Rural domestic sewage purification equipment

Abstract

The utility model provides rural domestic sewage purification equipment, which relates to the field of rural domestic sewage purification equipment and comprises an integrated treatment component which comprises a grating tank, a regulating tank, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, an equipment box, a sludge tank and an air blower. Sewage in the regulating tank is conveyed to the anaerobic tank through a sewage pump, and nitrification liquid in the aerobic tank flows back to the anoxic tank through a pipeline; according to the rural domestic sewage treatment device, the grille tank, the regulating tank, the anaerobic tank, the anoxic tank, the aerobic tank, the sedimentation tank, the equipment box, the sludge tank and the air blower are arranged, so that the effect of purifying rural domestic sewage is achieved, the domestic sewage can be effectively purified through anaerobic reaction, nitrification liquid denitrification reaction and biodegradation, and the sewage can be effectively purified through backflow of nitrification liquid. The nitrification liquid is lifted by utilizing the existing aeration equipment, and the operation cost and the later maintenance cost are reduced, so that the requirement of rural domestic sewage treatment can be met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rural domestic sewage purification equipment field, specifically rural domestic sewage purification equipment. BACKGROUND

[0002] Integrated sewage treatment is a centralized sewage treatment method, which integrates multiple sewage treatment units in one device or system, and is suitable for small water quantity and stable water quality, for example, building a sewage treatment plant in rural areas is an embodiment of integrated domestic sewage treatment, which can effectively remove organic matter, and can remove nitrogen and phosphorus through the cooperation of aquatic plants and microorganisms, and is suitable for rural domestic sewage, river and natural lake water system treatment and reuse engineering, etc.

[0003] Rural integrated sewage treatment usually adopts integrated AAO process, that is, anaerobic-anoxic-aerobic sewage treatment process, sewage is released phosphorus in the anaerobic zone, denitrified in the anoxic zone, and nitrified and dephosphorized in the aerobic zone, which can achieve good denitrification and dephosphorization effect, and the total hydraulic retention time (HRT) is less than other processes; The process equipment structure is simple, the operation cost in sewage treatment work is low, and it is suitable for popularization and use in most rural areas, in AAO process, the volume of anoxic tank significantly affects the efficiency of sewage treatment, when the volume of anoxic tank changes, the chemical oxygen demand (COD) removal rate increases with the increase of the volume of anoxic tank, the ammonia nitrogen (NH3-N) removal rate decreases with the increase of the volume of anoxic tank, and the total nitrogen (TN) and total phosphorus (TP) removal rate increases first and then decreases with the increase of the volume of anoxic tank.

[0004] However, in actual use, due to the decentralized characteristics of rural domestic sewage source discharge, the difficulty of sewage collection is large, which leads to unstable sewage treatment effect, large land occupation and high treatment cost, thereby restricting the rural sewage treatment work.

[0005] Therefore, the utility model provides a rural domestic sewage purification equipment to solve the above problems. Utility model content

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0007] A rural domestic sewage purification equipment, comprising an integrated treatment assembly, the integrated treatment assembly comprises a grid pool, an adjusting pool, an anaerobic pool, an anoxic pool, an aerobic pool, a sedimentation tank, an equipment box, a sludge tank and a blower;

[0008] The grid pool is used for intercepting solid pollutants in sewage;

[0009] The adjusting pool is used for balancing sewage and mixing sewage from different sources;

[0010] The anaerobic tank is used for hydrolysis, acidification and methanation of organic matters in sewage;

[0011] The anoxic tank is used for providing nitrification reaction to remove nitrogen in sewage;

[0012] The aerobic tank is used for biodegradation, and an aeration pipe is installed in the aerobic tank;

[0013] The sedimentation tank is used for sludge sedimentation;

[0014] An ultraviolet sterilizer for water sterilization, a PLC controller, a touch screen and a wireless communication device are installed in the equipment box, and the PLC controller, the touch screen and the wireless communication device are connected with a remote monitoring and management platform;

[0015] The sludge tank is used for storing sludge;

[0016] The air blower is used for providing air for the aerobic tank and lifting the nitrification liquid and sludge backflow;

[0017] The sewage in the adjusting tank is transported to the anaerobic tank through a sewage pump, the nitrification liquid in the aerobic tank is backflowed to the anoxic tank through a pipeline, the supernatant in the sludge tank is backflowed to the adjusting tank through a pipeline, sludge pipes are installed in the anaerobic tank, the anoxic tank, the aerobic tank and the sedimentation tank, and communicate with the sludge tank, the output end of the air blower communicates with an air pipe, and the air pipe communicates with the sludge backflow pipe, the nitrification liquid backflow pipe and the aeration pipe respectively, and notches are formed in the inner walls of the anaerobic tank, the anoxic tank, the aerobic tank and the sedimentation tank for sewage flow.

[0018] Further, in the utility model, lifting assembly and rubbing assembly are installed in the inner chamber of the grid tank, the rubbing assembly is used for rubbing solid pollutants, and the lifting assembly is used for lifting the rubbing assembly.

[0019] Further, in the utility model, the rubbing assembly includes a frame, rubbing rollers, baffles, a gear box, a motor box, a second motor, a second speed reducer and transmission gears, the rubbing assembly is located at the bottom of the inner chamber of the grid tank, the number of rubbing rollers, baffles and transmission gears is all two, the two rubbing rollers are installed in the inner chamber of the frame, the two baffles are fixed on the two sides of the frame respectively, the two transmission gears are engaged and are all installed in the inner chamber of the gear box, the second motor and the second speed reducer are all installed in the inner chamber of the motor box, the gear box is fixed on the top of the frame, and the motor box is fixed on the top of the gear box.

[0020] Further, in the utility model, one end of the smashing roller is movably connected with the inner wall of the frame through a bearing, the other end of the smashing roller penetrates into the inner cavity of the gear box and is fixedly connected with the transmission gear, the output shaft of the second motor is in transmission connection with the input shaft of the second speed reducer, the output shaft of the second speed reducer penetrates into the inner cavity of the gear box and is in transmission connection with the transmission gear on one side.

[0021] Further, in the utility model, the lifting assembly includes guide rails, a support plate, a winding box, a first motor, a first speed reducer, a winding roller, a rope, an ear and a guide wheel, the number of the guide rails is two, and they are fixed on the two sides of the inner cavity of the grid pool respectively, the top of the guide rail penetrates into the outside of the grid pool, the support plate is fixed on the top of the guide rail, the winding box is fixed on the top of the support plate, the winding roller is installed in the inner cavity of the winding box, and the rope is wound on the surface of the winding roller.

[0022] Further, in the utility model, the first motor and the first speed reducer are fixed on one side of the winding box, the output shaft of the first motor is in transmission connection with the input shaft of the first speed reducer, the output shaft of the first speed reducer penetrates into the inner cavity of the winding box and is in transmission connection with the winding roller, the winding roller is movably connected with the inner wall of the winding box through a bearing, the ear is fixed on the top of the frame, and one end of the rope, away from the winding roller, penetrates into the inner cavity of the grid pool and is fixedly connected with the ear.

[0023] Further, in the utility model, the guide wheel is installed on the two sides of the frame through a bearing, and one end of the guide wheel, away from the frame, extends into the inner cavity of the guide rail and is movably connected with the inner cavity of the guide rail.

[0024] Beneficial effects, the utility model has the following beneficial effects:

[0025] The utility model discloses a grid pool, an adjusting pool, an anaerobic pool, an anoxic pool, an aerobic pool, a sedimentation tank, an equipment box, a sludge pool and a blower are arranged, can rural domestic sewage is purified and handled, the use area of equipment can be reduced through integrated design, domestic sewage can be purified through anaerobic reaction, nitrification liquid denitrification reaction and biodegradation, the existing aeration equipment is used to lift nitrification liquid through the gas stripping backflow mode, reduces the investment of dynamic equipment, reduces operation cost and the maintenance cost of later period, thereby can satisfy rural domestic sewage treatment. ACCURACY OF DRAWINGS

[0026] Figure 1 It is the sewage purification process schematic diagram of the utility model;

[0027] Figure 2 It is the front view structure schematic diagram of integrated treatment subassembly of the utility model;

[0028] Figure 3 is the sectional view structure schematic diagram of the grid pool of the utility model;

[0029] Figure 4 is the separation state structure schematic diagram of the lifting assembly and the crushing assembly of the utility model;

[0030] Figure 5 is the connection state structure schematic diagram of the crushing assembly of the utility model.

[0031] In the drawing:

[0032] 1, integrated processing assembly; 11, grid pool; 12, adjusting pool; 13, anaerobic tank; 14, anoxic tank; 15, aerobic tank; 16, sedimentation tank; 17, equipment box; 18, sludge tank; 19, air blower; 2, lifting assembly; 201, guide rail; 202, support plate; 203, winding box; 204, first motor; 205, first speed reducer; 206, winding roller; 207, rope; 208, lifting lug; 209, guide wheel; 3, crushing assembly; 301, frame; 302, crushing roller; 303, baffle; 304, gear box; 305, motor box; 306, second motor; 307, second speed reducer; 308, transmission gear. DETAILED DESCRIPTION

[0033] In order to better understand the technical content of the utility model, specific embodiments are described below with the accompanying drawings. In the present disclosure, aspects of the utility model are described with reference to the accompanying drawings, and many embodiments are shown in the drawings. The embodiments of the present disclosure are not necessarily defined in all aspects of the utility model. It should be understood that the above-mentioned various concepts and embodiments, as well as those concepts and embodiments described in more detail below, can be implemented in any one of many ways, because the concepts and embodiments disclosed by the utility model are not limited to any implementation. In addition, some aspects of the utility model can be used alone, or used in any appropriate combination with other aspects of the utility model.

[0034] Embodiment 1

[0035] As Figures 1-5 shown, the first embodiment of the utility model provides a rural domestic sewage purification equipment, which comprises an integrated processing assembly 1, the integrated processing assembly 1 comprises a grid pool 11, an adjusting pool 12, an anaerobic tank 13, an anoxic tank 14, an aerobic tank 15, a sedimentation tank 16, an equipment box 17, a sludge tank 18 and an air blower 19;

[0036] The grid pool 11 is used for intercepting solid pollutants in sewage;

[0037] The adjusting pool 12 is used for balancing sewage and mixing sewage from different sources.

[0038] The anaerobic tank 13 is used for hydrolysis, acidification and methanation of organic matters in sewage;

[0039] The anoxic tank 14 is used for providing nitrification reaction to remove nitrogen in sewage;

[0040] The aerobic tank 15 is used for biodegradation, and an aeration pipe is installed in the aerobic tank 15;

[0041] The sedimentation tank 16 is used for sludge sedimentation;

[0042] The equipment box 17 is internally provided with an ultraviolet sterilizer for water sterilization, a PLC controller, a touch screen and a wireless communication device, and the PLC controller, the touch screen and the wireless communication device are connected with a remote monitoring and management platform;

[0043] The sludge tank 18 is used for storing sludge;

[0044] The air blower 19 is used for providing air to the aerobic tank 15 and lifting the backflow of nitrification liquid and sludge;

[0045] The sewage in the adjusting tank 12 is transported to the anaerobic tank 13 by a sewage pump, the nitrification liquid in the aerobic tank 15 is backflowed to the anoxic tank 14 through a pipeline, the supernatant in the sludge tank 18 is backflowed to the adjusting tank 12 through a pipeline, sludge pipes are installed in the anaerobic tank 13, the anoxic tank 14, the aerobic tank 15 and the sedimentation tank 16, and the sludge pipes are in communication with the sludge tank 18, an output end of the air blower 19 is communicated with an air pipe, the air pipe is in communication with a sludge backflow pipe, a nitrification liquid backflow pipe and the aeration pipe respectively, and notches are formed in inner walls of the anaerobic tank 13, the anoxic tank 14, the aerobic tank 15 and the sedimentation tank 16 for sewage flow.

[0046] As Figures 1-5As shown, sewage is collected by pipe network and enters the grid pool 11, and solid pollutants in the sewage are crushed by the crushing assembly 3 to prevent the subsequent pipeline equipment from being blocked, the water in the grid pool 11 flows to the adjusting pool 12 for buffering and mixing, the mixed sewage is transported to the anaerobic tank 13 for anaerobic reaction, the delivery amount of the sewage pump can be adjusted in real time according to the water level in the adjusting pool 12, the organic matter in the sewage in the anaerobic tank 13 is hydrolyzed, acidified and methanated, so that the organic matter in the water is removed, then the backflow nitrification liquid is subjected to denitrification reaction in the anoxic tank 14, the organic matter is removed at the same time of denitrification, finally flows into the aerobic tank 15, air is transported into the aerobic tank 15 by the air blower 19, under the condition of aeration, fully contacts with the active sludge growing on the filler and the biofilm attached and growing on the carrier, and relies on the biodegradation to remove COD and NH3-N, the backflow of the nitrification liquid adopts the air-lift backflow mode, reduces the investment of the moving equipment, and utilizes the existing aeration equipment to lift the nitrification liquid, the effluent of the aerobic tank 15 enters the sedimentation tank 16 for purification and sedimentation, the suspended impurities and sludge in the water are sedimented in the tank, the separated sludge falls to the bottom of the tank under the action of gravity and is discharged, the treated water flows out along the tank body, the effluent water in the sedimentation tank 16 is sterilized and disinfected by the ultraviolet sterilizer, and then can be discharged or recycled, the sludge enters the sludge tank 18, the sludge is subjected to backflow endogenous digestion, the sludge discharge is reduced, the residual sludge is regularly pumped out by the sludge pump truck, two valves are installed on the surface of the sludge pipe for adjusting the flow direction of the sludge, in order to ensure the effluent effect, different specifications of fillers can be put in the anaerobic section, the anoxic section and the aerobic section, and the environment for the growth of microorganisms is provided, the equipment control is controlled by the PLC, the sewage treatment is controlled by the touch screen, the on-site unattended operation is realized, the equipment operation data can be uploaded to the remote monitoring intelligent management platform in real time through the wireless communication equipment, and the equipment can be remotely monitored and operated through the remote intelligent management platform.

[0047] Embodiment 2

[0048] Refer to Figures 2-5 As a second embodiment of the utility model, the embodiment is based on the previous embodiment.

[0049] In the embodiment, the inner cavity of the grid pool 11 is provided with the lifting assembly 2 and the crushing assembly 3, the crushing assembly 3 is used for crushing solid pollutants, and the lifting assembly 2 is used for lifting the crushing assembly 3.

[0050] The crushing assembly 3 comprises a frame 301, crushing rollers 302, baffles 303, a gear box 304, a motor box 305, a second motor 306, a second speed reducer 307 and transmission gears 308, the crushing assembly 3 is located at the bottom of the inner cavity of the grid pool 11, the number of the crushing rollers 302, the baffles 303 and the transmission gears 308 is two, the two crushing rollers 302 are installed in the inner cavity of the frame 301, the two baffles 303 are fixed on the two sides of the frame 301 respectively, the two transmission gears 308 are engaged and are installed in the inner cavity of the gear box 304, the second motor 306 and the second speed reducer 307 are installed in the inner cavity of the motor box 305, the gear box 304 is fixed on the top of the frame 301, and the motor box 305 is fixed on the top of the gear box 304.

[0051] One end of the crushing roller 302 is movably connected with the inner wall of the frame 301 through a bearing, the other end of the crushing roller 302 penetrates into the inner cavity of the gear box 304 and is fixedly connected with the transmission gear 308, the output shaft of the second motor 306 is in transmission connection with the input shaft of the second speed reducer 307, and the output shaft of the second speed reducer 307 penetrates into the inner cavity of the gear box 304 and is in transmission connection with one side of the transmission gear 308.

[0052] As shown in Figures 2-5 the drawings, solid pollutants enter into the inner cavity of the frame 301 under the guidance of the baffles 303 under the action of water flow, the output shaft of the second motor 306 rotates to drive one transmission gear 308 to rotate through the second speed reducer 307, since the two transmission gears 308 are engaged with each other, when one transmission gear 308 rotates, the other transmission gear 308 rotates following, the two transmission gears 308 rotate to drive the crushing rollers 302 to rotate in the inner cavity of the frame 301 at the same time, the two crushing rollers 302 crush the solid pollutants when rotating, so that the solid pollutants can be prevented from causing blockage to subsequent pipelines, and the impact of subsequent processes is reduced.

[0053] Embodiment 3

[0054] Referring to Figures 2-4 , this is a third embodiment of the utility model, and the embodiment is based on the previous two embodiments.

[0055] In the embodiment, the lifting assembly 2 comprises guide rails 201, supporting plates 202, winding boxes 203, first motors 204, first speed reducers 205, winding rollers 206, ropes 207, lifting lugs 208 and guide wheels 209, the number of the guide rails 201 is two, and the two guide rails 201 are fixed on the two sides of the inner cavity of the grid pool 11 respectively, the top of the guide rail 201 penetrates to the outside of the grid pool 11, the supporting plate 202 is fixed on the top of the guide rail 201, the winding box 203 is fixed on the top of the supporting plate 202, the winding roller 206 is installed in the inner cavity of the winding box 203, and the rope 207 is wound on the surface of the winding roller 206.

[0056] The first motor 204 and the first speed reducer 205 are fixed on one side of the winding box 203, the output shaft of the first motor 204 is in transmission connection with the input shaft of the first speed reducer 205, the output shaft of the first speed reducer 205 penetrates to the inner cavity of the winding box 203 and is in transmission connection with the winding roller 206, the winding roller 206 is movably connected with the inner wall of the winding box 203 through a bearing, the lifting lug 208 is fixed on the top of the frame 301, and one end of the rope 207 away from the winding roller 206 penetrates to the inner cavity of the grid pool 11 and is fixedly connected with the lifting lug 208.

[0057] The guide wheels 209 are installed on both sides of the frame 301 through bearings, one end of the guide wheels 209 away from the frame 301 extends to the inner cavity of the guide rail 201 and is movably connected with the inner cavity of the guide rail 201.

[0058] As shown in Figures 2-4 , the crushing assembly 3 can be regularly lifted from the inside to the outside of the grid pool 11 by the lifting assembly 2 for cleaning and maintenance, the output shaft of the first motor 204 rotates in the positive direction to drive the winding roller 206 to rotate in the inner cavity of the winding box 203 through the first speed reducer 205, the winding roller 206 drives the rope 207 to wind around the surface of the winding roller 206 when rotating, the rope 207 can adopt a steel wire rope or a chain, the frame 301 is driven to move upward by the lifting lug 208 while the rope 207 is winding, the frame 301 drives the guide wheels 209 to move upward along the inner cavity of the guide rail 201 when moving upward, so that the crushing assembly 3 can be lifted to the outside, facilitating subsequent cleaning and maintenance.

[0059] In use, sewage is collected through pipe network and enters the grid pool 11, solid pollutants in the sewage are crushed by the crushing assembly 3, so as to prevent the subsequent pipeline equipment from being blocked, the water in the grid pool 11 flows to the adjusting pool 12 for buffering and mixing, the mixed sewage is transported to the anaerobic tank 13 for anaerobic reaction, the delivery amount of the sewage pump can be adjusted in real time according to the water level in the adjusting pool 12, the organic matter in the sewage in the anaerobic tank 13 is hydrolyzed, acidified and methanated, so as to remove the organic matter in the water, then the backflow nitrification liquid is subjected to denitrification reaction in the anoxic tank 14, the organic matter is removed at the same time as nitrogen is removed, finally, the water flows into the aerobic tank 15, air is delivered into the aerobic tank 15 through the air blower 19, under the condition of aeration, the water fully contacts with the active sludge growing on the filler and the biofilm growing on the carrier, COD and NH3-N are removed by biological degradation, the backflow nitrification liquid adopts the air-lift backflow mode, the investment in moving equipment is reduced, the existing aeration equipment is utilized to lift the nitrification liquid, the effluent of the aerobic tank 15 enters the sedimentation tank 16 for purification and sedimentation, the suspended impurities and sludge in the water are sedimented in the tank, the separated sludge falls to the bottom of the tank under the action of gravity and is discharged, the treated water flows out along the tank, the water flowing out of the sedimentation tank 16 is sterilized and disinfected through the ultraviolet sterilizer, and then can be discharged or recycled, the sludge enters the sludge tank 18, the sludge is subjected to backflow endogenous digestion, the sludge discharge is reduced, the remaining sludge is regularly pumped out by the sludge pump truck, in order to ensure the effluent effect, different specifications of fillers can be put in the anaerobic section, the anoxic section and the aerobic section, and the environment for the growth of microorganisms is provided, the equipment control is controlled by the PLC, the sewage treatment is controlled through the touch screen, the on-site unattended operation is realized, the equipment operation data can be uploaded to the remote monitoring intelligent management platform in real time through the wireless communication equipment, and the equipment can be remotely monitored and operated through the remote intelligent management platform.

[0060] The standard parts used in the application file can be purchased from the market, and can be customized according to the description and drawings, and the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the mechanical parts and equipment adopt the conventional type in the prior art, the control mode is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming of the person skilled in the art, which belongs to the common knowledge in the art, and the application is mainly used to protect the mechanical device, so the control mode and circuit connection are not explained in detail.

[0061] Although the present application has been disclosed with the preferred embodiments, it is not intended to limit the present application. Those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the definition of the claims.

Claims

1. A rural domestic sewage purification device, comprising an integrated treatment component (1), characterized in that: The integrated treatment component (1) includes a bar screen (11), an equalization tank (12), an anaerobic tank (13), an anoxic tank (14), an aerobic tank (15), a sedimentation tank (16), an equipment box (17), a sludge tank (18), and a blower (19); The bar screen (11) is used to intercept solid pollutants in sewage; The equalization tank (12) is used to balance wastewater and mix wastewater from different sources; The anaerobic tank (13) is used for the hydrolysis, acidification and methanation of organic matter in wastewater; The anoxic tank (14) is used to provide a nitrification reaction to remove nitrogen from the wastewater; The aerobic tank (15) is used for biodegradation, and an aeration pipe is installed inside the aerobic tank (15); The sedimentation tank (16) is used for sludge sedimentation; The equipment box (17) is equipped with an ultraviolet sterilizer, a PLC controller, a touch screen and a wireless communication device. The ultraviolet sterilizer is used for water disinfection. The PLC controller, touch screen and wireless communication device are connected to a remote monitoring and management platform. The sludge tank (18) is used to store sludge; The blower (19) is used to provide air and nitrification liquid and sludge return to the aerobic tank (15); The wastewater inside the equalization tank (12) is pumped to the anaerobic tank (13) by a wastewater pump. The nitrified liquid inside the aerobic tank (15) is returned to the anoxic tank (14) through a pipe. The supernatant inside the sludge tank (18) is returned to the equalization tank (12) through a pipe. The anaerobic tank (13), anoxic tank (14), aerobic tank (15) and sedimentation tank (16) are all equipped with sludge pipes and are all connected to the sludge tank (18). The output end of the blower (19) is connected to the air pipe, and the air pipe is connected to the sludge return pipe, the nitrified liquid return pipe and the aeration pipe respectively. The inner walls of the anaerobic tank (13), anoxic tank (14), aerobic tank (15) and sedimentation tank (16) are all provided with openings for wastewater flow.

2. The rural domestic sewage purification equipment as described in claim 1, characterized in that: The inner cavity of the grid pool (11) is equipped with a lifting component (2) and a crushing component (3). The crushing component (3) is used to crush solid pollutants, and the lifting component (2) is used to lift the crushing component (3).

3. The rural domestic sewage purification equipment as described in claim 2, characterized in that: The crushing assembly (3) includes a frame (301), crushing rollers (302), baffles (303), a gearbox (304), a motor housing (305), a second motor (306), a second reducer (307), and a transmission gear (308). The crushing assembly (3) is located at the bottom of the inner cavity of the grid pool (11). Two crushing rollers (302), two baffles (303), and two transmission gears (308) are provided. The two crushing rollers (302) are mounted on... The two baffles (303) are fixed to the two sides of the frame (301) respectively, and the two transmission gears (308) are meshed and installed in the inner cavity of the gearbox (304). The second motor (306) and the second reducer (307) are installed in the inner cavity of the motor box (305). The gearbox (304) is fixed to the top of the frame (301), and the motor box (305) is fixed to the top of the gearbox (304).

4. The rural domestic sewage purification equipment as described in claim 3, characterized in that: One end of the crushing roller (302) is movably connected to the inner wall of the frame (301) through a bearing, and the other end of the crushing roller (302) passes through the inner cavity of the gearbox (304) and is fixedly connected to the transmission gear (308). The output shaft of the second motor (306) is drivenly connected to the input shaft of the second reducer (307). The output shaft of the second reducer (307) passes through the inner cavity of the gearbox (304) and is drivenly connected to the transmission gear (308) on one side.

5. The rural domestic sewage purification equipment as described in claim 2, characterized in that: The lifting assembly (2) includes a guide rail (201), a support plate (202), a winding box (203), a first motor (204), a first reducer (205), a winding roller (206), a rope (207), a lifting lug (208), and a guide wheel (209). There are two guide rails (201), which are fixed on both sides of the inner cavity of the grid pool (11). The top of the guide rail (201) extends through to the outside of the grid pool (11). The support plate (202) is fixed to the top of the guide rail (201). The winding box (203) is fixed to the top of the support plate (202). The winding roller (206) is installed in the inner cavity of the winding box (203). The rope (207) is wound around the surface of the winding roller (206).

6. The rural domestic sewage purification equipment as described in claim 5, characterized in that: The first motor (204) and the first reducer (205) are both fixed to one side of the winding box (203). The output shaft of the first motor (204) is connected to the input shaft of the first reducer (205). The output shaft of the first reducer (205) passes through the inner cavity of the winding box (203) and is connected to the winding roller (206). The winding roller (206) is movably connected to the inner wall of the winding box (203) through a bearing. The lifting lug (208) is fixed to the top of the frame (301). The end of the rope (207) away from the winding roller (206) passes through the inner cavity of the grid pool (11) and is fixedly connected to the lifting lug (208).

7. The rural domestic sewage purification equipment as described in claim 5, characterized in that: The guide wheel (209) is mounted on both sides of the frame (301) by bearings. The end of the guide wheel (209) away from the frame (301) extends into the inner cavity of the guide rail (201) and is movably connected to the inner cavity of the guide rail (201).

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