Municipal sewage pretreatment device

Abstract

The invention relates to the technical field of sewage pretreatment, in particular to a municipal sewage pretreatment device which comprises a device shell, a first rotating cylinder and a second rotating cylinder rotationally penetrate through the two ends of the device shell respectively, and connecting rings are fixedly connected to the ends, close to each other, of the first rotating cylinder and the second rotating cylinder; a filtering device is fixedly connected between the two connecting rings, a rotating mechanism is arranged at one end of the device shell, a reverse osmosis cleaning mechanism is arranged in the device shell, and a separating and cutting mechanism is arranged on a second rotating cylinder. The rotating mechanism is used for rotating the connecting ring and the filtering device and reducing the contact time between impurities in the sewage and the filtering device; according to the invention, the contact time between impurities in sewage and the filter device can be reduced, so that the floating and flowing time of the impurities is prolonged, the impurities are prevented from being quickly accumulated on the filter device, and the service life of the filter device can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage pretreatment, and in particular to a municipal sewage pretreatment device. Background Art

[0002] Municipal sewage refers to wastewater generated by urban residents in their daily lives, commercial activities, industrial production, etc., including domestic sewage. Domestic sewage often contains a large amount of hair, domestic garbage and other debris. If these impurities are directly treated, the load on the filtration equipment is relatively high and cannot be treated efficiently. Therefore, this type of sewage needs to be pretreated to reduce the load for subsequent treatment.

[0003] In the prior art, when pre-treating debris such as hair and household garbage in sewage, the sewage is generally passed through a filter element, which then filters and intercepts the debris. Since the filter element is stationary, the debris will quickly adhere to the surface of the filter element along the flow direction of the sewage, causing the debris to quickly accumulate on the filter element, thereby shortening the service life of the filter element. In addition, some hair among the debris is extremely easy to clump or entangle on the filter element, causing blockage and further shortening the service life of the filter element. After the filtration process, the residue on the filter element is generally scraped and cleaned by a cleaning plate. However, since the surface of the residue is wet and adheres to the filter element, the cleaning plate cannot completely clean the residue, resulting in poor cleaning effect, which further affects the use effect of the filter element. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a municipal sewage pretreatment device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a municipal sewage pretreatment device, comprising a device housing, wherein a first rotating drum and a second rotating drum are respectively rotatably penetrated at both ends of the device housing, the first rotating drum and the second rotating drum being fixedly connected to each other at one end close to each other with a connecting ring, a filter element being fixedly connected between the two connecting rings, a rotating mechanism being provided at one end of the device housing, a reverse osmosis cleaning mechanism being provided inside the device housing, and a separating and cutting mechanism being provided on the second rotating drum; The rotating mechanism is used to rotate the connecting ring and the filter element, thereby reducing the contact time between impurities in the sewage and the filter element, increasing the time for the impurities to float and flow, and extending the service life of the filter element; The separation and cutting mechanism includes a sealing disk, one end of the sealing disk is fixedly connected to a second motor, the driving end of the second motor is fixedly connected to a cutting shaft, and the outer wall of the cutting shaft is fixedly connected to a plurality of evenly arranged cutting blades, and the cutting blades are used to cut impurities, reduce the overall volume of the impurities, and further increase the time for the impurities to float and flow.

[0006] Preferably, the rotating mechanism includes a first motor fixedly connected to one side of the rotating cylinder at one end of the device housing, the driving end of the first motor is fixedly connected to a driving shaft, the outer wall of the driving shaft is fixedly connected to a gear, the outer diameter of the gear is meshed with an outer gear ring, and the outer gear ring is fixedly connected to the rotating cylinder.

[0007] Preferably, the separation mechanism also includes a fixing frame fixedly connected to the four sides of the second motor corresponding to one end of the sealing disk, and the four fixing frames are fixedly connected to an ultrasonic cavitation mechanism. The ultrasonic cavitation mechanism can split water molecules to produce strong oxidizing substances such as hydroxyl free radicals, thereby degrading organic pollutants in sewage.

[0008] Preferably, the reverse osmosis cleaning mechanism includes connecting blocks fixedly connected to both sides of the inner wall of the device shell, and the number of the connecting blocks is set to two groups. A cleaning barrel is fixedly connected between the two groups of connecting blocks, and a discharge outlet is opened at the bottom end of the cleaning barrel.

[0009] Preferably, the reverse osmosis cleaning mechanism further comprises a vertical plate fixedly connected to the top of the device housing, one end of the vertical plate is fixedly connected to a water pump, and the water pump and the cleaning bucket are connected by a pipe and pass through the device housing.

[0010] Preferably, the reverse osmosis cleaning mechanism also includes horizontal blocks fixedly connected to the bottom of both ends of the cleaning barrel, hydraulic rods are fixedly passed through the two horizontal blocks, the telescopic ends of the two hydraulic rods are fixedly connected to connecting plates, and a sealing plate is fixedly connected between the two connecting plates, and the sealing plate is used to cover the discharge outlet.

[0011] Preferably, a percussion vibration mechanism is provided between the cleaning bucket and the connecting ring, and the percussion vibration mechanism includes elastic columns fixedly connected to both sides of the top of the inner wall of the cleaning bucket, the bottom ends of the two elastic columns are fixedly connected to percussion balls, and the two connecting rings are fixedly connected to a plurality of evenly arranged triangular blocks at one end away from each other.

[0012] Preferably, a plurality of evenly arranged reinforcement rods are fixedly connected to the outer sides of the corresponding filter elements between the two connecting rings.

[0013] Preferably, an L-shaped plate is fixedly connected to one end of the device casing corresponding to the top of the rotating cylinder, and a fixed disk is fixedly connected to the other end of the L-shaped plate. The fixed disk and the rotating cylinder are rotatably connected, and a feed pipe is fixedly passed through the end of the fixed disk away from the device casing, and a horizontal plate is fixedly connected to the top of the outer wall of the feed pipe, and the horizontal plate and the L-shaped plate are fixedly connected, and an electromagnetic valve is installed on the feed pipe.

[0014] Preferably, the other end of the device shell is fixedly connected to both sides of the rotating cylinder 2, and the telescopic ends of the two electric push rods are fixedly connected to fixed blocks, and the two fixed blocks are fixedly connected to the sealing disk. The other end of the device shell is fixedly connected to the outer side of the rotating cylinder 2, and the other ends of the multiple connecting columns are fixedly connected to a fixing ring, which is rotatably connected to the rotating cylinder 2. A sealing groove is provided at the end of the fixing ring away from the device shell, and a sealing ring that matches the shape of the sealing groove is fixedly connected to the end of the sealing disk close to the device shell.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The rotating mechanism can rotate the filter element when filtering impurities in the sewage, thereby reducing the contact time between the impurities in the sewage and the filter element, thereby increasing the floating flow time of the impurities, preventing the impurities from quickly accumulating on the filter element, and thus extending the service life of the filter element; The separation and cutting mechanism can cut impurities in the sewage during the filtration process, especially hair impurities that are easy to clump and entangle. Therefore, long hair can be cut into shorter ones, reducing the volume, increasing the floating flow time of impurities, slowing down the accumulation speed, and reducing the load for subsequent treatment. The reverse osmosis cleaning mechanism can flush out impurities attached to the filter element through reverse osmosis after the sewage treatment is completed. During the flushing process, the filter element rotates synchronously, so the impurities attached to the filter element can be thrown off. At the same time, the cutting blade rotates, causing the water flow to rotate, thereby improving the cleaning effect. The knocking vibration mechanism can make the filter element vibrate during the cleaning process without providing additional power. The knocking vibration effect is cleverly achieved through structural innovation by utilizing the rotation of the rotating barrel, which is energy-saving and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a municipal sewage pretreatment device according to the present invention; Figure 2 This is a top perspective view of a municipal sewage pretreatment device according to the present invention from another perspective; Figure 3This is a bottom perspective view of a municipal sewage pretreatment device according to the present invention; Figure 4 This is a cross-sectional view of a device housing of a municipal sewage pretreatment device according to the present invention; Figure 5 This is a cross-sectional view of a cleaning barrel of a municipal sewage pretreatment device according to the present invention; Figure 6 This is a cross-sectional view of a rotating drum 1, a rotating drum 2, a connecting ring, and a filter element of a municipal sewage pretreatment device according to the present invention; Figure 7 This is a partial structural separation diagram of a municipal sewage pretreatment device according to the present invention; Figure 8 This is a partial structural separation diagram of a municipal sewage pretreatment device according to the present invention from another perspective.

[0017] In the figure: 1. device housing; 2. sealing disk; 3. fixing ring; 4. water pump; 5. vertical plate; 6. L-shaped plate; 7. horizontal plate; 8. feed pipe; 9. solenoid valve; 10. fixing disk; 11. outer gear ring; 12. gear; 13. drive shaft; 14. first motor; 15. rotating cylinder one; 16. electric push rod; 17. connecting column; 18. rotating cylinder two; 19. fixing frame; 20. ultrasonic cavitation mechanism; 21. second motor; 22. fixing block; 23. hydraulic rod; 24. connecting plate; 25. sealing plate; 26. discharge port; 27. cleaning barrel; 28. connecting block; 29. horizontal block; 30. connecting ring; 31. elastic column; 32. knocking ball; 33. triangular block; 34. filter element; 35. reinforcement rod; 36. cutting shaft; 37. cutting blade; 38. sealing ring; 39. sealing groove. DETAILED DESCRIPTION

[0018] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0019] like Figures 1-8A municipal sewage pretreatment device shown in the figure includes a device housing 1, with a rotating drum 15 and a rotating drum 2 18 rotatingly passing through both ends of the device housing 1 respectively, and a connecting ring 30 fixedly connected to the rotating drum 15 and the rotating drum 2 18 at one end close to each other, and a filter element 34 fixedly connected between the two connecting rings 30. A rotating mechanism is provided at one end of the device housing 1, and a reverse osmosis cleaning mechanism is provided inside the device housing 1. A separating and cutting mechanism is provided on the rotating drum 2 18. The rotating mechanism can reduce the contact time between impurities in the sewage and the filter element 34 during sewage treatment, thereby increasing the floating flow time of impurities and preventing impurities from quickly accumulating on the filter element 34. The reverse osmosis cleaning mechanism can flush impurities on the filter element 34, thereby improving the cleaning effect. The separating and cutting mechanism can cut longer impurities, thereby reducing the overall volume and weight and slowing down the accumulation speed. like Figure 1 As shown, the rotating mechanism is used to rotate the connecting ring 30 and the filter element 34, thereby reducing the contact time between impurities in the sewage and the filter element 34, increasing the time for the impurities to float and flow, and extending the service life of the filter element 34; like Figure 2 、 Figure 6 As shown, the separation and cutting mechanism includes a sealing disk 2, one end of the sealing disk 2 is fixedly connected to a second motor 21, a driving end of the second motor 21 is fixedly connected to a cutting shaft 36, and an outer wall of the cutting shaft 36 is fixedly connected to a plurality of evenly arranged cutting blades 37. The cutting blades 37 can cut impurities in the sewage during the filtration process, especially hair-like impurities that are easy to clump and entangle. Therefore, longer hair can be cut into shorter ones, reducing the volume, increasing the floating flow time of impurities, slowing down the accumulation speed, and reducing the load for subsequent processing; reducing the overall volume of impurities and further increasing the floating flow time of impurities.

[0020] like Figure 1 As shown, the rotating mechanism includes a first motor 14 fixedly connected to one end of the device housing 1, corresponding to the side of the rotating drum 15. The driving end of the first motor 14 is fixedly connected to the drive shaft 13. The outer wall of the drive shaft 13 is fixedly connected to a gear 12. The outer diameter of the gear 12 is meshed with an outer gear ring 11, and the outer gear ring 11 is fixedly connected to the rotating drum 15. The first motor 14 rotates the drive shaft 13, which in turn rotates the gear 12. The gear 12 rotates the rotating drum 15, causing the filter element 34 to rotate. This can improve the treatment efficiency of sewage treatment and enhance the removal of impurities.

[0021] like Figure 2 、 Figure 6As shown, the separation mechanism also includes a fixing frame 19 fixedly connected to the four sides of the second motor 21 corresponding to one end of the sealing disk 2. The four fixing frames 19 are fixedly connected to an ultrasonic cavitation mechanism 20. The ultrasonic cavitation mechanism 20 can split water molecules to produce strong oxidizing substances such as hydroxyl free radicals, thereby degrading organic pollutants in sewage.

[0022] like Figure 3 、 Figure 4 、 Figure 5 As shown, the reverse osmosis cleaning mechanism includes connecting blocks 28 fixedly connected to both sides of the inner wall of the device casing 1, and the number of connecting blocks 28 is set in two groups. A cleaning bucket 27 is fixedly connected between the two groups of connecting blocks 28, and a discharge outlet 26 is provided at the bottom end of the cleaning bucket 27. The reverse osmosis cleaning mechanism also includes a vertical plate 5 fixedly connected to the top of the device casing 1, and one end of the vertical plate 5 is fixedly connected to the water pump 4. The water pump 4 and the cleaning bucket 27 are connected by a pipe and pass through the device casing 1. The reverse osmosis cleaning mechanism also includes a horizontal block 29 fixedly connected to the bottom of both ends of the cleaning bucket 27, and a hydraulic rod 23 is fixedly passed through the two horizontal blocks 29. The telescopic ends of the two hydraulic rods 23 are fixedly connected to a connecting plate 24, and a sealing plate 25 is fixedly connected between the two connecting plates 24. The sealing plate 25 is used to cover the discharge outlet 26. When sewage is being treated, the discharge outlet 26 is in an open state. When the filter element 34 needs to be cleaned, the hydraulic rod 23 is controlled by the synchronous controller to move the connecting plate 24 upward, so that the blocking plate 25 can cover the discharge outlet 26 to complete the sealing process. After that, cleaning water is injected into the cleaning barrel 27 through the water pump 4, so that the filter element 34 can be reversely penetrated and impurities on the filter element 34 can be washed off, thereby improving the cleaning effect.

[0023] like Figure 5 As shown, a percussion vibration mechanism is provided between the cleaning barrel 27 and the connecting ring 30. The percussion vibration mechanism includes elastic columns 31 fixedly connected to both sides of the top of the inner wall of the cleaning barrel 27. The bottom ends of the two elastic columns 31 are fixedly connected to percussion balls 32. The ends of the two connecting rings 30 facing away from each other are fixedly connected to a plurality of evenly arranged triangular blocks 33. A plurality of evenly arranged reinforcement rods 35 are fixedly connected to the outer sides of the corresponding filter elements 34 between the two connecting rings 30. During the cleaning process, the connecting ring 30 rotates, and the percussion balls 32 pass through the inclined surfaces of the triangular blocks 33, causing the elastic columns 31 to deform. When the percussion balls 32 leave the inclined surfaces of the triangular blocks 33, the resetting action of the elastic columns 31 causes the percussion balls 32 to strike the connecting ring 30, generating vibrations. This can vibrate impurities off the filter elements 34, thereby further improving the cleaning effect.

[0024] like Figure 4As shown, an L-shaped plate 6 is fixedly connected to one end of the device housing 1, corresponding to the top of the rotating drum 15. The other end of the L-shaped plate 6 is fixedly connected to a fixed disk 10. The fixed disk 10 and the rotating drum 15 are rotatably connected. A feed pipe 8 is fixedly passed through the end of the fixed disk 10 away from the device housing 1. A horizontal plate 7 is fixedly connected to the top of the outer wall of the feed pipe 8. The horizontal plate 7 is fixedly connected to the L-shaped plate 6. A solenoid valve 9 is installed on the feed pipe 8. Because the fixed disk 10 is rotatably connected to the rotating drum 15, it does not affect the rotation of the rotating drum 15. The fixed disk 10 is fixed to the device housing 1 by the L-shaped plate 6, and the feed pipe 8 is limited and fixed by the horizontal plate 7. The solenoid valve 9 can control the feeding of the feed pipe 8.

[0025] like Figure 2 、 Figure 4 、 Figure 7 、 Figure 8 As shown, the other end of the device housing 1 is fixedly connected to both sides of the rotating cylinder 2 18 with electric push rods 16, and the telescopic ends of the two electric push rods 16 are fixedly connected to fixed blocks 22, and the two fixed blocks 22 are fixedly connected to the blocking disk 2. The other end of the device housing 1 is fixedly connected to the outside of the rotating cylinder 2 18 with multiple evenly arranged connecting columns 17, and the other ends of the multiple connecting columns 17 are fixedly connected to the fixing ring 3. The fixing ring 3 is rotatably connected to the rotating cylinder 2 18. The end of the fixing ring 3 away from the device housing 1 is provided with a sealing groove 39, and the end of the blocking disk 2 close to the device housing 1 is fixedly connected to a sealing ring 38 that matches the shape of the sealing groove 39. The electric push rod 16 is controlled by a synchronous controller to work synchronously, and moves back and forth with the fixing block 22, and at the same time, moves back and forth with the blocking disk 2, so that the rotating cylinder 2 18 can be blocked, and the cooperation of the sealing groove 39 and the sealing ring 38 can improve the sealing effect and avoid leakage.

[0026] Working principle: By filtering and pre-treating the impurities in the sewage, first open the solenoid valve 9 and allow the sewage to flow into the rotating drum 15 through the feed pipe 8. At this time, start the first motor 14 to rotate the drive shaft 13, the drive shaft 13 rotates the gear 12, and the gear 12 rotates the outer gear ring 11, so that the rotating drum 15 can be rotated. At this time, the reinforcing rod 35 can make the rotating drum 15, the connecting ring 30, the filter element 34 and the rotating drum 2 18 rotate synchronously. Therefore, when filtering the sewage, the contact time between the impurities and the filter element 34 can be reduced, thereby increasing the time for the impurities to float and flow, and avoiding the impurities from accumulating quickly on the filter element 34. At the same time, start the second motor 21 to rotate the cutting shaft 36, and the cutting shaft 36 rotates the cutting blade 37, which can cut off the longer impurities in the sewage. At the same time, start the ultrasonic cavitation mechanism 20 to decompose the water molecules to produce strong oxidizing substances such as hydroxyl free radicals, degrading the organic pollutants in the sewage, thereby further enhancing the treatment effect of organic pollutants such as hair, while reducing the load of subsequent treatment equipment.

[0027] After the sewage pretreatment is completed, hair will accumulate on the inner wall of the filter element 34. At this time, the hydraulic rod 23 is controlled by the synchronous controller to move the connecting plate 24 upward, and the blocking plate 25 covers the discharge port 26. At the same time, the solenoid valve 9 is closed and the electric push rod 16 is started to push the fixed block 22 and the blocking disk 2 to move, and the sealing ring 38 and the sealing groove 39 are separated. Then, the cleaning water is injected into the cleaning barrel 27 through the water pump 4 and filled. At this time, a positive pressure effect is generated in the cleaning barrel 27, and the positive pressure causes the cleaning water to reversely penetrate the filter element 34 and wash away the impurities on the inner wall of the filter element 34. Since the device housing 1 is in a tilted state, the cleaning water is discharged through the rotating cylinder 2 18 at this time. During the cleaning process, The rotating drum 1 15, the reinforcing rod 35, the connecting ring 30 and the rotating drum 2 18 rotate at the same time and are in a low-speed state. With the cooperation of the cleaning water, impurities can be better shaken off the filter element 34. At the same time, since the filter element 34 is in a tilted downward state, hair and water are better cleaned off. At the same time, when the connecting ring 30 rotates, the knocking ball 32 passes over the triangular block 33. At this time, the elastic column 31 bends. When the knocking ball 32 leaves the inclined surface of the triangular block 33, the resetting effect of the elastic column 31 causes the knocking ball 32 to knock on the connecting ring 30 and generate vibration. The vibration can shake off the impurities on the filter element 34, further improve the cleaning effect, and extend the service life of the filter element 34.

[0028] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A municipal sewage pretreatment device, comprising a device housing (1), characterized in that: The two ends of the device housing (1) are respectively rotatably penetrated by a rotating cylinder 1 (15) and a rotating cylinder 2 (18), the rotating cylinder 1 (15) and the rotating cylinder 2 (18) are fixedly connected to a connecting ring (30) at one end close to each other, and a filter element (34) is fixedly connected between the two connecting rings (30), a rotating mechanism is provided at one end of the device housing (1), a reverse osmosis cleaning mechanism is provided inside the device housing (1), and a separating and cutting mechanism is provided on the rotating cylinder 2 (18); The rotating mechanism is used to rotate the connecting ring (30) and the filter element (34), thereby reducing the contact time between impurities in the sewage and the filter element (34), increasing the floating flow time, and extending the service life of the filter element (34); The separation and cutting mechanism comprises a blocking disk (2), one end of the blocking disk (2) is fixedly connected to a second motor (21), a driving end of the second motor (21) is fixedly connected to a cutting shaft (36), an outer wall of the cutting shaft (36) is fixedly connected to a plurality of evenly arranged cutting blades (37), and the cutting blades (37) are used to cut impurities, thereby reducing the overall volume of the impurities and further increasing the floating flow time of the impurities.

2. A municipal sewage pretreatment device according to claim 1, characterized in that: The rotating mechanism comprises a first motor (14) fixedly connected to one end of the device housing (1) corresponding to one side of the rotating cylinder (15), the driving end of the first motor (14) is fixedly connected to a driving shaft (13), the outer wall of the driving shaft (13) is fixedly connected to a gear (12), the outer diameter of the gear (12) is meshedly connected to an outer gear ring (11), and the outer gear ring (11) is fixedly connected to the rotating cylinder (15).

3. A municipal sewage pretreatment device according to claim 1, characterized in that: The separation mechanism further comprises a fixing frame (19) fixedly connected to four sides of the second motor (21) corresponding to one end of the blocking disk (2), and each of the four fixing frames (19) is fixedly connected to an ultrasonic cavitation mechanism (20). The ultrasonic cavitation mechanism (20) can cause water molecules to split to produce strong oxidizing substances such as hydroxyl free radicals, thereby degrading organic pollutants in the sewage.

4. A municipal sewage pretreatment device according to claim 1, characterized in that: The reverse osmosis cleaning mechanism comprises connecting blocks (28) fixedly connected to both sides of the inner wall of the device housing (1), wherein the connecting blocks (28) are provided in two groups, and a cleaning bucket (27) is fixedly connected between the two groups of connecting blocks (28), and a discharge outlet (26) is provided at the bottom end of the cleaning bucket (27).

5. A municipal sewage pretreatment device according to claim 4, characterized in that: The reverse osmosis cleaning mechanism further comprises a vertical plate (5) fixedly connected to the top of the device housing (1), one end of the vertical plate (5) is fixedly connected to a water pump (4), and the water pump (4) and the cleaning bucket (27) are connected by a pipe and pass through the device housing (1).

6. A municipal sewage pretreatment device according to claim 5, characterized in that: The reverse osmosis cleaning mechanism further comprises a transverse block (29) fixedly connected to the bottom of both ends of the cleaning barrel (27), a hydraulic rod (23) is fixedly passed through the two transverse blocks (29), the telescopic ends of the two hydraulic rods (23) are fixedly connected to a connecting plate (24), and a blocking plate (25) is fixedly connected between the two connecting plates (24), and the blocking plate (25) is used to cover the discharge port (26).

7. A municipal sewage pretreatment device according to claim 6, characterized in that: A knocking vibration mechanism is provided between the cleaning bucket (27) and the connecting ring (30), the knocking vibration mechanism comprising elastic columns (31) fixedly connected to both sides of the top of the inner wall of the cleaning bucket (27), the bottom ends of the two elastic columns (31) are fixedly connected to knocking balls (32), and the ends of the two connecting rings (30) away from each other are fixedly connected to a plurality of evenly arranged triangular blocks (33).

8. The municipal sewage pretreatment device according to claim 1, characterized in that: A plurality of evenly arranged reinforcement rods (35) are fixedly connected to the outer sides of the corresponding filter elements (34) between the two connecting rings (30).

9. The municipal sewage pretreatment device according to claim 1, characterized in that: An L-shaped plate (6) is fixedly connected to one end of the device housing (1) above the rotating cylinder (15), and a fixed disk (10) is fixedly connected to the other end of the L-shaped plate (6). The fixed disk (10) and the rotating cylinder (15) are rotatably connected. A feed pipe (8) is fixedly passed through one end of the fixed disk (10) away from the device housing (1). A transverse plate (7) is fixedly connected to the top of the outer wall of the feed pipe (8). The transverse plate (7) and the L-shaped plate (6) are fixedly connected. A solenoid valve (9) is installed on the feed pipe (8).

10. The municipal sewage pretreatment device according to claim 1, characterized in that: The other end of the device housing (1) is fixedly connected to both sides of the rotating cylinder (18) with electric push rods (16), and the telescopic ends of the two electric push rods (16) are fixedly connected to fixed blocks (22). The two fixed blocks (22) are fixedly connected to the blocking disk (2). The other end of the device housing (1) is fixedly connected to the outer side of the rotating cylinder (18) with multiple evenly arranged connecting columns (17), and the other ends of the multiple connecting columns (17) are fixedly connected to a fixing ring (3). The fixing ring (3) is rotatably connected to the rotating cylinder (18). The end of the fixing ring (3) away from the device housing (1) is provided with a sealing groove (39), and the end of the blocking disk (2) close to the device housing (1) is fixedly connected to a sealing ring (38) whose shape matches the sealing groove (39).

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