Sewage treatment device for municipal landscaping

Abstract

The invention relates to the technical field of landscaping, and discloses a municipal landscaping sewage treatment device which comprises a treatment shell, a sewage filtering assembly and a sewage pretreatment assembly. A cylindrical discharge hole is formed in the treatment shell, and an upper cover plate and a lower cover plate which are detachable are arranged at the upper end and the lower end of the discharge hole respectively. The side walls of the upper and lower ends of the treatment shell are respectively connected with a water inlet part and a water outlet part. The sewage filtering assembly is arranged at one end, close to the water outlet part, in the discharge hole. The sewage pretreatment assembly is arranged at one end, close to the water inlet part, in the discharge hole. The sewage pretreatment assembly is arranged in the treatment shell, in the overall deformation process of the elastic filter screen, the inner hole diameter of the filter screen is continuously changed, in the hole diameter changing process, extrusion and stretching occur between the hole walls of the adjacent filter holes, dirt attached in the filter holes can be damaged to a certain degree, the dirt falls off, and certain self-cleaning is achieved; the filtering capacity of the elastic filter screen is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of gardening and greening, and in particular to a sewage treatment device for municipal gardening and greening. Background Art

[0002] As people's lives improve day by day, their quality of life is getting better and better, and the number of gardens built in life is also increasing. In the process of garden design, sewage treatment is a very important project. For example, the treatment of sewage in fountains and viewing pools directly affects the image of the entire garden.

[0003] However, when treating sewage in general municipal gardens, the sewage is simply filtered and then put into the irrigation of garden trees or used for drug purification before reuse; this simple sewage filtration treatment device can only filter large branches, leaves, stones and other debris, and it is difficult to handle some small-volume dirt, especially some water-soluble flocs and soil, etc. These dirts are very likely to cause blockage when they subsequently enter the irrigation nozzle, water pipe or the filter plate of the water inlet of the drug purifier, affecting the normal use of the equipment, requiring disassembly and cleaning, and wasting manpower; at the same time, if the filter net is directly installed on the sewage discharge pipe, it must also be frequently disassembled and cleaned, wasting manpower. Summary of the invention

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A sewage treatment device for municipal landscaping comprises a treatment shell, a sewage filtering component and a sewage pretreatment component.

[0006] A cylindrical discharge hole is arranged inside the treatment shell, and a detachable upper cover plate and a lower cover plate are arranged at the upper and lower ends of the discharge hole, respectively. A water inlet and a water outlet are connected to the side walls at the upper and lower ends of the treatment shell, respectively.

[0007] The sewage filter assembly is arranged in the discharge hole at one end close to the water outlet, and is used for filtering the sewage.

[0008] The sewage pretreatment component is arranged at one end of the discharge hole near the water inlet. The sewage treatment component includes a treatment frame, an elastic filter screen, a filter plate and an elastic reset member. The treatment frame is located in the discharge hole and its outer contour is in contact with the inner wall of the discharge hole. A cylindrical through hole is arranged inside the treatment frame, and the bottom is placed on a preset step in the discharge hole. The elastic filter screen is installed in the middle of the through hole. The filter plate is installed below the elastic filter screen. The elastic reset member is installed between the elastic filter screen and the filter plate. Among them, when the elastic reset member is in a relaxed state, the elastic filter screen is arched toward one end of the upper cover plate. When the elastic reset member is in a compressed state, the elastic filter screen can be deformed to be arched toward one end of the downward cover plate.

[0009] In one embodiment of the present invention, a dirt receiving groove is provided on the inner wall of the processing frame. A plurality of overflow holes are provided between the dirt receiving groove and the through hole. The aperture of the overflow hole is the same as the filtration aperture of the filter plate. A sewage outlet connected to the dirt receiving groove is provided on the inner wall of the processing frame at the end wall of the filter plate and the elastic filter net.

[0010] In one embodiment of the present invention, the filter plate is arched toward one end of the elastic filter screen.

[0011] In one solution of the present invention, a self-cleaning assembly is arranged in the processing frame, and the self-cleaning assembly includes a plurality of arc-shaped scrapers, which are evenly distributed in the through hole in the circumferential direction and are all mounted on the inner wall of the processing frame through elastic rods.

[0012] When the elastic filter is arched toward one end of the upper cover plate, the elastic rod is in a contracted state, and the arc-shaped scraper is in contact with the outer wall of the elastic filter.

[0013] In one embodiment of the present invention, the sewage filter assembly includes a filter barrel and a connecting plate.

[0014] The filter barrel is located in the discharge hole, and the outer wall is provided with water holes, the aperture of which is smaller than the filter aperture of the filter plate.

[0015] The connecting plate fixing ring is sleeved on the outside of the filter barrel, and the outer contour is provided with an internal thread matching with the preset external thread on the inner wall of the processing shell.

[0016] In one solution of the present invention, a partition assembly is provided at the water inlet, and the partition assembly includes a blocking plate, an annular limiting plate and a driving member.

[0017] The blocking plate is rotatably installed in the water inlet.

[0018] The outer wall of the annular limiting plate is connected to the inner wall of the water inlet portion. The side wall of the annular limiting plate is provided with a waterproof ring.

[0019] The driving member is used to drive the blocking plate to rotate in the water inlet. When the blocking plate contacts the annular limiting plate, the water inlet is in a cut-off state.

[0020] In one embodiment of the present invention, the driving member includes a push rod, a sliding block and two sealing balls.

[0021] The push rod movably penetrates a movable hole preset in the side wall of the water inlet portion.

[0022] One end of the sliding block is rotatably connected to one end of the push rod located in the water inlet portion, and the other end is slidably installed in a sliding groove preset on the surface of the blocking plate.

[0023] The two sealing balls are respectively located inside and outside the water inlet part and are both sleeved on the push rod.

[0024] When the water inlet is in a cut-off state, the sealing ball located inside seals the movable hole. When the water inlet is in a sealed state, the sealing ball located outside seals the movable hole.

[0025] In one solution of the present invention, it also includes a flow monitor 1, a flow monitor 2, an alarm and a controller.

[0026] The flow monitor 1 is arranged at the water inlet to monitor the flow rate L1 of the water inlet.

[0027] The flow monitor 2 is arranged below the processing frame and is used to monitor the flow L2 at the bottom of the processing frame.

[0028] The alarm is used to send out abnormal signals.

[0029] The controller is used to control the alarm to send out an abnormal signal of the sewage pretreatment component when it is detected that the difference between the flow rate L1 and the flow rate L2 exceeds a preset flow difference value of one.

[0030] In one embodiment of the present invention, a flow rate monitor and a water level detector are also included.

[0031] The flow monitor 3 is installed in the water outlet to monitor the flow rate L3 of the water inlet.

[0032] The water level detector is arranged in the filter barrel, and is used to monitor the water level H in the filter barrel.

[0033] The controller is also used to: when it is detected that the difference between the flow rate L2 and the flow rate L3 exceeds the preset flow difference value 2 for a preset time, determine whether the growth rate of the water level H exceeds the preset range. If so, control the alarm to send an abnormal signal at the water outlet of the filter barrel; otherwise, control the alarm to send an abnormal signal at the water inlet of the filter barrel.

[0034] Beneficial effects of the present invention:

[0035] The municipal landscaping sewage treatment device of the present invention is provided with a sewage pretreatment component in the treatment shell. When sewage accumulates, under the action of gravity, the elastic filter screen is deformed to an arched shape at one end of the downward cover plate. During the overall deformation process of the elastic filter screen, the aperture in the filter screen is constantly changing. During the aperture change process, squeezing and stretching occur between the hole walls of adjacent filter holes, which can damage the dirt attached to the filter holes to a certain extent, causing the dirt to fall off, achieving a certain degree of self-cleaning, and ensuring the filtering capacity of the elastic filter screen. After the dirt is cleaned, the elastic filter screen is reset under the action of the elastic reset member, and can be reused, thereby improving practicality.

[0036] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 It is a schematic diagram of the appearance structure of the sewage treatment device of the present invention;

[0039] Figure 2 It is a schematic diagram of the internal structure of the sewage treatment device of the present invention;

[0040] Figure 3 It is a schematic diagram of the structure of the processing frame in the present invention;

[0041] Figure 4 The present invention Figure 3 A magnified view of the structure at center A;

[0042] Figure 5 It is a schematic diagram of the layout of the elastic filter screen and the arc scraper in the present invention;

[0043] Figure 6 It is a structural schematic diagram of the partition assembly in the present invention;

[0044] Figure 7 The present invention Figure 6 A magnified view of the structure at B in the middle;

[0045] Figure 8 It is a structural schematic diagram of the water inlet portion in the present invention in a cut-off state.

[0046] In the figure: 1. treatment shell; 101. discharge hole; 2. water inlet; 3. water outlet; 4. upper cover; 5. lower cover; 6. treatment frame; 601. through hole; 602. sewage tank; 603. sewage outlet; 7. filter barrel; 8. connecting plate; 9. elastic filter net; 10. filter plate; 11. elastic reset member; 12. elastic rod; 13. arc scraper; 14. blocking plate; 15. annular limit plate; 16. push rod; 17. sealing ball; 18. slider; 19. slide groove. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0050] See also Figure 1-8 The present invention is a sewage treatment device for municipal landscaping, comprising a treatment shell 1, a sewage filtering component and a sewage pretreatment component.

[0051] A cylindrical discharge hole 101 is provided inside the treatment housing 1, and a detachable upper cover plate 4 and a lower cover plate 5 are provided at the upper and lower ends of the discharge hole 101. A water inlet 2 and a water outlet 3 are connected to the side walls at the upper and lower ends of the treatment housing 1, respectively.

[0052] The sewage filter assembly is arranged in the discharge hole 101 at one end close to the water outlet 3, and is used for filtering sewage.

[0053] The sewage pretreatment component is arranged in the discharge hole 101 at one end close to the water inlet 2. The sewage treatment component includes a treatment frame 6, an elastic filter screen 9, a filter plate 10 and an elastic reset member 11. The treatment frame 6 is located in the discharge hole 101 and its outer contour fits the inner wall of the discharge hole 101. A cylindrical through hole 601 is arranged inside the treatment frame 6, and the bottom is placed on a preset step in the discharge hole 101. The elastic filter screen 9 is installed in the middle of the through hole 601. The filter plate 10 is installed below the elastic filter screen 9. The elastic reset member 11 is installed between the elastic filter screen 9 and the filter plate 10. Among them, when the elastic reset member 11 is in a relaxed state, the elastic filter screen 9 is arched at one end toward the upper cover plate 4. When the elastic reset member 11 is in a compressed state, the elastic filter screen 9 can be deformed to be arched at one end toward the lower cover plate 5.

[0054] It should be noted that

[0055] 1) A bracket can be provided at the bottom of the treatment housing 1, so that the bracket can be used to fix the treatment housing 1 during use to maintain the stability of the treatment housing 1. The upper and lower cover plates 5 of the treatment housing 1 are detachably arranged to facilitate the cleaning of the internal sewage filtering components and sewage pretreatment components; a common connection method can be adopted, such as threaded matching, and mutually matching threads are provided between the cover plate and the treatment housing 1. Of course, considering the sealing problem, a corresponding sealing ring should also be provided.

[0056] 2) In the sewage treatment device of the present invention, the preset step in the discharge hole 101 of the treatment shell 1 is to support the bottom of the treatment frame 6, and a corresponding sealing gasket should also be provided to prevent sewage from directly flowing into the sewage filter assembly. Similarly, a corresponding sealing gasket can also be provided between the outer wall of the treatment frame 6 and the inner wall of the treatment shell 1.

[0057] 3) The design of the elastic filter screen 9 in the present invention can properly self-clean the filter screen itself under the premise of filtering. Specifically, in the initial state (the elastic reset member 11 is in a relaxed state, that is, not under pressure), the elastic filter screen 9 uses its own filter holes to filter sewage. When the filter holes are blocked for a long time or the filtering effect of the elastic filter screen 9 is reduced due to large amounts of dirt, due to the accumulation of sewage, the elastic filter screen 9 is deformed under the action of gravity and begins to continuously compress the elastic reset member 11. Finally, the elastic filter screen 9 is deformed to an arched shape at one end of the downward cover plate 5. During the overall deformation process of the elastic filter screen 9, the pore size in the filter screen is constantly changing. During the pore size change process, squeezing and stretching occur between the pore walls of adjacent filter holes, which can cause certain damage to the dirt attached to the filter holes, causing the dirt to fall off, thereby achieving a certain degree of self-cleaning. Of course, it should be noted that when selecting the elastic filter mesh 9, it is necessary to consider whether it can realize the entire deformation process; in some further embodiments, some spikes can also be set on the hole wall of the filter hole, and ensure that the spikes will not interfere with each other during the deformation process, and the spikes can be used to further break up the dirt.

[0058] 4) The top of the treatment frame 6 should be lower than the water inlet 2 to ensure that the sewage can enter the treatment frame 6 smoothly.

[0059] 5) The specific type of the elastic reset member 11 is not limited, as long as it can ensure that the elastic filter screen 9 is reset after being deformed under the action of water pressure and gravity, such as a common elastic telescopic rod, a spring with a guiding function, etc., which will not be described in detail here.

[0060] The municipal landscaping sewage treatment device of the present invention is provided with a sewage pretreatment component in the treatment housing 1. When sewage accumulates, under the action of gravity, the elastic filter screen 9 is deformed to an arched shape at one end of the downward cover plate 5. During the overall deformation process of the elastic filter screen 9, the pore size in the filter screen is constantly changing. During the pore size change process, squeezing and stretching occur between the pore walls of adjacent filter holes, which can damage the dirt attached to the filter holes to a certain extent, causing the dirt to fall off, achieving a certain degree of self-cleaning, and ensuring the filtering capacity of the elastic filter screen 9. After the dirt is cleaned, the elastic filter screen 9 is reset under the action of the elastic reset member 11, and can be reused, thereby improving practicality.

[0061] Please combine Figure 2-4 In some embodiments of the present invention, the inner wall of the processing frame 6 may also be provided with a dirt receiving groove 602. There are a plurality of overflow holes between the dirt receiving groove 602 and the through hole 601. The aperture of the overflow hole is the same as the filter aperture of the filter plate 10. A sewage outlet 603 connected to the dirt receiving groove 602 is provided on the inner wall of the processing frame 6 at the end wall of the filter plate 10 and the elastic filter net 9. By providing the dirt receiving groove 602, the dirt accumulated on the filter plate 10 and the elastic filter net 9 can flow into the dirt receiving groove 602 for storage, and can be cleaned up regularly.

[0062] Of course, in order to facilitate sewage discharge, in some specific implementations, the structure of the filter plate 10 can also improve the sewage discharge effect, for example, it is arched toward one end of the elastic filter screen 9.

[0063] Considering that the elastic filter screen 9 has a reset process when it is deformed, in some embodiments, this process can be used to further clean the elastic filter screen 9. Figure 1-5 A self-cleaning assembly may be provided in the processing frame 6, and the self-cleaning assembly includes a plurality of arc-shaped scrapers 13. The plurality of arc-shaped scrapers 13 are evenly distributed in the through hole 601 in the circumferential direction, and are all mounted on the inner wall of the processing frame 6 through the elastic rod 12. When the elastic filter screen 9 is arched toward one end of the upper cover plate 4, the elastic rod 12 is in a contracted state, and the arc-shaped scraper 13 is in contact with the outer wall of the elastic filter screen 9.

[0064] During the deformation process of the elastic filter screen 9, when the elastic filter screen 9 moves downward, the elastic rod 12 is continuously reset, and the adjacent arc scrapers 13 are continuously gathered together; when the elastic filter screen 9 moves upward, the elastic filter screen 9 first contacts with the gathered arc scrapers 13, and as the elastic filter screen 9 continues to move upward, the arc scrapers 13 continuously slide along the outer wall of the elastic filter screen 9 toward the inner wall of the processing frame 6, and clean the dirt to both sides, and flow into the dirt receiving tank 602, thereby realizing the self-cleaning of the elastic filter screen 9.

[0065] Please combine Figure 1-2In the present invention, the sewage filter assembly includes a filter barrel 7 and a connecting plate 8. The filter barrel 7 is located in the discharge hole 101, and the outer wall is provided with water holes. The aperture of the water hole is smaller than the filter aperture of the filter plate 10. The connecting plate 8 is fixedly sleeved on the outside of the filter barrel 7, and the outer contour is provided with an internal thread that matches the preset external thread on the inner wall of the processing shell 1. It should be noted that, with the connecting plate 8 as the boundary, the filter barrel 7 above the connecting plate 8 is the water inlet end, and the lower part is the water outlet end. The water holes at the water inlet end filter the sewage once, and the water holes at the water outlet end filter the sewage twice, and finally enter the water outlet part 3 for discharge. Through the multi-stage filtration treatment method, it can be ensured that when the sewage discharged from the water outlet part 3 enters the next link (whether it is drug purification or direct spraying irrigation), it will not cause blockage to the corresponding structure.

[0066] Considering that when cleaning the sewage filter component and the sewage pretreatment component, the water flow needs to be cut off, therefore, in some embodiments, a partition component can be provided in the water inlet 2. Figure 1-8 The partition assembly includes a blocking plate 14, an annular limiting plate 15 and a driving member. The blocking plate 14 is rotatably installed in the water inlet 2. The outer wall of the annular limiting plate 15 is connected to the inner wall of the water inlet 2. The side wall of the annular limiting plate 15 is provided with a waterproof ring. The driving member is used to drive the blocking plate 14 to rotate in the water inlet 2. Among them, when the blocking plate 14 is in contact with the annular limiting plate 15, the water inlet 2 is in a blocking state.

[0067] It should be noted that the specific type of the driving member is not limited, and it can be used as long as it can rotate the blocking plate 14 to achieve the isolation state of the water inlet 2. Figure 6-8 In some embodiments, the driving member includes a push rod 16, a slider 18 and two sealing balls 17. The push rod 16 movably penetrates a movable hole preset in the side wall of the water inlet 2.

[0068] One end of the slider 18 is rotatably connected to one end of the push rod 16 located in the water inlet 2, and the other end is slidably installed in a preset slide groove 19 on the surface of the blocking plate 14. Two sealing balls 17 are respectively located inside and outside the water inlet 2, and are both sleeved on the push rod 16.

[0069] When the water inlet 2 is in the blocking state, the sealing ball 17 located inside seals the movable hole. When the water inlet 2 is in the sealing state, the sealing ball 17 located outside seals the movable hole.

[0070] It should be explained that corresponding sealing pads or other sealing materials should be provided at both ends of the movable hole to ensure that the sealing ball 17 can be sealed and leak-proof when it contacts with the movable hole.

[0071] When in use, the blocking plate 14 can be rotated by pushing the push rod 16 to drive the slider 18 to move in the slide groove 19, thereby switching the isolation state and the flow state of the water inlet 2. At the same time, the design of the two sealing balls 17 ensures that no sewage will flow out of the water inlet 2 regardless of the isolation or flow state.

[0072] Furthermore, in order to improve the integrity and practicality of the structure, a notch should be provided at the bottom of the upper edge of the upper cover plate 4; the notch is directly opposite to the top of the push rod 16, and when the water inlet 2 is in a flowing state, the top of the push rod 16 is located in the notch, and when the push rod 16 is pushed downward until the water inlet 2 is in a blocked state, the push rod 16 is located outside the notch. This structural design ensures that when the water inlet 2 is in a flowing state, the top of the push rod 16 is located in the notch of the upper cover plate 4, causing the upper cover plate 4 to be unable to rotate normally due to interference with the push rod 16, thereby avoiding the situation where the upper cover plate 4 is opened without forgetting to block the water flow.

[0073] Furthermore, in order to accurately determine which specific component has a problem and needs to be repaired or cleaned, some embodiments of the present invention may also include flow monitor 1, flow monitor 2, an alarm and a controller.

[0074] The flow monitor 1 is arranged at the water inlet 2 and is used to monitor the flow rate L1 of the water inlet 2 .

[0075] The flow monitor 2 is arranged below the processing frame 6 and is used to monitor the flow L2 at the bottom of the processing frame 6 .

[0076] The alarm is used to send out abnormal signals.

[0077] The controller is used to control the alarm to send out an abnormal signal of the sewage pretreatment component when it is detected that the difference between the flow rate L1 and the flow rate L2 exceeds a preset flow difference value of one.

[0078] It should be noted that the alarm can sound an alarm or have a display screen to remind external personnel that the current device status is abnormal. The preset flow difference value 1 is set according to experimental data and experience values. By judging that the difference between the flow L1 and the flow L2 exceeds the preset flow difference value 1, it can be concluded that there is a problem between the water inlet and the water outlet of the processing frame 6, that is, the fluidity of the elastic filter 9 and the filter plate 10 is reduced, and manual intervention and cleaning are required.

[0079] Of course, in a further embodiment, a flow monitor and a water level detector may also be included.

[0080] The flow monitor 3 is installed in the water outlet 3 and is used to monitor the flow rate L3 of the water inlet 2.

[0081] The water level detector is arranged in the filter barrel 7 , and is used to monitor the water level H in the filter barrel 7 .

[0082] The controller is also used to: when it is detected that the difference between the flow rate L2 and the flow rate L3 exceeds the preset flow difference value 2 for a preset time, determine whether the growth rate of the water level H exceeds the preset range. If so, control the alarm to send an abnormal signal at the water outlet of the filter barrel 7; otherwise, control the alarm to send an abnormal signal at the water inlet of the filter barrel 7.

[0083] The preset flow difference value 2, the preset range of the growth rate, and the preset duration are all set by experimental data and empirical values. The state of the filter barrel 7 is comprehensively judged by combining whether the difference between the flow L2 and the flow L3 exceeds the preset flow difference value 2, and the duration of the difference exceeding the preset flow difference value 2; when the duration of the difference between the flow L2 and the flow L3 exceeding the preset flow difference value 2 reaches the preset duration, it can be clearly seen that the flowability of the filter barrel 7 is affected, and it is further judged whether the growth rate of the water level H exceeds the preset range. If it is, the state of the water outlet of the filter barrel 7 is abnormal. At this time, the outside personnel open the lower cover plate 5 to check the water outlet of the filter barrel 7. If it is clean, it is cleaned. If the structure is damaged, the corresponding parts can be replaced. Otherwise, it is an abnormal signal at the water inlet end of the filter barrel 7. At this time, the outside personnel open the top cover plate 4, take out the processing frame 6, check the corresponding conditions, if the component structure is normal, clean the dirt in the sewage tank 602, and then clean the water inlet part 2 of the filter barrel 7. If parts need to be replaced, they can be directly replaced.

[0084] Through the arrangement of flow monitor 1, flow monitor 2, flow monitor 3, water level detector, alarm and controller, it is possible to preliminarily determine which component has a problem with the filtering effect, and then take corresponding measures. This changes the deficiency of traditional filtering structures that require overall dismantling and inspection when poor filtration occurs, and can save workload.

[0085] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A sewage treatment device for municipal landscaping, comprising: A treatment shell (1) is provided with a cylindrical discharge hole (101) inside, and a detachable upper cover plate (4) and a lower cover plate (5) are respectively provided at the upper and lower ends of the discharge hole (101); the side walls at the upper and lower ends of the treatment shell (1) are respectively connected to a water inlet (2) and a water outlet (3); and A sewage filtering assembly, which is arranged in the discharge hole (101) at one end close to the water outlet (3) and is used to filter the sewage; It is characterized by further comprising: A sewage pretreatment component is arranged in the discharge hole (101) at one end close to the water inlet (2); the sewage treatment component comprises: a processing frame (6) which is located in the discharge hole (101) and whose outer contour is in contact with the inner wall of the discharge hole (101); a cylindrical through hole (601) is provided inside the processing frame (6), and whose bottom is placed on a preset step in the discharge hole (101); An elastic filter screen (9) installed in the middle of the through hole (601); a filter plate (10) installed below the elastic filter screen (9); and An elastic reset member (11) installed between the elastic filter screen (9) and the filter plate (10); When the elastic return member (11) is in a relaxed state, the elastic filter net (9) is arched toward one end of the upper cover plate (4); when the elastic return member (11) is in a compressed state, the elastic filter net (9) can be deformed to be arched toward one end of the lower cover plate (5).

2. The municipal landscaping sewage treatment device according to claim 1 is characterized in that: The inner wall of the processing frame (6) is provided with a dirt receiving groove (602); a plurality of overflow holes are provided between the dirt receiving groove (602) and the through hole (601); the aperture of the overflow holes is the same as the filtering aperture of the filter plate (10); and a sewage outlet (603) connected to the dirt receiving groove (602) is provided on the inner wall of the processing frame (6) at the end wall of the filter plate (10) and the elastic filter net (9).

3. The municipal landscaping sewage treatment device according to claim 2 is characterized in that: The filter plate (10) is arched toward one end of the elastic filter net (9).

4. The municipal landscaping sewage treatment device according to claim 2 is characterized in that: A self-cleaning component is arranged in the processing frame (6), and the self-cleaning component comprises a plurality of arc-shaped scrapers (13); the plurality of arc-shaped scrapers (13) are evenly distributed in the through hole (601) in the circumferential direction, and are all mounted on the inner wall of the processing frame (6) via elastic rods (12); When the elastic filter screen (9) is arched toward one end of the upper cover plate (4), the elastic rod (12) is in a contracted state, and the arc-shaped scraper (13) is in contact with the outer wall of the elastic filter screen (9).

5. The municipal landscaping sewage treatment device according to claim 1 is characterized in that: The sewage filtering component comprises: A filter barrel (7) located in the discharge hole (101) and having water holes on its outer wall; the diameter of the water holes is smaller than the filter diameter of the filter plate (10); and The connecting plate (8) has a fixing ring sleeve on the outside of the filter barrel (7), and its outer contour is provided with an internal thread that matches the preset external thread on the inner wall of the processing shell (1).

6. The municipal landscaping sewage treatment device according to claim 5 is characterized in that: The water inlet (2) is provided with a partition assembly; the partition assembly comprises: A blocking plate (14) rotatably mounted in the water inlet portion (2); An annular limiting plate (15), the outer wall of which is connected to the inner wall of the water inlet (2); a waterproof ring is provided on the side wall of the annular limiting plate (15); and A driving member is used to drive the blocking plate (14) to rotate in the water inlet (2); wherein when the blocking plate (14) is in contact with the annular limiting plate (15), the water inlet (2) is in a blocked state.

7. The municipal landscaping sewage treatment device according to claim 6 is characterized in that: The driving member comprises: A push rod (16) which movably penetrates a movable hole preset in the side wall of the water inlet portion (2); A slider (18), one end of which is rotatably connected to one end of the push rod (16) located in the water inlet portion (2), and the other end of which is slidably mounted in a slide groove (19) preset on the surface of the blocking plate (14); and Two sealing balls (17), which are respectively located inside and outside the water inlet (2) and are both sleeved on the push rod (16); When the water inlet (2) is in a blocked state, the sealing ball (17) located inside seals the movable hole; when the water inlet (2) is in a sealed state, the sealing ball (17) located outside seals the movable hole.

8. The municipal landscaping sewage treatment device according to claim 6 is characterized in that: Also includes: A flow monitor 1, which is arranged at the water inlet (2) and is used to monitor the flow rate L1 of the water inlet (2); A second flow monitor, which is arranged below the processing frame (6) and is used to monitor the flow L2 at the bottom of the processing frame (6); An alarm device, which is used to send out abnormal signals; as well as The controller is used to control the alarm to send out an abnormal signal of the sewage pretreatment component when it is detected that the difference between the flow rate L1 and the flow rate L2 exceeds a preset flow difference value of one.

9. The municipal landscaping sewage treatment device according to claim 8 is characterized in that: Also includes: A flow rate monitor 3, which is installed in the water outlet (3) and is used to monitor the flow rate L3 of the water inlet (2); as well as A water level detector, which is arranged in the filter barrel (7) and is used to monitor the water level H in the filter barrel (7); The controller is also used to: when it is detected that the difference between the flow rate L2 and the flow rate L3 exceeds the preset flow difference value 2 for a preset time period, determine whether the growth rate of the water level H exceeds the preset range; if so, control the alarm to send an abnormal signal at the water outlet of the filter barrel (7); otherwise, control the alarm to send an abnormal signal at the water inlet of the filter barrel (7).

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