Sewage filtering system and cleaning and sewage suction truck

Abstract

The utility model relates to the technical field of cleaning and sewage suction trucks for environmental sanitation cleaning, in particular to a sewage filtering system and a cleaning and sewage suction truck. The system comprises a sewage tank, wherein the sewage tank comprises a tank door; the primary filtering device is arranged in the sewage tank and comprises a buoy hinged to the sewage tank, a driving mechanism fixedly connected with the buoy and a first filtering net barrel in transmission connection with the first driving mechanism, and the first driving mechanism is used for driving the first filtering net barrel to rotate; the clean water tank is communicated with a first water pump, and the first water pump is communicated with the interior of the first filter screen barrel. The buoy is hinged to the sewage tank and floats according to the liquid level in the tank to drive the first filter screen barrel to float, and the problems that a sewage filtering inlet of an existing sewage filtering system is fixedly arranged too high and cannot filter sewage, and the sewage filtering inlet is arranged too low and is easily blocked by impurities can be solved.

Description

Technical Field

[0001] This utility model relates to the technical field of cleaning and vacuuming vehicles for sanitation and cleaning, specifically to a sewage filtration system and a cleaning and vacuuming vehicle. Background Technology

[0002] As a type of sanitation vehicle, the sewer cleaning and vacuum truck is an important piece of equipment for urban environmental protection and construction, capable of flushing sewers, pumping out sludge, and ensuring timely dredging of sewers. Conventional vacuum trucks lack sewage filtration systems, requiring frequent trips to water stations to refill their water tanks, resulting in low efficiency. While some cleaning and vacuum trucks have sewage filtration systems in their tanks, the filtration inlet is often fixed to the top of the tank. Since there are many impurities at the bottom of the sewage tank, if the filtration inlet is set too high, filtration will fail when the liquid level in the tank is low; conversely, if the filtration inlet is set too low, it is easily clogged by heavier impurities in the sewage, making it inconvenient and impractical. Utility Model Content

[0003] The main purpose of this utility model is to solve the problem of inconvenience caused by the fixed setting of the sewage filtration inlet in the existing sewage filtration system, and to provide a sewage filtration system and a cleaning and vacuuming vehicle.

[0004] The technical solution adopted in this utility model is: a wastewater filtration system, which includes,

[0005] A wastewater tank, the wastewater tank including a tank door;

[0006] A primary filtration device is provided inside the sewage tank and includes a float hinged to the sewage tank, a drive mechanism fixed to the float, and a first filter screen barrel that is pulverizedly connected to the first drive mechanism. The first drive mechanism is used to drive the first filter screen barrel to rotate.

[0007] A clean water tank is connected to a first water pump, which is connected to a first filter screen barrel.

[0008] Furthermore, the sewage tank and the clean water tank are integrated into the same dual-chamber tank body, and a sealing partition is slidably provided inside the dual-chamber tank body. The sealing partition divides the dual-chamber tank body into two chambers, which are used as sewage tank and clean water tank respectively.

[0009] Furthermore, the primary filtration device also includes a rinsing mechanism for rinsing the inner wall of the first filter screen barrel; the rinsing mechanism includes a rinsing pipe disposed inside the first filter screen barrel; the rinsing pipe is provided with rinsing holes.

[0010] Furthermore, it also includes a limiting mechanism, which is located on the primary filtration device and is used to abut against the sewage tank to limit the rotation angle of the float when the float rotates around the hinge.

[0011] Furthermore, the limiting mechanism includes limiting support rods, which are respectively disposed on the upper and lower sides of the float and are used to abut against the sewage tank to limit the rotation angle of the float when the float rotates around the hinge.

[0012] Furthermore, it also includes a buffer mechanism, which includes a tension spring that is fixed to the top of the sewage tank and the bottom of the float; the tank door is provided with an installation pipe, one end of which is connected to the first water pump and the other end is rotatably provided with a transfer pipe, the float is hinged to the installation pipe, and the transfer pipe is connected to the inside of the first filter screen barrel.

[0013] Furthermore, it also includes a secondary filtration device located on the output pipeline of the primary filtration device. The secondary filtration device includes a hydrocyclone separator with its top and bottom ends connected to the clean water tank and the wastewater tank, respectively. The inlet pipeline of the hydrocyclone separator is connected to the first filter screen bucket, which is used to form a spiral water flow to discharge heavier impurities into the wastewater tank and discharge the upper water into the clean water tank.

[0014] Furthermore, the cyclone separator includes an inlet pipe and a conical pipe with a large top and a small bottom. The inlet pipe is connected to and tangent to the wall of the large end of the conical pipe to form a cyclone. The top and bottom ends of the conical pipe are respectively connected to a clean water tank and a wastewater tank. The outlet of the conical pipe connected to the clean water tank is lower than that of the inlet pipe.

[0015] Furthermore, the top pipe of the conical tube is equipped with a water outlet pipe, one end of which is connected to the clean water tank, and the other end is inserted into the conical tube below the water inlet pipe.

[0016] Furthermore, the conical tube includes a large-head conical tube, a small-head conical tube detachably mounted on the large-head conical tube, and a cap mounted on the large-head end of the large-head conical tube; the cap is provided with the inlet pipe and the outlet pipe.

[0017] Furthermore, it also includes a three-stage filtration device installed in the water tank. The three-stage filtration device includes a mounting frame and a second filter screen barrel rotatably mounted on the mounting frame, a second water pump connected to the second filter screen barrel by a pipeline, and a second drive mechanism that is driven to rotate the second filter screen barrel.

[0018] Furthermore, a scraper is fixed on the mounting frame to scrape off impurities adhering to the outer wall of the second filter screen barrel; the mounting frame is also equipped with a spray pipe with a water spray nozzle for rinsing the outer wall of the second filter screen barrel; the second filter screen barrel is connected to the outside of the clean water tank through a connecting pipe.

[0019] Furthermore, it also includes a four-stage filtration device with the inlet connected to the second filter screen barrel; the four-stage filtration device includes a storage tank connected to the second filter screen barrel, a third filter screen barrel disposed in the storage tank, an outlet disposed on the storage tank and connected to the third filter screen barrel, and a second water pump disposed on the outlet of the third filter screen barrel for discharging the water filtered by the third filter screen barrel.

[0020] In another aspect, this utility model provides a cleaning and vacuuming vehicle, including a sewage filtration system provided by this utility model, a vacuum pump installed on a sewage tank, and a roller assembly connected to the first filter screen barrel; the roller assembly includes a reel and a hose installed on the reel.

[0021] The beneficial effects of this utility model include: 1. The float is hinged to the sewage tank and can rotate around the hinge. When the liquid level in the sewage tank changes, the float drives the first filter screen barrel to float. The first drive mechanism drives the first filter screen barrel to rotate, which makes the first filter screen barrel less likely to be blocked by heavy impurities at the bottom. The first water pump pipeline is connected to the first filter screen barrel, which can pump the filtered first water into the clean water tank for use. When there are many impurities in the sewage tank, the tank door can be opened to clean the impurities. The first filter screen barrel can rotate and float with the float, which can solve the problem of the inconvenience caused by the fixed setting of the conventional sewage filter inlet.

[0022] 2. The clean water tank and the wastewater tank of this utility model are integrated into the same tank body and separated by a sealing partition. The volume of the clean water tank and the wastewater tank can be adjusted by sliding the sealing partition, which is convenient for taking water before operation and storing clean water, and can increase the maximum volume of the clean water tank.

[0023] 3. The rinsing mechanism of this utility model has a simple structure. The rinsing pipe and its rinsing holes can rinse the cylinder wall of the first filter screen barrel, avoiding impurities from clogging the filter screen holes of the first filter screen barrel.

[0024] 4. The limiting mechanism can limit the angle of rotation of the float around the hinge, which can prevent the primary filtration device from being damaged by falling onto the sewage tank due to a sudden drop in liquid level when the tank door is opened;

[0025] 5. The buffer mechanism can slow down the speed at which the float and filter screen barrel rotate and fall around the hinge, preventing them from hitting the sewage tank; the primary filter device is hinged to the tank door through the installation pipe and moves with the tank door when the tank door is opened, making it convenient to clean the impurities in the sewage tank after opening the tank door.

[0026] 6. Secondary filtration can be performed through a two-stage filtration device. The spiral water flow formed by the hydrocyclone separator discharges the heavier impurities in the lower layer into the wastewater tank and discharges the upper water into the clean water tank, further improving the filtration effect and forming a circulating filtration.

[0027] 7. The hydrocyclone separator of this utility model has a simple structure. The water inlet pipe is connected to the conical pipe and is tangent to the wall of the conical pipe, so that the water flow enters the conical pipe to form a spiral water flow. The heavier impurities in the water are discharged into the sewage tank for circulation filtration at the bottom, and the clear water at the top can be discharged into the clear water tank for later use.

[0028] 8. The three-stage filtration device can perform three filtrations, further improving the filtration effect of wastewater;

[0029] 9. The scraper can remove impurities attached to the outside of the second filter screen barrel; the spray pipe can wash the second filter screen barrel and unclog the filter screen holes.

[0030] 10. The cleaning and sewage suction truck of this utility model can use the clean water stored in the clean water tank to flush and unclog the sewer, and use the sewage suction pump to suck up the sewage from the sewer, and then filter it through the sewage filtration system for recycling. This can improve the water utilization rate, avoid the need to go back and forth to the water station to refill the water after the water stored in the clean water tank is used up, thus saving time and improving work efficiency.

[0031] The wastewater filtration system disclosed in this utility model uses a float hinged to a wastewater tank. The float moves according to the liquid level in the tank, causing the first filter screen to float. This solves the problems of existing wastewater filtration systems where the wastewater filter inlet is fixed too high and cannot filter wastewater, or set too low and easily clogged by impurities. The first drive mechanism drives the first filter screen to rotate, which can effectively prevent the filter screen holes of the first filter screen from clogging. The overall structure is simple, easy to use, and has great promotional value. Attached Figure Description

[0032] Figure 1 : A simplified structural diagram of a wastewater filtration system;

[0033] Figure 2 A simplified schematic diagram of the primary filtration unit;

[0034] Figure 3 : A schematic diagram of the primary filtration unit installed on the tank door;

[0035] Figure 4 : A simplified structural diagram of a two-stage filtration device;

[0036] Figure 5 : Schematic diagram of the exploded structure of a tapered tube;

[0037] Figure 6 A simplified schematic diagram of a three-stage filtration system;

[0038] Figure 7 A simplified schematic diagram of a four-stage filtration system;

[0039] Wherein: 1—Double-chamber tank; 11—Sewage tank; 12—Clear water tank; 13—Sealing partition; 14—Tank door; 2—First-stage filtration device; 21—Float; 22—First drive mechanism; 23—First filter screen barrel; 24—Flush pipe; 25—Limiting mechanism; 26—Tension spring; 27—Installation pipe; 28—First water pump; 29—Transfer pipe; 3—Second-stage filtration device; 31—Conical tube; 311—Large-end conical tube; 312—Small-end conical tube; 313—Cap; 32—Inlet pipe; 4—Third-stage filtration device; 41—Second filter screen barrel; 42—Second drive mechanism; 43—Scraper; 44—Spray pipe; 45—Mounting frame; 5—Fourth-stage filtration device; 51—Storage tank; 52—Third filter screen barrel; 6—Second water pump; 7—Roller assembly; 8—Three-way valve; 9—Safety valve. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary. The drawings are not drawn to scale and are intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] This utility model relates to a wastewater filtration system that can be used on sanitation cleaning vacuum trucks to filter and reuse pumped wastewater, improving work efficiency and saving water resources. In existing wastewater filtration systems for cleaning vacuum trucks, the wastewater filter inlet is fixedly located on the wastewater tank 11. This high inlet prevents filtration when the liquid level is low, and when it's too low, it's easily clogged by heavier impurities in the wastewater, making it inconvenient to use. The wastewater filtration system of this utility model uses a float 21 hinged to the wastewater tank 11. The float moves according to the liquid level in the tank, causing the first filter screen barrel 23 to float. This solves the problems of existing wastewater filtration systems where the filter inlet is fixed too high, preventing filtration, or too low, causing clogging. A first drive mechanism 22 rotates the first filter screen barrel 23, effectively preventing clogging of the filter screen. The overall structure is simple, easy to use, and has significant promotional value.

[0045] A wastewater filtration system, specifically, such as Figure 1-6 As shown, the system includes a wastewater tank 11, a primary filtration device 2, and a clean water tank 12. The wastewater tank 11 includes a tank door 14, which is hinged to the wastewater tank 11. The primary filtration device 2 is located inside the wastewater tank 11 and includes a float 21 hinged to the wastewater tank 11, a first drive mechanism 22 fixed to the float 21, and a first filter screen barrel 23 driven by the first drive mechanism 22. The first drive mechanism 22 drives the first filter screen barrel 23 to rotate. The clean water tank 12 is connected to a first water pump 28, whose pipeline is connected to the first filter screen barrel 23, for pumping the filtered water from the first filter screen barrel 23 into the clean water tank 12. The first drive mechanism 22 uses a hydraulic motor to drive the first filter screen barrel 23 to rotate around its own axis. The hydraulic motor can be used in harsh environments. Alternatively, an electric motor can also be used as the first drive mechanism 22. During filtration, the float 21 floats on the liquid surface, causing the first filter screen barrel 23 to be located on the liquid surface, filtering out the sewage with fewer impurities in the upper layer of sewage. The first drive mechanism 22 drives the first filter screen barrel 23 to rotate, which can effectively reduce the clogging of the filter holes of the first filter screen barrel 23 by impurities.

[0046] In a preferred embodiment, such as Figure 1As shown, the sewage tank 11 and the clean water tank 12 are integrated into the same double-chamber tank 1. A sealing partition 13 is slidably installed inside the double-chamber tank 1, dividing the double-chamber tank 1 into two chambers, which are used as the sewage tank 11 and the clean water tank 12, respectively. That is, the two chambers of the double-chamber tank 1 serve as the inner chambers of the sewage tank 11 and the clean water tank 12, respectively. The sealing partition 13 can be slidably adjusted by using an air pump to regulate the air pressure inside the clean water tank 12 and / or the sewage tank 11, or it can be moved by a hydraulic telescopic cylinder or other driving device. The double-chamber tank 1 is separated by the sealing partition 13, and the sliding sealing partition 13 can adjust the volume of the clean water tank 12 and the sewage tank 11, which is convenient for increasing the maximum volume of the clean water tank 12 when storing clean water at the water filling station before operation; it also saves space on the cleaning and vacuuming truck.

[0047] In a preferred embodiment, such as Figure 2-3 As shown, the primary filtration device 2 also includes a rinsing mechanism for rinsing the inner wall of the first filter screen barrel 23; the rinsing mechanism includes a rinsing pipe 24 disposed within the first filter screen barrel 23; the rinsing pipe 24 is provided with rinsing holes; and the rinsing holes are provided with nozzles. Furthermore, the rinsing pipe 24 can also be disposed on the outside of the first filter screen barrel 23 to rinse the outer wall of the first filter screen barrel 23. The rinsing mechanism of this invention has a simple structure, and the rinsing pipe 24 and its rinsing holes can rinse the barrel wall of the first filter screen barrel 23, preventing impurities from clogging the filter screen openings of the first filter screen barrel 23.

[0048] In one embodiment, such as Figure 2-3 As shown, this wastewater filtration system also includes a limiting mechanism 25, which is mounted on the primary filtration device 2. The limiting mechanism 25 is used to abut against the wastewater tank 11 and limit the rotation angle of the float 21 when it rotates around the hinge. Preferably, the limiting mechanism 25 includes limiting rods, which are respectively located on the upper and lower sides of the float 21. These limiting rods abut against the wastewater tank 11 and limit the rotation angle of the float 21 when it rotates around the hinge. When the liquid level in the wastewater tank 11 is too high, the float 21 abuts against the tank body of the wastewater tank 11 via the upper limiting rod, limiting the rotation of the float 21. When the liquid level in the wastewater tank 11 is too low, the float 21 abuts against the tank body of the wastewater tank 11 via the lower limiting rod, limiting the rotation of the float 21. This prevents damage to the primary filtration device 2 caused by a sudden drop in liquid level when the tank door 14 is opened.

[0049] In a further embodiment, such as Figure 2 As shown, the primary filtration device 2 also includes a buffer mechanism, which includes a tension spring 26. The top end of the tension spring 26 is fixed to the sewage tank 11, and the bottom end is fixed to the float 21. The tension spring 26 can slow down the speed at which the float 21 and the filter screen barrel rotate and fall around the hinge, so as to prevent them from falling onto the sewage tank 11.

[0050] To facilitate opening the tank door 14 to clean impurities inside the wastewater tank 11 and to prevent the primary filtration mechanism from obstructing cleaning, such as... Figure 3 As shown, the primary filtration device 2 is mounted on the tank door 14. The tank door 14 has an installation pipe 27. One end of the installation pipe 27 is connected to the first water pump 28, and the other end is rotatably connected to a transfer pipe 29. The transfer pipe 29 is sealed to the installation pipe 27 and can be L-shaped. A float 21 is hinged to the installation pipe 27. The transfer pipe 29 connects to the inside of the first filter screen barrel 23. The first water pump 28 draws filtered water from the first filter screen barrel 23 into the clean water tank 12 through the installation pipe 27. The transfer pipe 29 and the installation pipe 27 can be rotatably and sealed using a bushing and a nylon sleeve. The bushing is fitted inside the installation pipe 27, and the nylon sleeve is fitted outside the transfer pipe 29 and inside the bushing to achieve a sealed connection. The primary filtration device 2 is hinged to the tank door 14 through the installation pipe 27 and moves with the tank door 14 when the tank door 14 is opened, facilitating the cleaning of impurities in the wastewater tank 11 after opening the tank door 14.

[0051] In some embodiments, such as Figure 1 As shown, this wastewater filtration system also includes a secondary filtration device 3, which is located on the output pipe of the primary filtration device 2. The secondary filtration device 3 includes a cyclone separator with two outlets at the top and bottom. The top outlet pipe connects to the clean water tank 12, and the bottom outlet pipe connects to the wastewater tank 11. The cyclone separator also has a side inlet pipe connected to the first filter screen 23, which forms a spiral water flow to discharge heavier impurities into the wastewater tank 11 and the upper water into the clean water tank 12, thus performing secondary filtration on the water filtered by the first filter screen 23. The spiral water flow formed by the cyclone separator discharges the heavier impurities at the bottom into the wastewater tank 11 and the upper water into the clean water tank 12, further improving the filtration effect and forming a circulating filtration.

[0052] This wastewater filtration system also includes a secondary filtration device 3, such as... Figure 4As shown, the cyclone separator includes an inlet pipe 32 and a conical tube 31 with a larger top and a smaller bottom. The inlet pipe 32 is connected to the side wall of the larger end of the conical tube 31 and is tangential to the wall of the larger end to form a cyclone. The top and bottom ends of the conical tube 31 are respectively connected to a clean water tank 12 and a wastewater tank 11. The outlet of the conical tube 31 connecting to the clean water tank 12 is lower than the inlet pipe 32. Preferably, the secondary filtration device 3 includes multiple cyclone separators. The top end of the conical tube 31 is provided with an outlet pipe. One end of the outlet pipe is connected to the clean water tank 12, and the other end is inserted into the conical tube 31 and located below the inlet pipe 32, to prevent the water injected into the inlet pipe 32 from flowing into the clean water tank 12 through the outlet pipe without being centrifugally filtered by the spiral. The hydrocyclone separator has a simple structure. The inlet pipe 32 is connected to the conical pipe 31 and is tangent to the wall of the conical pipe 31, so that the water flow enters the conical pipe 31 to form a spiral water flow. The heavier impurities in the water are discharged into the sewage tank 11 for circulation filtration, and the upper clear water can be discharged into the clear water tank 12 for later use.

[0053] Based on the cyclone separator including the tapered tube 31, such as Figure 5 As shown, the conical tube 31 includes a large-end conical tube 311, a small-end conical tube 312 detachably mounted on the large-end conical tube 311, and a cap 313 located at the large end of the large-end conical tube 311. The cap 313 is provided with the aforementioned water outlet pipe. The water inlet pipe is tangentially connected to the circumferential side of the cap 13. The large-end conical tube 311 and the small-end conical tube 312 can be detachably and securely connected via a connector, facilitating the removal of the small-end conical tube 312 for cleaning impurities.

[0054] In some embodiments, such as Figure 1 and Figure 6 As shown, this wastewater filtration system also includes a tertiary filtration device 4, which is located inside the clear water tank 12. The tertiary filtration device 4 includes a mounting frame 45, a second filter screen barrel 41 rotatably mounted on the mounting frame 45, a second water pump 6 connected to the second filter screen barrel 41 via a pipeline, and a second drive mechanism 42 driven by the second filter screen barrel 41. The second drive mechanism 42 is used to drive the second filter screen barrel 41 to rotate; preferably, the second drive mechanism 42 is a hydraulic motor. After filtration by the primary filtration device 2 and / or the secondary filtration device 3, the impurities in the wastewater are relatively few. The tertiary filtration device 4 can be located at the bottom of the clear water tank 12. The wastewater can be filtered again through the tertiary filtration device 4, further improving the filtration effect.

[0055] This wastewater filtration system also includes a three-stage filtration device 4, such as... Figure 6As shown, the three-stage filtration system also includes a scraper 43, which is fixed on the mounting frame 45 and used to scrape off impurities adhering to the outer wall of the second filter barrel 41. Preferably, the mounting frame 45 is also provided with a spray pipe 44, which has a water spray nozzle for rinsing the outer wall of the second filter barrel 41. The second filter barrel 41 is connected to the outside of the clean water tank 12 through a connecting pipe for use. Preferably, the filter mesh size of the first filter barrel 23 and the second filter barrel 41 decreases sequentially. The scraper 43 can remove impurities adhering to the outside of the second filter barrel 41; the spray pipe 44 can rinse the second filter barrel 41 and unclog the filter mesh size of the second filter barrel 41.

[0056] This wastewater filtration system also includes a three-stage filtration device 4, such as... Figure 1 and Figure 7 As shown, this wastewater filtration system also includes a four-stage filtration device 5. The inlet pipe of the four-stage filtration device 5 is connected to the second filter screen barrel 41. The four-stage filtration device 5 includes a storage tank 51 connected to the second filter screen barrel 41, a third filter screen barrel 52 located in the storage tank 51, and an outlet on the storage tank 51 connected to the third filter screen barrel 52. A second water pump 6 is located at the outlet of the third filter screen barrel 52 and is used to discharge the water filtered by the third filter screen barrel 52 for direct use. Preferably, the filter mesh size of the second filter screen barrel 41 and the third filter screen barrel 52 decreases sequentially.

[0057] Another aspect of this utility model provides a cleaning and vacuuming truck, including a sewage filtration system provided by this utility model, a vacuum pump mounted on a sewage tank 11, and a reel assembly 7 connected to the first filter screen barrel 23; the reel assembly 7 includes a reel and a flexible hose mounted on the reel. When a multi-stage filtration device is provided, the flexible hose connects to the filter device at the end. For example, if the sewage filtration system has four stages of filtration, the flexible hose connects to the connecting pipe of the fourth-stage filter device 5. The cleaning and vacuuming truck of this utility model can use clean water stored in the clean water tank 12 to flush and unclog sewers, and use the vacuum pump to suck up sewage from the sewers. After filtration by the sewage filtration system, the sewage is recycled, which can improve water utilization and avoid the need to go back and forth to the water station to refill the water after the water stored in the clean water tank 12 is used up, thus improving work efficiency.

[0058] In a preferred embodiment, such as Figure 1As shown, multiple drum assemblies 7 are provided, connected to the outlet of the second water pump 6 via a three-way pipe. Valves and water pumps can be added to each pipeline of this invention. In one specific embodiment, two drum assemblies 7 are provided, one for unclogging sewers and the other for washing vehicle bodies; the second water pump 6 is equipped with a safety valve 9, which is connected to the two drum assemblies 7 via a three-way valve 8. A safety valve 9 is also installed between one of the drum assemblies 7 and the three-way valve 8, and this safety valve 9 is connected to one drum assembly 7 and the clean water tank 12 via the three-way valve 8 respectively. Preferably, the clean water tank 12 is provided with a slag discharge port for discharging a small amount of impurities by rinsing the clean water tank 12.

[0059] In actual use, water is first added to the water supply station and stored in the clean water tank 12. After flushing the sewers, sewage is pumped into the sewage tank 11 according to the operation. The float 21 floats on the liquid surface, causing the first filter screen 23 to be located on the upper layer of sewage. The first drive mechanism 22 drives the first filter screen 23 to rotate, which can effectively reduce impurities adhering to the first filter screen 23. The first water pump 28 draws the water in the first filter screen 23 to the hydrocyclone separator for secondary filtration. Impurities flow back to the sewage tank 11 for circulation filtration under the centrifugal force and gravity of the hydrocyclone separator. The water on the upper layer of the hydrocyclone separator is discharged into the clean water tank 12 and filtered three times by the three-stage filtration device 4. The second drive mechanism 42 drives the second filter screen 41 to rotate, and at the same time, the scraper 43 removes the small amount of impurities adhering to the second filter screen 41. The water filtered by the second filter screen 41 is filtered by the third filter screen 52 and then pumped into the hose of the reel assembly 7 by the second water pump 6 for use.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sewage filtration system characterized by: The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively. The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively. The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively. The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively.

2. A sewage filtration system as claimed in claim 1, wherein: The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively.

3. A sewage filtration system as claimed in claim 1, wherein: The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively.

4. A sewage filtration system as claimed in claim 1, wherein: The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively.

5. A sewage filtration system as claimed in claim 4, wherein: The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively.

6. A sewage filtration system as claimed in any one of claims 1 to 5 wherein: The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively.

7. A sewage filtration system as claimed in claim 6, characterised in that: The utility model relates to a sewage tank (11) and clean water tank (12) integrated in the same double-cavity tank body (1), the double-cavity tank body (1) is slidably provided with a sealing partition plate (13), and the sealing partition plate (13) divides the double-cavity tank body (1) into two cavities for use as the sewage tank (11) and the clean water tank (12) respectively.

8. A sewage filtration system as claimed in any one of claims 1 to 5 wherein: The third filter device (4) is arranged in the clean water tank (12), and comprises a mounting frame (45), a second filter mesh barrel (41) rotatably arranged on the mounting frame (45), a second water pump (6) connected with the second filter mesh barrel (41) through a pipeline, and a second driving mechanism (42) in driving connection with the second filter mesh barrel (41), and the second driving mechanism (42) is used for driving the second filter mesh barrel (41) to rotate.

9. A sewage filtration system as claimed in claim 8, characterised in that: A scraper (43) is fixedly arranged on the mounting frame (45) and used for scraping off impurities adhered to the outer wall of the second filter mesh barrel (41); a spray pipe (44) is further arranged on the mounting frame (45), the spray pipe (44) is provided with a water spraying opening and used for flushing the outer wall of the second filter mesh barrel (41); and the second filter mesh barrel (41) is communicated to the outside of the clean water tank (12) through a connecting pipe.

10. A cleaning vehicle, characterized by: The sewage filtering system comprises the sewage filtering system according to any one of claims 1-9, a sewage suction pump arranged on the sewage tank (11), and a winding drum assembly (7) communicated in the first filter mesh barrel (23); the winding drum assembly (7) comprises a winding drum and a hose arranged on the winding drum.

Images