided with two groups, and filter drum is suspended and is arranged, and filter screen is fixedly connected in filter drum bottom through screw, and two filter drums are connected with support through rotating mechanism, and the lifting plate is arranged in the fixed frame and slides up and down, and the cleaning assembly that can wash and remove the impurity of filter drum inner wall is arranged on the lifting plate, the setting of two filter drums of rotating mechanism connection of the present application can shift the position of the filter drum to be cleaned, and the risk of collision between the maintenance instrument and the sewage pipe is avoided. The electric telescopic link drives the lifting plate to drive the erasing block and the shower head to move vertically downward, and the scraping and high-pressure water washing of the filter drum inner wall are automatically completed, the cleaning process is more smooth, and the residual can be reduced.

Description

Technical Field

[0001] This utility model provides a wastewater pretreatment device, belonging to the technical field of wastewater treatment equipment. Background Technology

[0002] In the field of industrial and municipal wastewater treatment, pretreatment is crucial to ensuring the stable and efficient operation of subsequent biological or advanced treatment processes. One of the core objectives of pretreatment is to remove suspended solids carried in wastewater, such as leaves, fibers, and plastic fragments, to prevent them from clogging pumps, pipes, and subsequent process equipment. To achieve this goal, physical filtration devices such as screens and filters are widely used at the inlet, effectively separating solid impurities through interception.

[0003] Existing filtration devices often require maintenance and cleaning after a period of use. For fixed sewage pipes, their proximity to the filter inlet makes it easy for cleaning and maintenance tools to interfere with or collide with the pipe when inserted into the filter or during operation. Furthermore, removing accumulated impurities from the filter is typically cumbersome, requiring removal through top or side openings and often leaving excessive residue on the inner walls. To address these issues, a novel pretreatment device design is urgently needed. This design should ensure that cleaning tools used during filter maintenance do not interfere with or collide with the fixed sewage pipe, while facilitating the removal of impurities and minimizing residue. Utility Model Content

[0004] The technical problem this invention aims to solve is that during the maintenance of a wastewater pre-filtration device, the cleaning and maintenance equipment is prone to interference and collision with the fixed wastewater pipe, and impurities are easily left behind when removing them.

[0005] To solve the above problems, the present invention proposes the following technical solution: a sewage pretreatment device, comprising a filter cylinder and a filter screen; the filter screen is disposed inside the filter cylinder, and the filter cylinder is located at a position corresponding to the sewage pipe; a transfer box is placed below the filter cylinder, and a transfer pipe is connected to the bottom of the transfer box;

[0006] The filter cartridge is mounted on an L-shaped bracket fixed to the ground at its rear. Two sets of filter cartridges and filter screens are provided; the filter cartridges are suspended in the air, and the filter screens are fixed to the bottom of the filter cartridges with screws. Both sets of filter cartridges are connected to the bracket via a rotating mechanism. A fixed frame is mounted on the ground on the side of the bracket, with the filter cartridge furthest from the sewage pipe located within the fixed frame. A lifting plate slides vertically within the fixed frame, and the lifting plate is equipped with a cleaning component capable of rinsing and wiping away impurities from the inner wall of the filter cartridge. A waste bin for receiving wastewater and waste materials is located below the filter cartridge furthest from the sewage pipe, and the waste bin is connected to a transfer box via a connecting pipe.

[0007] As an improvement, the cleaning assembly includes a wiping block and nozzles; the wiping block, capable of wiping the inner wall of the filter cartridge downwards, is fixedly sleeved on the side wall of the lifting plate, and several nozzles, capable of spraying water to rinse the inner wall of the filter cartridge, are fixedly connected below the lifting plate.

[0008] As an improvement, the fixed frame is equipped with an electric telescopic rod, the working end of which is fixedly connected to the lifting plate.

[0009] As an improvement, a water tank containing clean water is fixedly installed on the mounting frame, and a water pump is installed on the water tank, with the water pump connected to the nozzle through a delivery pipe.

[0010] As an improvement, the rotating mechanism includes a rotating motor and a rotating rod; the rotating motor is mounted on a bracket, and the rotating rod, which is fixedly connected to the output end of the rotating motor, is also fixedly connected to two filter cylinders.

[0011] As an improvement, a detachable separation net is fixedly installed inside the waste bin, and a one-way valve is installed on the connecting pipe.

[0012] The beneficial effects of this utility model are:

[0013] 1. This application features two sets of filter cartridges connected by a rotating mechanism. While one set of filter cartridges is performing normal filtration on the sewage pipe, the other set can be rotated to a fixed frame on the side for maintenance. This layout completely separates the maintenance operation area from the fixed sewage pipe inlet, providing ample and interference-free working space for the cleaning equipment. It fundamentally avoids the risk of collision between the maintenance equipment and the sewage pipe, ensuring the safety and smoothness of the maintenance operation.

[0014] 2. The filter cartridge is suspended in the air, and the filter screen is fixed to the bottom of the filter cartridge with screws. When removing the filter screen, the filter cartridge has an open bottom structure. The electric telescopic rod drives the lifting plate, which in turn moves the wiping block and nozzle vertically downwards, automatically scraping and rinsing the inner wall of the filter cartridge with high-pressure water. This process thoroughly removes stubborn impurities and flushes them into the waste bin below. Compared to traditional methods of cleaning from the top or side of the filter structure, the cleaning process is smoother and reduces residue. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention.

[0016] Figure 2 This is a perspective view of the present invention.

[0017] Figure 3 This is a partial sectional view of the present invention.

[0018] Figure 4 This is a cross-sectional view of the waste bin of this utility model.

[0019] 1. Filter screen; 2. Filter cylinder; 3. Sewage pipe; 4. Support; 5. Rotating motor; 6. Rotating rod; 7. Electric telescopic rod; 8. Water tank; 9. Water pump; 10. Fixing frame; 11. Waste bin; 12. Transfer box; 13. Lifting plate; 14. Wiping block; 15. Nozzle; 16. Separation net; 17. Connecting pipe; 18. Transfer pipe. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] This utility model provides a wastewater pretreatment device, including a filter cylinder 2 and a filter screen 1; the filter screen 1 is disposed inside the filter cylinder 2, and the filter cylinder 2 is located at a position corresponding to the wastewater pipe 3; a transfer box 12 is placed below the filter cylinder 2, and a transfer pipe 18 is connected to the bottom of the transfer box 12 to transfer the pretreated wastewater to the next treatment device.

[0022] Reference Appendix Figure 1 , 2 The filter cylinder 2 is provided with an L-shaped bracket 4 fixedly installed on the ground. There are two sets of filter cylinder 2 and filter screen 1. The filter cylinder 2 is suspended in the air, and the filter screen 1 is fixedly connected to the bottom of the filter cylinder 2 by screws. When the filter screen 1 is removed, the lower end of the filter cylinder 2 can be opened at the same time, which is convenient for cleaning the impurities inside the filter cylinder 2.

[0023] Two sets of filter cartridges 2 are connected to the support 4 via a rotating mechanism. The rotating mechanism includes a rotating motor 5 and a rotating rod 6. The rotating motor 5 is mounted on the support 4, and the rotating rod 6, which is fixedly connected to the output end of the rotating motor 5, is also fixedly connected to both filter cartridges 2. The rotating motor 5 can move the filter cartridge 2 to be cleaned and maintained to a position away from the sewage pipe 3, avoiding interference between the cleaning equipment and the sewage pipe 3. At the same time, the arrangement of two sets of filter cartridges 2 ensures that the sewage pretreatment process will not be delayed when cleaning and maintaining one of the filter cartridges 2.

[0024] Reference Appendix Figure 2 The bracket 4 has a fixed frame 10 fixedly installed on the ground on the side, and the filter cylinder 2 away from the sewage pipe 3 is located inside the fixed frame 10; a lifting plate 13 is slidably installed inside the fixed frame 10, and an electric telescopic rod 7 is installed on the fixed frame 10, with the working end of the electric telescopic rod 7 fixedly connected to the lifting plate 13.

[0025] The lifting plate 13 is equipped with a cleaning component that can rinse and wipe away impurities on the inner wall of the filter cylinder 2. The cleaning component includes a wiping block 14 and a nozzle 15. The wiping block 14, which can wipe the inner wall of the filter cylinder 2 downwards, is fixedly sleeved on the side wall of the lifting plate 13. The wiping block 14 is an elastic structure, and the wiping block 14 is provided with bristles. The diameter of the wiping block 14 corresponds to the inner diameter of the filter cylinder 2.

[0026] Several nozzles 15, capable of spraying water to rinse the inner wall of the filter cartridge 2, are fixedly connected below the lifting plate 13. A water tank 8 containing clean water is fixedly installed on the mounting bracket 10, and a water pump 9 is installed on the water tank 8. The water pump 9 is connected to the nozzles 15 through a delivery pipe. The delivery pipe is a sufficiently long flexible hose to ensure that the nozzles 15 remain connected to the water tank 8 when the lifting plate 13 is raised or lowered.

[0027] Reference Appendix Figure 2 , 4 Below the filter cylinder 2, which is far from the sewage pipe 3, there is a waste bin 11 for receiving wastewater and waste materials. A detachable separation screen 16 is fixedly installed inside the waste bin 11, which can separate impurities and wastewater. The pore size of the separation screen 16 is smaller than that of the filter screen 1. The waste bin 11 is connected to the transfer box 12 through a connecting pipe 17, and a one-way valve is installed on the connecting pipe 17. The wastewater used to clean the inner wall of the filter cylinder 2 after the impurities are separated can enter the transfer box 12 through the connecting pipe 17 to participate in the next stage of treatment.

[0028] The principle of this utility model

[0029] Under normal filtration conditions, refer to the attached document. Figure 1 , 2The rotating motor 5 drives the rotating rod 6, causing one of the filter cartridges 2 to rotate to a position directly opposite the sewage pipe 3, receiving and filtering the incoming sewage. The filtered water passes through the filter screen into the lower transfer box 12, and then exits from the transfer pipe 18. When this filter cartridge 2 needs cleaning due to impurities, the rotating motor 5 restarts, driving both sets of filter cartridges 2 to rotate synchronously 180 degrees. This causes the saturated filter cartridge 2 to rotate into the side mounting bracket 10, while the clean, spare filter cartridge 2 rotates synchronously to the bottom of the sewage pipe 3, immediately connecting to the filtration system. The saturated filter cartridge 2 is located in the mounting bracket 10 away from the sewage pipe 3, thus avoiding interference or collision with the sewage pipe 3 when cleaning and maintaining it with cleaning equipment.

[0030] At the maintenance station, the cleaning process is automated and efficient. (See attached document for reference.) Figure 2 , 3 First, the filter screen 1 is removed, leaving the bottom of the filter cylinder 2 open. Under gravity, some impurities inside the filter cylinder 2 fall directly into the waste bin 11. The electric telescopic rod 7 is activated, driving the lifting plate 13 to descend. The wiping block 14 fixed on it moves downwards accordingly, forcefully scraping away stubborn impurities adhering to the inner wall of the filter cylinder 2. Simultaneously, the water pump 9 is activated, sending clean water from the water tank 8 to the nozzle 15 through the delivery pipe. The high-pressure water flow washes the scraped cylinder wall and flushes the scraped impurities into the waste bin 11 below. Compared with the traditional method of cleaning from the top or side of the device, this method is simpler and greatly reduces the residue of impurities. The impurities are trapped by the removable separating net 16 inside the waste bin 11, while the wastewater flows back to the transfer box 12 through the connecting pipe 17. Finally, the cleaned or new filter screen 1 is reinstalled at the bottom of the filter cylinder 2, ready for the next use.

[0031] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A wastewater pretreatment device, comprising a filter cylinder (2) and a filter screen (1); the filter screen (1) is disposed inside the filter cylinder (2), and the filter cylinder (2) is located at a position corresponding to a wastewater pipe (3); a transfer box (12) is placed below the filter cylinder (2), and a transfer pipe (18) is connected to the bottom of the transfer box (12); characterized in that: The filter cylinder (2) is provided with an L-shaped bracket (4) fixedly installed on the ground on the rear side. There are two sets of filter cylinder (2) and filter screen (1). The filter cylinder (2) is suspended in the air. The filter screen (1) is fixedly connected to the bottom of the filter cylinder (2) by screws. The two sets of filter cylinders (2) are connected to the bracket (4) through a rotating mechanism. The bracket (4) is provided with a fixed frame (10) fixedly installed on the ground on the side. The filter cylinder (2) away from the sewage pipe (3) is located in the fixed frame (10). The fixed frame (10) is provided with a lifting plate (13) that slides up and down. The lifting plate (13) is provided with a cleaning component that can wash and wipe the impurities on the inner wall of the filter cylinder (2). The filter cylinder (2) away from the sewage pipe (3) is provided with a waste box (11) for receiving wastewater and waste materials. The waste box (11) is connected to the transfer box (12) through a connecting pipe (17).

2. The wastewater pretreatment device according to claim 1, characterized in that: The cleaning assembly includes a wiping block (14) and a nozzle (15); the wiping block (14) capable of wiping the inner wall of the filter cylinder (2) downwards is fixedly sleeved on the side wall of the lifting plate (13), and several nozzles (15) capable of spraying water to rinse the inner wall of the filter cylinder (2) are fixedly connected below the lifting plate (13).

3. The wastewater pretreatment device according to claim 2, characterized in that: An electric telescopic rod (7) is provided on the fixed frame (10), and the working end of the electric telescopic rod (7) is fixedly connected to the lifting plate (13).

4. A wastewater pretreatment device according to claim 3, characterized in that: A water tank (8) containing clean water is fixedly installed on the fixed frame (10), and a water pump (9) is installed on the water tank (8), and the water pump (9) is connected to the nozzle (15) through a delivery pipe.

5. A wastewater pretreatment device according to claim 1, characterized in that: The rotating mechanism includes a rotating motor (5) and a rotating rod (6); the rotating motor (5) is mounted on the bracket (4), and the rotating rod (6) fixedly connected to the output end of the rotating motor (5) is also fixedly connected to the two filter cylinders (2).

6. A wastewater pretreatment device according to claim 1, characterized in that: The waste bin (11) is fixedly equipped with a detachable separation net (16), and a one-way valve is installed on the connecting pipe (17).

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