A purification sedimentation tank for urban sewage treatment

Abstract

The utility model discloses a purification sedimentation tank for urban sewage treatment, including sedimentation tank, filter mechanism, the inside movable installation of sedimentation tank is used for filtering the impurity in sewage, through the setting of filter mechanism, filter mechanism is composed of two groups of filter frame, and through the lifting mechanism can easily promote it to the top of sedimentation tank, and the staff can carry out the comprehensive cleaning to the impurity in filter frame through the extraction of waste baffle, and the cleaning efficiency is greatly improved. Make the impurity discharge more convenient and fast, through the setting of lifting mechanism, can drive filter mechanism through lifting mechanism and ascend by section, can drive filter mechanism and ascend height leak out top filter frame first, can clean the larger impurity filtered in top filter frame first, continue to ascend through the drive of lifting mechanism, make the filter frame of bottom leak out sedimentation tank, and then can clean the smaller impurity filtered in top filter frame.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a purification sedimentation tank for urban wastewater treatment. Background Technology

[0002] In the process of urban development, wastewater treatment is a crucial link in ensuring the ecological environment and the quality of life for residents. With the acceleration of urbanization, the volume of urban wastewater discharge is increasing day by day, and the composition of wastewater is becoming increasingly complex, containing a large amount of solid impurities, suspended solids, and various pollutants. If this wastewater is discharged directly without effective treatment, it will cause serious damage to the ecological environment such as water bodies and soil, thereby threatening human health and survival. The filtration structure of existing sedimentation tanks is usually relatively fixed, and the solid impurities filtered out on the filter screen are inconvenient to clean, and impurities that are difficult to clean are easily left behind.

[0003] For example, a purification sedimentation tank for urban sewage treatment (Announcement No.: CN219050631U) includes a sedimentation tank body... The end of a connecting rod extends to the bottom of the sedimentation tank and is connected to a connecting block. A first filter screen is provided in the filter section on the connecting plate. A first drive motor is provided on the top of the support frame. The drive shaft of the first drive motor passes through the support frame and is connected to a screw.

[0004] Based on the search of the aforementioned patents and the discovery of existing equipment, the aforementioned equipment, when in use, uses a first drive motor to drive a screw to rotate, causing a threaded slider to drive a connecting rod to rise through a support plate and a connecting plate. This causes the connecting rod to lift the first and second filter screens. The second filter screen lacks openings for cleaning impurities, making it difficult to clean the impurities filtered out of the second filter screen. In other words, the existing sedimentation tank filtration structure is usually relatively fixed, making it inconvenient to clean the solid impurities filtered out of the filter screens, and it is easy for impurities that are difficult to clean to remain. Therefore, we need to propose a purification sedimentation tank for urban sewage treatment. Utility Model Content

[0005] The purpose of this utility model is to provide a purification sedimentation tank for urban sewage treatment. Through the setting of the filtration mechanism, impurities in sewage can be filtered and separated. At the same time, the filtered impurities can be lifted to the top of the sedimentation tank by the lifting mechanism. Workers can stand outside the sedimentation tank to thoroughly clean the impurities in the filter frame, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A purification sedimentation tank for urban wastewater treatment, including a sedimentation tank; The filtration mechanism, which is installed inside the sedimentation tank, is used to filter impurities in the wastewater. The lifting mechanism, installed on the top of the sedimentation tank, is used to drive the filtration mechanism to rise above the sedimentation tank for cleaning and to descend into the sedimentation tank to filter wastewater. The filtration mechanism includes two sets of filter frames, which are fixedly installed vertically by a bracket. The top filter frame is connected to the lifting mechanism. Side filter screens are fixedly installed inside the side walls of both sides of the filter frame, and a bottom filter screen is fixedly installed at the bottom of the filter frame. A waste discharge baffle is detachably installed inside the side wall at one end of the filter frame.

[0007] Preferably, the lifting mechanism includes a gantry frame, which is fixedly installed on the bottom outer side of the two side walls of the sedimentation tank. Threaded rods are rotatably installed on the inside of both sides of the gantry frame via bearings. A drive assembly is connected to the top outer wall of the two sets of threaded rods, and sliding blocks are threadedly installed on the outer wall of the threaded rods. The bottom of the two sets of sliding blocks are fixedly installed to the top of both sides of the top filter frame via bolts.

[0008] Preferably, the drive assembly includes a dual-axis motor, which is fixedly mounted on the surface of the top cavity of the gantry frame via a motor mount. One end of each of the two output shafts of the dual-axis motor is fixedly mounted with a rotating shaft via a coupling. The outer walls of opposite ends of the two sets of rotating shafts are fixedly sleeved with driving bevel gears. One side of each set of driving bevel gears is meshed with a driven bevel gear. The two sets of driven bevel gears are respectively fixedly sleeved on the outer walls of the two sets of threaded rods.

[0009] Preferably, the drive assembly further includes two sets of support seats, which are respectively fixedly installed on the surface of the cavity at the top of the gantry frame. Each set of support seats is equipped with a bearing, and the rotating shaft is rotatably connected to the support seat through the bearing.

[0010] Preferably, the lifting mechanism further includes a limiting slide groove. The gantry frame has a limiting slide groove on one side of each of the two sets of threaded rods. A limiting slider is slidably installed inside each of the two sets of limiting slide grooves. One side of each of the two sets of limiting sliders is fixedly connected to one side of each of the two sets of sliding blocks.

[0011] Preferably, a slot is provided on the top of the side wall at one end of the filter frame, the bottom of the waste discharge baffle is inserted into the slot, and the top is bolted to the top surface of the filter frame.

[0012] Preferably, it also includes a drain pipe and a solenoid valve, wherein the drain pipe is installed through the bottom of one side of the sedimentation tank, and the solenoid valve is fixedly installed on the outer wall of the drain pipe.

[0013] Preferably, it also includes two sets of protective covers, both sets of protective covers being fixedly installed on both sides of the gantry frame by bolts.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model features a filtration mechanism consisting of two sets of filter frames. A lifting mechanism allows the frame to be easily raised above the sedimentation tank. Workers standing outside the sedimentation tank can then remove the waste discharge baffle to thoroughly clean the impurities within the filter frames, significantly improving cleaning efficiency and making impurity discharge more convenient and faster. 2. This utility model, through the setting of the lifting mechanism, can drive the filter mechanism to rise in stages. First, the filter mechanism can be raised to the height of the top filter frame to clean the larger impurities filtered out in the top filter frame. Then, the lifting mechanism can be used to continue to rise so that the bottom filter frame can be exposed in the sedimentation tank, thereby cleaning the smaller impurities filtered out in the top filter frame. Attached Figure Description

[0015] Figure 1 This is a side view of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the filtration mechanism and the lifting mechanism of this utility model; Figure 3 This is a schematic diagram of the lifting mechanism of this utility model; Figure 4 This is a schematic diagram of the filter mechanism of this utility model; Figure 5 This is a schematic diagram of the drive assembly and two sets of threaded rods of this utility model.

[0016] In the diagram: 1. Sedimentation tank; 2. Filtration mechanism; 21. Filter frame; 22. Side filter screen; 23. Bottom filter screen; 24. Insertion slot; 25. Waste discharge baffle; 3. Lifting mechanism; 31. Gantry frame; 32. Threaded rod; 33. Drive assembly; 331. Dual-axis motor; 332. Rotating shaft; 333. Driving bevel gear; 334. Driven bevel gear; 335. Support base; 34. Sliding block; 35. Limiting slide groove; 36. Limiting slider; 4. Drain pipe; 5. Solenoid valve; 6. Protective cover. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-5 This utility model provides a technical solution: A purification sedimentation tank for urban sewage treatment includes a sedimentation tank 1; The filter unit 2 is movably installed inside the sedimentation tank 1 and is used to filter impurities in the wastewater; The lifting mechanism 3 is installed on the top of the sedimentation tank 1 and is used to drive the filter mechanism 2 to rise above the sedimentation tank 1 for cleaning and to descend into the sedimentation tank 1 to filter the sewage. The sedimentation tank 1 is made of Q235B carbon steel welded together, and the inner wall is sprayed with an epoxy resin anti-corrosion coating with a thickness of ≥0.3mm, which can withstand the acid and alkali corrosion and microbial erosion in urban sewage. In an optional embodiment: the filter mechanism 2 includes two sets of filter frames 21, which are fixedly installed on the top and bottom of the frame via a bracket. The top filter frame 21 is connected to the lifting mechanism 3. Side filters 22 are fixedly installed inside the side walls of both sides of the filter frame 21. A bottom filter 23 is fixedly installed at the bottom of the filter frame 21. A waste discharge baffle 25 is detachably installed inside the side wall at one end of the filter frame 21.

[0019] It should be noted that the two sets of filter frames 21 are welded and fixed by four Φ16mm stainless steel connecting rods to form a three-dimensional filtration space. The side filter screen 22 and bottom filter screen 23 of the upper filter frame 21 are made of 20-mesh stainless steel wire mesh (0.7mm wire diameter), and the side filter screen 22 and bottom filter screen 23 of the lower filter frame 21 are made of 50-mesh stainless steel wire mesh (0.3mm wire diameter), forming a graded filtration structure. A nitrile rubber sealing gasket is set between the waste discharge baffle 25 and the filter frame 21.

[0020] In an optional embodiment: the lifting mechanism 3 includes a gantry frame 31, which is fixedly installed on the bottom outer side of the side walls of both sides of the sedimentation tank 1. Threaded rods 32 are rotatably installed on the inside of both sides of the gantry frame 31 through bearings. The top outer walls of the two sets of threaded rods 32 are connected to a drive assembly 33, and sliding blocks 34 are threadedly installed on the outer walls of the threaded rods 32. The bottoms of the two sets of sliding blocks 34 are fixedly installed to the top of both sides of the top filter frame 21 by bolts.

[0021] It should be noted that the gantry frame 31 is welded with 10# hot-rolled channel steel, and the bottom plate is welded and fixed to the side wall of the sedimentation tank 1. The threaded rod 32 adopts T8 trapezoidal thread (pitch 5mm), and the surface is quenched (hardness HRC45-50). The clearance between the threaded rod and the sliding block 34 is ≤0.1mm, and the transmission efficiency is over 80%.

[0022] In an optional embodiment: the drive assembly 33 includes a dual-axis motor 331, which is fixedly mounted on the surface of the top cavity of the gantry frame 31 via a motor mount. One end of each of the two output shafts of the dual-axis motor 331 is fixedly mounted with a rotating shaft 332 via a coupling. The outer walls of opposite ends of the two sets of rotating shafts 332 are fixedly sleeved with driving bevel gears 333. One side of each set of driving bevel gears 333 is meshed with a driven bevel gear 334. The two sets of driven bevel gears 334 are respectively fixedly sleeved on the outer walls of the two sets of threaded rods 32.

[0023] It should be noted that the dual-axis motor 331 is a Y2-112M-4 type three-phase asynchronous motor with a rated power of 4kW, a speed of 1440r / min, a protection level of IP55, an insulation class of F, and is compatible with 380V three-phase power supply. The driving bevel gear 333 and the driven bevel gear 334 both have a module of 3, a gear ratio of 1:2, a transmission ratio of 2:1, and the bevel gear surface is carburized and quenched (hardness HRC58-62). The meshing backlash is controlled at 0.15-0.2mm.

[0024] In an optional embodiment, the drive assembly 33 further includes two sets of support seats 335, which are respectively fixedly installed on the surface of the top cavity of the gantry frame 31. Each set of support seats 335 is equipped with a bearing, and the rotating shaft 332 is rotatably connected to the support seat 335 through the bearing.

[0025] The dual-axis motor 331 drives the active bevel gear 333 to rotate via the rotating shaft 332. The active bevel gear 333 meshes with the driven bevel gear 334, thereby driving the threaded rod 32 to rotate. This transmission method can achieve synchronous rotation of the threaded rods 32 on both sides, so that the filter mechanism 2 remains stable during lifting and lowering, avoiding tilting or jamming caused by uneven force on both sides. At the same time, the support base 335 provides good support and fixation for the rotating shaft 332, enhances the stability of the transmission structure, and reduces vibration and noise during transmission.

[0026] It should be noted that the support base 335 is made of HT200 cast iron and is internally fitted with a 6205 deep groove ball bearing (inner diameter 25mm, outer diameter 52mm). Dust covers are provided on both sides of the bearing. The support base is fixed to the gantry frame 31 by M8 bolts. The shaft diameter tolerance at the mating point between the rotating shaft 332 and the bearing is h6 to ensure the interference fit accuracy.

[0027] In an optional embodiment: the lifting mechanism 3 further includes a limiting groove 35. The gantry 31 has a limiting groove 35 on one side of each of the two sets of threaded rods 32. A limiting slider 36 is slidably installed inside each of the two sets of limiting grooves 35. One side of each of the two sets of limiting sliders 36 is fixedly connected to one side of each of the two sets of sliding blocks 34.

[0028] It should be noted that the limiting slide 35 is milled from a 20mm thick steel plate, with a width of 40mm and a depth of 30mm. It is internally inlaid with a wear-resistant copper sliding plate (5mm thick). The clearance between the slider and the slide 35 is ≤0.5mm. Buffer rubber pads (Shore 60A hardness) are installed at both the top and bottom of the slide 35 to prevent the filter mechanism 3 from impacting the gantry frame 31 when it is raised or lowered to its final position. The combined use of the limiting slide 35 and the limiting slider 36 effectively limits the movement range of the sliding block 34, preventing it from disengaging from the threaded rod 32. This provides double safety assurance for the raising and lowering of the filter mechanism 2, ensuring the stable operation of the equipment. In an optional embodiment: a insertion groove 24 is provided on the top of the side wall of one end of the filter frame 21, the bottom of the waste discharge baffle 25 is inserted into the insertion groove 24, and the top is bolted to the top surface of the filter frame 21 by bolts.

[0029] It should be noted that the bottom of the insertion slot 24 extends to the bottom surface of the reserved space inside the filter frame 21. The bolts are M8 stainless steel bolts, and flat washers and spring washers are installed in the bolt holes to prevent loosening due to vibration. The waste discharge baffle 25 is made of 304 stainless steel plate (3mm thick).

[0030] In an optional embodiment, a drain pipe 4 and a solenoid valve 5 are also included. The drain pipe 4 is installed through the bottom of one side of the sedimentation tank 1, and the solenoid valve 5 is fixedly installed on the outer wall of the drain pipe 4.

[0031] It should be noted that the drain pipe 4 is made of DN100 UPVC pipe with a wall thickness of 8.6mm and a pressure bearing capacity of ≥0.6MPa. A steel flange sleeve (inner diameter 110mm) is installed at the point where it passes through the sedimentation tank 1. Waterproof sealant is filled between the sleeve and the pipe. The solenoid valve 5 is a ZCS-100 normally closed solenoid valve made of 304 stainless steel with a nominal pressure of 1.0MPa, a power supply voltage of AC220V±10%, and a protection level of IP65. It is matched with a flange (PN10) to connect to the drain pipe.

[0032] In an optional embodiment, two sets of protective covers 6 are also included, both sets of protective covers 6 being bolted to both sides of the gantry frame 31.

[0033] It should be noted that the protective cover 6 can effectively prevent external dust, rainwater, debris and other objects from entering the top cavity inside the gantry frame 31, reducing the impact on the drive assembly 33 and the normal operation of the transmission components.

[0034] Working principle: When this utility model is in use, the initial position of the filter mechanism 2 is inside the sedimentation tank 1. The filter frame 21 at the bottom is in contact with the bottom surface of the sedimentation tank 1. After the sewage enters from the top of the sedimentation tank 1, it first flows through the filter frame 21 at the top of the filter mechanism 2. During the flow of sewage, larger particles of impurities such as leaves, plastic fragments, and stones are intercepted by the side filter screen 22 and bottom filter screen 23 inside the top filter frame 21; smaller particles of impurities such as fine sand, fibers, and algae continue to fall and are further intercepted by the side filter screen 22 and bottom filter screen 23 inside the bottom filter frame 21. After double filtration, most of the solid impurities in the sewage are removed, and preliminary solid-liquid separation is achieved. Flocculant is added as the sewage enters the sedimentation tank 1, allowing it to react with the urban sewage and settle. When the impurities accumulated in the two sets of filter frames 21 reach a certain amount and affect the filtration effect, the filter mechanism 2 needs to be cleaned. At this time, the lifting mechanism 3 is activated, and the drive component 33 of the lifting mechanism 3 starts to work. The dual-axis motor 331 drives the active bevel gear 333 to rotate through the rotating shaft 332. The active bevel gear 333 meshes with the driven bevel gear 334, thereby driving the threaded rod 32 to rotate. Since the sliding block 34 is threadedly connected to the threaded rod 32, and the rotational freedom of the sliding block 34 is restricted by the cooperation of the limiting slide groove 35 and the limiting slider 36, the rotation of the threaded rod 32 will drive the sliding block 34 to move upward along the threaded rod 32. The sliding block 34 is connected to the top filter frame 21 by bolts, thereby driving the entire filter mechanism 2 to rise. The filter mechanism 2 first rises to a certain height, so that the top filter frame 21 is exposed in the sedimentation tank 1. The staff can clean the larger impurities intercepted in the top filter frame 21. After cleaning, the lifting mechanism 3 is started again to continue to lift the filter mechanism 2 until the bottom filter frame 21 is also exposed in the sedimentation tank 1. At this time, the small impurities in the bottom filter frame 21 are cleaned. After cleaning, the filter mechanism 2 is lowered back into the sedimentation tank 1 through the lifting mechanism 3 to continue the sewage filtration work. When the filtration mechanism 2 rises for cleaning, the wastewater in the sedimentation tank 1 is flushed out by the flocculated impurities and driven to rise by the side filter screen 22 and bottom filter screen 23 inside the bottom filter frame 21 of the filtration mechanism 2. The filtered water is then discharged from the sedimentation tank 1 through the discharge pipe 4 controlled by the solenoid valve 5 to enter the next treatment stage. After that, the solenoid valve 5 is closed, and the system waits for the next wastewater purification treatment.

[0035] The control method of the drive motor and solenoid valve in this application is automatic control by a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming, which is common knowledge in the field. Furthermore, this application is mainly used to protect the structure, shape and their combination, so the control method and circuit connection will not be explained in detail in this application.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A purification sedimentation tank for urban wastewater treatment, characterized in that, Including the sedimentation tank (1); The filtration mechanism (2) is installed inside the sedimentation tank (1) and is used to filter impurities in the wastewater; The lifting mechanism (3) is installed on the top of the sedimentation tank (1) and is used to drive the filter mechanism (2) to rise above the sedimentation tank (1) for cleaning and to descend into the sedimentation tank (1) to filter the sewage. The filtering mechanism (2) includes two sets of filter frames (21). The two sets of filter frames (21) are fixedly installed on the top and bottom of the bracket. The top filter frame (21) is connected to the lifting mechanism (3). Side filter screens (22) are fixedly installed inside the side walls of both sides of the filter frame (21). Bottom filter screen (23) is fixedly installed at the bottom of the filter frame (21). A waste discharge baffle (25) is detachably installed inside the side wall of one end of the filter frame (21).

2. The purification sedimentation tank for urban sewage treatment according to claim 1, characterized in that: The lifting mechanism (3) includes a gantry frame (31), which is fixedly installed on the bottom outer side of the side walls of the sedimentation tank (1). Threaded rods (32) are rotatably installed on both sides of the gantry frame (31) through bearings. The top outer walls of the two sets of threaded rods (32) are connected to a drive assembly (33), and sliding blocks (34) are threadedly installed on the outer walls of the threaded rods (32). The bottoms of the two sets of sliding blocks (34) are fixedly installed on the top sides of the top filter frame (21) by bolts.

3. A purification sedimentation tank for urban sewage treatment according to claim 2, characterized in that: The drive assembly (33) includes a dual-axis motor (331). The dual-axis motor (331) is fixedly mounted on the surface of the top cavity of the gantry frame (31) via a motor mount. One end of each of the two output shafts of the dual-axis motor (331) is fixedly mounted with a rotating shaft (332) via a coupling. The outer walls of the opposite ends of the two sets of rotating shafts (332) are fixedly fitted with driving bevel gears (333). One side of each set of driving bevel gears (333) is meshed with a driven bevel gear (334). The two sets of driven bevel gears (334) are respectively fixedly fitted on the outer walls of the two sets of threaded rods (32).

4. A purification sedimentation tank for urban sewage treatment according to claim 3, characterized in that: The drive assembly (33) also includes two sets of support seats (335). The two sets of support seats (335) are respectively fixedly installed on the surface of the top cavity of the gantry frame (31). Each set of support seats (335) is equipped with a bearing. The rotating shaft (332) is rotatably connected to the support seat (335) through the bearing.

5. A purification sedimentation tank for urban sewage treatment according to claim 2, characterized in that: The lifting mechanism (3) also includes a limiting groove (35). The gantry frame (31) is provided with a limiting groove (35) on one side of the two sets of threaded rods (32). A limiting slider (36) is slidably installed inside the two sets of limiting grooves (35). One side of the two sets of limiting sliders (36) is fixedly connected to one side of the two sets of sliding blocks (34).

6. A purification sedimentation tank for urban sewage treatment according to claim 1, characterized in that: The filter frame (21) has a slot (24) on the top of one side wall. The bottom of the waste discharge baffle (25) is inserted into the slot (24), and the top is bolted to the top surface of the filter frame (21) by bolts.

7. A purification sedimentation tank for urban wastewater treatment according to claim 1, characterized in that: It also includes a drain pipe (4) and a solenoid valve (5). The drain pipe (4) is installed through the bottom of one side of the sedimentation tank (1), and the solenoid valve (5) is fixedly installed on the outer wall of the drain pipe (4).

8. A purification sedimentation tank for urban sewage treatment according to claim 2, characterized in that: It also includes two sets of protective covers (6), both sets of protective covers (6) are fixedly installed on both sides of the gantry frame (31) by bolts.

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