Urban sewage treatment system

Abstract

The invention relates to the technical field of sewage treatment, in particular to an urban sewage treatment system which comprises a first sedimentation tank, a second sedimentation tank, a balance tank and a dismounting mechanism, the dismounting mechanism comprises two rotatable mounting seat mechanisms, two lifting arms and two connecting plates, when sewage treatment is completed, the lifting arms are started, and the mounting seat mechanisms are connected through the connecting plates; after a first cover plate and a second cover plate are driven to ascend, a pulling plate and a filter plate are separated from the corresponding first sedimentation tank and second sedimentation tank, a rotatable mounting seat mechanism is started, a lifting arm is driven to rotate, the pulling plate and the filter plate are far away from the corresponding first sedimentation tank and second sedimentation tank, the lifting arm is reset, and the pulling plate and the filter plate are driven to descend; by adopting the structure, the disassembly of the drawing plate, the screen and the filter plate can be automatically completed, and the subsequent cleaning of the drawing plate, the screen and the filter plate is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an urban sewage treatment system. Background Art

[0002] At present, when replacing the filter screen in the urban sewage treatment system on the market, because of the traditional horizontal setting method, it is necessary to manually go down into the sedimentation tank to take out the filter screen and the drawer plate. Due to the harsh internal environment, the process of taking out the screen is particularly inconvenient, and the speed of some sewage treatment is not fast enough.

[0003] In order to solve the above problems, a municipal sewage treatment system is disclosed in the patent document with publication number CN205710212U, wherein a detachable longitudinal pumping plate is installed in the groove in the middle section of the bottom of the first sedimentation tank, and a first cover plate is installed in the middle section of the top. The pumping plate passes through the middle section of the top of the first sedimentation tank, and the pumping plate divides the first sedimentation tank into two parts: a left filter area and a right sedimentation area. The upper part of the pumping plate is made of solid cement, and the lower part is installed with a first filter screen. A horizontal screen is provided in the middle of the left filter area below the water inlet pipe, and a first pumping pump is provided on the first drainage pipe. A detachable longitudinal second filter screen is installed in the middle section of the bottom of the second sedimentation tank, and a second cover plate is installed in the middle section of the top. The second filter screen passes through the middle section of the top of the second sedimentation tank. The above structure has the advantages of convenient replacement of parts and fast sewage treatment speed.

[0004] However, the existing urban sewage treatment system does not have a disassembly mechanism, and the staff needs to manually remove the cover from the top of the corresponding sedimentation tank, and then take out the screen, pump plate and filter from the inside of the corresponding sedimentation tank, which is not convenient enough. Summary of the invention

[0005] The purpose of the present invention is to provide an urban sewage treatment system, which aims to solve the technical problem that the existing urban sewage treatment system has no disassembly mechanism, and the staff needs to manually remove the cover plate from the top of the corresponding sedimentation tank and then remove the screen, pump plate and filter from the inside of the corresponding sedimentation tank, which is not convenient for operation.

[0006] To achieve the above-mentioned object, the present invention provides an urban sewage treatment system, comprising a first sedimentation tank, a second sedimentation tank, a balancing tank and a disassembly mechanism, a first suction pump is arranged between the first sedimentation tank and the second sedimentation tank, a second suction pump is arranged between the second sedimentation tank and the balancing tank, a first cover plate is arranged at the top of the first sedimentation tank, a pumping plate is vertically arranged at the inner middle of the first sedimentation tank, a screen is arranged on the pumping plate, a second cover plate is arranged at the top of the second sedimentation tank, and a filter plate is vertically arranged at the inner middle of the second sedimentation tank;

[0007] The disassembly mechanism includes two rotatable mounting seat mechanisms, two lifting arms and two connecting plates. The rotatable mounting seat mechanisms are arranged on the sides of the first sedimentation tank and the second sedimentation tank, the lifting arm is arranged at the output end of each of the rotatable mounting seat mechanisms, the connecting plate is arranged at the top of each of the lifting arms, the connecting plate is perpendicular to the lifting arm, the two connecting plates are respectively connected to the top ends of the corresponding first cover plate and the second cover plate, the drawing plate is fixedly installed at the bottom of the first cover plate, the screen is fixedly installed in the middle of the drawing plate, and the filter plate is fixedly installed at the bottom of the second cover plate.

[0008] Among them, each of the rotatable mounting seat mechanisms includes a mounting base, a rotating assembly and a rotating disk. The mounting base is installed on the sides of the corresponding first sedimentation tank and the second sedimentation tank. The end face of the mounting base is provided with a mounting groove, and the end of the mounting groove is provided with a rotating bearing. The rotating disk is embedded in the rotating bearing, and the rotating assembly is provided in the mounting groove. The output end of the rotating assembly is mechanically transmitted with the rotating disk.

[0009] Wherein, each of the rotating components includes a driving motor and an output gear, and a driven tooth portion is provided on one side of each rotating disk located inside the mounting groove. The driving motor is installed inside the mounting groove, and the output gear is provided at the output end of the driving motor, and the output gear is meshed with the driven tooth portion.

[0010] Among them, each of the lifting arms includes a supporting column, an adjusting component and a connecting column, the supporting column and the connecting column are both arranged in a square structure, the supporting column and the connecting column are both arranged in a hollow structure, one end of the supporting column is connected to the upper surface of the rotating disk, the connecting column is slidingly arranged inside the other end of the supporting column, the connecting plate is arranged at the top end of the connecting column, the adjusting component is arranged at the inner bottom of the supporting column, and the output end of the adjusting component is connected to the inner bottom wall of the connecting column.

[0011] Among them, each of the adjustment components includes a first servo motor, a threaded rod and a ball screw nut pair, the first servo motor is installed on the inner bottom of the support column, the output end of the first servo motor is provided with the threaded rod, the ball screw nut pair is provided on the threaded rod, and the ball screw nut pair is connected to the inner bottom wall of the connecting column.

[0012] Wherein, a limiting block is arranged at one end of each threaded rod away from the corresponding first servo motor, and the limiting block is located inside the corresponding support column.

[0013] Among them, a first medicine box and a second medicine box are respectively arranged on both sides of the top of the balancing tank, and the bottoms of the first medicine box and the second medicine box are connected to the interior of the balancing tank through a delivery pipe, and each of the delivery pipes is provided with a liquid metering discharge valve.

[0014] Among them, the urban sewage treatment system also includes a waste collection trough, which is installed on the side of the two rotatable mounting seat mechanisms away from the first sedimentation tank and the second sedimentation tank. A translation guide rail group is arranged at the top of the waste collection trough away from the rotatable mounting seat, and a scraping rod is arranged at the output end of the translation guide rail group, and the scraping end of the scraping rod is located inside the waste collection trough.

[0015] Among them, the translation guide rail group includes a mounting guide rail, a sliding seat and a pushing assembly, the mounting guide rail is installed at the top end of the side of the waste collection trough away from the rotatable mounting seat mechanism, the sliding seat is slidably arranged on the mounting guide rail, the pushing assembly is arranged inside the mounting guide rail, the output end of the pushing assembly is connected to the sliding seat, and the scraping rod is arranged on the upper surface of the sliding seat.

[0016] Among them, the pushing assembly includes a second servo motor, a screw and a screw sleeve, the second servo motor is installed inside the mounting guide rail, the screw is arranged at the output end of the second servo motor, the screw is arranged on the screw, and the screw sleeve is connected to the sliding seat.

[0017] The urban sewage treatment system of the present invention is as follows: when sewage treatment is completed and the sludge in the first sedimentation tank and the second sedimentation tank is extracted, the lifting arm is started to drive the first cover plate and the second cover plate to rise through the connecting plate. Since the extraction plate is fixedly mounted on the bottom of the first cover plate and the filter plate is fixedly mounted on the bottom of the second cover plate, after the extraction plate and the filter plate are separated from the corresponding first sedimentation tank and the second sedimentation tank, the rotatable mounting seat mechanism is started to drive the lifting arm to rotate so that the extraction plate and the filter plate are separated from the corresponding first sedimentation tank and the second sedimentation tank. The lifting arm is reset to drive the extraction plate and the filter plate to descend, so that the staff can clean the extraction plate, the screen and the impurities attached to the filter plate. The above structure can be used to automatically complete the disassembly of the extraction plate, the screen and the filter plate, so that the subsequent cleaning of the extraction plate, the screen and the filter plate is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the urban sewage treatment system of the first embodiment of the present invention.

[0020] Figure 2 It is a front view of the urban sewage treatment system according to the first embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the internal structure of the first sedimentation tank and the second sedimentation tank in the first embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the disassembled structure of the rotatable mounting seat mechanism in the first embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the disassembled structure of the lifting arm of the second embodiment of the present invention.

[0024] Figure 6 It is a schematic structural diagram of an urban sewage treatment system according to a second embodiment of the present invention.

[0025] Figure 7 The present invention provides Figure 6 A magnified view of the local structure at A.

[0026] 101-first sedimentation tank, 102-second sedimentation tank, 103-balancing tank, 104-connecting plate, 105-mounting base, 106-rotating plate, 107-driving motor, 108-output gear, 109-support column, 110-connecting column, 111-first servo motor, 112-threaded rod, 113-ball screw nut pair, 114-first suction pump, 115-second suction pump, 116-first cover plate, 117-pumping plate, 118 -screen, 119-second cover plate, 120-filter plate, 121-first medicine box, 122-second medicine box, 123-delivery pipe, 124-liquid metering discharge valve, 125-installation groove, 126-rotating bearing, 127-driven gear, 128-limiting block, 201-waste collection tank, 202-scraper rod, 203-installation guide rail, 204-sliding seat, 205-second servo motor, 206-screw, 207-screw sleeve. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] First embodiment:

[0029] See also Figures 1 to 5 ,in Figure 1 is a schematic structural diagram of the urban sewage treatment system of the first embodiment, Figure 2 is a front view of the urban sewage treatment system of the first embodiment, Figure 3 is a schematic diagram of the internal structure of the first sedimentation tank and the second sedimentation tank in the first embodiment, Figure 4 is a schematic diagram of the disassembled structure of the rotatable mounting seat mechanism in the first embodiment, Figure 5 It is a schematic diagram of the disassembled structure of the lifting arm of the second embodiment.

[0030] The present invention provides a city sewage treatment system: comprising a first sedimentation tank 101, a second sedimentation tank 102, a balancing tank 103 and a disassembly mechanism, wherein the disassembly mechanism comprises two rotatable mounting seat mechanisms, two lifting arms and two connecting plates 104, each of the rotatable mounting seat mechanisms comprises a mounting base 105, a rotating assembly and a rotating disk 106, each of the rotating assembly comprises a driving motor 107 and an output gear 108, each of the lifting arms comprises a supporting column 109, an adjusting assembly and a connecting column 110, and each of the adjusting assembly comprises a first servo motor 111, a threaded rod 112 and a ball screw nut pair 113. The above-mentioned scheme solves the problem that there is no disassembly mechanism in the existing city sewage treatment system, and the staff needs to manually remove the cover plate from the top of the corresponding sedimentation tank, and then remove the screen 118, the draw plate 117 and the filter from the inside of the corresponding sedimentation tank, which is not convenient to operate. It can be understood that the above-mentioned scheme can be used in the structure of the city sewage treatment system.

[0031] According to the present specific embodiment, a first suction pump 114 is provided between the first sedimentation tank 101 and the second sedimentation tank 102, a second suction pump 115 is provided between the second sedimentation tank 102 and the balancing tank 103, a first cover plate 116 is provided at the top of the first sedimentation tank 101, a pumping plate 117 is vertically provided in the inner middle of the first sedimentation tank 101, a screen 118 is provided on the pumping plate 117, a second cover plate 119 is provided at the top of the second sedimentation tank 102, a filter plate 120 is vertically provided in the inner middle of the second sedimentation tank 102, a first medicine box 121 and a second medicine box 122 are respectively provided on both sides of the top of the balancing tank 103, the bottoms of the first medicine box 121 and the second medicine box 122 are both connected to the interior of the balancing tank 103 through a delivery pipe 123, and each of the delivery pipes 123 is provided with a liquid metering discharge valve 124, which is used to introduce liquid into the first sedimentation tank 101 The wastewater to be treated is intercepted by the horizontal screen 118 to retain large floating objects on the upper layer of the screen 118, and then the preliminarily treated sewage enters the filter section of the pumping plate 117, leaving large particles of sludge on the lower layer of the screen 118. The sewage reaches the second sedimentation tank 102 through the first suction pump 114, and small particles of impurities are filtered out through the vertical filter plate 120. Finally, the sewage is transported to the balancing tank 103 through the second suction pump 115. The user opens the corresponding liquid metering discharge valve 124 according to the measured pH value, and quantitatively adds the acidic reagent or alkaline reagent in the first reagent box 121 and the second reagent box 122 into the balancing tank 103 until the pH value of the sewage in the balancing tank 103 reaches 7. Finally, the treated wastewater is discharged from the balancing tank 103, and the sludge in the first sedimentation tank 101 and the second sedimentation tank 102 is extracted to complete the treatment of urban sewage.

[0032] Wherein, the rotatable mounting seat mechanism is disposed on the side of the first sedimentation tank 101 and the second sedimentation tank 102, the output end of each rotatable mounting seat mechanism is disposed with the lifting arm, the top of each lifting arm is disposed with the connecting plate 104, the connecting plate 104 is perpendicular to the lifting arm, the two connecting plates 104 are respectively connected to the top of the corresponding first cover plate 116 and the second cover plate 119, the pumping plate 117 is fixedly mounted on the bottom of the first cover plate 116, the screen 118 is fixedly mounted in the middle of the pumping plate 117, and the filter plate 120 is fixedly mounted on the bottom of the second cover plate 119. When the sewage treatment is completed and the sludge in the first sedimentation tank 101 and the second sedimentation tank 102 is extracted, the lifting arm is started to drive the first cover plate 116 and the second cover plate 119 to rise through the connecting plate 104. The draw plate 117 is fixedly mounted on the bottom of the first cover plate 116, and the filter plate 120 is fixedly mounted on the bottom of the second cover plate 119, so that after the draw plate 117 and the filter plate 120 are separated from the corresponding first sedimentation tank 101 and the second sedimentation tank 102, the rotatable mounting seat mechanism is started to drive the lifting arm to rotate, so that the draw plate 117 and the filter plate 120 are separated from the corresponding first sedimentation tank 101 and the second sedimentation tank 102, and the lifting arm is reset to drive the draw plate 117 and the filter plate 120 to descend, so that the staff can clean the impurities attached to the draw plate 117, the screen 118 and the filter plate 120. With the above structure, the disassembly of the draw plate 117, the screen 118 and the filter plate 120 can be automatically completed, so that the subsequent cleaning of the draw plate 117, the screen 118 and the filter plate 120 is convenient.

[0033] Secondly, the mounting base 105 is installed on the sides of the corresponding first sedimentation tank 101 and the second sedimentation tank 102, and the end face of the mounting base 105 is provided with a mounting groove 125, and the end of the mounting groove 125 is provided with a rotating bearing 126, and the rotating disk 106 is embedded in the rotating bearing 126. Each rotating disk 106 is provided with a driven tooth portion 127 on one side located inside the mounting groove 125, and the driving motor 107 is installed inside the mounting groove 125. The output end of the driving motor 107 is provided with the output gear 108, and the output gear 108 is meshed with the driven tooth portion 127. When the driving motor 107 is started, the output gear 108 is driven to rotate. Since the output gear 108 is meshed with the driven tooth portion 127, the rotating disk 106 is driven to rotate at the end of the mounting groove 125, and due to the provision of the rotating bearing 126, the rotating disk 106 rotates more smoothly.

[0034] At the same time, the support column 109 and the connecting column 110 are both arranged in a square structure, and the support column 109 and the connecting column 110 are both arranged in a hollow structure. One end of the support column 109 is connected to the upper surface of the rotating disk 106, and the connecting column 110 is slidably arranged inside the other end of the support column 109. The top of the connecting column 110 is provided with the connecting plate 104. The first servo motor 111 is installed on the inner bottom of the support column 109, and the output end of the first servo motor 111 is provided with the threaded rod 112, and the threaded rod 112 is provided with the ball screw nut pair 113, and the ball screw nut pair 113 is connected to the inner bottom wall of the connecting column 110. When the first servo motor 111 is started, the threaded rod 112 is driven to rotate. Since the ball screw nut pair 113 is connected to the inner bottom wall of the connecting column 110, the connecting column 110 is driven to slide inside the support column 109 to complete the adjustment of the height of the connecting plate 104.

[0035] In addition, a limit block 128 is provided at one end of each threaded rod 112 away from the corresponding first servo motor 111. The setting of the limit block 128 prevents the ball screw nut pair 113 from falling off the threaded rod 112, and since the limit block 128 is located inside the corresponding support column 109, the connecting column 110 is prevented from falling off from the inside of the support column 109.

[0036] When using the municipal sewage treatment system of the present embodiment, the wastewater to be treated is introduced into the first sedimentation tank 101, and the large floating objects are intercepted on the upper layer of the screen 118 by the horizontal screen 118. Then, the preliminarily treated sewage enters the filter section of the suction plate 117, and the large particles of sludge are retained in the lower layer of the screen 118. The sewage reaches the second sedimentation tank 102 through the first suction pump 114, and the small particles of impurities are filtered out by the vertical filter plate 120, and finally the sewage is discharged through the second suction pump 117. 5. The sewage is transported to the balancing tank 103. The user opens the corresponding liquid metering discharge valve 124 according to the measured pH value, and quantitatively adds the acidic reagent or alkaline reagent in the first reagent box 121 and the second reagent box 122 into the balancing tank 103 until the pH value of the sewage in the balancing tank 103 reaches 7. Finally, the treated wastewater is discharged from the balancing tank 103, and the sludge in the first sedimentation tank 101 and the second sedimentation tank 102 is extracted to complete the treatment of urban sewage. The lifting arm is started to drive the first cover plate 116 and the second cover plate 119 to rise through the connecting plate 104. Since the pumping plate 117 is fixedly installed on the bottom of the first cover plate 116, and the filter plate 120 is fixedly installed on the bottom of the second cover plate 119, after the pumping plate 117 and the filter plate 120 are separated from the corresponding first sedimentation tank 101 and the second sedimentation tank 102, the rotatable mounting seat mechanism is started to drive the lifting arm to rotate, so that the pumping plate 117 and the filter plate 120 are The plate 120 is away from the corresponding first sedimentation tank 101 and the second sedimentation tank 102, and the lifting arm is reset, driving the draw plate 117 and the filter plate 120 to descend, so that the staff can clean the impurities attached to the draw plate 117, the screen 118 and the filter plate 120. The above structure can automatically complete the disassembly of the draw plate 117, the screen 118 and the filter plate 120, so as to facilitate the subsequent cleaning of the draw plate 117, the screen 118 and the filter plate 120.

[0037] Second embodiment:

[0038] Based on the first embodiment, please refer to Figure 6 and Figure 7 , Figure 6 is a schematic structural diagram of a municipal sewage treatment system according to a second embodiment, Figure 7 for Figure 6 A magnified view of the local structure at A.

[0039] The present invention provides a municipal sewage treatment system which also includes a waste collection tank 201 .

[0040] According to this specific embodiment, the waste collection trough 201 is installed on the side of the two rotatable mounting seat mechanisms away from the first sedimentation tank 101 and the second sedimentation tank 102, and a translation guide rail group is provided at the top of the waste collection trough 201 away from the rotatable mounting seat. A scraping rod 202 is provided at the output end of the translation guide rail group, and the scraping end of the scraping rod 202 is located inside the waste collection trough 201. Through the setting of the waste collection trough 201, impurities attached to the screen 118, the pumping plate 117 and the filter plate 120 are cleaned inside the waste collection trough 201 to reduce pollution to the working environment, and through the setting of the translation guide rail group, the scraping rod 202 is driven to scrape inside the waste collection trough 201 to avoid the cleaned impurities from being concentrated and accumulated inside the waste collection trough 201, so that the waste collection trough 201 can collect more impurities.

[0041] The translation guide rail assembly includes a mounting rail 203, a sliding seat 204 and a pushing assembly. The mounting rail 203 is mounted on the top of the waste collection tank 201 away from the rotatable mounting seat mechanism. The sliding seat 204 is slidably arranged on the mounting rail 203. The pushing assembly is arranged inside the mounting rail 203. The pushing assembly includes a second servo motor 205, a screw rod 206 and a screw rod sleeve 207. The second servo motor 205 is mounted on the mounting rail 203. Inside, the output end of the second servo motor 205 is provided with the screw rod 206, and the screw rod sleeve 207 is provided on the screw rod 206. The screw rod sleeve 207 is connected to the sliding seat 204. The second servo motor 205 is started to drive the screw rod 206 to rotate. Since the screw rod sleeve 207 is connected to the sliding seat 204, the sliding seat 204 is driven to slide on the mounting guide rail 203, thereby driving the scraping rod 202 to scrape the inside of the waste collection tank 201.

[0042] When using a city sewage treatment system of the present embodiment, through the setting of the waste collection tank 201, the impurities attached to the screen 118, the pumping plate 117 and the filter plate 120 are cleaned inside the waste collection tank 201, reducing pollution to the working environment, and the second servo motor 205 can be started to drive the screw rod 206 to rotate. Since the screw rod sleeve 207 is connected to the sliding seat 204, the sliding seat 204 is driven to slide on the mounting guide rail 203, and then the scraping rod 202 is driven to scrape inside the waste collection tank 201, avoiding the cleaned impurities from being concentrated and accumulated inside the waste collection tank 201, so that the waste collection tank 201 can collect more impurities.

[0043] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A municipal sewage treatment system, comprising a first sedimentation tank, a second sedimentation tank and a balancing tank, wherein a first suction pump is arranged between the first sedimentation tank and the second sedimentation tank, a second suction pump is arranged between the second sedimentation tank and the balancing tank, a first cover plate is arranged at the top of the first sedimentation tank, a pumping plate is arranged vertically in the middle of the first sedimentation tank, a screen is arranged on the pumping plate, a second cover plate is arranged at the top of the second sedimentation tank, and a filter plate is arranged vertically in the middle of the second sedimentation tank, characterized in that: Also includes a disassembly mechanism; The disassembly mechanism includes two rotatable mounting seat mechanisms, two lifting arms and two connecting plates. The rotatable mounting seat mechanisms are arranged on the sides of the first sedimentation tank and the second sedimentation tank, the lifting arm is arranged at the output end of each of the rotatable mounting seat mechanisms, the connecting plate is arranged at the top of each of the lifting arms, the connecting plate is perpendicular to the lifting arm, the two connecting plates are respectively connected to the top ends of the corresponding first cover plate and the second cover plate, the drawing plate is fixedly installed at the bottom of the first cover plate, the screen is fixedly installed in the middle of the drawing plate, and the filter plate is fixedly installed at the bottom of the second cover plate.

2. The urban sewage treatment system according to claim 1, characterized in that: Each of the rotatable mounting seat mechanisms includes a mounting base, a rotating assembly and a rotating disk. The mounting base is mounted on the sides of the corresponding first sedimentation tank and the second sedimentation tank. The end face of the mounting base is provided with a mounting groove. The end of the mounting groove is provided with a rotating bearing. The rotating disk is embedded in the rotating bearing. The rotating assembly is provided in the mounting groove. The output end of the rotating assembly is mechanically transmitted to the rotating disk.

3. The urban sewage treatment system according to claim 2, characterized in that: Each of the rotating components includes a driving motor and an output gear. A driven tooth portion is provided on one side of each rotating disk located inside the mounting groove. The driving motor is installed inside the mounting groove. The output end of the driving motor is provided with the output gear, and the output gear is meshed with the driven tooth portion.

4. The urban sewage treatment system according to claim 3, characterized in that: Each lifting arm includes a supporting column, an adjusting component and a connecting column. The supporting column and the connecting column are both arranged in a square structure and a hollow structure. One end of the supporting column is connected to the upper surface of the rotating disk, and the connecting column is slidingly arranged inside the other end of the supporting column. The connecting plate is arranged at the top of the connecting column, and the adjusting component is arranged at the inner bottom of the supporting column. The output end of the adjusting component is connected to the inner bottom wall of the connecting column.

5. The urban sewage treatment system according to claim 4, characterized in that: Each of the adjustment components includes a first servo motor, a threaded rod and a ball screw nut pair. The first servo motor is installed on the inner bottom of the support column. The output end of the first servo motor is provided with the threaded rod, and the ball screw nut pair is provided on the threaded rod. The ball screw nut pair is connected to the inner bottom wall of the connecting column.

6. The urban sewage treatment system according to claim 5, characterized in that: A limiting block is arranged at one end of each threaded rod away from the corresponding first servo motor, and the limiting block is located inside the corresponding support column.

7. The urban sewage treatment system according to claim 1, characterized in that: A first medicine box and a second medicine box are respectively arranged on both sides of the top of the balancing tank. The bottoms of the first medicine box and the second medicine box are connected to the interior of the balancing tank through a delivery pipe, and each of the delivery pipes is provided with a liquid metering discharge valve.

8. The urban sewage treatment system according to claim 1, characterized in that: The urban sewage treatment system also includes a waste collection trough, which is installed on the side of the two rotatable mounting seat mechanisms away from the first sedimentation tank and the second sedimentation tank. A translation guide rail group is provided at the top of the waste collection trough away from the rotatable mounting seat, and a scraping rod is provided at the output end of the translation guide rail group. The scraping end of the scraping rod is located inside the waste collection trough.

9. The urban sewage treatment system according to claim 8, characterized in that: The translation guide rail group includes a mounting guide rail, a sliding seat and a pushing assembly. The mounting guide rail is installed at the top end of the waste collection trough on a side away from the rotatable mounting seat mechanism. The sliding seat is slidably arranged on the mounting guide rail. The pushing assembly is arranged inside the mounting guide rail. The output end of the pushing assembly is connected to the sliding seat. The upper surface of the sliding seat is provided with the scraping rod.

10. The urban sewage treatment system according to claim 9, characterized in that: The pushing assembly includes a second servo motor, a screw and a screw sleeve. The second servo motor is installed inside the mounting guide rail. The output end of the second servo motor is provided with the screw. The screw sleeve is provided on the screw, and the screw sleeve is connected to the sliding seat.

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