Solid-liquid isolation device for domestic sewage treatment

Abstract

The invention discloses a solid-liquid isolation device for domestic sewage treatment, belongs to the technical field of sewage treatment, and aims to solve the problems that the dehydration efficiency of filtered sludge and impurities is low, and meanwhile, grease and sludge attached to the interior of a drainage pipe are not easy to clean, the solid-liquid isolation device comprises a sewage pool, and a plurality of supporting legs are fixedly arranged at the bottom of the sewage pool; a filtering assembly is arranged in the sewage pool, stirring blades are arranged in the filtering assembly, a driving assembly is arranged at the top of the sewage pool, two first clamping assemblies are oppositely arranged in the driving assembly, a pressing assembly is arranged at the bottom of the driving assembly, two second clamping assemblies are oppositely arranged in the filtering assembly, and a scraping assembly is slidably arranged in the filtering assembly; sludge and impurities can be tightly pressed, the water content of the sludge and the impurities can be conveniently and rapidly reduced, the working efficiency is improved, meanwhile, the inner wall of the drainage assembly can be conveniently cleaned in a reciprocating mode, and blockage caused by attachment of oil stains and the sludge is avoided.

Description

A solid-liquid separation device for domestic sewage treatment Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a solid-liquid separation device for treating domestic wastewater. Background Technology

[0002] Solid-liquid separation devices for domestic sewage treatment are important equipment in sewage treatment systems used to separate sewage sludge, impurities, and liquid water. In use, domestic sewage undergoes pretreatment to filter out larger impurities before being transported to the sewage tank of the domestic sewage treatment plant. The sewage in the sewage tank is then treated using a filtration structure. The filtered clean water is discharged through pipelines for further treatment, while the filtered sludge and impurities remain in the filtration structure of the device, thus completing the solid-liquid separation operation.

[0003] In existing solid-liquid separation devices for domestic sewage treatment, after the filtered water is discharged, in order to ensure that the water content of sludge and impurities in the filter structure meets the standards for subsequent treatment, water is mostly removed by static drainage. This method has low water removal efficiency and takes a long time. At the same time, during long-term use, grease and fine sludge in the sewage easily adhere to the inner wall of the drain pipe in the sewage tank, gradually causing the pipe diameter to narrow and forming blockages. Existing cleaning methods mostly involve introducing airflow into the pipe through aeration equipment to impact and unclog it. However, the aeration pressure is dispersed and the impact force is limited, which cannot effectively dislodge stubborn blockages, resulting in poor cleaning effect and thus affecting the sewage treatment process.

[0004] To address the above problems, a solid-liquid separation device for domestic sewage treatment is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a solid-liquid separation device for domestic sewage treatment. By using this invention, the problems of low dewatering efficiency of filtered sludge and impurities and difficulty in cleaning grease and silt adhering to the drain pipe are solved.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A solid-liquid separation device for domestic sewage treatment includes a sewage tank with several support legs fixedly installed at the bottom. A filter assembly with stirring blades is installed inside the sewage tank. A drive assembly is installed at the top of the sewage tank, with two first snap-fit ​​components arranged opposite each other inside the drive assembly. A pressing component is installed at the bottom of the drive assembly. Two second snap-fit ​​components are arranged opposite each other inside the filter assembly. A scraping component is slidably installed inside the filter assembly. An insertion hole component is installed inside the pressing component. Two drainage components are installed at the bottom of the sewage tank. Two cleaning components are arranged opposite each other inside the sewage tank, with the two cleaning components respectively attached to the inner walls of the two drainage components. A flushing component is installed on one side of the sewage tank. The filter assembly includes a fixing ring fixedly connected inside the sewage tank, a first filter cylinder fixedly connected to the bottom of the fixing ring, a filter screen rotatably connected to the bottom of the first filter cylinder, stirring blades fixedly connected to one side of the filter screen, and a water inlet pipe on one side of the fixing ring.

[0008] Furthermore, the drive assembly includes a U-shaped plate fixedly connected to the top of the sewage tank, a servo motor mounted on the top of the U-shaped plate, a rectangular housing fixedly connected to the bottom of the U-shaped plate, a threaded rod fixedly connected to the output end of the servo motor, the threaded rod being rotatably connected to the U-shaped plate, a threaded sleeve being threadedly connected to the threaded rod, the threaded sleeve being slidably connected to the rectangular housing, and two first slots being provided opposite to each other on the outer wall of the threaded rod.

[0009] Furthermore, the first snap-fit ​​assembly includes a first electromagnet installed inside the threaded sleeve, a first slider slidably connected inside the threaded sleeve, a first magnet block installed on one side of the first slider, a first spring fixedly connected to one side of the first slider, and the other end of the first spring fixedly connected to the inner wall of the threaded sleeve.

[0010] Furthermore, the pressing assembly includes a pressure plate fixedly connected to the bottom of the threaded sleeve, a pressure sensor installed inside the pressure plate, a second spring fixedly connected to one side of the pressure sensor, a slide plate fixedly connected to one end of the second spring, the slide plate being slidably connected to the pressure plate, and two positioning rods being connected opposite each other at the top of the pressure plate.

[0011] Furthermore, the second snap-fit ​​assembly includes a second electromagnet installed inside the fixing ring, a second slider slidably connected inside the fixing ring, a second magnet block installed on one side of the second slider, a third spring fixedly connected to one side of the second slider, and the other end of the third spring fixedly connected to the inner wall of the fixing ring.

[0012] Furthermore, the scraping assembly includes an L-shaped scraper that is slidably connected to the outer wall of the positioning rod. The L-shaped scraper is fixedly connected to the filter screen. A movable block is fixedly connected to one side of the L-shaped scraper. The movable block is slidably connected to the fixed ring. A second slot is provided on one side of the L-shaped scraper.

[0013] Furthermore, the socket assembly includes several sliding columns slidably connected to the pressure plate. One end of each sliding column is fixedly connected to a second filter cartridge, and the other end of each sliding column is fixedly connected to a horizontal plate. Two connecting rods are slidably connected inside the horizontal plate, and one end of each connecting rod is fixedly connected to the pressure plate. A fourth spring is fixedly connected to the bottom of the horizontal plate, and one end of the fourth spring is fixedly connected to the pressure plate.

[0014] Furthermore, the drainage assembly includes a drain pipe connected to the bottom of the sewage tank, with a centrifugal pump connected to one end of the drain pipe.

[0015] Furthermore, the cleaning assembly includes two first arc-shaped plates fixedly connected to the bottom of the filter screen, several support rods fixedly connected inside the sewage tank, a protective shell fixedly connected to one end of each support rod, a lifting rod slidably connected inside the protective shell, a second arc-shaped plate fixedly connected to the top of the lifting rod, a third slider fixedly connected to the outer wall of the lifting rod, the third slider slidably connected to the protective shell, a fifth spring fixedly connected to one side of the third slider, and the other end of the fifth spring fixedly connected to the inner wall of the protective shell, several scraping rings evenly fixedly connected inside the lifting rod, the scraping rings fitting against the inner wall of the drain pipe, and inclined surfaces provided on both sides of the scraping rings.

[0016] Furthermore, the flushing assembly includes a high-pressure water pump installed on the outer wall of the sewage tank, with an outlet pipe connected to the outlet end of the high-pressure water pump, and the outlet pipe connected to two connecting pipes.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: by using the driving component in conjunction with two first snap-fit ​​components and two second snap-fit ​​components, two driving methods can be realized, making it more flexible to use.

[0018] By driving the scraping component to rotate slowly, it is not only convenient for the flocculant to be fully mixed with the sewage to form uniform flocs that are easy to intercept, but also convenient to prevent the newly formed flocs from adhering to the surface of the filter component, thus ensuring the filtration effect of the filter component.

[0019] By using the pressing component in conjunction with the filter component to compress sludge and impurities, the moisture content of sludge and impurities can be quickly reduced, improving work efficiency. At the same time, the insertion component can be inserted into the sludge to divide it into multiple vertical spaces, forming a three-dimensional drainage path, so that water can be discharged from multiple spaces simultaneously. Compared with traditional filter presses, it can effectively avoid the problem of uneven dehydration caused by local water accumulation, and improve dehydration efficiency and treatment effect.

[0020] By incorporating cleaning and flushing components, along with a filter component, the inner wall of the drainage component can be cleaned repeatedly, preventing clogging caused by oil and sludge. After the clean water is extracted, the flushing component can perform high-pressure flushing on the inner wall of the drainage component, easily removing any residual dirt after repeated cleaning and extending the service life of the equipment. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 is an enlarged view of point A in Figure 2; Figure 4 is an enlarged view of point B in Figure 2; Figure 5 is an enlarged view of point C in Figure 2; Figure 6 is an enlarged view of point D in Figure 2; Figure 7 is an enlarged view of point E in Figure 2; Figure 8 is an enlarged view of point F in Figure 2; Figure 9 is a schematic diagram of the cross-sectional structure of the filter assembly of the present invention; Figure 10 is a schematic diagram of the cross-sectional structure of the drive assembly of the present invention; Figure 11 is an enlarged view of point G in Figure 10; Figure 12 is a schematic diagram of the cross-sectional structure of the socket assembly of the present invention.

[0022] In the diagram: 1. Sewage tank; 11. Support leg; 2. Filter assembly; 21. Fixing ring; 22. First filter cartridge; 23. Filter screen; 24. Inlet pipe; 3. Stirring blade; 4. Drive assembly; 41. U-shaped plate; 42. Servo motor; 43. Rectangular housing; 44. Threaded rod; 45. Threaded sleeve; 46. First slot; 5. First snap-fit ​​assembly; 51. First electromagnet; 52. First slider; 53. First magnet; 54. First spring; 6. Pressing assembly; 61. Pressure plate; 62. Pressure sensor; 63. Second spring; 64. Slide plate; 65. Positioning rod; 7. Second snap-fit ​​assembly; 71. Second electromagnet; 72. Second slider; 73. Second 74. Magnetic block; 8. Third spring; 9. Scraping assembly; 10. L-shaped scraper; 11. Moving block; 12. Second slot; 13. Insertion assembly; 14. Sliding column; 15. Second filter cartridge; 16. Horizontal plate; 17. Connecting rod; 18. Fourth spring; 19. Drainage assembly; 10. Drainage pipe; 10. Centrifugal pump; 20. Cleaning assembly; 201. First arc plate; 202. Support rod; 203. Protective shell; 204. Lifting rod; 205. Second arc plate; 206. Third slider; 207. Fifth spring; 208. Scraper ring; 209. Inclined surface; 30. Flushing assembly; 301. High-pressure water pump; 302. Water outlet pipe; 303. Connecting pipe. Detailed Implementation

[0023] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] To address the technical problem of low dewatering efficiency of filtered sludge and impurities, as shown in Figures 1-5 and 7-12, the following preferred technical solution is provided: A solid-liquid separation device for domestic sewage treatment includes a sewage tank 1, which can bear and support various components. A controller is provided on one side of the sewage tank 1, which can control various electrical components. The controller is existing technology and is not shown in the figures. Several support legs 11 are fixedly installed at the bottom of the sewage tank 1. A filter assembly 2 is installed inside the sewage tank 1, as shown in Figure 2. A stirring blade 3 is installed inside the filter assembly 2, which can stir the sewage to improve the flocculation effect. A drive assembly 4 is installed at the top of the sewage tank 1. Two first snap-fit ​​components 5 are arranged opposite each other inside the drive assembly 4. A pressing component 6 is installed at the bottom of the drive assembly 4. Two second snap-fit ​​components 7 are arranged opposite each other inside the filter assembly 2. A scraping component 8 is slidably installed inside the filter assembly 2. An insertion component 9 is installed inside the pressing component 6. Two drainage components 10 are installed at the bottom of the sewage tank 1.

[0025] In operation, domestic sewage is pre-treated by external filtration equipment to filter out larger impurities. It then enters sewage tank 1 through filter assembly 2. Flocculant is subsequently added to sewage tank 1. At this point, the controller causes drive assembly 4 to slowly rotate the pressing assembly 6, scraping assembly 8, filter assembly 2, and stirring blade 3. This slow rotation of the scraping assembly 8 and stirring blade 3 facilitates thorough mixing of the flocculant and sewage, forming easily intercepted, uniform flocs. Simultaneously, it prevents newly formed flocs from adhering to the surface of filter assembly 2. After flocculation and settling for a period, sludge and impurities will settle inside filter assembly 2. At this point, the controller causes two drainage assemblies 10 to pump out the clean water from sewage tank 1, which is then sent to subsequent treatment equipment. During drainage, the scraping assembly... The rotation of component 8 prevents sludge and impurities from adhering to one side of filter component 2, thus affecting drainage efficiency. After the clean water in sewage tank 1 is pumped out, the controller causes drive component 4 to rotate scraping component 8 to the snap-fit ​​position. At this time, the position of scraping component 8 corresponds to the position of the two second snap-fit ​​components 7. Then, the controller activates the two first snap-fit ​​components 5, causing the components inside drive component 4 to separate. The controller then activates the two second snap-fit ​​components 7, connecting them to scraping component 8. Afterward, the controller causes drive component 4 to drive pressing component 6 to descend. The pressing component 6, in conjunction with filter component 2, compresses the sludge and impurities, which can easily and quickly reduce the water content of sludge and impurities, improving work efficiency.

[0026] During the compaction process, the real-time detection by the pressing component 6 allows for easy assessment of whether the moisture content of the sludge and impurities meets the standards for subsequent treatment. As the descent progresses, the insertion component 9 gradually inserts into the sludge and impurities until its bottom is flush with the inner wall of the filter component 2. This allows the insertion component 9 to separate the sludge and impurities into multiple vertical spaces, forming a three-dimensional drainage path. This facilitates the simultaneous discharge of water from multiple vertical spaces. Compared to existing dewatering methods using filter presses, this avoids localized water accumulation, preventing uneven dewatering and thus improving dewatering efficiency. It ensures that the sludge moisture content quickly meets the standards, thereby increasing... Work efficiency and treatment effect are assessed by the detection of the pressure component 6. When the water content of sludge and impurities reaches the standard for subsequent treatment, the pressure component 6 is driven to rise and reset by the drive component 4. Subsequently, the sludge and impurities in the filter component 2 are grabbed out by an external mechanical gripper. For the remaining small portion of sludge and impurities that are difficult to grab out, the user can flush in clean water through external equipment and then pump it out by an external sludge pump. Two cleaning components 20 are installed opposite each other in the sewage tank 1. The two cleaning components 20 are respectively attached to the inner wall of the two drainage components 10. A flushing component 30 is installed on one side of the sewage tank 1.

[0027] During the rotation of the filter assembly 2, it drives the two cleaning assemblies 20 to repeatedly clean the inner walls of the two drainage assemblies 10. This helps to prevent sludge and impurities from adhering and accumulating on the inner walls of the drainage assemblies 10, thus preventing blockages. It also helps to keep the drainage assemblies 10 unobstructed during the extraction of clean water, ensuring stable drainage efficiency. After the clean water is extracted, the controller allows external clean water to pass through the flushing assembly 30 to perform high-pressure flushing on the inner walls of the two drainage assemblies 10. This effectively removes any remaining dirt after the repeated cleaning, preventing cross-contamination of the wastewater treatment process by the residual dirt. It also further maintains the cleanliness of the drainage assembly 10 and extends the service life of the equipment.

[0028] As shown in Figures 1-2, 5 and 8-9, the filter assembly 2 includes a fixed ring 21 fixedly connected to the sewage tank 1. A first filter cylinder 22 is fixedly connected to the bottom of the fixed ring 21. A filter screen 23 is rotatably connected to the bottom of the first filter cylinder 22. A T-shaped rotating ring is fixedly connected to the top of the filter screen 23. A T-shaped limiting groove is opened at the bottom of the first filter cylinder 22. The T-shaped rotating ring is slidably connected to the T-shaped limiting groove, which can limit the movement of the filter screen 23. The first filter cylinder 22 and the filter screen 23 form a filter chamber. A stirring blade 3 is fixedly connected to one side of the filter screen 23. A water inlet pipe 24 is provided on one side of the fixed ring 21.

[0029] As shown in Figures 1-4 and 10-11, the drive assembly 4 includes a U-shaped plate 41 fixedly connected to the top of the sewage tank 1. A servo motor 42 is installed on the top of the U-shaped plate 41, and a rectangular housing 43 is fixedly connected to the bottom of the U-shaped plate 41. A threaded rod 44 is fixedly connected to the output end of the servo motor 42. The threaded rod 44 is rotatably connected to the U-shaped plate 41. A threaded sleeve 45 is threadedly connected to the threaded rod 44. The threaded sleeve 45 is slidably connected to the rectangular housing 43. Two first slots 46 are provided opposite to each other on the outer wall of the threaded rod 44. The servo motor 42 has a locking function.

[0030] As shown in Figures 3 and 11, the first snap-fit ​​assembly 5 includes a first electromagnet 51 installed inside the threaded sleeve 45, a first slider 52 slidably connected inside the threaded sleeve 45, a first magnet block 53 installed on one side of the first slider 52, a first spring 54 fixedly connected to one side of the first slider 52, and the other end of the first spring 54 is fixedly connected to the inner wall of the threaded sleeve 45. In the initial state, the first spring 54 pushes the first slider 52 to snap into the first slot 46, so that the threaded rod 44 is fixed to the threaded sleeve 45.

[0031] As shown in Figures 1-2 and 4, the pressing assembly 6 includes a pressure plate 61 fixedly connected to the bottom of the threaded sleeve 45. A pressure sensor 62 is installed inside the pressure plate 61. A second spring 63 is fixedly connected to one side of the pressure sensor 62, and a sliding plate 64 is fixedly connected to one end of the second spring 63. The sliding plate 64 is slidably connected to the pressure plate 61. Two positioning rods 65 are connected opposite each other to the top of the pressure plate 61. The pressure sensor 62 can detect the reaction force when the sludge is squeezed. By feeding back the sludge density through pressure changes, it can determine whether the moisture content meets the subsequent treatment standards. During the initial calibration, a squeezing experiment is conducted on sludge samples with different known moisture contents. The corresponding pressure values ​​detected by the pressure sensor 62 are recorded and preset in the controller so that the pressure value can match the moisture content in actual operation, ensuring the stability of detection accuracy and dewatering effect.

[0032] As shown in Figure 5, the second snap-fit ​​assembly 7 includes a second electromagnet 71 installed inside the fixing ring 21, a second slider 72 slidably connected inside the fixing ring 21, a second magnet block 73 installed on one side of the second slider 72, a third spring 74 fixedly connected to one side of the second slider 72, and the other end of the third spring 74 fixedly connected to the inner wall of the fixing ring 21. In the initial state, the second slider 72 is placed inside the fixing ring 21 by the elastic force of the third spring 74.

[0033] As shown in Figures 1-2 and 5, the scraping assembly 8 includes an L-shaped scraper 81 that is slidably connected to the outer wall of the positioning rod 65. The L-shaped scraper 81 is fixedly connected to the filter screen 23 and fits against the inner wall of the first filter cylinder 22. A moving block 82 is fixedly connected to one side of the L-shaped scraper 81 and is slidably connected to the fixing ring 21. A second slot 83 is provided on one side of the L-shaped scraper 81.

[0034] As shown in Figures 1-2 and 12, the socket assembly 9 includes several sliding posts 91 slidably connected to the pressure plate 61. One end of each sliding post 91 is fixedly connected to a second filter cartridge 92, and the other end of each sliding post 91 is fixedly connected to a horizontal plate 93. Two connecting rods 94 are slidably connected inside the horizontal plate 93. One end of each connecting rod 94 is fixedly connected to the pressure plate 61. A fourth spring 95 is fixedly connected to the bottom of the horizontal plate 93, and one end of the fourth spring 95 is fixedly connected to the pressure plate 61.

[0035] As shown in Figures 1-2 and 7-8, the drainage assembly 10 includes a drainage pipe 101 connected to the bottom of the sewage tank 1, and one end of the drainage pipe 101 is connected to a centrifugal pump 102.

[0036] In operation, domestic sewage undergoes pretreatment through external filtration equipment. After filtering out larger impurities, it enters the sewage tank 1 through the inlet pipe 24 and the first filter cartridge 22 and filter screen 23. At this point, the water level is lower than the bottom of the fixed ring 21. Flocculant is then added to the sewage tank 1. The controller then causes the servo motor 42 to slowly rotate the threaded rod 44, threaded sleeve 45, pressure plate 61, positioning rod 65, L-shaped scraper 81, filter screen 23, and stirring blade 3. The movement allows the flocculant to mix thoroughly with the wastewater, forming uniform flocs that are easy to intercept. At the same time, it prevents the newly formed flocs from adhering to the inner wall of the first filter cartridge 22. After flocculation is completed and the filter is left to settle for a period of time, sludge and impurities will settle in the filter chamber. At this time, the controller causes the two centrifugal pumps 102 to pump the clean water in the wastewater tank 1 out through the drain pipe 101 and into the subsequent treatment equipment. During drainage, the servo motor 42 drives the L-shaped scraper 81 to rotate, which can prevent sludge and impurities from adhering to the inner wall of the first filter cartridge 22 and affecting the drainage efficiency.

[0037] After the clean water in the sewage tank 1 is extracted, the controller causes the servo motor 42 to drive the L-shaped scraper 81 to rotate to the locking position. At this time, the position of the second slot 83 on the L-shaped scraper 81 corresponds to the position of the second slider 72. Then, the controller causes the first electromagnet 51 to attract the first magnet block 53, causing the first slider 52 to disengage from the first slot 46 and squeeze the first spring 54. The controller also causes the second electromagnet 71 to repel and activate the second magnet block 73, causing the second slider 72 to engage with the second slot 83 and stretching the third spring 74, thus fixing the position of the L-shaped scraper 81. After that, the controller causes the servo motor 42 to drive the threaded rod 44 to rotate, causing the threaded sleeve 45 to descend, which in turn causes the pressure plate 61, positioning rod 65, and insertion hole assembly 9 to descend. At this time, the L-shaped scraper 81 can conveniently limit the movement of the positioning rod 65, allowing the pressure plate 61 to work with the first filter cartridge 22 and filter screen 23 to press the sludge and impurities, which can conveniently and quickly reduce the water content of the sludge and impurities and improve work efficiency.

[0038] During the compaction process, the reaction force of the sludge and impurities pushes the slide plate 64 to squeeze the second spring 63, and the pressure is transmitted to the pressure sensor 62 through the second spring 63. The real-time detection by the pressure sensor 62 can easily determine whether the moisture content of the sludge and impurities meets the standards for subsequent treatment. During the descent, the second filter cartridge 92 is gradually inserted into the sludge and impurities. With the cooperation of the fourth spring 95, the sliding column 91, the horizontal plate 93, and the two connecting rods 94, the bottom of the second filter cartridge 92 is tightly attached to the surface of the filter screen 23. This allows the second filter cartridge 92 to separate the sludge and impurities into multiple vertical spaces, forming a three-dimensional drainage path, facilitating the drainage of water from multiple vertical spaces. The direct-space synchronous discharge method, compared to the existing dewatering method using a filter press, avoids local water accumulation and uneven dewatering, thereby improving dewatering efficiency, ensuring that the sludge moisture content quickly reaches the standard, and improving work efficiency and treatment effect. Through the detection of pressure sensor 62, when the moisture content of sludge and impurities reaches the standard for subsequent treatment, the controller causes servo motor 42 to drive threaded rod 44 to rotate, causing threaded sleeve 45 to rise and reset. Then, the sludge and impurities in the filter chamber are grabbed out by an external mechanical gripper. For the remaining sludge and impurities that are difficult to grab out, the user can flush in clean water through external equipment, and then pump them out by an external sludge pump.

[0039] To address the technical problem of difficult cleaning of grease and sludge adhering to the drain pipe 101, as shown in Figures 1-2 and 6-8, the following preferred technical solution is provided: As shown in Figures 2 and 6-8, the cleaning assembly 20 includes two first arc-shaped plates 201 relatively fixedly connected to the bottom of the filter screen 23. Several support rods 202 are fixedly connected inside the sewage tank 1. One end of each support rod 202 is fixedly connected to a protective shell 203. A lifting rod 204 is slidably connected inside the protective shell 203. A second arc-shaped plate 205 is fixedly connected to the top of the lifting rod 204. A third slider 206 is fixedly connected to the outer wall of the lifting rod 204. The third slider 206 is slidably connected to the protective shell 203. A fifth spring 207 is fixedly connected to one side of the third slider 206, and the other end of the fifth spring 207 is fixedly connected to the inner wall of the protective shell 203. Several scraping rings 208 are evenly fixedly connected inside the lifting rod 204. The scraping rings 208 are in contact with the inner wall of the drain pipe 101. Both sides of the scraping rings 208 are provided with inclined surfaces 209. By providing inclined surfaces 209 on both sides of the scraping rings 208, it is possible to reduce the movement resistance of the scraping rings 208 to the scraping rings 208 when the scraping rings 208 reciprocate to clean the inner wall of the drain pipe 101. At the same time, it can guide the scraped sludge to be discharged smoothly along the inclined surfaces 209, thereby improving the cleaning effect.

[0040] As shown in Figures 1-2, 6 and 8, the flushing assembly 30 includes a high-pressure water pump 301 installed on the outer wall of the sewage tank 1. The inlet of the high-pressure water pump 301 is connected to an external water pipe to facilitate the pumping of clean water. The outlet of the high-pressure water pump 301 is connected to an outlet pipe 302, which is connected to two connecting pipes 303. The positions of the two connecting pipes 303 correspond to the drain pipe 101.

[0041] As the filter screen 23 rotates slowly, it drives the two first arc-shaped plates 201 to rotate, which in turn pushes the two second arc-shaped plates 205 to move. This causes the lifting rod 204 to move the third slider 206 and the scraper ring 208, compressing the fifth spring 207 until the two first arc-shaped plates 201 disengage from the two second arc-shaped plates 205. At this point, the elastic force of the fifth spring 207 drives the lifting rod 204 to reset the third slider 206 and the scraper ring 208. This process repeats, facilitating the reciprocating cleaning of the inner walls of the two drain pipes 101. This system effectively prevents sludge and impurities from adhering to and accumulating on the inner wall of the drain pipe 101, thus avoiding blockages. It also ensures that the drain pipe 101 remains unobstructed during the extraction of clean water, guaranteeing stable drainage efficiency. After the clean water extraction is completed, the controller allows external clean water to be pumped through the high-pressure water pump 301, the outlet pipe 302, and the connecting pipe 303 to perform high-pressure flushing on the inner walls of the two drain pipes 101. This effectively removes any remaining dirt after repeated cleaning, preventing cross-contamination of subsequent wastewater treatment processes. Furthermore, it maintains the cleanliness of the inside of the drain pipe 101 and extends the service life of the equipment.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solid-liquid separation device for domestic sewage treatment, comprising a sewage tank (1), wherein a plurality of support legs (11) are fixedly arranged at the bottom of the sewage tank (1), characterized in that: The sewage tank (1) is equipped with a filter assembly (2), which contains a stirring blade (3). A drive assembly (4) is located at the top of the sewage tank (1). Two first snap-fit ​​components (5) are arranged opposite each other inside the drive assembly (4). A pressing component (6) is located at the bottom of the drive assembly (4). Two second snap-fit ​​components (7) are arranged opposite each other inside the filter assembly (2). A scraping component (8) is slidably arranged inside the filter assembly (2). A socket component (9) is located inside the pressing component (6). Two drainage components (10) are located at the bottom of the sewage tank (1). Two cleaning components (20) are arranged opposite each other in the sewage tank (1). The two cleaning components (20) are respectively attached to the inner wall of the two drainage components (10). A flushing component (30) is provided on one side of the sewage tank (1). The filter component (2) includes a fixing ring (21) fixedly connected in the sewage tank (1). A first filter cylinder (22) is fixedly connected to the bottom of the fixing ring (21). A filter screen (23) is rotatably connected to the bottom of the first filter cylinder (22). A stirring blade (3) is fixedly connected to one side of the filter screen (23). A water inlet pipe (24) is provided on one side of the fixing ring (21).

2. The solid-liquid separation device for domestic sewage treatment according to claim 1, characterized in that: The drive assembly (4) includes a U-shaped plate (41) fixedly connected to the top of the sewage tank (1), a servo motor (42) is installed on the top of the U-shaped plate (41), a rectangular shell (43) is fixedly connected to the bottom of the U-shaped plate (41), a threaded rod (44) is fixedly connected to the output end of the servo motor (42), the threaded rod (44) is rotatably connected to the U-shaped plate (41), the threaded rod (44) is threadedly connected to a threaded sleeve (45), the threaded sleeve (45) is slidably connected to the rectangular shell (43), and two first slots (46) are provided opposite to each other on the outer wall of the threaded rod (44).

3. A solid-liquid separation device for domestic sewage treatment according to claim 2, characterized in that: The first snap-fit ​​assembly (5) includes a first electromagnet (51) installed inside the threaded sleeve (45), a first slider (52) slidably connected inside the threaded sleeve (45), a first magnet block (53) installed on one side of the first slider (52), a first spring (54) fixedly connected to one side of the first slider (52), and the other end of the first spring (54) is fixedly connected to the inner wall of the threaded sleeve (45).

4. A solid-liquid separation device for domestic sewage treatment according to claim 2, characterized in that: The pressing assembly (6) includes a pressure plate (61) fixedly connected to the bottom of the threaded sleeve (45). A pressure sensor (62) is installed inside the pressure plate (61). A second spring (63) is fixedly connected to one side of the pressure sensor (62). A slide plate (64) is fixedly connected to one end of the second spring (63). The slide plate (64) is slidably connected to the pressure plate (61). Two positioning rods (65) are connected opposite to each other on the top of the pressure plate (61).

5. A solid-liquid separation device for domestic sewage treatment according to claim 1, characterized in that: The second snap-fit ​​assembly (7) includes a second electromagnet (71) installed inside a fixed ring (21), a second slider (72) slidably connected inside the fixed ring (21), a second magnet block (73) installed on one side of the second slider (72), a third spring (74) fixedly connected to one side of the second slider (72), and the other end of the third spring (74) fixedly connected to the inner wall of the fixed ring (21).

6. A solid-liquid separation device for domestic sewage treatment according to claim 4, characterized in that: The scraping assembly (8) includes an L-shaped scraper (81) that is slidably connected to the outer wall of the positioning rod (65). The L-shaped scraper (81) is fixedly connected to the filter screen (23). A moving block (82) is fixedly connected to one side of the L-shaped scraper (81). The moving block (82) is slidably connected to the fixing ring (21). A second slot (83) is provided on one side of the L-shaped scraper (81).

7. A solid-liquid separation device for domestic sewage treatment according to claim 4, characterized in that: The socket assembly (9) includes several sliding columns (91) that are slidably connected to the pressure plate (61). One end of each sliding column (91) is fixedly connected to a second filter cartridge (92), and the other end of each sliding column (91) is fixedly connected to a horizontal plate (93). Two connecting rods (94) are slidably connected inside the horizontal plate (93). One end of each connecting rod (94) is fixedly connected to the pressure plate (61). A fourth spring (95) is fixedly connected to the bottom of the horizontal plate (93), and one end of the fourth spring (95) is fixedly connected to the pressure plate (61).

8. A solid-liquid separation device for domestic sewage treatment according to claim 1, characterized in that: The drainage assembly (10) includes a drain pipe (101) connected to the bottom of the sewage tank (1), and one end of the drain pipe (101) is connected to a centrifugal pump (102).

9. A solid-liquid separation device for domestic sewage treatment according to claim 8, characterized in that: The cleaning component (20) includes two first arc-shaped plates (201) fixedly connected to the bottom of the filter screen (23). Several support rods (202) are fixedly connected inside the sewage tank (1). One end of the support rod (202) is fixedly connected to a protective shell (203). A lifting rod (204) is slidably connected inside the protective shell (203). A second arc-shaped plate (205) is fixedly connected to the top of the lifting rod (204). A third slider (206) is fixedly connected to the outer wall of the lifting rod (204). The third slider (206) is slidably connected to the protective shell (203). A fifth spring (207) is fixedly connected to one side of the third slider (206), and the other end of the fifth spring (207) is fixedly connected to the inner wall of the protective shell (203). Several scraping rings (208) are evenly fixedly connected inside the lifting rod (204). The scraping rings (208) are in contact with the inner wall of the drain pipe (101). Inclined surfaces (209) are provided on both sides of the scraping rings (208).

10. A solid-liquid separation device for domestic sewage treatment according to claim 1, characterized in that: The flushing assembly (30) includes a high-pressure water pump (301) installed on the outer wall of the sewage tank (1), the outlet end of the high-pressure water pump (301) is connected to an outlet pipe (302), and the outlet pipe (302) is connected to two connecting pipes (303).

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