A sewage treatment aeration tank slagging structure

Abstract

This invention relates to the field of wastewater treatment technology, specifically to a sludge discharge structure for an aeration tank in wastewater treatment. The structure includes an aeration tank body, internally divided into an aeration chamber and a sludge discharge trough. A movable frame is mounted on the top of the aeration tank body, and a connecting pipe is mounted on the movable frame. A float is slidably connected to the connecting pipe. An air inlet assembly is located at the bottom of the connecting pipe, and an air source device is located on the side wall of the aeration tank corresponding to the air inlet assembly. A scum scraping assembly is elastically rotatably connected to the side of the float. A lifting assembly is installed inside part of the connecting pipe corresponding to the float. An inclined guiding assembly is located on the inner wall of the aeration tank body corresponding to the scum scraping assembly. A valve assembly connecting the air inlet assembly and the scum scraping assembly is located on the top of the float. This application's overall structure, through the coordinated design of mechanical transmission and pneumatic drive, achieves fully automated sludge discharge of the entire process of scum scraping, lifting, tilting, and blowing, reducing manual intervention costs and ensuring aeration efficiency.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and specifically to a slag discharge structure for a wastewater treatment aeration tank. Background Technology

[0002] In wastewater treatment processes, the aeration tank is the core unit of biological wastewater treatment. It promotes aerobic metabolism of microorganisms by introducing air into the wastewater, thereby degrading organic pollutants in the wastewater. During the aeration process, a large amount of scum is generated in the wastewater. This scum mainly consists of suspended solids, grease, biofilm fragments, and undegraded organic matter. If it is not removed in time, it will accumulate on the surface of the wastewater, hindering gas-liquid exchange, reducing aeration efficiency, and at the same time, promoting the growth of anaerobic bacteria, affecting the wastewater treatment effect, and even causing the effluent quality to fail to meet standards.

[0003] Currently, the main methods for removing scum from existing aeration tanks are manual dredging and mechanical scraping devices. Traditional manual dredging methods are labor-intensive, inefficient, and cannot be operated continuously, making them unsuitable for large-scale wastewater treatment needs. Mechanical scraping devices typically use a fixed scraper plate structure with a fixed height, which cannot adapt to fluctuations in wastewater level, resulting in incomplete scum removal and residues on the tank walls or in corners. In particular, when the wastewater level is lower than the side wall of the scum discharge trough, the scraper plate cannot push the scum to the scum discharge trough.

[0004] Therefore, how to achieve efficient scraping and precise slag discharge to reduce the cost of manual intervention and ensure aeration efficiency is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In order to achieve efficient scraping and precise slag discharge, thereby reducing the cost of manual intervention and ensuring aeration efficiency, this application provides a slag discharge structure for a sewage treatment aeration tank.

[0006] The sludge discharge structure of the wastewater treatment aeration tank provided in this application adopts the following technical solution:

[0007] A sludge discharge structure for an aeration tank in wastewater treatment includes an aeration tank body. A sludge discharge trough partition wall is fixedly installed inside the aeration tank body, dividing the aeration tank body into an aeration tank and a sludge discharge trough. A cover plate is installed on the top of the aeration tank body, covering the aeration tank and the sludge discharge trough. A movable frame is slidably connected to the top surface of the cover plate. Several connecting pipes extending through the cover plate into the interior of the aeration tank are installed on the movable frame. Floats are slidably connected to the connecting pipes. An air inlet assembly is installed at the bottom of the connecting pipes. An air source device is provided on the side wall of the aeration tank corresponding to the air intake component. When the moving frame moves close to the slag discharge trough, the air intake component is connected to the air source device. A scum scraping component is elastically rotatably connected to the side of the float. A lifting component connected to the air intake component is installed inside part of the connecting pipe corresponding to the float. An inclined guiding component is provided on the inner wall of the aeration tank body corresponding to the scum scraping component. A valve assembly is provided on the top of the float. The valve assembly is connected to the air intake component and the scum scraping component.

[0008] Furthermore, the movable frame includes a base, with symmetrically arranged driving rollers and driven rollers rotatably connected to the bottom of the base. A drive shaft is fixedly connected to the driving roller. A reducer is mounted on the base, and a motor is mounted on the reducer. The output shaft of the reducer is fixedly connected to the drive shaft. Symmetrically arranged slide rails are fixedly mounted on the cover plate corresponding to the driving roller and the driven roller. A protective frame is fixedly mounted on the top surface of the base, and the connecting pipe is fixedly mounted on the protective frame.

[0009] Furthermore, the air intake assembly includes an air intake box, one end of which is fixedly and sealed with a sealing slider. The side of the sealing slider away from the air intake box is slidably and sealed to the inner wall of the aeration tank. An air intake hole communicating with the air intake box is opened on the sealing slider. The air source device is located on the inner wall of the aeration tank near the slag discharge trough, corresponding to the position of the air intake hole. An air outlet hole is opened on the top surface of the air intake box corresponding to each of the connecting pipes. The bottom of the connecting pipe is fixedly and sealed to the top surface of the air intake box.

[0010] Furthermore, the air source device includes an air inlet pipe, which is fixedly installed on the side wall of the aeration tank body. A connection hole communicating with the air inlet pipe is opened on the inner wall surface of the aeration tank. A pressure relief hole is opened on the inner wall surface of the aeration tank on the side away from the slag discharge trough from the connection hole. An external compressed air source is connected to the end of the air inlet pipe away from the aeration tank. A sliding groove is opened on the inner wall of the aeration tank corresponding to the connection hole. A sealing plate is slidably connected inside the sliding groove. A sealing return spring is fixedly installed inside the sliding groove. The sealing return spring abuts against the sealing plate. The end of the sealing plate away from the sliding groove protrudes from the inner wall surface of the aeration tank.

[0011] Furthermore, the scum removal assembly includes an L-shaped scum scraper, with a hinge shaft rotatably connected to the outer corner of the scum scraper. The hinge shaft is rotatably connected to the side of the float, and a torsion spring is fitted on the hinge shaft. One end of the torsion spring is fixedly connected to the scum scraper, and the other end of the torsion spring is fixedly connected to the float.

[0012] Furthermore, an airflow cavity is provided inside the scraper plate, and a first flexible hose connected to the airflow cavity is fixedly and sealed to the scraper plate. The first flexible hose is sealed to the valve assembly. An air blowing groove communicating with the airflow cavity is provided at the corner of the inner side of the scraper plate, and the air blowing groove extends smoothly along the surface of the scraper plate to form a collection groove.

[0013] Furthermore, the lifting assembly includes a piston plate, and the piston plate is slidably and sealed inside part of the connecting pipe. A lifting rod is fixedly connected to the top surface of the piston plate. A limiting groove is formed on the upper side wall of the middle part of the connecting pipe along its length direction. A fixing block extending into the limiting groove is fixedly connected to the float. The top of the lifting rod is aligned with the lower surface of the fixing block.

[0014] Furthermore, the inclined guiding component includes guide plates symmetrically arranged on the inner wall of the aeration tank near its top. The surface of the guide plate has a guide groove that is inclined upward toward the slag discharge trough. The side of the guide groove near the bottom of the aeration tank is set as an inclined surface. The two ends of the scum scraping component have pin holes. The pin holes are sealed and slidably connected with guide pins corresponding to the guide grooves. A guide pin spring is fixedly connected between the inner end face of the guide pin and the inner end face of the pin hole.

[0015] Furthermore, the valve assembly includes a valve stem, and the top of the float has at least one valve stem mounting hole. The valve stem is slidably and sealingly installed inside the valve stem mounting hole. An airflow channel penetrating the valve stem mounting hole is provided inside the float. One end of the airflow channel is sealed and connected to the scum scraping assembly, and the other end of the airflow channel is sealed and connected to the air intake assembly. An airflow channel connecting hole is provided on the valve stem. A valve stem spring is fixedly connected to the inner end of the valve stem. The valve stem spring is fixedly abutted against the inside of the valve stem mounting hole. A trigger plate is fixedly connected to the top of the valve stem corresponding to the lower surface of the cover plate.

[0016] Furthermore, a second flexible hose is movably connected inside part of the connecting pipe. One end of the second flexible hose is correspondingly and sealed and fixedly connected to the air intake assembly, and the other end of the second flexible hose is fixedly connected to the float. The float is fixedly connected to a third flexible hose that is sealed and connected to the second flexible hose, and the third flexible hose is sealed and connected to the airflow channel.

[0017] Beneficial effects achieved:

[0018] This application utilizes an elastic rotating connection design between the float and the scum removal component. By leveraging the elastic force of the torsion spring, the scum scraper plate remains in contact with the sewage surface, effectively adapting to dynamic fluctuations in the sewage level. This solves the problems of traditional fixed scum scrapers being unable to adjust with the water level and incomplete scum removal, significantly improving the scum collection effect.

[0019] The mobile frame drives the rollers to move along the slide rail via an electric motor and reducer, realizing the automated operation of the slag scraping action. It eliminates the need for manual retrieval, significantly reducing labor intensity and manual intervention costs. At the same time, it can support continuous operation and is suitable for large-scale sewage treatment scenarios.

[0020] When the mobile frame reaches its limit position, the air intake component and the air source device are precisely connected. The high-pressure gas split drives the lifting component and the valve component. The lifting component pushes the float to rise, so that the scraper is higher than the slag discharge trough partition wall. With the guidance of the tilting guide component, the scraper is precisely tilted towards the slag discharge trough, which solves the problem that the floating slag is difficult to transfer across the partition wall.

[0021] After the valve assembly is opened synchronously, high-pressure gas is sprayed out from the air blowing channel through the airflow chamber of the hose and the scraper, which blows the scum in the collection tank into the scum discharge tank in a directional manner, so as to prevent the scum from scattering and falling back during the transfer process and achieve precise scum discharge.

[0022] The design of the sealing plate and pressure relief hole of the gas source device not only ensures the sealing performance in the non-working state to prevent sewage leakage and gas leakage, but also allows residual gas in the air intake component to be discharged after the operation, thereby improving the operational stability and service life of the device.

[0023] The flexible connection structure between the second and third hoses ensures the sealing and continuity of the gas transmission path without restricting the lifting and lowering movement of the float, further guaranteeing the reliability of the coordinated operation.

[0024] The overall structure of this application achieves fully automated slag removal through the coordinated design of mechanical transmission and pneumatic drive, which includes slag scraping, lifting, tilting and blowing. This ensures that the gas-liquid exchange in the aeration tank is not affected by slag accumulation, maintaining aeration efficiency and sewage treatment effect. It also has the advantages of compact structure, stable operation and convenient maintenance, making it highly practical. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the internal structure of one embodiment of this application.

[0027] Figure 3 This is a structural exploded view of one embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the installation structure of the mobile frame in one embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the cross-sectional structure of one embodiment of this application.

[0030] Figure 6 This is a schematic diagram of the installation structure of the connecting pipe in one embodiment of this application.

[0031] Figure 7 This is a cross-sectional structural schematic diagram of a gas source device in one embodiment of this application.

[0032] Figure 8 This is a schematic diagram of the installation structure of the float in one embodiment of this application.

[0033] Figure 9 yes Figure 2 Enlarged schematic diagram of Part I of the structure.

[0034] Figure 10 yes Figure 5 Enlarged schematic diagram of Part II of the structure.

[0035] Figure 11 yes Figure 5 Enlarged schematic diagram of Part III of the structure.

[0036] Explanation of reference numerals in the attached drawings: 100. Main body of the aeration tank; 101. Partition wall of the slag discharge trough; 102. Aeration tank; 103. Slag discharge trough; 104. Cover plate; 105. Through groove; 106. Slag discharge port; 107. Connecting pipe; 108. Float; 200. Moving frame; 201. Base; 202. Driving roller; 203. Driven roller; 204. Drive shaft; 205. Drive seat; 206. Reducer; 207. Motor; 208. Slide rail; 209. Limiting seat; 210. Protective frame; 300. Air intake assembly; 301. Air intake box; 302. Sealing slider; 303. Air inlet; 304. Air outlet; 400. Air source device; 401. Air inlet pipe; 402. Connecting hole; 403. Slide groove; 404. Sealing plate; 405. Sealing reset spring Spring; 406, Pressure relief hole; 500, Scum scraping assembly; 501, Scum scraper; 502, Hinge shaft; 503, Torsion spring; 504, Airflow chamber; 505, First hose; 506, Air blowing groove; 507, Collection groove; 600, Lifting assembly; 601, Piston plate; 602, Lifting rod; 603, Limiting groove; 604, Fixing block; 700, Inclined guide assembly; 701, Guide plate; 702, Guide groove; 703, Inclined surface; 704, Pin hole; 705, Guide pin; 706, Guide pin spring; 800, Valve assembly; 801, Valve stem; 802, Valve stem mounting hole; 803, Airflow channel; 804, Airflow channel connecting hole; 805, Valve stem spring; 806, Trigger plate; 807, Second hose; 808, Third hose. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present 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.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] This application discloses a slag discharge structure for a sewage treatment aeration tank.

[0041] Please refer to the above as well. Figures 1 to 11 In one embodiment of this application, a slag discharge structure for a wastewater treatment aeration tank includes an aeration tank body 100. A slag discharge trough partition wall 101 is fixedly installed inside the aeration tank body 100, dividing the aeration tank body 100 into an aeration tank 102 and a slag discharge trough 103. A cover plate 104 is installed on the top of the aeration tank body 100, covering the aeration tank 102 and the slag discharge trough 103. Several parallel through-slots 105 are provided on the cover plate 104. A slag discharge port 106 communicating with the slag discharge trough 103 is provided on the side wall of the aeration tank body 100. A movable frame 200 is slidably connected to the top surface of the cover plate 104. Several connecting pipes 107, passing through the through-slots 105 and extending through the cover plate 104 into the aeration tank 102, are provided on the movable frame 204. A float 108 is slidably connected to the connecting pipe 107; an air intake component 300 is provided at the bottom of the connecting pipe 107, and an air source device 400 is provided on the side wall of the aeration tank 102 corresponding to the air intake component 300. When the moving frame 200 moves close to the slag discharge trough 103, the air intake component 300 is connected to the air source device 400; a scum scraping component 500 is elastically rotatably connected to the side of the float 108, and a lifting component 600 connected to the air intake component 300 is installed inside part of the connecting pipe 107 corresponding to the float 108. An inclined guiding component 700 is provided on the inner wall of the aeration tank body 100 corresponding to the scum scraping component 500. A valve component 800 is provided on the top of the float 108, and the valve component 800 is connected to the air intake component 300 and the scum scraping component 500.

[0042] During operation, the wastewater to be treated is first fed into the aeration tank 102. The float 108 floats on the surface of the wastewater due to buoyancy, and the scum scraping component 500 is in the initial scraping posture. The moving frame 200 is in the initial position away from the scum discharge trough 103, the air intake component 300 and the air source device 400 are disconnected, and the lifting component 600 and the valve component 800 are both closed.

[0043] When scum removal is required, the movable frame 200 is activated and slides along the top surface of the cover plate 104. The movable frame 200 simultaneously drives the float 108 and the scum removal assembly 500 to move within the aeration tank 102 via the connecting pipe 107. During the movement, the scum removal assembly 500 remains in contact with the water surface, scraping the scum on the water surface in the aeration tank 102 towards the scum discharge trough 103.

[0044] When the movable frame 200 moves to its extreme position near the slag discharge trough 103, the air intake component 300 at the bottom of the connecting pipe 107 precisely connects and communicates with the air source device 400 on the side wall of the aeration tank 102. The air source device 400 starts, continuously supplying high-pressure gas to the air intake component 300. The high-pressure gas is transmitted in two paths through the air intake component 300:

[0045] The lifting component 600 enters the connecting pipe 107 and extends under air pressure, pushing the float 108 to slide upward along the connecting pipe 107, thereby raising the height of the scum scraping component 500. When the scum scraping component 500 rises to its limit position, it is higher than the top of the scum discharge trough partition wall 101 and enters the tilting guide component 700. Under the guidance of the tilting guide component 700, the scum scraping component 500 tilts along the elastic rotating connection.

[0046] At the same time, the valve assembly 800 installed on the top of the float 108 abuts against the cover plate 104 and the valve assembly 800 is opened. Another gas will enter the scum scraping assembly 500 through the valve assembly 800 on the top of the float 108 to blow away the collected scum. The scum in the scum scraping assembly 500 will be blown into the scum discharge trough 103 and finally discharged through the scum discharge port 106.

[0047] Please refer to the above as well. Figures 1 to 11 In one specific embodiment of this application, the movable frame 200 includes a base 201. The bottom of the base 201 is rotatably connected to a symmetrically arranged driving roller 202 and a driven roller 203. A drive shaft 204 is fixedly connected to the driving roller 202. A drive seat 205 is fixedly installed on the base 201. A reducer 206 is fitted on the drive seat 205. A motor 207 is installed on the reducer 206. The motor 207 is connected to the reducer 206 in a transmission connection. The output shaft of the reducer 206 is fixedly connected to the drive shaft 204. A symmetrically arranged slide rail 208 is fixedly installed on the cover plate 104 corresponding to the driving roller 202 and the driven roller 203. Both ends of the slide rail 208 are provided with a limiting seat 209 fixedly installed on the cover plate 104. A protective frame 210 is fixedly installed on the top surface of the base 201. A connecting pipe 107 is fixedly installed on the protective frame 210.

[0048] During operation, after the motor 207 is started, the power of the motor 207 is reduced by the reducer 206 and transmitted to the drive shaft 204. The drive shaft 204 drives the active roller 202 to roll along the slide rail 208 on the cover plate 104. The driven roller 203 synchronously follows the active roller 202 to slide along another set of slide rails 208, thereby driving the base 201 and the protective frame 210 on the top surface to move smoothly.

[0049] The protective frame 210 drives the connecting pipe 107 fixed on it to move synchronously. The float 108 and the scum scraping component 500 below the connecting pipe 107 move along the extension direction of the slide rail 208 in the aeration tank 102 with the connecting pipe 107.

[0050] When the moving frame 200 moves to its limit position towards the slag discharge trough 103, the limiting seat 209 at the end of the slide rail 208 contacts the roller, restricting the moving frame 200 from moving further. At this time, the air intake component 300 at the bottom of the connecting pipe 107 precisely connects with the air source device 400. When moving in the opposite direction, the moving frame 200 returns to its initial position away from the slag discharge trough 103 along the slide rail 208, waiting for the next slag scraping operation.

[0051] Please refer to the above as well. Figures 1 to 11 In one specific embodiment of this application, the air intake assembly 300 includes an air intake box 301. A sealing slider 302 is fixedly and sealed at one end of the air intake box 301. The side of the sealing slider 302 away from the air intake box 301 is slidably and sealed to the inner wall of the aeration tank 102. An air intake hole 303 communicating with the air intake box 301 is opened on the sealing slider 302. An air source device 400 is set on the inner wall of the aeration tank 102 near the slag discharge trough 103, corresponding to the position of the air intake hole 303. An air outlet hole 304 is opened on the top surface of the air intake box 301 corresponding to each connecting pipe 107. The bottom of the connecting pipe 107 is fixedly and sealed to the top surface of the air intake box 301.

[0052] During operation, the moving frame 200 moves synchronously with the air inlet box 301, and the sealing slider 302 maintains a sealed sliding state with the inner wall of the aeration tank 102. When the moving frame 200 reaches its limit position close to the slag discharge trough 103, the air inlet hole 303 on the sealing slider 302 is precisely aligned and connected with the air source device 400, and high-pressure gas enters the air inlet box 301 through the air inlet hole 303. The air inlet box 301 distributes the high-pressure gas evenly to each connecting pipe 107 through the air outlet holes 304 corresponding to each connecting pipe 107 on its top surface, providing a power source for the subsequent lifting operation of the lifting component 600 and the slag blowing operation of the slag scraping component 500.

[0053] Please refer to the above as well. Figures 1 to 11In one specific embodiment of this application, the air source device 400 includes an air inlet pipe 401, which is fixedly installed on the side wall of the aeration tank body 100. A connection hole 402 communicating with the air inlet pipe 401 is provided on the inner wall of the aeration tank 102. A pressure relief hole 406 is provided on the inner wall of the aeration tank 102 on the side away from the slag discharge trough 103. An external compressed air source is connected to the end of the air inlet pipe 401 away from the aeration tank 102. A sliding groove 403 is provided on the inner wall of the aeration tank 102 corresponding to the connection hole 402. A sealing plate 404 is internally sealed and slidably connected to the slide groove 403. A sealing return spring 405 is fixedly installed inside the slide groove 403. The sealing return spring 405 abuts against the sealing plate 404 so that the sealing plate 404 blocks the connection hole 402 and the pressure relief hole 406. The end of the sealing plate 404 away from the slide groove 403 protrudes from the inner wall of the aeration tank 102 so that when the sealing slider 302 in the air intake assembly 300 moves, it can push the sealing plate 404 to slide, thereby connecting the air intake hole 303 on the sealing slider 302 in the air intake assembly 300 with the connection hole 402.

[0054] During operation, in the initial state, the sealing return spring 405 always abuts against the sealing plate 404, causing the sealing plate 404 to block the connection hole 402 and the pressure relief hole 406. This prevents sewage in the aeration tank 102 from entering the air inlet pipe 401 and also prevents sewage in the aeration tank 102 from leaking through the pressure relief hole 406. When the moving frame 200 moves the air inlet assembly 300 towards the slag discharge trough 103, the sealing slider 302 contacts the end of the sealing plate 404 that protrudes from the inner wall of the aeration tank 102 and continuously pushes the sealing plate 404 to slide along the slide groove 403, while simultaneously compressing the sealing return spring 405. When the moving frame 200 reaches its limit position, the air inlet 303 on the sealing slider 302 is precisely aligned with the connecting hole 402. The high-pressure gas from the external compressed air source is sequentially transmitted to the air intake assembly 300 through the air intake pipe 401, the connecting hole 402, and the air inlet 303. After the slag scraping operation is completed, the moving frame 200 drives the sealing slider 302 to move in the reverse direction to reset. During the reverse movement, when the air inlet 303 separates from the connecting hole 402, the air inlet 303 will align with the pressure relief hole 406. The compressed gas remaining inside the air intake assembly 300 will be discharged through the pressure relief hole 406. When the air inlet 303 separates from the pressure relief hole 406, the sealing reset spring 405 elastically resets, thereby pushing the sealing plate 404 to re-seal the connecting hole 402 and the pressure relief hole 406.

[0055] Please refer to the above as well. Figures 1 to 11In one specific embodiment of this application, the scum removal assembly 500 includes an L-shaped scum scraper 501. A hinge shaft 502 is rotatably connected to the outer corner of the scum scraper 501. The hinge shaft 502 is rotatably connected to the side of the float 108. A torsion spring 503 is fitted on the hinge shaft 502. One end of the torsion spring 503 is fixedly connected to the scum scraper 501, and the other end of the torsion spring 503 is fixedly connected to the float 108. When no external force is applied, the torsion spring 503 automatically rotates the scum scraper 501 to fit against the side of the float 108.

[0056] During operation, the torsion spring 503, unaffected by external forces, drives the scraper plate 501 to rotate around the hinge shaft 502, ensuring the scraper plate 501 remains close to the side of the float 108. When the float 108 moves with the moving frame 200 to scrape scum, the torsion spring 503 provides elastic force, keeping the scraper plate 501 in constant contact with the wastewater surface, efficiently collecting surface scum. When the float 108 is lifted by the lifting assembly 600 and enters the tilting guide assembly 700, the scraper plate 501 tilts around the hinge shaft 502 under guidance, and the torsion spring 503 is twisted to store energy.

[0057] Please refer to the above as well. Figures 1 to 11 In one specific embodiment of this application, an airflow cavity 504 is provided inside the scraper plate 501, and a first flexible hose 505 connected to the airflow cavity 504 is fixedly and sealed on the scraper plate 501. The first flexible hose 505 is sealed to the valve assembly 800. An air blowing groove 506 communicating with the airflow cavity 504 is provided at the corner of the inner side of the scraper plate 501. The air blowing groove 506 extends smoothly along the surface of the scraper plate 501 to form a collection groove 507.

[0058] During operation, when the scraper blade 501 scrapes scum against the water surface, the collection trough 507 collects the scraped scum, preventing it from scattering. When the valve assembly 800 is opened, high-pressure gas is delivered through the first hose 505 to the airflow chamber 504 inside the scraper blade 501, and then directionally sprayed along the smoothly transitioned collection trough 507 through the air blowing groove 506 connected to the airflow chamber 504. The sprayed airflow precisely acts on the scum in the collection trough 507, efficiently blowing the scum into the scum discharge trough 103.

[0059] Please refer to the above as well. Figures 1 to 11 In one specific embodiment of this application, the lifting assembly 600 includes a piston plate 601, and the piston plate 601 is slidably connected inside a portion of the connecting pipe 107. A lifting rod 602 is fixedly connected to the top surface of the piston plate 601. A limiting groove 603 is formed on the upper side wall of the middle part of the connecting pipe 107 along its length direction. A fixing block 604 extending into the limiting groove 603 is fixedly connected to the float 108. The top of the lifting rod 602 is aligned with the lower surface of the fixing block 604.

[0060] During operation, high-pressure gas enters the connecting pipe 107, where the piston plate 601 is installed, through the air intake assembly 300. This pushes the piston plate 601, which is in a sealed sliding connection, to move upward. Simultaneously, the piston plate 601 drives the lifting rod 602 on the top surface to move upward. After the top of the lifting rod 602 abuts against the lower surface of the fixed block 604, it continuously applies an upward thrust, which causes the float 108, which is fixedly connected to the fixed block 604, to slide upward along the connecting pipe 107 to its limit position.

[0061] Please refer to the above as well. Figures 1 to 11 In one specific embodiment of this application, the inclined guide assembly 700 includes guide plates 701 symmetrically arranged on the inner wall surface of the aeration tank 102 near its top. The surface of the guide plate 701 is provided with a guide groove 702 that is inclined upward toward the slag discharge trough 103. The side of the guide groove 702 near the bottom of the aeration tank 102 is provided with an inclined surface 703. The two ends of the slag scraper 501 in the scum scraping assembly 500 are provided with pin holes 704. The pin holes 704 are sealed and slidably connected with guide pins 705 corresponding to the guide groove 702. A guide pin spring 706 is fixedly connected between the inner end face of the guide pin 705 and the inner end face of the pin hole 704.

[0062] During operation, the guide pin spring 706 pushes the guide pin 705 partially out of the pin hole 704. When the float 108 is lifted by the lifting assembly 600, the scraper plate 501 rises synchronously. The extended guide pin 705 first contacts the inclined surface 703 of the guide plate 701 and slides along it, then slides into the guide groove 702 that slopes upward toward the slag discharge trough 103. As the float 108 continues to rise, the guide groove 702 generates a lateral guiding force on the guide pin 705, causing the scraper plate 501 to tilt around the hinge shaft 502, so that the collection trough 507 faces the slag discharge trough 103. After the slag is blown away, the moving frame 200 slides in the opposite direction along the top surface of the cover plate 104. The moving frame 200 synchronously drives the float 108 and the slag scraping assembly 500 to move in the opposite direction within the aeration tank 102 through the connecting pipe 107. Under the traction of the moving frame 200, the guide pin 705 at the end of the scraper 501 will slide out of the guide groove 702 through the inclined surface 703. The guiding force of the inclined guide component 700 on the scraper 501 will disappear, the torsion spring 503 will elastically reset, and drive the scraper 501 to rotate back to the initial position, waiting for the next scraping operation.

[0063] Please refer to the above as well. Figures 1 to 11In one specific embodiment of this application, the valve assembly 800 includes a valve stem 801. At least one valve stem mounting hole 802 is provided at the top of the float 108. The valve stem 801 is slidably and sealingly mounted inside the valve stem mounting hole 802. An airflow channel 803 is provided inside the float 108, penetrating the valve stem mounting hole 802. One end of the airflow channel 803 is sealed and connected to the first flexible hose 505 in the scum scraping assembly 500, and the other end of the airflow channel 803 is sealed and connected to the air outlet 304 in the air inlet assembly 300. The valve stem 801... An airflow channel connecting hole 804 is provided on the upper part. A valve stem spring 805 is fixedly connected to the inner end of the valve stem 801. The valve stem spring 805 is fixedly abutted against the inside of the valve stem mounting hole 802 to push the valve stem 801 upward so that the airflow channel connecting hole 804 and the airflow channel 803 are misaligned and blocked. A trigger plate 806 is fixedly connected to the top of the valve stem 801 corresponding to the lower surface of the cover plate 104. When the trigger plate 806 abuts against the cover plate 104, the trigger plate 806 will drive the valve stem 801 to move downward so that the airflow channel connecting hole 804 and the airflow channel 803 are aligned and connected.

[0064] During operation, in the initial state, the valve stem spring 805 pushes the valve stem 801 upward, causing the airflow channel connecting hole 804 on the valve stem 801 to misalign with the airflow channel 803 inside the float 108, thus blocking gas flow. When the float 108 is lifted by the lifting assembly 600, the trigger plate 806 at the top of the valve stem 801 abuts against the lower surface of the cover plate 104, causing the valve stem 801 to move downward along the valve stem mounting hole 802, while simultaneously compressing the valve stem spring 805. When the valve stem 801 moves down to the designated position, the airflow channel connecting hole 804 and the airflow channel 803 are precisely aligned. The high-pressure gas delivered by the air outlet 304 in the air intake assembly 300 is delivered to the scum scraping assembly 500 through the airflow channel 803 and the airflow channel connecting hole 804 via the first hose 505. After the operation is completed, the float 108 descends, the trigger plate 806 disengages from the cover plate 104, the valve stem spring 805 elastically resets and pushes the valve stem 801 upward, and the airflow channel connecting hole 804 and the airflow channel 803 are misaligned again, blocking the airflow.

[0065] Please refer to the above as well. Figures 1 to 11 In one specific embodiment of this application, a second hose 807 is movably connected inside a portion of the connecting pipe 107. One end of the second hose 807 is sealed and fixedly connected to the air outlet 304 on the air intake box 301 in the air intake assembly 300. The other end of the second hose 807 is fixedly connected to the float 108. The float 108 is fixedly connected to a third hose 808 that is sealed and connected to the second hose 807. The third hose 808 is sealed and connected to the airflow channel 803.

[0066] During operation, one end of the second hose 807 is sealed and fixed to the air outlet 304 on the air inlet box 301, and the other end is fixed to the float 108. The third hose 808 seals and connects the second hose 807 to the airflow channel 803, forming a continuous and sealed gas transmission path. When the float 108 slides up and down along the connecting pipe 107, the second hose 807 and the third hose 808 can deform flexibly, neither restricting the movement of the float 108 nor hindering its sealing. After the high-pressure gas flows out from the air outlet 304, it is smoothly transported to the airflow channel 803 through the second hose 807 and the third hose 808 in sequence, providing a stable gas source for subsequent scum removal.

[0067] The implementation principle of the slag discharge structure of a wastewater treatment aeration tank in this application embodiment is as follows:

[0068] After the wastewater to be treated is injected into the aeration tank 102, the float 108 floats on the water surface by buoyancy. The scum scraping component 500 adheres to the float 108 under the action of the torsion spring 503. The moving frame 200 is in the initial position away from the scum discharge trough 103. The air source device 400, the lifting component 600, and the valve component 800 are all in the closed state.

[0069] When the scum scraping operation is started, the motor 207 drives the drive shaft 204 to rotate via the reducer 206, which drives the active roller 202 and the driven roller 203 to move along the slide rail 208. The moving frame 200 pulls the float 108 and the scum scraper 501 to move through the connecting pipe 107. The torsion spring 503 provides elastic force to keep the scum scraper 501 in contact with the water surface. The collection tank 507 scrapes the scum synchronously.

[0070] When the movable frame 200 reaches the limit position of the limit seat 209, the sealing slider 302 pushes the sealing plate 404 to compress the sealing return spring 405, first opening the pressure relief hole 406 to balance the pressure, and then the air inlet 303 aligns with the connecting hole 402, connecting the air source device 400 to the air intake assembly 300. The high-pressure gas from the external compressed air source is output in two paths through the air intake box 301:

[0071] The piston plate 601 moves upward through the connecting pipe 107, and the lifting rod 602 pushes the fixing block 604, causing the float 108 to rise along the connecting pipe 107. At the same time, the guide pin 705 of the scraper plate 501 slides into the guide groove 702 along the inclined surface 703 of the guide plate 701. Under the action of the guiding force, it tilts around the hinge shaft 502, so that the collection groove 507 faces the slag discharge groove 103.

[0072] Another gas is delivered to the airflow channel 803 of the float 108 via the second hose 807 and the third hose 808. When the float 108 rises to the point where the trigger plate 806 abuts the cover plate 104, the valve stem 801 moves down to align the airflow channel connecting hole 804 with the airflow channel 803. The high-pressure gas enters the airflow chamber 504 of the scraper plate 501 via the first hose 505 and is directionally ejected from the blowing groove 506, blowing the scum in the collection tank 507 into the scum discharge tank 103, and finally discharged through the scum discharge port 106.

[0073] After the slag scraping is completed, the moving frame 200 reverses and resets, the sealing slider 302 disengages from the sealing plate 404, and the sealing reset spring 405 pushes the sealing plate 404 to re-seal the connection hole 402 and the pressure relief hole 406. After the residual gas in the air intake assembly 300 is discharged through the pressure relief hole 406, the float 108 will descend with the moving frame 200, the trigger plate 806 will disengage from the cover plate 104, and the valve stem spring 805 will push the valve stem 801 to reset and block the airflow. The guide pin 705 slides out from the guide groove 702, and the torsion spring 503 drives the slag scraper 501 to return to its initial posture. The overall structure returns to its initial state and waits for the next slag discharge operation.

[0074] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A slag discharge structure for a wastewater treatment aeration tank, characterized in that: The system includes an aeration tank body (100), inside which a slag discharge trough partition wall (101) is fixedly installed. The slag discharge trough partition wall (101) divides the aeration tank body (100) into an aeration tank (102) and a slag discharge trough (103). A cover plate (104) covering the aeration tank (102) and the slag discharge trough (103) is installed on the top of the aeration tank body (100). A movable frame (200) is slidably connected to the top surface of the cover plate (104). Several connecting pipes (107) are provided on the movable frame (200) that penetrate the cover plate (104) and extend into the aeration tank (102). A float (108) is slidably connected to the aeration tank (102); an air intake component (300) is provided at the bottom of the connecting pipe (107), and an air source device (400) is provided on the side wall of the aeration tank (102) corresponding to the air intake component (300). When the moving frame (200) moves close to the slag discharge trough (103), the air intake component (300) is connected to the air source device (400); a scum scraping component (500) is elastically rotatably connected to the side of the float (108), and a lifting component (600) connected to the air intake component (300) is installed inside part of the connecting pipe (107) corresponding to the float (108). The aeration tank body (102) is slidably connected to the aeration tank (103). The inner wall of the float (0) is provided with an inclined guide component (700) corresponding to the scum scraping component (500). A valve component (800) is provided on the top of the float (108). The valve component (800) is connected to the air intake component (300) and the scum scraping component (500). The scum scraping component (500) includes an L-shaped scraper (501). A hinge shaft (502) is rotatably connected to the corner of the outer side of the scraper (501). The hinge shaft (502) is rotatably connected to the side of the float (108). A torsion spring (503) is fitted on the hinge shaft (502). One end of the torsion spring (503) is connected to the scraper. The slag plate (501) is fixedly connected, and the other end of the torsion spring (503) is fixedly connected to the float (108); the lifting assembly (600) includes a piston plate (601), and the piston plate (601) is slidably connected inside part of the connecting pipe (107), and a lifting rod (602) is fixedly connected to the top surface of the piston plate (601); a limiting groove (603) is opened along the length direction on the side wall of the middle part of the connecting pipe (107), and a fixing block (604) extending into the limiting groove (603) is fixedly connected to the float (108), and the top of the lifting rod (602) is aligned with the lower surface of the fixing block (604);The inclined guide assembly (700) includes guide plates (701) symmetrically arranged on the inner wall of the aeration tank (102) near its top. The surface of the guide plate (701) has a guide groove (702) angled upwards toward the slag discharge trough (103). The side of the guide groove (702) near the bottom of the aeration tank (102) is set as an inclined surface (703). The scum scraping assembly (500) has pin holes (704) at both ends. A guide pin (705) corresponding to the guide groove (702) is slidably connected inside the pin hole (704). A guide pin spring (706) is fixedly connected between the inner end face of the guide pin (705) and the inner end face of the pin hole (704). The valve assembly (800) includes a valve stem (801). The top of the float (108) is opened... The device has at least one valve stem mounting hole (802), and the valve stem (801) is slidably and sealingly installed inside the valve stem mounting hole (802). An airflow channel (803) is opened inside the float (108) through the valve stem mounting hole (802). One end of the airflow channel (803) is sealed and connected to the scum scraping assembly (500), and the other end of the airflow channel (803) is sealed and connected to the air intake assembly (300). An airflow channel connecting hole (804) is opened on the valve stem (801). A valve stem spring (805) is fixedly connected to the inner end of the valve stem (801), and the valve stem spring (805) is fixedly abutted against the inside of the valve stem mounting hole (802). A trigger plate (806) is fixedly connected to the top of the valve stem (801) corresponding to the lower surface of the cover plate (104).

2. The slag discharge structure of a wastewater treatment aeration tank according to claim 1, characterized in that: The movable frame (200) includes a base (201), with a symmetrically arranged driving roller (202) and driven roller (203) rotatably connected to the bottom of the base (201). A drive shaft (204) is fixedly connected to the driving roller (202). A reducer (206) is installed on the base (201), and a motor (207) is installed on the reducer (206). The output shaft of the reducer (206) is fixedly connected to the drive shaft (204). A symmetrically arranged slide rail (208) is fixedly installed on the cover plate (104) corresponding to the driving roller (202) and the driven roller (203). A protective frame (210) is fixedly installed on the top surface of the base (201), and the connecting pipe (107) is fixedly installed on the protective frame (210).

3. The slag discharge structure of a wastewater treatment aeration tank according to claim 1, characterized in that: The air intake assembly (300) includes an air intake box (301). A sealing slider (302) is fixedly and sealed at one end of the air intake box (301). The side of the sealing slider (302) away from the air intake box (301) is slidably connected to the inner wall of the aeration tank (102). An air intake hole (303) communicating with the air intake box (301) is provided on the sealing slider (302). The air source device (400) is located on the inner wall of the aeration tank (102) near the slag discharge trough (103) at the position corresponding to the air intake hole (303). An air outlet hole (304) is provided on the top surface of the air intake box (301) corresponding to each of the connecting pipes (107). The bottom of the connecting pipe (107) is fixedly and sealed to the top surface of the air intake box (301).

4. The slag discharge structure of a wastewater treatment aeration tank according to claim 1, characterized in that: The air source device (400) includes an air inlet pipe (401), which is fixedly installed on the side wall of the aeration tank body (100). A connection hole (402) communicating with the air inlet pipe (401) is provided on the inner wall of the aeration tank (102). A pressure relief hole (406) is provided on the inner wall of the aeration tank (102) on the side away from the slag discharge trough (103) of the connection hole (402). The air inlet pipe (401) is located away from the aeration tank (102) on one side... An external compressed air source is connected to the end of the aeration tank (102). A sliding groove (403) is provided on the inner wall of the aeration tank (102) corresponding to the connection hole (402). A sealing plate (404) is slidably connected inside the sliding groove (403). A sealing return spring (405) is fixedly installed inside the sliding groove (403). The sealing return spring (405) abuts against the sealing plate (404). One end of the sealing plate (404) away from the sliding groove (403) protrudes from the inner wall surface of the aeration tank (102).

5. The slag discharge structure of a wastewater treatment aeration tank according to claim 1, characterized in that: An airflow cavity (504) is provided inside the scraper plate (501). A first hose (505) connected to the airflow cavity (504) is fixedly and sealed on the scraper plate (501). The first hose (505) is sealed to the valve assembly (800). An air blowing groove (506) communicating with the airflow cavity (504) is provided at the corner of the inner side of the scraper plate (501). The air blowing groove (506) extends smoothly along the surface of the scraper plate (501) to form a collection groove (507).

6. The slag discharge structure of a wastewater treatment aeration tank according to claim 1, characterized in that: A second hose (807) is movably connected inside the connecting pipe (107). One end of the second hose (807) is sealed and fixedly connected to the air intake assembly (300). The other end of the second hose (807) is fixedly connected to the float (108). The float (108) is fixedly connected to a third hose (808) that is sealed and connected to the second hose (807). The third hose (808) is sealed and connected to the airflow channel (803).

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