Biochemical flotation wastewater treatment scraper device

Abstract

The present application relates to the field of sewage treatment, in particular to a biochemical flotation sewage treatment scraping device, comprising a workbench and a scraper, the workbench having a connecting cavity, a cleaning device connected to the workbench, the cleaning device comprising a drive assembly and a cleaning plate, the drive assembly being connected to the workbench, the cleaning plate being connected to the drive assembly, the drive assembly driving the cleaning plate to slide in the connecting cavity, when the scraper slides in a direction close to the cleaning plate, the cleaning end of the cleaning plate abuts the scraper surface, the drive assembly driving the cleaning plate to slide in the connecting cavity, and the cleaning end of the cleaning plate scrapes off the scum on the scraper surface. The arrangement of the drive assembly and the cleaning plate in the present application realizes automatic cleaning of the scum on the scraper surface, eliminating the need for manual cleaning of the scraper by the staff, making it difficult for the scraper to adhere to the scum and perform a second scraping, thereby ensuring the scraper's efficiency in scraping the sewage pool, shortening the entire sewage treatment cycle, and reducing the investment cost of sewage treatment.

Description

Technical Field

[0001] The present application relates to the field of sewage treatment, and in particular to a biochemical flotation sewage treatment scraping device. Background Art

[0002] Biochemical flotation is a commonly used water treatment technology, widely used in sewage treatment, wastewater treatment and water source purification. Biochemical flotation uses bubbles to attach to the surface of suspended matter and, under the buoyancy of the liquid, bring the suspended matter to the liquid surface to form froth. The froth forms a layer of scum on the liquid surface, which is collected by a scraper. It can effectively remove pollutants such as suspended matter, suspended oil and pigments in the sewage, thereby improving the water purification effect.

[0003] When the scraper scrapes the sewage pool for the first time, a lot of scum will adhere to the surface. If it is not cleaned in time and the second scraping is performed, the attached scum will be mixed into the sewage again, thereby increasing the number of times the scraper scrapes the sewage pool, extending the entire sewage treatment cycle, and increasing the investment cost of sewage treatment. Summary of the Invention

[0004] In order to improve the problem that a lot of scum will adhere to the surface after scraping by the scraper, the present application provides a biochemical gas flotation wastewater treatment scum scraping device.

[0005] This application provides a biochemical flotation wastewater treatment scraping device, which adopts the following technical solutions:

[0006] A biochemical gas flotation sewage treatment scraping device includes a workbench and a scraper. The workbench has a connecting cavity for the scraper to slide. When the scraper slides on the inner wall of the connecting cavity, the bottom of the scraper scrapes off the scum in the sewage pool. The workbench is connected to a cleaning device, which includes a driving assembly and a cleaning plate. The driving assembly is connected to the workbench, and the cleaning plate is connected to the driving assembly. The driving assembly drives the cleaning plate to slide in the connecting cavity. The sliding direction of the cleaning plate and the sliding direction of the scraper are perpendicular to each other. When the scraper slides in a direction close to the cleaning plate, the cleaning end of the cleaning plate abuts the scraper surface. The driving assembly drives the cleaning plate to slide in the connecting cavity, and the cleaning end of the cleaning plate scrapes off the scum on the scraper surface.

[0007] By adopting the above technical solution, when the biochemical gas flotation sewage treatment scraping device is used, the scraper slides along the inner wall of the connecting cavity toward the cleaning plate, and the bottom of the scraper scrapes off the scum in the sewage pool. At the same time, part of the scum adheres to the scraper surface, and the cleaning end of the cleaning plate abuts the scraper surface. The driving component drives the cleaning plate to slide in the connecting cavity, and the cleaning end of the cleaning plate scrapes off the scum on the scraper surface, thereby realizing automatic cleaning of the scum on the scraper surface. There is no need for the staff to manually clean the scraper, so that the scraper is not easily adhered to the scum and scraped for the second time, thereby ensuring the scraper's scraping efficiency of the sewage pool, shortening the entire sewage treatment working cycle, and reducing the investment cost of sewage treatment.

[0008] Optionally, the cleaning device also includes a cleaning air pump, which is connected to a workbench. The workbench has an outlet air duct on its surface facing the outlet end of the cleaning air pump. The outlet air duct is connected to the connecting cavity, and the outlet air duct is located in the notch of the connecting cavity facing the cleaning end of the cleaning plate.

[0009] By adopting the above technical solution, when the cleaning end of the cleaning plate abuts the scraper surface, the cleaning air pump drives air through the outlet air duct to impact the cleaning end of the cleaning plate, driving the scum on the cleaning end of the cleaning plate to fall off, making it difficult for scum to adhere to the cleaning end of the cleaning plate, thereby ensuring the stability of the cleaning plate in cleaning the scum on the scraper surface.

[0010] Optionally, the driving assembly includes a reciprocating screw and a driving impeller, the reciprocating screw is rotatably connected to the inner wall of the connecting chamber, the surface of the cleaning plate is provided with a threaded groove for the threaded connection of the outer wall of the reciprocating screw, the cleaning plate slides in the connecting chamber along the axis of the reciprocating screw, the inner wall of the outlet air flow channel is provided with a rotating chamber, the driving impeller is rotatably connected to the inner wall of the rotating chamber, some blades of the driving impeller are located in the outlet air flow channel, the end of the reciprocating screw passes through the inner wall of the connecting chamber and is coaxially connected to the rotating shaft of the driving impeller, when air passes through the outlet air flow channel and impacts the blades of the driving impeller, the driving impeller is driven to rotate in the rotating chamber, driving the cleaning plate to slide in the connecting chamber along the axis of the reciprocating screw.

[0011] By adopting the above technical solution, when the cleaning end of the cleaning plate abuts the scraper surface, the cleaning air pump drives air through the outlet air duct to impact the cleaning end of the cleaning plate; at the same time, when the air passes through the outlet air duct, it impacts the driving impeller blades and drives the driving impeller to rotate in the rotating chamber. The end of the reciprocating screw and the driving impeller rotating shaft are coaxially connected, driving the reciprocating screw to rotate on the inner wall of the connecting chamber, driving the cleaning plate to rotate along the axis of the reciprocating screw in the transmission chamber, and the cleaning end of the cleaning plate scrapes off the scum on the scraper surface, realizing automatic sliding of the cleaning plate, without the need for an external power device to drive the cleaning plate to slide, reducing energy loss, and embodying the concept of energy saving.

[0012] Optionally, a cleaning channel is opened on the inner wall of the outlet flow channel, the cleaning channel is connected to the connecting cavity, the cleaning channel is located in the connecting cavity with the slot facing the scraper surface, the cleaning channel in the connecting cavity slot and the outlet flow channel in the connecting cavity slot are located on both sides of the reciprocating screw axis.

[0013] By adopting the above technical solution, when the cleaning end of the cleaning plate abuts the scraper surface, the cleaning air pump drives air through the outlet air channel to impact the cleaning end of the cleaning plate, driving the scum to separate from the cleaning end of the cleaning plate, thereby ensuring the stability of the cleaning plate in cleaning the scraper; at the same time, the air in the outlet air channel impacts the scraper surface through the cleaning channel, driving the scum adhered to the scraper surface to separate, realizing the preliminary cleaning of the scum on the scraper surface, thereby improving the cleaning efficiency of the scum adhered to the scraper surface.

[0014] Optionally, a limiting device is connected between the cleaning plate and the workbench, and the limiting device includes an electromagnet and a magnetic block. The electromagnet is connected to the surface of the cleaning plate facing the cleaning flow channel, and the inner wall of the connecting cavity is provided with a limiting groove for embedding the power supply magnet. The magnetic block is connected to the inner wall of the limiting groove. When the electromagnet is energized and has magnetism, the cleaning plate slides toward the limiting groove, and the electromagnet is embedded in the limiting groove. The electromagnet and the magnetic block have opposite poles that attract each other and limit the sliding of the cleaning plate. The air discharged from the cleaning flow channel impacts the cleaning end of the cleaning plate.

[0015] By adopting the above technical solution, when the electromagnet is energized and has magnetism, the cleaning plate slides along the axis of the reciprocating screw toward the direction close to the cleaning flow channel, and the electromagnet is embedded in the limiting groove. The electromagnet and the magnetic block attract each other with opposite poles and limit the sliding of the cleaning plate, thereby realizing the limitation of the cleaning plate on the reciprocating screw. The air discharged from the cleaning flow channel steadily impacts the cleaning end of the cleaning plate, driving the slag away from the cleaning end of the cleaning plate, thereby improving the cleaning efficiency of the cleaning plate, thereby ensuring the cleaning efficiency of the cleaning plate on the scraper.

[0016] Optionally, the limiting device also includes a detection component, which includes a pressure sensor and a controller. The pressure sensor is connected to the inner wall of the thread groove, and the controller is connected between the pressure sensor and the electromagnet. The pressure sensor is used to detect the pressure value of the cleaning plate on the reciprocating screw and send the pressure value to the controller, and the controller controls the operation of the electromagnet.

[0017] By adopting the above technical solution, when scum adheres to the cleaning end of the cleaning plate, the gravity of the cleaning plate itself increases, increasing the pressure of the cleaning plate on the reciprocating screw. The pressure sensor is used to detect the pressure value of the cleaning plate on the reciprocating screw and send the pressure value to the controller. The controller compares the pressure value with the preset value. When the pressure value is greater than the preset value, the controller drives the electromagnet to be energized, and the cleaning plate slides along the axis of the reciprocating screw toward the direction of the cleaning flow channel. The electromagnet is embedded in the limit groove to realize the limit of the cleaning plate on the reciprocating screw, and the air discharged from the cleaning flow channel stably impacts the cleaning plate. The cleaning end improves the cleaning efficiency of the cleaning plate. When excess scum leaves the cleaning end of the cleaning plate, the gravity of the cleaning plate itself decreases, and the pressure of the cleaning plate on the reciprocating screw rod decreases. The controller compares the pressure value with the preset value. When the pressure value is equal to the preset value, the controller drives the electromagnet to cut off the power, the attraction between the electromagnet and the magnetic block disappears, and the limiting effect of the cleaning plate on the reciprocating screw rod disappears, realizing the directional sliding of the cleaning plate. There is no need for the staff to manually control the sliding of the cleaning plate, reducing the work pressure of the staff and improving the working efficiency of the biochemical gas flotation sewage treatment scraping device for sewage treatment.

[0018] Optionally, the outlet flow channel is connected to an inner wall thereof facing the communicating cavity with a first solenoid valve, and the first solenoid valve can control the on-off of the outlet flow channel.

[0019] By adopting the above technical solution, when the cleaning plate approaches the cleaning flow channel, the solenoid valve closes the outlet flow channel, and the cleaning air pump drives the air to be discharged from the cleaning flow channel through the outlet flow channel, so that the air can stably impact the scum adhered to the cleaning end of the cleaning plate, thereby improving the cleaning efficiency of the cleaning plate.

[0020] Optionally, a second solenoid valve is connected to the inner wall of the cleaning flow channel facing the communicating cavity, and the second solenoid valve can control the opening and closing of the cleaning flow channel.

[0021] By adopting the above technical solution, when the cleaning plate approaches the outlet flow channel, solenoid valve 2 is closed and solenoid valve 1 is opened to close the cleaning flow channel. The cleaning air pump drives air to be discharged from the outlet flow channel, and the air steadily impacts the scum adhered to the cleaning end of the cleaning plate, thereby ensuring the cleaning efficiency of the cleaning plate on the scraper.

[0022] Optionally, a lifting platform is slidably connected to the workbench, the sliding direction of the lifting platform and the sliding direction of the scraper are parallel to each other, the lifting platform is connected to a lifting screw rod that rotates toward the surface of the scraper, the scraper is threadedly connected to the outer wall of the lifting screw rod, and the scraper is lifted and lowered on the inner wall of the connecting cavity along the axis of the lifting screw rod.

[0023] By adopting the above technical solution, the lifting screw is driven to rotate, driving the scraper to rise and fall along the axis of the lifting screw on the inner wall of the connecting cavity. The thickness of the scraper penetrating into the sewage pool is equal to the thickness of the scum. The scraper stably scrapes the scum in the sewage pool, and the depth of the scraper penetrating into the sewage pool can be automatically adjusted according to the thickness of the scum. The lifting platform slides on the workbench, driving the scraper to scrape the scum in the sewage pool, reducing the number of times the scraper scrapes the scum in the sewage pool, thereby improving the efficiency of sewage treatment.

[0024] Optionally, a sliding groove for the lifting platform to slide is provided on the surface of the workbench, and a roller is connected to the surface of the lifting platform that rotates toward the sliding groove, and the wheel surface of the roller is in rolling contact with the inner wall of the sliding groove.

[0025] By adopting the above technical solution, when the lifting platform slides on the surface of the workbench, the roller surface rolls in contact with the inner wall of the slide groove, and rolling friction replaces sliding friction, thereby reducing the wear between the lifting platform and the workbench and extending the service life of the biochemical flotation sewage treatment scraping device.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The setting of the drive component and the cleaning plate can realize the automatic cleaning of the scraper surface scum, eliminating the need for manual cleaning of the scraper by staff, making it difficult for the scraper to adhere to scum and perform a second scraping, thereby ensuring the scraper's scraping efficiency on the sewage pool, shortening the entire sewage treatment cycle, and reducing the investment cost of sewage treatment;

[0028] 2. The setting of the cleaning air pump and the outlet air channel drives the scum on the cleaning end of the cleaning plate to separate, making it difficult for the cleaning end of the cleaning plate to adhere to the scum, thereby ensuring the stability of the cleaning plate in cleaning the scum on the scraper surface;

[0029] 3. The arrangement of the reciprocating screw and the driving impeller enables the cleaning end of the cleaning plate to scrape away the scum on the surface of the scraper plate, thereby realizing the automatic sliding of the cleaning plate. No external power device is required to drive the cleaning plate to slide, thereby reducing energy loss and embodying the concept of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0031] Figure 2 It is a cross-sectional view of an embodiment of the present application, mainly showing the limiting device.

[0032] Figure 3 It is a cross-sectional view of an embodiment of the present application, mainly showing the detection component.

[0033] Figure 4 It is a cross-sectional view of an embodiment of the present application, mainly showing the air flow channel and the cleaning flow channel.

[0034] Figure 5 It is a cross-sectional view of an embodiment of the present application, mainly showing solenoid valve 1 and solenoid valve 2.

[0035] Explanation of the accompanying symbols: 1. Workbench; 11. Slide; 12. Connecting chamber; 13. Outlet flow channel; 14. Cleaning flow channel; 15. Rotating chamber; 16. Limiting groove; 2. Lifting platform; 3. Scraper; 4. Roller; 5. Lifting screw; 6. Motor 1; 7. Rotating assembly; 71. Motor 2; 72. Rotating screw; 8. Cleaning device; 81. Driving assembly; 811. Reciprocating screw; 812. Driving impeller; 82. Cleaning plate; 821. Threaded groove; 83. Cleaning air pump; 9. Solenoid valve 1; 10. Solenoid valve 2; 17. Limiting device; 171. Electromagnet; 172. Magnetic block; 173. Detection assembly; 1731. Pressure sensor. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-5 This application is described in further detail.

[0037] The present application discloses a biochemical flotation wastewater treatment scraping device. Figure 1 and Figure 2 The lifting platform 2 is provided with a plurality of rollers 4, each of which is connected to the lifting platform 1 and the lifting platform 2 is connected to the lifting platform 1.

[0038] Reference Figure 1 A connecting cavity 12 for the sliding of the scraper 3 is provided on the top surface of the workbench 1. The connecting cavity 12 runs through the surface of the workbench 1. The sliding direction of the scraper 3 and the sliding direction of the lifting platform 2 are parallel to each other. The lifting platform 2 is connected to the surface of the connecting cavity 12 and rotates with a lifting screw 5. The axis of the lifting screw 5 and the height direction of the workbench 1 are parallel to each other. The scraper 3 is threadedly connected to the outer wall of the lifting screw 5. The scraper 3 rises and falls along the axis of the lifting screw 5 on the inner wall of the connecting cavity 12, so that the position of the scraper 3 on the inner wall of the connecting cavity 12 can be adjusted.

[0039] Reference Figure 1The end face of the lifting platform 2 facing away from the lifting screw 5 is bolted with a motor 6, and the motor shaft of the motor 6 passes through the surface of the lifting platform 2 and is coaxially welded and fixed to the end of the lifting screw 5; when the workbench 1 is placed above the sewage pool, the motor 6 drives the lifting screw 5 to rotate, and the scraper 3 slides along the axis of the lifting screw 5 on the inner wall of the connecting cavity 12, so that the scraper 3 penetrates into the sewage pool to a depth matching the thickness of the scum. At the same time, the lifting platform 2 slides on the workbench 1, driving the scraper 3 to slide on the inner wall of the connecting cavity 12, and the scraper 3 scrapes off the scum in the sewage pool, thereby realizing directional cleaning of the scum in the sewage pool.

[0040] Reference Figure 1 The workbench 1 is connected to a rotating assembly 7, which can drive the lifting platform 2 to slide. The rotating assembly 7 includes a second motor 71 and a rotating screw 72. The rotating screw 72 is rotatably connected to the inner wall of one of the chutes 11. The axis of the rotating screw 72 and the length direction of the chutes 11 are parallel to each other. The lifting platform 2 is threadedly connected to the outer wall of the rotating screw 72. The second motor 71 is fixed to the surface of the workbench 1 by bolts. The end of the motor shaft of the second motor 71 passes through the surface of the workbench 1 and is coaxially welded and fixed to the end of the rotating screw 72. When the second motor 71 is running, it drives the rotating screw 72 to rotate on the inner wall of the chutes 11, driving the lifting platform 2 to slide on the workbench 1 along the axis of the rotating screw 72, thereby realizing directional sliding of the lifting platform 2. There is no need for the staff to manually control the sliding of the lifting platform 2, thereby improving the convenience of the staff in using the biochemical gas flotation wastewater treatment scraping device.

[0041] Reference Figure 3 and Figure 4 A cleaning device 8 is connected to the workbench 1, and the cleaning device 8 can clean the scum adhered to the surface of the scraper 3. The cleaning device 8 includes a driving assembly 81, a cleaning plate 82 and a cleaning air pump 83, and the cleaning air pump 83 is fixed to the surface of the workbench 1 by bolts. An outlet flow channel 13 is provided on the surface of the workbench 1 facing the cleaning air pump 83. The end of the outlet flow channel 13 away from the cleaning air pump 83 passes through the surface of the workbench 1 and is connected to the connecting cavity 12. A cleaning flow channel 14 is provided on the inner wall of the outlet flow channel 13. The end of the cleaning flow channel 14 away from the outlet flow channel 13 passes through the surface of the workbench 1 and is connected to the connecting cavity 12. The outlet flow channel 13 at the opening of the connecting cavity 12 and the cleaning flow channel 14 at the opening of the connecting cavity 12 are located on both sides of the width direction of the workbench 1.

[0042] Reference Figure 3 and Figure 4The driving assembly 81 is connected between the cleaning plate 82 and the workbench 1, and the driving assembly 81 can drive the cleaning plate 82 to slide in the connecting chamber 12. The driving assembly 81 includes a reciprocating screw 811 and a driving impeller 812. The reciprocating screw 811 is rotatably connected to the inner wall of the connecting chamber 12. The axis of the reciprocating screw 811 and the wide band direction of the workbench 1 are parallel to each other. The surface of the cleaning plate 82 is provided with a thread groove 821 for threading the outer wall of the reciprocating screw 811. The cleaning end of the cleaning plate 82 can be pressed against the surface of the scraper 3, and the cavity opening of the outlet flow channel 13 in the connecting chamber 12 and the cavity opening of the cleaning flow channel 14 in the connecting chamber 12 are both oriented toward the cleaning end of the cleaning plate 82.

[0043] Reference Figure 4 and Figure 5 A rotating chamber 15 is provided on the inner wall of the outlet air duct 13 for driving the impeller 812 to rotate. Part of the blades of the driving impeller 812 are located in the outlet air duct 13. The end of the reciprocating screw 811 close to the outlet air duct 13 passes through the inner wall of the connecting chamber 12 and is coaxially welded and fixed to the rotating shaft of the driving impeller 812. When the scraper 3 slides along the inner wall of the connecting chamber 12 toward the cleaning plate 82, the cleaning end of the cleaning plate 82 presses against the surface of the scraper 3, and the cleaning air pump 83 drives air to be discharged from the outlet flow channel 13 and impact the contact point between the scraper 3 and the cleaning plate 82, driving the scum off the surface of the scraper 3. The air in the outlet flow channel 13 impacts the blades of the driving impeller 812, driving the impeller 812 to rotate and drive the reciprocating screw 811 to rotate, so that the cleaning plate 82 slides along the axis of the reciprocating screw 811 in the connecting chamber 12, and the cleaning end of the cleaning plate 82 stably scrapes off the scum on the surface of the scraper 3, realizing directional cleaning of the scum on the surface of the scraper 3. At the same time, part of the air in the outlet flow channel 13 impacts the surface of the scraper 3 through the cleaning flow channel 14, driving the scum off the surface of the scraper 3, further improving the cleaning efficiency of the scum on the surface of the scraper 3.

[0044] Reference Figure 4 and Figure 5 The outlet flow channel 13 is connected to an electromagnetic valve 9 toward the inner wall of the connecting chamber 12, and the electromagnetic valve 9 can control the on-off of the outlet flow channel 13. The cleaning flow channel 14 is connected to an electromagnetic valve 2 10 toward the inner wall of the connecting chamber 12, and the electromagnetic valve 2 10 can control the on-off of the cleaning flow channel 14; the staff can open the cleaning flow channel 14 and the outlet flow channel 13 in a directional manner.

[0045] Reference Figure 2 and Figure 3A limiting device 17 is connected between the cleaning plate 82 and the workbench 1. The limiting device 17 can perform directional cleaning on the cleaning plate 82. The limiting device 17 includes an electromagnet 171, a magnetic block 172 and a detection component 173. The electromagnet 171 is fixed on the surface of the cleaning plate 82 facing the cleaning flow channel 14. The detection component 173 can control the operation of the electromagnet 171. The detection component 173 includes a pressure sensor 1731 and a controller. The pressure sensor 1731 is installed on the inner wall of the thread groove 821. The controller is connected between the pressure sensor 1731 and the electromagnet 171. The pressure sensor 1731 can detect the pressure value of the cleaning plate 82 on the reciprocating screw 811 and send the pressure value to the controller. A preset value is set in the controller. The preset value is the self-gravity of the cleaning plate 82. In the embodiment of the present application, the preset value is 20 Newtons. The controller compares the pressure value with the preset value.

[0046] Reference Figure 2 and Figure 5 When the pressure value is greater than the preset value, the controller drives the solenoid valve to be energized and magnetic; when the pressure value is equal to the preset value, the controller drives the solenoid valve to be de-energized and lose its magnetism. The inner wall of the connecting cavity 12 is provided with a limit groove 16 in which the power supply magnet 171 is embedded. The magnetic block 172 is fixed on the inner wall of the limit groove 16. When the cleaning plate 82 slides along the axis of the reciprocating screw 811 toward the limit groove 16, the cleaning end of the cleaning plate 82 scrapes off the scum on the surface of the scraper 3. Part of the scum adheres to the surface of the cleaning plate 82. The pressure of the cleaning plate 82 on the reciprocating screw 811 increases. The pressure value is greater than the preset value. The controller drives the electromagnet 171 to be energized and magnetic. The electromagnet 171 is embedded in the limit groove 16. The electromagnet 171 and the magnetic block 172 are in a state of being opposite to each other. The poles attract each other and limit the cleaning plate 82 to the reciprocating screw 811. The air discharged from the cleaning flow channel 14 steadily impacts the surface of the cleaning plate 82, so that the scum is separated from the surface of the cleaning plate 82, and the surface of the cleaning plate 82 is automatically cleaned. At the same time, the pressure of the cleaning plate 82 on the reciprocating screw 811 is reduced, and the pressure value is equal to the preset value. The controller drives the electromagnet 171 to cut off the power and lose its magnetism. The attraction between the magnetic block 172 and the electromagnet 171 disappears, and the cleaning plate 82 slides back and forth along the axis of the reciprocating screw 811, thereby improving the cleaning efficiency of the cleaning plate 82 on the scraper 3.

[0047] The implementation principle of the scraping device for biochemical flotation sewage treatment according to the embodiment of the present application is as follows: when the scraping device for biochemical flotation sewage treatment is used, the workbench 1 is placed above the sewage pool, the motor 1 6 drives the lifting screw 5 to rotate, and the scraper 3 slides on the inner wall of the connecting cavity 12 along the axis of the lifting screw 5, so that the scraper 3 penetrates into the sewage pool to a depth that matches the thickness of the scum, and at the same time, the operation of the motor 2 71 drives the rotating screw 72 to rotate on the inner wall of the slide 11, drives the lifting platform 2 to slide on the workbench 1 along the axis of the rotating screw 72, drives the scraper 3 to slide on the inner wall of the connecting cavity 12, and scrapes off the scum in the sewage pool, thereby realizing directional cleaning of the scum in the sewage pool; at the same time, the cleaning end of the cleaning plate 82 is pressed against the surface of the scraper 3, and the cleaning air pump 83 drives air from the outlet The airflow channel 13 discharges and impacts the contact point between the scraper 3 and the cleaning plate 82, driving the scum away from the surface of the scraper 3, thereby achieving preliminary cleaning of the scum on the surface of the scraper 3. At the same time, the air in the outlet airflow channel 13 impacts the blades of the driving impeller 812, driving the impeller 812 to rotate and drive the reciprocating screw 811 to rotate, so that the cleaning plate 82 slides along the axis of the reciprocating screw 811 in the connecting cavity 12. The cleaning end of the cleaning plate 82 stably scrapes off the scum on the surface of the scraper 3, thereby achieving automatic cleaning of the scum on the surface of the scraper 3. There is no need for the staff to manually clean the scraper 3, so that the scraper 3 is not easy to adhere to the scum and perform a second scraping, thereby ensuring the scraping efficiency of the scraper 3 on the sewage pool, shortening the working cycle of the entire sewage treatment, and reducing the investment cost of sewage treatment.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. Biochemical flotation wastewater treatment scraping device, characterized by: The invention comprises a workbench and a scraper, wherein the workbench has a connecting cavity for the scraper to slide, and when the scraper slides on the inner wall of the connecting cavity, the bottom of the scraper scrapes off the scum in the sewage pool, and the workbench is connected to a cleaning device, and the cleaning device comprises a driving assembly and a cleaning plate, wherein the driving assembly is connected to the workbench, and the cleaning plate is connected to the driving assembly, and the driving assembly drives the cleaning plate to slide in the connecting cavity, and the sliding direction of the cleaning plate and the sliding direction of the scraper are perpendicular to each other, and when the scraper slides in a direction close to the cleaning plate, the cleaning end of the cleaning plate abuts against the scraper surface, and the driving assembly drives the cleaning plate to slide in the connecting cavity, and the cleaning end of the cleaning plate scrapes off the scum on the scraper surface; The cleaning device also includes a cleaning air pump, the cleaning air pump is connected to a workbench, and an outlet flow channel is opened on the surface of the workbench facing the outlet end of the cleaning air pump, the outlet flow channel is connected to the communication cavity, and the outlet flow channel is located in the notch of the communication cavity toward the cleaning end of the cleaning plate; The drive assembly includes a reciprocating screw and a driving impeller, the reciprocating screw is rotatably connected to the inner wall of the connecting cavity, the surface of the cleaning plate is provided with a thread groove for the outer wall of the reciprocating screw to be threadedly connected, the cleaning plate slides along the axis of the reciprocating screw in the connecting cavity, and the inner wall of the outlet flow channel is provided with a cleaning flow channel; A limiting device is connected between the cleaning plate and the workbench, and the limiting device includes an electromagnet and a magnetic block. The electromagnet is connected to the surface of the cleaning plate facing the cleaning flow channel. The inner wall of the communicating cavity is provided with a limiting groove for embedding a power supply magnet. The magnetic block is connected to the inner wall of the limiting groove. When the electromagnet is energized and has magnetism, the cleaning plate slides toward the limiting groove. The electromagnet is embedded in the limiting groove. The electromagnet and the magnetic block have opposite poles that attract each other and limit the sliding of the cleaning plate. The air discharged from the cleaning flow channel impacts the cleaning end of the cleaning plate. The limiting device also includes a detection component, which includes a pressure sensor and a controller. The pressure sensor is connected to the inner wall of the thread groove, and the controller is connected between the pressure sensor and the electromagnet. The pressure sensor is used to detect the pressure value of the cleaning plate on the reciprocating screw and send the pressure value to the controller. The controller controls the operation of the electromagnet.

2. The biochemical flotation wastewater treatment scraping device according to claim 1, characterized in that: A rotating chamber (15) is provided on the inner wall of the outlet air passage (13); the driving impeller (812) is rotatably connected to the inner wall of the rotating chamber (15); part of the blades of the driving impeller (812) are located in the outlet air passage (13); the end of the reciprocating screw (811) passes through the inner wall of the connecting chamber (12) and is coaxially connected to the rotating shaft of the driving impeller (812); when air passes through the outlet air passage (13) and impacts the blades of the driving impeller (812), the driving impeller (812) is driven to rotate in the rotating chamber (15), thereby driving the cleaning plate (82) to slide along the axis of the reciprocating screw (811) in the connecting chamber (12).

3. The biochemical flotation wastewater treatment scraping device according to claim 2, characterized in that: The cleaning flow channel (14) is connected to the connecting chamber (12), and the cleaning flow channel (14) is located at a notch of the connecting chamber (12) facing the surface of the scraper (3). The notch of the cleaning flow channel (14) in the connecting chamber (12) and the notch of the outlet flow channel (13) in the connecting chamber (12) are located on both sides of the axis of the reciprocating screw (811).

4. The biochemical flotation wastewater treatment scraping device according to claim 1, characterized in that: The outlet flow channel (13) is connected to an electromagnetic valve (9) facing the inner wall of the communicating cavity (12), and the electromagnetic valve (9) can control the opening and closing of the outlet flow channel (13).

5. The biochemical flotation wastewater treatment scraping device according to claim 4, characterized in that: The cleaning flow channel (14) is connected to the inner wall of the communicating cavity (12) with a second electromagnetic valve (10), and the second electromagnetic valve (10) can control the opening and closing of the cleaning flow channel (14).

6. The biochemical flotation wastewater treatment scraping device according to claim 1, characterized in that: The workbench (1) is slidably connected to a lifting platform (2), the sliding direction of the lifting platform (2) and the sliding direction of the scraper (3) are parallel to each other, the lifting platform (2) is connected to a lifting screw (5) when rotating toward the surface of the scraper (3), the scraper (3) is threadedly connected to the outer wall of the lifting screw (5), and the scraper (3) is lifted and lowered on the inner wall of the connecting cavity (12) along the axis of the lifting screw (5).

7. The scraping device for biochemical flotation wastewater treatment according to claim 6, characterized in that: The surface of the workbench (1) is provided with a slide groove (11) for the lifting platform (2) to slide, and the lifting platform (2) is connected to a roller (4) when rotating toward the surface of the slide groove (11), and the wheel surface of the roller (4) is in rolling contact with the inner wall of the slide groove (11).

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