A domestic sewage treatment system based on municipal water supply and drainage technology

Abstract

The present application relates to the field of domestic sewage purification, and particularly relates to a domestic sewage treatment system based on municipal water supply and drainage technology, which comprises a shell assembly, further comprises a pushing assembly connected to the shell assembly, and a preliminary filtering assembly connected to the pushing assembly. When the first liquid level sensor detects that the water level in the pre-storage tank is lower than the predetermined liquid level, the municipal water supply can be sent into the pre-storage tank through the water supply pipe. When the municipal water supply entering the pre-storage tank exceeds the first liquid level sensor, the water supply can be stopped, so that the municipal water supply can be intermittently delivered to the inside of the pre-storage tank, so that the water supply in the fixed water tank will not be wasted due to the fluctuation of the water supply of the liquid outlet pipe. The water in the pre-storage tank is delivered to the fixed water tank through the siphon pipe, so that the water entering the fixed water tank will not be affected by the amount of domestic sewage purification water, so that the use pipe can continuously output water.

Description

Technical Field

[0001] This invention relates to the field of domestic sewage purification, and more particularly to a domestic sewage treatment system based on municipal water supply and drainage technology. Background Technology

[0002] Municipal water supply and drainage systems typically consist of a water source, water transmission pipelines, water treatment plants, and a distribution network. Water is drawn from the source and transported through pipelines to the water treatment plant for treatment. The treated water is then pressurized and distributed to users through the distribution network. Municipal water supply and drainage systems are further divided into rural and urban systems. In water supply and drainage technology, the treatment of domestic sewage is a crucial aspect. In rural areas, domestic sewage is often treated using multi-stage sewage purification structures. Existing multi-stage domestic sewage treatment systems can purify domestic sewage through multiple treatment stages. The purified water can then be used for residents' daily lives and integrated with the municipal water supply system to meet their needs.

[0003] However, due to municipal water supply charges, residents inevitably prioritize using purified water from domestic sewage. But the amount of purified water is often limited by the residents' living conditions, resulting in fluctuations in the amount of purified water. Residents often find that the amount of purified water is insufficient to meet their needs, requiring them to restart the municipal water supply, which to some extent affects their user experience.

[0004] Therefore, when the aforementioned domestic sewage treatment system is in use, the purified water from the domestic sewage may not meet the residents' needs, which will cause residents to spend extra time activating the municipal water supply, thus affecting their water usage experience. Summary of the Invention

[0005] In order to overcome the fact that the production of purified water in the existing domestic sewage treatment system fluctuates during use, making it difficult to meet the needs of residents and thus affecting their comfort.

[0006] The technical solution of the present invention is as follows: a domestic sewage treatment system based on municipal water supply and drainage technology, comprising an outer shell assembly, characterized in that: it further comprises a pushing assembly connected to the outer shell assembly, a primary filter assembly connected to the pushing assembly, a sludge removal assembly connected to the primary filter assembly, a secondary filter assembly connected to the sludge removal assembly, a conveying assembly connected to the secondary filter assembly, a liquid outlet assembly connected to the outer shell assembly, a sludge discharge assembly connected to the primary filter assembly, a water tank assembly connected to the liquid outlet assembly, and a pre-storage assembly connected to the water tank assembly. The pushing assembly is used to convey domestic sewage falling on the primary filter assembly to the sludge removal assembly. The primary filter assembly is used to filter the domestic sewage conveyed to the primary filter assembly. The sludge removal assembly is used to remove impurities from the domestic sewage conveyed to the sludge removal assembly. The secondary filter assembly is used to filter the domestic sewage conveyed to the secondary filter assembly. The conveying assembly is used to drive the domestic sewage in the secondary filter assembly to the liquid outlet assembly. The liquid outlet assembly is used to settle the domestic sewage conveyed to the liquid outlet assembly, and simultaneously convey the upper liquid of the settled domestic sewage to the water tank assembly. The water tank assembly includes a tank assembly connected to the liquid outlet assembly and a first control assembly connected to the tank assembly. The tank assembly is used to store purified water from domestic sewage, and the first control assembly is used to control the opening and closing of the tank assembly. The pre-storage component includes a storage component connected to the housing component and a second control component connected to the storage component. The storage component is used to store municipal water supply, and the second control component is used to control the opening and closing of the storage component.

[0007] Preferably, the housing assembly includes a sealing cap connected to the outlet pipe, a fixed water tank connected to the sealing cap, a usage pipe connected to the fixed water tank, a second electrically controlled valve connected to the usage pipe, and several support legs connected to the sealing cap. The first control component includes an air intake pipe connected to a fixed water tank, a third self-priming pump connected to the air intake pipe, a second liquid level sensor connected to the fixed water tank, and a third liquid level sensor disposed below the second liquid level sensor. The third liquid level sensor is connected to the fixed water tank, and the second liquid level sensor and the third liquid level sensor are respectively used to detect the liquid level in the fixed water tank.

[0008] Preferably, the storage component includes a pre-storage box connected to the support leg and a plurality of siphon tubes connected to the pre-storage box; The second control component includes a second motor connected to the pre-storage tank, a motor shaft connected to the output shaft of the second motor, a sealing disc connected to the motor shaft, a water supply pipe connected to the pre-storage tank, a first liquid level sensor connected to the pre-storage tank, and several siphon tubes connected to a fixed water tank. The siphon tubes are used to transport liquid from the pre-storage tank to the fixed water tank. The second motor is used to drive the sealing disc to control the opening and closing of the siphon tubes. The first liquid level sensor is used to detect the liquid level in the pre-storage tank.

[0009] Preferably, the secondary filter assembly includes a filter bed frame connected to the impurity removal assembly, a fixed filter bed connected to the filter bed frame, a packing bed connected to the outer shell assembly, a combination plate connected to the filter bed frame, and a plurality of exhaust pipes connected to the combination plate, wherein the packing bed is filled with anaerobic packing material.

[0010] Preferably, the outer shell assembly includes a fixed outer shell connected to the packing bed, a slag collection box connected to the fixed outer shell, a slag collection pipe connected to the slag collection box, a liquid inlet pipe connected to the fixed outer shell, and a fixed baffle connected to the outer wall of the fixed outer shell. The slag collection box and the slag collection pipe are used to collect the slag discharged by the slag discharge assembly.

[0011] Preferably, the feeding assembly includes a positioning plate connected to the primary filter assembly, a push rod cover movably connected to the positioning plate, a second hydraulic push rod connected to the push rod cover, a sliding bar connected to the second hydraulic push rod, a first hydraulic push rod connected to the sliding bar, and a positioning frame movably connected to the first hydraulic push rod. The positioning frame is fixedly connected to the fixed housing, and the first hydraulic push rod is used to drive the push rod cover to slide along the positioning plate.

[0012] Preferably, the primary filter assembly includes a connecting strip connected to the positioning plate, a primary filter plate connected to the connecting strip, a sliding seat connected to the connecting strip, a scraper movably connected to the sliding seat, and a connecting piece connected to the scraper. The connecting piece is connected to the second hydraulic push rod, and the primary filter plate has multiple filter holes.

[0013] Preferably, the impurity removal assembly includes an impurity removal box connected to a connecting strip, several separating strips connected to the impurity removal box, a fixing plate connected to the impurity removal box, two sets of guide plates connected to the fixing plate, and several connecting pipes connected to the fixing plate. Each set of guide plates is provided with several pieces, and the two sets of guide plates are arranged opposite to each other. The fixing plate is fixedly connected to the fixed shell, and the several separating strips are used to separate domestic sewage from particulate impurities in domestic sewage.

[0014] Preferably, the conveying assembly includes a conveying pipe connected to the combination plate, a tee connected to the conveying pipe, a first connecting pump pipe connected to the tee, a first self-priming pump connected to the first connecting pump pipe, a second connecting pump pipe connected to the output end of the first self-priming pump, and a sedimentation plate connected to the second connecting pump pipe. The sedimentation plate is fixedly connected to the fixed housing, and the first self-priming pump is connected to the combination plate. The first self-priming pump is used to drive the domestic sewage floating on the upper part of the fixed filter bed to be conveyed into the effluent assembly. The liquid discharge assembly includes a sedimentation tank located inside a fixed outer shell, a second self-priming pump connected to the fixed outer shell, a clear liquid pipe connected to the second self-priming pump, a liquid discharge pipe connected to the second self-priming pump, and a first electrically controlled valve connected to the liquid discharge pipe. The second self-priming pump is used to drive the domestic sewage settled at the upper end of the sedimentation tank to be transported into the water tank assembly.

[0015] Preferably, the slag discharge assembly includes a slag stacking plate connected to the primary filter plate, a rotating screw movably connected to the fixed housing, a first motor connected to the rotating screw, a limiting rod connected to the fixed housing, a slag pushing plate movably connected to the limiting rod, a first screw slide rail connected to the inner wall of the fixed housing, a first screw slider movably connected to the first screw slide rail, a connecting block connected to the first screw slider, a second screw slide rail connected to the connecting block, a second screw slider movably connected to the second screw slide rail, a third hydraulic push rod connected to the second screw slider, a positioning bar connected to the third hydraulic push rod, a limiting shaft movably connected to the positioning bar, and a slag pushing block connected to the positioning bar. The slag pushing plate is clearance-fitted with the rotating screw, the limiting shaft is connected to the second screw slider, and the first motor is used to drive the slag pushing plate to move along the rotating screw.

[0016] The beneficial effects of this invention are: Based on the conventional domestic sewage treatment system, the sewage treatment structure is modified. When the first liquid level sensor detects that the water level inside the pre-storage tank is lower than the predetermined liquid level, municipal water supply can be sent into the pre-storage tank through the water supply pipe. Once the municipal water supply entering the pre-storage tank exceeds the first liquid level sensor, the water supply can be stopped, so that the municipal water supply can be delivered to the pre-storage tank intermittently. This prevents the water supply inside the fixed water tank from being wasted due to fluctuations in the water supply through the outlet pipe. The water inside the pre-storage tank is then transported to the fixed water tank through a siphon pipe, so that the water entering the fixed water tank is not affected by the amount of domestic sewage purification water, thus allowing the water supply pipe to output water continuously. During the use of the device, there is an inevitable phenomenon of excessive purified domestic sewage. When the fixed water tank is filled with purified domestic sewage, the municipal water supply output from the pre-storage tank will cause the water in the fixed water tank to overflow, resulting in water waste. The second and third liquid level sensors can work together to achieve dual determination of the water level in the fixed water tank, so that the water delivery of the pre-storage component can be controlled by the second motor. At the same time, because the municipal water supply in the pre-storage tank is intermittent and limited by the scarcity of water supply points in rural areas, there will be a certain delay in the municipal water supply. This delay can be combined with the intermittent delivery to ensure that the water entering the pre-storage tank does not exceed the volume of the pre-storage tank, thereby preventing water waste in the domestic sewage treatment system to a certain extent. By setting a first hydraulic push rod to drive the push rod cover to slide along the positioning plate, and by using a second hydraulic push rod to drive the connecting piece to move along the connecting strip, the scraper can move along the sliding seat, which in turn allows the primary filter plate to move along the primary filter plate. After moving to the bottom, it returns to the top of the primary filter plate, thereby achieving full filtration of domestic sewage remaining on the primary filter plate and improving the working efficiency of the entire domestic sewage treatment system. Attached Figure Description

[0017] Figure 1 The diagram shown is a first three-dimensional structural schematic of the domestic sewage treatment system of the present invention; Figure 2 The diagram shown is a second three-dimensional structural schematic of the domestic sewage treatment system of the present invention; Figure 3 The diagram shown is a three-dimensional structural schematic of the effluent component of the domestic wastewater treatment system of the present invention. Figure 4 The diagram shown is a three-dimensional structural schematic of the feeding component of the domestic sewage treatment system of the present invention. Figure 5 The diagram shown is a three-dimensional structural schematic of the primary filter component of the domestic sewage treatment system of the present invention. Figure 6 The image shown is a partial enlarged view of point A in the domestic sewage treatment system of the present invention; Figure 7 The diagram shown is a three-dimensional structural schematic of the two-filter assembly of the domestic sewage treatment system of the present invention. Figure 8 The diagram shown is a first three-dimensional structural schematic of the conveying component of the domestic sewage treatment system of the present invention; Figure 9 The diagram shown is a second perspective structural schematic of the conveying component of the domestic sewage treatment system of the present invention; Figure 10The diagram shown is a first three-dimensional structural schematic of the sludge discharge component of the domestic sewage treatment system of the present invention. Figure 11 The diagram shown is a second three-dimensional structural schematic of the sludge discharge component of the domestic sewage treatment system of the present invention; Figure 12 The diagram shown is a three-dimensional structural schematic of the pre-stored components of the domestic sewage treatment system of the present invention. Figure 13 The diagram shown is a first three-dimensional structural schematic of the water tank assembly of the domestic sewage treatment system of the present invention; Figure 14 The diagram shown is a second perspective structural schematic of the water tank assembly of the domestic sewage treatment system of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Outer shell assembly; 2. Feeding assembly; 3. Primary filter assembly; 4. Impurity removal assembly; 5. Secondary filter assembly; 6. Conveying assembly; 7. Liquid discharge assembly; 8. Slag discharge assembly; 9. Pre-storage assembly; 10. Water tank assembly; 101. Fixed outer shell; 102. Slag collection box; 103. Slag collection pipe; 104. Liquid inlet pipe; 105. Fixed baffle; 201. Positioning frame; 202. First hydraulic push rod; 203. Sliding bar; 204. Second hydraulic push rod; 205. Push rod cover; 206. 301. Positioning plate; 302. Connecting piece; 303. Scraper; 304. Sliding seat; 305. Connecting strip; 306. Primary filter plate; 407. Impurity removal box; 408. Separating strip; 409. Fixing plate; 4000. Guide plate; 4001. Connecting pipe; 501. Filter bed frame; 502. Fixed filter bed; 503. Packing bed; 504. Combination plate; 505. Exhaust pipe; 601. Conveying pipe; 602. T-joint; 603. First connecting pump pipe; 604. First self-priming pump; 605. Second connecting pump Pipe; 606, Sedimentation plate; 701, Sedimentation tank; 702, Clarified liquid pipe; 703, Second self-priming pump; 704, Discharge pipe; 705, First electrically controlled valve; 801, Slag stacking plate; 802, Slag pushing plate; 803, Rotating screw; 804, Limiting rod; 805, First motor; 806, First screw slide rail; 807, First screw slider; 808, Connecting block; 809, Second screw slide rail; 810, Second screw slider; 811, Third hydraulic push rod; 812, Positioning bar; 81 3. Limiting shaft; 814. Slag removal block; 901. Pre-storage box; 902. Siphon pipe; 903. Second motor; 904. Motor shaft; 905. Sealing plate; 906. Water supply pipe; 907. First liquid level sensor; 1001. Sealing cover; 1002. Fixed water tank; 1003. Use pipe; 1004. Suction pipe; 1005. Third self-priming pump; 1006. Second liquid level sensor; 1007. Third liquid level sensor; 1008. Support leg; 1009. Second electric control valve. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] A domestic sewage treatment system based on municipal water supply and drainage technology, according to Figure 1-14 As shown, the device includes a housing assembly 1, characterized in that it further includes a pushing assembly 2 connected to the housing assembly 1, a primary filter assembly 3 connected to the pushing assembly 2, a purification assembly 4 connected to the primary filter assembly 3, a secondary filter assembly 5 connected to the purification assembly 4, a conveying assembly 6 connected to the secondary filter assembly 5, a liquid outlet assembly 7 connected to the housing assembly 1, a slag discharge assembly 8 connected to the primary filter assembly 3, a water tank assembly 10 connected to the liquid outlet assembly 7, and a pre-storage assembly 9 connected to the water tank assembly 10. The pushing assembly 2 is used to push the material falling into the primary filter assembly. The domestic sewage from the primary filter 3 is transported to the impurity removal component 4. The primary filter 3 is used to filter the domestic sewage transported to the primary filter 3. The impurity removal component 4 is used to remove impurities from the domestic sewage transported to the impurity removal component 4. The secondary filter 5 is used to filter the domestic sewage transported to the secondary filter 5. The conveying component 6 is used to drive the domestic sewage in the secondary filter 5 to the effluent component 7. The effluent component 7 is used to settle the domestic sewage transported to the effluent component 7, and at the same time, the upper liquid of the settled domestic sewage is transported to the water tank component 10. The water tank assembly 10 includes a tank assembly connected to the liquid outlet assembly 7 and a first control assembly connected to the tank assembly. The tank assembly is used to store purified water from domestic sewage, and the first control assembly is used to control the opening and closing of the tank assembly. The pre-storage component 9 includes a storage component connected to the housing component and a second control component connected to the storage component. The storage component is used to store municipal water supply, and the second control component is used to control the opening and closing of the storage component.

[0021] according to Figure 12-14 As shown, the housing assembly includes a sealing cap 1001 connected to the outlet pipe 704, a fixed water tank 1002 connected to the sealing cap 1001, a usage pipe 1003 connected to the fixed water tank 1002, a second electrically controlled valve 1009 connected to the usage pipe 1003, and several support legs 1008 connected to the sealing cap 1001. The first control component includes an air suction pipe 1004 connected to a fixed water tank 1002, a third self-priming pump 1005 connected to the air suction pipe 1004, a second liquid level sensor 1006 connected to the fixed water tank 1002, and a third liquid level sensor 1007 disposed below the second liquid level sensor 1006. The third liquid level sensor 1007 is connected to the fixed water tank 1002. The second liquid level sensor 1006 and the third liquid level sensor 1007 are respectively used to detect the liquid level in the fixed water tank 1002.

[0022] It should be noted that when water needs to be drawn from the fixed water tank 1002, the third liquid level sensor 1007 will detect that the water level inside the fixed water tank 1002 is lower than the third liquid level sensor 1007. Then, the third self-priming pump 1005 will be activated to draw air out of the siphon pipe 902, so that the siphon pipe 902 will transport the water in the pre-storage tank 901 to the fixed water tank 1002 in the form of a siphon. At the same time, the first electric control valve 705 will be opened, so that the second self-priming pump 703 will act on the clear liquid pipe 702, and the water in the sedimentation tank 701 will enter the fixed water tank 1002 to achieve water replenishment of the fixed water tank 1002.

[0023] according to Figure 12-13 As shown, the storage component includes a pre-storage box 901 connected to the support leg 1008 and a plurality of siphon tubes 902 connected to the pre-storage box 901; The second control component includes a second motor 903 connected to the pre-storage tank 901, a motor shaft 904 connected to the output shaft of the second motor 903, a sealing disc 905 connected to the motor shaft 904, a water supply pipe 906 connected to the pre-storage tank 901, a first liquid level sensor 907 connected to the pre-storage tank 901, and several siphon pipes 902 connected to a fixed water tank 1002. The siphon pipes 902 are used to transport liquid from the pre-storage tank 901 to the fixed water tank 1002. The second motor 903 is used to drive the sealing disc 905 to control the opening and closing of the siphon phenomenon of the siphon pipes 902. The first liquid level sensor 907 is used to detect the liquid level in the pre-storage tank 901.

[0024] It should be noted that the water inside the pre-storage tank 901 is transported to the fixed water tank 1002 by siphon. When the first liquid level sensor 907 detects that the water level inside the pre-storage tank 901 is lower than the predetermined liquid level, municipal water supply is sent into the pre-storage tank 901 through the water supply pipe 906. Once the municipal water supply entering the pre-storage tank 901 exceeds the first liquid level sensor 907, the water supply can be stopped, so that the municipal water supply is delivered intermittently. This ensures that the water supply inside the fixed water tank 1002 will not be wasted due to fluctuations in the water supply through the outlet pipe 704.

[0025] according to Figure 7 As shown, the secondary filter assembly 5 includes a filter bed frame 501 connected to the impurity removal assembly 4, a fixed filter bed 502 connected to the filter bed frame 501, a packing bed 503 connected to the outer shell assembly 1, a combination plate 504 connected to the filter bed frame 501, and a plurality of exhaust pipes 505 connected to the combination plate 504. The packing bed 503 is filled with anaerobic packing.

[0026] according to Figure 2As shown, the outer shell assembly 1 includes a fixed outer shell 101 connected to the packing bed 503, a slag collection box 102 connected to the fixed outer shell 101, a slag collection pipe 103 connected to the slag collection box 102, a liquid inlet pipe 104 connected to the fixed outer shell 101, and a fixed baffle 105 connected to the outer wall of the fixed outer shell 101. The slag collection box 102 and the slag collection pipe 103 are used to collect the slag discharged by the slag discharge assembly 8, and the liquid inlet pipe 104 is used to simultaneously send rainwater and domestic sewage into the fixed outer shell 101.

[0027] according to Figure 4-5 As shown, the feeding assembly 2 includes a positioning plate 206 connected to the primary filter assembly 3, a push rod cover 205 movably connected to the positioning plate 206, a second hydraulic push rod 204 connected to the push rod cover 205, a sliding bar 203 connected to the second hydraulic push rod 204, a first hydraulic push rod 202 connected to the sliding bar 203, and a positioning frame 201 movably connected to the first hydraulic push rod 202. The positioning frame 201 is fixedly connected to the fixed housing 101.

[0028] It should be noted that the first hydraulic push rod 202 is used to drive the push rod cover 205 to slide along the positioning plate 206, and the second hydraulic push rod 204 drives the connecting piece 301 to move along the connecting strip 304, so that the scraper plate 302 can move along the sliding seat 303, so that the primary filter plate 305 can move along the primary filter plate 305, and after moving to the bottom, it returns to the top of the primary filter plate 305.

[0029] according to Figure 5-6 As shown, the primary filter assembly 3 includes a connecting strip 304 connected to the positioning plate 206, a primary filter plate 305 connected to the connecting strip 304, a sliding seat 303 connected to the connecting strip 304, a scraper 302 movably connected to the sliding seat 303, and a connecting piece 301 connected to the scraper 302. The connecting piece 301 is connected to the second hydraulic push rod 204, and the primary filter plate 305 has multiple filter holes.

[0030] It should be noted that the scraper plate 302 removes the residues of domestic sewage and rainwater remaining on the primary filter plate 305, thereby achieving the initial filtration of the mixture of rainwater and domestic sewage.

[0031] according to Figure 4 and Figure 7 As shown, the impurity removal assembly 4 includes an impurity removal box 401 connected to the connecting strip 304, several separating strips 402 connected to the impurity removal box 401, a fixing plate 403 connected to the impurity removal box 401, two sets of guide plates 404 connected to the fixing plate 403, and several connecting pipes 405 connected to the fixing plate 403. Each set of guide plates 404 is provided with several pieces, and the two sets of guide plates 404 are arranged opposite to each other. The fixing plate 403 is fixedly connected to the fixing shell 101.

[0032] It should be noted that several separation bars 402 are used to separate domestic sewage from particulate impurities in domestic sewage, and several guide plates 404 are set to accelerate the solid-liquid separation of the mixture of domestic sewage and rainwater impacting the guide plates 404.

[0033] according to Figure 8-9 As shown, the conveying assembly 6 includes a conveying pipe 601 connected to the combination plate 504, a tee head 602 connected to the conveying pipe 601, a first connecting pump pipe 603 connected to the tee head 602, a first self-priming pump 604 connected to the first connecting pump pipe 603, a second connecting pump pipe 605 connected to the output end of the first self-priming pump 604, and a sedimentation plate 606 connected to the second connecting pump pipe 605. The sedimentation plate 606 is fixedly connected to the fixed housing 101. The first self-priming pump 604 is connected to the combination plate 504 and is used to drive the domestic sewage floating on the upper end of the fixed filter bed 502 to be conveyed into the effluent assembly 7.

[0034] according to Figure 3 , Figure 9-10 and Figure 12 As shown, the liquid discharge assembly 7 includes a sedimentation tank 701 opened inside the fixed housing 101, a second self-priming pump 703 connected to the fixed housing 101, a clear liquid pipe 702 connected to the second self-priming pump 703, a liquid discharge pipe 704 connected to the second self-priming pump 703, and a first electrically controlled valve 705 connected to the liquid discharge pipe 704. The second self-priming pump 703 is used to drive the domestic sewage settled at the upper end of the sedimentation tank 701 to be transported into the water tank assembly 10.

[0035] according to Figure 10-11 As shown, the slag discharge assembly 8 includes a slag stacking plate 801 connected to the primary filter plate 305, a rotating screw 803 movably connected to the fixed housing 101, a first motor 805 connected to the rotating screw 803, a limiting rod 804 connected to the fixed housing 101, a slag pushing plate 802 movably connected to the limiting rod 804, a first screw slide rail 806 connected to the inner wall of the fixed housing 101, a first screw slider 807 movably connected to the first screw slide rail 806, a connecting block 808 connected to the first screw slider 807, and a connecting block 808. The system includes a second lead screw slide rail 809, a second lead screw slider 810 movably connected to the second lead screw slide rail 809, a third hydraulic push rod 811 connected to the second lead screw slider 810, a positioning bar 812 connected to the third hydraulic push rod 811, a limiting shaft 813 movably connected to the positioning bar 812, and a slag-pushing block 814 connected to the positioning bar 812. The slag-pushing plate 802 is clearance-fitted with the rotating lead screw 803, and the limiting shaft 813 is connected to the second lead screw slider 810. The first motor 805 is used to drive the slag-pushing plate 802 to move along the rotating lead screw 803.

[0036] It should be noted that the large-volume residue pushed by the slag-dispensing block 814 is transported to the slag-collecting pipe 103 by the moving slag-pushing plate 802. At the same time, the second screw slide rail 809 is driven to move horizontally longitudinally by the cooperation of the first screw slide rail 806 and the first screw slider 807. The third hydraulic push rod 811 is driven to move horizontally laterally by the cooperation of the second screw slide rail 809 and the second screw slider 810. The third hydraulic push rod 811 drives the slag-dispensing block 814 to move vertically along the limiting shaft 813. In this way, the large-volume particles falling at the bottom end of the primary filter plate 305 are moved onto the moving path of the slag-pushing plate 802 by the multi-directional moving slag-dispensing block 814.

[0037] The entire process can be achieved by purifying rainwater and domestic sewage in a unified manner, and by setting up pre-stored components 9 to realize intermittent municipal water supply, so as to ensure that the municipal water supply is not affected by the fluctuation of purified water supply, and at the same time, it can also ensure the stability of the effluent from the domestic sewage treatment system.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A domestic sewage treatment system based on municipal water supply and drainage technology, comprising an outer casing assembly (1), characterized in that: It also includes a feeding assembly (2) connected to the outer casing assembly (1), a primary filter assembly (3) connected to the feeding assembly (2), a cleaning assembly (4) connected to the primary filter assembly (3), a secondary filter assembly (5) connected to the cleaning assembly (4), a conveying assembly (6) connected to the secondary filter assembly (5), a liquid outlet assembly (7) connected to the outer casing assembly (1), a slag discharge assembly (8) connected to the primary filter assembly (3), a water tank assembly (10) connected to the liquid outlet assembly (7), and a pre-storage assembly (9) connected to the water tank assembly (10). The feeding assembly (2) is used to discharge domestic sewage falling onto the primary filter assembly (3). Water is transported to the impurity removal component (4). The primary filter component (3) is used to filter the domestic sewage transported to the primary filter component (3). The impurity removal component (4) is used to remove impurities from the domestic sewage transported to the impurity removal component (4). The secondary filter component (5) is used to filter the domestic sewage transported to the secondary filter component (5). The transport component (6) is used to drive the domestic sewage in the secondary filter component (5) to the liquid outlet component (7). The liquid outlet component (7) is used to settle the domestic sewage transported to the liquid outlet component (7) and at the same time, the upper liquid of the settled domestic sewage is transported to the water tank component (10). The water tank assembly (10) includes a tank assembly connected to the liquid outlet assembly (7) and a first control assembly connected to the tank assembly. The tank assembly is used to store purified water from domestic sewage, and the first control assembly is used to control the opening and closing of the tank assembly. The pre-storage component (9) includes a storage component connected to the housing component and a second control component connected to the storage component. The storage component is used to store municipal water supply, and the second control component is used to control the opening and closing of the storage component. The liquid discharge assembly (7) includes a sedimentation tank (701) opened inside the fixed housing (101), a second self-priming pump (703) connected to the fixed housing (101), a clear liquid pipe (702) connected to the second self-priming pump (703), a liquid discharge pipe (704) connected to the second self-priming pump (703), and a first electrically controlled valve (705) connected to the liquid discharge pipe (704). The second self-priming pump (703) is used to drive the domestic sewage settled at the upper end of the sedimentation tank (701) to be transported to the water tank assembly (10). The housing assembly includes a sealing cap (1001) connected to the outlet pipe (704), a fixed water tank (1002) connected to the sealing cap (1001), a usage pipe (1003) connected to the fixed water tank (1002), a second electrically controlled valve (1009) connected to the usage pipe (1003), and several support legs (1008) connected to the sealing cap (1001). The first control component includes an air suction pipe (1004) connected to a fixed water tank (1002), a third self-priming pump (1005) connected to the air suction pipe (1004), a second liquid level sensor (1006) connected to the fixed water tank (1002), and a third liquid level sensor (1007) disposed below the second liquid level sensor (1006). The third liquid level sensor (1007) is connected to the fixed water tank (1002). The second liquid level sensor (1006) and the third liquid level sensor (1007) are respectively used to detect the liquid level in the fixed water tank (1002). When water needs to be drawn from the fixed water tank (1002), the third liquid level sensor (1007) will detect that the water level inside the fixed water tank (1002) is lower than the third liquid level sensor (1007), and then the third self-priming pump (1005) will be started to draw air from the siphon pipe (902), so that the siphon pipe (902) will transport the water in the pre-storage tank (901) to the fixed water tank (1002) in the form of siphon. At the same time, the first electric control valve (705) will be opened, so that the second self-priming pump (703) will act on the clear liquid pipe (702), and the water in the sedimentation tank (701) will enter the fixed water tank (1002) to achieve water replenishment to the fixed water tank (1002). The storage component includes a pre-storage box (901) connected to the support leg (1008) and a plurality of siphon tubes (902) connected to the pre-storage box (901). The second control component includes a second motor (903) connected to the pre-storage tank (901), a motor shaft (904) connected to the output shaft of the second motor (903), a sealing plate (905) connected to the motor shaft (904), a water supply pipe (906) connected to the pre-storage tank (901), and a first liquid level sensor (907) connected to the pre-storage tank (901). Several siphon tubes (902) are connected to a fixed water tank (1002). The siphon tubes (902) are used to transport liquid in the pre-storage tank (901) to the fixed water tank (1002). The second motor (903) is used to drive the sealing plate (905) to control the opening and closing of the siphon tubes (902). The first liquid level sensor (907) is used to detect the liquid level in the pre-storage tank (901). When the first liquid level sensor (907) detects that the water level inside the pre-storage tank (901) is lower than the predetermined liquid level, municipal water supply is sent into the pre-storage tank (901) through the water supply pipe (906). Once the municipal water supply entering the pre-storage tank (901) exceeds the first liquid level sensor (907), the water supply can be stopped.

2. A domestic sewage treatment system based on municipal water supply and drainage technology according to claim 1, characterized in that: The second filter assembly (5) includes a filter bed frame (501) connected to the impurity removal assembly (4), a fixed filter bed (502) connected to the filter bed frame (501), a packing bed (503) connected to the outer shell assembly (1), a combination plate (504) connected to the filter bed frame (501), and a plurality of exhaust pipes (505) connected to the combination plate (504). The packing bed (503) is filled with anaerobic packing.

3. A domestic sewage treatment system based on municipal water supply and drainage technology according to claim 2, characterized in that: The outer shell assembly (1) includes a fixed outer shell (101) connected to the packing bed (503), a slag collection box (102) connected to the fixed outer shell (101), a slag collection pipe (103) connected to the slag collection box (102), a liquid inlet pipe (104) connected to the fixed outer shell (101), and a fixed baffle (105) connected to the outer wall of the fixed outer shell (101). The slag collection box (102) and the slag collection pipe (103) are used to collect the slag discharged by the slag discharge assembly (8).

4. A domestic sewage treatment system based on municipal water supply and drainage technology according to claim 3, characterized in that: The feeding assembly (2) includes a positioning plate (206) connected to the primary filter assembly (3), a push rod cover (205) movably connected to the positioning plate (206), a second hydraulic push rod (204) connected to the push rod cover (205), a sliding bar (203) connected to the second hydraulic push rod (204), a first hydraulic push rod (202) connected to the sliding bar (203), and a positioning frame (201) movably connected to the first hydraulic push rod (202). The positioning frame (201) is fixedly connected to the fixed housing (101), and the first hydraulic push rod (202) is used to drive the push rod cover (205) to slide along the positioning plate (206).

5. A domestic sewage treatment system based on municipal water supply and drainage technology according to claim 4, characterized in that: The primary filter assembly (3) includes a connecting strip (304) connected to the positioning plate (206), a primary filter plate (305) connected to the connecting strip (304), a sliding seat (303) connected to the connecting strip (304), a scraper (302) movably connected to the sliding seat (303), and a connecting piece (301) connected to the scraper (302). The connecting piece (301) is connected to the second hydraulic push rod (204), and the primary filter plate (305) has multiple filter holes.

6. A domestic sewage treatment system based on municipal water supply and drainage technology according to claim 5, characterized in that: The impurity removal component (4) includes an impurity removal box (401) connected to a connecting strip (304), a plurality of separation strips (402) connected to the impurity removal box (401), a fixing plate (403) connected to the impurity removal box (401), two sets of guide plates (404) connected to the fixing plate (403), and a plurality of connecting pipes (405) connected to the fixing plate (403). Each set of guide plates (404) is provided with a plurality of pieces. The two sets of guide plates (404) are arranged opposite to each other. The fixing plate (403) is fixedly connected to the fixing shell (101). The plurality of separation strips (402) are used to separate domestic sewage from particulate impurities in domestic sewage.

7. A domestic sewage treatment system based on municipal water supply and drainage technology according to claim 6, characterized in that: The conveying assembly (6) includes a conveying pipe (601) connected to the combination plate (504), a three-way connector (602) connected to the conveying pipe (601), a first connecting pump pipe (603) connected to the three-way connector (602), a first self-priming pump (604) connected to the first connecting pump pipe (603), a second connecting pump pipe (605) connected to the output end of the first self-priming pump (604), and a sedimentation plate (606) connected to the second connecting pump pipe (605). The sedimentation plate (606) is fixedly connected to the fixed housing (101). The first self-priming pump (604) is connected to the combination plate (504). The first self-priming pump (604) is used to drive the domestic sewage floating on the upper end of the fixed filter bed (502) to be conveyed into the effluent assembly (7).

8. A domestic sewage treatment system based on municipal water supply and drainage technology according to claim 3, characterized in that: The slag discharge assembly (8) includes a slag stacking plate (801) connected to the primary filter plate (305), a rotating screw (803) movably connected to the fixed housing (101), a first motor (805) connected to the rotating screw (803), a limiting rod (804) connected to the fixed housing (101), a slag pushing plate (802) movably connected to the limiting rod (804), a first screw slide rail (806) connected to the inner wall of the fixed housing (101), a first screw slider (807) movably connected to the first screw slide rail (806), a connecting block (808) connected to the first screw slider (807), and a second motor connected to the connecting block (808). The system includes a lead screw slide rail (809), a second lead screw slider (810) movably connected to the second lead screw slide rail (809), a third hydraulic push rod (811) connected to the second lead screw slider (810), a positioning bar (812) connected to the third hydraulic push rod (811), a limiting shaft (813) movably connected to the positioning bar (812), and a slag-pushing block (814) connected to the positioning bar (812). The slag-pushing plate (802) is clearance-fitted with the rotating lead screw (803), and the limiting shaft (813) is connected to the second lead screw slider (810). The first motor (805) is used to drive the slag-pushing plate (802) to move along the rotating lead screw (803).

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