Sewage treatment device

Abstract

The invention discloses a sewage treatment device, and belongs to the technical field of sewage treatment, the sewage treatment device comprises a filtering tank and a filtering cylinder arranged in the filtering tank, one end of the filtering tank is provided with a sewage discharging cylinder, and a cleaning device is arranged between the filtering cylinder and the sewage discharging cylinder; and a knocking assembly synchronously acting with the cleaning device is arranged between the filter cylinder and the sewage discharge cylinder. According to the scheme, the cleaning device and the knocking assembly are arranged at the position, close to the pollution discharge cylinder, of the filter cylinder, impurities and dirt at the bottom of the filter cylinder can be cleaned, and the impurities are prevented from blocking the bottom of the filter cylinder and affecting the pollution discharge effect of the pollution discharge cylinder in the backwashing process; the cleaning device and the knocking assembly can act simultaneously, and while the cleaning device cleans the bottom of the filter cartridge, the knocking assembly knocks the structure at the bottom of the filter cartridge, so that impurities attached to the bottom of the filter cartridge are shaken off, the bottom of the filter cartridge is backwashed and dredged, and the backwash effect and the pollution discharge capacity of the sewage treatment device are improved.

Description

Technical Field

[0001] The present invention relates to a sewage filtering device, and more particularly to a sewage treatment device. Background Art

[0002] With the improvement of urbanization level and the rapid expansion of population size, the requirements for urban sewage treatment are becoming higher and higher. One of the important indicators of urban sewage treatment is whether the COD value meets the standard. Sewage treatment is to treat sewage using physical, chemical and biological methods to purify sewage, reduce pollution, and achieve sewage recycling, reuse and full utilization of water resources.

[0003] The backwash filter device is a precision device that uses a filter to directly intercept impurities in the water, remove suspended solids and particulate matter in the water, reduce turbidity, purify water quality, reduce system dirt, algae, rust, etc., to purify water quality and protect the normal operation of other equipment in the system. When the reverse water flow is used to flush the filter layer to restore the normal operation of the filter tank, water flows through the backwash system through the filter tank to flush out the blocking substances in the filter material, restore the purification function of the filter, and remove the blockage of the filter.

[0004] However, during the rotary cleaning process, the impurities inside the filter cartridge are reversely flushed and discharged, and the sewage with impurities will be concentrated and discharged from the bottom of the filter cartridge. This will cause the impurities to easily become blocked at the bottom of the filter cartridge, and the sewage discharge capacity will be reduced. The existing brushing cleaning is only inside the filter cartridge, and the outside of the bottom cannot be brushed and the blocked impurities cannot be vibrated out.

[0005] For example: Chinese patent announcement number CN215876451U, announcement date February 22, 2022, the name of the utility model is a sewage treatment filter tank for urban domestic sewage, the application discloses a sewage treatment device, a filter cartridge is arranged in the middle of the protective tank body, the filter cartridge is connected to the protective tank body by a fixed ring body, a backwashing assembly is arranged inside the protective tank body along the outside of the filter cartridge, the backwashing assembly includes a backwashing ring tube, the inner wall of the backwashing ring tube is fixed with cleaning bristles, the cleaning bristles are in contact with the filter cartridge, the inner annular array of the backwashing ring tube has a backwashing nozzle, the backwashing nozzle is located in the cleaning bristles, the upper end of the backwashing ring tube is provided with a backwashing water inlet pipe, the backwashing water inlet pipe, the backwashing ring tube and the backwashing nozzle are connected. However, in this scheme, the backwashing work of the filter cannot remove impurities at the bottom of the filter tank, and it is easy to form a blockage at the bottom of the filter tank. Summary of the invention

[0006] The present invention overcomes the problem that during the backwashing process of existing sewage treatment equipment, impurities and dirt cannot be effectively discharged at the bottom of the filter cartridge and the backwashing effect is poor, and provides a sewage treatment device. This scheme can effectively clean the impurities at the bottom of the filter cartridge in the sewage treatment device, improve the backwashing effect, and improve the sewage discharge capacity.

[0007] In order to solve the above technical problems, the present invention adopts the following technical scheme: a sewage treatment device, comprising a filter tank and a filter cartridge arranged in the filter tank, a sewage discharge cartridge being arranged at one end of the filter tank, a cleaning device being arranged between the filter cartridge and the sewage discharge cartridge, and a knocking assembly which acts synchronously with the cleaning device being arranged between the filter cartridge and the sewage discharge cartridge. This scheme arranges a cleaning device and a knocking assembly at a position of the filter cartridge close to the sewage discharge cartridge, which can clean the impurities and dirt at the bottom of the filter cartridge, prevent the impurities from clogging the bottom position of the filter cartridge and affecting the sewage discharge effect of the sewage discharge cartridge during the backwashing process; the cleaning device and the knocking assembly can act at the same time, and while the cleaning device cleans the bottom of the filter cartridge, the knocking assembly will also knock on the structure at the bottom of the filter cartridge, thereby shaking off the impurities attached to the bottom of the filter cartridge, backwashing and draining through the bottom of the filter cartridge, and improving the backwashing effect and sewage discharge capacity of the sewage treatment device.

[0008] Preferably, the cleaning device comprises a rotating rod located on the axis of the filter cartridge, one end of the rotating rod extends between the filter cartridge and the sewage discharge cartridge, and the rotating rod is provided with a first cleaning plate facing the filter cartridge. The rotating rod can drive the first cleaning plate to rotate to perform rotary cleaning on the bottom of the filter cartridge.

[0009] Preferably, the knocking assembly includes a fixed cylinder and a knocking column slidably connected to the fixed cylinder, the position of the knocking column corresponds to the position of the first cleaning plate and faces the filter cylinder, and the knocking column is linked to the rotating rod through a driving rod and slides in the fixed cylinder. The knocking column can knock on the structure at the bottom of the filter cylinder, and the knocking column and the first cleaning device work together to clean the bottom of the filter cylinder; when the rotating rod rotates, it drives the first cleaning device to work, and also drives the driving rod to move, thereby driving the knocking column to reciprocate in the vertical direction to knock on the bottom of the filter cylinder, shake off debris, and improve the cleaning effect.

[0010] Preferably, a partition is provided between the filter cartridge and the sewage discharge cylinder, the knocking assembly is arranged on the partition, and a through hole is provided on the partition. The partition separates the filter cartridge and the sewage discharge cylinder, and can be used to arrange structures such as the knocking assembly. The through hole on the partition can connect the sewage discharge cylinder and the filter cartridge, and can be used for the entry and exit of sewage and impurities.

[0011] Preferably, the cleaning device further comprises a second cleaning plate disposed on the rotating rod and located inside the filter cartridge. The second cleaning plate is located at the inner axis position of the filter cartridge and can clean the inner wall of the filter cartridge.

[0012] Preferably, a driving wheel is provided on the rotating rod, a rack is provided on the knocking column, a driven wheel meshing with the driving wheel is provided at one end of the driving rod, and a half gear matched with the rack is provided at the other end of the driving rod. When the rotating rod rotates, the driving wheel follows the rotation, and then the driving wheel drives the driven wheel on the driving rod to rotate, that is, the driving rod is driven to rotate, and then the half gear on the driving rod follows the rotation, and the half gear can mesh with the rack on the knocking column, driving the knocking column to slide in the fixed cylinder. Since there are only half of the gear teeth on the half gear, the knocking column loses the meshing connection with the half gear at the position without gear teeth, and the knocking column falls back, thereby realizing the reciprocating motion of the knocking column in the vertical direction to knock the bottom of the filter cylinder.

[0013] Preferably, a sealing plate is provided at one end of the filter cartridge near the knocking assembly, a filter hole is provided in the middle of the sealing plate, the maximum outer diameter of the filter hole matches the outer diameter of the filter cartridge, and the maximum outer diameter of the sealing plate matches the outer diameter of the filter tank. The sealing plate can separate the structure on the bottom of the filter cartridge and the partition, and the filter cartridge on the sealing plate can pass sewage and preliminarily filter the sewage; and the maximum outer diameter of the filter hole matches the radial size of the filter cartridge, so that the sewage passing through the filter hole can only enter the inside of the filter cartridge, and then be filtered through the side wall of the filter cartridge to enter the position between the filter cartridge and the filter tank. If the maximum outer diameter of the sealing plate matches the outer diameter of the filter tank, the end position between the filter cartridge and the filter tank can be sealed to prevent the loss of filtered water.

[0014] Preferably, a driving device is provided at one end of the filter cartridge away from the knocking assembly, and an output end of the driving device is connected to the rotating rod. The driving device is used to drive the rotating rod to move and provide power for the cleaning device and the knocking assembly.

[0015] Preferably, the filter tank is provided with a water outlet, and the sewage barrel is provided with a water inlet. The water outlet on the filter tank is used to discharge and collect filtered water; while the water outlet on the sewage barrel is used to allow sewage to enter the filter barrel for sewage treatment.

[0016] Preferably, the water inlet is provided with a first pressure detection device, the water outlet is provided with a second pressure detection device, and a pressure difference device is provided between the first pressure detection device and the second pressure detection device. The first pressure detection device can measure the water pressure at the water inlet, the second pressure detection device can detect the water pressure at the water outlet, and the pressure difference device can detect the pressure difference between the water inlet and the water outlet. In this way, when the pressure difference is large, it means that the filter cartridge is seriously blocked and backwashing operation is required to discharge sewage; when the pressure difference is small, it means that there are few debris inside the filter cartridge and there is no serious blockage, and the sewage treatment operation can continue.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) effectively cleaning impurities at the bottom of the filter cartridge in the sewage treatment device, improving the backwashing effect, and improving the sewage discharge capacity; (2) during the backwashing process, the bottom of the filter cartridge can be cleaned to prevent clogging of the bottom of the filter cartridge; (3) in combination with the cleaning plate and the knocking column, the cleaning effect of the bottom of the filter cartridge can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an axonometric drawing of the present invention.

[0019] Figure 2 This is an axonometric view from another perspective of the present invention.

[0020] Figure 3 It is a schematic diagram of the filter cartridge and other components inside the filter tank of the present invention.

[0021] Figure 4 It is a schematic diagram of the filter cartridge of the present invention.

[0022] Figure 5 It is a schematic diagram of the layout of the cleaning device of the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the partition and the knocking assembly of the present invention.

[0024] Figure 7 It is a schematic diagram of the structure of the knocking component of the present invention.

[0025] Figure 8 It is a schematic diagram of the cooperation between the fixing tube and the knocking column of the present invention.

[0026] Fig. 9 It is a schematic diagram of the knocking column structure of the present invention.

[0027] Fig.10 It is a schematic diagram of the guide seat structure in the fixed cylinder of the present invention.

[0028] In the figure: 10, filter tank; 11, sewage cylinder; 12, sealing cover; 13, reducer; 14, driving motor; 15, rotating rod; 16, supporting foot; 17, sewage pipe; 20, filter cylinder; 21, sealing plate; 22, partition; 23, first cleaning plate; 24, second cleaning plate; 25, connecting rod; 26, second cleaning brush; 27, third cleaning brush; 28, first cleaning brush; 29, filter hole; 30, knocking column; 31, guide groove; 3 2. Fixed cylinder; 33. Guide seat; 34. Limit block; 35. Elastic member; 36. Conical portion; 37. Drain hole; 38. Through hole; 40. Drive rod; 41. Driving wheel; 42. Driven wheel; 43. Half gear; 44. Rack; 45. Engaging hole; 46. Fixed plate; 50. Water inlet; 51. Water pipe; 52. Water outlet; 53. First pressure detection device; 54. Second pressure detection device; 55. Pressure difference device; 90. Bearing. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0030] Example 1: Figures 1 to 10 A sewage treatment device shown includes a filter tank 10 and a sewage discharge barrel 11. The filter tank 10 is arranged above the sewage discharge barrel 11. The filter tank 10 is a hollow cylindrical structure as a whole, and the sewage discharge barrel 11 is a conical structure with a large upper part and a small lower part. The sewage discharge barrel 11 and the filter tank 10 can be connected by a flange. A sealing cover 12 is arranged above the filter tank 10. The sealing cover 12 is arranged at a position away from the sewage discharge barrel 11. The sealing cover 12 is also connected to the top of the filter barrel 11 by a flange and a bolt.

[0031] A filter cartridge 20 is arranged inside the filter tank 10. The filter cartridge 20 is a hollow cylindrical structure as a whole. The filter cartridge 20 is coaxially arranged with the filter tank 10, and a certain distance is maintained between the inner wall of the filter tank 10 and the outer wall of the filter cartridge 20. A driving device is arranged on the upper surface of the sealing cover 12. The driving device is arranged at the end of the filter cartridge 20 away from the sewage cylinder 11 and is located outside the filter tank 10. The driving device includes a driving motor 14 and a reducer 13. The driving motor 14 drives the reducer 13 to work, and the reducer 13 can The output torque is provided, and the reducer 13 is arranged in the middle of the sealing cover 12, and is fixedly connected to the upper end surface of the sealing cover 12 through bolts and other structures. A rotating rod 15 is fixedly connected to the output end of the reducer 13, and the rotating rod 15 is located on the axis of the filter cartridge 20 or the filter tank 10; the rotating rod 15 extends from the middle of the filter cartridge 20 at the location of the sealing cover 12 to the bottom of the filter cartridge 20, and a cleaning device is provided on the rotating rod 15, and a knocking assembly is provided near the bottom of the rotating rod 15. By starting the driving device, the driving motor 14 drives the reducer 13 to work, and the output torque of the reducer 13 drives the rotating rod 15 to rotate, so that the cleaning device can clean the filter cartridge 20, and the knocking assembly can knock on the bottom of the filter cartridge 20 at the same time, and the cleaning and knocking actions are carried out synchronously, which can greatly improve the sewage discharge capacity of the filter cartridge 20 during the backwashing process, improve the backwashing effect, and avoid the clogging of the filter tank 10.

[0032] Specifically, Figure 3 , Figure 6 and Figure 7 As shown, the cleaning device includes a first cleaning plate 23, which is fixedly connected to the bottom position of the rotating rod 15, that is, the first cleaning plate 23 is located at the bottom position of the filter cartridge 20, and the first cleaning plate 23 is a long strip plate-like structure, and a fixing hole is provided in the middle position of the first cleaning plate 23, and the first cleaning plate 23 is detachably fixedly connected to the rotating rod 15 through the fixing hole. The two sides of the first cleaning plate 23 are symmetrically distributed about the rotating rod 15. A first cleaning brush 28 is provided on the first cleaning plate 23, and the first cleaning brush 28 is arranged on the first cleaning plate 23 toward the bottom side of the filter cartridge 20, and the radial dimension of the first cleaning plate 23 is slightly smaller than the radial dimension of the bottom of the filter cartridge 20, so that the structure at the bottom of the filter cartridge 20 can be cleaned, and the cleaning area of ​​the bottom of the filter cartridge 20 can be increased as much as possible.

[0033] A partition 22 is also provided between the filter cartridge 20 and the sewage discharge barrel 11. The partition 22 and the bottom of the filter tank 10 are an integral structure and can be integrally connected by welding; the partition 22 separates the bottom of the filter tank 10 from the top of the sewage discharge barrel 11, and a plurality of through holes 38 are provided in the middle position of the partition 22, and the space inside the filter tank 10 is connected with the interior of the sewage discharge barrel 11 through the through holes 38; and the size of the outer edge of the partition 22 is larger than the outer diameter of the filter tank 10, and the partition 22 is a disc-shaped structure, so that the outer edge of the partition 22 forms a flange structure outside the filter tank 10, and a plurality of annular evenly distributed flange holes are provided at the outer edge position of the partition 22. Similarly, a corresponding flange is also provided at the top of the sewage discharge barrel 11, and the filter tank 10 and the sewage discharge barrel 11 can be connected together by bolts. In addition, a bearing mounting hole is provided at the central position of the partition 22, and a bearing 90 is arranged on the bottom end of the rotating rod 15 in the bearing mounting hole. The upper end of the rotating rod 15 is connected to the reducer 13, and the bottom is rotatably connected to the partition 22 to ensure the movement stability of the rotating rod 15.

[0034] The filter cartridge 20 is located inside the filter tank 10, and the top of the filter cartridge 20 is flush with the top of the filter tank 10, and the bottom of the filter cartridge 20 is kept at a certain distance from the bottom of the filter tank 10, that is, the bottom of the filter cartridge 20 is kept at a certain distance from the partition plate 22. A sealing plate 21 is provided at the bottom end of the filter cartridge 20, and the sealing plate 21 can block the bottom of the filter cartridge 20, but a filter hole 29 is provided on the sealing plate 21, such as Figure 3 As shown, the filter holes 29 are distributed in an annular shape in the middle position of the sealing plate 21, and the filter holes 29 are in a circular structure. The maximum radial dimension of the annular filter holes 29 is adapted to the inner diameter dimension of the bottom of the filter cartridge 20, so that the filter holes 29 can connect the interior of the filter cartridge 20 with the cavity between the sealing plate 21 and the partition plate 22, and the radial dimension of the outer edge of the sealing plate 21 is larger than the outer diameter dimension of the filter cartridge 20, and is adapted to the outer diameter dimension of the filter tank 10, so that the outer edge portion of the sealing plate 21 can seal the radial cavity position between the filter cartridge 20 and the filter tank 10 and the axial cavity position between the sealing plate 21 and the partition plate 22, thereby preventing the sewage between the sealing plate 21 and the partition plate 22 from directly entering the cavity between the filter cartridge 20 and the filter tank 10.

[0035] It should be noted that the radial size of the first cleaning plate 23 can be adapted to the annular size of the annularly distributed filter holes 29, so that the first cleaning brush 28 on the first cleaning plate 23 can clean the filter holes 29 on the sealing plate 21 and specifically clean the impurities and dirt remaining in the filter holes 29.

[0036] The knocking assembly is disposed in the axial cavity between the sealing plate 21 and the partition plate 22, and is located at the bottom of the filter cartridge 20; specifically, Figures 7 to 10 As shown, the knocking assembly is arranged on the partition 22, and the knocking assembly includes a fixed cylinder 32 and a knocking column 30. The fixed cylinder 32 is a hollow cylindrical structure, and the knocking column 30 is a cylindrical structure. The top of the knocking column 30 is a conical portion 36, which can play a good role at the bottom of the filter cylinder 20; the knocking column 30 is slidably connected to the inside of the fixed cylinder 32, and the fixed cylinder 32 is fixedly connected to the upper surface of the partition 22. A driving wheel 41 is provided at the bottom end of the rotating rod 15, and the driving wheel 41 is a bevel gear structure; on the partition 22 and between the fixed cylinder 32 and the rotating rod 15, a driving wheel 41 is provided. A fixed plate 46 is provided between the rods 15, and a driving rod 40 is rotatably connected to the fixed plate 46; the driving rod 40 is arranged perpendicular to the rotating rod 15, and a driven wheel 42 is provided at the end of the driving rod 40 close to the rotating rod 15, and the driven wheel 42 is also a bevel gear structure, and the driven wheel 42 is meshed with the driving wheel 41 for transmission; a half gear 43 is provided at the end of the driving rod 40 away from the rotating rod 15, and only half of the circle of the half gear 43 is arranged with gear teeth. The half gear 43 can be linked with the knocking column 30 inside the fixed cylinder 32, and drive the knocking column 30 to slide up and down in the fixed cylinder 32.

[0037] Specifically, a meshing hole 45 is provided on the fixed cylinder 32, and a rack 44 is provided on the axial surface of the knocking column 30. The position of the rack 44 corresponds to the position of the meshing hole 45, so that the rack 44 can be exposed in the meshing hole 45, and the half gear 43 on the driving rod 40 is located at the meshing hole 45 and meshes with the rack 44 on the knocking column 30. When the driving motor 14 is started, the reducer 13 drives the rotating rod 15 to rotate, and then drives the driving wheel 41 at the bottom of the rotating rod 15 to rotate. The driving wheel 41 transmits motion to the driven wheel 42, drives the driving rod 40 to rotate, and then drives the half gear 43 to rotate. The half gear 43 meshes with the rack 44 on the knocking column 30, drives the knocking column 30 to move upward, and the knocking column 30 knocks the sealing plate 21 structure at the bottom of the filter cylinder 20, shakes off the impurities and dirt attached to the filter hole 29 on the sealing plate 21, and cooperates with the first cleaning plate 23 to effectively clean the structure at the bottom of the filter cylinder 20. Since the gear teeth on the half gear 43 are only provided with half a circle, when the part without gear teeth rotates to be opposite to the knocking column 30, the rack 44 on the knocking column 30 is no longer meshed with the half gear 43, and the knocking column 30 falls back to the bottom of the fixed cylinder 32 under the action of its own gravity, thereby realizing the reciprocating knocking of the knocking column 30 on the bottom of the filter cylinder 20. It should be noted that the knocking column 30 and the fixed cylinder 32 are both provided with two groups, and are symmetrically distributed on both sides of the rotating rod 15, so that the knocking effect of the knocking assembly on the bottom of the filter cylinder 20 will be more uniform; of course, the number of the knocking column 30 and the fixed cylinder 32 can be designed according to actual needs, and is not limited to the two groups in this embodiment.

[0038] It should also be noted that in order to ensure that the knocking column 30 does not rotate circumferentially in the fixed cylinder 32, a guide seat 33 is also provided in the fixed cylinder 32. The guide seat 33 is a long strip structure arranged axially along the inner wall of the fixed cylinder 32. There are two groups of guide seats 33, which are symmetrically fixed on the inner wall of the fixed cylinder 32. A guide groove 31 is provided on the guide seat 33. The guide groove 31 is also parallel to the axial direction of the fixed cylinder 32. A limit block 34 is also provided on the outer surface of the knocking column 30. The limit block 34 is fixed on the knocking column 30. At the same time, there are two limit blocks 34, which are symmetrically arranged on both sides of the knocking column 30. The size of the limit block 34 is adapted to the guide groove 31. When the knocking column 30 is located inside the fixed cylinder 32, the limit block 34 is located in the guide groove 31. Therefore, when the knocking column 30 moves up and down, the knocking column 30 will not move circumferentially, ensuring that the rack 44 can always be aligned with the position of the half gear 43.

[0039] In addition, an elastic member 35 is provided in the fixed tube 32 and at the bottom of the knocking column 30, one end of the elastic member 35 is fixed to the bottom of the fixed tube 32, and the other end of the elastic member 35 is fixedly connected to the bottom of the knocking column 30. When the knocking column 30 rises to a high position, the elastic member 35 generates a downward pulling force on the knocking column 30, so that the knocking column 30 can be reset in time, avoiding impurities and dirt from generating resistance to the knocking column 30 and preventing it from being reset, thereby ensuring the knocking effect. Specifically, the elastic member 35 can adopt a telescopic spring structure; it should also be noted that a drainage hole 37 is also provided at the bottom of the fixed tube 32, and there are multiple drainage holes 37, which are arranged on the circumferential surface of the bottom of the fixed tube 32. The drainage holes 37 connect the inside of the fixed tube 32 and the outside of the fixed tube 32. The drainage holes 37 can discharge the accumulated water in the fixed tube 32 in time, avoiding the accumulated water in the fixed tube 32 affecting the movement of the knocking column 30.

[0040] It should also be noted that the installation position of the fixed cylinder 32 on the partition 22 is located outside the maximum dimension of the first cleaning plate 23, that is, the distance between the two groups of fixed cylinders 32 is greater than the length (maximum radial) dimension of the first cleaning plate 23, thereby avoiding interference in the movement between the knocking column 30 and the first cleaning plate 23; in this way, when the driving device is started, the first cleaning plate 23 and the knocking assembly can work at the same time.

[0041] like Figure 4 and Figure 5As shown, the cleaning device also includes a second cleaning plate 24, which is located inside the filter cartridge 20; specifically, a second cleaning plate 24 is provided on the rotating rod 15 corresponding to the internal position of the filter cartridge 20, and three groups of second cleaning plates 24 are provided, and are evenly and fixedly arranged in the circumference of the rotating rod 15, and the axial length of the second cleaning plate 24 is generally equivalent to the axial length of the filter cartridge 20. Each second cleaning plate 24 is fixed to the rotating rod 15 by two connecting rods 25. Specifically, a connecting rod 25 is provided at the upper end of the second cleaning plate 24, one end of the connecting rod 25 is fixedly connected to the upper end of the second cleaning plate 24, and the other end of the connecting rod 25 is fixedly connected to the rotating rod 15. Similarly, the lower end of the second cleaning plate 24 has the same arrangement, one end of the connecting rod 25 is fixedly connected to the lower end of the second cleaning plate 24, and the other end of the connecting rod 25 is fixedly connected to the rotating rod 15, so that the second cleaning plate 24 is fixed; a second cleaning brush 26 is provided on the side of the second cleaning plate 24 close to the inner wall of the filter cartridge 20, and the second cleaning brush 26 can directly contact the inner wall of the filter cartridge 20; in this way, when the rotating rod 15 rotates, the second cleaning brush 26 can directly produce a brushing effect on the inner wall of the filter cartridge 20.

[0042] A filter net is provided on the inner wall of the filter cylinder 20, which can perform a second filtration on the sewage entering the filter cylinder 20; in order to ensure the filtering effect of the inner wall of the filter cylinder 20, the second cleaning plate 24 is arranged evenly in the circumferential direction, and the width of the second cleaning plate 24 is also smaller than that of the first cleaning plate 23.

[0043] A third cleaning brush 27 is also provided on the connecting rod 25 at the lower end of the second cleaning plate 24. The third cleaning brush 27 is located on the connecting rod 25 facing the sealing plate 21 and can directly contact the sealing plate 21. In this way, when the rotating rod 15 rotates, the third cleaning brush 27 can brush the upper surface of the sealing plate 21 (that is, the bottom end located inside the filter cartridge 20); the third cleaning brush 27 is arranged along the radial direction of the filter cartridge 20 (or the radial direction of the sealing plate 21); and the second cleaning plate 24 is located inside the filter cartridge 20, and the inner surface of the filter cartridge 20 The diameter size position includes the position of the filter hole 29 on the sealing plate 21, so that the third cleaning brush 27 can clean the filter hole 29 on the side of the sealing plate 21 close to the inside of the filter cartridge 20, and the first cleaning brush 28 can clean the filter hole 29 on the side of the sealing plate 21 away from the inside of the filter cartridge 20, that is, both sides of the filter hole 29 are cleaned by the first cleaning brush 28 and the third cleaning brush 27. During the backwashing operation, the cleaning effect of the bottom structure of the filter cartridge 20 is greatly improved, avoiding blockage at the bottom of the filter cartridge 20 and in the sewage cartridge 11.

[0044] In addition, it should be noted that a water inlet 50 is provided on the side of the sewage discharge barrel 11 for introducing sewage, and a sewage discharge pipe 17 is provided at the bottom of the sewage discharge barrel 11, and the sewage discharge pipe 17 can discharge debris and dirt during sewage treatment and backwashing operations. Support legs 16 are also provided on the outside of the sewage discharge barrel 11 for supporting the entire sewage discharge barrel and filter tank and other devices. A water outlet 52 is also provided on the filter tank for discharging and collecting filtered water.

[0045] In addition, a first pressure detection device 53 is provided at the water inlet 50 of the sewage tube 11, and the first pressure detection device 53 can detect the water pressure at the water inlet 50 of the sewage tube 11, and a second pressure detection device 54 is provided at the water outlet 52 of the filter tank 10, and the second pressure detection device 54 can detect the water pressure at the water outlet 52 of the filter tank 10. At the same time, a pressure difference device 55 is also arranged on the filter tank 10, and the pressure difference device 55 can detect the water pressure difference between the water inlet 50 of the sewage tube 11 and the water outlet 52 of the filter tank 10. The first pressure detection device 53 and the second pressure detection device 54 are both water pressure gauges, and the pressure difference device 55 is a pressure difference gauge; a water pipe 51 is provided between the first pressure detection device 53 and the pressure difference device 55, and a water pipe 51 is also provided between the second pressure detection device 54 and the pressure difference device 55, so that the pressure difference device 55 can directly obtain the pressure difference between the water inlet 50 and the water outlet 52. The water pipe 51 is made of copper.

[0046] When the sewage treatment device is in good condition, that is, there is no blockage inside the filter cartridge 20, the water pressure at the water inlet 50 and the water outlet 52 are similar, and the pressure difference is small, which indicates that backwashing operation is not required. When the pressure difference device 55 detects that the pressure difference between the water inlet 50 and the water outlet 52 is large, it means that the filter cartridge 20 inside the filter tank 10 has been severely blocked, and the pressure difference at the water outlet 52 is often much smaller than the pressure difference at the water inlet 50. At this time, the sewage treatment device needs to be backwashed.

[0047] When sewage treatment is required, the sewage pipe 17 at the bottom of the sewage barrel 11 is in a closed state, and sewage is injected from the water inlet 40 of the sewage barrel 11. The sewage enters the axial cavity between the partition 22 and the sealing plate 21 through the through hole 38 on the partition 22, and then passes through the filter hole 29 on the sealing plate 21 for the first filtration, enters the interior of the filter barrel 20 upward, and then passes through the side wall of the filter barrel 20 for the second filtration and enters the radial cavity between the filter barrel 20 and the filter tank 10. Finally, the filtered water is discharged and collected from the water outlet 52 on the filter tank 20.

[0048] When backwashing is required, the drain pipe 17 at the bottom of the drain cylinder 11 is in an open state, and flushing water is injected from the water outlet 52 of the filter tank 10. The flushing water enters the radial cavity between the filter tank 10 and the filter cylinder 20, and then enters the inside of the filter cylinder 20 from the outside of the filter cylinder 20. At the same time, the drive motor 14 is started, driving the second cleaning plate 24 on the rotating rod 15 to clean the inner wall of the filter cylinder 20 and the bottom of the filter cylinder 20 under the action of the flushing water. After the flushing water enters the inside of the filter cylinder 20, it flows to the sealing plate at the bottom. 21 is located, and then the filter hole 29 is flushed through the filter hole 29 on the sealing plate 21. At this time, the first cleaning plate 23 at the bottom of the filter cartridge 20 and the knocking assembly also move together under the action of the rotating rod 15. Under the action of the flushing water, the filter hole 29 on the sealing plate 21 at the bottom of the filter cartridge 20 is flushed and knocked; then the flushing liquid enters the sewage barrel 11 through the through hole 38 on the partition 22, and finally the flushing liquid is discharged through the sewage pipe 17 at the bottom of the sewage barrel 11, and the impurities and dirt brought out by the backwashing are discharged together.

Claims

1. A sewage treatment device, characterized in that: It comprises a filter tank and a filter cartridge arranged in the filter tank, a sewage discharge cartridge is arranged at one end of the filter tank, a cleaning device is arranged between the filter cartridge and the sewage discharge cartridge, and a knocking component which acts synchronously with the cleaning device is arranged between the filter cartridge and the sewage discharge cartridge.

2. A sewage treatment device according to claim 1, characterized in that: The cleaning device comprises a rotating rod located at the axis of the filter cartridge, one end of the rotating rod extends between the filter cartridge and the sewage discharge cartridge, and a first cleaning plate facing the filter cartridge is provided on the rotating rod.

3. A sewage treatment device according to claim 2, characterized in that: The knocking assembly includes a fixed cylinder and a knocking column slidably connected to the fixed cylinder. The position of the knocking column corresponds to the position of the first cleaning plate and faces the filter cylinder. The knocking column is linked to the rotating rod through a driving rod and slides in the fixed cylinder.

4. A sewage treatment device according to claim 1, characterized in that: A partition is provided between the filter cartridge tank and the sewage discharge cartridge, the knocking assembly is arranged on the partition, and a through hole is provided on the partition.

5. A sewage treatment device according to claim 2 or 3, characterized in that: The cleaning device also includes a second cleaning plate which is arranged on the rotating rod and located in the filter cartridge.

6. A sewage treatment device according to claim 3, characterized in that: The rotating rod is provided with a driving wheel, the knocking column is provided with a rack, one end of the driving rod is provided with a driven wheel meshing with the driving wheel, and the other end of the driving rod is provided with a half gear adapted to the rack.

7. A sewage treatment device according to claim 2, characterized in that: The filter cartridge is provided with a sealing plate at one end close to the knocking assembly, a filter hole is provided in the middle of the sealing plate, the maximum outer diameter of the filter hole is matched with the radial dimension of the filter cartridge, and the maximum outer diameter of the sealing plate is matched with the outer diameter of the filter tank.

8. A sewage treatment device according to claim 7, characterized in that: A driving device is provided at one end of the filter cartridge away from the knocking assembly, and an output end of the driving device is connected to the rotating rod.

9. A sewage treatment device according to any one of claims 1 to 4 or 6 to 8, characterized in that: The filter tank is provided with a water outlet, and the sewage cylinder is provided with a water inlet.

10. A sewage treatment device according to claim 9, characterized in that: The water inlet is provided with a first pressure detection device, the water outlet is provided with a second pressure detection device, and a pressure difference device is provided between the first pressure detection device and the second pressure detection device.

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