Single-drive multi-effect linkage type rural domestic sewage treatment device and method

Abstract

The application discloses a single-drive multi-effect linkage type rural domestic sewage treatment device and method, and belongs to the field of rural sewage treatment. The device comprises a device cavity, a mixing chamber, a filtrate chamber, a multi-directional cooperation stirring mechanism and a linkage stirring mechanism, a differential pressure driven one-way backflow valve is arranged between the mixing chamber and the filtrate chamber, a recirculation pump, a pumping pipeline and a distribution nozzle are arranged in the mixing chamber, and a filter dish with a fabric filter is arranged below. The single-drive motor is used for driving the filter dish to reciprocating rotate and the stirring paddle of the filtrate chamber to reciprocating stir through bevel gears, chain wheels and gear strips. After the sewage is pretreated in a septic tank, the sewage enters the mixing chamber, is filtered by the fabric filter through intermittent spraying at a small flow rate, and is automatically and fully backflowed and recycled for purification at a low flow rate period, and is discharged after reaching the standard. The device has the advantages of simple structure, low energy consumption, convenient maintenance, adaptation to the characteristics of large fluctuation of rural sewage, high treatment efficiency, stable operation, and suitability for popularization and use in rural areas.

Description

Technical Field

[0001] This invention relates to the field of rural sewage treatment, and more particularly to a single-drive, multi-effect linkage type rural domestic sewage treatment device and method. Background Technology

[0002] Rural domestic wastewater is characterized by dispersed residences, numerous and widespread sewage discharge points, significant diurnal and seasonal fluctuations in water volume, high levels of organic matter and suspended solids, and weak management and maintenance conditions, making it a key focus and challenge for rural ecological environment governance. Currently, decentralized rural domestic sewage often employs a simple treatment process combining septic tank pretreatment with filtration purification. This process relies on media such as fabric filter sheets to achieve solid-liquid separation and preliminary degradation of sewage. Due to its simple structure, low cost, and low maintenance threshold, it is widely used in rural areas.

[0003] However, existing traditional treatment devices generally have obvious technical defects: First, existing solutions alleviate the problem of sewage sedimentation through stirring mechanisms, but most of them require separate drive motors and matching transmission control components for the stirring unit. The multi-power layout leads to complicated pipelines and bulky structure, significantly increasing equipment manufacturing costs and daily operating energy consumption.

[0004] Meanwhile, existing conventional equipment generally lacks a dedicated scum treatment structure. After sedimentation and filtration, sewage easily forms floating flocs and scum on the liquid surface. Long-term accumulation can easily form a crust that seals the liquid surface, hindering water reoxygenation, inhibiting the activity of aerobic microorganisms, and also causing secondary pollution due to scum falling back. In addition, traditional equipment does not have an adaptive backflow adjustment structure. Under conditions of water outage at night or low flow rate, sewage stagnates and purification efficiency drops significantly, making it difficult to adapt to the operating conditions of large fluctuations in rural sewage volume.

[0005] In view of the many technical shortcomings of existing rural sewage treatment equipment, such as high energy consumption due to multiple power configurations, complex structure, easy sedimentation, difficulty in handling surface scum, poor adaptability to low flow conditions, and inconvenient operation and maintenance, this invention proposes a single-drive multi-effect linkage rural domestic sewage treatment device and method. Summary of the Invention

[0006] To address the technical problems of existing sewage mixing and filtration processes being independent, leading to sewage sedimentation and uneven media distribution within the mixing chamber, this invention provides a single-drive, multi-effect linkage rural domestic sewage treatment device and method.

[0007] This invention is achieved using the following technical solution: a single-drive multi-effect linkage rural domestic sewage treatment device and method. The single-drive multi-effect linkage rural domestic sewage treatment device includes a device cavity and an inlet on the device cavity. An inlet pipe is connected to the inlet, and the end of the inlet pipe away from the inlet is connected to a flow chamber. A mixing chamber is connected to the outside of the flow chamber. The device cavity is divided into a filtrate chamber, which is independent of the mixing chamber, by a partition. A return valve is installed on the partition. This return valve is a pressure differential driven one-way valve and only allows filtrate to flow from the filtrate chamber to the mixing chamber. The partition achieves chamber isolation before and after sewage filtration. The one-way return valve can achieve automatic filtrate return based on the liquid level pressure difference, without the need for additional power or manual operation. It can adapt to the characteristics of large fluctuations in rural sewage volume and ensure the circulation treatment of sewage during low flow periods.

[0008] As a further optimization of the present invention, a recirculation pump is installed inside the mixing chamber, and a pumping pipe is connected above the recirculation pump. A distribution nozzle is installed at the end of the pumping pipe away from the recirculation pump, and a filter dish is set below the distribution nozzle. A fabric filter plate is placed inside the filter dish, and filter holes are opened on the outer surface of the filter dish. The recirculation pump can realize the small-flow, intermittent delivery of sewage in the mixing chamber. The sewage is evenly sprayed onto the surface of the fabric filter plate through the distribution nozzle, which can accurately create an aerobic and unsaturated treatment environment in the device, provide suitable conditions for aerobic microbial metabolism, and improve sewage purification efficiency. The structure of the fabric filter plate and the filter dish provides the core filtration medium for sewage. The filtered sewage permeates downward into the filtrate chamber through the filter holes, realizing the initial purification of sewage.

[0009] As a further optimization of the present invention, a multi-directional stirring mechanism is fixedly installed on the outer wall of the device cavity. The multi-directional stirring mechanism includes a drive motor, a main bevel gear, a driven bevel gear, a shaft, and a shaft bracket. The drive motor and the shaft bracket are both fixedly installed on the outer wall of the device cavity. The main bevel gear is connected to the output end of the drive motor for transmission. The driven bevel gear meshes with the main bevel gear. The shaft passes through the shaft bracket and is fixedly connected to the driven bevel gear. The drive motor serves as the single power source for the entire device, transmitting power to the shaft through the meshing transmission of the bevel gear. The shaft bracket provides positioning support for the shaft, ensuring the stability of the transmission process. The single power source design avoids the addition of multiple power mechanisms, greatly simplifying the device structure and reducing manufacturing costs and energy consumption.

[0010] As a further optimization of the present invention, the multi-directional mixing mechanism also includes a first sprocket, a chain belt, a support frame, and a second sprocket. The first sprocket is fixedly sleeved on the top surface of the shaft, the support frame is rotatably mounted on the top of the shaft, the second sprocket is rotatably connected below the support frame, and the chain belt is sleeved on the surfaces of the first and second sprockets. Through the transmission structure of the sprocket and the chain belt, the rotational power of the shaft is stably transmitted to the subsequent components. The support frame provides support for the sprocket transmission structure, ensuring smooth transmission and realizing long-distance and stable power transmission.

[0011] As a further optimization of the present invention, the multi-directional mixing mechanism also includes a rotating shaft, a rotating shaft groove, a push-pull plate, a push-pull rod, and a fixing frame. The rotating shaft has a shaft extending downward from its center and passing through the support frame to connect with the second sprocket. The rotating shaft groove is formed on one end face of the rotating shaft. The bottom end of the push-pull plate has a locking block that engages with the rotating shaft groove. The fixing frame is fixedly installed at the top of the device cavity. The push-pull rod passes through the fixing frame and is fixedly connected to the push-pull plate. By utilizing the engaging cooperation between the rotating shaft and the push-pull plate, the rotational motion of the rotating shaft is converted into the reciprocating linear motion of the push-pull plate and the push-pull rod. The fixing frame provides sliding guidance for the push-pull rod, ensuring the smoothness of the linear motion and realizing the effective conversion of the power motion form, providing a power basis for subsequent linkage filtration and mixing.

[0012] As a further optimization of the present invention, the multi-directional stirring mechanism also includes a fixed crossbeam, a connecting frame, an upper gear rack, and a rotating gear. The fixed crossbeam is fixedly sleeved on the surface of the push-pull rod. One end of the connecting frame is fixedly connected to the fixed crossbeam, and the other end is fixedly connected to the upper gear rack. The rotating gear is rotatably connected below the fixed frame and meshes with the upper gear rack. The reciprocating linear motion of the push-pull rod is transmitted to the upper gear rack through the fixed crossbeam and the connecting frame, driving the upper gear rack to perform synchronous reciprocating linear motion. Then, through the meshing of the upper gear rack and the rotating gear, the linear motion is converted back into rotational motion, realizing a secondary conversion of the power motion form, providing power for the rotation of the filter dish, and improving the filtration efficiency.

[0013] As a further optimization of the present invention, the multi-directional mixing mechanism also includes a receiving frame and a locking claw. The bottom end of the receiving frame is connected to the rotating gear, and the outer side of the receiving frame is integrally formed and fixedly extended with a locking claw. A locking groove is opened on the filter dish, and the locking claw is locked in the locking groove. The rotational power of the rotating gear is transmitted to the locking claw through the receiving frame, causing the filter dish to rotate synchronously with the locking claw, so that the fabric filter sheet is in full contact with the sewage, avoiding local accumulation of the filter medium, improving filtration efficiency and uniformity. At the same time, the locking and engaging structure of the locking claw and the locking groove realizes convenient disassembly and replacement of the filter dish and the fabric filter sheet, reducing the difficulty of operation and maintenance of the device and adapting to the daily maintenance needs of rural areas.

[0014] As a further optimization of the present invention, the multi-directional mixing mechanism is fixedly connected to the linkage frame of the linkage mixing mechanism via an upper gear rack to achieve linkage. The linkage mixing mechanism includes a support bracket, a linkage frame, a lower gear rack, a rotating gear, a mixing shaft, and a mixing blade. The two ends of the support bracket are fixedly connected to the lower part of the fixed frame. The top end of the linkage frame is fixedly connected to the upper gear rack, and the bottom end is fixedly connected to the lower gear rack. The mixing shaft is rotatably connected to the support bracket. The rotating gear is fixedly sleeved on the surface of the mixing shaft and meshes with the lower gear rack. The mixing blade is fixed on the surface of the mixing shaft and located in the filtrate chamber. The reciprocating linear motion of the upper gear rack synchronously drives the linkage frame and the lower gear rack to reciprocate. Through the meshing of the lower gear rack and the rotating gear, the mixing shaft and the mixing blade are driven to reciprocate in the filtrate chamber, realizing the linkage of filtration and mixing from a single power source. This allows the pre-purified wastewater in the filtrate chamber to fully integrate and evenly distribute with the suspended impurities, effectively preventing impurities from settling and accumulating. This ensures that the wastewater being transported to the fabric filter again has uniform quality, further improving the treatment effect and stability of the circulating filtration.

[0015] As a further optimization of the present invention, a scum cleaning mechanism is fixedly installed at the bottom of the fixed crossbeam. The scum cleaning mechanism consists of a connecting rod, a connecting plate, a pull-out groove, a pull-out plate, a cleaning plate surface, and scum cleaning brushes. The top of the connecting rod is fixedly connected to the fixed crossbeam, and the bottom is connected to the connecting plate. A transverse pull-out groove is opened on the inner side of the connecting plate. The pull-out plate is slidably engaged in the pull-out groove and can be pulled out and disassembled. Multiple sets of scum cleaning brushes with adsorption and adhesion properties are arranged on the outer side of the pull-out plate through the cleaning plate surface. Relying on a single drive motor for linkage transmission, the reciprocating linear motion of the fixed crossbeam synchronously drives the scum cleaning brush to reciprocate laterally across the liquid surface in the filtrate chamber. Combined with the agitation and stirring action of the stirring blades in the filtrate chamber, light suspended impurities in the water float to the surface and accumulate to form scum. The scum cleaning brush uses its own adsorption properties to firmly adhere the scum to the brush bristles, preventing the scum from drifting back and falling, and preventing the scum from forming a crust on the liquid surface, thus ensuring smooth gas-liquid exchange and a stable aerobic environment. At the same time, the pull-out disassembly structure allows the pull-out plate, along with the cleaning plate and the scum cleaning brush, to be pulled out as a whole, facilitating the cleaning and maintenance of the brush with scum adhering to it. After being reassembled, it can be reused. The structure is simple.

[0016] As a further optimization of the present invention, the wastewater treatment method using the above-mentioned single-drive multi-effect linkage rural domestic wastewater treatment device includes five steps: wastewater transportation, micro-dosing, linkage stirring and filtration, filtrate distribution and return, and discharge meeting standards. Each step operates in coordination, and the wastewater circulation purification and automatic regulation are achieved by relying on the structural design of the device. The filtrate distribution and return steps are achieved by the automatic opening and closing of the return valve through the pressure difference. When the daily flow rate is low or there is no influent, the liquid level in the filtrate chamber is higher than that in the mixing chamber, the return valve opens and achieves 100% filtrate return. When the liquid level in the mixing chamber is equal to or higher than that in the filtrate chamber, the return valve automatically closes. This method does not require additional power or manual intervention, and can keep the wastewater in the device in dynamic flow at all times, maintain the activity of aerobic microorganisms, and ensure the continuity and stability of wastewater treatment.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention designs a single-power-source linkage structure for a multi-directional cooperating stirring mechanism and a linked stirring mechanism. Using a drive motor as the sole power source, the rotation of the filter dish and the reciprocating stirring of the stirring blades are simultaneously achieved through sequential transmission via bevel gears, sprockets, and gear racks. This overcomes the drawback of traditional devices where mixing and filtration are independent. The stirring blades ensure that the pre-purified wastewater in the filtrate chamber is fully mixed and evenly distributed with suspended impurities, effectively preventing impurity sedimentation and ensuring uniform wastewater quality when it is re-transported to the fabric filter, further improving the treatment effect and stability of the circulating filtration.

[0018] 2. This invention abandons the traditional design of adding an independent power source for stirring in improved devices. Through a linkage structure, filtration and stirring share a power system, eliminating the need for additional drive equipment. This simplifies the overall structure of the device and significantly reduces the manufacturing cost and operating energy consumption of the equipment.

[0019] 3. The present invention adopts a modular snap-fit ​​and socket-fitting method for both the transmission component and the filter component, such as the fit between the snap-fit ​​claw and the slot, which makes it convenient to disassemble and replace vulnerable parts such as filter dishes and fabric filter sheets, which meets the actual application needs of rural areas for simple daily maintenance and low operation threshold.

[0020] 4. This invention utilizes a pressure-differential driven one-way reflux valve between the mixing chamber and the filtrate chamber. The reflux valve automatically opens and closes based on the liquid level difference between the two chambers, requiring no additional power or manual intervention. During periods of low flow or no influent in rural sewage, 100% of the filtrate from the filtrate chamber is returned to the mixing chamber, ensuring continuous dynamic flow of sewage within the device. This prevents sedimentation caused by stagnant sewage and maintains the activity of aerobic microorganisms within the device. This addresses the industry pain point of poor treatment efficiency during low flow periods, enabling the device to adapt to the large fluctuations in rural sewage volume and ensuring continuous sewage treatment.

[0021] 5. This invention uses a recirculation pump to transport wastewater from the mixing chamber at a low flow rate and intermittently. The wastewater is then evenly sprayed onto the surface of the fabric filter through distribution nozzles, precisely creating an aerobic, unsaturated treatment environment within the device. This provides suitable conditions for aerobic microbial metabolism and improves wastewater purification efficiency. Simultaneously, the water quality homogenization effect brought about by the linkage stirring allows the filtration and purification function of the fabric filter to be fully utilized. Wastewater filtered through multiple cycles can stably meet rural domestic wastewater treatment standards.

[0022] 6. This invention utilizes the reciprocating motion of a fixed crossbeam to synchronously drive the scum cleaning brush to move back and forth across the liquid surface in the filtrate chamber. Combined with the stirring action of the agitator blades, suspended impurities are agitated and float to the surface, forming scum. The scum cleaning brush possesses excellent adsorption and adhesion properties, firmly adhering to and collecting the scum on the liquid surface, effectively preventing scum from forming a crust and obstructing the reoxygenation channels. Furthermore, the scum cleaning mechanism adopts a pull-out sliding detachable structure, allowing the pull-out plate, cleaning plate, and scum cleaning brush to be extracted and disassembled as a whole. This facilitates manual rinsing and cleaning, simplifies maintenance, and allows the brush to be reused, significantly reducing on-site maintenance costs in rural areas.

[0023] 7. This invention uses only a single drive motor as the sole power source, and through multi-stage transmission, it achieves synchronous linkage of the multi-directional stirring mechanism, the linkage stirring mechanism, and the scum cleaning mechanism. It can simultaneously complete three functions: rotating filter dish for quality improvement filtration, stirring blade agitation to prevent siltation, and scum cleaning brush adsorption and scum removal on the liquid surface. The single power drive enables multiple mechanisms to work together, resulting in a simplified structure. This not only avoids secondary pollution from impurity deposition and scum crusting, but also significantly improves the overall stability and purification effect of wastewater treatment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a detailed structural diagram of the filter dish of the present invention; Figure 3 This is a schematic diagram of the partition connection structure of the present invention; Figure 4 For the present invention Figure 2 Enlarged schematic diagram of the structure of region A in the middle; Figure 5 For the present invention Figure 2 Enlarged schematic diagram of the structure of region B in the middle; Figure 6 This is a schematic diagram of the gear rack connection structure of the present invention; Figure 7 This is a schematic diagram of the filter dish connection structure of the present invention; Figure 8 For the present invention Figure 2 Enlarged schematic diagram of the structure of region C in the middle; Figure 9 This is a schematic diagram of the connection structure of the linkage stirring mechanism of the present invention; Figure 10 This is a schematic diagram of the connection structure of the scum removal mechanism of the present invention; Figure 11 For the present invention Figure 11 Schematic diagram of the middle section of the structure; Figure 12 This is a schematic diagram of the scum removal mechanism of the present invention in a detachable state.

[0025] Explanation of key symbols: 1. Device chamber; 2. Inlet; 3. Inlet pipe; 4. Flow chamber; 5. Mixing chamber; 6. Filtration chamber; 7. Partition; 8. Return valve; 9. Recirculation pump; 10. Pumping pipe; 11. Distributor nozzle; 12. Multi-directional mixing mechanism; 121. Drive motor; 122. Main bevel gear; 123. Driven bevel gear; 124. Shaft; 1241. Shaft bracket; 125. First sprocket; 126. Chain belt; 127. Support frame; 1251. Second sprocket; 128. Rotating shaft; 129. Rotating shaft groove; 1210. Push-pull plate; 1211. Push-pull rod; 1212. Fixing frame; 1213. Fixing 1214. Crossbeam; 1215. Connecting frame; 1216. Upper gear rack; 1217. Rotating gear; 1218. Receiving frame; 1219. Clamping claw; 1220. Filter dish; 1221. Clamping groove; 1222. Filter hole; 1222. Fabric filter sheet; 13. Linkage stirring mechanism; 131. Linkage frame; 132. Lower gear rack; 133. Rotating gear; 134. Stirring shaft; 135. Stirring blade; 136. Receiving bracket; 14. Scum cleaning mechanism; 141. Connecting rod; 142. Connecting plate; 143. Pull-out slide; 144. Pull-out plate; 145. Cleaning plate surface; 146. Scum cleaning brush. Detailed Implementation

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] Example 1:

[0028] Please combine Figures 1-9 This embodiment proposes a single-drive multi-effect linkage type rural domestic sewage treatment device, including a device cavity 1 and an inlet 2. An inlet pipe 3 is connected to the inlet 2. The end of the inlet pipe 3 away from the inlet 2 is connected to a flow chamber 4. A mixing chamber 5 is connected to the outside of the flow chamber 4. A filtrate chamber 6 is also provided in the device cavity 1, which is separated from the mixing chamber 5. A partition 7 is provided between the mixing chamber 5 and the filtrate chamber 6. A return valve 8 is installed on the partition 7. The return valve 8 is a pressure differential driven one-way valve. Its conduction direction is from the filtrate chamber 6 to the mixing chamber 5, and it only allows the filtrate to flow from the filtrate chamber 6 to the mixing chamber 5.

[0029] Furthermore, after being treated in the three-compartment septic tank, rural domestic sewage enters through the inlet 2 of the device chamber 1, is transported to the overflow chamber 4 through the inlet pipe 3, and finally flows into the mixing chamber 5 of the device to complete the initial transportation and temporary storage of sewage. The partition 7 divides the device chamber 1 into an independent mixing chamber 5 and a filtrate chamber 6, and the effluent in the mixing chamber 5 can only enter the filtrate chamber 6 after being filtered by the subsequent filtration components.

[0030] A recirculation pump 9 is installed inside the mixing chamber 5. A pumping pipe 10 is connected above the recirculation pump 9. A distribution nozzle 11 is installed at the end of the pumping pipe 10 away from the recirculation pump 9. A filter dish 1219 is provided below the distribution nozzle 11. A fabric filter sheet 1222 is placed inside the filter dish 1219.

[0031] Specifically, the effluent from the mixing chamber 5 is transported to the distribution nozzle 11 via the pumping pipe 10 by the recirculation pump 9. The distribution nozzle 11 sprays the effluent evenly onto the fabric filter 1222 inside the filter dish 1219. This process adopts a micro-dosing design to ensure that the device is always in an aerobic and unsaturated treatment environment, laying the foundation for efficient wastewater purification.

[0032] A multi-directional stirring mechanism 12 is fixedly installed on the outer wall of the device cavity 1. The multi-directional stirring mechanism 12 includes a drive motor 121, a main bevel gear 122, a driven bevel gear 123, a shaft 124, and a shaft bracket 1241. The drive motor 121 and the shaft bracket 1241 are both fixedly installed on the outer wall of the device cavity 1. The main bevel gear 122 is connected to the output end of the drive motor 121. The driven bevel gear 123 meshes with the main bevel gear 122. The shaft 124 passes through the shaft bracket 1241 and is fixedly connected to the driven bevel gear 123. The drive motor 121 is the core power source of the multi-directional stirring mechanism 12. After starting, it drives the main bevel gear 122 to rotate. The driven bevel gear 123, which meshes with the main bevel gear 122, rotates synchronously, thereby driving the shaft 124 to rotate. The shaft bracket 1241 provides positioning support for the shaft 124 to ensure its rotational stability.

[0033] The multi-directional mixing mechanism 12 also includes a first sprocket 125, a chain belt 126, a support frame 127, and a second sprocket 1251. The first sprocket 125 is fixedly sleeved on the top surface of the shaft 124. The support frame 127 is rotatably mounted on the top of the shaft 124. The second sprocket 1251 is rotatably connected below the support frame 127. The chain belt 126 is sleeved on the surfaces of the first sprocket 125 and the second sprocket 1251. When the shaft 124 rotates, the first sprocket 125 on its surface drives the second sprocket 1251 to rotate through the chain belt 126. The support frame 127 provides stable support for the sprocket drive structure, ensuring smooth transmission.

[0034] The multi-directional mixing mechanism 12 also includes a rotating shaft 128, a rotating shaft groove 129, a push-pull plate 1210, a push-pull rod 1211, and a fixing frame 1212. A shaft extends downward from the center of the rotating shaft 128. The shaft passes through the support frame 127 and is connected to the second sprocket 1251. The rotating shaft groove 129 is opened on one end surface of the rotating shaft 128. A locking block extends from the bottom end of the push-pull plate 1210 and is locked in the rotating shaft groove 129. The fixing frame 1212 is fixedly installed at the top of the device cavity 1. The push-pull rod 1211 passes through the fixing frame 1212 and is fixedly connected to the push-pull plate 1210. The second sprocket 1251 passes through the center of the rotating shaft 128, causing the rotating shaft 128 to rotate. The rotating shaft groove 129 opened at one end of the rotating shaft 128 engages with the locking block at the bottom of the push-pull plate 1210. As the rotating shaft 128 rotates, the push-pull plate 1210 performs reciprocating lateral movement, which drives the push-pull rod 1211 connected to it to slide synchronously back and forth inside the fixed frame 1212. The fixed frame 1212 provides sliding guidance for the push-pull rod 1211.

[0035] The multi-directional mixing mechanism 12 also includes a fixed crossbeam 1213, a connecting frame 1214, an upper gear rack 1215, and a rotating gear 1216. The fixed crossbeam 1213 is fixedly sleeved on the surface of the push-pull rod 1211. One end of the connecting frame 1214 is fixedly connected to the fixed crossbeam 1213, and the other end is fixedly connected to the upper gear rack 1215. The rotating gear 1216 is rotatably connected below the fixed frame 1212 and meshes with the upper gear rack 1215. The fixed crossbeam 1213, which is fixedly sleeved on the surface of the push-pull rod 1211, moves back and forth synchronously with the push-pull rod 1211, thereby driving the connecting frame 1214 and the upper gear rack 1215 to perform reciprocating linear motion. The upper gear rack 1215 meshes with the rotating gear 1216, converting the linear motion into rotational motion, and driving the rotating gear 1216 to rotate back and forth.

[0036] The multi-directional mixing mechanism 12 also includes a receiving frame 1217, a locking claw 1218, a filter dish 1219, and a filter hole 1221. The bottom end of the receiving frame 1217 is connected to the rotating gear 1216. The outer side of the receiving frame 1217 is integrally formed and fixedly extended with the locking claw 1218. A slot 1220 is opened on the filter dish 1219, and the locking claw 1218 is locked in the slot 1220. The fabric filter sheet 1222 is placed in the filter dish 1219. The filter hole 1221 is opened on the outer surface of the filter dish 1219. After the water from the distributing nozzle 11 sprays onto the fabric filter sheet 1222, it flows downward through the filter hole 1221.

[0037] It should be noted that the rotating gear 1216 drives the locking claw 1218 to rotate synchronously through the receiving frame 1217. The locking claw 1218 is locked in the slot 1220 of the filter dish 1219, which not only fixes the filter dish 1219, but also drives the filter dish 1219 to rotate synchronously with the movement of the locking claw 1218. After the water sprayed from the distribution nozzle 11 enters the filter dish 1219, it permeates through the fabric filter sheet 1222 to complete the core filtration and purification. The rotation of the filter dish 1219 improves the filtration efficiency. The filtered water finally flows out downward through the filter holes 1221 of the filter dish 1219. At the same time, the matching structure of the locking claw and the slot facilitates the disassembly and replacement of the filter dish 1219 and the fabric filter sheet 1222.

[0038] Furthermore, the multi-directional mixing mechanism 12 and the linkage mixing mechanism 13 are linked and cooperated. The linkage mixing mechanism 13 includes a support bracket 136, which supports the linkage mixing mechanism 13. Both ends of the support bracket 136 are fixedly connected to the lower part of the fixed frame 1212. The support bracket 136 provides a stable installation support foundation for each component of the linkage mixing mechanism 13.

[0039] The bottom end of the fixed crossbeam 1213 is fixed to the scum cleaning mechanism 14, which includes a connecting rod 141, a connecting plate 142, a pull-out slide 143, a pull-out plate 144, a cleaning plate surface 145, and a scum cleaning brush 146. The top end of the connecting rod 141 is fixedly connected to the fixed crossbeam 1213, and the bottom end of the connecting rod 141 is vertically fixedly connected to the connecting plate 142; a horizontally arranged pull-out groove 143 is opened inside the connecting plate 142, and a detachable pull-out plate 144 is slidably installed in the pull-out groove 143; a cleaning plate surface 145 is fixedly extended to the outside of the pull-out plate 144, and a scum cleaning brush 146 is densely distributed on the outside of the cleaning plate surface 145.

[0040] In the specific technical solution, during the reciprocating lateral movement of the fixed crossbeam 1213, the scum cleaning mechanism 14 connected to the bottom end moves synchronously, causing the scum cleaning brush 146 to continuously reciprocate laterally at the liquid surface position in the filtrate chamber 6. At the same time, the stirring blades 135 of the linkage stirring mechanism 13 continuously agitate the water in the filtrate chamber 6, causing light suspended solids and colloidal impurities in the pre-filtered wastewater to float to the water surface and form scum. During the lateral movement, the scum cleaning brush 146, which has adsorption and adhesion properties, can actively contact and adsorb the floating scum on the water surface, so that the scum is firmly adhered to the brush surface, preventing the scum from drifting away randomly and falling back into the water, and also preventing the scum from accumulating on the liquid surface, ensuring smooth gas-liquid exchange on the liquid surface and maintaining a stable aerobic environment inside the device.

[0041] A further technical solution is provided: the scum cleaning mechanism 14 adopts a pull-out detachable structure design. The connecting plate 142 has a pull-out groove 143 inside, and the pull-out plate 144 is slidably locked in the pull-out groove 143. When cleaning is required, the pull-out plate 144, together with the cleaning plate surface 145 and the scum cleaning brush 146 with attached scum, can be pulled out as a whole to facilitate rinsing and cleaning of the scum adhering to the brush surface. After cleaning, it can be reinstalled in the original position and can be reused repeatedly. It is simple to disassemble and assemble, convenient to maintain, and suitable for rural use scenarios with low maintenance costs.

[0042] The linkage stirring mechanism 13 also includes a linkage frame 131, a lower gear rack 132, a rotating gear 133, a stirring shaft 134, and a stirring blade 135. The top end of the linkage frame 131 is fixedly connected to the upper gear rack 1215, and the bottom end is fixedly connected to the lower gear rack 132. The stirring shaft 134 is rotatably connected to the support bracket 136. The rotating gear 133 is fixedly sleeved on the surface of the stirring shaft 134 and meshes with the lower gear rack 132. The stirring blade 135 is fixed on the surface of the stirring shaft 134 and located in the filtrate chamber 6. The reciprocating linear motion of the upper gear rack 1215 drives the linkage frame 131 and the lower gear rack 132 to move synchronously. When the upper gear rack 1215 of the multi-directional stirring mechanism 12 reciprocates linearly, it synchronously drives the linkage frame 131 to move. The linkage frame 131 then pulls the lower gear rack 132 to reciprocate. The lower gear rack 132 meshes with the rotating gear 133, driving the rotating gear 133 to rotate reciprocally. The rotating gear 133 drives the stirring shaft 134 to rotate, ultimately causing the stirring blades 135 on the surface of the stirring shaft 134 to reciprocate stirring in the filtrate chamber 6. This allows the pre-purified wastewater in the filtrate chamber 6 to fully mix and evenly distribute with the suspended impurities, effectively preventing impurities from settling and accumulating. This ensures that the wastewater being transported to the fabric filter 1222 again has uniform water quality, further improving the treatment effect and stability of the circulating filtration.

[0043] In summary, the core of this invention lies in the fact that the entire machine uses only a single drive motor 121 as the sole power input. Through multi-stage transmission coupling of bevel gears, sprockets and chains, and rack and pinions, the multi-directional stirring mechanism 12, the linkage stirring mechanism 13, and the scum cleaning mechanism 14 are mechanically synchronized and linked. Under the same set of reciprocating linear motion drive, the three major functions are completed simultaneously: First, the filter dish 1219 is driven to rotate back and forth, so that the sewage can fully contact the fabric filter 1222, thereby improving the uniformity of surface filtration and treatment efficiency. Second, it drives the internal stirring blades 135 of the filtrate chamber 6 to stir back and forth, so that the suspended impurities in the water are uniformly dispersed, avoiding bottom sedimentation and ensuring the stability of the circulating water quality. Third, the scum cleaning mechanism 14 is moved laterally in sync, so that the scum cleaning brush 146 with adsorption properties moves back and forth on the liquid surface. Combined with stirring and agitation, it causes impurities to float to the surface and form scum. The scum cleaning brush 146 is used to adsorb and adhere to collect the scum on the liquid surface, preventing the scum from forming a crust, blocking the reoxygenation channel, and causing secondary pollution.

[0044] Example 2:

[0045] Based on the device in Example 1, this embodiment makes targeted structural applications and working mode limitations on the backflow valve 8 on the partition 7, which solves the industry pain points of large fluctuations in rural domestic sewage volume and poor treatment effect during low flow or no water inlet periods. Moreover, no additional power or manual operation is required throughout the process, which is suitable for the actual use needs of rural sewage treatment.

[0046] In this embodiment, the reflux valve 8 is a one-way valve structure, which only allows the filtrate to flow unidirectionally from the filtrate chamber 6 to the mixing chamber 5. It adopts a pure pressure differential driven automatic opening and closing method. Its specific working coordination and practical application advantages are as follows: Rural domestic sewage exhibits significant flow fluctuations, with high water consumption and continuous inflow during the day, but low water consumption or even prolonged periods without inflow at night. If the sewage in the device remains stagnant during these times, it will not only cause impurities to settle but also deactivate the aerobic microorganisms within the device, affecting subsequent treatment effectiveness. In this embodiment, the reflux valve 8 can automatically adjust its opening and closing based on the liquid level difference between the mixing chamber 5 and the filtrate chamber 6. When the influent flow rate is low or there is no influent, the filtrate in the filtrate chamber 6 accumulates continuously, and the liquid level will be higher than that in the mixing chamber 5. The water pressure difference formed on both sides will directly push the reflux valve 8 open. At this time, all the filtrate in the filtrate chamber 6 will flow back to the mixing chamber 5 100% to continue participating in the circulating filtration process, keeping the sewage in the device in a dynamic flow state. This avoids the sedimentation of impurities and maintains the activity of microorganisms, ensuring the continuity of sewage treatment. When the influent resumes and the sewage volume in the mixing chamber 5 increases, and the liquid level reaches or exceeds that in the filtrate chamber 6, the water pressure difference on both sides disappears, and the reflux valve 8 will automatically close based on its own structural characteristics, stopping the filtrate reflux. This ensures that the sewage in the mixing chamber 5 can be filtered normally by the filter components and then enter the filtrate chamber 6 to complete the normal purification and distribution process.

[0047] Compared to existing technologies, this invention achieves fully automatic start-up, shutdown, and filtrate circulation solely through liquid level differences. This simplifies the overall structure of the device, significantly reducing manufacturing and maintenance costs. Furthermore, it precisely adapts to the flow characteristics of rural domestic sewage, effectively solving the problems of sewage settling and unstable treatment effects during low-flow periods. This allows the device to maintain stable purification performance under different influent conditions, better meeting the actual scenarios and usage needs of rural sewage treatment.

[0048] Example 3:

[0049] This embodiment proposes a single-drive multi-effect linkage rural domestic sewage treatment method, applied to the single-drive multi-effect linkage rural domestic sewage treatment device of any one of Embodiments 1-2. The method includes the following steps: Step 1: Sewage Transportation Rural domestic sewage is pretreated in a three-compartment septic tank and then enters through the inlet 2 of the device chamber 1. It flows through the inlet pipe 3 and the overflow chamber 4 into the mixing chamber 5 for temporary storage, completing the initial transportation of sewage. The pretreated sewage removes large particulate impurities, reducing the load on subsequent filtration and purification.

[0050] Step 2: Micro-dosing Wastewater in mixing chamber 5 is transported by recirculation pump 9 in a low-flow, intermittent manner, and then evenly sprayed onto the surface of fabric filter 1222 in filter dish 1219 through distribution nozzle 11 via pumping pipe 10. This dosing method can precisely create an aerobic, unsaturated treatment environment in the device, providing suitable conditions for the metabolism of aerobic microorganisms in wastewater and laying the reaction foundation for efficient wastewater purification.

[0051] Step 3: Combined stirring and filtration to remove slag The multi-directional stirring mechanism 12 is activated, and the drive motor 121 drives the push-pull rod 1211 to slide back and forth through various transmission components, which in turn drives the upper gear rack 1215 to perform reciprocating linear motion. On one hand, it drives the rotating gear 1216 to drive the filter dish 1219 to rotate back and forth, so that the sewage can fully contact the fabric filter 1222, improve the filtration efficiency, and the filtered sewage flows into the filtrate chamber 6 through the filter holes 1221. On the other hand, the upper gear rack 1215 synchronously drives the stirring blades 135 of the linkage stirring mechanism 13 in the filtrate chamber 6. The internal reciprocating stirring causes suspended impurities in the water to rise to the surface and form scum. At the same time, the fixed crossbeam 1213 moves synchronously with the push-pull rod 1211, causing the scum cleaning mechanism 14 to move horizontally back and forth on the surface of the filtrate chamber 6. The scum cleaning brush 146 uses its own adsorption properties to adhere and gather the scum on the water surface, preventing the scum from forming a crust and falling back into the water, thus ensuring smooth reoxygenation of the liquid surface. In addition, the pull plate 144 can be pulled out and disassembled along the pull slide 143, which is convenient for rinsing and maintaining the scum cleaning brush 146 and can be reused. Step 4: Filtrate Distribution and Reflux After being filtered by the fabric filter 1222, the effluent permeates downwards and enters the filtrate chamber 6. When the daily flow rate is low or there is no influent, the liquid level in the filtrate chamber 6 is higher than that in the mixing chamber 5. The return valve 8 opens under the action of pressure difference, and 100% of the filtrate is returned to the mixing chamber 5 for continued circulation. When the liquid level in the mixing chamber 5 is equal to or higher than that in the filtrate chamber 6, the return valve 8 automatically closes and stops the return. Through the pressure difference drive without power, the automatic balance adjustment and circulation treatment of sewage is realized.

[0052] Step 5: Achieve emission standards After multiple cycles of filtration and purification, the pollutant content in the wastewater is reduced to the relevant standards for rural domestic sewage treatment. The treated water that meets the standards is directly discharged from the filtrate chamber 6, completing the entire rural domestic sewage treatment process.

[0053] To better understand the technical solution of this invention, the overall working principle of this invention is as follows: This single-drive, multi-effect, linkage-type rural domestic sewage treatment device uses fabric filter sheets as the core treatment medium. It relies on micro-dose circulating dosing to create an aerobic, unsaturated treatment environment. Simultaneously, the multi-directional mixing mechanism 12 and the linkage mixing mechanism 13 work together to enhance the sewage mixing and filtration effects. Furthermore, a scum removal mechanism 14 is added, synchronized with the power transmission system, to automatically and repeatedly scrape away scum from the liquid surface. The coordinated operation of these multiple structures achieves efficient purification of rural domestic sewage. The working principle of each structure is as follows: After being treated in a three-compartment septic tank, rural domestic sewage enters through the inlet 2 of chamber 1, is transported through the inlet pipe 3 to the overflow chamber 4, and finally flows into the mixing chamber 5 of the device, completing the initial transportation and temporary storage of sewage.

[0054] The effluent from the mixing chamber 5 is pumped by the recirculation pump 9 through the pumping pipe 10 to the distribution nozzle 11. The distribution nozzle 11 is located directly above the filter dish 1219. The water from the distribution nozzle 11 flows slowly and evenly, and the water flow will not splash to the outside of the filter dish 1219. The distribution nozzle 11 sprays the effluent slowly and evenly onto the fabric filter sheet 1222 inside the filter dish 1219 of the multi-directional stirring mechanism 12. This process continues the micro-dosing design to ensure that the device is always in an aerobic and unsaturated treatment environment, laying the foundation for efficient wastewater purification.

[0055] The multi-directional stirring mechanism 12 is the core power and filtration linkage component. Its drive motor 121 is installed on the outer wall of the device cavity 1. After starting, it drives the main bevel gear 122 to rotate. The driven bevel gear 123, which meshes with the main bevel gear 122, rotates synchronously, thereby driving the shaft 124 to rotate. The shaft 124 is positioned and supported by the shaft frame 1241 installed on the outer wall of the device cavity 1. When the shaft 124 rotates, the first sprocket 125 on its surface drives the second sprocket 1251 to rotate through the chain belt 126. The support frame 127 provides stable support for the sprocket transmission structure. The second sprocket 1251 passes through the center of the rotating shaft 128, driving the rotating shaft 128 to rotate. The rotating shaft groove 129 opened at one end of the rotating shaft 128 engages with the locking block at the bottom of the push-pull plate 1210. As the rotating shaft 128 rotates, the push-pull plate 1210 performs reciprocating lateral movement, and drives the push-pull rod 1211 connected to it to slide synchronously back and forth inside the fixed frame 1212.

[0056] The fixed crossbeam 1213, which is fixedly sleeved on the surface of the push-pull rod 1211, moves back and forth synchronously with the push-pull rod 1211, thereby driving the connecting frame 1214 and the upper gear rack 1215 to perform reciprocating linear motion. The upper gear rack 1215 meshes with the rotating gear 1216, converting the linear motion into rotational motion, driving the rotating gear 1216 to rotate reciprocally. The rotating gear 1216 drives the locking claw 1218 to rotate synchronously through the receiving frame 1217. The locking claw 1218 is locked in the slot 1220 of the filter dish 1219, which not only fixes the filter dish 1219, but also drives the filter dish 1219 to rotate synchronously with the movement of the locking claw 1218. At the same time, it facilitates the disassembly and replacement of the filter dish 1219 and the fabric filter sheet 1222. After the water sprayed from the distribution nozzle 11 enters the filter dish 1219, it permeates through the fabric filter 1222 to complete the core filtration and purification. With the help of the locking claw 1218, the filter dish 1219 rotates back and forth, and the filtered water finally flows out downward through the filter holes 1221 of the filter dish 1219.

[0057] Meanwhile, during the reciprocating lateral movement of the fixed crossbeam 1213, the scum cleaning mechanism 14 connected to the bottom end moves in tandem, causing the scum cleaning brush 146 to continuously reciprocate laterally at the liquid surface position in the filtrate chamber 6. At the same time, the stirring blades 135 of the linkage stirring mechanism 13 continuously agitate the water in the filtrate chamber 6, causing light suspended solids and colloidal impurities in the pre-filtered wastewater to float to the water surface and form scum. During the lateral movement, the scum cleaning brush 146, which has adsorption and adhesion properties, can actively contact and adsorb the floating scum on the water surface, so that the scum is firmly adhered to the brush surface, preventing the scum from drifting away randomly and falling back into the water, and also preventing the scum from forming a crust on the liquid surface, ensuring smooth gas-liquid exchange on the liquid surface and maintaining a stable aerobic environment inside the device.

[0058] The scum cleaning mechanism 14 adopts a pull-out detachable structure design. The connecting plate 142 has a pull-out groove 143 inside, and the pull-out plate 144 is slidably locked in the pull-out groove 143. When cleaning is required, the pull-out plate 144, together with the cleaning plate surface 145 and the scum cleaning brush 146 with attached scum, can be pulled out as a whole to facilitate rinsing and cleaning of the scum adhering to the brush surface. After cleaning, it can be reinstalled in the original position and can be reused repeatedly. It is simple to disassemble and assemble, convenient to maintain, and suitable for rural use scenarios with low maintenance costs.

[0059] The linkage stirring mechanism 13 and the multi-directional stirring mechanism 12 work together to enhance the mixing effect of wastewater in the filtrate chamber 6 and improve the efficiency of subsequent filtration. The support bracket 136 is fixedly connected to the bottom of the fixed frame 1212 at both ends to provide support for the linkage stirring mechanism 13. When the upper gear rack 1215 of the multi-directional stirring mechanism 12 moves in a reciprocating linear motion, it synchronously drives the linkage frame 131 to move. The linkage frame 131 then pulls the lower gear rack 132 to move in a reciprocating motion. The lower gear rack 132 meshes with the rotating gear 133, driving the rotating gear 133 to rotate back and forth. The rotating gear 133 drives the stirring shaft 134 to rotate, ultimately causing the stirring blades 135 on the surface of the stirring shaft 134 to move in a reciprocating stirring motion in the filtrate chamber 6. This allows the wastewater that has been initially purified in the filtrate chamber 6 to fully mix and evenly distribute with the suspended impurities in it, effectively preventing the sedimentation and accumulation of impurities. This ensures that the wastewater quality is uniform when it is transported to the fabric filter 1222 again, further improving the treatment effect and stability of the circulating filtration.

[0060] After being filtered by the fabric filter 1222, the effluent permeates downwards and enters the filtrate chamber 6 for distribution. The partition 7 divides the device cavity 1 into two independent chambers: a mixing chamber 5 and a filtrate chamber 6. The effluent in the mixing chamber 5 can only pass through the fabric filter 1222 before entering the filtrate chamber 6. The return valve 8 installed on the partition 7 is a unidirectional priority flow structure, similar to a check valve, allowing only the filtrate to flow from the filtrate chamber 6 to the mixing chamber 5, achieving wastewater equalization during low-flow periods: when the daily flow is low or there is no influent, the liquid level on one side of the filtrate chamber 6 is higher than that in the mixing chamber 5, and the pressure difference pushes the return valve 8 open, allowing 100% of the filtrate to flow back to the mixing chamber 5 for continued circulation; when the liquid level on one side of the mixing chamber 5 is equal to or higher than that in the filtrate chamber 6, the return valve 8 automatically closes, stopping the backflow. After multiple cycles of filtration, the effluent that meets the treatment standards is finally discharged directly from the filtrate chamber 6, completing the entire rural domestic wastewater treatment process.

[0061] In summary, this invention continues the micro-dose cyclic dosing design, using the recirculation pump 9 to achieve low-flow, intermittent dosing of effluent to the fabric filter 1222, creating an aerobic, unsaturated treatment environment within the system and ensuring the best effect of wastewater filtration and purification; at the same time, relying on the unidirectional reflux and liquid level control of the return valve 8, it achieves full-volume cyclic treatment of wastewater during low-flow periods, improving the continuity of treatment.

[0062] The design incorporates a multi-directional stirring mechanism 12 and a linkage stirring mechanism 13, combining a single filtration action with mechanical stirring and filter dish oscillation. This not only enhances the thorough mixing and uniform distribution of the pre-purified wastewater and suspended impurities in the filtrate chamber 6 through the stirring blades 135, effectively preventing impurity sedimentation and accumulation, but also improves the filtration efficiency of the fabric filter 1222 through the rotation of the filter dish 1219. Simultaneously, it enables convenient disassembly and assembly of the filter components, balancing treatment effectiveness and equipment maintainability.

[0063] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A single-drive, multi-effect linkage type rural domestic sewage treatment device, characterized in that, The device includes a cavity (1) and an inlet (2). The inlet (2) is connected to an inlet pipe (3). The end of the inlet pipe (3) away from the inlet (2) is connected to a water passage chamber (4). The outside of the water passage chamber (4) is connected to a mixing chamber (5). The cavity (1) is also provided with a filtrate chamber (6) separated from the mixing chamber (5). A partition (7) is provided between the mixing chamber (5) and the filtrate chamber (6). A reflux valve (8) is installed on the partition (7). The reflux valve (8) is a one-way valve, and its conduction direction is from the filtrate chamber (6) to the mixing chamber (5). The mixing chamber (5) is equipped with a recirculation pump (9), and a pumping pipe (10) is connected above the recirculation pump (9). A dispensing nozzle (11) is installed at the end of the pumping pipe (10) away from the recirculation pump (9). A filter dish (1219) is provided below the dispensing nozzle (11), and a fabric filter (1222) is placed inside the filter dish (1219). A multi-directional stirring mechanism (12) is fixedly installed on the outer wall of the device cavity (1). The multi-directional stirring mechanism (12) is used to drive the filter dish (1219) to rotate. The multi-directional stirring mechanism (12) is linked with the linkage stirring mechanism (13) to drive the stirring blade (135) in the filtrate chamber (6) to reciprocate.

2. The single-drive multi-effect linkage rural domestic sewage treatment device as described in claim 1, characterized in that, The multi-directional stirring mechanism (12) includes a drive motor (121), a main bevel gear (122), a driven bevel gear (123), a shaft (124), and a shaft bracket (1241). The drive motor (121) and the shaft bracket (1241) are both fixedly installed on the outer wall of the device cavity (1). The main bevel gear (122) is connected to the output end of the drive motor (121). The driven bevel gear (123) meshes with the main bevel gear (122). The shaft (124) passes through the shaft bracket (1241) and is fixedly connected to the driven bevel gear (123).

3. The single-drive multi-effect linkage rural domestic sewage treatment device as described in claim 2, characterized in that, The multi-directional mixing mechanism (12) further includes a first sprocket (125), a chain (126), a support frame (127), and a second sprocket (1251). The first sprocket (125) is fixedly sleeved on the top surface of the shaft (124). The support frame (127) is rotatably mounted on the top of the shaft (124). The second sprocket (1251) is rotatably connected to the bottom of the support frame (127). The chain (126) is sleeved on the surfaces of the first sprocket (125) and the second sprocket (1251).

4. The single-drive multi-effect linkage rural domestic sewage treatment device as described in claim 3, characterized in that, The multi-directional mixing mechanism (12) further includes a rotating shaft (128), a rotating shaft groove (129), a push-pull plate (1210), a push-pull rod (1211), and a fixing frame (1212). The rotating shaft (128) has a shaft extending downward from its center position. This shaft passes through the support frame (127) and is connected to the second sprocket (1251). The rotating shaft groove (129) is opened on one end face of the rotating shaft (128). The bottom end of the push-pull plate (1210) has a locking block that engages in the rotating shaft groove (129). The fixing frame (1212) is fixedly installed at the top of the device cavity (1). The push-pull rod (1211) passes through the fixing frame (1212) and is fixedly connected to the push-pull plate (1210).

5. The single-drive multi-effect linkage rural domestic sewage treatment device as described in claim 4, characterized in that, The multi-directional mixing mechanism (12) further includes a fixed crossbeam (1213), a connecting frame (1214), an upper gear rack (1215), and a rotating gear (1216). The fixed crossbeam (1213) is fixedly sleeved on the surface of the push-pull rod (1211). One end of the connecting frame (1214) is fixedly connected to the fixed crossbeam (1213), and the other end is fixedly connected to the upper gear rack (1215). The rotating gear (1216) is rotatably connected below the fixed frame (1212) and meshes with the upper gear rack (1215).

6. The single-drive multi-effect linkage rural domestic sewage treatment device as described in claim 5, characterized in that, The multi-directional mixing mechanism (12) further includes a receiving frame (1217), a locking claw (1218), a filter dish (1219), and a filter hole (1221). The bottom end of the receiving frame (1217) is connected to a rotating gear (1216). The outer side of the receiving frame (1217) is integrally formed and fixedly extended with a locking claw (1218). A slot (1220) is opened on the filter dish (1219). The locking claw (1218) is locked in the slot (1220). The fabric filter sheet (1222) is placed in the filter dish (1219). The filter hole (1221) is opened on the outer surface of the filter dish (1219). After the water from the distribution nozzle (11) is sprayed onto the fabric filter sheet (1222), it flows out downward through the filter hole (1221).

7. The single-drive multi-effect linkage rural domestic sewage treatment device as described in claim 6, characterized in that, The linkage stirring mechanism (13) further includes a linkage frame (131), a lower gear rack (132), a rotating gear (133), a stirring shaft (134), a stirring blade (135), and a receiving bracket (136). The top end of the linkage frame (131) is fixedly connected to the upper gear rack (1215), and the bottom end of the linkage frame (131) is fixedly connected to the lower gear rack (132). The stirring shaft (134) is rotatably connected to the receiving bracket (136). The rotating gear (133) is fixedly sleeved on the surface of the stirring shaft (134) and meshes with the lower gear rack (132). The stirring blade (135) is fixed on the surface of the stirring shaft (134) and located in the filtrate chamber (6). The reciprocating linear motion of the upper gear rack (1215) drives the linkage frame (131) and the lower gear rack (132) to move synchronously.

8. The single-drive multi-effect linkage rural domestic sewage treatment device as described in claim 7, characterized in that, The multi-directional mixing mechanism (12) is fixedly connected to the linkage frame (131) of the linkage mixing mechanism (13) via the upper gear rack (1215) to achieve linkage; the supporting bracket (136) supports the linkage mixing mechanism (13), and the two ends of the supporting bracket (136) are fixedly connected to the bottom of the fixed frame (1212).

9. The single-drive multi-effect linkage rural domestic sewage treatment device as described in claim 5, characterized in that, The bottom end of the fixed crossbeam (1213) is fixed to the scum cleaning mechanism (14), which includes a connecting rod (141), a connecting plate (142), a pull-out slide (143), a pull-out plate (144), a cleaning plate surface (145), and a scum cleaning brush (146). The top end of the connecting rod (141) is fixedly connected to the fixed crossbeam (1213), and the bottom end of the connecting rod (141) is vertically fixedly connected to the connecting plate (142); the connecting plate (142) has a horizontally arranged pull-out groove (143) inside, and a detachable pull-out plate (144) is slidably installed in the pull-out groove (143); a cleaning plate surface (145) is fixedly extended on the outside of the pull-out plate (144), and a scum cleaning brush (146) is densely distributed on the outside of the cleaning plate surface (145).

10. A single-drive multi-effect linkage method for treating rural domestic sewage, applied to the single-drive multi-effect linkage rural domestic sewage treatment device according to any one of claims 1-9, characterized in that, The method includes the following steps: Step 1: Sewage transportation: After pretreatment in a three-compartment septic tank, rural domestic sewage enters through the inlet (2) of the device chamber (1), and flows through the inlet pipe (3) and the overflow chamber (4) into the mixing chamber (5) for temporary storage; Step 2: Micro-dosing: Wastewater in the mixing chamber (5) is transported intermittently by the recirculation pump (9) and sprayed evenly onto the surface of the fabric filter (1222) in the filter dish (1219) through the distribution nozzle (11) via the pumping pipe (10); Step 3: Start the multi-directional stirring mechanism (12). The drive motor (121) drives the push-pull rod (1211) to slide back and forth through various transmission components, which in turn drives the upper gear rack (1215) to perform reciprocating linear motion. On the one hand, it drives the rotating gear (1216) to drive the filter dish (1219) to rotate back and forth, so that the sewage and the fabric filter (1222) can fully contact each other, improve the filtration efficiency, and the filtered sewage flows into the filtrate chamber (6) through the filter holes (1221). On the other hand, the upper gear rack (1215) synchronously drives the stirring blades (135) of the linkage stirring mechanism (13). The filtrate chamber (6) is stirred repeatedly to cause suspended impurities in the water to float to the surface and form scum. At the same time, the fixed crossbeam (1213) moves back and forth synchronously with the push-pull rod (1211), which drives the scum cleaning mechanism (14) to move back and forth across the surface of the filtrate chamber (6). The scum cleaning brush (146) uses its own adsorption properties to adhere and gather the scum on the surface of the water, preventing the scum from forming a crust and falling back into the water, and ensuring smooth reoxygenation of the surface. The pull plate (144) can be pulled out and disassembled along the pull slide (143) to facilitate the rinsing and maintenance of the scum cleaning brush (146), which can be reused. Step 4: Filtrate Distribution and Recirculation: The effluent filtered by the fabric filter (1222) permeates downwards and enters the filtrate chamber (6); when the daily flow rate is low or there is no influent, the liquid level in the filtrate chamber (6) is higher than that in the mixing chamber (5), and the recirculation valve (8) opens under the action of pressure difference, and 100% of the filtrate is recirculated back to the mixing chamber (5) for continued circulation; when the liquid level in the mixing chamber (5) is equal to or higher than that in the filtrate chamber (6), the recirculation valve (8) automatically closes; Step 5: Discharge to meet standards: After multiple cycles of filtration and purification, the treated water that meets the treatment standards is directly discharged from the filtrate chamber (6) to complete the sewage treatment.

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