Multi-stage sewage treatment device for water conservancy construction

Abstract

The present application relates to the field of sewage treatment, and particularly to a multi-stage sewage treatment device for water conservancy construction, which can realize multi-stage filtration of sewage and clean the surface of the multi-stage filter screen to prevent impurities from entering the device due to simultaneous cleaning and air intake, and comprises a filter box, a first-stage sewage treatment component, a second-stage sewage treatment component and a third-stage sewage treatment component. The present application first performs preliminary treatment through the first-stage sewage treatment component, then performs accurate treatment through the second-stage sewage treatment component, and finally performs static precipitation through the third-stage sewage treatment component to realize complete treatment of the sewage and realize grading and fine treatment, which facilitates the discharge of the device. Through multi-stage treatment, the phenomenon of excessive filtration load and easy clogging of the filter screen that cannot be completely cleaned due to centralized treatment can be avoided.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-stage wastewater treatment device for water conservancy construction. Background Technology

[0002] Water conservancy construction is the core link in water conservancy project construction, covering key projects such as river regulation, dam construction, canal excavation, and reservoir construction. Its operation scenarios often face complex and highly polluting conditions: during the construction process, a large amount of wastewater is continuously generated, such as foundation pit dewatering, concrete mixing plant washing wastewater, machinery vehicle washing sewage, and muddy wastewater generated from earthwork excavation. This type of sewage has a complex composition, containing not only large suspended solids such as silt, gravel, and concrete residue, but also pollutants such as oil, chemical additives, and heavy metal ions. If it is discharged directly without effective treatment, it will not only silt up river channels, block pipe networks, and disrupt the ecological balance of surrounding water areas, but may also seep into and pollute the soil and groundwater, causing irreversible damage to the regional ecological environment. Furthermore, the excessive discharge of pollutants will violate environmental protection regulations and seriously restrict the compliant progress of water conservancy projects.

[0003] Traditional equipment mostly adopts a single-stage or two-stage filtration mode, with a single filtration level and a simple treatment process. When faced with construction wastewater with high silt content and a variety of pollutants, it cannot achieve graded and refined treatment. Large particles and fine pollutants are mixed in the same filtration unit, which not only leads to concentrated filtration load and easy clogging of the filter screen, but also makes it difficult to completely remove soluble pollutants such as oil and chemical additives. The treated water quality often fails to meet the discharge standards and is difficult to meet environmental protection requirements.

[0004] More significantly, traditional wastewater treatment devices suffer from severe technical bottlenecks in the filter cleaning process. Most devices use fixed-installation filters, lacking automatic cleaning mechanisms. Once the filters become clogged, they can only be manually disassembled and cleaned after the system is shut down. This is not only time-consuming and labor-intensive, severely impacting construction efficiency, but also disrupts the wastewater treatment process due to frequent shutdowns, leading to wastewater accumulation and increasing environmental risks at the construction site. Even in devices that attempt to introduce automatic cleaning functions, the design of cleaning a single filter simultaneously has a fatal flaw: during cleaning, the filter cannot be effectively isolated from the inlet channel. The water flow disturbance or mechanical scraping generated during cleaning allows unfiltered wastewater to directly penetrate the cleaning area, carrying impurities into the device. This not only contaminates the treated water but also causes wear and blockage of core components such as internal pipes and pumps, accelerating equipment wear, shortening service life, and failing to guarantee the continuity and stability of wastewater treatment.

[0005] Therefore, the present invention provides a multi-stage sewage treatment device for water conservancy construction to solve the above problems. Summary of the Invention

[0006] In view of the above situation and to overcome the defects of the prior art, the present invention provides a multi-stage sewage treatment device for water conservancy construction, which solves the problem of being able to achieve multi-stage filtration of sewage and clean the surface of the multi-stage filter screen to prevent impurities from entering the device due to air intake while cleaning.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A multi-stage wastewater treatment device for water conservancy construction includes a filter box, a primary wastewater treatment component, a secondary wastewater treatment component, and a tertiary wastewater treatment component. The primary and secondary wastewater treatment components are located inside the filter box, and the tertiary wastewater treatment component is located at the lower part of the filter box and is in communication with the filter box. The top of the filter box is sealed and fluid-conductingly connected to an inlet tank, and a branch pipe is provided on the side wall of the top of the inlet tank. The primary wastewater treatment component includes a sealing box, a cleaning box, and a first filter plate. The first filter plate is located in the upper part inside the filter box. The sealing box is sealed and connected to the side wall of the top of the filter box. The cleaning box slides inside the filter box and the sealing box. There are two cleaning boxes, and the two sealing boxes slide alternately into the filter box. The secondary wastewater treatment component includes a screw extrusion mechanism, a filter plate extrusion mechanism, and a cleaning mechanism. The device comprises a primary wastewater treatment unit and a secondary wastewater treatment unit. The extrusion screw is rotatably connected inside the filter box, and the extrusion filter plate is threaded onto the outer wall of the extrusion screw. The cleaning plate is slidably connected to the outer wall of the extrusion filter plate. The second filter plate is located on the inner bottom wall of the filter box. The tertiary wastewater treatment component includes a settling tank, which is connected to the bottom of the filter box via the second filter plate. This triple wastewater treatment system allows for thorough treatment of wastewater. First, primary wastewater treatment performs preliminary treatment; then, secondary wastewater treatment performs precise treatment; and finally, tertiary wastewater treatment allows for settling and sedimentation. This multi-stage treatment avoids the excessive filtration load and clogging of the filter screen caused by centralized treatment.

[0008] Preferably, a cleaning screw is rotatably connected between the filter box and the sealed box, one end of the cleaning screw is fixedly connected to the output end of a forward and reverse motor, and the forward and reverse motor is fixedly installed on the outside of the sealed box; A threaded block is fixedly installed on the outer wall of the cleaning box, and the threaded block is threadedly connected to the outer wall of the cleaning screw. A connecting pipe is installed at the bottom of the sealed box, which is connected to the branch water pipe. A one-way valve is installed on the branch water pipe, and the flow direction of the one-way valve is from the outside to the inside. In use, wastewater is guided into the filter box through the inlet tank. Then, by starting the forward and reverse motors, the cleaning screw rotates, and the threaded blocks on its outer wall simultaneously move the cleaning box inside one end of the sealed box, allowing it to enter the filter box. The cleaning box seals one end of the outer wall of the first filter plate, leaving one end of the first filter plate open. The other end forms a fluid channel with the cleaning box and the sealed box, allowing wastewater to enter through one end of the first filter plate, while a small portion of the wastewater flows back, thus cleaning the first filter plate. One end of the plate is flushed to achieve a backwashing function. The flushed wastewater will re-enter the filter box through the connecting pipe for further filtration. This device, with its cleaning and sealing boxes, avoids frequent replacement of the first filter plate and prevents filtration degradation due to downtime. The cleaning box cleans the outer wall of the first filter plate. After cleaning, to prevent impurities from entering the device and increasing the subsequent filtration load, the cleaning and sealing boxes form a fluid channel for backwashing. The device has two cleaning boxes, which can be used alternately, allowing for simultaneous sealing and cleaning while filtering, enabling cleaning without shutting down the machine.

[0009] Preferably, a retaining plate is fixedly installed on the top of the inside of the filter box, and the first filter plate is snapped into the inside of the retaining plate.

[0010] Preferably, the cleaning box is rotatably connected to a rotating shaft, a spiral spring is fixedly installed on the outer wall of one end of the rotating shaft, and the other end of the spiral spring is fixedly connected to the inner wall of the cleaning box. A drive gear is connected to the outer wall of the middle part of the rotating shaft. One side of the drive gear is meshed with the rotating gear plate. One end of the rotating gear plate matches the clamping plate. The other end of the rotating gear plate is fixedly connected to the inner wall of the cleaning box by a compression spring. A bidirectional lead screw is rotatably connected to the inner wall of the cleaning box. A one-way gear is unidirectionally driven to the outer wall of the middle part of the bidirectional lead screw. The one-way gear meshes with the drive gear. A scraper is threaded to the outer wall of the bidirectional lead screw, and the outer wall of the scraper matches the outer wall of the first filter plate. After the cleaning box slides into the filter box, the bidirectional lead screw of this device can rotate, thereby causing the scraper to scrape the outer wall of the first filter plate. At the same time, the backflow carries away impurities, preventing impurities from remaining on the outer wall of the first filter plate. This thoroughly cleans one end of the first filter plate, preventing impurities from separating due to scraping and preventing separated impurities from entering the device.

[0011] Preferably, the bidirectional lead screw has an inner groove, and an inclined block is slidably connected inside the inner groove. One end of the inclined block is triangular in shape, and a one-way spring is fixedly installed at one end of the inclined block inside the inner groove. The other end of the one-way spring is fixedly connected to the inner wall of the inner groove. The inner wall of the one-way gear has an inclined groove, which matches the inclined block. When the cleaning box slides into the filter box, one end of the rotating gear plate will abut against one end of the clamping plate, causing the rotating gear plate to move inward. This, in turn, drives the rotating shaft to rotate through the drive gear. The worm spring is in a compressed state. At this time, the inclined surface of the inclined block on the inner wall of the double-direction screw is opposite to the inclined surface of the inclined groove. This means that when the drive gear drives the one-way gear to rotate, the rotation of the one-way gear will not drive the double-direction screw to rotate. When the smooth plate at one end of the rotating gear plate is opposite to the drive gear, the rotating shaft will reset and reverse under the action of the worm spring. At this time, the straight surface of the inclined block inside the double-direction screw is opposite to the straight surface of the inclined groove, causing the one-way gear to drive the double-direction screw to rotate, thereby cleaning the outer wall of the first filter plate with the scraper.

[0012] Preferably, a reciprocating screw is rotatably connected to the inner wall of the extrusion filter plate, and a cleaning plate is threadedly connected to the outer wall of the reciprocating screw; A connecting gear is fixedly installed on the outer wall of the top of the reciprocating screw; The inner wall of the filter box is provided with a sliding groove, and the inside of the sliding groove is provided with internal teeth. The connecting gear is slidably connected inside the sliding groove and meshes with the internal teeth. A sealing slider is fixedly installed on the outer wall of the squeeze filter plate. In use, the device is driven by a screw that can be driven by an externally installed motor. When the screw rotates, the two squeeze filter plates will be displaced relative to each other, and the sewage inside the two squeeze filter plates will be squeezed and filtered, increasing the filtration efficiency and preventing the phenomenon of some sewage remaining unfiltered for a long time due to prolonged static filtration. The squeezed and filtered sewage enters the interior of the settling tank through the second filter plate. At the same time, when the squeeze filter plates are performing squeeze filtration, the connecting gear meshes with the internal teeth, causing the reciprocating screw to rotate. This allows the cleaning plate to clean synchronously while the squeeze filter plates are performing squeeze filtration, preventing impurities from adsorbing and blocking the filtration.

[0013] Preferably, the sealing slider has a sealing column inside, and there are multiple sealing columns. One end of the sealing column is fixedly connected to the inside of the sealing slider through a sealing spring. When the filter plate is squeezed, in order to prevent unfiltered sewage from being discharged through the chute, the sealing column inside the sealing slider seals the inside of the chute. The sealing column guides the squeezed filter plate, ensuring its sliding stability and preventing sewage leakage.

[0014] Preferably, a sealing plate is slidably connected to the inner wall of the second filter plate, and a collection box is installed at the lower part of the second filter plate, with the sealing plate opposite to the top of the collection box; The number of sealing plates is two, and the tops of the two sealing plates are offset by abutting blocks. The abutting blocks match the pushing blocks, which are located at the bottom of one side of the squeeze filter plate.

[0015] Preferably, the cleaning plate is slidably connected to the inside of the fixing plate by a telescopic spring, and the fixing plate is fixedly installed on the outer wall of the fixing box, and the number of fixing plates is two; The fixed box has a collection groove inside, and a sealing plate is slidably connected inside the collection groove. A top groove is provided on the inner wall of the sealing plate. The upper and lower ends of both sides of the fixed box are respectively slidably connected with sealing and opening inclined blocks. The inclined end of the sealing inclined block matches the end of the closing plate, and the inclined end of the opening inclined block matches the abutment groove. When the squeeze filter plate descends, the cleaning plate moves to the uppermost position and descends accordingly. As the two squeeze filter plates gradually close, the cleaning plate slides into the interior of the fixed plate, shrinking and ensuring that the cleaning plate always abuts against the outer wall of the squeeze filter plate. At this time, the closing plate seals the collection groove, and impurities are located in the fixed position. The lower part of the box prevents filtered impurities from mixing with the wastewater above. The continuous displacement of the squeezed filter plate causes the pushing block and the abutting block to collide, which opens the sealing plate. The descent of the fixed box and the cleaning plate allows impurities to enter the interior of the collection box. When the squeezed filter plate returns to its original position, the sealing plate closes. When the fixed box is located at the bottom of the filter box, the abutting inclined block and the abutting groove collide, which opens the sealing plate, facilitating the upward displacement of the fixed box. At the same time, the impurities above are located at the bottom of the fixed box, making it easier to clean and collect the filtered impurities again.

[0016] Preferably, a water pumping pipe is provided on one side of the top of the settling tank, and there are multiple water pumping pipes; this device performs secondary filtration through the settling tank, performs settling treatment through the settling tank, and then extracts the treated water from the top after settling.

[0017] The beneficial effects of this invention are as follows: 1. This device, through the configuration of three wastewater treatment components, enables wastewater to undergo preliminary treatment first through a primary wastewater treatment component, then precise treatment through a secondary wastewater treatment component, and finally settling and sedimentation through a tertiary wastewater treatment component. This achieves thorough treatment of the wastewater, enabling graded and refined treatment, and facilitating discharge from the device. Through multi-stage treatment, it avoids the excessive filtration load and the phenomenon of filter screen clogging that cannot be completely cleaned caused by centralized treatment.

[0018] 2. This device, through the installation of a cleaning box and a sealing box, avoids frequent replacement of the first filter plate during wastewater filtration and prevents filtration degradation caused by machine downtime during replacement. The cleaning box cleans the outer wall of the first filter plate. After cleaning, to prevent impurities from entering the device and increasing the subsequent filtration load, the cleaning box and the sealing box form a fluid channel for backwashing. Furthermore, this device has two cleaning boxes, which can be used alternately to achieve simultaneous sealing and cleaning while filtering, enabling cleaning without stopping the machine.

[0019] 3. After the cleaning box slides into the filter box, the bidirectional lead screw of this device can rotate, thereby causing the scraper to scrape the outer wall of the first filter plate. At the same time, the backflow carries out the impurities, preventing the impurities from staying on the outer wall of the first filter plate. This thoroughly cleans one end of the first filter plate, preventing the impurities from separating due to scraping, and preventing the separated impurities from entering the device.

[0020] 4. In use, this device rotates by driving the extrusion screw, which can be driven by an externally installed motor. As the screw rotates, the two extrusion filter plates shift relative to each other, causing the wastewater inside the plates to be extruded and filtered, increasing filtration efficiency and preventing some wastewater from remaining stagnant and unfiltered for extended periods. The filtered wastewater then passes through the second filter plate into the settling tank. Simultaneously, during the extrusion filtration process, the connecting gear meshes with the internal gears, causing the reciprocating screw to rotate. This allows the cleaning plate to clean synchronously during the extrusion filtration process, preventing impurities from adsorbing and obstructing the filtration process.

[0021] 5. In order to prevent unfiltered sewage from being discharged through the chute when the filter plate is being squeezed, the inside of the chute is sealed by the sealing column inside the sealing slider. The sealing column guides the filter plate during the squeezing process, ensuring its sliding stability and preventing sewage leakage.

[0022] 6. When the squeeze filter plate descends, the cleaning plate moves to the top and descends accordingly. As the two squeeze filter plates gradually close, the cleaning plate slides into the interior of the fixed plate, contracting and ensuring that the cleaning plate always presses against the outer wall of the squeeze filter plate. At this time, the sealing plate seals the collection tank, and impurities are located in the lower part of the fixed box, preventing the filtered impurities from mixing with the sewage above. The continuous displacement of the squeeze filter plate causes the pushing block and the abutting block to abut, which will open the sealing plate. The descent of the fixed box and the cleaning plate will allow impurities to enter the interior of the collection box. When the squeeze filter plate resets, the sealing plate closes, and when the fixed box is located at the bottom of the filter box, the abutting inclined block and the abutting groove open, which will open the sealing plate, facilitating the upward displacement of the fixed box. At the same time, the impurities above are located in the lower part of the fixed box, making it easier to clean and collect the filtered impurities again. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the present invention from the front view; Figure 2 This is a schematic diagram of the interior of the filter box of the present invention; Figure 3 This is a schematic cross-sectional view of the filter box of the present invention; Figure 4 This is a schematic diagram of the interior of the sealed box of the present invention; Figure 5 This is a schematic diagram of the interior of the cleaning box of the present invention; Figure 6 This is a schematic diagram of the end of the one-way gear of the present invention; Figure 7 This is a schematic diagram of the filter box of the present invention in cross-section 2; Figure 8 This is a schematic diagram of the interior of the sealing slider of the present invention; Figure 9 This is a three-dimensional schematic diagram of the cleaning plate of the present invention; Figure 10 This is a schematic diagram of the interior of the fixing box of the present invention.

[0024] In the diagram: 1. Filter box; 101. Inlet tank; 102. Branch pipe; 103. Check valve; 104. Pallet; 2. Sealed box; 201. Cleaning screw; 202. Threaded block; 203. Forward and reverse motor; 204. Connecting pipe; 3. Cleaning box; 301. Rotating shaft; 302. Worm spring; 303. Drive gear; 304. Rotating gear plate; 305. Compression spring; 306. Double-acting lead screw; 307. One-way gear; 308. Scraper; 309. Inner groove; 310. Inclined block; 311. One-way spring; 312. Inclined groove; 4. First filter plate; 5. Extrusion screw; 6. Extrusion filter plate; 601. Reciprocating lead screw; 602. Connecting gear; 603. Slide groove; 604. Internal gear; 605. Sealing slider; 606. Sealing column; 607. Sealing spring; 608. Push block; 7. Cleaning plate; 701. Fixing plate; 702. Telescopic spring; 703. Fixing box; 704. Sealing plate; 705. Top groove; 706. Sealing top inclined block; 707. Opening top inclined block; 708. Collection groove; 8. Second filter plate; 801. Sealing plate; 802. Collection box; 803. Top block; 9. Settling box; 901. Water pumping pipe. Detailed Implementation

[0025] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] A multi-stage sewage treatment device for water conservancy construction, as shown in the attached figure. Figure 1-10As shown, it includes a filter box 1, a primary wastewater treatment component, a secondary wastewater treatment component, and a tertiary wastewater treatment component. The primary and secondary wastewater treatment components are located inside the filter box 1, and the tertiary wastewater treatment component is located at the bottom of the filter box 1 and is in communication with the filter box 1. The top of the filter box 1 is sealed and connected to the inlet tank 101 for fluid conduction. The side wall of the top of the inlet tank 101 is provided with a branch pipe 102. The primary wastewater treatment component includes a sealing box 2, a cleaning box 3, and a first filter plate 4. The first filter plate 4 is located in the upper part of the filter box 1. The sealing box 2 is sealed to the side wall of the top of the filter box 1. The cleaning box 3 slides inside the filter box 1 and the sealing box 2. There are two cleaning boxes 3. The two sealing boxes 2 slide alternately into the filter box 1. The secondary wastewater treatment components include a screw 5, a filter plate 6, a cleaning plate 7, and a second filter plate 8. The screw 5 is rotatably connected inside the filter box 1. The filter plate 6 is threadedly connected to the outer wall of the screw 5. The cleaning plate 7 is slidably connected to the outer wall of the filter plate 6. The second filter plate 8 is located on the inner bottom wall of the filter box 1. The tertiary wastewater treatment unit includes a settling tank 9, which is connected to the bottom of the filter tank 1 via a second filter plate 8. This device, through its triple wastewater treatment system, first performs preliminary treatment through a primary wastewater treatment unit, then precise treatment through a secondary wastewater treatment unit, and finally, settling and sedimentation through a tertiary wastewater treatment unit. This achieves thorough wastewater treatment, enabling graded and refined processing, facilitating discharge from the device. The multi-stage treatment avoids the excessive filtration load and filter clogging issues that can occur with centralized treatment.

[0027] As attached Figure 1-4 As shown, a cleaning screw 201 is rotatably connected inside the filter box 1 and the sealing box 2. One end of the cleaning screw 201 is fixedly connected to the output end of the forward and reverse motor 203, which is fixedly installed outside the sealing box 2. A threaded block 202 is fixedly installed on the outer wall of the cleaning box 3, and the threaded block 202 is threadedly connected to the outer wall of the cleaning screw 201; A connecting pipe 204 is installed at the bottom of the sealed box 2, which is connected to the branch water pipe 102. A one-way valve 103 is installed on the branch water pipe 102, and the flow direction of the one-way valve 103 is from the outside to the inside. When this device is in use, sewage is guided to the inside of the filter box 1 through the inlet tank 101. At this time, by starting the forward and reverse motor 203, the forward and reverse motor 203 drives the cleaning screw 201 to rotate. The threaded block 202 on its outer wall will synchronously drive the cleaning box 3 inside the sealed box 2 to move, so that the sealed box 2 enters the inside of the filter box 1. The cleaning box 3 seals one end of the outer wall of the first filter plate 4. At this time, one end of the first filter plate 4 is in a conductive state, and the other end face forms a fluid channel with the cleaning box 3 and the sealed box 2. At this time, sewage will enter through one end of the first filter plate 4, and a small amount of sewage will enter through the first filter plate 4. Water is returned to the sealed end of the first filter plate 4 to achieve backwashing. The flushed wastewater will re-enter the filter box 1 through the connecting pipe 204 for further filtration. This device, through the arrangement of the cleaning box 3 and the sealing box 2, avoids frequent replacement of the first filter plate 4 and prevents filtration degradation due to machine downtime. The cleaning box 3 cleans the outer wall of the first filter plate 4. After cleaning, to prevent impurities from entering the device and increasing the subsequent filtration load, the cleaning box 3 and the sealing box 2 form a fluid channel for backwashing. Furthermore, this device has two cleaning boxes 3, which can be used alternately to achieve simultaneous sealing and cleaning while filtering, enabling cleaning without stopping the machine.

[0028] As attached Figure 3 As shown, a clamping plate 104 is fixedly installed on the top of the inside of the filter box 1, and the first filter plate 4 is clamped inside the clamping plate 104.

[0029] As attached Figure 5 As shown, a rotating shaft 301 is rotatably connected inside the cleaning box 3. A spiral spring 302 is fixedly installed on the outer wall of one end of the rotating shaft 301, and the other end of the spiral spring 302 is fixedly connected to the inner wall of the cleaning box 3. A drive gear 303 is connected to the outer wall of the middle part of the rotating shaft 301. One side of the drive gear 303 is meshed with the rotating toothed plate 304. One end of the rotating toothed plate 304 is matched with the clamping plate 104. The other end of the rotating toothed plate 304 is fixedly connected to the inner wall of the cleaning box 3 through the compression spring 305. A bidirectional lead screw 306 is rotatably connected to the inner wall of the cleaning box 3. A one-way gear 307 is unidirectionally driven to the outer wall of the middle part of the bidirectional lead screw 306. The one-way gear 307 meshes with the drive gear 303. A scraper 308 is threaded to the outer wall of the bidirectional lead screw 306. The outer wall of the scraper 308 matches the outer wall of the first filter plate 4. After the cleaning box 3 slides into the filter box 1, the bidirectional lead screw 306 of this device can rotate, thereby causing the scraper 308 to scrape the outer wall of the first filter plate 4. At the same time, the backflow carries out impurities, avoiding the phenomenon of impurities remaining on the outer wall of the first filter plate 4. This thoroughly cleans one end of the first filter plate 4, preventing impurities from separating due to scraping and preventing the separated impurities from entering the device.

[0030] As attached Figure 6 As shown, the bidirectional lead screw 306 has an inner groove 309 inside, and an inclined block 310 is slidably connected inside the inner groove 309. One end of the inclined block 310 is triangular in shape, and a one-way spring 311 is fixedly installed at one end of the inclined block 310 inside the inner groove 309. The other end of the one-way spring 311 is fixedly connected to the inner wall of the inner groove 309. The inner wall of the one-way gear 307 has a groove 312, which matches the inclined block 310. When the cleaning box 3 slides into the filter box 1, one end of the rotating toothed plate 304 will abut against one end of the clamping plate 104, causing the rotating toothed plate 304 to move inward. This, in turn, drives the rotating shaft 301 to rotate through the drive gear 303. The worm spring 302 is in a compressed state. At this time, the inclined surface of the inclined block 310 on the inner wall of the double-direction screw 306 is opposite to the inclined surface of the groove 312, so that the drive gear 307... When the unidirectional gear 307 rotates, the rotation of the unidirectional gear 307 will not drive the bidirectional lead screw 306 to rotate. When the smooth plate at one end of the rotating gear plate 304 is opposite to the drive gear 303, the rotating shaft 301 is reset and reversed under the action of the worm spring 302. At this time, the straight surface of the inclined block 310 inside the bidirectional lead screw 306 is opposite to the straight surface of the inclined groove 312, so that the unidirectional gear 307 drives the bidirectional lead screw 306 to rotate, thereby realizing the scraper 308 cleaning the outer wall of the first filter plate 4.

[0031] As attached Figure 7 As shown, a reciprocating screw 601 is rotatably connected to the inner wall of the extrusion filter plate 6, and a cleaning plate 7 is threadedly connected to the outer wall of the reciprocating screw 601. A connecting gear 602 is fixedly installed on the outer wall of the top of the reciprocating screw 601; A groove 603 is provided on the inner wall of the filter box 1. An internal gear 604 is provided inside the groove 603. A connecting gear 602 is slidably connected inside the groove 603 and meshes with the internal gear 604. A sealing slider 605 is fixedly installed on the outer wall of the squeeze filter plate 6. When the device is in use, the squeeze screw 5 is driven to rotate. The squeeze screw 5 can be driven by an externally installed motor. When the squeeze screw 5 rotates, the two squeeze filter plates 6 will be displaced relative to each other. The sewage inside the two squeeze filter plates 6 will be squeezed and filtered, increasing the filtration efficiency and preventing the sewage from remaining stagnant for a long time and not being filtered. The squeezed and filtered sewage enters the settling box 9 through the second filter plate 8. At the same time, when the squeeze filter plate 6 is performing squeeze filtration, the connecting gear 602 meshes with the internal gear 604, causing the reciprocating screw 601 to rotate. This allows the cleaning plate 7 to clean synchronously while the squeeze filter plate 6 is performing squeeze filtration, preventing impurities from being adsorbed and blocking the filtration.

[0032] As attached Figure 8 As shown, the sealing slider 605 has a sealing column 606 inside for sealing and sliding connection. There are multiple sealing columns 606. One end of the sealing column 606 is fixedly connected to the inside of the sealing slider 605 through a sealing spring 607. When the filter plate 6 is squeezed, in order to prevent unfiltered sewage from being discharged through the slide groove 603, the sealing column 606 inside the sealing slider 605 seals the inside of the slide groove 603. The sealing column 606 guides the squeezed filter plate 6, ensuring its sliding stability and preventing sewage leakage.

[0033] As attached Figure 2 and attached Figure 7 As shown, a sealing plate 801 is slidably connected to the inner wall of the second filter plate 8, and a collection box 802 is installed at the lower part of the second filter plate 8, with the sealing plate 801 facing the top of the collection box 802. There are two sealing plates 801. The tops of the two sealing plates 801 are offset by abutting blocks 803. The abutting blocks 803 match the pushing blocks 608, which are located at the bottom of one side of the squeeze filter plate 6.

[0034] As attached Figure 9-10 As shown, the cleaning plate 7 is slidably connected to the inside of the fixing plate 701 by the telescopic spring 702. The fixing plate 701 is fixedly installed on the outer wall of the fixing box 703. There are two fixing plates 701. The inside of the fixed box 703 has a collection groove 708, and the inside of the collection groove 708 is sealed and slidably connected to a sealing plate 704. The inner wall of the sealing plate 704 is provided with a top groove 705. The upper and lower ends of both sides of the fixed box 703 are slidably connected to a sealing abutment block 706 and an opening abutment block 707, respectively. The inclined end of the sealing abutment block 706 matches the end of the closing plate 704, and the inclined end of the opening abutment block 707 matches the abutment groove 705. When the squeeze filter plate 6 descends, the cleaning plate 7 moves to the uppermost position and descends accordingly. As the two squeeze filter plates 6 gradually close, the cleaning plate 7 slides into the interior of the fixed plate 701, achieving contraction. This ensures that the cleaning plate 7 always abuts against the outer wall of the squeeze filter plate 6. At this time, the closing plate 704 seals the collection groove 708, and impurities are located in the lower part of the fixed box 703, avoiding... The phenomenon of impurities after filtration mixing with the upper sewage, the continuous displacement of the squeeze filter plate 6 causes the push block 608 and the abutment block 803 to abut against each other, which will open the sealing plate 801. The descent of the fixed box 703 and the cleaning plate 7 will allow impurities to enter the interior of the collection box 802. When the squeeze filter plate 6 is reset, the sealing plate 801 closes. When the fixed box 703 is located at the lower part of the filter box 1, the abutment inclined block 707 and the abutment groove 705 open to abut against each other, thereby opening the sealing plate 704, which facilitates the upward displacement of the fixed box 703. At the same time, the impurities above are located at the lower part of the fixed box 703, which facilitates the cleaning and collection of the filtered impurities again.

[0035] As attached Figure 1 As shown, a water pumping pipe 901 is provided on one side of the top of the settling tank 9, and there are multiple water pumping pipes 901; this device performs secondary filtration through the settling tank 9, performs settling treatment through the settling tank 9, and then extracts the treated water from the top after settling.

[0036] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A multi-stage sewage treatment device for water conservancy construction, characterized in that, It includes a filter box (1), a primary sewage treatment component, a secondary sewage treatment component and a tertiary sewage treatment component. The primary sewage treatment component and the secondary sewage treatment component are located inside the filter box (1), and the tertiary sewage treatment component is located at the lower part of the filter box (1) and is in communication with the filter box (1). The top of the filter box (1) is sealed and fluid-conductingly connected to the water inlet tank (101), and the side wall of the top of the water inlet tank (101) is provided with a branch water pipe (102). The primary wastewater treatment component includes a sealing box (2), a cleaning box (3), and a first filter plate (4). The first filter plate (4) is located in the upper part of the filter box (1). The sealing box (2) is sealed to the side wall of the top of the filter box (1). The cleaning box (3) slides inside the filter box (1) and the sealing box (2). There are two cleaning boxes (3). The two sealing boxes (2) slide alternately into the filter box (1). The secondary wastewater treatment component includes a screw extrusion screw (5), a filter extrusion plate (6), a cleaning plate (7), and a second filter plate (8). The screw extrusion screw (5) is rotatably connected to the inside of the filter box (1). The filter extrusion plate (6) is threadedly connected to the outer wall of the screw extrusion screw (5). The cleaning plate (7) is slidably connected to the outer wall of the filter extrusion plate (6). The second filter plate (8) is located on the inner bottom wall of the filter box (1). The three-stage wastewater treatment component includes a settling tank (9), which is connected to the bottom of the filter tank (1) through the second filter plate (8).

2. The multi-stage sewage treatment device for water conservancy construction according to claim 1, characterized in that, The filter box (1) and the sealed box (2) are rotatably connected by a cleaning screw (201). One end of the cleaning screw (201) is fixedly connected to the output end of the forward and reverse motor (203). The forward and reverse motor (203) is fixedly installed on the outside of the sealed box (2). A threaded block (202) is fixedly installed on the outer wall of the cleaning box (3), and the threaded block (202) is threadedly connected to the outer wall of the cleaning screw (201); The bottom of the sealed box (2) is equipped with a connecting pipe (204), which is connected to the branch water pipe (102). A one-way valve (103) is installed on the branch water pipe (102), and the flow direction of the one-way valve (103) is from the outside to the inside.

3. A multi-stage sewage treatment device for water conservancy construction according to claim 1, characterized in that, A card plate (104) is fixedly installed on the top inside the filter box (1), and the first filter plate (4) is snapped into the inside of the card plate (104).

4. A multi-stage sewage treatment device for water conservancy construction according to claim 3, characterized in that, The cleaning box (3) is rotatably connected to a rotating shaft (301). A spiral spring (302) is fixedly installed on the outer wall of one end of the rotating shaft (301). The other end of the spiral spring (302) is fixedly connected to the inner wall of the cleaning box (3). A drive gear (303) is connected to the outer wall of the middle part of the rotating shaft (301). One side of the drive gear (303) is meshed with the rotating tooth plate (304). One end of the rotating tooth plate (304) is matched with the clamping plate (104). The other end of the rotating tooth plate (304) is fixedly connected to the inner wall of the cleaning box (3) through a compression spring (305). The inner wall of the cleaning box (3) is also rotatably connected to a two-way lead screw (306). A one-way gear (307) is unidirectionally driven on the outer wall of the middle part of the two-way lead screw (306). The one-way gear (307) meshes with the drive gear (303). A scraper (308) is threaded on the outer wall of the two-way lead screw (306). The outer wall of the scraper (308) matches the outer wall of the first filter plate (4).

5. A multi-stage sewage treatment device for water conservancy construction according to claim 4, characterized in that, The bidirectional lead screw (306) has an inner groove (309) inside, and a wedge (310) is slidably connected inside the inner groove (309). One end of the wedge (310) is triangular in shape, and a one-way spring (311) is fixedly installed at one end of the wedge (310) inside the inner groove (309). The other end of the one-way spring (311) is fixedly connected to the inner wall of the inner groove (309). The inner wall of the one-way gear (307) is provided with a groove (312), which matches the inclined block (310).

6. A multi-stage sewage treatment device for water conservancy construction according to claim 5, characterized in that, A reciprocating screw (601) is rotatably connected to the inner wall of the extrusion filter plate (6), and a cleaning plate (7) is threadedly connected to the outer wall of the reciprocating screw (601). A connecting gear (602) is fixedly installed on the outer wall of the top of the reciprocating screw (601). The filter box (1) has a groove (603) on its inner wall. The groove (603) has an internal tooth (604) inside. The connecting gear (602) is slidably connected inside the groove (603) and meshes with the internal tooth (604). The sealing slider (605) is fixedly installed on the outer wall of the extrusion filter plate (6).

7. A multi-stage sewage treatment device for water conservancy construction according to claim 6, characterized in that, The sealing slider (605) is internally sealed and slidably connected with a sealing post (606). There are multiple sealing posts (606), and one end of the sealing post (606) is fixedly connected to the inside of the sealing slider (605) through a sealing spring (607).

8. A multi-stage sewage treatment device for water conservancy construction according to claim 7, characterized in that, A sealing plate (801) is slidably connected to the inner wall of the second filter plate (8), and a collection box (802) is installed at the lower part of the second filter plate (8). The sealing plate (801) is opposite to the top of the collection box (802). There are two sealing plates (801), and the tops of the two sealing plates (801) are offset by abutting blocks (803). The abutting blocks (803) are matched with pushing blocks (608), which are located at the bottom of one side of the squeeze filter plate (6).

9. A multi-stage sewage treatment device for water conservancy construction according to claim 8, characterized in that, The cleaning plate (7) is slidably connected to the inside of the fixing plate (701) by a telescopic spring (702). The fixing plate (701) is fixedly installed on the outer wall of the fixing box (703). There are two fixing plates (701). The fixed box (703) has a collection groove (708) inside, and a sealing plate (704) is slidably connected inside the collection groove (708). A top groove (705) is provided on the inner wall of the sealing plate (704). The upper and lower ends of the fixed box (703) are respectively slidably connected to a sealing abutment block (706) and an opening abutment block (707). The inclined end of the sealing abutment block (706) matches the end of the closed plate (704), and the inclined end of the opening abutment block (707) matches the abutment groove (705).

10. A multi-stage sewage treatment device for water conservancy construction according to claim 1, characterized in that, A water pump (901) is provided on one side of the top of the settling box (9), and there are multiple water pumps (901).

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