Municipal domestic sewage treatment device

Abstract

The invention discloses a municipal domestic sewage treatment device, and relates to the technical field of sewage treatment. The municipal domestic sewage treatment device comprises a filter cartridge, a dosing box, a filter, an aeration structure, a Roots blower and an electric control box, a removable solid-liquid separation barrel is arranged in the filter cartridge, meshes are formed in the side wall of the solid-liquid separation barrel, a top plate is fixedly connected to the outer wall of the top of the solid-liquid separation barrel, a transverse moving structure is arranged on one side of the filter cartridge, and the outer wall of the top of the solid-liquid separation barrel is fixedly connected with a bottom plate. A lifting structure is movably arranged on the transverse moving structure, an overturning structure is arranged on the outer wall of the lifting structure, a connecting plate is arranged on one side of the lifting structure, and the overturning structure is connected with the connecting plate. Through the arrangement of transverse moving, lifting and overturning structures and the like, the position and state of the solid-liquid separation barrel can be flexibly adjusted, impurities in the barrel can be conveniently treated, the solid-liquid separation barrel can flexibly move and unload materials, the labor intensity is reduced, and the cleaning efficiency and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to a municipal domestic sewage treatment device. Background Art

[0002] Currently, sewage mainly includes two major types: industrial sewage and domestic sewage. With the acceleration of China's urbanization process, the discharge of municipal domestic sewage has been continuously rising, but the sewage treatment rates in county towns and towns under township jurisdiction are still at a relatively low level. Sewage treatment has become a key link in environmental protection.

[0003] In the process of municipal domestic sewage treatment, solid-liquid separation is the primary and core treatment step, and its effect directly affects the efficiency and quality of subsequent treatment processes. Although existing solid-liquid separation mechanisms can achieve the preliminary separation of solids and liquids in sewage, there are still significant defects: on the one hand, after solid-liquid separation is completed, solid impurities often accumulate in specific parts of the mechanism. As the operation time increases, the accumulation of impurities easily leads to the blockage of the filter screen, reducing the separation efficiency and increasing the frequency and cost of equipment maintenance; on the other hand, most solid-liquid separation mechanisms lack the function of treating solid impurities, and manual cleaning or additional transportation equipment is required, which is time-consuming and laborious. Summary of the Invention

[0004] The purpose of the present invention is to provide a municipal domestic sewage treatment device to solve the technical problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A municipal domestic sewage treatment device includes a filter cylinder, a medicine adding tank, a filter, an aeration structure, a Roots blower, and an electric control box. A collection box is arranged on one side of the filter cylinder. A removable solid-liquid separation cylinder is arranged inside the filter cylinder. The side wall of the solid-liquid separation cylinder is provided with mesh holes. The top outer wall of the solid-liquid separation cylinder is fixedly connected with a top plate. A horizontal movement structure is arranged on one side of the filter cylinder. A lifting structure is movably arranged on the horizontal movement structure. A flipping structure is arranged on the outer wall of the lifting structure. A connecting plate is arranged on one side of the lifting structure. The flipping structure is connected with the connecting plate;

[0006] The top outer wall of the connecting plate is fixedly connected with a motor four. The motor four is connected with the top plate through a rotating shaft. The bottom outer wall of the top plate is fixedly connected with a motor five. The inner wall of the solid-liquid separation cylinder is rotatably connected with a lead screw three. One end of the motor five is connected with the lead screw three. A limiting rod is fixedly connected to the inner wall of the solid-liquid separation cylinder. Pressure plates one and two are arranged on the outer walls of the lead screw three and the limiting rod. The outer walls of the pressure plates one and two are both provided with falling openings.

[0007] Preferably, the horizontal movement structure includes a guide rail. A lead screw one is rotatably connected to the inner wall of the guide rail. A motor one for driving the lead screw one is fixedly connected to the outer wall of one side of the guide rail.

[0008] Preferably, the lifting structure includes a fixed plate, the inner wall of the guide rail is slidably connected to the fixed plate, the outer wall of the screw 1 is threadedly connected to the inner wall of the fixed plate, the inner wall of the fixed plate is provided with a lifting groove, the inner wall of the lifting groove is rotatably connected to the screw 2, the top outer wall of the fixed plate is fixedly connected to the motor 2 that drives the screw 2, the inner wall of the lifting groove is slidably connected to the lifting block, and the outer wall of the screw 2 is threadedly connected to the inner wall of the lifting block.

[0009] Preferably, a connecting plate is fixedly connected to the outer wall of one side of the lifting block, and a flip structure is provided on the lifting block. The flip structure includes a driving gear and a driven gear 1. The outer wall of one side of the lifting block is rotatably connected to the driving gear and the driven gear 1. The driving gear and the driven gear 1 are engaged. The outer wall of the lifting block is fixedly connected to the mounting frame 1, and the outer wall of the mounting frame 1 is fixedly connected to the motor 3 connected to the driving gear.

[0010] Preferably, the rotation of the pressing plate 1 is controlled so that the drop openings on the outer walls of the pressing plate 1 and the pressing plate 2 overlap and intersect.

[0011] Preferably, the outer wall of the lead screw three is threadedly connected to a sleeve, the outer wall of the sleeve is fixedly connected to a mounting frame two, the outer wall of the mounting frame two is fixedly connected to a motor six, the output shaft of the motor six is provided with an incomplete gear, the top outer wall of the pressure plate one is provided with a driven gear two, the incomplete gear is meshed with the driven gear two, and the driven gear two is rotatably connected to the outer wall of the sleeve.

[0012] Preferably, the pressing plate 1 and the pressing plate 2 are slidably connected to the limiting rod, and the inner wall of the pressing plate 2 is threadedly connected to the outer wall of the lead screw 3.

[0013] Preferably, the electrical control box has a built-in PLC controller, which is electrically connected to motor one, motor two, motor three, motor four, motor five, motor six and the Roots blower to automatically control the removal, lifting, flipping and compression operations of the solid-liquid separation cylinder.

[0014] Compared with related technologies, the municipal domestic sewage treatment device provided by the present invention has the following beneficial effects:

[0015] 1. This invention provides a municipal sewage treatment device with a rotatable solid-liquid separation drum, which evenly distributes sewage within the drum and prevents localized accumulation of impurities that could clog the mesh. During rotation, centrifugal force accelerates solid-liquid separation, improving separation efficiency and ensuring continuous and efficient filtration of sewage, ensuring stable operation of subsequent treatment processes.

[0016] 2. The present invention provides a municipal domestic sewage treatment device. The settings of structures such as lateral movement, lifting, and flipping enable the solid-liquid separation cylinder to flexibly adjust its position and state, facilitating the treatment of impurities inside the cylinder. The solid-liquid separation cylinder can flexibly shift to discharge materials, reducing labor intensity and enhancing cleaning efficiency and safety.

[0017] 3. The present invention provides a municipal domestic sewage treatment device. The pressing plate structure inside the cylinder can compress the separated impurities, extrude moisture to reduce volume, lower the subsequent treatment cost, and make the compressed impurities easier to collect and transport, optimizing the overall treatment process.

[0018] 4. The present invention provides a municipal domestic sewage treatment device, which not only achieves efficient solid-liquid separation but also is equipped with a chemical dosing tank, a filter, an aeration structure, etc., enabling in-depth treatment of sewage such as chemical flocculation and biodegradation after solid-liquid separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic structural diagram at the filter cylinder of the present invention;

[0021] Figure 3 is a schematic sectional view at the solid-liquid separation cylinder of the present invention;

[0022] Figure 4 is a schematic structural diagram at the solid-liquid separation cylinder of the present invention;

[0023] Figure 5 is a schematic view at the lifting structure of the present invention;

[0024] Figure 6 is of the present invention Figure 5 schematic structural diagram at position A;

[0025] Figure 7 is a schematic diagram for analyzing the separation of the pressing plate of the present invention;

[0026] Figure 8 is of the present invention Figure 7 magnified schematic structural diagram at position B.

[0027] In the figure: 1. Filter cylinder; 2. Solid-liquid separation cylinder; 201. Mesh holes; 202. Top plate; 3. Transverse movement structure; 301. Guide rail; 302. First lead screw; 303. First motor; 4. Lifting structure; 401. Fixed plate; 402. Lifting groove; 403. Second lead screw; 404. Second motor; 405. Lifting block; 5. Connecting plate; 6. Flipping structure; 601. Driving gear; 602. First driven gear; 603. Connecting shaft; 604. First mounting bracket; 605. Third motor; 7. Fourth motor; 8. Fifth motor; 9. Third lead screw; 10. Limiting rod; 11. First pressing plate; 12. Second pressing plate; 13. Drop opening; 14. Sleeve; 15. Second driven gear; 16. Second mounting bracket; 17. Sixth motor; 18. Incomplete gear; 19. Chemical dosing tank; 20. Filter; 21. Aeration structure; 22. Roots blower; 23. Electric control box; 24. Collection box. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment:

[0030] Please refer to Figures 1-8 , the present invention provides a technical solution: a municipal domestic sewage treatment device, including a filter cylinder 1, a chemical dosing tank 19, a filter 20, an aeration structure 21, a Roots blower 22, and an electric control box 23. A collection box 24 is arranged on one side of the filter cylinder 1. A removable solid-liquid separation cylinder 2 is arranged inside the filter cylinder 1. Mesh holes 201 are opened on the side wall of the solid-liquid separation cylinder 2. The outer wall of the top of the solid-liquid separation cylinder 2 is fixedly connected with a top plate 202. A transverse movement structure 3 is arranged on one side of the filter cylinder 1. A lifting structure 4 is movably arranged on the transverse movement structure 3. A flipping structure 6 is arranged on the outer wall of the lifting structure 4. A connecting plate 5 is arranged on one side of the lifting structure 4. The flipping structure 6 is connected with the connecting plate 5;

[0031] The top outer wall of the connecting plate 5 is fixedly connected with a fourth motor 7. The fourth motor 7 is connected with the top plate 202 through a rotating shaft. The bottom outer wall of the top plate 202 is fixedly connected with a fifth motor 8. The inner wall of the solid-liquid separation cylinder 2 is rotatably connected with a third lead screw 9. One end of the fifth motor 8 is connected with the third lead screw 9. The inner wall of the solid-liquid separation cylinder 2 is fixedly connected with a limiting rod 10. A first pressing plate 11 and a second pressing plate 12 are arranged on the outer walls of the third lead screw 9 and the limiting rod 10. Drop openings 13 are arranged on the outer walls of the first pressing plate 11 and the second pressing plate 12.

[0032] In this embodiment, by designing the solid-liquid separation cylinder 2 to be removable and cooperating with the mesh hole 201 to achieve the solid-liquid separation of sewage, subsequent impurity cleaning and compression can be completed through the cooperation of various structures. The settings of the lateral movement structure 3, the lifting structure 4, and the flipping structure 6 provide power and support for the movement, lifting, and flipping of the solid-liquid separation cylinder 2, facilitating the treatment of impurities in the solid-liquid separation cylinder 2; the chemical dosing tank 19, the filter 20, the aeration structure 21, and the Roots blower 22 can further purify the sewage after solid-liquid separation; the electric control box 23 is used to control the operation of the entire device to achieve automatic operation.

[0033] Among them, the lateral movement structure 3 includes a guide rail 301. A lead screw 302 is rotatably connected to the inner wall of the guide rail 301, and a motor 303 for driving the lead screw 302 is fixedly connected to the outer wall of one side of the guide rail 301.

[0034] Among them, the lifting structure 4 includes a fixing plate 401. The fixing plate 401 is slidably connected to the inner wall of the guide rail 301. The outer wall of the lead screw 302 is threadedly connected to the inner wall of the fixing plate 401. A lifting groove 402 is provided in the inner wall of the fixing plate 401. A lead screw 403 is rotatably connected to the inner wall of the lifting groove 402. A motor 404 for driving the lead screw 403 is fixedly connected to the outer wall of the top of the fixing plate 401. A lifting block 405 is slidably connected to the inner wall of the lifting groove 402. The outer wall of the lead screw 403 is threadedly connected to the inner wall of the lifting block 405.

[0035] In this embodiment, when it is necessary to remove the solid-liquid separation cylinder 2 from the filter cylinder 1 for impurity cleaning, the PLC controller controls the motor 404 to start. The motor 404 drives the lead screw 403 to rotate on the inner wall of the lifting groove 402. Since the inner wall of the lifting block 405 is threadedly connected to the outer wall of the lead screw 403 and is slidably connected to the inner wall of the lifting groove 402, the rotation of the lead screw 403 will drive the lifting block 405 to move up or down along the lifting groove 402 through threaded transmission. Since the lifting block 405 is connected to the solid-liquid separation cylinder 2 through a connecting plate 5, the movement of the lifting block 405 can indirectly drive the solid-liquid separation cylinder 2 to achieve lifting, facilitating the movement of the solid-liquid separation cylinder 2 to a specified height.

[0036] The PLC controller in the electric control box 23 issues an instruction to the motor 303. The motor 303 starts to operate, driving the lead screw 302 to rotate on the inner wall of the guide rail 301. Since the inner wall of the fixing plate 401 is threadedly connected to the outer wall of the lead screw 302 and is slidably connected to the inner wall of the guide rail 301, the rotation of the lead screw 302 will drive the fixing plate 401 to move laterally along the guide rail 301, thereby driving components such as the lifting structure 4 and the solid-liquid separation cylinder 2 connected to the fixing plate 401 to move laterally together.

[0037] Among them, one side outer wall of the lifting block 405 is fixedly connected with a connecting plate 5. A flipping structure 6 is arranged on the lifting block 405. The flipping structure 6 includes a driving gear 601 and a first driven gear 602. One side outer wall of the lifting block 405 is rotatably connected with the driving gear 601 and the first driven gear 602. The driving gear 601 and the first driven gear 602 are meshed. The outer wall of the lifting block 405 is fixedly connected with a first mounting frame 604. The outer wall of the first mounting frame 604 is fixedly connected with a motor three 605 connected to the driving gear 601.

[0038] In this implementation scheme, after the solid-liquid separation cylinder 2 is lifted above the collection box 24, in order to pour the impurities in the cylinder into the collection box 24, the PLC controller controls the motor three 605 to start. The motor three 605 drives the driving gear 601 to rotate. Since the driving gear 601 is meshed with the first driven gear 602, the rotation of the driving gear 601 will drive the first driven gear 602 to rotate synchronously. The first driven gear 602 is fixedly connected with the connecting plate 5 through a connecting shaft 603, and the connecting plate 5 is connected to the solid-liquid separation cylinder 2. Therefore, the rotation of the first driven gear 602 can drive the connecting plate 5 to rotate through the connecting shaft 603, and then indirectly drive the solid-liquid separation cylinder 2 to flip around the connecting shaft 603. When the solid-liquid separation cylinder 2 is flipped to an appropriate angle, the impurities in the cylinder will automatically pour into the collection box 24 under the action of gravity, completing the discharge of the impurities.

[0039] Among them, control the pressing plate one 11 to rotate so that the falling openings 13 on the outer walls of the pressing plate one 11 and the pressing plate two 12 coincide and stagger.

[0040] In this implementation scheme, by controlling the rotation of the pressing plate one 11, the switching between the coincidence and stagger of the falling openings 13 on the outer walls of the pressing plate one 11 and the pressing plate two 12 is realized. When the two falling openings 13 coincide, a through channel is formed, providing an unobstructed path for the falling of sewage and impurities, ensuring the smooth progress of the solid-liquid separation process; and when it is necessary to compress the impurities in the solid-liquid separation cylinder 2, control the pressing plate one 11 to rotate so that the falling openings 13 are staggered. At this time, the two pressing plates are closely connected to form a complete circular sealing structure. This sealing structure provides a stable closed space for the subsequent compression process, effectively preventing the splashing of impurities during the compression process, and ensuring that the pressing plate one 11 and the pressing plate two 12 can fully extrude the impurities to achieve efficient volume reduction.

[0041] Among them, a sleeve 14 is threadedly connected to the outer wall of the lead screw three 9. The outer wall of the sleeve 14 is fixedly connected with a second mounting frame 16. The outer wall of the second mounting frame 16 is fixedly connected with a motor six 17. An output shaft of the motor six 17 is provided with an incomplete gear 18. A second driven gear 15 is arranged on the top outer wall of the pressing plate one 11. The incomplete gear 18 is meshed with the second driven gear 15. The second driven gear 15 is rotatably connected to the outer wall of the sleeve 14.

[0042] Among them, the pressing plate 1 11 and the pressing plate 2 12 are slidably connected to the limiting rod 10, and the inner wall of the pressing plate 2 12 is threadedly connected to the outer wall of the screw 3 9.

[0043] In this embodiment, when it is necessary to compress the impurities in the solid-liquid separation cylinder 2, the PLC controller in the electric control box 23 controls the motor 5 8 to start, and the motor 5 8 drives the screw 3 9 to rotate. Since the inner wall of the pressure plate 2 12 is threadedly connected to the outer wall of the screw 3 9, the rotation of the screw 3 9 will be transmitted through the thread, causing the pressure plate 2 12 to move downward along the screw 3 9. The pressure plate 1 11 and the pressure plate 2 12 are slidably connected to the limit rod 10, and the limit rod 10 plays a guiding and limiting role, ensuring that the pressure plate 1 11 and the pressure plate 2 12 remain stable during the movement and will not deviate or rotate. As the pressure plate 1 11 and the pressure plate 2 12 move downward, the impurities in the solid-liquid separation cylinder 2 are squeezed, the impurities are compressed, the water in the impurities is squeezed out, the volume of the impurities is reduced, and the subsequent cleaning and transportation are convenient.

[0044] Among them, the electrical control box 23 has a built-in PLC controller, which is electrically connected to motor 1 303, motor 2 404, motor 3 605, motor 4 7, motor 5 8, motor 6 17 and Roots blower 22 to realize automatic control of the removal, lifting, flipping and compression operations of the solid-liquid separation cylinder.

[0045] In this implementation scheme, during the entire sewage treatment process, the PLC controller precisely controls each motor and equipment according to the preset program and the signal fed back by the sensor, ensuring that the entire sewage treatment process operates efficiently, stably and automatically.

[0046] Working principle: During municipal domestic sewage treatment operations, sewage is introduced into the solid-liquid separation cylinder 2 through the top inlet. At this time, the drop openings 13 on the outer walls of the pressure plate 1 11 and the pressure plate 2 12 are in an overlapping state, forming a through channel, providing a smooth falling path for the sewage. Under the action of gravity, the sewage seeps out through the mesh 201 on the side wall of the solid-liquid separation cylinder 2, while various impurities are intercepted and retained in the cylinder. Then, the motor 4 7 is started to drive the solid-liquid separation cylinder 2 to rotate at a stable speed, so that the sewage in the cylinder is evenly distributed, effectively avoiding the accumulation of impurities in local areas, preventing the mesh 201 from being blocked, and significantly improving the efficiency and sustainability of solid-liquid separation.

[0047] After the filtration is completed, the motor 6 17 is started, and the motor 6 17 drives the incomplete gear 18 to rotate, and the incomplete gear 18 drives the driven gear 2 15 to rotate, and the driven gear 2 15 drives the pressure plate 1 11 to rotate, and the drop openings 13 on the outer walls of the pressure plates 11 and 2 12 are staggered, and the pressure plates 1 11 and 2 12 form a circular sealing structure, and the motor 5 8 is started to drive the screw 3 9 to rotate, and the screw 3 9 drives the pressure plates 1 11 and 2 12 to move downward to compress the impurities inside the solid-liquid separation cylinder 2. When there are many impurities in the solid-liquid separation cylinder 2, the motor 2 404 is started, and the motor 2 404 drives the screw 2 403 to rotate. The lifting block 405 moves accordingly, and the lifting block 405 indirectly drives the solid-liquid separation cylinder 2 to rise, and then starts the motor 1 303 to drive the screw 1 302 to rotate, and the screw 1 302 drives the lifting structure 4 to move toward the collection box 24. When the solid-liquid separation cylinder 2 moves to above the collection box 24, the motor 3 605 is started, and the motor 3 605 drives the driving gear 601 to rotate, and the driving gear 601 drives the driven gear 1 602 to rotate, and the driven gear 1 602 drives the connecting plate 5 to rotate through the connecting shaft 603, and the connecting plate 5 indirectly drives the solid-liquid separation cylinder 2 to flip, and pours the impurities in the solid-liquid separation cylinder 2 into the collection box 24.

[0048] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A municipal domestic sewage treatment device, comprising a filter cylinder (1), a chemical dosing tank (19), a filter (20), an aeration structure (21), a Roots blower (22), and an electric control box (23), characterized in that: A collection box (24) is provided on one side of the filter cartridge (1). A removable solid-liquid separation cylinder (2) is provided inside the filter cartridge (1). Mesh holes (201) are formed on the side wall of the solid-liquid separation cylinder (2). A top plate (202) is fixedly connected to the outer wall of the top of the solid-liquid separation cylinder (2). A lateral movement structure (3) is provided on one side of the filter cartridge (1). A lifting structure (4) is movably arranged on the lateral movement structure (3). A flipping structure (6) is arranged on the outer wall of the lifting structure (4). A connecting plate (5) is arranged on one side of the lifting structure (4). The flipping structure (6) is connected to the connecting plate (5). A motor four (7) is fixedly connected to the outer wall of the top of the connecting plate (5). The motor four (7) is connected to the top plate (202) through a rotating shaft. A motor five (8) is fixedly connected to the outer wall of the bottom of the top plate (202). A lead screw three (9) is rotatably connected to the inner wall of the solid-liquid separation cylinder (2). One end of the motor five (8) is connected to the lead screw three (9). A limiting rod (10) is fixedly connected to the inner wall of the solid-liquid separation cylinder (2). A pressing plate one (11) and a pressing plate two (12) are arranged on the outer walls of the lead screw three (9) and the limiting rod (10). Drop ports (13) are arranged on the outer walls of the pressing plate one (11) and the pressing plate two (12).

2. The municipal domestic sewage treatment device according to claim 1, characterized in that: The lateral movement structure (3) includes a guide rail (301). A lead screw one (302) is rotatably connected to the inner wall of the guide rail (301). A motor one (303) for driving the lead screw one (302) is fixedly connected to the outer wall of one side of the guide rail (301).

3. The municipal domestic sewage treatment device according to claim 2, characterized in that: The lifting structure (4) includes a fixing plate (401). The fixing plate (401) is slidably connected to the inner wall of the guide rail (301). The outer wall of the lead screw one (302) is threadedly connected to the inner wall of the fixing plate (401). A lifting groove (402) is formed in the inner wall of the fixing plate (401). A lead screw two (403) is rotatably connected to the inner wall of the lifting groove (402). A motor two (404) for driving the lead screw two (403) is fixedly connected to the outer wall of the top of the fixing plate (401). A lifting block (405) is slidably connected to the inner wall of the lifting groove (402). The outer wall of the lead screw two (403) is threadedly connected to the inner wall of the lifting block (405).

4. The municipal domestic sewage treatment device according to claim 3, characterized in that: A connecting plate (5) is fixedly connected to the outer wall of one side of the lifting block (405). A flipping structure (6) is arranged on the lifting block (405). The flipping structure (6) includes a driving gear (601) and a driven gear one (602). The driving gear (601) and the driven gear one (602) are rotatably connected to the outer wall of one side of the lifting block (405). The driving gear (601) and the driven gear one (602) are meshed. An installation frame one (604) is fixedly connected to the outer wall of the lifting block (405). A motor three (605) connected to the driving gear (601) is fixedly connected to the outer wall of the installation frame one (604).

5. A municipal domestic sewage treatment device according to claim 1, characterized in that: Control the rotation of the pressing plate one (11) to make the drop ports (13) on the outer walls of the pressing plate one (11) and the pressing plate two (12) coincide and stagger.

6. The municipal domestic sewage treatment device according to claim 1, characterized in that: The outer wall of the lead screw 3 (9) is threadedly connected to a sleeve (14), the outer wall of the sleeve (14) is fixedly connected to a mounting frame 2 (16), the outer wall of the mounting frame 2 (16) is fixedly connected to a motor 6 (17), the output shaft of the motor 6 (17) is provided with an incomplete gear (18), the top outer wall of the pressure plate 1 (11) is provided with a driven gear 2 (15), the incomplete gear (18) is meshed with the driven gear 2 (15), and the driven gear 2 (15) is rotatably connected to the outer wall of the sleeve (14).

7. A municipal domestic sewage treatment device according to claim 6, characterized in that: The pressure plate 1 (11) and the pressure plate 2 (12) are slidably connected to the limit rod (10), and the inner wall of the pressure plate 2 (12) is threadedly connected to the outer wall of the lead screw 3 (9).

8. A municipal domestic sewage treatment device according to claim 4, characterized in that: The electric control box (23) has a built-in PLC controller, which is electrically connected to motor 1 (303), motor 2 (404), motor 3 (605), motor 4 (7), motor 5 (8), motor 6 (17) and Roots blower (22) to realize automatic control of the removal, lifting, flipping and compression operations of the solid-liquid separation cylinder.

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