A multi-pond artificial wetland sewage treatment system

Abstract

The present invention relates to the technical field related to sewage treatment, and discloses a multi-pond artificial wetland sewage treatment system, comprising a pretreatment tank, a water inlet mechanism; further comprising a filter screen, a flocculation mixing and filter pressing mechanism, an automatic reset cleaning mechanism, a transmission mechanism and a collection box; wherein the flocculation mixing and filter pressing mechanism comprises a flocculation adding module and a driving module; thereby, flocculants and large-volume impurities in the sewage are collected in a centralized manner and cleaned up in a timely manner, thereby improving the sewage pretreatment efficiency without consuming a large amount of time for static sedimentation, and without consuming manpower and material resources to clean up the accumulated debris in the later stage, and avoiding the instability of fixed-point cleaning of large-volume impurities, thereby effectively improving the treatment efficiency of sewage pretreatment.

Description

Technical Field

[0001] The present invention relates to the technical field related to sewage treatment, and in particular to a multi-pond artificial wetland sewage treatment system. Background Art

[0002] Multi-pond artificial wetland is a wastewater purification technology that simulates the natural wetland ecosystem. It uses multiple ponds (treatment units) connected in series or parallel to remove pollutants from water bodies through the synergistic effects of physical, chemical and biological processes.

[0003] It combines the advantages of artificial wetlands and stabilization ponds and is an efficient, low-cost ecological sewage treatment system. It includes pre-treatment units such as sedimentation tanks, main treatment units such as plant ponds, and deep treatment and ecological units including ecological ponds. Through the "natural simulation + engineering optimization" design, it shows unique value in sewage treatment and ecological restoration, and is an important technical choice under the concept of sustainable development.

[0004] The pretreatment unit of the existing sewage treatment system usually uses screens and sedimentation tanks for preliminary sewage impurity cleaning. The intercepted impurities cannot be cleaned in time, which reduces the pretreatment efficiency. The sedimentation tank also takes a lot of time to stand. The accumulated debris and sediment then require manpower and material resources to operate and clean. Even if an impurity conveyor is used in the screen area to remove large-volume impurities in the sewage, the impurity conveyor can only be a fixed-point random transport and cannot perform sufficient and effective preliminary cleaning of impurities in the sewage. Summary of the Invention

[0005] The object of the present invention is to provide a multi-pond artificial wetland sewage treatment system to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0007] An embodiment of the present invention provides a multi-pond artificial wetland sewage treatment system, comprising a pretreatment tank and a water inlet mechanism provided on the pretreatment tank; and further comprising:

[0008] The filter is fixedly arranged on the inner wall of the pretreatment tank and is located between the water inlet mechanism and the inner wall of the bottom of the pretreatment tank;

[0009] The flocculation mixing filter press mechanism is set between the filter screen and the top of the pretreatment tank, and is used for flocculation treatment of sewage impurities and pressure filtration at the same time;

[0010] The automatic reset cleaning mechanism is arranged on the side wall of the pretreatment tank and is located between the flocculation mixing and filtration mechanism and the filter screen;

[0011] The transmission mechanism is provided on the side wall of the pretreatment tank and is located between the flocculation mixing and filtration pressing mechanism and the automatic reset cleaning mechanism, and is used to intermittently convert the driving force of the flocculation mixing and filtration pressing mechanism into the cleaning driving force of the automatic reset cleaning mechanism;

[0012] A collection box, fixedly connected to the side wall of the pretreatment tank;

[0013] Wherein, the flocculation mixing and filtration mechanism includes:

[0014] The flocculation addition module is slidably arranged on the inner wall of the pretreatment tank, and is used to intermittently control the water inlet mechanism and provide flocculants at the same time;

[0015] A driving module is provided on the top wall of the pretreatment tank, and is used to provide a reciprocating driving force while controlling the flocculation adding module;

[0016] Wherein, the transmission mechanism is arranged between the automatic reset cleaning mechanism and the driving module.

[0017] Furthermore, the flocculation addition module includes:

[0018] The storage frame is slidingly fitted with damping on the inner wall of the pretreatment tank;

[0019] There is at least one set of input ports, which are opened at the bottom of the storage frame;

[0020] The input drive unit corresponds to the input port one by one, is elastically slidably arranged on the storage frame, and is located on the moving track of the drive module, and is used to control the opening and closing of the input port;

[0021] The driving module is slidingly arranged on the side wall of the storage frame with damping; the sliding friction between the driving module and the side wall of the storage frame is smaller than the sliding friction between the storage frame and the side wall of the pretreatment tank.

[0022] Furthermore, the driving module includes:

[0023] A telescopic driving member is fixedly arranged on the top of the pretreatment tank;

[0024] The lower pressure plate is arranged on the inner wall of the pretreatment tank in a sliding manner, and the slide with damping is arranged in the sliding guide groove;

[0025] The sliding friction between the lower pressing plate and the sliding guide groove is smaller than the sliding friction between the storage frame and the side wall of the pretreatment tank; the lower pressing plate is fixedly arranged on the telescopic end of the telescopic driving member;

[0026] When the telescopic driving member is at the minimum stroke position, the transmission mechanism and the lower pressure plate are in a compressed state with an interaction force;

[0027] When the telescopic driving member is at the maximum stroke position, the transmission mechanism and the lower pressing plate are in a state of no interaction force;

[0028] When the telescopic driving member is in a state of driving the lower pressing plate to press downward, no power is transmitted between the transmission mechanism and the lower pressing plate, and the transmission mechanism is in an automatic elastic reset state;

[0029] When the telescopic driving member is in a state of driving the lower pressing plate to move upward, and there is no interaction force between the transmission mechanism and the lower pressing plate, there is no power transmission between the transmission mechanism and the lower pressing plate, and the automatic reset cleaning mechanism is in a static state;

[0030] When the telescopic driving member is in a state of driving the lower pressure plate to move upward, and there is an interaction force between the transmission mechanism and the lower pressure plate, there is a power transmission state between the transmission mechanism and the lower pressure plate, and the automatic reset cleaning mechanism is in a working state.

[0031] Furthermore, a first mounting frame is fixedly provided on the top of the pretreatment tank, a second mounting frame is fixedly provided on the outer side wall of the pretreatment tank, a first support mounting plate is fixedly provided between the top of the first mounting frame and the top of the pretreatment tank, a second support mounting plate is fixedly provided between the second mounting frame and the outer side wall of the pretreatment tank, a lifting avoidance groove is provided on the top of the pretreatment tank, and the transmission mechanism includes:

[0032] A transmission pressure plate is slidably arranged on the inner wall of the pretreatment tank;

[0033] The transmission driving plate is fixedly arranged on the transmission pressure plate at the bottom and is slidably arranged in the lifting avoidance groove;

[0034] A plurality of reset drive springs are evenly arranged between the transmission pressure plate and the top inner wall of the pretreatment tank;

[0035] A transmission shaft is rotatably mounted on the first support mounting plate and the side wall of the first mounting frame;

[0036] A transition shaft is rotatably disposed on the first support mounting plate, the first mounting frame side wall, and the second mounting frame side wall;

[0037] A driving shaft is rotatably mounted on the second supporting mounting plate;

[0038] Among them, the transmission drive plate and the transmission shaft are connected through a gear rack pair, the transmission shaft and the transition shaft are connected through a gear pair, the transition shaft and the driving shaft are connected through a bevel gear pair, and the driving shaft and the automatic reset cleaning mechanism are connected through a gear rack pair.

[0039] Furthermore, the automatic reset cleaning mechanism includes:

[0040] Clean the mounting plate and fix it on the outer wall of the pretreatment tank and the inner wall of the second mounting frame;

[0041] Cleaning drive rod, the sealing slide is set on the side wall of the pretreatment tank;

[0042] An automatic reset drive module is elastically slidably arranged on the cleaning mounting plate;

[0043] An elastic cleaning module is fixedly arranged at the end of a cleaning drive rod located in the pretreatment tank;

[0044] The displacement drive module is slidably arranged on the cleaning mounting plate and is used to provide a unidirectional driving force for the automatic reset drive module;

[0045] The end of the cleaning drive rod away from the elastic cleaning module is fixedly arranged on the automatic reset drive module; the displacement drive module is connected to the drive shaft through a gear rack pair;

[0046] When the elastic cleaning module is in a state of moving from bottom to top along the inclined surface of the filter screen, the elastic cleaning module is in a state of always being in contact with the upper surface of the filter screen.

[0047] Furthermore, the cleaning installation plate is provided with an automatic reset chute, and the automatic reset drive module includes:

[0048] An automatic reset slider is slidably arranged in an automatic reset slide groove;

[0049] The positioning moving block is elastically slidably arranged on the automatic reset slider;

[0050] An automatic reset spring is fixedly connected between the automatic reset slider on the side away from the cleaning drive rod and the inner side wall of the second mounting frame;

[0051] Among them, the sliding trajectory between the positioning moving block and the automatic reset slider and the moving trajectory of the automatic reset slider are in a perpendicular state to each other in space; the end of the cleaning drive rod away from the elastic cleaning module is fixedly set on the automatic reset slider, and the displacement drive module is set between the positioning moving block and the driving shaft.

[0052] Furthermore, a displacement slide is provided on the cleaning mounting plate, and the displacement drive module includes:

[0053] A shift driving rod is slidably arranged in the shift sliding groove;

[0054] The fitting drive unit is fixedly arranged on the side wall of the displacement drive rod facing the positioning moving block;

[0055] The unlocking mounting rod is fixedly arranged on the cleaning mounting plate between the shifting chute and the automatic reset chute;

[0056] The unlocking drive block is fixedly arranged on the top of the unlocking mounting rod, and the side surface facing the locking moving block is inclined;

[0057] Among them, the driving shaft and the shifting driving rod are connected by a gear rack pair; the locking moving block is located on the moving trajectory of the fitting driving unit; the unlocking driving block is located on the moving trajectory of the locking moving block, and the inclined surface of the unlocking driving block faces the side of the cleaning driving rod; the side surface of the locking moving block facing the side of the unlocking driving block is set as an inclined surface; the unlocking driving block and the unlocking mounting rod are both away from the moving trajectory of the fitting driving unit.

[0058] Furthermore, the fitting drive unit includes:

[0059] The mounting plate is fitted and fixed on the side wall of the shifting drive rod;

[0060] The fitting connecting column is fixedly arranged on the fitting mounting plate;

[0061] A fitting wheel is rotatably arranged on the fitting connecting column;

[0062] The positioning moving block is located on the moving track of the fitting rotating wheel, and the unlocking driving block and the unlocking mounting rod are both away from the moving tracks of the fitting rotating wheel and the fitting mounting plate.

[0063] Furthermore, the elastic cleaning module includes:

[0064] A cleaning positioning plate is fixedly arranged on the end of the cleaning drive rod located in the pretreatment tank;

[0065] A cleaning scraper is elastically slidably arranged in the cleaning positioning plate;

[0066] When the cleaning scraper moves from bottom to top along the inclined surface of the filter screen, the bottom of the cleaning scraper is always in contact with the upper surface of the filter screen.

[0067] Furthermore, the system also includes an automatic protection mechanism, a collection port is provided at the connection between the collection box and the pretreatment tank, and the automatic protection mechanism includes:

[0068] A protective door with damping elastic sliding is set on the inner wall of the collection box and is used to close the collection port;

[0069] The push rod is fixedly arranged on the cleaning positioning plate and corresponds to the protective door;

[0070] Wherein, the pushing rod is embedded and slidably arranged on the inner wall of the pretreatment tank.

[0071] The above solution of the present invention includes at least the following beneficial effects:

[0072] By setting the continuously added flocculant and the continuously incoming sewage in a state of mutual collision, the flocculant is uniformly integrated with the sewage, and the mixing of the flocculant and sewage is dynamically promoted through the fluidity of the sewage, thereby improving the flocculation effect of sewage pretreatment, and the flocculants and large-volume impurities in the sewage fall on the filter screen at the same time. Subsequently, the driving module is pressed down while controlling the flocculation addition module to close the water inlet mechanism, providing reaction and filtration separation time for the sewage in the pretreatment tank and the flocculants and large-volume impurities in the sewage, while pressing the flocculants and large-volume impurities in the sewage to speed up the separation time of the flocculants and large-volume impurities in the sewage, thereby improving the efficiency of sewage pretreatment. During this process, the automatic reset cleaning mechanism is in a stationary state, and there is no power transmission between the driving module and the transmission mechanism. After the driving module completes a pressing and holding, it rises in the reverse direction to a moving trajectory away from the automatic reset cleaning mechanism, and the driving module passes The automatic reset cleaning mechanism is controlled by the transmission mechanism to start and scrape the flocculants and large-volume impurities on the filter screen into the collection box. Then, the automatic reset cleaning mechanism and the transmission mechanism release the interaction force and the automatic reset cleaning mechanism automatically resets. During this process, the flocculation adding module is always in the closed water inlet mechanism state, and the driving module continues to rise to drive the flocculation adding module to release the closure of the water inlet mechanism. This cycle is repeated. After intermittently controlling the amount of sewage entering, the incoming sewage is fully dynamically mixed and pressure-held with the flocculant in combination with the sewage flow characteristics, so that the flocculants and large-volume impurities in the sewage are collected and cleaned in time, thereby improving the sewage pretreatment efficiency without spending a lot of time on static sedimentation, and without spending manpower and material resources to clean up the accumulated debris in the later stage, and avoiding the instability of fixed-point cleaning of large-volume impurities, thereby effectively improving the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 A schematic diagram of the overall three-dimensional structure of a multi-pond artificial wetland sewage treatment system provided by an embodiment of the present invention;

[0074] Figure 2 Provided in the embodiments of the present invention Figure 1 Schematic diagram of the three-dimensional structure at A in the middle;

[0075] Figure 3 A schematic diagram of the three-dimensional structure of an internal cross-sectional view of the overall structure of an embodiment of the present invention;

[0076] Figure 4 Schematic diagram of the three-dimensional structure inside the first installation frame in an embodiment of the present invention;

[0077] Figure 5 Schematic diagram of the three-dimensional structure of the automatic reset drive module in the embodiment of the present invention Figure 1 ;

[0078] Figure 6 Provided in the embodiments of the present invention Figure 5 Schematic diagram of the three-dimensional structure at B in the middle;

[0079] Figure 7 Schematic diagram of the three-dimensional structure of the automatic reset drive module in the embodiment of the present invention Figure 2 ;

[0080] Figure 8 A schematic diagram of a partial three-dimensional structure of an input drive unit in an embodiment of the present invention;

[0081] Figure 9 Schematic diagram of the three-dimensional structure inside the pretreatment tank in an embodiment of the present invention.

[0082] Description of reference numerals:

[0083] Figure: 1, pretreatment tank; 2, filter screen; 3, drainage pipe; 4, collection box; 5, water inlet; 6, water inlet pipe; 7, water inlet baffle; 8, positioning movable groove; 9, positioning mounting rod; 10, positioning clamp; 11, positioning seat; 12, storage frame; 13, sliding guide groove; 14, delivery reset rod; 15, opening and closing baffle; 16, telescopic drive member; 17, lower pressure plate; 18, dosing pipe; 19, first installation frame; 20, second installation frame; 2 1. Transmission pressure plate; 22. Transmission drive plate; 23. Reset drive spring; 24. Transmission shaft; 25. Transition shaft; 26. Drive shaft; 27. Cleaning mounting plate; 28. Cleaning drive rod; 29. ​​Automatic reset slider; 30. Positioning moving block; 31. Automatic reset spring; 32. Displacement drive rod; 33. Unlocking drive block; 34. Fitting wheel; 35. Cleaning positioning plate; 36. Cleaning scraper; 37. Protective door; 38. Push rod. DETAILED DESCRIPTION

[0084] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0085] like Figures 1 to 9 As shown, a multi-pond artificial wetland sewage treatment system includes a pretreatment tank 1 and a water inlet mechanism provided on the pretreatment tank 1; and further includes:

[0086] The filter screen 2 is fixedly arranged on the inner wall of the pretreatment tank 1 and is located between the water inlet mechanism and the inner wall of the bottom of the pretreatment tank 1;

[0087] The flocculation mixing filter press mechanism is arranged between the filter screen 2 and the top of the pretreatment tank 1, and is used for flocculation treatment of sewage impurities while performing pressure filtration;

[0088] The automatic reset cleaning mechanism is provided on the side wall of the pretreatment tank 1 and is located between the flocculation mixing and filtration mechanism and the filter screen 2, and is used to clean impurities on the filter screen 2;

[0089] The transmission mechanism is provided on the side wall of the pretreatment tank 1 and is located between the flocculation mixing and filtration pressing mechanism and the automatic reset cleaning mechanism, and is used to intermittently convert the driving force of the flocculation mixing and filtration pressing mechanism into the cleaning driving force of the automatic reset cleaning mechanism;

[0090] The collecting box 4 is fixedly connected to the side wall of the pretreatment tank 1 away from the automatic reset cleaning mechanism;

[0091] Wherein, the flocculation mixing and filtration mechanism includes:

[0092] The flocculation adding module is slidably arranged on the inner wall of the pretreatment tank 1 and is used to intermittently control the water inlet mechanism and provide flocculants;

[0093] A driving module is provided on the top wall of the pretreatment tank 1 and is used to provide a reciprocating driving force while controlling the flocculation adding module;

[0094] The flocculation adding module is located between the top wall of the pretreatment tank 1 and the water inlet mechanism, and the transmission mechanism is arranged between the automatic reset cleaning mechanism and the driving module.

[0095] Specifically, the system further includes a drainage pipe 3, which is fixedly connected to the pretreatment tank 1 and is located between the filter 2 and the bottom inner wall of the pretreatment tank 1, and is used for discharging pretreated sewage.

[0096] More specifically, the filter screen 2 can be a metal filter screen, a filter cloth, or a screen, as long as it can achieve fine filtration for sewage pretreatment.

[0097] Furthermore, in order to fully utilize the flow characteristics of sewage, the filter screen 2 is tilted with the lower end facing the automatic reset cleaning mechanism.

[0098] 2 and 3. The flocculation adding module is used to add the flocculant to the pretreatment tank 1, and the flocculation adding module is used to add the flocculant to the pretreatment tank 1. There is no power transmission between the driving mechanisms. After the driving module completes a pressing and holding operation and rises in the reverse direction to a moving trajectory away from the automatic reset cleaning mechanism, the driving module controls the automatic reset cleaning mechanism to start through the transmission mechanism and scrapes and cleans the flocculants and large-volume impurities on the filter screen 2 into the collection box 4. Subsequently, the automatic reset cleaning mechanism and the transmission mechanism release the interaction force and the automatic reset cleaning mechanism automatically resets. During this process, the flocculation adding module is always in the closed water inlet mechanism state. The driving module continues to rise and drives the flocculation adding module to release the closure of the water inlet mechanism. This cycle is repeated. After intermittently controlling the amount of sewage entering, the incoming sewage is fully dynamically mixed and pressed with the flocculant in combination with the flow characteristics of the sewage, so that the flocculants and large-volume impurities in the sewage are collected and cleaned in time, thereby improving the sewage pretreatment efficiency without spending a lot of time on static sedimentation, and without spending manpower and material resources to operate and clean the accumulated debris in the later stage, and avoiding the instability of fixed-point cleaning of large-volume impurities, thereby effectively improving the sewage treatment efficiency. It should be noted here that although traditional multi-pond artificial wetlands rely on natural purification, chemical assistance can also be used as a supplementary means to assist in adding flocculants to improve sewage treatment efficiency, so that suspended particles and colloidal pollutants in the water can aggregate into larger flocs, thereby accelerating flocculation, sedimentation, filtration and removal.

[0099] As a preferred embodiment of the present invention, the water inlet mechanism includes:

[0100] The water inlet 5 is opened on the side wall of the pretreatment tank 1;

[0101] The water inlet pipe 6 is fixedly arranged on the outer wall of the pretreatment tank 1 and is connected to the water inlet 5;

[0102] The water inlet baffle 7 is slidably arranged on the side wall of the pretreatment tank 1 and is used to close the water inlet 5 and the water inlet pipe 6;

[0103] A positioning module is provided between the water inlet baffle 7 and the outer wall of the pretreatment tank 1 and is used for moving and positioning the water inlet baffle 7;

[0104] The water inlet 5 is opened between the filter screen 2 and the flocculation adding module, and is located on the high end side of the filter screen 2.

[0105] Specifically, a positioning movement groove 8 is provided on the side wall of the pretreatment tank 1 just above the water inlet 5, and the positioning module includes:

[0106] The positioning mounting rod 9 is fixedly arranged on the side wall of the water inlet baffle 7 and slidably arranged in the positioning movable groove 8;

[0107] A positioning clamp ring 10 is fixedly mounted on the end of a positioning mounting rod 9 located outside the side wall of the pretreatment tank 1;

[0108] The positioning seat 11 is fixedly arranged on the outer wall of the pretreatment tank 1 and is located directly above the positioning clamp ring 10;

[0109] The positioning groove is formed on the positioning seat 11 and is used for locking and positioning the snap ring 10 .

[0110] In actual application of this embodiment, by setting the water inlet baffle 7 and the mutual cooperation of the positioning clip 10 and the positioning groove, when sewage pretreatment is required, the staff drives the positioning clip 10 to engage in the positioning groove, thereby moving the water inlet baffle 7 upward to achieve mutual communication between the water inlet 5 and the water inlet pipe 6, and then the sewage enters the pretreatment tank 1 through the water inlet 5.

[0111] As a preferred embodiment of the present invention, the flocculation addition module includes:

[0112] The storage frame 12 is provided on the inner wall of the pretreatment tank 1 in a sliding manner with damping;

[0113] At least one set of input ports is provided at the bottom of the storage frame 12;

[0114] The input drive unit corresponds to the input port one by one, is elastically slidably arranged on the storage frame 12, and is located on the moving track of the drive module, and is used to control the opening and closing of the input port;

[0115] Among them, the driving module is provided with a damped slide on the side wall of the storage frame 12 away from the inner wall of the pretreatment tank 1, and the storage frame 12 and the water inlet 5 are located on the same side of the pretreatment tank 1; the sliding friction between the driving module and the side wall of the storage frame 12 is smaller than the sliding friction between the storage frame 12 and the side wall of the pretreatment tank 1.

[0116] Specifically, the input drive unit includes:

[0117] The sliding guide groove 13 is provided on the outer wall of the storage frame 12 near the driving module side;

[0118] The feeding reset lever 14 corresponds to the feeding port and is elastically slidably arranged at the bottom of the storage frame 12 and is located on the lower side wall of the sliding guide groove 13;

[0119] The opening and closing baffle 15 is fixedly arranged at the bottom end of the feeding reset rod 14 on the outside of the bottom of the storage frame 12 and is located directly below the feeding port;

[0120] The driving module is provided with a damped slide in the sliding guide groove 13, and the delivery reset rod 14 is located on the moving track of the driving module;

[0121] When the feeding reset rod 14 is in a state without being acted upon by an external force, the opening and closing baffle 15 is in a state of closing the feeding port;

[0122] When the dropping-in reset lever 14 is in a state of being acted upon by an external force, the opening and closing baffle 15 is in a state of being away from the dropping-in port.

[0123] In detail, the sliding connection between the delivery reset rod 14 and the storage frame 12 is elastically connected by a spring, so that the delivery reset rod 14 is elastically slidably set on the storage frame 12 so that the delivery reset rod 14 drives the opening and closing baffle 15 to open and automatically close the delivery port, thereby controlling the addition of flocculant.

[0124] Furthermore, in order to facilitate the addition of flocculant into the storage frame 12, a dosing pipe 18 is fixedly connected to the upper side wall of the storage frame 12, and a movable avoidance groove is opened on the side wall of the pretreatment tank 1 close to the dosing pipe 18, and the dosing pipe 18 is slidably set in the movable avoidance groove.

[0125] During actual application of this embodiment, by arranging the storage frame 12 and the water inlet 5 to be located on the same side of the pretreatment tank 1, and the sliding friction between the driving module and the side wall of the storage frame 12 is smaller than the sliding friction between the storage frame 12 and the side wall of the pretreatment tank 1, the driving module preferentially drives the injection reset rod 14 to drive the opening and closing baffle 15 to open the injection port to inject flocculant into the pretreatment tank 1, and then the driving module drives the storage frame 12 to close the water inlet 5. That is to say, while achieving intermittent closure of the water inlet 5 to facilitate downward pressure filtration and separation pretreatment of the sewage in the pretreatment tank 1, the flow characteristics of the sewage are fully utilized to dynamically mix with the flocculant to improve the effect of flocculation and sewage filtration and separation pretreatment.

[0126] As a preferred embodiment of the present invention, the driving module includes:

[0127] The telescopic driving member 16 is fixedly arranged on the top of the pretreatment tank 1;

[0128] The lower pressing plate 17 is slidably arranged on the inner wall of the pretreatment tank 1 and is slidably arranged in the sliding guide groove 13 with damping;

[0129] The sliding friction between the lower pressing plate 17 and the sliding guide groove 13 is smaller than the sliding friction between the storage frame 12 and the side wall of the pretreatment tank 1; the lower pressing plate 17 is fixedly arranged on the telescopic end of the telescopic driving member 16, and the delivery reset rod 14 is located on the moving track of the lower pressing plate 17;

[0130] When the telescopic driving member 16 is at the minimum stroke position, the transmission mechanism and the lower pressing plate 17 are in a compressed state with an interaction force;

[0131] When the telescopic driving member 16 is at the maximum stroke position, there is no interaction force between the transmission mechanism and the lower pressing plate 17;

[0132] When the telescopic driving member 16 is in the state of driving the lower pressing plate 17 to press downward, no power is transmitted between the transmission mechanism and the lower pressing plate 17, and the transmission mechanism is in an automatic elastic reset state;

[0133] When the telescopic driving member 16 is in a state of driving the lower pressing plate 17 to move upward, and there is no interaction force between the transmission mechanism and the lower pressing plate 17, there is no power transmission between the transmission mechanism and the lower pressing plate 17, and the automatic reset cleaning mechanism is in a static state;

[0134] When the telescopic driving member 16 is in the state of driving the lower pressure plate 17 to move upward, and there is an interaction force between the transmission mechanism and the lower pressure plate 17, there is a power transmission state between the transmission mechanism and the lower pressure plate 17, and the automatic reset cleaning mechanism is in a working state.

[0135] Specifically, the telescopic driving member 16 can be a driving cylinder, a hydraulic cylinder, or an electric push rod. This embodiment does not impose any specific restrictions, as long as it can provide the telescopic driving force.

[0136] More specifically, in order to ensure effective pressing of the lower pressing plate 17 , the lower pressing plate 17 is arranged to slide obliquely on the inner wall of the pretreatment tank 1 , and has the same inclination angle and inclination direction as the filter screen 2 .

[0137] When the hopper 16 is in the closed position, the hopper 16 is in the closed position, and the hopper 16 is in the closed position, so that the hopper 16 is in the closed position, and the hopper 16 is in the closed position, so that the hopper 16 is in the closed position, and the hopper 16 is in the closed position, so that the hopper 16 is in the closed position, and the hopper 16 is in the closed position, so that the hopper 16 is in the closed position, and the hopper 16 is in the closed position, so that the hopper 16 is in the closed position, so that the hopper 16 is in the closed position, and the hopper 16 is in the closed position, so that the hopper 16 is in the closed position, so that the hopper 16 is in the closed position,

[0138] Subsequently, the telescopic driving member 16 is in a state of driving the lower pressure plate 17 to move upward, and when there is no interaction force between the transmission mechanism and the lower pressure plate 17, there is no power transmission between the transmission mechanism and the lower pressure plate 17, and the automatic reset cleaning mechanism is in a stationary state, that is, at this time the lower pressure plate 17 is in a state of being away from the moving track of the automatic reset cleaning mechanism to avoid mutual interference with the automatic reset cleaning mechanism. At this time, since the sliding friction between the lower pressure plate 17 and the sliding guide groove 13 is less than the sliding friction between the storage frame 12 and the side wall of the pretreatment tank 1, the lower pressure plate 17 preferentially moves away from the delivery reset rod 14 and drives the opening and closing baffle 15 to automatically reset to close the inlet and stop the delivery of flocculant;

[0139] Finally, the telescopic driving member 16 is in a state of driving the lower pressure plate 17 to move upward, and when there is an interaction force between the transmission mechanism and the lower pressure plate 17, there is a power transmission state between the transmission mechanism and the lower pressure plate 17 to drive the automatic reset cleaning mechanism to scrape and clean the flocculants and large-volume impurities on the filter 2 into the collection box 4. Then, the automatic reset cleaning mechanism and the transmission mechanism release the interaction force and the automatic reset cleaning mechanism automatically resets, and the lower pressure plate 17 continues to move upward to drive the storage frame 12 to move upward to open the water inlet 5 and let the sewage to be pretreated enter the pretreatment tank 1 again, and this cycle repeats.

[0140] As a preferred embodiment of the present invention, a first mounting frame 19 is fixedly provided on the top of the pretreatment tank 1, and a second mounting frame 20 is fixedly provided on the outer side wall of the pretreatment tank 1 away from the collecting box 4. A first supporting mounting plate is fixedly provided between the top of the first mounting frame 19 and the top of the pretreatment tank 1, and a second supporting mounting plate is fixedly provided between the second mounting frame 20 and the outer side wall of the pretreatment tank 1. At least one group of the second supporting mounting plates is provided, and a lifting avoidance groove is provided on the top of the pretreatment tank 1. The transmission mechanism includes:

[0141] The transmission pressure plate 21 is slidably arranged on the inner wall of the pretreatment tank 1;

[0142] The transmission driving plate 22 is fixedly mounted on the transmission pressure plate 21 at its bottom and is slidably mounted in the lifting avoidance groove;

[0143] A plurality of reset drive springs 23 are evenly arranged between the transmission pressure plate 21 and the top inner wall of the pretreatment tank 1;

[0144] The transmission shaft 24 is rotatably mounted on the first support mounting plate and the side wall of the first mounting frame 19;

[0145] The transition shaft 25 is rotatably mounted on the first support mounting plate, the side wall of the first mounting frame 19 and the side wall of the second mounting frame 20;

[0146] The driving shaft 26 is rotatably mounted on the second supporting mounting plate;

[0147] Among them, the transmission drive plate 22 and the transmission shaft 24 are connected through a gear rack pair, the transmission shaft 24 and the transition shaft 25 are connected through a gear pair, the transition shaft 25 and the drive shaft 26 are connected through a bevel gear pair, and the drive shaft 26 and the automatic reset cleaning mechanism are connected through a gear rack pair.

[0148] When the telescopic driving member 16 is at the minimum stroke position, there is an interaction force between the transmission pressure plate 21 and the lower pressure plate 17, and the return driving spring 23 is in a compressed state;

[0149] When the telescopic driving member 16 is at the maximum stroke position, there is no interaction force between the transmission pressure plate 21 and the lower pressure plate 17;

[0150] When the telescopic driving member 16 is in the state of driving the lower pressing plate 17 to press downward, no power is transmitted between the transmission pressure plate 21 and the lower pressing plate 17, and the transmission pressure plate 21 is in an automatic elastic reset state;

[0151] When the telescopic driving member 16 is in a state of driving the lower pressure plate 17 to move upward, and there is no interaction force between the transmission pressure plate 21 and the lower pressure plate 17, there is no power transmission between the transmission pressure plate 21 and the lower pressure plate 17, and the automatic reset cleaning mechanism is in a static state;

[0152] When the telescopic driving member 16 is in the state of driving the lower pressure plate 17 to move upward, and there is an interaction force between the transmission pressure plate 21 and the lower pressure plate 17, there is a power transmission state between the transmission pressure plate 21 and the lower pressure plate 17, and the automatic reset cleaning mechanism is in a working state.

[0153] The gear rack and pinion transmission connection between the transmission driving plate 22 and the transmission shaft 24, the gear pair transmission connection between the transmission shaft 24 and the transition shaft 25, the bevel gear pair transmission connection between the transition shaft 25 and the driving shaft 26, and the gear rack and pinion transmission connection between the driving shaft 26 and the automatic reset cleaning mechanism provide displacement driving force for the automatic reset cleaning mechanism, while there is no power transmission between the lower pressure plate 17 and the automatic reset cleaning mechanism, that is, the automatic reset cleaning mechanism is in a stationary state at this time;

[0154] Subsequently, the telescopic driving member 16 is in a state of driving the lower pressure plate 17 to move upward, and there is no interaction force between the transmission pressure plate 21 and the lower pressure plate 17, that is, at this time, there is no power transmission between the transmission pressure plate 21 and the lower pressure plate 17, the reset driving spring 23 is in a natural equilibrium state, and the transmission pressure plate 21 and the automatic reset cleaning mechanism are both in a stationary state;

[0155] When the telescopic driving member 16 is in the state of driving the lower pressure plate 17 to move upward, and the lower pressure plate 17 touches the transmission pressure plate 21, the lower pressure plate 17 drives the transmission pressure plate 21 to move upward, and then under the joint action of the transmission connection of the gear rack pair between the transmission driving plate 22 and the transmission shaft 24, the gear pair transmission connection between the transmission shaft 24 and the transition shaft 25, the bevel gear pair transmission connection between the transition shaft 25 and the driving shaft 26, and the gear rack pair transmission connection between the driving shaft 26 and the automatic reset cleaning mechanism, the automatic reset cleaning is achieved. The mechanism provides a cleaning driving force, that is, the automatic reset cleaning mechanism is in working state at this time, thereby scraping and cleaning the flocculants and large-volume impurities on the filter screen 2 into the collection box 4, and then the automatic reset cleaning mechanism and the driving shaft 26 release the interaction force and the automatic reset cleaning mechanism automatically resets. During this process, the storage frame 12 is always in a closed water inlet 5 state, and then the lower pressure plate 17 continues to move upward to drive the storage frame 12 to move upward to open the water inlet 5 and again enter the sewage to be pretreated into the pretreatment tank 1, and this cycle is repeated.

[0156] As a preferred embodiment of the present invention, the automatic reset cleaning mechanism includes:

[0157] Cleaning mounting plate 27, fixedly mounted on the outer wall of pretreatment tank 1 and the inner wall of second mounting frame 20;

[0158] The cleaning drive rod 28 is sealingly and slidingly arranged on the side wall of the pretreatment tank 1;

[0159] Automatic reset drive module, elastically slidably arranged on the cleaning mounting plate 27;

[0160] The elastic cleaning module is fixedly arranged at the end of the cleaning driving rod 28 located in the pretreatment tank 1;

[0161] The displacement drive module is slidably disposed on the cleaning mounting plate 27 and is used to provide a unidirectional driving force for the automatic reset drive module;

[0162] The end of the cleaning drive rod 28 away from the elastic cleaning module is fixedly arranged on the automatic reset drive module; the displacement drive module is connected to the drive shaft 26 through a gear rack pair;

[0163] When the elastic cleaning module is in a state of moving from bottom to top along the inclined surface of the filter screen 2 , the elastic cleaning module and the upper surface of the filter screen 2 are always in contact with each other.

[0164] During actual application of this embodiment, when the transmission pressure plate 21 is in a downward state, through the transmission connection of the gear rack pair between the transmission drive plate 22 and the transmission shaft 24, the gear pair transmission connection between the transmission shaft 24 and the transition shaft 25, the bevel gear pair transmission connection between the transition shaft 25 and the driving shaft 26, and the gear rack pair transmission connection between the driving shaft 26 and the displacement driving module, the driving shaft 26 converts the power into a reciprocating lateral movement force of the displacement driving module through the gear rack pair, driving the displacement driving module to move in a direction away from the pretreatment tank 1, and at this time there is no conversion of lateral driving force between the displacement driving module and the automatic reset driving module, that is, the automatic reset driving module is in a stationary state at this time;

[0165] Subsequently, the telescopic driving member 16 is in a state of driving the lower pressure plate 17 to move upward, and there is no interaction force between the transmission pressure plate 21 and the lower pressure plate 17, that is, at this time, there is no power transmission between the transmission pressure plate 21 and the lower pressure plate 17, the reset driving spring 23 is in a natural equilibrium state, the transmission pressure plate 21 is in a stationary state, and the automatic reset driving module is also in a stationary state;

[0166] When the telescopic driving member 16 is in the state of driving the lower pressure plate 17 to move upward, and after the lower pressure plate 17 touches the transmission pressure plate 21, the lower pressure plate 17 drives the transmission pressure plate 21 to move upward. At this time, the lower pressure plate 17 is away from the moving track of the elastic cleaning module. Then, under the joint action of the transmission connection of the gear rack pair between the transmission driving plate 22 and the transmission shaft 24, the gear pair transmission connection between the transmission shaft 24 and the transition shaft 25, the bevel gear pair transmission connection between the transition shaft 25 and the driving shaft 26, and the gear rack pair transmission connection between the driving shaft 26 and the displacement driving module, the displacement driving module is driven to move in the opposite direction toward the pretreatment tank 1. At this time, the displacement driving module and the automatic repeating There is an interaction force between the position drive modules, that is, the displacement drive module synchronously drives the automatic reset drive module to move toward the direction close to the pretreatment tank 1, and then drives the elastic cleaning module through the cleaning drive rod 28 to scrape and clean the flocculants and large-volume impurities on the filter 2 into the collection box 4. Then, under the action of the displacement drive module, the automatic reset drive module and the displacement drive module release the interaction force, and then the automatic reset drive module automatically resets. During this process, the storage frame 12 is always in a closed water inlet 5 state, and then the lower pressure plate 17 continues to move upward to drive the storage frame 12 to move upward to open the water inlet 5 and let the sewage to be pretreated enter the pretreatment tank 1 again, and this cycle repeats.

[0167] As a preferred embodiment of the present invention, the cleaning mounting plate 27 is provided with an automatic reset chute, and the automatic reset drive module includes:

[0168] Automatic reset slider 29, slidably disposed in the automatic reset chute;

[0169] The positioning moving block 30 is elastically slidably arranged on the automatic reset slider 29;

[0170] An automatic return spring 31 is fixedly connected between the automatic return slider 29 on the side away from the cleaning drive rod 28 and the inner wall of the second mounting frame 20;

[0171] Among them, the sliding trajectory between the positioning moving block 30 and the automatic reset slider 29 and the moving trajectory of the automatic reset slider 29 are in a perpendicular state to each other in space; the end of the cleaning drive rod 28 away from the elastic cleaning module is fixedly set on the automatic reset slider 29, and the displacement drive module is set between the positioning moving block 30 and the driving shaft 26.

[0172] Specifically, the sliding connection between the positioning moving block 30 and the automatic reset slider 29 is elastically connected via a spring, thereby achieving elastic sliding between the positioning moving block 30 and the automatic reset slider 29 .

[0173] In actual application of this embodiment, under the action of the gear rack pair, the driving shaft 26 drives the displacement driving module to move in a direction away from the pretreatment tank 1. At this time, there is no conversion of lateral driving force between the displacement driving module and the positioning moving block 30, that is, the positioning moving block 30 is in a stationary state at this time;

[0174] Subsequently, the telescopic driving member 16 is in a state of driving the lower pressure plate 17 to move upward, and there is no interaction force between the transmission pressure plate 21 and the lower pressure plate 17, that is, at this time, there is no power transmission between the transmission pressure plate 21 and the lower pressure plate 17, and the positioning moving block 30 is still in a stationary state;

[0175] When the telescopic driving member 16 is in the state of driving the lower pressure plate 17 to move upward, and after the lower pressure plate 17 touches the transmission pressure plate 21, the lower pressure plate 17 drives the transmission pressure plate 21 to move upward. At this time, the lower pressure plate 17 is away from the moving track of the elastic cleaning module, that is, when the driving shaft 26 rotates in the opposite direction to drive the shifting driving module to move in the opposite direction toward the pretreatment tank 1, the shifting driving module synchronously drives the positioning moving block 30 and the automatic reset slider 29 to move toward the direction close to the pretreatment tank 1, and the automatic reset spring 31 is in a tensioned state, and then drives the cleaning driving rod 28 to The elastic cleaning module scrapes and cleans the flocculants and large impurities on the filter screen 2 into the collection box 4. Then, under the action of the displacement drive module, the positioning moving block 30 and the displacement drive module release the interaction force. Under the rebound force of the automatic reset spring 31, the positioning moving block 30 and the automatic reset slider 29 are automatically reset. During this process, the storage frame 12 is always in a closed water inlet 5 state. Then the lower pressure plate 17 continues to move upward to drive the storage frame 12 to move upward to open the water inlet 5 and the sewage to be pretreated enters the pretreatment tank 1 again, and this cycle is repeated.

[0176] As a preferred embodiment of the present invention, a shifting slot is provided on the cleaning mounting plate 27, and the shifting drive module includes:

[0177] The shift driving rod 32 is slidably disposed in the shift sliding groove;

[0178] The fitting drive unit is fixedly arranged on the side wall of the shifting drive rod 32 facing the side of the positioning moving block 30;

[0179] The unlocking mounting rod is fixedly arranged on the cleaning mounting plate 27 between the shifting chute and the automatic reset chute;

[0180] The unlocking drive block 33 is fixedly arranged on the top of the unlocking mounting rod, and the side surface facing the locking moving block 30 is inclined;

[0181] Among them, the driving shaft 26 and the shifting driving rod 32 are connected by a gear rack pair; the locking moving block 30 is located on the moving trajectory of the fitting driving unit; the unlocking driving block 33 is located on the moving trajectory of the locking moving block 30, and the inclined surface of the unlocking driving block 33 faces the side of the cleaning driving rod 28; the side surface of the locking moving block 30 facing the side of the unlocking driving block 33 is set as an inclined surface; the unlocking driving block 33 and the unlocking mounting rod are both away from the moving trajectory of the fitting driving unit.

[0182] Specifically, in a preferred manner in this embodiment, the inclined surface of the positioning moving block 30 is arranged at the same angle and in the same direction as the inclined surface of the unlocking driving block 33 .

[0183] More specifically, the lamination drive unit includes:

[0184] The mounting plate is fixedly mounted on the side wall of the shift drive rod 32;

[0185] The fitting connecting column is fixedly arranged on the fitting mounting plate;

[0186] The laminating wheel 34 is rotatably disposed on the laminating connecting column;

[0187] The positioning moving block 30 is located on the moving track of the fitting wheel 34 , and the unlocking driving block 33 and the unlocking mounting rod are both away from the moving track of the fitting wheel 34 and the fitting mounting plate.

[0188] When the lever 34 is in the downward position, the locking block 30 is moved to the other side of the locking block 30 away from the locking block 30, thereby releasing the interference of the locking block 30 on the movement of the engaging wheel 34. That is, the engaging wheel 34 is moved laterally to the other side of the locking block 30 away from its own inclined surface.

[0189] Then, when the transmission pressure plate 21 is in the upward state, the driving shaft 26 rotates in the opposite direction, and the power is converted into the reverse transverse movement of the shifting driving rod 32 through the gear rack pair. That is to say, at this time, the shifting driving rod 32 drives the fitting runner 34 to move in the direction close to the pretreatment tank 1. Since the positioning moving block 30 is located on the moving track of the fitting runner 34, and then under the interference of the positioning moving block 30, the fitting runner 34 acts on the positioning moving block 30, so that the shifting driving rod 32 synchronously drives the positioning moving block 30 to move horizontally, and then drives the elastic cleaning module to scrape the flocculants and large-volume impurities on the filter screen 2 into the collection box 4 through the automatic reset slider 29 and the cleaning driving rod 28. When the moving block 30 moves and touches the inclined surface of the unlocking driving block 33, under the limiting action of the unlocking driving block 33, the fitting wheel 34 drives the positioning moving block 30 to move horizontally, which is converted into the fitting wheel 34 driving the positioning moving block 30 to move longitudinally along the automatic reset slider 29 until the fitting wheel 34 drives the positioning moving block 30 to release the interaction force. Then, under the action of the rebound force of the automatic reset spring 31, the positioning moving block 30 and the automatic reset slider 29 are automatically reset. During this process, the storage frame 12 is always in the closed water inlet 5 state. Then, the lower pressure plate 17 continues to move upward to drive the storage frame 12 to move upward to open the water inlet 5 and let the sewage to be pretreated enter the pretreatment tank 1 again, and this cycle is repeated.

[0190] As a preferred embodiment of the present invention, the elastic cleaning module includes:

[0191] A cleaning positioning plate 35 is fixedly arranged on the end of the cleaning driving rod 28 located in the pretreatment tank 1;

[0192] A cleaning scraper 36 is elastically slidably disposed in the cleaning positioning plate 35;

[0193] When the cleaning scraper 36 is in a state of moving from bottom to top along the inclined surface of the filter screen 2 , the bottom of the cleaning scraper 36 is always in contact with the upper surface of the filter screen 2 .

[0194] Specifically, the sliding connection between the cleaning scraper 36 and the cleaning positioning plate 35 is elastically connected through a spring, so that the cleaning scraper 36 can be elastically slidably arranged in the cleaning positioning plate 35.

[0195] In actual application, this embodiment provides a cleaning scraper 36 that is elastically slidably arranged in the cleaning positioning plate 35, so that when cleaning the filter screen 2, it can fit more closely to the filter screen 2 to improve the cleaning effect and ensure the pretreatment effect of sewage filtration and separation.

[0196] Furthermore, in order to prevent sewage from entering the collection box 4 during the pressure holding and filtration process, the system further includes an automatic protection mechanism. A collection port is provided at the connection between the collection box 4 and the pretreatment tank 1. The protection mechanism includes:

[0197] A protective door 37, elastically sliding with damping, is provided on the inner wall of the collection box 4 and is used to close the collection opening;

[0198] The push rod 38 is fixedly mounted on the cleaning positioning plate 35 and corresponds to the protective door 37;

[0199] The push rod 38 is embedded and slidably arranged on the inner wall of the pretreatment tank 1 .

[0200] Specifically, the sliding connection between the protective door 37 and the inner wall of the collection box 4 is elastically connected by a spring, so that when the interaction force between the push rod 38 and the protective door 37 is released, the protective door 37 can be elastically reset to close the collection port.

[0201] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A multi-pond artificial wetland sewage treatment system, comprising a pretreatment tank (1) and a water inlet mechanism arranged on the pretreatment tank (1); characterized in that, Also includes: A filter (2) is fixedly mounted on the inner wall of the pretreatment tank (1) and is located between the water inlet mechanism and the inner wall of the bottom of the pretreatment tank (1); A flocculation mixing and filter pressing mechanism is provided between the filter screen (2) and the top of the pretreatment tank (1) and is used for flocculation treatment of sewage impurities and pressure holding filtration at the same time; An automatic reset cleaning mechanism is provided on the side wall of the pretreatment tank (1) and is spatially located between the flocculation mixing and filter pressing mechanism and the filter screen (2); A transmission mechanism is provided on the side wall of the pretreatment tank (1) and is located between the flocculation mixing and filter pressing mechanism and the automatic reset cleaning mechanism, and is used to intermittently convert the driving force of the flocculation mixing and filter pressing mechanism into the cleaning driving force of the automatic reset cleaning mechanism; A collecting box (4) is fixedly connected to the side wall of the pretreatment tank (1); Wherein, the flocculation mixing and filtration mechanism includes: A flocculation adding module is slidably arranged on the inner wall of the pretreatment tank (1) and is used for intermittently controlling the water inlet mechanism while providing flocculants; A driving module is arranged on the top wall of the pretreatment tank (1) and is used to provide a reciprocating driving force while controlling the flocculation adding module; Wherein, the transmission mechanism is arranged between the automatic reset cleaning mechanism and the driving module.

2. A multi-pond artificial wetland sewage treatment system according to claim 1, characterized in that: The flocculation addition module includes: A storage frame (12) is provided with a damping sliding fit on the inner wall of the pretreatment tank (1); At least one group of input ports is provided and opened at the bottom of the storage frame (12); An input drive unit, corresponding to the input port one by one, is elastically slidably arranged on the storage frame (12) and is located on the moving track of the drive module, and is used to control the opening and closing of the input port; The driving module is provided with a damped slide on the side wall of the storage frame (12); the sliding friction between the driving module and the side wall of the storage frame (12) is smaller than the sliding friction between the storage frame (12) and the side wall of the pretreatment tank (1).

3. A multi-pond artificial wetland sewage treatment system according to claim 2, characterized in that: The driving module includes: A telescopic driving member (16) is fixedly arranged on the top of the pretreatment tank (1); A lower pressure plate (17) is arranged to slide in contact with the inner wall of the pretreatment tank (1), and is arranged to slide in the sliding guide groove (13) with damping; The sliding friction between the lower pressing plate (17) and the sliding guide groove (13) is smaller than the sliding friction between the storage frame (12) and the side wall of the pretreatment tank (1); the lower pressing plate (17) is fixedly arranged on the telescopic end of the telescopic driving member (16); When the telescopic driving member (16) is at the minimum stroke position, the transmission mechanism and the lower pressing plate (17) are in a compressed state with an interaction force; When the telescopic driving member (16) is at the maximum stroke position, the transmission mechanism and the lower pressing plate (17) are in a state of no interaction force; When the telescopic driving member (16) is in a state of driving the lower pressing plate (17) to press downward, no power is transmitted between the transmission mechanism and the lower pressing plate (17), and the transmission mechanism is in an automatic elastic reset state; When the telescopic driving member (16) is in a state of driving the lower pressing plate (17) to move upward, and there is no interaction force between the transmission mechanism and the lower pressing plate (17), there is no power transmission between the transmission mechanism and the lower pressing plate (17), and the automatic reset cleaning mechanism is in a stationary state; When the telescopic driving member (16) is in a state of driving the lower pressing plate (17) to move upward, and there is an interaction force between the transmission mechanism and the lower pressing plate (17), there is a power transmission state between the transmission mechanism and the lower pressing plate (17), and the automatic reset cleaning mechanism is in an operating state.

4. A multi-pond artificial wetland sewage treatment system according to claim 1, characterized in that: A first mounting frame (19) is fixedly provided on the top of the pretreatment tank (1), a second mounting frame (20) is fixedly provided on the outer side wall of the pretreatment tank (1), a first support mounting plate is fixedly provided between the top of the first mounting frame (19) and the top of the pretreatment tank (1), a second support mounting plate is fixedly provided between the second mounting frame (20) and the outer side wall of the pretreatment tank (1), a lifting avoidance groove is provided on the top of the pretreatment tank (1), and the transmission mechanism comprises: A transmission pressure plate (21) is slidably arranged on the inner wall of the pretreatment tank (1); A transmission drive plate (22) is fixedly arranged at its bottom on the transmission pressure plate (21) and is slidably arranged in the lifting avoidance groove; A plurality of reset drive springs (23) are evenly arranged between the transmission pressure plate (21) and the top inner wall of the pretreatment tank (1); A transmission shaft (24) is rotatably mounted on the first support mounting plate and the side wall of the first mounting frame (19); A transition shaft (25) is rotatably mounted on the first support mounting plate, the side wall of the first mounting frame (19), and the side wall of the second mounting frame (20); A driving shaft (26) is rotatably mounted on the second support mounting plate; The transmission drive plate (22) and the transmission shaft (24) are connected via a gear rack pair, the transmission shaft (24) and the transition shaft (25) are connected via a gear pair, the transition shaft (25) and the drive shaft (26) are connected via a bevel gear pair, and the drive shaft (26) and the automatic reset cleaning mechanism are connected via a gear rack pair.

5. A multi-pond artificial wetland sewage treatment system according to claim 4, characterized in that: The automatic reset cleaning mechanism comprises: A cleaning mounting plate (27) is fixedly mounted on the outer side wall of the pretreatment tank (1) and the inner side wall of the second mounting frame (20); A cleaning drive rod (28) is provided in a sealing and sliding manner on the side wall of the pretreatment tank (1); An automatic reset drive module is elastically slidably arranged on the cleaning mounting plate (27); An elastic cleaning module fixedly arranged at the end of a cleaning drive rod (28) located in the pretreatment tank (1); A displacement drive module is slidably arranged on the cleaning mounting plate (27) and is used to provide a unidirectional driving force for the automatic reset drive module; The end of the cleaning drive rod (28) away from the elastic cleaning module is fixedly arranged on the automatic reset drive module; the displacement drive module and the drive shaft (26) are connected via a gear rack pair; When the elastic cleaning module is in a state of moving from bottom to top along the inclined surface of the filter screen (2), the elastic cleaning module and the upper surface of the filter screen (2) are always in contact with each other.

6. A multi-pond artificial wetland sewage treatment system according to claim 5, characterized in that: An automatic reset chute is provided on the cleaning mounting plate (27), and the automatic reset drive module comprises: An automatic reset slider (29) is slidably arranged in the automatic reset slide groove; A positioning moving block (30) is elastically slidably arranged on the automatic reset slider (29); An automatic reset spring (31) is fixedly connected between the automatic reset slider (29) on the side away from the cleaning drive rod (28) and the inner side wall of the second mounting frame (20); The sliding track between the positioning moving block (30) and the automatic reset slider (29) and the moving track of the automatic reset slider (29) are in a mutually perpendicular state in space; the end of the cleaning drive rod (28) away from the elastic cleaning module is fixedly arranged on the automatic reset slider (29), and the displacement drive module is arranged between the positioning moving block (30) and the driving shaft (26).

7. A multi-pond artificial wetland sewage treatment system according to claim 6, characterized in that: The cleaning installation plate (27) is provided with a displacement slide groove, and the displacement drive module includes: A shift driving rod (32) is slidably disposed in the shift sliding groove; The fitting drive unit is fixedly arranged on the side wall of the shifting drive rod (32) facing the side of the positioning moving block (30); An unlocking mounting rod is fixedly arranged on a cleaning mounting plate (27) between the shifting chute and the automatic reset chute; An unlocking drive block (33) is fixedly arranged on the top of the unlocking mounting rod, and the side surface facing the locking moving block (30) is arranged as an inclined surface; The driving shaft (26) and the shifting driving rod (32) are connected via a gear rack pair; the positioning moving block (30) is located on the moving track of the fitting driving unit; the unlocking driving block (33) is located on the moving track of the positioning moving block (30), and the inclined surface of the unlocking driving block (33) faces the side of the cleaning driving rod (28); the side surface of the positioning moving block (30) facing the side of the unlocking driving block (33) is arranged as an inclined surface; the unlocking driving block (33) and the unlocking mounting rod are both away from the moving track of the fitting driving unit.

8. The multi-pond artificial wetland sewage treatment system according to claim 7, characterized in that: The lamination drive unit includes: A fitting mounting plate fixedly arranged on the side wall of the shifting drive rod (32); The fitting connecting column is fixedly arranged on the fitting mounting plate; A fitting rotating wheel (34) is rotatably arranged on the fitting connecting column; The positioning moving block (30) is located on the moving track of the fitting rotating wheel (34), and the unlocking driving block (33) and the unlocking mounting rod are both away from the moving track of the fitting rotating wheel (34) and the fitting mounting plate.

9. The multi-pond artificial wetland sewage treatment system according to claim 5, characterized in that: The elastic cleaning module includes: A cleaning positioning plate (35) is fixedly arranged at the end of a cleaning driving rod (28) located in the pretreatment tank (1); A cleaning scraper (36) is elastically slidably disposed in the cleaning positioning plate (35); When the cleaning scraper (36) is in a state of moving from bottom to top along the inclined surface of the filter screen (2), the bottom of the cleaning scraper (36) is always in contact with the upper surface of the filter screen (2).

10. The multi-pond artificial wetland sewage treatment system according to claim 1, characterized in that: The system further comprises an automatic protection mechanism, wherein a collection port is provided at the connection between the collection box (4) and the pretreatment tank (1), and the automatic protection mechanism comprises: A protective door (37) with damping elastic sliding arranged on the inner wall of the collection box (4) for closing the collection port; A push rod (38) is fixedly mounted on the cleaning positioning plate (35) and corresponds to the protective door (37); The push rod (38) is embedded and slidably arranged on the inner wall of the pretreatment tank (1).

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