Sewage treatment equipment for environmental protection

Abstract

The present application relates to sewage treatment technical field, specifically to a kind of sewage treatment equipment for domestic environmental protection, including sewage pool, the side of sewage pool is connected with water inlet pipe, the side of sewage pool is connected with water outlet pipe, the upper surface of sewage pool is rotatably connected with drive screw on both sides, the outer surface of drive screw is threadedly connected with moving frame, the inner side of moving frame bottom is fixedly connected with first filter screen, the upper surface of first filter screen is rotatably connected with second filter screen, the lower surface of moving frame mutually far side is slidably connected to the upper surface of sewage pool on both sides, the side of sewage pool is fixedly connected with servo motor, the output shaft of servo motor is fixedly connected to the end of one drive screw, when second filter screen oscillates along axis in the process of moving synchronously with first filter screen, enough dynamic barrier is formed, the dynamic barrier can effectively inhibit the phenomenon of suspended sedimentation of already settled impurities caused by mechanical disturbance or water flow impact in the process of dredging.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater treatment device for domestic environmental protection. Background Technology

[0002] Wastewater treatment equipment, as a basic and common structure or core unit in wastewater treatment systems, is widely used in the collection, regulation, treatment, and temporary storage of municipal, industrial, agricultural, and domestic wastewater. Its main function is to effectively remove pollutants such as organic matter, nitrogen, phosphorus, pathogens, and suspended solids from wastewater through physical, biological, or chemical methods, so that the effluent quality meets discharge standards or reuse requirements, thereby achieving the goals of water environment protection, water resource recycling, and promoting green, low-carbon, and ecological civilization construction.

[0003] When cleaning sludge or impurities deposited in sewage tanks, the sediment layer has a layered structure. Under mechanical disturbance or water flow impact, the bottom sludge is easily pushed and slipped between layers or overturned, causing the settled particles to be resuspended in the water. This phenomenon not only deteriorates the effluent quality, but may also cause pollutants to spread with the water flow to uncleaned areas, or even cause reverse flow and repeated deposition, significantly increasing the difficulty of sludge cleaning and the operation cycle, reducing the overall cleaning efficiency, and affecting the stable operation of the sewage treatment system.

[0004] Therefore, this invention proposes a wastewater treatment device for domestic environmental protection to make up for and improve the shortcomings of the prior art. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a domestic environmental wastewater treatment device that can effectively solve the above-mentioned technical problems.

[0006] The technical implementation of this invention is as follows: a domestic wastewater treatment device includes a wastewater tank, an inlet pipe connected to one side of the wastewater tank, an outlet pipe connected to the other side of the wastewater tank, drive screws rotatably connected to both sides of the upper surface of the wastewater tank, a movable frame threaded between the outer surfaces of the drive screws, a first filter screen fixedly connected to the inner side of the bottom of the movable frame, a second filter screen rotatably connected to the upper surface of the first filter screen, the lower surfaces of the movable frame on opposite sides slidably connected to both sides of the upper surface of the wastewater tank, a servo motor fixedly connected to one side of the wastewater tank, the output shaft of the servo motor fixedly connected to one end of one of the drive screws, one end of a synchronous belt drivingly connected to one end of the other drive screw, and a synchronous belt drivingly connected to the outer surface of the output shaft of the servo motor. When the second filter screen swings along the axis as it moves synchronously with the first filter screen, a dynamic barrier is formed. This dynamic barrier can effectively suppress the resuspension of settled impurities caused by mechanical disturbance or water flow impact during the sludge removal process.

[0007] More preferably, a rotating shaft is rotatably connected to the middle of the upper surface of the first filter screen, and a chain is fixedly wound around the outer surface of the rotating shaft. A guide wheel is fixedly connected to the lower surface of the top of the first filter screen. The bottom end of the chain is fixedly connected to one side of the second filter screen. The outer surface of the chain is slidably engaged with the inner side of the guide wheel. Multiple counterweights are fixedly connected in a straight line to one side of the second filter screen. When the chain is wound and released by the rotating shaft, it can assist the second filter screen in swinging and resetting.

[0008] More preferably, a rotating gear is fixedly connected to one end of the rotating shaft, and a fixed rack is fixedly connected to one side of the upper surface of the sewage tank. The lower surface of the fixed rack meshes with the outer surface of the rotating gear. When the outer surface of the rotating gear meshes with the lower surface of the fixed rack, the rotating shaft can be driven to rotate.

[0009] More preferably, a conveying frame is fixedly connected to one side of the upper surface of the sewage tank, a water guide pipe is connected to one end of the conveying frame, a fixing ring is connected to one end of the water guide pipe, a drive motor is fixedly connected to the upper surface of the conveying frame, a threaded paddle is fixedly connected to the output shaft of the drive motor, the outer surface of the threaded paddle is rotatably connected to the inner side of the fixing ring, and a ramp is fixedly connected to one side of the interior of the sewage tank. When the threaded paddle rotates, it can continuously and stably suck up the high-concentration sludge and sediment impurities at the bottom of the tank, and complete the efficient transfer after centralized collection.

[0010] More preferably, a fixing plate is fixedly connected to the inner wall of one side of the sewage tank. One side of the fixing plate is inclined, and the upper surface of the chain rope is also inclined. The inclined surface of the fixing plate and the inclined surface of the chain rope are squeezed together. A filter ring is rotatably connected to the inner side of the water guide pipe. The outer surface of the threaded paddle is fixedly connected to the inner wall of the filter ring. When the inclined surface of the fixing plate is squeezed against the inclined surface of the counterweight, the stability of the second filter screen after swinging can be improved, thereby preventing the second filter screen from accidentally unfolding.

[0011] More preferably, a sludge storage frame is fixedly connected to one side of the sewage tank, the bottom end of one side of the conveying frame is connected to the upper surface of the sludge storage frame, a filter plate is fixedly connected to the inner side of the sludge storage frame, an extrusion block is slidably connected to one side of the sludge storage frame, a reciprocating screw is rotatably connected to one side of the upper surface of the sludge storage frame, the upper surface of the extrusion block is threaded to the outer surface of the reciprocating screw, a transmission wheel is fixedly connected to one end of the reciprocating screw, a bevel gear is fixedly connected to the outer surface of the output shaft of the drive motor, one end of the bevel gear is rotatably connected to the upper surface of the conveying frame, and a transmission belt is drivingly connected between one end of the bevel gear and the outer surface of the transmission wheel. When the extrusion block moves to the right to extrude the extracted impurities, the residual water in the impurities is further squeezed out, significantly reducing the water content and total volume of the sludge, thus achieving volume reduction treatment.

[0012] More preferably, a sludge storage box is fixedly connected to one side of the sewage tank, and a squeezing frame is slidably connected to the other side of the sludge storage frame. Springs are fixedly sleeved on the outer surfaces of both ends of the other side of the sludge storage frame, and one end of each spring is fixedly connected to one side of the squeezing frame. The squeezing frame blocks impurities, thereby facilitating the squeezing of impurities into blocks and then pushing them out.

[0013] More preferably, a water storage frame is connected to the lower surface of the sludge storage frame, the front end of the water storage frame is connected to the rear side of the sewage tank, and the rear end of the water storage frame is connected to the outer surface of the bottom of the water guide pipe. When the filtrate obtained by pressing is recovered through the filter plate, the internal recycling of water resources is realized, avoiding additional losses.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The present invention forms a dynamic barrier by swinging along the axis of the second filter screen as it moves synchronously with the first filter screen. This dynamic barrier can effectively suppress the resuspension of settled impurities caused by mechanical disturbance or water flow impact during the dredging process, so that the sediment is continuously and stably retained in the bottom area of ​​the pool, thereby reducing the repeated deposition and diffusion of impurities, significantly shortening the dredging cycle, and improving the overall dredging efficiency. At the same time, this structure helps to maintain the stability of water stratification, reduce the interference of the flow field in the upper clarification zone, ensure the continuity of the sewage treatment process and the stability of the effluent water quality, and avoid secondary pollution.

[0016] 2. This invention, through the rotation of the spiral paddle, can continuously and stably suck up high-concentration sludge and sedimented impurities from the bottom of the tank, achieving efficient transfer after centralized collection. This overcomes the problems of low operating efficiency and incomplete cleaning caused by traditional manual sludge removal or intermittent sludge discharge. The suction mechanism has excellent conveying performance for complex sludge with high solids content, high viscosity, and particulate matter, and has strong anti-clogging ability, making it suitable for wastewater treatment scenarios with variable composition and complex operating conditions. Furthermore, when the water inside the impurities is filtered out by the filter ring, its water content is significantly reduced, its volume is reduced, and its fluidity is weakened, facilitating subsequent transportation and disposal. The filtrate can be returned to the bottom of the wastewater tank from the water guide pipe, and its return direction is consistent with the sludge settling direction, avoiding the formation of local turbulence in the tank, thereby effectively maintaining the static environment of the upper water body and preventing adverse effects on the solid-liquid separation process.

[0017] 3. When the impurities are squeezed by the moving extrusion block, the residual water in the impurities can be squeezed out, which can significantly reduce the water content and total volume of the sludge and achieve volume reduction treatment. This process allows the same volume of storage device to hold more solid waste, significantly reduces the number of transfers, and improves the space utilization efficiency of storage and transportation. Moreover, the sludge formed after extrusion is semi-dry or cake-shaped, with low fluidity and non-dripping characteristics, which effectively avoids the problem of leachate leakage and spillage that may occur during the transfer of wet sludge, and improves operational safety and environmental friendliness. In addition, the filtrate obtained by pressing is returned to the bottom of the sewage tank through the water storage frame to realize the internal recycling of water resources, avoid additional losses, and enhance the energy efficiency and sustainability of the system operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a cross-sectional view of the scraping component of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the chain rope pulling the second filter screen according to the present invention.

[0021] Figure 4 This is a cross-sectional view of the structure of the impurity removal component of the present invention.

[0022] Figure 5 This is a schematic diagram of the pressing component of the present invention.

[0023] Figure 6 This is a cross-sectional view of the structure of the extrusion block of the present invention extruding impurities.

[0024] Figure 7 This is a schematic diagram of the impurity conveying mechanism of the threaded slurry of the present invention.

[0025] The components in the attached diagram are labeled as follows: 1-Sewage tank, 101-Inlet pipe, 102-Outlet pipe, 11-Servo motor, 12-Drive screw, 13-Moving frame, 14-Synchronous belt, 15-First filter screen, 16-Second filter screen, 17-Fixed rack, 18-Rotating gear, 19-Counterweight, 110-Chain rope, 111-Rotating shaft, 112-Guide wheel, 2-Fixed plate, 21-Fixed ring, 22-Water guide pipe, 23-Conveying frame, 24-Threaded paddle, 25-Incline, 26-Drive motor, 27-Filter ring, 3-Sludge storage box, 31-Sludge storage frame, 32-Extrusion block, 33-Transmission wheel, 34-Transmission belt, 35-Bevel gear, 36-Reciprocating screw, 37-Filter plate, 38-Water storage frame, 39-Extrusion frame, 310-Spring. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Next, we will combine the appendix Figures 1-7 A specific embodiment of the present invention will be described in detail below.

[0028] Reference Appendix Figure 1 A domestic wastewater treatment device includes a wastewater tank 1. An inlet pipe 101 is connected to the front of the wastewater tank 1 for discharging wastewater into the wastewater tank 1. An outlet pipe 102 is connected to the rear of the wastewater tank 1 for discharging the water that has settled inside the wastewater tank 1.

[0029] As described in the background art, when dredging the sludge or impurities deposited in the sewage tank 1, due to the layered structure of the sediment layer, the bottom sludge is easily pushed and slipped between layers or overturned under the action of mechanical disturbance or water flow impact. This causes the settled particles to be resuspended in the water. This phenomenon not only deteriorates the effluent quality, but may also cause pollutants to spread with the water flow to the uncleaned area, or even cause reverse flow and repeated deposition, significantly increasing the difficulty of dredging and the operation cycle, reducing the overall cleaning efficiency, and affecting the stable operation of the sewage treatment system.

[0030] Reference Appendix Figures 1-3To address the issue of impurities easily tumbling upwards during cleaning, this embodiment employs the following technical solution: Drive screws 12 are rotatably connected to both sides of the upper surface of the sewage tank 1. A movable frame 13 is threaded between the outer surfaces of the drive screws 12. The drive screws 12 drive the movable frame 13 to move left and right. A first filter screen 15 is fixedly connected to the inner side of the bottom of the movable frame 13. The first filter screen 15 is used to collect impurities at the bottom of the sewage tank 1. The lower surfaces of the movable frame 13 on opposite sides are slidably connected to both sides of the upper surface of the sewage tank 1. A servo motor 11 is fixedly connected to the top right side of the sewage tank 1. The output shaft of the servo motor 11 is fixedly connected to... At the right end of the front drive screw 12, a servo motor 11 is used to drive the front drive screw 12 to rotate. The outer surface of the output shaft of the servo motor 11 is connected to a synchronous belt 14. The rear end of the synchronous belt 14 is connected to the right end of the rear drive screw 12. The synchronous belt 14 is used to make the two drive screws 12 rotate synchronously. The upper surface of the first filter screen 15 is rotatably connected to a second filter screen 16. The first filter screen 15 is used to drive the second filter screen 16 to move synchronously. The second filter screen 16 is used to block impurities. On the left side of the second filter screen 16, multiple counterweights 19 are fixedly connected in a straight line. The counterweights 19 are used to assist the second filter screen 16 in swinging.

[0031] A rotating shaft 111 is rotatably connected to the middle of the upper surface of the first filter screen 15. A chain rope 110 is fixedly wound around the outer surface of the rotating shaft 111. A guide wheel 112 is fixedly connected to the lower surface of the top of the movable frame 13. The outer surface of the bottom end of the rotating shaft 111 is slidably connected to the inner side of the guide wheel 112. The guide wheel 112 is used to guide the rotating shaft 111. The bottom end of the rotating shaft 111 is fixedly connected to the right side of the second filter screen 16. The rotating shaft 111 is used to pull the second filter screen 16. A fixed rack 17 is fixedly connected to the right side of the upper surface of the sewage tank 1. A rotating gear 18 is fixedly connected to the front end of the rotating shaft 111. The rotating gear 18 is used to drive the rotating shaft 111 to rotate. The lower surface of the fixed rack 17 and the outer surface of the rotating gear 18 are meshed together.

[0032] When it is necessary to clean the impurities settled at the bottom of the sewage tank 1, the servo motor 11 starts, and its output shaft drives the front drive screw 12 to rotate. At the same time, through the transmission action of the synchronous belt 14, the rear drive screw 12 achieves synchronous rotation. The synchronous rotation of the two drive screws 12 drives the first filter screen 15 to move horizontally to the left at the bottom of the sewage tank 1 through the moving frame 13, thereby gradually gathering the deposited impurities.

[0033] During the movement, the moving frame 13 drives the rotating gear 18 to move synchronously to the left via the rotating shaft 111. As the rotating gear 18 moves, its teeth mesh with the lower surface of the fixed rack 17 fixed to the side wall of the sewage tank, causing the rotating gear 18 to rotate clockwise around the rotating shaft 111. The clockwise rotation of the rotating shaft 111 releases the winding section at the top of the chain rope 110, thereby releasing the constraint of the chain rope 110 on the second filter screen 16.

[0034] At this time, the second filter screen 16 swings clockwise around its hinge axis under the gravity of the counterweight 19, forming a downward-sloping dynamic interception barrier. This structure effectively inhibits the floating of settled impurities caused by water flow disturbance during the process of the first filter screen 15 pushing impurities to the left, thereby keeping the impurities at the bottom and pushing them to the sludge discharge area, reducing repeated sedimentation and cleaning processes, improving the overall cleaning efficiency, and effectively inhibiting the upward flow of impurities, which helps to maintain the relative stability of the water body, reduce the interference of turbulence on the sewage treatment process, and reduce the impact of secondary pollution.

[0035] Once the impurities have accumulated, the servo motor 11 reverses, driving the two drive screws 12 to rotate in the opposite direction. This causes the first filter screen 15 and the second filter screen 16 to reset to the right via the moving frame 13. During this process, the moving frame 13 drives the rotating gear 18 to move to the right. The rotating gear 18 meshes with the fixed rack 17 again and is limited by it, thereby driving the rotating shaft 111 to rotate counterclockwise. The rotating shaft 111 rotates counterclockwise to wind up the chain rope 110. The chain rope 110 applies a pulling force to the right side of the second filter screen 16, causing it to overcome the gravity of the counterweight 19 and rotate clockwise around the hinge axis back to the initial horizontal state, thus completing the reset.

[0036] When the first filter screen 15 has finished collecting impurities, operators still need to collect the impurities separately, which is not only slow but also inefficient.

[0037] Reference Appendix Figure 4 and Figure 7To address the issue of collecting impurities beyond what is required, this embodiment employs the following technical solution: A conveying frame 23 is fixedly connected to the rear side of the upper surface of the sewage tank 1. A water guide pipe 22 is connected through the bottom of the conveying frame 23, which is used to drain the water inside the impurities. A fixing ring 21 is connected through the bottom of the front side of the water guide pipe 22. A drive motor 26 is fixedly connected to the upper surface of the conveying frame 23. A threaded paddle 24 is fixedly connected to the output shaft of the drive motor 26. The bottom end of the threaded paddle 24 is rotatably connected to the upper surface inside the sewage tank 1. The drive motor 26 is used to drive the threaded paddle 24 to rotate, and the threaded paddle 24 is used to convey impurities. A ramp 25 is fixedly connected to the inside of the left side of the sewage tank 1, which is used to guide the accumulated impurities. A filter ring 27 is rotatably connected to the inner side of the water guide pipe 22. The outer surface of the threaded paddle 24 is fixedly connected to the inner wall of the filter ring 27, and the threaded paddle 24 is used to drive the filter ring 27 to rotate, and the filter ring 27 is used to squeeze out the water inside the impurities.

[0038] When the first filter screen 15 pushes the bottom impurities to the left side of the sewage tank 1, the impurities are guided to the front left position along the surface of the slope 25 at the bottom of the tank. At this time, the drive motor 26 starts, and its output shaft drives the screw propeller 24 to rotate. The screw propulsion principle is used to continuously and stably transport the accumulated high-concentration sludge and sediment impurities. Under the action of the screw propeller 24, the impurities pass through the inner cavity of the fixed ring 21 and the water guide pipe 22 in sequence, and are discharged from the rear side of the conveying frame 23, realizing the efficient transfer of sediments.

[0039] This suction and conveying mechanism effectively overcomes the problems of low operating efficiency and incomplete cleaning and discharge that exist in traditional manual sludge removal or intermittent sludge discharge. Due to the strong conveying capacity of the threaded paddle 24, it can adapt to complex sludge conditions with high solids content, high viscosity and particulate matter, and has good anti-clogging performance, making it suitable for sewage treatment scenarios with variable composition and complex operating environments.

[0040] During the conveying process, the threaded paddle 24 synchronously drives the filter ring 27 to rotate. The filter ring 27 is set inside the fixed plate 2. When it rotates with the shaft, it centrifugally filters the residual water in the sludge, significantly reducing the water content of the sludge, reducing its volume and weakening its fluidity, thereby improving the convenience of subsequent transportation and disposal. The filtered liquid flows back to the bottom of the sewage tank 1 through the water guide pipe 22. Its return direction is consistent with the sludge settling direction, avoiding the formation of local turbulence in the tank, effectively maintaining the static state of the upper water body, and ensuring the stable progress of the solid-liquid separation process.

[0041] A fixing plate 2 is fixedly connected to the inner wall on the left side of the sewage tank 1, and the right side is inclined. The upper surface of the counterweight 19 is also inclined. The inclined surface of the fixing plate 2 is pressed and engaged with the inclined surface at the top of the counterweight 19. When the first filter screen 15 moves to the left and drives the second filter screen 16 to move synchronously, the counterweight 19 hangs down accordingly. Under its own gravity, it drives the second filter screen 16 to swing counterclockwise around the hinge axis, thereby forming a downward-inclined dynamic interception barrier. During this process, the counterweight 19 moves to the left with the overall structure, and its top inclined surface gradually contacts the inclined surface on the right side of the fixing plate 2 and generates a pressing effect. This contact interface enables the fixing plate 2 to effectively limit the counterweight 19 mechanically, preventing it from unnecessary rebound or swinging under the disturbance of water flow or the suction of the screw propeller 24.

[0042] During the continuous conveying of high-concentration sludge by the threaded paddle 24, the limiting structure can effectively enhance the working stability of the second filter screen 16, avoid structural instability caused by vibration or fluid impact, keep it in the best sludge-blocking posture, improve the overall rigidity and operational reliability of the system during the cleaning operation, and further ensure that impurities are pushed to the sludge discharge area efficiently and orderly.

[0043] When the conveyor frame 23 discharges impurities from inside the sewage tank 1, the impurities are highly fluid and prone to dripping. During the transfer process, problems such as leachate leakage and spillage can easily occur, polluting the environment along the transport route.

[0044] Reference Appendix Figures 5-7 To address the issue of highly fluid and easily leaking impurities, this embodiment employs the following technical solution: A sludge storage frame 31 is fixedly connected to the rear side of the sewage tank 1. The lower surface of the rear side of the conveying frame 23 is connected to the upper surface of the sludge storage frame 31. The sludge storage frame 31 is used to receive impurities. A filter plate 37 is fixedly connected to the inner side of the sludge storage frame 31. The filter plate 37 is used to filter out the moisture inside the impurities. A pressing block 32 is slidably connected to the left side of the sludge storage frame 31. The pressing block 32 is used to press the impurities. A reciprocating screw 36 is rotatably connected to the left side of the upper surface of the sludge storage frame 31. The upper surface of the pressing block 32 is threadedly connected to the outer surface of the reciprocating screw 36. The reciprocating screw 36 is used to drive the pressing block 32 to move left and right.

[0045] A transmission wheel 33 is fixedly connected to the left end of the reciprocating screw 36. The transmission wheel 33 is used to drive the reciprocating screw 36 to rotate. A bevel gear 35 is fixedly connected to the outer surface of the output shaft of the drive motor 26. The left end of the bevel gear 35 is rotatably connected to the upper surface of the conveying frame 23. A transmission belt 34 is connected between the left end of the bevel gear 35 and the outer surface of the transmission wheel 33. The bevel gear 35 is used to drive the transmission wheel 33 to rotate through the transmission belt 34. A sludge storage box 3 is fixedly connected to the rear side of the sewage tank 1. The sludge storage box 3 is used to collect impurities.

[0046] A squeezing frame 39 is fixedly connected to the right side of the sludge storage frame 31. The squeezing frame 39 is used to block impurities. Springs 310 are fixedly sleeved on the outer surfaces of both ends of the right side of the sludge storage frame 31. The left end bracket of the spring 310 is fixedly connected to the right side of the squeezing frame 39. The spring 310 is used to drive the squeezing frame 39 to reset and move. A water storage frame 38 is connected through the lower surface of the sludge storage frame 31. The front end of the water storage frame 38 is connected through the rear side of the sewage tank 1. The rear end of the water storage frame 38 is connected through the outer surface of the bottom of the water guide pipe 22. The water storage frame 38 is used to guide the filtrate.

[0047] When the drive motor 26 starts, its output shaft drives the threaded paddle 24 to rotate, continuously conveying the sludge and impurities accumulated in the sewage tank 1 to the sludge storage frame 31 through the conveying frame 23. At the same time, the output shaft of the drive motor 26 synchronously drives the bevel gear 35 to rotate. The bevel gear 35 drives the transmission wheel 33 to rotate through the transmission belt 34, thereby driving the reciprocating screw 36 to rotate.

[0048] The rotation of the reciprocating screw 36 drives the extrusion block 32 to move to the right in the horizontal direction. During the movement, the extrusion block 32 gradually compresses the sludge in the sludge storage frame 31. As the extrusion effect intensifies, the water in the sludge is extracted and seeps into the water storage frame 38 below through the filter plate 37. It then flows back to the bottom of the sewage tank 1 through the water guide pipe 22, improving the sludge-liquid separation efficiency and facilitating subsequent sludge recovery. Furthermore, when the water extracted from the sludge flows out from the bottom of the water guide pipe 22, it can also wash the sludge on the upper surface of the slope 25, allowing the sludge accumulated on the upper surface of the slope 25 to move forward, thus facilitating the continuous transport of sludge by the screw slurry 24.

[0049] As the squeezing block 32 continues to move to the right, the sludge is further compressed by the thrust and pressure is applied to the squeezing frame 39 on the right side, causing it to overcome the elastic force of the spring 310 and move to the right. The spring then enters a compressed state. When the squeezing block 32 completely pushes the sludge out of the sludge storage frame 31, the sludge falls into the sludge storage box 3 below under the action of gravity to complete the collection.

[0050] At this point, the sludge has undergone significant volume reduction through mechanical extrusion, resulting in a substantial decrease in water content and volume. It has a semi-dry or cake-like structure with low fluidity and is not prone to dripping, effectively avoiding leachate leakage and spillage problems that may occur during the transfer of wet sludge. This improves operational safety and environmental friendliness. At the same time, the reduced sludge volume can increase the utilization rate of storage volume, reduce the frequency of cleaning, and optimize operational efficiency.

[0051] Subsequently, as the reciprocating screw 36 continues to rotate, the extrusion block 32 begins to move to the left and return to its initial position within the mud storage frame 31, ready for the next extrusion operation. At the same time, the spring 310, which is in a compressed state, releases its elastic potential energy, pushing the extrusion frame 39 to automatically reset to its initial position and return to the ready-to-press state.

[0052] This system achieves continuous sludge conveying, efficient dewatering, stable discharge, and automatic reset through mechanical linkage. It integrates solid-liquid separation, volume reduction, and resource reuse functions, significantly improving the automation level and operational reliability of the sludge discharge stage of the wastewater treatment system.

[0053] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A domestic wastewater treatment device, comprising a wastewater tank (1), wherein an inlet pipe (101) is connected through one side of the wastewater tank (1), and an outlet pipe (102) is connected through the other side of the wastewater tank (1), characterized in that, Both sides of the upper surface of the sewage tank (1) are rotatably connected to drive screws (12). The outer surfaces of the drive screws (12) are threaded together with a movable frame (13). The inner side of the bottom of the movable frame (13) is fixedly connected to a first filter screen (15). The upper surface of the first filter screen (15) is rotatably connected to a second filter screen (16). The lower surfaces of the movable frame (13) on opposite sides are slidably connected to both sides of the upper surface of the sewage tank (1). A servo motor (11) is fixedly connected to one side of the sewage tank (1). The output shaft of the servo motor (11) is fixedly connected to one end of one of the drive screws (12). The outer surface of the output shaft of the servo motor (11) is driven by a synchronous belt (14). One end of the synchronous belt (14) is driven by one end of the other drive screw (12).

2. The wastewater treatment equipment for domestic environmental protection according to claim 1, characterized in that, A rotating shaft (111) is rotatably connected to the middle of the upper surface of the first filter screen (15). A chain (110) is fixedly wound around the outer surface of the rotating shaft (111). A guide wheel (112) is fixedly connected to the lower surface of the top of the first filter screen (15). The bottom end of the chain (110) is fixedly connected to one side of the second filter screen (16). The outer surface of the chain (110) slides with the inner side of the guide wheel (112). A plurality of counterweights (19) are fixedly connected in a straight line on one side of the second filter screen (16).

3. The wastewater treatment equipment for domestic environmental protection according to claim 2, characterized in that, One end of the rotating shaft (111) is fixedly connected to a rotating gear (18), and a fixed rack (17) is fixedly connected to one side of the upper surface of the sewage tank (1). The lower surface of the fixed rack (17) meshes with the outer surface of the rotating gear (18).

4. The wastewater treatment equipment for domestic environmental protection according to claim 1, characterized in that, A conveying frame (23) is fixedly connected to one side of the upper surface of the sewage tank (1). A water guide pipe (22) is connected through one end of the conveying frame (23). A fixing ring (21) is connected through one end of the water guide pipe (22). A drive motor (26) is fixedly connected to the upper surface of the conveying frame (23). A threaded paddle (24) is fixedly connected to the output shaft of the drive motor (26). The outer surface of the threaded paddle (24) is rotatably connected to the inner side of the fixing ring (21). A ramp (25) is fixedly connected to one side of the interior of the sewage tank (1).

5. A domestic wastewater treatment device for environmental protection according to claim 4, characterized in that, A fixing plate (2) is fixedly connected to the inner wall of one side of the sewage tank (1). One side of the fixing plate (2) is inclined. The upper surface of the chain rope (110) is inclined. The inclined surface of the fixing plate (2) and the inclined surface of the chain rope (110) are squeezed together. A filter ring (27) is rotatably connected to the inner side of the water guide pipe (22). The outer surface of the threaded paddle (24) is fixedly connected to the inner wall of the filter ring (27).

6. A domestic wastewater treatment device for environmental protection according to claim 1, characterized in that, A sludge storage frame (31) is fixedly connected to one side of the sewage tank (1). The bottom end of one side of the conveying frame (23) is connected to the upper surface of the sludge storage frame (31). A filter plate (37) is fixedly connected to the inner side of the sludge storage frame (31). An extrusion block (32) is slidably connected to one side of the sludge storage frame (31). A reciprocating screw (36) is rotatably connected to one side of the upper surface of the sludge storage frame (31). The upper surface of the extrusion block (32) is threaded to the outer surface of the reciprocating screw (36). A transmission wheel (33) is fixedly connected to one end of the reciprocating screw (36). A bevel gear (35) is fixedly connected to the outer surface of the output shaft of the drive motor (26). One end of the bevel gear (35) is rotatably connected to the upper surface of the conveying frame (23). A transmission belt (34) is connected between one end of the bevel gear (35) and the outer surface of the transmission wheel (33).

7. A domestic wastewater treatment device for environmental protection according to claim 6, characterized in that, A sludge storage box (3) is fixedly connected to one side of the sewage tank (1), and an extrusion frame (39) is slidably connected to the other side of the sludge storage frame (31). Springs (310) are fixedly sleeved on the outer surfaces of both ends of the other side of the sludge storage frame (31), and one end of the springs (310) is fixedly connected to one side of the extrusion frame (39).

8. A domestic wastewater treatment device for environmental protection according to claim 7, characterized in that, The lower surface of the sludge storage frame (31) is connected to a water storage frame (38). The front end of the water storage frame (38) is connected to the rear side of the sewage tank (1), and the rear end of the water storage frame (38) is connected to the outer surface of the bottom of the water guide pipe (22).

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