A self-cleaning wastewater treatment system

Abstract

The present application relates to the field of wastewater treatment, and particularly relates to a self-cleaning wastewater treatment system. Two ends of a filter cylinder are connected with extension pipes, and end covers are arranged on the extension pipes. A cleaning shaft is arranged in the filter cylinder and penetrates the end cover. The cleaning shaft is connected with spiral conveying leaves, and the spiral conveying leaves are located in the filter cylinder. The cleaning shaft is tubular, and the cleaning shaft is provided with a gap which extends in a spiral shape. An adjusting shaft is arranged in the cleaning shaft. The adjusting shaft is provided with a connecting block and a matching block. The matching block is located between two adjacent spiral turns of the spiral conveying leaves and extends in a spiral shape. The connecting block is located in the gap, and the matching block and the adjusting shaft are fixedly connected by the connecting block. The filter cylinder is arranged in a sleeve. The end cover is connected with a first channel and a second channel. The first channel is used for inputting wastewater to be filtered, and the second channel is used for collecting impurities filtered out. The self-cleaning wastewater treatment system can realize self-cleaning of the filter plate while filtering, and cleaning is not required during shutdown.

Description

Technical Field

[0001] The present invention relates to the field of wastewater treatment, in particular to a self-cleaning wastewater treatment system. Background Art

[0002] During the wastewater treatment process, to ensure stable filtration results, the filter screens and filter plates of the filtration devices need to be cleaned regularly. Currently, to minimize the impact on wastewater treatment, cleaning the filter screens and filter plates is typically done by dividing the filtration devices into two groups, with the two groups alternating to perform filtration. This allows for alternating cleaning of the filter screens and filter plates of the two groups.

[0003] While this method allows for clean screens and plates while retaining some active filtering devices, some of the filtering devices are shut down for cleaning at the same time, limiting the amount of filtration per unit time. To increase the amount of filtration per unit time, more filtering devices would be required, significantly increasing costs.

[0004] In view of this, this application is hereby filed. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-cleaning wastewater treatment system, which can realize self-cleaning of the filter plate during filtration without stopping for cleaning. While ensuring the filtration effect, it effectively reduces the impact on the filtration volume per unit time. When achieving the same filtration volume per unit time, the number of equipment required is less, which helps to reduce the equipment configuration cost.

[0006] The embodiment of the present invention is achieved as follows:

[0007] A self-cleaning wastewater treatment system comprises a filter cartridge, a cleaning shaft, an adjusting shaft, a sleeve, an end cover, a first channel and a second channel.

[0008] The filter cartridge is cylindrical and has filter holes. Extension tubes are coaxially fixedly connected to both ends of the filter cartridge. The inner diameter of the extension tube is the same as that of the filter cartridge. An end cap is installed at the end of the extension tube away from the filter cartridge to seal it.

[0009] The cleaning shaft is arranged in the filter cartridge and coaxially with the filter cartridge. Both ends of the cleaning shaft pass through the end cover. The cleaning shaft is rotatably matched with the end cover and is rotationally sealed with the end cover.

[0010] The outer wall of the cleaning shaft is fixedly connected with a spiral conveying blade, which is located in the filter cartridge and continuously rotated along the axial direction of the cleaning shaft. Both ends of the spiral conveying blade extend into the end cover, and the inner walls of both the filter cartridge and the extension tube are in contact with the spiral conveying blade.

[0011] The cleaning shaft is tubular, and a notch is provided on the side wall of the cleaning shaft to pass through the cleaning shaft. The notch is located between two adjacent spiral circles of the spiral conveying blade. The notch extends into a spiral shape along the spiral extension direction of the spiral conveying blade, and the two ends of the notch extend to the two ends of the spiral conveying blade respectively.

[0012] The adjustment shaft rotatably fits within the cleaning shaft, forming a rotational seal between the two shafts. The adjustment shaft comprises a connecting block and a mating block. The mating block is positioned between two adjacent turns of the spiral conveying blade. The mating block extends continuously in a spiral shape along the spiral direction of the spiral conveying blade, and the number of spiral turns corresponding to the mating block is greater than or equal to one.

[0013] The side walls of the matching block are both in contact with and slidingly sealed against the two adjacent spiral circles of the spiral conveying blade, the side surface of the matching block away from the cleaning shaft is in contact with and slidingly sealed against the inner wall of the filter cartridge, and the side surface of the matching block close to the cleaning shaft is in contact with and slidingly sealed against the outer wall of the cleaning shaft.

[0014] The connecting block is located in the notch and can be slidably engaged with the notch along the spiral direction of the notch. The engaging block and the adjusting shaft are fixedly connected by the connecting block.

[0015] Both ends of the sleeve are closed by a first sealing plate, the filter cartridge is arranged inside the sleeve, and the extension pipes at both ends of the filter cartridge respectively penetrate the first sealing plates at both ends of the sleeve, and the extension pipes and the first sealing plates are fixedly sealed.

[0016] Each end shield is connected to a first channel above, which is used to input wastewater to be filtered. A second channel is connected to the bottom of each end shield, which is used to collect filtered impurities. Switching mechanisms control the connections between the first channel and the end shield, and between the second channel and the end shield.

[0017] Furthermore, the cleaning shaft is driven by a first driver, and the adjusting shaft is driven by a second driver. The self-cleaning wastewater treatment system also includes a controller. The controller is configured to control the first and second drivers to adjust the relative speeds of the cleaning shaft and the adjusting shaft, thereby adjusting the position of the mating block on the cleaning shaft.

[0018] Furthermore, both ends of the adjusting shaft extend beyond the cleaning shaft, and the length of the adjusting shaft is greater than twice the length of the cleaning shaft.

[0019] The adjusting shaft sleeve is provided with a drive sleeve, which is located outside the cleaning shaft. The drive sleeve is fixedly engaged with the adjusting shaft along the circumference of the adjusting shaft. The drive sleeve is slidably engaged with the adjusting shaft along the axial direction of the adjusting shaft. The drive sleeve is driven by a second driver.

[0020] Further, the connecting blocks also extend helically along the helical direction of the gap. Along the helical direction of the helical conveying blade, the length of the connecting blocks is the same as that of the matching blocks, and the two end faces of the connecting blocks are flush with the two end faces of the matching blocks, respectively.

[0021] Further, the outer side wall of the adjusting shaft is in abutment and rotation sealing with the inner side wall of the cleaning shaft.

[0022] Further, the inner side wall of the cleaning shaft is provided with a first matching groove, the first matching groove is located between the adjacent two turns of the gap, the first matching groove also extends helically along the helical direction of the helical conveying blade, and the two ends of the first matching groove extend to the two end faces of the cleaning shaft, respectively.

[0023] The outer side wall of the adjusting shaft is provided with a first protrusion for matching with the first matching groove, the first protrusion also extends helically along the helical direction of the helical conveying blade, and the two ends of the first protrusion extend to the two end faces of the adjusting shaft, respectively.

[0024] Further, the bottom wall of the first matching groove is also provided with a second matching groove, the second matching groove extends along the extension direction of the first matching groove, and the length of the second matching groove is the same as that of the first matching groove.

[0025] The outer side wall of the cleaning shaft is also provided with a containing groove, the containing groove is provided correspondingly to the second matching groove, the containing groove also extends along the extension direction of the second matching groove, and the two ends of the cleaning shaft are both provided with the containing groove, which is located in the end cover.

[0026] The containing groove contains a moving block, a plurality of moving blocks are sequentially distributed along the extension direction of the containing groove and completely fill the containing groove, each moving block is fixedly connected with a top rod, and the top rod is arranged along the radial direction of the cleaning shaft and penetrates into the second matching groove. The top rod is matched with an elastic member, so that the moving block is received in the containing groove in a natural state.

[0027] The side surface of the first protrusion away from the adjusting shaft is also provided with a second protrusion for matching with the second matching groove, and the two ends of the adjusting shaft are both provided with the second protrusion, which extends along the extension direction of the first protrusion.

[0028] The second protrusion is configured as follows: during the movement of the matching block into the end cover along the cleaning shaft, when the matching block just blocks the flow-through space between the extension pipe and the filter cartridge, the second protrusion does not move to the top rod. During the continuous movement of the matching block into the end cover along the cleaning shaft, when the flow-through space between the extension pipe and the filter cartridge is about to be opened, the second protrusion moves to the top rod and lifts all the top rods to the side where the containing groove is located, so that the moving blocks are partially extruded from the containing grooves to form a helical rib.

[0029] Furthermore, one end of the first channel away from the end shield is closed by a second sealing plate, and an input pipe for introducing wastewater to be filtered is provided on a side wall of one end of the first channel close to the end shield.

[0030] A push block is arranged in the first channel. The push block is slidably fitted in the first channel along the axial direction of the first channel. The push block adheres to the inner wall of the first channel and forms a sliding seal.

[0031] A first groove and a second groove are provided on the surface of one side of the push block close to the end cover. Both the first groove and the second groove extend along the axial direction of the cleaning shaft. The second groove is located on the side of the first groove away from the filter cartridge. The second groove penetrates to the end groove wall of the first groove away from the filter cartridge.

[0032] The cross-sections of the groove cavities of the first groove and the second groove are both semicircular, and the cylinders corresponding to the groove walls of the two groove cavities are coaxially arranged. The diameter of the cylinder corresponding to the groove wall of the groove cavity of the first groove is the same as the inner diameter of the filter cartridge, and the diameter of the cylinder corresponding to the groove wall of the groove cavity of the second groove is equal to: the outer diameter of the cleaning shaft + the protruding height of the moving block when it protrudes from the accommodating groove * 2.

[0033] Furthermore, the switch mechanism includes: a partition and a driving assembly for driving the partition.

[0034] In the first channel, the partition is arranged perpendicular to the axial direction of the first channel, passes through the side wall of the first channel and is slidably fitted in the first channel, and a sliding seal is formed between the partition and the side wall of the first channel.

[0035] In the second channel, the partition is arranged perpendicular to the axial direction of the second channel, passes through the side wall of the second channel and is slidably fitted in the second channel, and a sliding seal is formed between the partition and the side wall of the second channel.

[0036] The beneficial effects of the technical solutions of the embodiments of the present invention include:

[0037] The self-cleaning wastewater treatment system provided by the embodiment of the present invention can clean the impurities filtered out of the filter cartridge without completely shutting down, clean the spiral conveying blades at the same time, and reduce the wastewater content of the impurities. The cleaning process does not require manual assistance and is simple and fast.

[0038] In general, the self-cleaning wastewater treatment system provided by the embodiment of the present invention can achieve self-cleaning of the filter plate while filtering, without the need to stop for cleaning. While ensuring the filtering effect, it effectively reduces the impact on the filtration volume per unit time. The number of equipment required to achieve the same filtration volume per unit time is less, which helps to reduce equipment configuration costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 A schematic diagram of the overall structure of a self-cleaning wastewater treatment system provided by an embodiment of the present invention;

[0041] Figure 2 is a schematic diagram of the main part of the self-cleaning wastewater treatment system;

[0042] Figure 3 It is a schematic diagram of the matching at the end shield;

[0043] Figure 4 This is a schematic diagram of the coordination between the cleaning shaft and the adjusting shaft;

[0044] Figure 5 It is a structural diagram of the cleaning shaft;

[0045] Figure 6 It is a structural diagram of the adjustment shaft;

[0046] Figure 7 It is the coordination diagram of the coordination block;

[0047] Figure 8 It is a schematic diagram of the matching block moving to the end shield;

[0048] Figure 9 is a schematic diagram of the cross section corresponding to the matching block;

[0049] Figure 10 Schematic diagram of the internal structure of the cleaning shaft;

[0050] Figure 11 is a schematic diagram of a first matching groove and a second matching groove;

[0051] Figure 12 This is a schematic diagram of the receiving slot (the motion block is stored in the receiving slot);

[0052] Figure 13 Schematic diagram of the motion block (the motion block is stored in the receiving slot);

[0053] Figure 14 for Figure 13 A partial enlarged view of the middle push rod;

[0054] Figure 15 for Figure 6 Enlarged view of area A in the middle;

[0055] Figure 16 for Figure 6 Enlarged view of area B in the middle;

[0056] Figure 17 The figure is a schematic diagram of the cooperation of the motion block (the motion block partially extends out of the accommodation slot);

[0057] Figure 18 It is a schematic diagram when the push block is pushed to the end position;

[0058] Figure 19 It is a structural diagram of the push block;

[0059] Figure 20 This is a schematic diagram of the state when the self-cleaning wastewater treatment system starts to clean impurities in the end cover;

[0060] Figure 21 This is a schematic diagram of the state when the push block of the self-cleaning wastewater treatment system is pushed to the end position.

[0061] Description of reference numerals:

[0062] Filter cartridge 100; extension tube 110; cleaning shaft 200; spiral conveying blade 210; notch 220; first mating groove 230; second mating groove 240; accommodating groove 250; moving block 251; push rod 252; elastic member 253; rib 260; adjusting shaft 300; connecting block 310; mating block 320; driving sleeve 330; bracket 331; first protrusion 340; second protrusion 350; sleeve 400; first sealing plate 410; end cover 500; first channel 600; second sealing plate 610; inlet pipe 620; push block 630; first groove 631; second groove 632; second channel 700; partition 800. DETAILED DESCRIPTION

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0064] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0065] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0066] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0067] Furthermore, the terms "parallel" and "perpendicular" do not necessarily mean that the components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that the direction is more parallel than "perpendicular," not that the structure must be completely parallel, but rather that it can be slightly tilted.

[0068] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0069] In order to overcome the shortcomings of the existing technology, please refer to Figure 1-Figure 7 This embodiment provides a self-cleaning wastewater treatment system, which includes: a filter cartridge 100, a cleaning shaft 200, an adjustment shaft 300, a sleeve 400, an end cover 500, a first channel 600 and a second channel 700.

[0070] The filter cartridge 100 is cylindrical and has filter holes formed therein. The filter holes are distributed in an array along the surface of the filter cartridge 100. In this embodiment, the surface of the filter cartridge 100 is covered with filter holes.

[0071] Both end surfaces of the filter cartridge 100 are coaxially fixedly connected with an extension tube 110 . The inner diameter of the extension tube 110 is the same as that of the filter cartridge 100 , and the outer diameter of the extension tube 110 is also the same as that of the filter cartridge 100 .

[0072] An end cover 500 is provided on the side of the extension tube 110 away from the filter cartridge 100 . The end cover 500 is provided on the end surface of the extension tube 110 away from the filter cartridge 100 , and the end cover 500 closes the end of the extension tube 110 away from the filter cartridge 100 .

[0073] The cleaning shaft 200 is disposed in the filter cartridge 100 and is coaxially arranged with the filter cartridge 100 . Both ends of the cleaning shaft 200 pass through the end cover 500 . The cleaning shaft 200 is rotatably fitted with the end cover 500 and is rotationally sealed with the end cover 500 .

[0074] A spiral conveying blade 210 is fixedly connected to the outer wall of the cleaning shaft 200. The spiral conveying blade 210 is located within the filter cartridge 100 and is continuously wound along the axial direction of the cleaning shaft 200. Both ends of the spiral conveying blade 210 extend into the end shield 500. In this embodiment, the spiral conveying blade 210 extends from the filter cartridge 100 to the extension tube 110, and then extends from the extension tube 110 into the end shield 500. The spiral conveying blade 210 extends just inside the end shield 500, and a gap is formed between the end of the spiral conveying blade 210 and the inner wall of the end shield 500 away from the filter cartridge 100.

[0075] The inner sidewalls of both the filter cartridge 100 and the extension tube 110 are in contact with the spiral conveying blade 210 .

[0076] The cleaning shaft 200 is in the shape of a circular tube. A notch 220 is formed in the sidewall of the cleaning shaft 200, extending therethrough. The notch 220 is located between two adjacent turns of the spiral conveying blade 210. The notch 220 extends in a spiral shape along the spiral extension direction of the spiral conveying blade 210. In other words, the pitch of the notch 220 is the same as the pitch of the spiral conveying blade 210. The two ends of the notch 220 extend to the two ends of the spiral conveying blade 210.

[0077] In this embodiment, both ends of the notch 220 also extend into the end covers 500 at both ends, and a distance is left between the notch 220 and the end surface of the cleaning shaft 200 .

[0078] The adjusting shaft 300 is cylindrical and is rotatably fitted into the cleaning shaft 200 , with a rotational seal formed between the adjusting shaft 300 and the cleaning shaft 200 .

[0079] The adjusting shaft 300 has a connecting block 310 and a matching block 320 .

[0080] The mating block 320 is positioned between two adjacent spiral turns of the spiral conveyor blade 210. The mating block 320 extends continuously in a spiral shape along the spiral direction of the spiral conveyor blade 210, and the number of spiral turns corresponding to the mating block 320 is greater than or equal to one. Optionally, the number of spiral turns corresponding to the mating block 320 is two, but this is not limited to this and can be flexibly set according to actual needs. In this embodiment, the number of spiral turns corresponding to the mating block 320 is two.

[0081] The side walls of the mating block 320 are both in contact with and slidingly sealed against the two adjacent spiral turns of the spiral conveying blade 210. The side surface of the mating block 320 away from the cleaning shaft 200 is in contact with and slidingly sealed against the inner wall of the filter cartridge 100. The side surface of the mating block 320 close to the cleaning shaft 200 is in contact with and slidingly sealed against the outer wall of the cleaning shaft 200.

[0082] The connecting block 310 is located within the notch 220. It slidably engages with the notch 220 along the spiral direction of the notch 220. The connecting block 310 securely connects the engaging block 320 to the adjustment shaft 300. In other words, when the adjustment shaft 300 and the cleaning shaft 200 rotate relative to each other, the engaging block 320 spirals along the spiral conveying blade 210, and the connecting block 310 also spirals along the notch 220, thereby simultaneously generating axial relative motion between the adjustment shaft 300 and the cleaning shaft 200.

[0083] In this embodiment, the cleaning shaft 200 is driven by a first driver (not shown), and the adjustment shaft 300 is driven by a second driver (not shown). The self-cleaning wastewater treatment system also includes a controller (not shown). The controller is configured to control the first and second drivers to adjust the relative rotational speeds of the cleaning shaft 200 and the adjustment shaft 300, thereby adjusting the position of the mating block 320 on the cleaning shaft 200.

[0084] Specifically, both ends of the adjusting shaft 300 extend outside the cleaning shaft 200 , and the length of the adjusting shaft 300 is greater than twice the length of the cleaning shaft 200 .

[0085] The adjustment shaft 300 is sleeved with a drive sleeve 330, which is positioned outside the cleaning shaft 200. The drive sleeve 330 is fixedly engaged with the adjustment shaft 300 along its circumference. Axially, the drive sleeve 330 slides with the adjustment shaft 300. The drive sleeve 330 is driven by a second driver. Optionally, the drive sleeve 330 is mounted to the outer wall of the end shield 500 via a bracket 331, which is rotatably engaged with the bracket 331.

[0086] The ends of the casing 400 are sealed by first sealing plates 410. The filter cartridge 100 is disposed within the casing 400. Extension tubes 110 at both ends of the filter cartridge 100 extend through the first sealing plates 410 at each end of the casing 400, forming a fixed, sealed connection between the extension tubes 110 and the first sealing plates 410. An output pipe (not shown) is connected to the casing 400 to discharge the wastewater in the casing 400.

[0087] The top of each end cap 500 is connected to a first channel 600 for inputting wastewater to be filtered. The bottom of each end cap 500 is connected to a second channel 700 for collecting filtered impurities. The connections between the first channel 600 and the end cap 500, and between the second channel 700 and the end cap 500, are both controlled by a switch mechanism.

[0088] Optionally, the switch mechanism includes: a partition 800 and a driving assembly (not shown in the figure) for driving the partition 800.

[0089] In the first channel 600, the partition 800 is arranged perpendicular to the axial direction of the first channel 600. The partition 800 penetrates the sidewall of the first channel 600 and slides in the first channel 600, forming a sliding seal between the partition 800 and the sidewall of the first channel 600. When the first channel 600 and the end cover 500 need to be disconnected, the partition 800 is driven by the drive assembly to extend into the first channel 600, thereby blocking the first channel 600.

[0090] In the second channel 700, the partition 800 is arranged perpendicular to the axial direction of the second channel 700. The partition 800 penetrates the side wall of the second channel 700 and slides in the second channel 700, forming a sliding seal between the partition 800 and the side wall of the second channel 700. When it is necessary to disconnect the second channel 700 from the end cover 500, the drive assembly drives the partition 800 to extend into the second channel 700, thereby blocking the second channel 700.

[0091] The specific structure of the switch mechanism can be flexibly adjusted according to actual conditions and is not limited thereto.

[0092] To facilitate a clearer and more intuitive introduction to the working principle of the self-cleaning wastewater treatment system, the following will be described in detail with reference to the accompanying drawings, with the viewing angles in the drawings as a reference. It should be noted that the description based on the viewing angles in the drawings is only for simplification of the description and does not limit the scope of protection of this application.

[0093] During the working process of the self-cleaning wastewater treatment system, Figure 1 As shown, the switch mechanisms of the first channel 600 and the second channel 700 on the right are closed, the switch mechanism of the first channel 600 on the left is opened, and the switch mechanism of the second channel 700 on the left is closed. At this time, the wastewater to be filtered can only enter the left end cap 500 from the left first channel 600, and then enter the filter cartridge 100 from the left end cap 500 through the left extension tube 110.

[0094] During filtration, the wastewater to be filtered, restricted by the spiral conveying blades 210, can only flow along the spiral flow space defined by the spiral conveying blades 210 after entering the extension tube 110 and the filter cartridge 100. When the wastewater to be filtered reaches the mating block 320, it is blocked by the mating block 320, and the wastewater to be filtered cannot continue to flow along the axial direction of the filter cartridge 100. In other words, by adjusting the position of the mating block 320 in the filter cartridge 100, the distance between the wastewater inlet end of the filter cartridge 100 and the mating block 320 can be changed, thereby changing the length of the filter cartridge 100 available for filtering wastewater, thereby adjusting the upper limit of the filtration volume per unit time of the self-cleaning wastewater treatment system. Typically, when wastewater enters from the left end of the filter cartridge 100, the mating block 320 can be adjusted to the rightmost end of the filter cartridge 100. When wastewater enters from the right end of the filter cartridge 100, the mating block 320 can be adjusted to the leftmost end of the filter cartridge 100 to increase the filtration volume per unit time.

[0095] After being filtered by the filter cartridge 100 , the filtered wastewater enters the sleeve 400 , and the filtered impurities remain in the filter cartridge 100 .

[0096] When cleaning the filter cartridge 100 is required, the switch mechanism of the left first channel 600 is closed. The second driver drives the adjustment shaft 300, causing the mating block 320 to move along the spiral conveying blade 210 toward the left end shield 500 (the end shield 500 corresponding to the wastewater inlet). Alternatively, while the second driver drives the adjustment shaft 300, the first driver also drives the cleaning shaft 200, causing the spiral conveying blade 210 to move toward the left end shield 500 (the end shield 500 corresponding to the wastewater inlet). Simultaneously, a speed difference is controlled between the cleaning shaft 200 and the adjustment shaft 300, causing the mating block 320 to move along the spiral conveying blade 210 toward the left end shield 500 (the end shield 500 corresponding to the wastewater inlet).

[0097] In the above process, the impurities filtered out of the filter cartridge 100 are pushed to the left end cover 500 by the matching block 320 (or by the matching block 320 and the spiral conveying blade 210). Since the first channel 600 and the second channel 700 on the left are both closed, the impurities will not continue to move after being pushed into the end cover 500. In other words, this process is equivalent to squeezing the impurities after pushing them into the end cover 500. During the squeezing process, the water in the impurities enters the sleeve 400 from the filter holes of the filter cartridge 100, which effectively reduces the amount of waste water in the impurities. At the same time, the matching block 320 can clean the spiral conveying blade 210 while cleaning the filter cartridge 100, such as Figure 8 shown.

[0098] As the matching block 320 gradually moves toward the left end cap 500, Figure 9 As shown, when the cross section S1 corresponding to the engaging block 320 moves into the extension pipe 110, the engaging block 320 completely blocks the flow space between the extension pipe 110 and the filter cartridge 100, at this time, the residual wastewater in the end cover 500 cannot continue to enter the sleeve 400, of course, the filtered wastewater in the sleeve 400 cannot return to the end cover 500.

[0099] In this way, the switch mechanism of the second channel 700 can be opened, and the impurities squeezed in the end cover 500 can be discharged through the second channel 700, realizing unified recovery of the impurities and facilitating subsequent treatment of the impurities.

[0100] During the discharge of the impurities, the cleaning shaft 200 and the adjusting shaft 300 can be controlled to rotate synchronously at the same speed and in the same direction, so that the conveying direction of the spiral conveying blade 210 is towards the left end cover 500. In this way, the impurities in the end cover 500 can be promoted to enter the second channel 700.

[0101] Alternatively, the cleaning shaft 200 and the adjusting shaft 300 can be controlled to rotate synchronously at different speeds and in the same direction, so that the conveying direction of the spiral conveying blade 210 is towards the left end cover 500, and the engaging block 320 continues to move into the end cover 500. It should be noted that when the engaging block 320 continues to move into the end cover 500, as shown, the cross section S2 corresponding to the engaging block 320 cannot move out of the extension pipe 110, that is, the cross section S2 corresponding to the engaging block 320 needs to remain in the extension pipe 110, so as to ensure that the engaging block 320 can block the flow space between the extension pipe 110 and the filter cartridge 100. In this way, the engaging block 320 can further move into the end cover 500, and the impurities in the end cover 500 can be further promoted to enter the second channel 700. Figure 9

[0102] It can be understood that an auxiliary assembly for promoting the smooth conveying of the impurities can be arranged in the second channel 700, including but not limited to a spiral conveying shaft.

[0103] It should be noted that when the impurities in the filter cartridge 100 located on the left side (close to the side where the wastewater enters previously) of the engaging block 320 are cleaned, that is, during the movement of the engaging block 320 to the left side, since the filter cartridge 100 on the right side of the engaging block 320 is the part that has been cleaned, the switch mechanism of the right first channel 600 can be opened, and the wastewater filtration can be continued by using the part of the filter cartridge 100 located on the right side of the engaging block 320, without the need for complete shutdown.

[0104] ​After the impurities in the left end cover 500 are cleaned (fully discharged into the second channel 700), the filter cartridge 100 (the part located on the right side of the matching block 320) can be cleaned again as needed. The specific operation method is the same as above and will not be repeated here.

[0105] Through the above design, the impurities filtered out of the filter cartridge 100 can be cleaned without completely shutting down the machine, and the spiral conveying blade 210 can be cleaned at the same time, which can also reduce the wastewater content in the impurities. The cleaning process does not require manual assistance and is simple and quick.

[0106] In general, the self-cleaning wastewater treatment system provided in this embodiment can achieve self-cleaning of the filter plate while filtering, without the need to stop for cleaning. While ensuring the filtering effect, it effectively reduces the impact on the filtration volume per unit time. The number of equipment required to achieve the same filtration volume per unit time is less, which helps to reduce equipment configuration costs.

[0107] In this embodiment, the connecting block 310 also extends in a spiral shape along the spiral direction of the notch 220. Along the spiral direction of the spiral conveying blade 210, the length of the connecting block 310 is the same as that of the mating block 320, and the end faces of the connecting block 310 are flush with the end faces of the mating block 320. This design effectively prevents impurities from accidentally becoming lodged in the notch 220 during movement of the mating block 320, particularly preventing impurities from becoming lodged in the notch 220 on the inner side of the mating block 320.

[0108] The outer wall of the adjusting shaft 300 is in contact with the inner wall of the cleaning shaft 200 and rotates in a sealed manner, thereby preventing waste water and impurities from entering the cleaning shaft 200 .

[0109] Further, please combine Figure 10 and Figure 11 A first matching groove 230 is provided on the inner side wall of the cleaning shaft 200. The first matching groove 230 is located between two adjacent spiral circles of the notch 220. The first matching groove 230 also extends continuously into a spiral shape along the spiral direction of the spiral conveying blade 210. The first matching groove 230 has the same pitch as the spiral conveying blade 210. The two ends of the first matching groove 230 extend to the end faces of the cleaning shaft 200 respectively.

[0110] The outer wall of the adjustment shaft 300 is provided with a first protrusion 340 for cooperating with the first cooperating groove 230. The first protrusion 340 also extends continuously into a spiral shape along the spiral direction of the spiral conveying blade 210. The pitch of the first protrusion 340 is also the same as the pitch of the spiral conveying blade 210. The two ends of the first protrusion 340 extend to the end faces of the adjustment shaft 300 respectively.

[0111] This design greatly improves the mechanical support effect of the adjusting shaft 300 on the cleaning shaft 200 , and greatly reduces the impact of the notch 220 on the overall mechanical strength of the cleaning shaft 200 .

[0112] Specifically, a second matching groove 240 is further defined on the bottom wall of the first matching groove 230 . The second matching groove 240 extends along the extending direction of the first matching groove 230 . The second matching groove 240 has the same length as the first matching groove 230 .

[0113] Please combine Figure 12 The outer wall of the cleaning shaft 200 is also provided with a receiving groove 250, which is arranged corresponding to the second matching groove 240, and the receiving groove 250 also extends along the extension direction of the second matching groove 240. Both ends of the cleaning shaft 200 are provided with a receiving groove 250, and the receiving groove 250 is located inside the end cover 500.

[0114] The accommodating groove 250 contains a moving block 251, and a plurality of moving blocks 251 are sequentially distributed along the extending direction of the accommodating groove 250 and completely fill the accommodating groove 250. Figure 13 and Figure 14 Each moving block 251 is fixedly connected to a push rod 252, which is arranged along the radial direction of the cleaning shaft 200 and extends into the second mating groove 240. The push rod 252 is equipped with an elastic member 253, so that the moving block 251 is naturally accommodated within the receiving groove 250. In this state, the moving block 251 is flush with the outer wall of the cleaning rod, that is, these moving members can be regarded as just filling the receiving groove 250. Under the action of the elastic member 253, the push rod 252 of all moving blocks 251 extends into the second mating groove 240, and these push rods 252 are sequentially spaced along the extension direction of the second mating groove 240.

[0115] Please combine Figure 15 and Figure 16 A second protrusion 350 for cooperating with the second cooperating groove 240 is also provided on the side surface of the first protrusion 340 away from the adjusting shaft 300. Second protrusions 350 are provided at both ends of the adjusting shaft 300, and the second protrusions 350 extend along the extension direction of the first protrusion 340.

[0116] The second protrusion 350 satisfies the following conditions: (1) during the movement of the mating block 320 along the cleaning shaft 200 into the end cover 500, when the mating block 320 has just blocked the flow space between the extension tube 110 and the filter cartridge 100, that is, when the cross section S1 corresponding to the mating block 320 has just moved into the extension tube 110, the second protrusion 350 has not moved to the top rod 252, and at this time the moving block 251 is still accommodated in the accommodating groove 250. (2) When the matching block 320 continues to move along the cleaning shaft 200 into the end cover 500, when the flow space between the extension tube 110 and the filter cartridge 100 is about to be opened, that is, when the cross section S2 corresponding to the matching block 320 is still located in the extension tube 110 and the cross section S2 is about to enter the end cover 500 from the extension tube 110, the second protrusion 350 moves to the push rod 252 and pushes all the push rods 252 toward the side where the receiving groove 250 is located, so that the moving block 251 partially extends from the receiving groove 250 to form a spiral rib 260, as shown in FIG. Figure 17 and Figure 18 shown.

[0117] The ribs 260 can be considered as another form of spiral blades, which facilitates the impurities in the end cover 500 to fully enter the second channel 700 .

[0118] During the filtering process and the process of the matching block 320 squeezing impurities in the end cover 500, the moving block 251 is stored in the receiving groove 250 (that is, the rib 260 is in the retracted state). On the one hand, it can prevent excessive impurities from adhering to the moving block 251 and affecting the sufficient discharge of impurities in the end cover 500. On the other hand, it can prevent the moving block 251 from being deformed due to excessive pressure during the squeezing process.

[0119] To ensure that impurities within the end cap 500 can be fully discharged, the end of the first channel 600 away from the end cap 500 is sealed by a second sealing plate 610. An inlet pipe 620 for introducing wastewater to be filtered is provided on the sidewall of the end of the first channel 600 near the end cap 500. In this embodiment, the inlet pipe 620 is provided with a control valve for controlling its opening and closing.

[0120] Please combine Figure 3 and Figure 19 The first channel 600 contains a push block 630 , and along the axial direction of the first channel 600 , the push block 630 slides in the first channel 600 , and the push block 630 adheres to the inner wall of the first channel 600 and slides and seals.

[0121] One end of the push block 630 away from the end cover 500 is fixedly connected to a push arm, which passes through the second sealing plate 610 and cooperates with a push mechanism (not shown in the figure) for driving the push block 630 to move.

[0122] A first groove 631 and a second groove 632 are formed on a surface of the push block 630 on a side close to the end cover 500. Both the first groove 631 and the second groove 632 extend axially along the cleaning shaft 200. The second groove 632 is located on a side of the first groove 631 away from the filter cartridge 100. The second groove 632 extends through the end of the first groove 631 away from the filter cartridge 100. The first groove 631 extends through the side wall of the push block 630 close to the filter cartridge 100, and the second groove 632 extends through the side wall of the push block 630 away from the filter cartridge 100.

[0123] The cross sections of the first groove 631 and the second groove 632 are both semicircular, and the cylinders corresponding to the groove walls of the two grooves are coaxially arranged.

[0124] The diameter of the cylinder corresponding to the groove wall of the groove cavity of the first groove 631 is the same as the inner diameter of the filter cartridge 100 .

[0125] The diameter of the cylinder corresponding to the groove wall of the groove cavity of the second groove 632 = the outer diameter of the cleaning shaft 200 + the protruding height of the moving block 251 when it protrudes from the accommodating groove 250 * 2.

[0126] Through the above design, when the impurities in the end cover 500 begin to be discharged, when the switch mechanism of the second channel 700 is opened, the switch mechanism of the first channel 600 can be opened synchronously, and the control valve of the input pipe 620 can be controlled to be closed. Figure 20 At this time, the push block 630 is driven into the end cover 500, and the push block 630 can be used to fully push out the impurities in the end cover 500.

[0127] When the push block 630 is pushed, the end point of the movement of the push block 630 is that the bottom wall of the first groove 631 is in contact with the side surface of the matching block 320 away from the cleaning shaft 200. At this time, the side surface of the rib 260 away from the cleaning shaft 200 (the side surface of the moving block 251 away from the cleaning shaft 200) can be in contact with the bottom wall of the second groove 632. Figure 18 and Figure 21 shown.

[0128] When the fitting block 320 is controlled to move further into the end cover 500 , the end point of the fitting block 320 is when the end of the fitting block 320 is in contact with the end wall of the first groove 631 away from the filter cartridge 100 .

[0129] With this design, the bottom wall and end wall of the first groove 631 can be cleaned with the help of the matching block 320, and the side wall of the second groove 632 can be cleaned with the rib 260, ensuring that the push block 630 will not adhere to impurities after pushing the impurities.

[0130] To sum up, the self-cleaning wastewater treatment system provided by the embodiment of the present invention can realize self-cleaning of the filter plate while filtering, without stopping for cleaning. While ensuring the filtering effect, it effectively reduces the impact on the filtration volume per unit time. The number of equipment required to achieve the same filtration volume per unit time is less, which helps to reduce equipment configuration costs.

[0131] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A self-cleaning wastewater treatment system, characterized in that: include: filter cartridge, cleaning shaft, adjusting shaft, sleeve, end cover, first channel and second channel; The filter cartridge is cylindrical and has filter holes. Both ends of the filter cartridge are coaxially fixedly connected to an extension tube. The inner diameter of the extension tube is the same as that of the filter cartridge. The end cover is provided on the end of the extension tube away from the filter cartridge to seal it. The cleaning shaft is arranged in the filter cartridge and coaxially with the filter cartridge, both ends of the cleaning shaft pass through the end cover, and the cleaning shaft is rotatably matched with the end cover and is rotationally sealed with the end cover; A spiral conveying blade is fixedly connected to the outer wall of the cleaning shaft. The spiral conveying blade is located in the filter cartridge and is continuously wound along the axial direction of the cleaning shaft. Both ends of the spiral conveying blade extend into the end cover. The inner side walls of both the filter cartridge and the extension tube are in contact with the spiral conveying blade. The cleaning shaft is tubular, and a notch is formed on the side wall of the cleaning shaft to penetrate the cleaning shaft. The notch is located between two adjacent spiral turns of the spiral conveying blade. The notch extends in a spiral shape along the spiral extension direction of the spiral conveying blade, and both ends of the notch extend to the two ends of the spiral conveying blade respectively. The adjusting shaft is rotatably fitted in the cleaning shaft, and a rotational seal is formed between the adjusting shaft and the cleaning shaft; the adjusting shaft has a connecting block and a matching block; the matching block is located between two adjacent spiral turns of the spiral conveying blade, and the matching block continuously extends in a spiral shape along the spiral direction of the spiral conveying blade, and the number of spiral turns corresponding to the matching block is greater than or equal to 1 turn; Both side walls of the matching block are in contact with and slide-sealed against two adjacent spiral turns of the spiral conveying blade; the side surface of the matching block away from the cleaning shaft is in contact with and slide-sealed against the inner side wall of the filter cartridge; and the side surface of the matching block close to the cleaning shaft is in contact with and slide-sealed against the outer side wall of the cleaning shaft; The connecting block is located in the notch; along the spiral direction of the notch, the connecting block can be slidably fitted into the notch; the fitting block and the adjusting shaft are fixedly connected by the connecting block; Both ends of the sleeve are closed by a first sealing plate, the filter cartridge is arranged inside the sleeve, and the extension tubes located at both ends of the filter cartridge respectively penetrate the first sealing plates at both ends of the sleeve, and the extension tubes and the first sealing plates are fixedly sealed. The top of each end cover is connected to the first channel, which is used to input wastewater to be filtered; the bottom of each end cover is connected to the second channel, which is used to collect filtered impurities; the connection between the first channel and the end cover, and between the second channel and the end cover are controlled by a switch mechanism.

2. The self-cleaning wastewater treatment system according to claim 1, characterized in that: The cleaning shaft is driven by a first driver, and the adjusting shaft is driven by a second driver; the self-cleaning wastewater treatment system also includes: a controller; the controller is used to control the first driver and the second driver to control the relative size relationship between the rotational speeds of the cleaning shaft and the adjusting shaft, thereby adjusting the position of the mating block on the cleaning shaft.

3. The self-cleaning wastewater treatment system according to claim 2, characterized in that: Both ends of the adjusting shaft extend beyond the cleaning shaft, and the length of the adjusting shaft is greater than twice the length of the cleaning shaft; The adjusting shaft sleeve is provided with a driving sleeve, and the driving sleeve is located outside the cleaning shaft; along the circumference of the adjusting shaft, the driving sleeve is fixedly matched with the adjusting shaft; along the axial direction of the adjusting shaft, the driving sleeve is slidingly matched with the adjusting shaft; the driving sleeve is driven by the second driver.

4. The self-cleaning wastewater treatment system according to claim 1, characterized in that: The connecting block also extends into a spiral shape along the spiral direction of the notch; along the spiral direction of the spiral conveying blade, the length of the connecting block is the same as the length of the matching block, and the end faces of both ends of the connecting block are respectively flush with the end faces of both ends of the matching block.

5. The self-cleaning wastewater treatment system according to claim 1, characterized in that: The outer side wall of the adjusting shaft is in contact with the inner side wall of the cleaning shaft and is rotatably sealed.

6. The self-cleaning wastewater treatment system according to claim 1, characterized in that: The inner side wall of the cleaning shaft is provided with a first matching groove, the first matching groove being located between two adjacent spiral turns of the notch, the first matching groove also continuously extending in a spiral shape along the spiral direction of the spiral conveying blade, and the two ends of the first matching groove respectively extending to the two end surfaces of the cleaning shaft; The outer side wall of the adjustment shaft is provided with a first protrusion for cooperating with the first cooperating groove. The first protrusion also extends continuously into a spiral shape along the spiral direction of the spiral conveying blade. The two ends of the first protrusion extend to the end faces of the adjustment shaft respectively.

7. The self-cleaning wastewater treatment system according to claim 6, characterized in that: The bottom wall of the first matching groove is further provided with a second matching groove, the second matching groove extends along the extension direction of the first matching groove, and the second matching groove has the same length as the first matching groove; The outer side wall of the cleaning shaft is further provided with a receiving groove, the receiving groove is arranged corresponding to the second matching groove, and the receiving groove also extends along the extension direction of the second matching groove. Both ends of the cleaning shaft are provided with the receiving groove, and the receiving groove is located inside the end cover; The receiving groove contains a motion block, and a plurality of the motion blocks are sequentially distributed along the extension direction of the receiving groove and completely fill the receiving groove. Each of the motion blocks is fixedly connected to a push rod, and the push rod is arranged along the radial direction of the cleaning shaft and penetrates into the second matching groove; the push rod is equipped with an elastic member so that the motion block is accommodated in the receiving groove in a natural state; A second protrusion for mating with the second mating groove is further provided on a side surface of the first protrusion away from the adjustment shaft. The second protrusion is provided at both ends of the adjustment shaft, and extends along the extension direction of the first protrusion. The second protrusion is constructed as follows: in the process of the mating block moving along the cleaning axis into the end cover, when the mating block has just blocked the flow space between the extension tube and the filter cartridge, the second protrusion has not moved to the push rod; in the process of the mating block continuing to move along the cleaning axis into the end cover, when the flow space between the extension tube and the filter cartridge is about to be opened, the second protrusion moves to the push rod and pushes all the push rods toward the side where the accommodating groove is located, so that the moving blocks are partially extended from the accommodating groove to form a spiral rib.

8. The self-cleaning wastewater treatment system according to claim 7, characterized in that: An end of the first channel away from the end shield is closed by a second sealing plate, and an input pipe for introducing wastewater to be filtered is provided on a side wall of an end of the first channel close to the end shield; A push block is disposed in the first channel. The push block is slidably fitted in the first channel along the axial direction of the first channel. The push block adheres to the inner wall of the first channel and forms a sliding seal. A first groove and a second groove are formed on a surface of the push block on one side close to the end cover. Both the first groove and the second groove extend along the axial direction of the cleaning shaft. The second groove is located on a side of the first groove away from the filter cartridge. The second groove extends to the end wall of the first groove away from the filter cartridge. The cross-sections of the groove cavities of the first groove and the second groove are both semicircular, and the cylinders corresponding to the groove walls of the two groove cavities are coaxially arranged. The diameter of the cylinder corresponding to the groove wall of the groove cavity of the first groove is the same as the inner diameter of the filter cartridge, and the diameter of the cylinder corresponding to the groove wall of the groove cavity of the second groove is equal to: the outer diameter of the cleaning shaft + the protruding height of the moving block when it protrudes from the accommodating groove * 2.

9. The self-cleaning wastewater treatment system according to claim 1, characterized in that: The switch mechanism includes: a partition and a driving assembly for driving the partition; In the first channel, the partition is arranged perpendicular to the axial direction of the first channel, the partition passes through the side wall of the first channel and is slidably fitted in the first channel, and a sliding seal is formed between the partition and the side wall of the first channel; In the second channel, the partition is arranged perpendicular to the axial direction of the second channel, passes through the side wall of the second channel and is slidably fitted in the second channel, and a sliding seal is formed between the partition and the side wall of the second channel.

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