A municipal sewage treatment system

Abstract

The application relates to the technical field of sewage treatment, and discloses a municipal sewage treatment system which comprises a treatment tank, a filter plate arranged in the middle of the treatment tank, a protection plate connected to the upper end of the treatment tank, a water inlet pipe and a water outlet pipe connected to the treatment tank, wherein the water inlet pipe is located on the upper side of the filter plate, the water outlet pipe is located on the lower side of the filter plate, the protection plate is rotationally arranged on the treatment tank, one side of the protection plate close to the filter plate is connected with a collecting box, one side of the collecting box is provided with a collecting opening for garbage, the treatment tank is provided with a rotating mechanism for driving the protection plate to overturn and a pushing mechanism for pushing the garbage on the filter plate to the collecting box; the protection plate is provided with a lifting mechanism for driving the collecting box to move vertically, and when the lifting mechanism drives the collecting box to move upwards, the direction of the collecting opening changes from horizontal to obliquely upwards. When the garbage on the filter plate is cleaned, the protection plate does not need to be opened for manual cleaning, and the cleaning efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, and in particular to a municipal sewage treatment system. BACKGROUND

[0002] With the continuous development of society and the increasing improvement of people's living standards, the discharge amount of urban sewage is also increasing. In order to make the discharged sewage meet the water quality requirements for flowing into a water body or being reused, the sewage needs to be purified and treated.

[0003] In the related art, a municipal sewage treatment system is disclosed in Chinese Patent No. CN204675958U, which comprises a treatment chamber, a water inlet pipe and a water outlet pipe arranged on the upper side and the lower side of the right side wall of the treatment chamber respectively, a garbage cleaning chamber arranged on the upper end of the left side wall of the treatment chamber, and a protective plate hingedly arranged on the upper end of the garbage cleaning chamber. An inclined coarse filter plate is arranged on the upper side of the inner cavity of the treatment chamber, and a "V"-shaped fine filter plate is arranged in the middle of the inner cavity of the treatment chamber. The sewage treatment system adopts the structure of the coarse filter plate and the fine filter plate for grading filtration, so that the garbage of different sizes in the sewage can be graded and filtered, and the filtering effect is good.

[0004] However, after the above-mentioned municipal sewage treatment system is used for a long time, a large amount of garbage will inevitably accumulate in the garbage cleaning chamber. In order to avoid the coarse filter plate being blocked by the garbage, the staff needs to open the protective plate regularly and manually clean the garbage in the garbage cleaning chamber, which is time-consuming and laborious, and the cleaning efficiency is low, and thus needs to be improved. SUMMARY

[0005] In order to improve the cleaning efficiency of garbage, the present application provides a municipal sewage treatment system.

[0006] The municipal sewage treatment system provided by the present application adopts the following technical scheme:

[0007] A municipal sewage treatment system comprises a treatment tank, a filter plate arranged in the middle of the treatment tank, and a protective plate connected to the upper end of the treatment tank. The treatment tank is connected with a water inlet pipe and a water outlet pipe. The water inlet pipe is arranged on the upper side of the filter plate, and the water outlet pipe is arranged on the lower side of the filter plate. The protective plate is rotatably arranged on the treatment tank, and one side of the protective plate close to the filter plate is connected with a collection box. One side of the collection box is provided with a collection opening for garbage to enter. The treatment tank is provided with a rotating mechanism for driving the protective plate to overturn, and a pushing mechanism for pushing the garbage on the filter plate to the collection box. The protective plate is provided with a lifting mechanism for driving the collection box to move vertically. When the lifting mechanism drives the collection box to move upward, the orientation of the collection opening changes from horizontal to obliquely upward.

[0008] By adopting the technical scheme, after the sewage flows into the treatment tank along the water inlet pipe, the filter plate can intercept the garbage in the sewage, so that the garbage is intercepted on the filter plate, and the filtered sewage flows out of the filter tank along the water outlet pipe. When it is necessary to clean the garbage on the filter plate, first, the lifting mechanism is used to drive the collection box to move downward, so that the collection opening faces the horizontal direction; then the pushing mechanism is started, so that the garbage on the filter plate is pushed into the collection box; then the lifting mechanism is used to drive the collection box to move upward, so that the collection opening faces upward, so as to reduce the risk of garbage falling from the collection box; finally, the rotating mechanism is controlled to flip the protective plate by 180°, so that the collection box moves to the outside of the treatment tank, so that the worker can take out the garbage, thereby realizing the automatic cleaning of the garbage. The above cleaning method does not need the worker to manually open the protective plate and clean the garbage by hand in the treatment tank, which saves time and effort and has high cleaning efficiency.

[0009] Optionally, the middle part of the protective plate is fixed with a rotating shaft penetrating the treatment tank, and the rotating mechanism comprises a servo motor arranged on the treatment tank, a driving gear fixedly connected with an output shaft of the servo motor, and a driven gear meshing on one side of the driving gear and fixedly connected with the rotating shaft.

[0010] By adopting the technical scheme, when the servo motor works, the driving gear will rotate synchronously with the output shaft of the servo motor, so that the driven gear drives the rotating shaft to rotate circumferentially, thereby realizing the automatic flipping of the protective plate, which is simple in structure and good in driving effect.

[0011] Optionally, the lifting mechanism comprises a lifting cylinder arranged on the protective plate and a lifting rod fixedly connected with a piston rod of the lifting cylinder, and the lifting rod is hingedly arranged on the collection box, and the cylinder barrel of the lifting cylinder is located on the side of the protective plate away from the collection box.

[0012] By adopting the technical scheme, during garbage cleaning, the piston rod of the lifting cylinder is elongated, and the lifting rod drives the collection box to move to the side close to the filter plate, so that the collection box abuts against the filter plate, so as to facilitate the garbage to be pushed into the collection box under the action of the pushing mechanism, and the collection effect is good. After cleaning, the piston rod of the lifting cylinder is shortened, and the lifting rod drives the collection box to move to the side away from the filter plate, so that the collection box is separated from the filter plate, on the one hand, a certain space is formed between the collection box and the filter plate, so as to prevent the filter plate from colliding with the collection box when the protective plate is flipped; on the other hand, the filter holes on the filter plate are not easily blocked by the collection box, and the sewage treatment efficiency is high.

[0013] In addition, the cylinder barrel of the lifting cylinder and the collection box are arranged on the two sides of the protective plate, and when the collection box collects garbage, if the protective plate is flipped by 180°, the garbage in the collection box will be poured on the protective plate instead of the lifting cylinder, which is beneficial to the normal use of the lifting cylinder.

[0014] Optionally, the lifting rod and the collecting box are hingedly connected through a hinge shaft, the hinge shaft is located at one end of the collecting box close to the collecting port, and when the collecting box abuts against the filter plate and the collecting port faces the horizontal direction, the hinge shaft is located at the upper side of the collecting port.

[0015] By adopting the above technical scheme, when the collecting port faces the horizontal direction, the center of gravity of the collecting box is in an eccentric position relative to the hinge shaft. During the process that the lifting cylinder drives the collecting box to move upward, the collecting box rotates around the hinge shaft and the center of gravity gradually deviates to the position directly below the hinge shaft, so that the orientation of the collecting port is automatically changed from the horizontal direction to the obliquely upward direction, and the structure is simple and the linkage is good.

[0016] Optionally, a first magnet is fixedly embedded on the side wall of the collecting box away from the hinge shaft.

[0017] By adopting the above technical scheme, the first magnet can adsorb iron filings and other impurities in the sewage, and the sewage treatment effect is good.

[0018] Optionally, a second magnet for magnetic attraction with the first magnet is fixedly embedded on the filter plate, and when the first magnet and the second magnet attract each other, the collecting port faces the horizontal direction of the pushing mechanism.

[0019] By adopting the above technical scheme, when the collecting box moves toward the filter plate, the second magnet will attract the first magnet, so that the collecting box is automatically adjusted to the state that the collecting port faces the horizontal direction of the pushing mechanism, which is beneficial to improve the stability of the collecting box.

[0020] Optionally, a guide slope is arranged on the inner wall of the collecting box, and the guide slope is used for guiding the garbage from the collecting port to the inside of the collecting box.

[0021] By adopting the above technical scheme, after the garbage enters the collecting box along the collecting port, the guide slope guides the garbage at the collecting port to the inside of the collecting box, so as to prevent the garbage from being accumulated at the collecting port and blocking the collecting port.

[0022] Optionally, the pushing mechanism comprises a pushing plate located directly above the filter plate and a pushing cylinder for driving the pushing plate to reciprocate toward the collecting box, and the side surface of the pushing plate facing the collecting box is a concave arc surface.

[0023] By adopting the above technical scheme, when the piston rod of the pushing cylinder extends or retracts, the pushing plate will move toward or away from the collecting box, so as to automatically push the garbage on the filter plate into the collecting box, which saves the trouble of manual garbage cleaning of the staff and improves the cleaning efficiency. The concave arc surface not only effectively increases the contact area between the pushing plate and the garbage and improves the pushing effect, but also collects the garbage to the middle part of the pushing plate, so as to prevent the garbage on the filter plate from scattering everywhere, and the cleaning effect is good.

[0024] Optionally, a plurality of cleaning mechanisms are arranged on the push plate at intervals, the cleaning mechanism comprising a cleaning screw connected to the lower side of the push plate, a plurality of cleaning rings threadedly connected to the cleaning screw, and stirring blades fixed to the circumferential side wall of the cleaning ring, the extending directions of the stirring blades in the same cleaning mechanism are different from each other, and the filter plate is provided with a clearance hole for sliding fit of the cleaning screw.

[0025] By adopting the above technical scheme, when the push plate moves relative to the filter plate, each cleaning screw moves synchronously with the push plate, so that the stirring blades stir the sewage in the treatment tank, so that the sludge is not easy to deposit at the bottom of the treatment tank, so as to facilitate the sludge to flow out of the treatment tank along the water outlet pipe or to be subsequently pumped out under the action of the sludge pump. The cleaning ring is threadedly connected to the cleaning screw, so that when the sewage in the treatment tank forms a turbulent flow, the cleaning ring and the stirring blade rotate relative to the cleaning screw, thereby further improving the stirring effect of the cleaning mechanism on the sludge.

[0026] Optionally, a support ring is fixedly arranged on the inner wall of the treatment tank, and the filter plate is placed on the support ring.

[0027] By adopting the above technical scheme, the filter plate is arranged in the treatment tank in a lap joint manner, and the installation is convenient to operate. When it is necessary to further clean the sludge remaining in the filter plate, the protective plate is turned to the vertical state, then the worker can enter the treatment tank along the gap formed between the protective plate and the treatment tank and stand on the filter plate to clean, and the support ring abuts against the upper side of the filter plate, which can effectively improve the bearing performance of the filter plate and prevent the worker from falling.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. When cleaning the garbage on the filter plate, the garbage is first pushed into the collection box by the push mechanism, then the collection box is driven upward by the lifting mechanism, and then the protective plate is turned over by 180° by the rotating mechanism, so that the garbage is moved out of the treatment tank with the collection box. This cleaning method does not need to open the protective plate for cleaning operation, which saves time and effort and has high cleaning efficiency.

[0030] 2. When the lifting mechanism drives the collection box to move upward, the center of gravity of the collection box is offset to the middle part relative to the hinge shaft, so that the orientation of the collection port is changed from horizontal to upward, thereby preventing the garbage in the collection box from falling off.

[0031] 3. When the push mechanism works, the cleaning screw moves synchronously with the push plate, so that the stirring blades stir the sewage in the treatment tank to prevent the sludge from depositing at the bottom of the treatment tank, which is beneficial to the discharge of the sludge from the treatment tank. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic diagram of an embodiment of the present application.

[0033] Figure 2 This is a cross-sectional schematic diagram of an embodiment of this application.

[0034] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0035] Figure 4 This is a schematic diagram of the structure of the filter plate, the pushing mechanism, and the cleaning mechanism in the embodiments of this application.

[0036] Figure 5 This is a schematic diagram of the structure when the lifting mechanism drives the collection box to move upward in the embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Treatment tank; 11. Inlet pipe; 12. Outlet pipe; 13. Support ring; 14. Mounting groove; 2. Filter plate; 21. Filter holes; 22. Clearance hole; 23. Second magnet; 3. Protective plate; 31. Rotating shaft; 4. Rotating mechanism; 41. Servo motor; 42. Drive gear; 43. Driven gear; 5. Collection box; 51. Collection port; 52. Guide slope; 53. First magnet; 6. Pushing mechanism; 61. Push plate; 611. Concave arc surface; 62. Pushing cylinder; 7. Cleaning mechanism; 71. Cleaning screw; 72. Cleaning ring; 73. Agitator blade; 8. Lifting mechanism; 81. Lifting cylinder; 82. Lifting rod; 83. Hinge shaft. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0040] This application discloses a municipal wastewater treatment system.

[0041] Reference Figure 1 , Figure 2 The municipal wastewater treatment system includes a treatment tank 1, a filter plate 2 located in the middle of the treatment tank 1, and a protective plate 3 rotatably connected to the upper end of the treatment tank 1. The filter plate 2 has multiple filter holes 21 spaced apart for wastewater to flow through. An inlet pipe 11 and an outlet pipe 12 are fixedly connected to the side wall of the treatment tank 1, with the inlet pipe 11 located above the filter plate 2 and the outlet pipe 12 located below the filter plate 2. During wastewater treatment, wastewater is input into the treatment tank 1 through the inlet pipe 11. The filter plate 2 intercepts debris in the wastewater, trapping it on the filter plate 2. The wastewater flows along the filter holes 21 towards the bottom of the treatment tank 1, and the filtered wastewater is then discharged from the treatment tank 1 through the outlet pipe 12.

[0042] Reference Figure 2 , Figure 3A support ring 13 is provided on the inner wall of the treatment tank 1. The support ring 13 is square and is fixedly connected to the four side walls of the treatment tank 1. The edge of the filter plate 2 is abutted against the upper side of the support ring 13. When installing the filter plate 2, the operator only needs to overlap the filter plate 2 on the support ring 13, which is simple to operate.

[0043] Reference Figure 2 , Figure 3 A rotating shaft 31 is fixed to the middle of the protective plate 3 on both opposite sides. The rotating shaft 31 is rotatably inserted into the wall of the treatment tank 1, allowing the protective plate 3 to rotate relative to the treatment tank 1. When the protective plate 3 is in a horizontal state, the upper opening of the treatment tank 1 is blocked by the protective plate 3 to prevent debris from falling into the treatment tank 1. When the protective plate 3 is in a vertical state, a gap is formed between the treatment tank 1 and the protective plate 3, allowing personnel to enter the treatment tank 1 through the gap to clean the filter plate 2.

[0044] Reference Figure 3 To save staff the trouble of manually flipping the protective plate 3, a rotating mechanism 4 is provided on the processing pool 1 to drive the protective plate 3 to flip. The rotating mechanism 4 includes a servo motor 41, a driving gear 42 fixedly connected to the output shaft of the servo motor 41, and a driven gear 43 meshing on one side of the driving gear 42. The driven gear 43 is fixedly connected to one of the rotating shafts 31. To save space occupied by the rotating mechanism 4, a mounting groove 14 is provided on the outer wall of the processing pool 1, and the servo motor 41 is installed in the mounting groove 14. When the servo motor 41 is working, the driving gear 42 will rotate synchronously with the output shaft of the servo motor 41, thereby causing the driven gear 43 to drive the rotating shaft 31 to rotate circumferentially, thus realizing the automatic flipping of the protective plate 3.

[0045] Reference Figure 2 , Figure 3 To improve the efficiency of cleaning waste from the filter plate 2, a collection box 5 for collecting waste is connected to the side of the protective plate 3 near the filter plate 2. A pushing mechanism 6 is provided on the filter plate 2 to horizontally push the waste into the collection box 5. The collection box 5 has a collection opening 51 on the side facing the pushing mechanism 6, and a guide slope 52 is provided on the inner wall of the collection box 5. The guide slope 52 has a tendency to guide the waste from the collection opening 51 into the interior of the collection box 5. When the pushing mechanism 6 is working, the waste on the filter plate 2 will enter the collection box 5 along the collection opening 51 and then enter the interior of the collection box 5 along the guide slope 52.

[0046] Reference Figure 2 , Figure 4The pushing mechanism 6 includes a push plate 61 located directly above the filter plate 2 and a pushing cylinder 62 for driving the push plate 61 to reciprocate towards the collection box 5. The cylinder barrel of the pushing cylinder 62 is fixedly mounted on the outer wall of the treatment tank 1, and the piston rod passes horizontally through the treatment tank 1 and is fixedly connected to the push plate 61. The side of the push plate 61 facing the collection box 5 is a concave arc surface 611. When the piston rod of the pushing cylinder 62 extends, the push plate 61 moves towards the side closer to the collection box 5 to push the waste on the filter plate 2 into the collection box 5. When the piston rod of the pushing cylinder 62 retracts, the push plate 61 moves away from the collection box 5 to achieve automatic reset of the push plate 61. It should be noted that in other embodiments, the above-mentioned pushing cylinder 62 can also be replaced by other structures such as hydraulic cylinders, electric push rods, or motor lead screws.

[0047] Reference Figure 4 A plurality of cleaning mechanisms 7 are spaced apart on the push plate 61. In this embodiment, three sets of cleaning mechanisms 7 are shown to illustrate their structure. Each set of cleaning mechanisms 7 includes a cleaning screw 71, a plurality of cleaning rings 72 threadedly connected to the cleaning screw 71, and agitating blades 73 fixed to the circumferential sidewall of the cleaning rings 72. The cleaning screw 71 is fixedly connected to the lower side of the push plate 61, and the extension directions of the agitating blades 73 in the same cleaning mechanism 7 are different from each other. The filter plate 2 has a number of clearance holes 22 that correspond one-to-one with the number of cleaning mechanisms 7. The extension direction of the clearance holes 22 is parallel to the extension and retraction direction of the piston rod of the push cylinder 62, and each cleaning screw 71 is slidably fitted in the corresponding clearance hole 22. When the pushing mechanism 6 is working, the cleaning screw 71 will move synchronously with the push plate 61, so that the cleaning ring 72 drives the stirring blade 73 to move in the treatment tank 1, thereby making the stirring blade 73 stir the sewage in the treatment tank 1, so as to prevent sludge from accumulating in the treatment tank 1 and clogging the outlet pipe 12.

[0048] Reference Figure 2 , Figure 5 To prevent the filter plate 2 from affecting the rotation of the collection box 5 along with the protective plate 3, a lifting mechanism 8 for driving the vertical movement of the collection box 5 is provided on the protective plate 3. The lifting mechanism 8 includes a lifting cylinder 81 and a lifting rod 82 fixedly connected to the piston rod of the lifting cylinder 81. The cylinder barrel of the lifting cylinder 81 is fixedly mounted on the protective plate 3, and the piston rod passes through the protective plate 3 and is fixedly connected to the lifting rod 82. The lifting rod 82 and the collection box 5 are hinged to each other by a hinge shaft 83, which is located at the end of the collection box 5 near the collection port 51, and on the side of the collection port 51 away from the guide slope 52.

[0049] Reference Figure 2 , Figure 5When the piston rod of the lifting cylinder 81 is extended, the collecting box 5 abuts against the filter plate 2 and the collecting port 51 is horizontally oriented towards the pushing mechanism 6, at this time, the hinged shaft 83 is located on the upper side of the collecting port 51, and the gravity center of the collecting box 5 is eccentric relative to the hinged shaft 83, that is, the gravity center of the collecting box 5 is located on the side of the hinged shaft 83 away from the pushing mechanism 6. When the piston rod of the lifting cylinder 81 is shortened, the collecting box 5 is pulled upward by the lifting rod 82, and at the same time, the gravity center of the collecting box 5 is offset to the middle relative to the hinged shaft 83, that is, the gravity center of the collecting box 5 gradually moves to the position directly below the hinged shaft 83, and the orientation of the collecting port 51 changes from the horizontal direction to the obliquely upward direction, so that the garbage in the collecting box 5 is not easy to fall off.

[0050] Referring to Figure 4 , Figure 5 To further improve the stability of the collecting box 5 abutting against the filter plate 2, a plurality of first magnets 53 are embedded in the side wall of the collecting box 5 away from the hinged shaft 83, and a plurality of second magnets 23 are embedded in the filter plate 2 and magnetically attracted to the first magnets 53, the number of the first magnets 53 and the second magnets 23 is equal and one-to-one corresponding, and two first magnets 53 and two second magnets 23 are provided in the embodiment to illustrate the structure. During the movement of the collecting box 5 towards the filter plate 2, the second magnets 23 quickly attract the side wall of the collecting box 5 embedded with the first magnets 53 to the filter plate 2, so that the collecting box 5 can quickly adjust to the state that the collecting port 51 is horizontally oriented towards the pushing mechanism 6.

[0051] The implementation principle of the municipal sewage treatment system in the embodiment of the application is as follows: when the garbage on the filter plate 2 is cleaned, first, the piston rod of the lifting cylinder 81 is controlled to be extended, so that the collecting box 5 abuts against the filter plate 2 and the first magnets 53 are attracted to the second magnets 23, at this time, the collecting port 51 is horizontally oriented towards the pushing mechanism 6; then, the piston rod of the pushing cylinder 62 is controlled to be extended, so that the pushing plate 61 pushes the garbage on the filter plate 2 into the collecting box 5, and at the same time, the stirring blade 73 stirs the sewage in the treatment tank 1. Then, the piston rod of the lifting cylinder 81 is controlled to be shortened, so that the collecting box 5 is separated from the filter plate 2 and the collecting port 51 is oriented obliquely upward; finally, the servo motor 41 is started, so that the driving gear 42 drives the driven gear 43, the rotating shaft 31 and the protective plate 3 to rotate, until the protective plate 3 is turned over by 180°, at this time, the garbage is removed from the treatment tank 1 with the collecting box 5, so that the garbage is automatically and quickly cleaned, and the cleaning efficiency is high, time and labor are saved.

[0052] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A municipal sewage treatment system, comprising a treatment tank (1), a filter plate (2) arranged in the middle of the treatment tank (1), a protection plate (3) connected to the upper end of the treatment tank (1), a water inlet pipe (11) and a water outlet pipe (12) connected to the treatment tank (1), the water inlet pipe (11) being located on the upper side of the filter plate (2) and the water outlet pipe (12) being located on the lower side of the filter plate (2), characterized in that: The protective plate (3) is rotatably arranged on the treatment tank (1), and a collecting box (5) is connected to the side of the protective plate (3) close to the filter plate (2), one side of the collecting box (5) is provided with a collecting opening (51) for garbage entering, the treatment tank (1) is provided with a rotating mechanism (4) for overturning the protective plate (3), and a pushing mechanism (6) for pushing the garbage on the filter plate (2) to the collecting box (5); the protective plate (3) is provided with a lifting mechanism (8) for driving the collecting box (5) to move vertically, when the lifting mechanism (8) drives the collecting box (5) to move upward, the direction of the collecting opening (51) changes from horizontal to upward; the pushing mechanism (6) includes a pushing plate (61) located directly above the filter plate (2), a pushing cylinder (62) for driving the pushing plate (61) to reciprocate towards the collecting box (5), and the side of the pushing plate (61) facing the collecting box (5) is a concave arc surface (611); a plurality of cleaning mechanisms (7) are arranged on the pushing plate (61) at intervals, the cleaning mechanism (7) includes a cleaning screw (71) connected to the lower side of the pushing plate (61), a plurality of cleaning rings (72) threadedly connected to the cleaning screw (71), and stirring blades (73) fixed to the circumferential side wall of the cleaning ring (72), the extension directions of the stirring blades (73) in the same cleaning mechanism (7) are different, and the filter plate (2) is provided with a clearance hole (22) for sliding cooperation with the cleaning screw (71).

2. The municipal sewage treatment system of claim 1, wherein: The middle part of the protective plate (3) is fixed with a rotating shaft (31) rotatably arranged on the treatment tank (1), the rotating mechanism (4) includes a servo motor (41) arranged on the treatment tank (1), a driving gear (42) fixedly connected with the output shaft of the servo motor (41), and a driven gear (43) engaged on one side of the driving gear (42), the driven gear (43) is fixedly connected with the rotating shaft (31).

3. The municipal sewage treatment system of claim 1, wherein: The lifting mechanism (8) includes a lifting cylinder (81) arranged on the protective plate (3), and a lifting rod (82) fixedly connected with the piston rod of the lifting cylinder (81), the lifting rod (82) is hingedly arranged on the collecting box (5), and the cylinder barrel of the lifting cylinder (81) is located on the side of the protective plate (3) away from the collecting box (5).

4. The municipal sewage treatment system of claim 3, wherein: The lifting rod (82) and the collecting box (5) are hingedly connected through a hinge shaft (83), and the hinge shaft (83) is located at one end of the collecting box (5) close to the collecting opening (51); when the collecting box (5) abuts against the filter plate (2) and the collecting opening (51) faces the horizontal direction, the hinge shaft (83) is located on the upper side of the collecting opening (51).

5. The municipal sewage treatment system of claim 4, wherein: A first magnet (53) is fixedly embedded on the side wall of the collecting box (5) away from the hinge shaft (83).

6. The municipal sewage treatment system of claim 5, wherein: A second magnet (23) is fixedly embedded on the filter plate (2) for magnetic attraction with the first magnet (53), when the first magnet (53) and the second magnet (23) attract each other, the collecting opening (51) faces horizontally towards the pushing mechanism (6).

7. The municipal sewage treatment system of claim 1, wherein: The inner wall of the collecting box (5) is provided with a guide slope (52), which is used for guiding the garbage from the collecting port (51) to the inside of the collecting box (5).

8. The municipal sewage treatment system of claim 1, wherein: The inner wall of the processing pool (1) is fixedly provided with a supporting ring (13), and the filter plate (2) is placed on the supporting ring (13).

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