Sewage pretreatment system

Abstract

The invention relates to a sewage pretreatment system which comprises a filter tank and a sedimentation tank which are horizontally arranged in sequence along a water flow direction, a grating plate is detachably arranged in the filter tank, a first baffle plate and a second baffle plate are respectively arranged on two opposite sides in the filter tank, a first baffle block and a second baffle block are respectively arranged on two opposite sides of the grating plate, and the first baffle plate, the first baffle block, the second baffle plate and the second baffle block jointly divide the filter tank into a first chamber and a second chamber; a plurality of partition plates which are arranged in parallel at intervals are arranged in the sedimentation tank, the partition plates are rotatably mounted in the sedimentation tank through rotating shafts, and the plurality of rotating shafts are driven by a driving assembly to synchronously rotate; when the plurality of partition plates rotate to a horizontal state, the sedimentation tank is divided into a sludge chamber and a clear water chamber. The interior of the filter tank is divided into the first chamber and the second chamber, so that large impurities can be conveniently and intensively collected and cleaned; a clear water chamber and a sludge chamber are separated in the sedimentation tank, and clear water and sludge can be effectively isolated.

Description

Technical Field

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

[0002] Before or in the early stage of sewage entering the sewage treatment plant, it will first go through a pretreatment stage to remove large floating objects, suspended matter and some grease to reduce the load of subsequent treatment units and protect the equipment from damage. At present, sewage pretreatment is mostly done by setting up grilles to intercept and remove larger floating objects and suspended matter in sewage, such as wood blocks, paper scraps, plastics, etc., and then using sedimentation tanks to remove small suspended particles such as mud, sand and silt in sewage. However, in the actual treatment process, it was found that the clean water in the upper layer of the sedimentation tank needs to be pumped out to flow into the next process. During the pumping process, due to the action of the water flow, part of the sludge in the lower layer will roll over and flow out together, resulting in poor treatment effect and inconvenient sludge cleaning. Summary of the invention

[0003] In view of this, the present invention provides a sewage pretreatment tank which can effectively reduce the re-flow of sludge after sedimentation in sewage and facilitate the cleaning of impurities such as wood blocks and sludge.

[0004] The purpose of the present invention is achieved through the following technical solutions: A sewage pretreatment system comprises: a filter tank and a sedimentation tank horizontally arranged in sequence along a water flow direction, the filter tank and the sedimentation tank are connected through a water delivery pipe; the filter tank is connected to a water inlet pipe, a grating plate is detachably provided in the filter tank, the grating plate is tilted, a first baffle and a second baffle are respectively provided on opposite sides of the filter tank, the grating plate is located between the first baffle and the second baffle, and a first block and a second block are respectively provided on opposite sides of the grating plate, the first baffle, the first block, the second baffle and the second block jointly divide the filter tank into a first chamber and a second chamber; a plurality of partitions arranged in parallel and spaced apart are provided in the sedimentation tank, the partitions are rotatably installed in the sedimentation tank through a rotating shaft, and the plurality of rotating shafts are driven to rotate synchronously by a driving assembly; when the plurality of partitions are rotated to a horizontal state, two adjacent partitions are connected end to end, and the sedimentation tank is divided into a sludge chamber and a clean water chamber, and the sedimentation tank is also provided with a desilting pipe and a water outlet pipe respectively connected to the sludge chamber and the clean water chamber.

[0005] In the above technical solution, the preliminary removal of suspended matter in sewage and the natural sedimentation of particulate matter are achieved by sequentially arranging the filter tank and the sedimentation tank along the water flow direction, thereby effectively improving the pretreatment efficiency. Among them, the grid plate in the filter tank can intercept large particles of impurities and protect the subsequent treatment equipment from being blocked, and the filter tank is divided into a first chamber and a second chamber. Sewage flows in the first chamber and intercepts large particles of impurities on one side of the grid plate. When the impurities need to be cleaned, the first block and the second block on the grid plate are separated from the first baffle and the second baffle respectively by moving the grid plate, so that the opening between the first baffle and the second baffle can be opened, so that the impurities can fall into the second chamber for convenient centralized cleaning.

[0006] In addition, the sedimentation tank uses gravity to settle fine particles, ensuring the initial purification of the effluent water quality. The rotatable design of multiple baffles in the sedimentation tank allows it to be divided into two different chambers, namely the sludge chamber and the clean water chamber, so that when clean water needs to be pumped out, the sludge can be isolated in the lower sludge chamber, effectively preventing the mixing of sludge and clean water and improving the effluent quality.

[0007] The present invention can intercept and precipitate larger and smaller floating objects and suspended objects in sewage through the functions of the filtering tank and the sedimentation tank, and the filtering tank is separated by a first chamber and a second chamber, which can facilitate the centralized collection and cleaning of larger impurities; the sedimentation tank is separated by a clean water chamber and a sludge chamber, and after the sedimentation of small suspended particles such as mud, sand, and sludge in the sewage, the sludge and the like are sealed in the sludge chamber through the function of multiple partitions, thereby effectively isolating the clean water and the sludge, so that when the clean water is pumped out, the sludge will not flow out with the water flow due to rolling, thereby improving the quality of the effluent water.

[0008] Optionally, in a possible implementation, a slide groove is provided on the inner side wall of the sedimentation tank, and the grid plate is movably clamped in the slide groove.

[0009] In the above technical solution, the inclined grid plate is combined with the chute design, making it easier to take out and put back the grid plate. The staff can easily slide the grid plate out along the chute for cleaning or replacement without entering the sedimentation tank. At the same time, the inclined grid plate can reduce the amount of impurities left on the grid plate to a certain extent, so that the impurities can fall to the bottom of the first chamber, which is convenient for quick transfer to the second chamber later.

[0010] Optionally, in a possible implementation, the first baffle plate and the first stop block may abut against each other, and the abutting surfaces of the first baffle plate and the first stop block are inclined surfaces, and the upper surfaces of the first baffle plate and the first stop block are both inclined relative to the horizontal plane and converge at the abutting surfaces of the first baffle plate and the first stop block.

[0011] In the above technical solution, the contact surface of the first baffle plate and the second baffle block is an inclined surface, which can play a positioning role on the one hand, that is, when the grille plate moves in the slide slot, it can be judged whether it has moved into place through the contact surface of the first baffle plate and the second baffle block, and on the other hand, it can play a supporting role for the grille plate. Since the contact surface is an inclined surface, the first baffle plate can effectively support the first baffle block, thereby ensuring its stability. In addition, the upper surface of the first baffle plate and the upper surface of the first baffle block are both inclined compared to the horizontal plane, so that impurities falling on the surfaces of the two can slide toward the intersection, that is, when cleaning impurities, the grille plate is pulled up to open the opening between the first baffle plate and the second baffle plate, and the impurities falling on the upper surface of the first baffle plate and the upper surface of the first baffle block will slide into the second chamber under the action of gravity.

[0012] Optionally, in a possible implementation manner, the second baffle plate and the second stop block may abut against each other, and the abutting surfaces of the second baffle plate and the second stop block are inclined surfaces.

[0013] In the above technical solution, the connection method of the second baffle plate and the second block is the same as that of the first baffle plate and the second block, that is, they can play a role of positioning and supporting to ensure the stability of the grid plate in the filter tank.

[0014] Optionally, in a possible implementation, the drive assembly is disposed outside the sedimentation tank, one end of the rotating shaft is rotatably clamped on the inner wall of the sedimentation tank, and the other end extends to the outside of the sedimentation tank, and the end of the rotating shaft extending to the outside of the sedimentation tank is connected to the drive assembly.

[0015] In the above technical solution, the drive assembly is installed outside the sedimentation tank, and only the end of the drive shaft located outside the sedimentation tank needs to be driven to rotate, which not only avoids direct contact between the drive components and water, reducing the risk of corrosion and wear, but also provides technicians with a more spacious and safe operating space. When maintenance or replacement of the drive assembly is required, there is no need to enter the sedimentation tank, reducing the difficulty of operation and safety risks.

[0016] Optionally, in a possible implementation, the drive assembly includes a motor, a main gear connected to the output shaft of the motor, a slave gear connected to the rotating shaft, and a toothed belt, wherein the toothed belt is used to connect the main gear and the slave gear on each of the rotating shafts.

[0017] In the above technical solution, a toothed belt is used as the transmission medium, which has the characteristics of high transmission efficiency and low friction loss. The toothed belt is tightly meshed with the master gear and the slave gear, which can ensure the smooth transmission of power. In addition, by transmitting the power of the motor to the slave gear on each shaft through the toothed belt, it can ensure that all the partitions rotate synchronously, avoiding vibration and noise caused by asynchronism.

[0018] Optionally, in a possible implementation, the rotating shaft is close to the lower end of the partition, and the lower end of the partition is an end close to the bottom of the sedimentation tank in a vertical state.

[0019] In the above technical solution, the rotating shaft is designed at the lower end of the partition, so that the partition can reduce the stirring of the sludge when it is flipped, and can effectively prevent the partition from scraping up the sludge and entering the clean water chamber when it is flipped, thereby ensuring that the partition can seal most of the sludge in the sludge chamber to further improve the water quality.

[0020] Optionally, in a possible implementation, a first inclined plane is provided at the upper end of the partition, and a second inclined plane parallel to the first inclined plane is provided at the lower end of the partition. When the partition is in a horizontal state, the first inclined plane and the second inclined plane on two adjacent partitions can fit together.

[0021] In the above technical solution, the first inclined plane and the second inclined plane in two adjacent horizontal partitions fit together to form a tight sealing surface, which effectively prevents water from flowing in the gap between the partitions and ensures that clean water and sludge can be separated according to a predetermined path. In addition, the design of the first inclined plane can prevent sludge from accumulating on the upper end of the partition, and the design of the second inclined plane can make the partition form a complete fit with the adjacent partition when it is horizontal. Multiple partitions can all maintain a horizontal state and form mutual support and positioning at the same time. The first inclined plane rotates into place after contacting the second inclined plane, which not only improves the stability of its structure, but also improves the accuracy of its positioning.

[0022] Optionally, in a possible implementation manner, a curved surface is further provided at the lower end of the partition, and the curved surface is connected to the second inclined plane.

[0023] In the above technical solution, since the lower end of the partition may come into contact with silt when there is a lot of silt accumulation, the design of the curved surface can to a certain extent prevent the partition from adhering to silt when it is turned over, that is, the silt will not adhere to the lower end of the partition, which can further reduce the silt from entering the clean water chamber. In addition, the design of the curved surface also helps to disperse the pressure and stress on the partition and improve the structural strength of the partition.

[0024] Optionally, in a possible implementation, a limit block is provided on the inner side wall of the sedimentation tank, and a third inclined plane is provided on the limit block, and the third inclined plane can be aligned with the first inclined plane on the partition located at the head end.

[0025] In the above technical solution, the limit block and the third inclined plane thereon can not only provide physical support for the partition, reduce the load on the drive assembly, but also enhance the stability of the partition in the sedimentation tank by the inclined surface fitting method. It effectively prevents the displacement or shaking of the partition caused by water flow impact or long-term operation, and ensures the overall structural safety and stable operation of the sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a top view of the overall structure of an embodiment.

[0028] Figure 2 for Figure 1 Cross-sectional view along the AA direction.

[0029] Figure 3 for Figure 2 Enlarged view of part B in the middle.

[0030] Figure 4 It is a schematic diagram of an embodiment after the partition is rotated to a horizontal state.

[0031] Figure numerals: 1-filter tank; 11-water inlet pipe; 12-first baffle; 13-second baffle; 14-chute; 15-first chamber; 16-second chamber; 2-sedimentation tank; 21-water outlet pipe; 22-dredging pipe; 23-limiting block; 231-third inclined plane; 3-water pipe; 4-grating plate; 41-first block; 411-first waterproof rubber layer; 42-second block; 421-second waterproof rubber layer; 5-partition; 51-first inclined plane; 52-second inclined plane; 53-arc surface; 6-rotating shaft; 7-driving assembly; 71-motor; 72-main gear; 73-slave gear; 74-toothed belt. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0034] Please refer to Figure 1-Figure 4 .

[0035] The present embodiment provides a sewage pretreatment system, comprising: a filter tank 1 and a sedimentation tank 2 which are arranged horizontally in sequence along the water flow direction, the filter tank 1 and the sedimentation tank 2 being connected through a water pipe 3; the filter tank 1 is connected to a water inlet pipe 11, a detachable grille plate 4 is arranged in the filter tank 1, the grille plate 4 is arranged obliquely, a first baffle 12 and a second baffle 13 are respectively arranged on opposite sides of the filter tank 1, the grille plate 4 is located between the first baffle 12 and the second baffle 13, and a first block 41 and a second block 42 are respectively arranged on opposite sides of the grille plate 4, the first baffle 12 , the first baffle 41, the second baffle 13 and the second baffle 42 together divide the filter tank 1 into a first chamber 15 and a second chamber 16; a plurality of baffles 5 arranged in parallel and spaced apart are provided in the sedimentation tank 2, and the baffles 5 are rotatably installed in the sedimentation tank 2 through a rotating shaft 6, and the plurality of rotating shafts 6 are driven to rotate synchronously by a driving assembly 7; when the plurality of baffles 5 are rotated to a horizontal state, two adjacent baffles 5 are connected end to end, and divide the sedimentation tank 2 into a sludge chamber and a clean water chamber, and the sedimentation tank 2 is also provided with a desilting pipe 22 and a water outlet pipe 21 connected to the sludge chamber and the clean water chamber respectively.

[0036] Specifically, the second chamber 16 is provided with an outlet (not shown in the figure) connected to the outside, and impurities falling into the second chamber 16 can be transferred through the outlet. In addition, the water delivery pipe 3 is connected to the clean water chamber, and the plurality of partitions 5 are in a vertical state under normal conditions, and rotate to a horizontal state when clean water needs to be pumped out. The water outlet pipe 21 can be connected to a water pump, and the silt removal pipe 22 can be connected to a sludge pump.

[0037] This embodiment realizes the preliminary removal of suspended matter in sewage and the natural sedimentation of particulate matter by sequentially setting the filter tank 1 and the sedimentation tank 2 along the water flow direction, and effectively improves the pretreatment efficiency. Among them, the grid plate 4 in the filter tank 1 can intercept large particles of impurities and protect the subsequent treatment equipment from clogging, and the filter tank 1 is divided into a first chamber 15 and a second chamber 16. The sewage flows in the first chamber 15 and intercepts the large particles of impurities on one side of the grid plate 4. When the impurities need to be cleaned, the grid plate 4 is moved to separate the first block 41 and the second block 42 on the grid plate 4 from the first baffle 12 and the second baffle 13 respectively, so that the opening between the first baffle 12 and the second baffle 13 can be opened, so that the impurities can fall into the second chamber 16, so as to facilitate centralized cleaning.

[0038] In addition, the sedimentation tank 2 uses gravity to settle fine particles, ensuring the preliminary purification of the effluent water quality. The rotatable design of the multiple baffles 5 in the sedimentation tank 2 allows the sedimentation tank 2 to be divided into two different chambers, namely, a sludge chamber and a clean water chamber, so that when clean water needs to be pumped out, the sludge can be isolated in the lower sludge chamber, effectively preventing the mixing of sludge and clean water and improving the effluent water quality.

[0039] In this embodiment, the larger and smaller floating objects and suspended objects in the sewage can be intercepted and precipitated through the functions of the filter tank 1 and the sedimentation tank 2, and the filter tank 1 is separated by a first chamber 15 and a second chamber 16, which can facilitate the centralized collection and cleaning of larger impurities; the sedimentation tank 2 is separated by a clean water chamber and a sludge chamber. After the sedimentation of small particles of suspended objects such as mud, sand and sludge in the sewage is completed, the sludge and the like are sealed in the sludge chamber through the function of multiple partitions 5, so that the clean water and the sludge can be effectively isolated, so that when the clean water is pumped out, the sludge will not flow out with the water flow due to rolling, thereby improving the quality of the effluent water.

[0040] In this embodiment, the inner wall of the sedimentation tank 2 is provided with a chute 14, and the grid plate 4 is movably clamped in the chute 14. A waterproof rubber strip is provided at the position in the chute 14 that contacts the grid plate 4 to prevent water from seeping out of the chute 14. The grid plate 4 is also provided with a plurality of filter holes.

[0041] The inclined grid plate 4 is designed with the chute 14, making it easier to take out and put back the grid plate 4. The staff can easily slide the grid plate 4 along the chute 14 to clean or replace it without entering the sedimentation tank 2. At the same time, the inclined grid plate 4 can reduce the amount of impurities left on the grid plate 4 to a certain extent, so that the impurities can fall into the bottom of the first chamber 15, which is convenient for quick transfer to the second chamber 16 later.

[0042] In this embodiment, the first baffle plate 12 and the first stopper 41 can abut against each other, and the abutting surfaces of the first baffle plate 12 and the first stopper 41 are inclined surfaces, and the upper surfaces of the first baffle plate 12 and the first stopper 41 are both inclined relative to the horizontal plane and intersect at the abutting surfaces of the first baffle plate 12 and the first stopper 41. Specifically, the abutting surfaces of the first baffle plate 12 and the first stopper 41 are provided with a first waterproof adhesive layer 411, and the first waterproof adhesive layer 411 can be provided on the first baffle plate 12 or on the first stopper 41.

[0043] The contact surface of the first baffle plate 12 and the second stopper 42 is an inclined surface, which can play a positioning role on the one hand, that is, when the grille plate 4 moves in the slide groove 14, it can be judged whether it moves into place through the contact surface of the first baffle plate 12 and the second stopper 42, and on the other hand, it can play a supporting role for the grille plate 4. Since the contact surface is an inclined surface, the first baffle plate 12 can effectively support the first stopper 41, thereby ensuring its stability. In addition, the upper surface of the first baffle plate 12 and the upper surface of the first stopper 41 are both inclined relative to the horizontal plane, so that the impurities falling on the surfaces of the two can slide toward the intersection, that is, when cleaning the impurities, the grille plate 4 is pulled up to open the opening between the first baffle plate 12 and the second baffle plate 13, and the impurities falling on the upper surface of the first baffle plate 12 and the upper surface of the first stopper 41 will slide into the second chamber 16 under the action of gravity.

[0044] It should be noted that the second baffle plate 13 and the second stop block 42 can abut against each other, and the abutting surface of the second baffle plate 13 and the second stop block 42 is an inclined surface. The abutting surface of the second baffle plate 13 and the second stop block 42 is provided with a second waterproof adhesive layer 421, and the second waterproof adhesive layer 421 can be provided on the second baffle plate 13 or on the second stop block 42. The connection method of the second baffle plate 13 and the second stop block 42 is the same as that of the first baffle plate 12 and the second stop block 42, that is, it can play a role in positioning and supporting, ensuring the stability of the grille plate 4 in the filter tank 1. Specifically, the first baffle plate 12, the first stop block 41, the second baffle plate 13 and the second stop block 42 of this embodiment can jointly form a stable and closed structure, so as to effectively separate the filter tank 1 into the first chamber 15 and the second chamber 16.

[0045] In this embodiment, the driving assembly 7 is arranged outside the sedimentation tank 2, one end of the rotating shaft 6 is rotatably clamped on the inner wall of the sedimentation tank 2, and the other end extends to the outside of the sedimentation tank 2, and the end of the rotating shaft 6 extending to the outside of the sedimentation tank 2 is connected to the driving assembly 7. Specifically, the end of the rotating shaft 6 clamped on the inner wall of the sedimentation tank 2 can reduce the opening of the sedimentation tank 2 communicating with the outside, the rotating shaft 6 is penetrated in the sedimentation tank 2, and the connection between the rotating shaft 6 and the sedimentation tank 2 can be connected through a bearing, wherein a waterproof rubber ring can be provided at the bearing to prevent water from leaking from the connection between the sedimentation tank 2 and the rotating shaft 6.

[0046] The drive assembly 7 is installed outside the sedimentation tank 2, and only one end of the drive shaft 6 located outside the sedimentation tank 2 is needed to drive it to rotate, which not only avoids direct contact between the drive components and water, reduces the risk of corrosion and wear, but also provides a more spacious and safe operating space for technicians. When the drive assembly 7 needs to be maintained or replaced, there is no need to enter the sedimentation tank 2, which reduces the difficulty of operation and safety risks.

[0047] In this embodiment, the driving assembly 7 includes a motor 71, a main gear 72 connected to the output shaft of the motor 71, a slave gear 73 connected to the rotating shaft 6, and a toothed belt 74, and the toothed belt 74 is used to connect the main gear 72 and the slave gear 73 on each rotating shaft 6. The motor 71 is installed outside the sedimentation tank 2 through a base, and each rotating shaft 6 is connected to a slave gear 73, and each slave gear 73 is located on the same horizontal plane.

[0048] This embodiment uses a toothed belt 74 as a transmission medium, which has the characteristics of high transmission efficiency and low friction loss. The toothed belt 74 is tightly meshed with the main gear 72 and the slave gear 73, which can ensure the smooth transmission of power. In addition, by transmitting the power of the motor 71 to the slave gear 73 on each rotating shaft 6 through the toothed belt 74, it can ensure that all the partitions 5 rotate synchronously, avoiding vibration and noise caused by asynchronism.

[0049] Of course, as another embodiment, each rotating shaft 6 can also be kept synchronous by a chain drive or a belt drive. In addition, it can also be controlled by an independent motor 71, that is, each rotating shaft 6 is equipped with a motor 71 for driving.

[0050] In this embodiment, the rotating shaft 6 is close to the lower end of the partition 5, and the lower end of the partition 5 is the end close to the bottom of the sedimentation tank 2 in the vertical state. It should be noted that when the partition 5 is in the vertical state, its lower end should still be a distance away from the bottom of the sedimentation tank 2 to avoid contact between the partition 5 and the bottom of the sedimentation tank 2.

[0051] In this embodiment, the rotating shaft 6 is designed at the lower end of the partition 5, so that the partition 5 can reduce the stirring of the sludge when it is flipped, and can effectively prevent the partition 5 from scraping the sludge into the clean water chamber when it is flipped, thereby ensuring that the partition 5 can seal most of the sludge in the sludge chamber to further improve the water quality.

[0052] In this embodiment, a first inclined plane 51 is provided at the upper end of the partition 5, and a second inclined plane 52 parallel to the first inclined plane 51 is provided at the lower end of the partition 5. When the partition 5 is in a horizontal state, the first inclined plane 51 and the second inclined plane 52 on two adjacent partitions 5 can fit each other. In this embodiment, the partition 5 is in a vertical state as a reference, and the first inclined plane 51 on the partition 5 is inclined to the lower right. The partition 5 rotates in a clockwise direction when rotating. When it rotates to a horizontal state, the first inclined plane 51 just fits with the second inclined plane 52 on the partition 5 adjacent to the right.

[0053] In this embodiment, the first inclined plane 51 and the second inclined plane 52 of the two adjacent horizontal partitions 5 fit together to form a tight sealing surface, which effectively prevents water from flowing in the gap between the partitions 5 and ensures that clean water and sludge can be separated according to a predetermined path. In addition, the design of the first inclined plane 51 can prevent sludge from accumulating on the upper end of the partition 5, and the design of the second inclined plane 52 can make the partition 5 form a complete fit with the adjacent partition 5 when it is horizontal. Multiple partitions 5 can all maintain a horizontal state and form mutual support and positioning at the same time. The first inclined plane 51 rotates into place after contacting the second inclined plane 52, which not only improves the stability of its structure, but also improves the accuracy of its positioning.

[0054] It should be noted that the lower end of the partition 5 is further provided with an arc surface 53, which is connected to the second inclined plane 52. Similarly, based on the vertical state of the partition 5, the second inclined plane 52 is located on the left side of the partition 5, and the arc surface 53 is located on the right side of the partition 5.

[0055] Since the lower end of the partition 5 may come into contact with silt when there is a lot of silt accumulation, the design of the arc surface 53 can to some extent prevent the partition 5 from being attached to silt when it is turned over, that is, the silt will not be attached to the lower end of the partition 5, which can further reduce the silt from entering the clean water chamber. In addition, the design of the arc surface 53 also helps to disperse the pressure and stress on the partition 5, thereby improving the structural strength of the partition 5.

[0056] In this embodiment, a stopper 23 is provided on the inner wall of the sedimentation tank 2, and a third inclined plane 231 is provided on the stopper 23, and the third inclined plane 231 can be matched with the first inclined plane 51 on the partition 5 at one end. Specifically, based on the direction of water flow, the water flows from left to right, and the stopper 23 cooperates with the partition 5 at the far right, that is, when the partition 5 at the far right is rotated to the horizontal, its first inclined plane 51 just fits with the third inclined plane 231.

[0057] The limit block 23 of this embodiment and the third inclined plane 231 thereon can not only provide physical support for the partition 5 and reduce the load borne by the driving assembly 7, but also enhance the stability of the partition 5 in the sedimentation tank 2 by the inclined surface fitting. The partition 5 is effectively prevented from displacement or shaking due to water flow impact or long-term operation, and the overall structural safety and stable operation of the sedimentation tank 2 are guaranteed.

[0058] In this embodiment, the grid plate 4 is tilted, and the inner wall of the sedimentation tank 2 is provided with a slide groove 14, and the grid plate 4 is movably clamped in the slide groove 14. The grid plate 4 can be disassembled by manual pulling when disassembling for maintenance, or a driving mechanism such as a cylinder can be connected to the grid plate 4 to achieve automatic disassembly through cylinder drive.

[0059] The inclined grid plate 4 is designed with the chute 14, making it easier to take out and put back the grid plate 4. The staff can easily slide the grid plate 4 along the chute 14 to clean or replace it without entering the sedimentation tank 2. At the same time, the inclined grid plate 4 can reduce the amount of impurities left on the grid plate 4 to a certain extent, so that the impurities can fall to the bottom of the filter tank 1, which is convenient for later cleaning.

[0060] It should be noted that a plurality of filter holes are provided on the grid plate 4. The design of the plurality of filter holes on the grid plate 4 can effectively intercept suspended matter, impurities and particulate matter in the water flow and prevent them from entering the subsequent treatment stage of the sedimentation tank 2. In addition, the design of the filter holes is flexible, and the size, shape and distribution of the filter holes on the grid plate 4 can be adjusted to flexibly control the filtering accuracy of the sedimentation tank 2.

[0061] In the description of the present invention, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sewage pretreatment system, characterized in that: include: A filter tank and a sedimentation tank are arranged horizontally in sequence along the water flow direction, and the filter tank and the sedimentation tank are connected through a water pipe; The filter tank is connected to a water inlet pipe, a detachable grille plate is provided in the filter tank, the grille plate is tilted, a first baffle and a second baffle are provided on opposite sides of the filter tank, the grille plate is located between the first baffle and the second baffle, and a first block and a second block are provided on opposite sides of the grille plate, the first baffle, the first block, the second baffle and the second block together separate the filter tank into a first chamber and a second chamber; The sedimentation tank is provided with a plurality of partitions arranged in parallel and at intervals, and the partitions are rotatably installed in the sedimentation tank through rotating shafts, and the plurality of rotating shafts are driven to rotate synchronously by a driving assembly; when the plurality of partitions are rotated to a horizontal state, two adjacent partitions are connected end to end, and the sedimentation tank is divided into a sludge chamber and a clean water chamber, and the sedimentation tank is also provided with a silt removal pipe and a water outlet pipe respectively connected to the sludge chamber and the clean water chamber.

2. The sewage pretreatment system according to claim 1, characterized in that: The inner wall of the sedimentation tank is provided with a slide groove, and the grid plate is movably clamped in the slide groove.

3. The sewage pretreatment system according to claim 1, characterized in that: The first baffle plate and the first stop block can abut against each other, and the abutting surfaces of the first baffle plate and the first stop block are inclined surfaces, and the upper surfaces of the first baffle plate and the first stop block are inclined compared to the horizontal plane and meet at the abutting surfaces of the first baffle plate and the first stop block.

4. The sewage pretreatment system according to claim 1, characterized in that: The second baffle plate and the second stopper may abut against each other, and the abutting surfaces of the second baffle plate and the second stopper are inclined surfaces.

5. The sewage pretreatment system according to claim 1, characterized in that: The driving assembly is arranged outside the sedimentation tank, one end of the rotating shaft is rotatably clamped on the inner wall of the sedimentation tank, and the other end extends to the outside of the sedimentation tank, and the end of the rotating shaft extending outside the sedimentation tank is connected to the driving assembly.

6. The sewage pretreatment system according to claim 5, characterized in that: The driving assembly includes a motor, a main gear connected to the output shaft of the motor, a slave gear connected to the rotating shaft, and a toothed belt, wherein the toothed belt is used to connect the main gear and the slave gear on each of the rotating shafts.

7. The sewage pretreatment system according to claim 1, characterized in that: The rotating shaft is close to the lower end of the partition, and the lower end of the partition is an end close to the bottom of the sedimentation tank in a vertical state.

8. The sewage pretreatment system according to claim 7, characterized in that: The upper end of the partition is provided with a first inclined plane, and the lower end of the partition is provided with a second inclined plane parallel to the first inclined plane. When the partition is in a horizontal state, the first inclined plane and the second inclined plane on two adjacent partitions can fit each other.

9. The sewage pretreatment system according to claim 8, characterized in that: The lower end of the partition is also provided with an arc surface, and the arc surface is connected to the second inclined plane.

10. The sewage pretreatment system according to claim 8, characterized in that: The inner side wall of the sedimentation tank is provided with a limit block, and the limit block is provided with a third inclined plane, and the third inclined plane can be fitted with the first inclined plane on the partition located at the head end.

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