Automatic cleaning structure of sewage filtering device

Abstract

The present application belongs to sewage treatment technical field, specifically speaking, it is a kind of sewage filtering device automatic cleaning structure, including: filter box, for the filtration of sewage, side is provided with support frame, top surface exists opening;Liquid inlet pipe, through installation in the side of filter box, for the delivery of sewage in filter box;Liquid outlet pipe, based on the symmetry of filter box center is installed on filter box;Reserved cylinder;A kind of sewage filtering device automatic cleaning structure described in the application, by setting reserved cylinder on liquid inlet pipe, when cleaning the filter of filter screen, liquid inlet pipe outlet is blocked, sewage in liquid inlet pipe first enters into reserved cylinder, then by scraper and push plate cooperation to clean filter, then each telescopic rod resets, and the filtration of sewage continues;The whole cleaning process, without suspending the delivery process of sewage in liquid inlet pipe, simplifies the cleaning procedure, avoids the suspension flow of sewage in liquid inlet pipe to affect the efficiency of sewage treatment;Improve the efficiency of sewage treatment.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically an automatic cleaning structure for a wastewater filtration device. Background Technology

[0002] Wastewater treatment begins by filtering out large impurities or floating matter. This filtration typically involves using filter screens, which are installed in filter boxes. After a period of use, the large impurities or floating matter filtered out by the filter screens need to be removed to ensure that the mesh remains clear and maintain stable wastewater treatment efficiency.

[0003] Currently, when cleaning impurities or floating objects from the filter screen boiler, the sewage delivery needs to be stopped. Then, the debris or floating objects are manually lifted out of the filter box using tools such as tongs. The whole process takes a certain amount of time, the sewage delivery is suspended, and the whole procedure is quite cumbersome, affecting the sewage treatment speed. Therefore, the sewage treatment efficiency needs to be further improved.

[0004] Therefore, the present invention provides an automatic cleaning structure for a wastewater filtration device. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this invention to solve its technical problem is: an automatic cleaning structure for a sewage filtration device, comprising:

[0007] The filter box is used to filter sewage. It has a support frame on the side and an opening on the top.

[0008] An inlet pipe is installed through the side of the filter box for conveying wastewater inside the filter box.

[0009] The outlet pipe is installed symmetrically on the filter box based on the center of the filter box and is connected to the filter box to discharge the sewage in the filter box.

[0010] A pre-reserved cylinder is vertically installed through the surface of the inlet pipe;

[0011] A filter screen, installed inside the filter box, is used to filter large particles of debris in wastewater.

[0012] A scraper is located on the inner bottom wall of the filter box and contacts the side of the filter screen; a first telescopic rod is provided on the bottom surface of the filter box, the top end of the first telescopic rod passes through the filter box and is fixedly connected to the bottom surface of the scraper; multiple leakage holes are opened on the top surface of the scraper.

[0013] The push plate is located on the top surface of the filter box;

[0014] The second telescopic rod is installed on the side of the filter box, and its output end is installed vertically on the side of the push plate.

[0015] The third telescopic rod is installed on the side of the filter box, and its output end extends into the interior of the filter box;

[0016] The blocking plate is installed at the end of the output end of the third telescopic rod. When the third telescopic rod moves the blocking plate to the outlet position of the inlet pipe, the outlet of the inlet pipe is blocked by the blocking plate.

[0017] Preferably, the top surface of the push plate is provided with a first jet strip, the jet outlet of the first jet strip pointing towards the side of the push plate facing the scraper; the side of the push plate is provided with a first air pump, the output pipe of the first air pump being connected to the first jet strip.

[0018] Preferably, a baffle is vertically installed at the end of the push plate near the filter screen.

[0019] Preferably, a spray head is provided above the filter box, and the horizontal position of the spray head is located between the filter screen and the liquid outlet pipe. A water pump is provided on the top surface of the spray head, and the output pipe of the water pump is connected to the spray head, while the input pipe is connected to a liquid water source. A linkage frame is provided on the top surface of the spray head and on one side of the water pump. A fourth telescopic rod is provided at the end of the linkage frame away from the spray head, and the housing part of the fourth telescopic rod is fixed to the side of the filter box.

[0020] Preferably, the inner wall of the filter box is provided with a pair of support springs, and the ends of the support springs are fixedly connected to an oscillating rod; the oscillating rod is located between the spray head and the filter screen.

[0021] Preferably, the inner wall of the filter box is provided with a second air jet strip, and the air jet outlet of the second air jet strip points towards the filter surface of the filter screen.

[0022] Preferably, the inner wall of the filter box is provided with a water pump, and the water pump is provided inside the water pump. When the water pump is started, the water pump accelerates the pumping of sewage in the filter box into the outlet pipe.

[0023] Preferably, the inner wall of the filter box is provided with a pair of support plates, and the sides of the support plates are provided with a plurality of elastic sheets; when the scraper moves upward, the ends of the elastic sheets are squeezed and bent by the scraper.

[0024] Preferably, a gravity block is slidably connected inside the reserved cylinder.

[0025] Preferably, an extension tube is installed at the top of the reserved tube.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. The automatic cleaning structure of the wastewater filtration device of the present invention, by setting a pre-reserved cylinder on the inlet pipe, when cleaning the filter material filtered by the filter screen, the outlet of the inlet pipe is blocked, and the wastewater in the inlet pipe first enters the pre-reserved cylinder. Then, the filter material is cleaned by the cooperation of the scraper and the pusher plate. After that, all telescopic rods are reset, the filtration of wastewater continues, the outlet of the inlet pipe is released, and the wastewater that entered the pre-reserved cylinder flows downward into the inlet pipe under its own gravity, and then continues to enter the filter box for filtration. The entire cleaning process does not require interrupting the wastewater delivery process in the inlet pipe, which simplifies the cleaning procedure and avoids the impact of the interruption of the flow of wastewater in the inlet pipe on the wastewater treatment efficiency; thus improving the wastewater treatment efficiency.

[0028] 2. The automatic cleaning structure of the sewage filtration device of the present invention includes a first air jet strip on the top surface of the push plate. When the push plate pushes the filter material on the top surface of the scraper, the first air pump is activated and the output pipe of the first air pump injects gas into the first air jet strip. The gas is sprayed out from the air jet nozzle of the first air jet strip onto the surface of the push plate, which prevents the filter material from adhering to the surface of the push plate when the filter material on the scraper is pushed, thus preventing the cleaning from being incomplete. Attached Figure Description

[0029] The invention will now be further described with reference to the accompanying drawings.

[0030] Figure 1 This is a perspective view of the present invention;

[0031] Figure 2 This is the invention Figure 1 Enlarged diagram of part A in the middle;

[0032] Figure 3 This is the invention Figure 1 Enlarged diagram of section B;

[0033] Figure 4 This is a schematic diagram of the internal structure of the filter box of the present invention;

[0034] Figure 5 This is a top view of the filter box of the present invention;

[0035] Figure 6 This is a schematic diagram of the water pumping pipe of the present invention;

[0036] Figure 7 This is the invention Figure 5 Enlarged diagram of section C;

[0037] Figure 8 This is a schematic diagram of the support plate of the present invention;

[0038] Figure 9 This is the invention Figure 8 Enlarged schematic diagram of section D in the middle;

[0039] Figure 10 This is a schematic diagram of the reserved cylinder of the present invention.

[0040] In the diagram: 1. Filter box; 11. Inlet pipe; 12. Outlet pipe; 13. Reserved cylinder; 14. Filter screen; 15. Scraper; 2. Push plate; 20. First air jet strip; 201. First air pump; 21. Second telescopic rod; 22. Third telescopic rod; 23. Blocking plate; 3. Fourth telescopic rod; 31. Linkage frame; 32. Spray head; 33. Water pump; 4. Second air jet strip; 5. Support spring; 51. Vibrating rod; 52. Water suction pipe; 6. Support plate; 61. Elastic sheet; 7. Extension cylinder; 71. Gravity block. Detailed Implementation

[0041] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0042] like Figures 1 to 5 As shown, an automatic cleaning structure for a wastewater filtration device according to an embodiment of the present invention includes:

[0043] Filter box 1 is used for filtering sewage. It has a support frame on the side and an opening on the top.

[0044] The inlet pipe 11 is installed through the side of the filter box 1 and is used to transport the sewage in the filter box 1.

[0045] The outlet pipe 12 is installed symmetrically on the filter box 1 based on the center of the filter box 1 and is connected to the filter box 1 to discharge the sewage in the filter box 1.

[0046] The pre-reserved cylinder 13 is vertically installed on the surface of the liquid inlet pipe 11;

[0047] Filter screen 14 is installed inside filter box 1 and is used to filter large particulate matter in wastewater;

[0048] The scraper 15 is located on the inner bottom wall of the filter box 1 and is in contact with the side of the filter screen 14; a first telescopic rod is provided on the bottom surface of the filter box 1, the top end of the first telescopic rod passes through the filter box 1 and is fixedly connected to the bottom surface of the scraper 15; multiple leakage holes are provided on the top surface of the scraper 15.

[0049] Push plate 2 is set on the top surface of filter box 1;

[0050] The second telescopic rod 21 is installed on the side of the filter box 1, and its output end is installed vertically on the side of the push plate 2.

[0051] The third telescopic rod 22 is installed on the side of the filter box 1, and its output end extends into the interior of the filter box 1.

[0052] The blocking plate 23 is installed at the end of the output end of the third telescopic rod 22. When the third telescopic rod 22 moves the blocking plate 23 to the outlet position of the liquid inlet pipe 11, the outlet of the liquid inlet pipe 11 is blocked by the blocking plate 23.

[0053] In this embodiment of the invention, the inlet pipe 11 injects the wastewater to be filtered into the filter box 1. As the wastewater passes through the filter screen 14, impurities or floating matter inside are filtered out. The wastewater is then discharged through the outlet pipe 12. Impurities or floating matter remain in the filter box 1. When too much impurity or floating matter accumulates, it needs to be cleaned out of the filter box 1. Specifically, during cleaning, the third telescopic rod 22 is activated. The output end of the third telescopic rod 22 drives the blocking plate 23 to block the outlet of the inlet pipe 11. At this time, the flowing wastewater in the inlet pipe 11 enters the pre-reservoir cylinder 13. When the residual wastewater in the filter box 1 does not affect cleaning, the first telescopic rod is activated. The output end of the first telescopic rod drives the scraper 15 to move upwards. When the scraper 15 moves, it adheres to the surface of the filter screen 14; thus, the impurities or floating matter filtered by the filter screen 14 are pulled upwards, and the scraper 15 moves to a position where it meets the surface of the filter screen 14. When the top of the filter box 1 reaches the same height, the process stops. Then, the second telescopic rod 21 is activated, which drives the push plate 2 to move on the top surface of the scraper 15. The bottom end of the push plate 2 is attached to the top surface of the scraper 15 and moves, thereby pushing out the debris or floating objects carried by the top surface of the scraper 15. The sewage on the top surface of the scraper 15 leaks down through the drainage hole opened on the top surface and then falls into the collection device installed on the side of the filter box 1. After that, all telescopic rods are reset, the filtration of sewage continues, the outlet of the inlet pipe 11 is released, and the sewage that has entered the reserved cylinder 13 flows down into the inlet pipe 11 under its own gravity and then continues to enter the filter box 1 for filtration. The entire cleaning process does not require pausing the sewage transport process of the inlet pipe 11, which simplifies the cleaning procedure and avoids the impact of the pausing of sewage flow in the inlet pipe 11 on the sewage treatment efficiency, thus improving the sewage treatment efficiency.

[0054] The top surface of the push plate 2 is provided with a first air jet strip 20, and the air jet nozzle of the first air jet strip 20 points towards the side of the push plate 2 facing the scraper 15. The side of the push plate 2 is provided with a first air pump 201, and the output pipe of the first air pump 201 is connected to the first air jet strip 20. When the push plate 2 pushes the filter material on the top surface of the scraper 15, the first air pump 201 is activated, and the output pipe of the first air pump 201 injects gas into the first air jet strip 20. The gas is sprayed out from the air jet nozzle of the first air jet strip 20 onto the surface of the push plate 2, so as to prevent the filter material on the scraper 15 from adhering to the surface of the push plate 2 when pushing the filter material, resulting in incomplete cleaning.

[0055] A baffle 24 is vertically installed at one end of the push plate 2 near the filter screen 14. When the push plate 2 pushes the filter material on the top surface of the scraper 15, the baffle 24 moves synchronously at the top of the filter screen 14. The baffle 24 will obstruct the movement of the filter material on the top surface of the scraper 15, preventing the filter material near the filter screen 14 from falling over the filter screen 14 into the filter box 1 and affecting the quality of sewage filtration.

[0056] like Figure 1 , Figure 2 , Figure 4 As shown, a spray head 32 is installed above the filter box 1. The horizontal position of the spray head 32 is between the filter screen 14 and the outlet pipe 12. A water pump 33 is installed on the top surface of the spray head 32. The output pipe of the water pump 33 is connected to the spray head 32, and the input pipe is connected to a liquid water source. A linkage frame 31 is installed on the top surface of the spray head 32 and on one side of the water pump 33. A fourth telescopic rod 3 is installed at the end of the linkage frame 31 away from the spray head 32. The housing part of the fourth telescopic rod 3 is fixed to the side of the filter box 1. When the scraper 15 moves the filtered material filtered by the filter screen 14 upward, Simultaneously, the fourth telescopic rod 3 is activated. The fourth telescopic rod 3 drives the spray head 32 downward through the linkage frame 31, causing the spray head 32 to move downward into the filter box 1. Then, the water pump 33 is started. The water pump 33 draws liquid water through the input pipe and injects it into the spray head 32 through the output pipe. The spray head 32 sprays liquid water onto the filter screen 14. When the liquid water impacts the surface of the filter screen 14, it washes out the debris embedded in the filter holes of the filter screen 14. After the debris is washed out, it enters the top surface of the scraper 15 and is then carried out of the filter box 1, improving the cleaning effect of the filter screen 14.

[0057] like Figures 5 to 7 As shown, a pair of support springs 5 ​​are provided on the inner wall of the filter box 1, and an oscillating rod 51 is fixedly connected to the end of the support spring 5. The oscillating rod 51 is located between the spray head 32 and the filter screen 14. When the spray head 32 sprays liquid water onto the filter screen 14, the liquid water acts on the surface of the oscillating rod 51, causing the oscillating rod 51 to drive the support spring 5 to bend. Then, the end of the oscillating rod 51 strikes the filter screen 14. By adjusting the output power of the water pump 33, the rate at which the spray head 32 sprays liquid water changes, and the impact force of the spray head 32 spraying liquid water on the surface of the oscillating rod 51 changes. Therefore, the oscillating rod 51 intermittently strikes the filter screen 14, so that the filter screen 14 oscillates synchronously when the liquid water impacts the filter screen 14, so that the debris embedded in the filter holes of the filter screen 14 is quickly flushed out, further optimizing the cleaning process.

[0058] like Figures 5 to 8As shown, a second air jet strip 4 is provided on the inner wall of the filter box 1, and the air jet nozzle of the second air jet strip 4 points towards the filter surface of the filter screen 14. A second air pump is provided on the side of the second air jet strip 4. During cleaning, the second air pump is activated, and the second air pump inflates the second air jet strip 4. The gas sprayed by the second air jet strip 4 is directed towards the filter surface of the filter screen 14, preventing debris that has detached from the filter holes of the filter screen 14 from moving away from the top surface of the scraper 15 and re-entering the filter box 1, thus affecting the cleaning effect. It should be noted that the power of the second air pump is limited to prevent the airflow rate of the second air jet strip 4 from being too high and hindering the detachment of debris embedded in the filter holes of the filter screen 14.

[0059] The inner wall of the filter box 1 is equipped with a water suction pipe 52, and a liquid pump is installed inside the water suction pipe 52. When the liquid pump is started, the water suction pipe 52 accelerates the pumping of sewage in the filter box 1 into the liquid outlet pipe 12. During cleaning, the outlet of the liquid inlet pipe 11 is blocked, and the sewage in the filter box 1 will gradually flow out from the liquid outlet pipe 12. The cleaning process will only begin when the residual sewage in the filter box 1 does not affect the cleaning. At this time, the liquid pump inside the water suction pipe 52 is started, and the water suction pipe 52 accelerates the pumping of sewage in the filter box 1 into the liquid outlet pipe 12, which can further improve the cleaning efficiency.

[0060] like Figures 8 to 9 As shown, a pair of support plates 6 are provided on the inner wall of the filter box 1, and multiple elastic plates 61 are provided on the side of the support plates 6. When the scraper 15 moves upward, the ends of the elastic plates 61 are squeezed and bent by the scraper 15. When the scraper 15 moves upward, it intermittently squeezes the elastic plates 61. After the elastic plates 61 bend and reset, they will generate oscillation, which will drive the support plates 6 to vibrate. Then the vibration is returned to the scraper 15. When the scraper 15 oscillates, the sewage on the top surface is accelerated to fall through the surface drainage holes, which avoids a large amount of sewage being carried out of the filter box 1 during cleaning.

[0061] like Figure 10 As shown, a gravity block 71 is slidably connected inside the pre-reserved cylinder 13; when the blocking plate 23 releases the outlet of the liquid inlet pipe 11, the sewage in the pre-reserved cylinder 13 flows back into the liquid inlet pipe 11. At this time, the gravity block 71 squeezes the sewage in the pre-reserved cylinder 13, accelerating the discharge of sewage from the pre-reserved cylinder 13.

[0062] An extension cylinder 7 is installed at the top of the reserved cylinder 13; different numbers of extension cylinders 7 are set as needed to increase the space for the reserved cylinder 13 to receive sewage and prevent the sewage from entering the reserved cylinder 13 in such large quantities that it cannot be contained.

[0063] It should be noted that, in this embodiment of the invention, the telescopic rod and the pump body are automatically controlled by a program.

[0064] During operation, the inlet pipe 11 injects the wastewater to be filtered into the filter box 1. The wastewater passes through the filter screen 14, filtering out internal debris or floating matter. The wastewater is then discharged through the outlet pipe 12. Debris or floating matter remains in the filter box 1. When excessive debris or floating matter accumulates, it needs to be removed from the filter box 1. Specifically, during cleaning, the third telescopic rod 22 is activated. The output end of the third telescopic rod 22 drives the blocking plate 23 to block the outlet of the inlet pipe 11. At this time, the flowing wastewater in the inlet pipe 11 enters the pre-reserved cylinder 13, where it remains in the filter box 1. When the remaining wastewater does not affect cleaning, the first telescopic rod is activated. The output end of the first telescopic rod drives the scraper 15 upward, and the scraper 15 adheres to the surface of the filter screen 14 as it moves. This lifts the debris or floating matter filtered by the filter screen 14 upward. The scraper 15 stops when its top surface is at the same height as the top of the filter box 1. Then, the second telescopic rod 21 is activated. The second telescopic rod 21 drives the pusher 2 to move on the top surface of the scraper 15. The bottom end of the pusher 2 adheres to the top surface of the scraper 15 as it moves, thus pushing the debris or floating matter lifted by the top surface of the scraper 15 out of the top surface of the scraper 15. Wastewater leaks down through the drainage holes on the top surface and falls into the collection device installed on the side of the filter box 1. Then, the telescopic rods reset, wastewater filtration continues, the outlet of the inlet pipe 11 is released, and the wastewater entering the pre-reserved cylinder 13 flows downwards into the inlet pipe 11 under its own gravity, then continues to enter the filter box 1 for filtration. The entire cleaning process does not require interrupting the wastewater transport process in the inlet pipe 11, simplifying the cleaning procedure and avoiding the impact of interrupted wastewater flow on wastewater treatment efficiency. Specifically, the push plate 2 pushes the scraper 15... When the filter material on the surface is being filtered, the first air pump 201 is started, and the output pipe of the first air pump 201 injects gas into the first air jet strip 20. The gas is sprayed out from the air jet nozzle of the first air jet strip 20 onto the surface of the push plate 2, preventing the filter material on the scraper 15 from adhering to the surface of the push plate 2 when it is pushed. When the push plate 2 pushes the filter material on the top surface of the scraper 15, the baffle 24 moves synchronously at the top of the filter screen 14. The baffle 24 will obstruct the movement of the filter material on the top surface of the scraper 15, preventing the filter material near the filter screen 14 from falling into the filter box 1 and affecting the quality of wastewater filtration.

[0065] When the scraper 15 lifts the filtered material from the filter screen 14 upwards, the fourth telescopic rod 3 is simultaneously activated. The fourth telescopic rod 3, via the linkage 31, moves the spray head 32 downwards into the filter box 1. Then, the water pump 33 is started, drawing liquid water through the input pipe and injecting it into the spray head 32 through the output pipe. The spray head 32 sprays liquid water onto the filter screen 14, and the impact of the liquid water on the surface of the filter screen 14 flushes out the debris embedded in the filter holes. The flushed debris enters the top surface of the scraper 15 and is then carried out of the filter box 1. Simultaneously, when the spray head 32 sprays liquid water onto the filter screen 14, the liquid water acts on the surface of the oscillating rod 51, causing the oscillating rod 51 to bend the support spring 5. The end of the oscillating rod 51 then strikes the filter screen 14. By adjusting the output power of the water pump 33, the rate at which the liquid water is sprayed from the spray head 32 is changed, thus altering the impact force of the liquid water sprayed from the spray head 32 on the surface of the oscillating rod 51. Consequently, the oscillating rod 51 intermittently impacts the filter screen 14, causing the filter screen 14 to oscillate synchronously when the liquid water impacts it, thereby quickly flushing out the debris embedded in the filter holes of the filter screen 14. During cleaning, the second air pump is activated, inflating the second air jet strip 4. The gas ejected by the second air jet strip 4 is directed towards the filter surface of the filter screen 14, preventing debris that has detached from the filter holes of the filter screen 14 from moving away from the top surface of the scraper 15 and re-entering the filter box 1, thus affecting the cleaning effect. It should be noted that the power of the second air pump is limited to prevent the airflow rate of the second air jet strip 4 from being too high and hindering the detachment of debris embedded in the filter holes of the filter screen 14.

[0066] During cleaning, if the outlet of the inlet pipe 11 is blocked, the wastewater in the filter box 1 will gradually flow out from the outlet pipe 12. The cleaning process will only begin when the residual wastewater in the filter box 1 no longer affects the cleaning. At this time, the pump inside the suction pipe 52 will start, and the suction pipe 52 will accelerate the pumping of wastewater from the filter box 1 into the outlet pipe 12, which can further improve the cleaning efficiency. When the scraper 15 moves upward, it intermittently squeezes the elastic sheet 61. The elastic sheet 61 bends and then returns to its original position, which will cause oscillation, driving the support plate 6 to vibrate. The wastewater is returned to the scraper 15. When the scraper 15 vibrates, the wastewater on the top surface is accelerated and falls through the surface drainage holes, preventing a large amount of wastewater from being carried out of the filter box 1 during cleaning. When the blockage plate 23 releases the outlet of the inlet pipe 11, the wastewater in the pre-reserved cylinder 13 flows back into the inlet pipe 11. At this time, the gravity block 71 squeezes the wastewater in the pre-reserved cylinder 13, accelerating the discharge of wastewater from the pre-reserved cylinder 13. Different numbers of extension cylinders 7 are set as needed to increase the space for the pre-reserved cylinder 13 to receive wastewater and prevent the wastewater from entering the pre-reserved cylinder 13 in such large quantities that it cannot be received.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic cleaning structure for a wastewater filtration device, characterized in that: include: The filter box (1) is used to filter sewage. It has a support frame on the side and an opening on the top. An inlet pipe (11) is installed through the side of the filter box (1) for conveying wastewater in the filter box (1); The outlet pipe (12) is installed symmetrically on the filter box (1) based on the center of the filter box (1) and is connected to the filter box (1) to discharge the sewage in the filter box (1); A pre-reserved cylinder (13) is vertically installed on the surface of the liquid inlet pipe (11); A filter screen (14) is installed inside the filter box (1) for filtering large particles in the wastewater; The scraper (15) is located on the inner bottom wall of the filter box (1) and is in contact with the side of the filter screen (14); the bottom surface of the filter box (1) is provided with a first telescopic rod, the top end of the output end of the first telescopic rod passes through the filter box (1) and is fixedly connected to the bottom surface of the scraper (15); the top surface of the scraper (15) is provided with multiple leakage holes. Push plate (2) is set on the top surface of filter box (1); The second telescopic rod (21) is installed on the side of the filter box (1), and its output end is installed vertically on the side of the push plate (2). The third telescopic rod (22) is installed on the side of the filter box (1) and its output end extends into the interior of the filter box (1); The blocking plate (23) is installed at the end of the output end of the third telescopic rod (22). When the third telescopic rod (22) moves the blocking plate (23) to the outlet position of the liquid inlet pipe (11), the outlet of the liquid inlet pipe (11) is blocked by the blocking plate (23). A spray head (32) is provided above the filter box (1). The horizontal position of the spray head (32) is between the filter screen (14) and the liquid outlet pipe (12). A water pump (33) is provided on the top surface of the spray head (32). The output pipe of the water pump (33) is connected to the spray head (32), and the input pipe is connected to the liquid water source. A linkage frame (31) is provided on the top surface of the spray head (32) and on one side of the water pump (33). A fourth telescopic rod (3) is provided at the end of the linkage frame (31) away from the spray head (32). The housing part of the fourth telescopic rod (3) is fixed to the side of the filter box (1). The inner wall of the filter box (1) is provided with a pair of support springs (5), and the ends of the support springs (5) are fixedly connected to an oscillating rod (51); the oscillating rod (51) is located between the spray head (32) and the filter screen (14); The inner wall of the filter box (1) is provided with a pair of support plates (6), and the side of the support plates (6) is provided with a plurality of elastic sheets (61); when the scraper (15) moves upward, the ends of the elastic sheets (61) are squeezed and bent by the scraper (15).

2. The automatic cleaning structure of a sewage filtration device according to claim 1, characterized in that: The top surface of the push plate (2) is provided with a first jet strip (20), and the jet nozzle of the first jet strip (20) points towards the side of the push plate (2) facing the scraper (15); the side of the push plate (2) is provided with a first air pump (201), and the output pipe of the first air pump (201) is connected to the first jet strip (20).

3. The automatic cleaning structure of a sewage filtration device according to claim 1, characterized in that: A baffle (24) is vertically installed at one end of the push plate (2) near the filter screen (14).

4. The automatic cleaning structure of a sewage filtration device according to claim 1, characterized in that: The inner wall of the filter box (1) is provided with a second air jet strip (4), and the air jet nozzle of the second air jet strip (4) points towards the filter surface of the filter screen (14).

5. The automatic cleaning structure of a sewage filtration device according to claim 1, characterized in that: The inner wall of the filter box (1) is provided with a water pump (52), and the inside of the water pump (52) is provided with a liquid pump. When the liquid pump is started, the water pump (52) accelerates the pumping of sewage in the filter box (1) into the liquid outlet pipe (12).

6. The automatic cleaning structure of a sewage filtration device according to claim 1, characterized in that: The reserved cylinder (13) is internally slidably connected to a gravity block (71).

7. The automatic cleaning structure of a sewage filtration device according to claim 1, characterized in that: An extension tube (7) is installed at the top of the reserved tube (13).

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