Domestic sewage treatment equipment for municipal water supply and drainage

Abstract

The invention discloses domestic sewage treatment equipment for municipal water supply and drainage, and relates to the technical field of sewage treatment.The domestic sewage treatment equipment comprises a treatment box, the treatment box is sequentially provided with a first-stage pool, a second-stage pool and a third-stage pool, the first-stage pool is used for filtering sewage, the second-stage pool is used for biologically treating the sewage, and the third-stage pool is used for biologically treating the sewage; the third-stage tank is used for carrying out advanced treatment on sewage, through grooves are formed in the side walls of the first-stage tank, the second-stage tank and the third-stage tank, and the bottoms of the second-stage tank and the third-stage tank are inverted trapezoids. The sewage treatment device has the advantages that sediments in the first-stage tank, the second-stage tank and the third-stage tank can be automatically collected and cleaned in a unified mode, the situation that the cleaning effect is poor due to the fact that the sediments suspend again in the cleaning process is avoided, meanwhile, the collected sediments can be collected after being dehydrated, and the follow-up treatment difficulty and the waste problem of water resources are greatly reduced.

Description

Technical Field

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

[0002] Municipal water supply and drainage is an important part of urban infrastructure, including a water supply system and a drainage system. The drainage system is responsible for collecting urban sewage and rainwater, and by treating the sewage, the utilization rate of water resources is improved. Currently, common domestic sewage treatment usually adopts a multi-stage treatment method. After the drainage system roughly filters domestic sewage, it is transported to a treatment device for subsequent treatment.

[0003] After the existing sewage treatment device is used for a period of time, due to the existence of sediment such as sand, the water circulation will be reduced, resulting in a decrease in the overall treatment efficiency. Therefore, it is necessary to regularly clean the sediment. However, the process of cleaning the sediment will stir the water body, causing some sediment to suspend in the water body again, affecting the overall cleaning effect. Moreover, the moisture content of the cleaned sediment is relatively high, and it needs to be dehydrated first before other treatments during subsequent treatment, which is difficult. At the same time, the dehydrated water cannot be directly recycled, easily causing the problem of water resource waste. Therefore, it is necessary to design a domestic sewage treatment device for municipal water supply and drainage. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a domestic sewage treatment device for municipal water supply and drainage, which solves the problems raised in the above background art.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A domestic sewage treatment device for municipal water supply and drainage includes a treatment tank. The treatment tank is successively provided with a primary tank, a secondary tank, and a tertiary tank. The primary tank is used for filtering sewage, the secondary tank is used for biological treatment of sewage, and the tertiary tank is used for advanced treatment of sewage. Through grooves are provided on the side walls of the primary tank, the secondary tank, and the tertiary tank. The bottoms of the secondary tank and the tertiary tank are both inverted trapezoids;

[0007] A filter cylinder is arranged in the primary tank, and a water inlet pipe is fixedly installed on the filter cylinder. A fixing frame is fixedly installed on the filter cylinder. A hydraulic cylinder is fixedly installed on the side wall of the treatment tank, and the output end of the hydraulic cylinder is fixedly connected to the fixing frame. A lead screw one is rotatably installed in the filter cylinder, and a push plate is threadedly connected to the lead screw one. One end of the filter cylinder close to the secondary tank is installed with a bottom plate through a clamping component. A sludge receiving plate matched with the filter cylinder is slidably installed on the treatment tank;

[0008] The bottoms of the secondary pool and the tertiary pool are respectively fixedly communicated with a first extraction pipe and a second extraction pipe. A pump body is fixedly installed on the side wall of the treatment tank, and the pump body is fixedly communicated with both the first extraction pipe and the second extraction pipe. A delivery pipe is fixedly communicated between the pump body and the water inlet pipe.

[0009] Flow meters are installed in both the water inlet pipe and the multiple through slots. An electromagnetic valve is installed at one end of the water inlet pipe away from the filter cylinder. A controller is fixedly installed on the side wall of the treatment tank, and the input end of the controller is electrically connected to the multiple flow meters. The output end of the controller is electrically connected to the electromagnetic valve, the hydraulic cylinder, and the pump body.

[0010] Furthermore, the through slots are arranged to be inclined downward from the end close to the water inlet pipe to the end away from the water inlet pipe. One end of the water inlet pipe close to the filter cylinder and one end of the delivery pipe close to the pump body are both corrugated pipes.

[0011] Furthermore, guiding grooves are formed on the inner wall of the filter cylinder. Guiding blocks are fixedly installed on the side wall of the pushing plate and are matched with the guiding grooves. Two fixing blocks are fixedly installed on the treatment tank, and a third lead screw is rotatably installed between the two fixing blocks. A support rod fixedly connected to the mud receiving plate is threadedly connected to the third lead screw.

[0012] Furthermore, a second lead screw is rotatably installed on the fixing frame, and a moving ring is threadedly installed on the second lead screw. Multiple scraping strips are fixedly installed on the inner wall of the moving ring.

[0013] Furthermore, a first rack is fixedly installed at one end of the primary pool away from the secondary pool. A first gear is fixedly installed at one end of the first lead screw located outside the filter cylinder. A second gear is fixedly installed on the second lead screw, and both the second gear and the first gear are meshed with the first rack.

[0014] Furthermore, a fourth gear is fixedly installed on the third lead screw. A third rack matched with the fourth gear is fixedly installed on the side wall of the filter cylinder. The initial distance between the third rack and the fourth gear is greater than the radius of the filter cylinder.

[0015] Furthermore, the clamping assembly is composed of a slider, a chute, an arc-shaped groove, a sealing ring, a T-shaped groove, a connecting rod, and a tension spring. The sealing ring is rotatably installed on the bottom plate in a sealed manner. Multiple sliders are fixedly installed on the side wall of the bottom plate. Multiple chutes matched with the corresponding sliders are formed on the inner wall of the filter cylinder, and arc-shaped grooves matched with the corresponding sliders are formed on the bottom wall of each chute. Multiple connecting rods are fixedly installed on the side wall of the sealing ring. Multiple T-shaped grooves slidably matched with the corresponding connecting rods are formed on the side wall of the filter cylinder, and a tension spring is installed between each T-shaped groove and the corresponding connecting rod.

[0016] Further, a third gear is fixedly installed at one end of the bottom plate away from the filter cylinder, a second rack is fixedly installed at one end of the first-level tank close to the second-level tank, and the second rack and the third rack are shorter than the first rack in length, and the length of the first rack is greater than twice the diameter of the filter cylinder.

[0017] Further, discharge ports are formed on the side walls of the first-level tank, the second-level tank, and the third-level tank, and a sealing plug is threadedly connected to each discharge port.

[0018] Further, a groove is formed on the inner wall of the filter cylinder, and an inner cylinder is rotatably and sealingly installed on the groove. A plurality of alignment holes are formed on the side wall of the inner cylinder, and each alignment hole corresponds to the position of the corresponding filter hole on the filter cylinder. An installation ring is installed on the first lead screw through a damping bearing, and a plurality of support rods are fixedly installed between the installation ring and the inner cylinder.

[0019] Further, a rotating ring is rotatably and sealingly installed at one end of the push plate close to the bottom plate, a guiding push block is fixedly installed on the inner wall of the rotating ring and is matched with the thread groove on the first lead screw, a fixing ring is fixedly installed at one end of the rotating ring away from the push plate, and a cleaning brush is fixedly installed on the inner wall of the fixing ring and is matched with a plurality of first lead screws.

[0020] Compared with the existing technology, the advantages of the present invention are as follows:

[0021] 1: Through the design of the filter cylinder, during the primary treatment of domestic sewage, the sediment can be effectively intercepted and collected, preventing the sediment from flowing into the second-level tank and the third-level tank, improving the primary treatment effect, and facilitating the subsequent unified cleaning of the sediment, avoiding the problem that the sediment is resuspended in the water body during the cleaning process, resulting in poor cleaning effect.

[0022] 2: Through the cooperation of the first extraction pipe, the second extraction pipe, and the conveying pipe, when cleaning the sediment in the filter cylinder, the sediment in the second-level tank and the third-level tank can be transported to the filter cylinder at the same time, so that the sediment in the equipment can be uniformly treated at one time, greatly improving the cleaning efficiency.

[0023] 3: Through the cooperation of the push plate and the moving ring, the sediment in the filter cylinder can be piled up and dehydrated, and the filter cylinder can be unclogged during the treatment process, ensuring the drainage effect of the filter cylinder, ensuring the normal operation of the dehydration treatment of the sediment, effectively reducing the subsequent treatment difficulty of the sediment and reducing the waste of water resources.

[0024] 4: Through the cooperation of the mud receiving plate and the clamping assembly, the connection relationship between the bottom plate and the filter cylinder can be switched by using the position change of the filter cylinder, realizing the automatic collection of the dehydrated sediment, avoiding the problem that the sediment falls into the water body again, resulting in poor cleaning effect.

[0025] In summary, the present invention can automatically gather the sediments in the primary tank, secondary tank, and tertiary tank and conduct unified cleaning, avoiding the poor cleaning effect caused by the resuspension of sediments during the cleaning process. At the same time, the gathered sediments can be dehydrated and collected, greatly reducing the subsequent treatment difficulty and the problem of water resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is a schematic structural diagram of a domestic sewage treatment device for municipal water supply and drainage proposed by the present invention;

[0027] Figure 2 is Figure 1 a schematic structural diagram from another perspective;

[0028] Figure 3 is Figure 1 a schematic diagram of the structure at the treatment tank in FIG.

[0029] Figure 4 is Figure 1 a schematic diagram of the structure at the treatment tank after removal;

[0030] Figure 5 is Figure 3 a schematic structural diagram from another perspective;

[0031] Figure 6 is Figure 4 a schematic structural diagram from another perspective;

[0032] Figure 7 is Figure 4 a schematic exploded view of the structure of FIG.

[0033] Figure 8 is Figure 7 a schematic diagram of another perspective of the structure at the filter cartridge in FIG.

[0034] Figure 9 is Figure 7 a schematic diagram of another perspective of the structure at the moving ring in FIG.

[0035] Figure 10 FIG. is a schematic structural diagram of Embodiment 2 of a domestic sewage treatment device for municipal water supply and drainage proposed by the present invention;

[0036] Figure 11 is Figure 10 a schematic enlarged view of the internal structure of the inner cylinder in FIG.

[0037] Figure 12 is Figure 11 a schematic diagram of the structure after removing the first lead screw and the push plate.

[0038] In the figure: 1, treatment tank; 2, primary tank; 3, secondary tank; 4, tertiary tank; 5, through groove; 6, filter cartridge; 7, water inlet pipe; 8, fixing frame; 9, hydraulic cylinder; 10, first lead screw; 11, push plate; 12, second lead screw; 13, moving ring; 14, scraping strip; 15, first rack; 16, first gear; 17, bottom plate; 18, slider; 19, chute; 20, arc groove; 21, sealing ring; 22, T-shaped groove; 23, connecting rod; 24, third gear; 25, second rack; 26, third lead screw; 27, mud receiving plate; 28, fourth gear; 29, third rack; 30, pump body; 31, first extraction pipe; 32, second extraction pipe; 33, conveying pipe; 34, sealing plug; 35, groove; 36, inner cylinder; 37, alignment hole; 38, limit block; 39, mounting ring; 40, support rod; 41, rotating ring; 42, guiding push block; 43, fixing ring; 44, cleaning brush. Detailed implementation mode

[0039] Example 1:

[0040] Refer to Figures 1 - 9 , a domestic sewage treatment device for municipal water supply and drainage, including a treatment tank 1. A primary tank 2, a secondary tank 3, and a tertiary tank 4 are successively opened on the treatment tank 1. The primary tank 2 is used for filtering sewage, the secondary tank 3 is used for biological treatment of sewage, and the tertiary tank 4 is used for advanced treatment of sewage. For example, the purpose of biological treatment is to remove organic matter in sewage. Currently, common treatment methods include the activated sludge method, the biofilm method, and the A / O process. The specific usage method is not described in detail here. The purpose of advanced treatment is to further remove pollutants that cannot be removed by secondary treatment. By adding a coagulant, colloids and suspended solids in the sewage form larger particles and settle. It can also include using methods such as sodium hypochlorite, chlorine dioxide, ozone, or ultraviolet light to kill pathogenic microorganisms in the sewage, so that the sewage meets higher discharge standards or reuse standards. This is also prior art, so it is not elaborated in detail here.

[0041] Through grooves 5 are opened on the side walls of the primary tank 2, the secondary tank 3, and the tertiary tank 4. Through the setting of the through grooves 5, the water body can automatically flow along the primary tank 2, the secondary tank 3, and the tertiary tank 4. The heights of the through grooves 5 on the primary tank 2, the secondary tank 3, and the tertiary tank 4 decrease in sequence. The through groove 5 is inclined downward from the end close to the water inlet pipe 7 to the end far from the water inlet pipe 7. The settings of the height and inclination angle of the through groove 5 can effectively avoid the problem of reverse backflow of the water body.

[0042] A filter cartridge 6 is arranged in the primary pool 2, and a water inlet pipe 7 is fixedly installed on the filter cartridge 6. The water inlet pipe 7 is used to transport the domestic sewage after coarse filtration into the interior of the filter cartridge 6. After that, under the interception of the filter cartridge 6, the sediment and precipitate in the sewage are retained in the filter cartridge 6, and the water body accumulates in the primary pool 2. When the water volume in the primary pool 2 accumulates to a certain height, it flows through the through groove 5 into the secondary pool 3 for biological treatment. Then, the water body in the secondary pool 3 enters the tertiary pool 4 for advanced treatment, and the water body after advanced treatment is discharged from the tertiary pool 4. The filter cartridge 6 is provided with filter holes by itself. By limiting the size of the filter holes on it, impurities and precipitates are retained in the filter cartridge 6.

[0043] Discharge ports are provided on the side walls of the primary pool 2, the secondary pool 3, and the tertiary pool 4, and a sealing plug 34 is threadedly connected to each discharge port. After using the equipment for a certain period of time, the sealing plug 34 can be opened to discharge all the water bodies in the primary pool 2, the secondary pool 3, and the tertiary pool 4. Then, effective cleaning and disinfection treatments can be carried out on the primary pool 2, the secondary pool 3, and the tertiary pool 4 to ensure the long-term use effect of the equipment.

[0044] Flow meters are installed in the water inlet pipe 7 and multiple through grooves 5. The flow meters are used to detect the water inflow and the water outflow of each through groove 5. According to the changes in the water inflow and the water outflow, the degree of blockage of the filter cartridge 6 (i.e., the content of sediment in the filter cartridge 6) can be known. An electromagnetic valve is installed at the end of the water inlet pipe 7 away from the filter cartridge 6, and the electromagnetic valve is used to control the opening and closing of the water inlet pipe 7.

[0045] A fixing frame 8 is fixedly installed on the filter cartridge 6, and a hydraulic cylinder 9 is fixedly installed on the side wall of the treatment tank 1. The output end of the hydraulic cylinder 9 is fixedly connected to the fixing frame 8. When there is a large amount of sediment in the filter cartridge 6, resulting in a poor water flow rate, the hydraulic cylinder 9 is started to lift the filter cartridge 6 outside the primary pool 2, and then the filter cartridge 6 can be unblocked.

[0046] A lead screw 10 is rotatably installed in the filter cartridge 6, and a push plate 11 is threadedly connected to the lead screw 10. Guide grooves are provided on the inner wall of the filter cartridge 6, and guide blocks are fixedly installed on the side wall of the push plate 11 and are matched with the guide grooves. The cooperation of the guide grooves and the guide blocks is a prior art, and its purpose is to limit the moving direction of the push plate 11 in the filter cartridge 6. When the lead screw 10 rotates, the push plate 11 can be moved in the filter cartridge 6, so as to push the sediment and extrude and dehydrate it.

[0047] The bottoms of the secondary pool 3 and the tertiary pool 4 are both inverted trapezoids. The bottoms of the secondary pool 3 and the tertiary pool 4 are respectively fixedly connected with a first extraction pipe 31 and a second extraction pipe 32. A pump body 30 is fixedly installed on the side wall of the treatment tank 1, and the pump body 30 is fixedly connected with both the first extraction pipe 31 and the second extraction pipe 32. A delivery pipe 33 is fixedly connected between the pump body 30 and the water inlet pipe 7. The first extraction pipe 31 and the second extraction pipe 32 are both connected to the water inlet end of the pump body 30, and the delivery pipe 33 is connected to the water outlet end of the pump body 30. When the filter cylinder 6 is lifted out of the primary pool 2, the pump body 30 operates simultaneously, so that the sediment deposited at the bottoms of the secondary pool 3 and the tertiary pool 4 can be extracted, and the sediment is transported into the filter cylinder 6 by the delivery pipe 33, realizing the unified treatment of the sediment inside the equipment. By adjusting the power and running time of the pump body 30, the extraction volume can be controlled, and thus the effective extraction of the sediment in the secondary pool 3 and the tertiary pool 4 can be achieved.

[0048] One end of the water inlet pipe 7 close to the filter cylinder 6 and one end of the delivery pipe 33 close to the pump body 30 are both corrugated pipes. The design of the corrugated pipes can ensure the connection effect of the delivery pipe 33 and the water inlet pipe 7 when the filter cylinder 6 moves up and down relative to the primary pool 2, avoiding movement interference.

[0049] A controller is fixedly installed on the side wall of the treatment tank 1. The input end of the controller is electrically connected to a plurality of flow meters, and the output end of the controller is electrically connected to the solenoid valve, the hydraulic cylinder 9 and the pump body 30. Through the design of the controller, the operation of the solenoid valve, the hydraulic cylinder 9 and the pump body 30 can be automatically controlled according to the flow rate change of the flow meters, realizing the automatic cleaning treatment of the equipment. The controller, the solenoid valve, the flow meters, the hydraulic cylinder 9 and the pump body 30 can all adopt existing products, and their working principles and specific structures are not elaborated here. Among them, the pump body 30 is a pump used for extracting sludge.

[0050] A second lead screw 12 is rotatably installed on the fixing frame 8, and a moving ring 13 is threadedly installed on the second lead screw 12. A plurality of scraping strips 14 are fixedly installed on the inner wall of the moving ring 13. Through the cooperation of the second lead screw 12 and the moving ring 13, the filter holes on the filter cylinder 6 can be cleaned during the process of lifting the filter cylinder 6 out of the primary pool 2, ensuring that the water in the filter cylinder 6 can be discharged smoothly.

[0051] One end of the first - stage pool 2 far from the second - stage pool 3 is fixedly installed with a first rack 15. One end of the first lead screw 10 located outside the filter cylinder 6 is fixedly installed with a first gear 16. A second gear is fixedly installed on the second lead screw 12, and both the second gear and the first gear 16 are meshed with the first rack 15. Through the cooperation of the first gear 16, the second gear and the first rack 15, the up - and - down movement of the filter cylinder 6 relative to the first - stage pool 2 can be used to automatically control the rotation of the first lead screw 10 and the second lead screw 12, so as to realize the movement of the push plate 11 and the moving ring 13 relative to the filter cylinder 6. The specific operation is as follows: when the filter cylinder 6 moves upward, the first lead screw 10 and the second lead screw 12 rotate simultaneously, so that the push plate 11 and the moving ring 13 move simultaneously towards the end close to the second - stage pool 3. And the moving ring 13 is arranged at the end of the push plate 11 close to the second - stage pool 3. Therefore, when the two move, the scraping strip 14 can first clear the blockage of the filter cylinder 6 itself. Then, the push plate 11 pushes the sediment towards the end close to the second - stage pool 3, and the water body in the filter cylinder 6 falls into the first - stage pool 2. Since the set heights of the first gear 16 and the second gear are different, the meshing times of the two with the first rack 15 are different. By setting the thread lead and length of the first lead screw 10 and the second lead screw 12, the push plate 11 and the moving ring 13 can move at the same moving speed, thus ensuring the blockage clearing of the filter cylinder 6, the pushing of the sediment, and the dehydration effect.

[0052] One end of the filter cylinder 6 close to the second - stage pool 3 is installed with a bottom plate 17 through a clamping component. The clamping component is composed of a slider 18, a sliding groove 19, an arc - shaped groove 20, a sealing ring 21, a T - shaped groove 22, a connecting rod 23 and a tension spring. The sealing ring 21 is rotatably installed on the bottom plate 17 in a sealed manner. A plurality of sliders 18 are fixedly installed on the side wall of the bottom plate 17. A plurality of sliding grooves 19 matching the corresponding sliders 18 are opened on the inner wall of the filter cylinder 6, and an arc - shaped groove 20 matching the corresponding slider 18 is opened on the bottom wall of each sliding groove 19. A plurality of connecting rods 23 are fixedly installed on the side wall of the sealing ring 21. A plurality of T - shaped grooves 22 slidably matched with the corresponding connecting rods 23 are opened on the side wall of the filter cylinder 6, and a tension spring is installed between each T - shaped groove 22 and the corresponding connecting rod 23. When the filter cylinder 6 is located in the first - stage pool 2, the slider 18 is located in the arc - shaped groove 20. At this time, the bottom plate 17 is in a non - movable state relative to the filter cylinder 6, and the elastic force of the tension spring makes the bottom plate 17 stably fit on the end of the filter cylinder 6 close to the second - stage pool 3. When the bottom plate 17 rotates relative to the filter cylinder 6 such that the slider 18 moves from the arc - shaped groove 20 to be opposite to the sliding groove 19, the bottom plate 17 and the filter cylinder 6 are in a movable state. At this time, using the pushing effect of the push plate 11, the bottom plate 17 can be separated from the filter cylinder 6, and the sediment accumulated in the filter cylinder 6 can be discharged.

[0053] One end of the bottom plate 17 away from the filter cylinder 6 is fixedly installed with a third gear 24. One end of the first-stage tank 2 close to the second-stage tank 3 is fixedly installed with a second rack 25 that cooperates with the third gear 24. The length of the first rack 15 is greater than twice the diameter of the filter cylinder 6. Through the cooperation of the third gear 24 and the second rack 25, after the filter cylinder 6 moves up a certain extent, the bottom plate 17 can automatically rotate relative to the filter cylinder 6 to release the limitation on the bottom plate 17.

[0054] A sludge receiving plate 27 that cooperates with the filter cylinder 6 is slidably installed on the treatment tank 1. Two fixing blocks are fixedly installed on the treatment tank 1, and a third screw rod 26 is rotatably installed between the two fixing blocks. A support rod fixedly connected to the sludge receiving plate 27 is threadedly connected to the third screw rod 26. Through the cooperation of the third screw rod 26 and the support rod, the sludge receiving plate 27 can be driven to move on the treatment tank 1. Therefore, when the filter cylinder 6 moves out of the treatment tank 1, the sludge receiving plate 27 moves to the lower end of the filter cylinder 6, so that the sediment pushed out of the filter cylinder 6 by the push plate 11 subsequently can be collected, preventing it from falling back into the first-stage tank 2 again. To ensure the smooth movement of the sludge receiving plate 27 relative to the treatment tank 1, a limiting mechanism can be provided between the sludge receiving plate 27 and the treatment tank 1. For example, an L-shaped rod is provided at the bottom of the sludge receiving plate 27, and a horizontal groove slidably matched with the L-shaped rod is provided on the side wall of the second-stage tank 3. The design of the limiting mechanism is prior art, so it is not shown in the figure.

[0055] A fourth gear 28 is fixedly installed on the third screw rod 26. A third rack 29 that cooperates with the fourth gear 28 is fixedly installed on the side wall of the filter cylinder 6. The initial distance between the third rack 29 and the fourth gear 28 is greater than the radius of the filter cylinder 6. The sum of the lengths of the second rack 25 and the third rack 29 is less than the length of the first rack 15. Through the cooperation of the fourth gear 28 and the third rack 29, when half of the filter cylinder 6 moves out of the first-stage tank 2, the third screw rod 26 automatically rotates, causing the sludge receiving plate 27 to approach the filter cylinder 6. Subsequently, as the filter cylinder 6 continues to move up, the sludge receiving plate 27 moves to the bottom of the filter cylinder 6. By setting the initial distance between the third rack 29 and the fourth gear 28 and the lead of the thread of the third screw rod 26, the movement of the sludge receiving plate 27 approaching the filter cylinder 6 will not cause movement interference to the upward movement of the filter cylinder 6.

[0056] Through the set positions of the first rack 15, the second rack 25, and the third rack 29, when the filter cartridge 6 moves upward, the push plate 11 and the moving ring 13 are first moved. When half of the filter cartridge 6 is removed from the primary tank 2, the mud receiving plate 27 is moved closer to the filter cartridge 6. At this time, the moving distance of the push plate 11 inside the filter cartridge 6 is less than half of the length of the filter cartridge 6. Therefore, the sediment is only accumulated and not dehydrated. At this time, the bottom plate 17 rotates relative to the filter cartridge 6 and switches to a movable state. When the filter cartridge 6 is completely removed from the primary tank 2, it continues to move so that the mud receiving plate 27 is located at the bottom of the filter cartridge 6. At the same time, the moving ring 13 stops moving, and the push plate 11 continues to move to squeeze and dehydrate the accumulated sediment. When the sediment is squeezed and the push plate 11 continues to move, the thrust received by the bottom plate 17 is greater than the elastic force of the tension spring. At this time, the bottom plate 17 is separated from the filter cartridge 6. Subsequently, the dehydrated sediment falls on the mud receiving plate 27. After the dehydration and discharge of the sediment are completed, the filter cartridge 6 moves downward to reset. At this time, the mud receiving plate 27 resets to avoid interfering with the downward movement of the filter cartridge 6. Then, the moving ring 13 and the push plate 11 also reset accordingly. At the same time, the bottom plate 17 fits against the filter cartridge 6 under the elastic force of the tension spring and rotates in the opposite direction as the filter cartridge 6 continues to move downward and switches to an immovable state.

[0057] Embodiment 2:

[0058] Referring to Figures 10 - 12 , a groove 35 is formed on the inner wall of the filter cartridge 6, and an inner cylinder 36 is rotatably installed in a sealed manner on the groove 35. A plurality of alignment holes 37 are formed on the side wall of the inner cylinder 36, and each alignment hole 37 corresponds to the position of the corresponding filter hole on the filter cartridge 6. When the inner cylinder 36 rotates in the groove 35, the actual size of the filter hole can be adjusted by using the position deviation of the alignment hole 37 relative to the filter hole. Therefore, when dehydrating impurities, the size of the filter hole can be reduced, thereby avoiding the problem that impurities are discharged from the filter hole outside the filter cartridge 6 under pressure and re-entering the primary tank 2. A plurality of limiting blocks 38 are fixedly installed on the side wall of the inner cylinder 36, and a plurality of limiting grooves are formed on the inner wall of the groove 35 and are matched with the corresponding limiting blocks 38. The cooperation between the limiting blocks 38 and the limiting grooves is used to limit the rotation amplitude of the inner cylinder 36 in the groove 35. Specifically, by limiting the included angle at both ends of the limiting groove, the included angle of the limiting groove is made smaller than the included angle of a single alignment hole 37 on the inner cylinder 36, so that the inner cylinder 36 can adjust the size of the filter hole when rotating in the groove 35, and the problem that the filter hole is completely closed and the water in the filter cartridge 6 cannot be discharged will not occur.

[0059] An installation ring 39 is installed on the first lead screw 10 through a damping bearing, and a plurality of support rods 40 are fixedly installed between the installation ring 39 and the inner cylinder 36. When the first lead screw 10 rotates, through the cooperation of the damping bearing and the installation ring 39, the inner cylinder 36 can be driven to rotate in the groove 35 simultaneously. When the inner cylinder 36 rotates to the maximum angle, the inner cylinder 36 cannot rotate. At this time, the damping bearing enables the first lead screw 10 to drive the installation ring 39 to rotate simultaneously, avoiding motion interference.

[0060] A rotating ring 41 is hermetically and rotatably installed at one end of the push plate 11 close to the bottom plate 17, and a guiding push block 42 that cooperates with the thread groove on the first lead screw 10 is fixedly installed on the inner wall of the rotating ring 41. A fixing ring 43 is fixedly installed at one end of the rotating ring 41 away from the push plate 11, and a cleaning brush 44 that cooperates with a plurality of first lead screws 10 is fixedly installed on the inner wall of the fixing ring 43. When the first lead screw 10 rotates, the push plate 11 moves in the filter cylinder 6. At this time, the push plate 11 drives the rotating ring 41 to move along the first lead screw 10 simultaneously. Due to the cooperation of the guiding push block 42 and the thread groove on the first lead screw 10, the rotating ring 41 will rotate simultaneously during the movement, and the guiding push block 42 can also scrape out some impurities accumulated in the thread groove on the first lead screw 10 to ensure the threaded connection effect between the first lead screw 10 and the push plate 11. When the rotating ring 41 rotates, it drives the fixing ring 43 to rotate simultaneously. At this time, the cleaning brush 44 can clean the whole first lead screw 10. The cleaning brush 44 is specifically made of flexible bristles.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A domestic sewage treatment device for municipal water supply and drainage, comprising a treatment tank (1), characterized in that, A primary pool (2), a secondary pool (3), and a tertiary pool (4) are successively formed on the treatment tank (1). A filter cylinder (6) is arranged in the primary pool (2), and a water inlet pipe (7) is fixedly installed on the filter cylinder (6). A fixing frame (8) is fixedly installed on the filter cylinder (6). A hydraulic cylinder (9) is fixedly installed on the side wall of the treatment tank (1), and the output end of the hydraulic cylinder (9) is fixedly connected to the fixing frame (8). A first lead screw (10) is rotatably installed in the filter cylinder (6), and a push plate (11) is threadedly connected to the first lead screw (10). One end of the filter cylinder (6) close to the secondary pool (3) is installed with a bottom plate (17) through a clamping component. A sludge receiving plate (27) matched with the filter cylinder (6) is slidably installed on the treatment tank (1). The bottoms of the secondary pool (3) and the tertiary pool (4) are respectively fixedly communicated with a first extraction pipe (31) and a second extraction pipe (32). A pump body (30) is fixedly installed on the side wall of the treatment tank (1), and the pump body (30) is fixedly communicated with both the first extraction pipe (31) and the second extraction pipe (32). A delivery pipe (33) is fixedly communicated between the pump body (30) and the water inlet pipe (7).

2. The domestic sewage treatment equipment for municipal water supply and drainage according to claim 1, characterized in that Through grooves (5) are formed on the side walls of the primary pool (2), the secondary pool (3), and the tertiary pool (4). The through grooves (5) are inclined downward from the end close to the water inlet pipe (7) to the end far from the water inlet pipe (7). One end of the water inlet pipe (7) close to the filter cylinder (6) and one end of the delivery pipe (33) close to the pump body (30) are both corrugated pipes.

3. A domestic sewage treatment device for municipal water supply and drainage according to claim 1, characterized in that, A guiding groove is formed on the inner wall of the filter cylinder (6). A guiding block matched with the guiding groove is fixedly installed on the side wall of the push plate (11). Two fixing blocks are fixedly installed on the treatment tank (1), and a third lead screw (26) is rotatably installed between the two fixing blocks. A support rod fixedly connected to the sludge receiving plate (27) is threadedly connected to the third lead screw (26).

4. A domestic sewage treatment device for municipal water supply and drainage according to claim 3, characterized in that, A second lead screw (12) is rotatably installed on the fixing frame (8), and a moving ring (13) is threadedly installed on the second lead screw (12). A plurality of scraping bars (14) are fixedly installed on the inner wall of the moving ring (13).

5. A domestic sewage treatment device for municipal water supply and drainage according to claim 4, characterized in that, A first rack (15) is fixedly installed at one end of the primary pool (2) far from the secondary pool (3). A first gear (16) is fixedly installed at one end of the first lead screw (10) located outside the filter cylinder (6). A second gear is fixedly installed on the second lead screw (12), and both the second gear and the first gear (16) are meshed with the first rack (15). A fourth gear (28) is fixedly installed on the third lead screw (26). A third rack (29) matched with the fourth gear (28) is fixedly installed on the side wall of the filter cylinder (6). The initial distance between the third rack (29) and the fourth gear (28) is greater than the radius of the filter cylinder (6).

6. The domestic sewage treatment equipment for municipal water supply and drainage according to claim 1, characterized in that, The clamping component consists of a slider (18), a chute (19), an arc-shaped groove (20), a sealing ring (21), a T-shaped groove (22), a connecting rod (23), and a tension spring. The sealing ring (21) is rotatably installed on the bottom plate (17) in a sealed manner. A plurality of sliders (18) are fixedly installed on the side wall of the bottom plate (17). A plurality of chutes (19) that cooperate with the corresponding sliders (18) are formed on the inner wall of the filter cylinder (6). An arc-shaped groove (20) that cooperates with the corresponding slider (18) is formed on the bottom wall of each chute (19). A plurality of connecting rods (23) are fixedly installed on the side wall of the sealing ring (21). A plurality of T-shaped grooves (22) that slide and cooperate with the corresponding connecting rods (23) are formed on the side wall of the filter cylinder (6). A tension spring is installed between each T-shaped groove (22) and the corresponding connecting rod (23).

7. The domestic sewage treatment equipment for municipal water supply and drainage according to claim 5, characterized in that, A gear three (24) is fixedly installed at one end of the bottom plate (17) away from the filter cylinder (6). A rack two (25) that cooperates with the gear three (24) is fixedly installed at one end of the first-stage pool (2) close to the second-stage pool (3). The sum of the lengths of the rack two (25) and the rack three (29) is less than the length of the rack one (15). The length of the rack one (15) is greater than twice the diameter of the filter cylinder (6).

8. A domestic sewage treatment device for municipal water supply and drainage according to claim 1, characterized in that, The first-stage pool (2) is used for filtering sewage. The second-stage pool (3) is used for biological treatment of sewage. The third-stage pool (4) is used for advanced treatment of sewage. The bottoms of the second-stage pool (3) and the third-stage pool (4) are both inverted trapezoids. Discharge ports are formed on the side walls of the first-stage pool (2), the second-stage pool (3), and the third-stage pool (4). A sealing plug (34) is threadedly connected to each discharge port.

9. The domestic sewage treatment equipment for municipal water supply and drainage according to claim 1, characterized in that, A groove (35) is formed on the inner wall of the filter cylinder (6). An inner cylinder (36) is rotatably installed on the groove (35) in a sealed manner. A plurality of alignment holes (37) are formed on the side wall of the inner cylinder (36). Each alignment hole (37) corresponds to the position of the corresponding filter hole on the filter cylinder (6). An installation ring (39) is installed on the lead screw one (10) through a damping bearing. A plurality of support rods (40) are fixedly installed between the installation ring (39) and the inner cylinder (36).

10. A domestic sewage treatment device for municipal water supply and drainage, characterized in that, A rotating ring (41) is rotatably installed on one end of the push plate (11) close to the bottom plate (17) in a sealed manner. A guiding push block (42) that cooperates with the thread groove on the lead screw one (10) is fixedly installed on the inner wall of the rotating ring (41). A fixing ring (43) is fixedly installed at one end of the rotating ring (41) away from the push plate (11). A cleaning brush (44) that cooperates with a plurality of lead screws one (10) is fixedly installed on the inner wall of the fixing ring (43).

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