Sewage filter capable of automatically replacing filter screen

Abstract

The invention discloses a sewage filter capable of automatically replacing a filter screen, and relates to the technical field of sewage filters, the sewage filter comprises a purification tank, a filter chamber is installed in the purification tank, the middle part of the filter chamber is fixedly connected with a filter cartridge, and the inner wall of the purification tank is fixedly connected with a sewage pipe. When the first filter plate is used for a long time and the first filter plate and the second filter plate are blocked, the impact force for flushing the surface of the first filter plate through the bevel water outlet groove is increased due to the blockage of the filter holes, and the impact force is reduced due to the special design of the inclination angle of the water filter groove. The water flow scouring resistance can promote the whole mechanism rotating disc to rotate clockwise around the axis filter cylinder with the rotating disc as the core, at the moment, the extrusion effect between the water blocking plate and the cambered surface extrusion block becomes initial power for rotation, and along with aggravation of the blocking condition of the first filter plate and the second filter plate, the rotation resistance is correspondingly increased; and finally, the turntable which is circumferentially mounted together with the first filter plate is driven to start to rotate.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage filters, and particularly to a sewage filter with an automatically replaceable filter screen. Background Art

[0002] In a Chinese patent with the patent publication number CN212347920U, a filter for automatically replacing a filter plate is disclosed, which includes a filter housing. An inlet and an outlet are provided on the housing. Isolation plates are provided on both the upper and lower sides inside the housing. A guiding channel is provided opposite to the two isolation plates. A first filter plate is slidably arranged in the guiding channel. The first filter plate and the isolation plates divide the housing into a turbid liquid chamber and a clear liquid chamber. A first filter plate channel is provided on the housing connected to the isolation plate. The two ends of the first filter plate pass through the first filter plate channel and are respectively wound around a drum. The drum is rotatably arranged on a base. At least one drum is driven by a motor. This filter can realize the movement of the first filter plate by driving the rotation of the drum by the motor. The clean first filter plate enters from one first filter plate channel, and the dirty first filter plate exits from the other first filter plate channel, realizing the automatic replacement of the first filter plate, improving the replacement efficiency of the first filter plate, and keeping the first filter plate unobstructed, effectively improving the filtration efficiency.

[0003] However, there are still the following defects in the specific use of the comparative document:

[0004] 1. The scheme in the comparative document uses a motor to directly drive the first filter plate for automatic replacement. However, in actual applications, the first filter plate is usually installed in an area with a relatively complex sewage environment, which makes it difficult for manual workers to judge whether the first filter plate is overly dirty based on experience alone. At the same time, since the sewage may contain solid impurities and the sewage has a certain flow rate during flushing, long-term flushing will cause the first filter plate to be damaged. In such a complex use environment, the operator can only observe the degree of dirt pollution on the surface of the first filter plate and cannot accurately judge whether the first filter plate is damaged. Therefore, it is impossible to only control the motor by the operator to wind up the first filter plate. This semi-automatic control method relying on manual labor is limited in use in special environments, resulting in limitations in use.

[0005] 2. In addition, the comparative document uses a motor as the driving device. When the first filter plate is used in a small special environment and is driven solely by the motor as its driving source, since the working environment of the sewage filter is usually relatively harsh, there are problems such as corrosion and wear. This not only affects the use of the motor itself, but also using an external driving device for driving not only poses a test to the power system but also increases its use cost and at the same time increases the maintenance cost of equipment damage.

[0006] Therefore, a sewage filter with an automatically replaceable filter screen is proposed to solve the above problems. Summary of the Invention

[0007] In view of this, the technical problem to be solved by the present invention is to provide a sewage filter with an automatic filter screen replacement mechanism to solve the problems of high cost of sewage treatment equipment and the limitation of the use environment due to manual operation in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solution: A sewage filter with an automatic filter screen replacement mechanism, including a purification tank, a filtration chamber is installed in the purification tank, a filter cylinder is fixedly connected to the middle of the filtration chamber, a sewage pipe is fixedly connected to the inner wall of the purification tank, and further includes a buffer vibration decontamination mechanism and an automatic replacement mechanism. The buffer vibration decontamination mechanism is arranged in the middle of the filtration chamber, and the automatic replacement mechanism is arranged on the inner wall of the purification tank;

[0009] The buffer vibration decontamination mechanism is used for impurity separation and buffering during sewage filtration;

[0010] The automatic replacement mechanism is used for automatic replacement and positioning of the first filter plate.

[0011] Preferably, the buffer vibration decontamination mechanism includes a support plate, a filter water tank is fixedly connected above the support plate, a first filter plate is slidably connected in the inner wall of the filter water tank, and shock-absorbing springs are symmetrically and fixedly connected around the bottom of the first filter plate.

[0012] Preferably, the end of the shock-absorbing spring away from the first filter plate is fixedly connected to a second filter plate, the second filter plate is fixedly connected to the bottom of the filter water tank, and an inclined outlet water tank is fixedly connected and communicated above the middle of the first filter plate of the sewage pipe.

[0013] Preferably, the support plate to the second filter plate are arranged in a circumferential array in the filtration chamber.

[0014] Preferably, the automatic replacement mechanism includes a water blocking plate, a turntable is fixedly connected to the bottom of the water blocking plate, the side of the turntable away from the water blocking plate is rotatably connected to the bottom of the filtration chamber, and baffles are symmetrically and fixedly connected to the water blocking plate.

[0015] Preferably, the water blocking plates are arranged in a circumferential array on the upper surface of the turntable, the bottom of the support plate is fixedly connected to the turntable, a pressing column is slidably connected to the inner wall of the filtration chamber, and a fixing block is slidably connected to the outer surface of the middle of the pressing column.

[0016] Preferably, the bottom of the fixing block is fixedly connected to the bottom of the filtration chamber, a buffer spring is sleeved on the outer surface of the end of the pressing column away from the arc-shaped pressing block, one end of the buffer spring is fixedly connected to the outer surface of the filtration chamber, and the other end of the buffer spring is fixedly connected to the pressing column.

[0017] Preferably, the bottom of the support plate is uniformly fixedly connected to the turntable, and the outer surface of the filter cylinder is rotatably connected to the middle of the turntable.

[0018] Compared with the prior art, a sewage filter with an automatic filter screen replacement provided by the present invention has the following beneficial effects:

[0019] 1. With the inclination angle setting of the inclined outlet trough and the filter trough in the present invention, when the first filter plate is used for a long time, the first filter plate and the second filter plate are blocked due to the filtration of impurities. At this time, since a scouring angle is formed between the inclined outlet trough and the filter trough, when the first filter plate and the second filter plate are blocked, the impact force scouring the surface of the first filter plate through the inclined outlet trough increases due to the blockage of the filter holes. At this time, due to the special design of the inclination angle of the filter trough, the water flow scouring resistance will cause the entire mechanism to start rotating clockwise around the central filter cylinder with the turntable as the core. At this time, the extrusion effect between the water blocking plate and the arc-shaped extrusion block becomes the initial driving force of the rotation. As the blockage of the first filter plate and the second filter plate intensifies, the rotation resistance also increases accordingly, and finally the turntable installed circumferentially with the first filter plate starts to rotate.

[0020] 2. The design of installing the first filter plate circumferentially on the turntable enables, whenever a first filter plate becomes unable to effectively filter due to blockage, through the further extrusion effect of the extrusion column and the arc-shaped extrusion block, and the precise cooperation of the buffer spring and the baffle, to automatically rotate the next unblocked first filter plate to the optimal filtering position below the inclined outlet trough. This automatic replacement process not only ensures the continuity and high efficiency of sewage treatment, but also greatly extends the service life of the entire device.

[0021] 3. When the new first filter plate is in place and starts to work, since the filter holes are unobstructed, the scouring resistance between the water flow and the surface of the first filter plate is significantly reduced. This change makes the force that originally drove the turntable to rotate no longer sufficient to overcome the existing resistance. Therefore, the turntable stops rotating and stays at the position of the new first filter plate until this first filter plate also needs to be replaced. In this way, the cycle repeats, achieving the automatic replacement of the first filter plate and the continuous and efficient sewage treatment.

[0022] 4. With the inclined outlet trough, filter trough, and first filter plate arranged as such, when sewage flushes onto the surface of the first filter plate from the inclined outlet trough at a certain flow rate, through the preliminary filtration effect on the surface of the first filter plate, since the sewage with a certain flow rate will generate a certain impact force when flushing onto the surface of the first filter plate, the present invention ingeniously utilizes the principle of hydrodynamics. The sewage with a specific flow rate is introduced from the inlet inclined outlet trough and directly flushes onto the surface of the first filter plate of the first layer of the filter plate. Through this design, not only the natural flow rate of the sewage is utilized, but also the carefully arranged impact force enhances the preliminary filtration effect. Moreover, by installing a buffer structure, a shock-absorbing spring, at the bottom of the first filter plate, this design ingeniously alleviates the impact on the surface of the first filter plate caused by the direct flushing of the sewage, effectively extending the service life of the filter plate and reducing the damage that may be caused by long-term flushing.

[0023] In addition, the innovation point in the design of the present invention is that when the sewage flushes onto the surface of the first filter plate, due to the elastic action of the shock-absorbing spring, the first filter plate will generate a certain movement displacement. When the filter holes on the surface of the first filter plate are blocked by dirt in the sewage, when the sewage continuously flushes the surface of the first filter plate and generates a certain reciprocating sliding, at this time, due to the dirt being blocked in the filter holes, and because the first filter plate generates a certain shaking under the action of the shock-absorbing spring, at this time, due to the self-gravity of the dirt, when the dirt vibrates in the filter holes of the first filter plate, the dirt blocked in the filter holes will fall off under the vibration of the first filter plate. Through the setting of the present invention, when the sewage flushes onto the surface of the first filter plate, it can not only reduce the damage of the first filter plate caused by the long-term impact of solid impurities, but also, through the setting of the first filter plate and the shock-absorbing spring, can reduce the blockage of the filter holes by dirt to a certain extent, thereby reducing the blockage of the filter holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structure schematic diagram of the present invention;

[0025] Figure 2 is an auxiliary three-dimensional structure schematic diagram of the present invention;

[0026] Figure 3 is a semi-sectional three-dimensional structure schematic diagram of the present invention;

[0027] Figure 4 is a schematic diagram of the structural connection relationship of the automatic replacement mechanism of the present invention;

[0028] Figure 5 For the present invention Figure 4 enlarged view at A;

[0029] Figure 6 is a schematic diagram of the structural connection relationship of the automatic replacement mechanism of the present invention;

[0030] Figure 7 For the present inventionFigure 6 Enlarged view at position B in the figure.

[0031] In the figure:

[0032] 1. Purification tank; 11. Filtration chamber; 12. Sewage pipe; 13. Filter cartridge;

[0033] 2. Buffer vibration decontamination mechanism; 21. Support plate; 22. Filter water tank; 23. First filter plate; 24. Buffer spring; 25. Second filter plate; 26. Inclined outlet water tank;

[0034] 3. Automatic replacement mechanism; 31. Water blocking plate; 32. Turntable; 33. Extrusion column; 34. Fixed block; 35. Buffer spring; 36. Baffle; 37. Arc-shaped extrusion block. Specific implementation mode

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] The present invention will be further described in detail below according to the drawings and embodiments.

[0037] Embodiment

[0038] Please refer to Figures 1 to 7 as shown in

[0039] To solve the problems mentioned in the technical solution, the embodiment of the present application provides a sewage filter for automatically replacing the filter screen, including a purification tank 1, a filtration chamber 11 is installed in the purification tank 1, a filter cartridge 13 is fixedly connected to the middle of the filtration chamber 11, a sewage pipe 12 is fixedly connected to the inner wall of the purification tank 1, and further includes a buffer vibration decontamination mechanism 2 and an automatic replacement mechanism 3. The buffer vibration decontamination mechanism 2 is arranged in the middle of the filtration chamber 11, and the automatic replacement mechanism 3 is arranged on the inner wall of the purification tank 1;

[0040] The buffer vibration decontamination mechanism 2 is used for impurity separation and buffering during sewage filtration;

[0041] The automatic replacement mechanism 3 is used for the automatic replacement and positioning of the first filter plate 23;

[0042] The buffer vibration decontamination mechanism 2 includes a support plate 21, a filter water tank 22 is fixedly connected above the support plate 21, a first filter plate 23 is slidably connected to the inner wall of the filter water tank 22, and shock-absorbing springs 24 are symmetrically and fixedly connected to the four sides of the bottom of the first filter plate 23;

[0043] One end of the shock-absorbing spring 24 away from the first filter plate 23 is fixedly connected to a second filter plate 25, and the second filter plate 25 is fixedly connected to the bottom of the water filter tank 22. The sewage pipe 12 is fixedly communicated with an inclined outlet water tank 26 above the first filter plate 23.

[0044] Among them: the support plate 21 to the second filter plate 25 are arranged in a circle in the filtration chamber 11, and the bottom of the water filter tank 22 is fixedly arranged at an inclined angle with the support plate 21.

[0045] Compared with the comparative document, through the implementation of this embodiment, the device adopts a double-layer filter plate structure. That is, the sliding design of the first filter plate 23 in the shock-absorbing spring 24 not only realizes dynamic filtration but also further improves the filtration efficiency. The setting of the double-layer first filter plate 23 can, on the one hand, intercept impurities in sewage more meticulously and improve the filtration effect; on the other hand, by dispersing the impact of water flow on a single first filter plate 23, the overall durability of the first filter plate 23 is also indirectly enhanced.

[0046] For further embodiments, please refer to Figures 1 to 7 as shown:

[0047] The automatic replacement mechanism 3 includes a water blocking plate 31. The bottom of the water blocking plate 31 is fixedly connected to a turntable 32. One side of the turntable 32 away from the water blocking plate 31 is rotatably connected to the bottom of the filtration chamber 11. Symmetrically fixed connections of baffles 36 are provided on the water blocking plate 31.

[0048] The water blocking plate 31 is arranged in a circle on the upper surface of the turntable 32. An arc-shaped extrusion block 37 is fixedly connected to the outer circumference of the turntable 32. An extrusion column 33 is slidably connected to the inner wall of the filtration chamber 11. A fixing block 34 is slidably connected to the outer surface of the middle part of the extrusion column 33.

[0049] The bottom of the fixing block 34 is fixedly connected to the bottom of the filtration chamber 11. A buffer spring 35 is sleeved on the outer surface of one end of the extrusion column 33 away from the arc-shaped extrusion block 37. One end of the buffer spring 35 is fixedly connected to the outer surface of the filtration chamber 11, and the other end of the buffer spring 35 is fixedly connected to the extrusion column 33.

[0050] Among them: the bottom of the support plate 21 is uniformly fixedly connected to the turntable 32, and the outer surface of the filter cylinder 13 is rotatably connected to the middle of the turntable 32.

[0051] Compared with the comparative document and the prior art, through the implementation of this embodiment and the setting of the present invention, the first filter plate 23 is automatically replaced under the resistance of sewage by the first filter plate 23. It can not only achieve automatic replacement without the supervision of operators but also, by adopting the inclined structure setting of the first filter plate 23 and the inclined outlet water tank 26, not only reduces the use of its external drive source but also reduces energy consumption.

[0052] The working principle of all the contents in the above embodiments is as follows:

[0053] In the initial state: no sewage flows through the sewage pipe 12, and the buffer spring 35 is not compressed.

[0054] The following is the working process of the buffer vibration decontamination mechanism 2 for impurity separation and buffering during sewage filtration:

[0055] During use, first, it is communicated with an external water inlet pipe through the sewage pipe 12. At this time, sewage will flow into the first filter plate 23 along the guide of the inclined outlet trough 26 at a certain flow rate. At this time, the first filter plate 23 begins to slide downward along the inner wall of the filter water trough 22 under the impact resistance of the sewage. Since the shock-absorbing springs 24 are fixedly connected to the periphery of the bottom of the first filter plate 23, and one end of the shock-absorbing spring 24 far from the first filter plate 23 is fixedly connected to the second filter plate 25. At this time, when the first filter plate 23 slides downward, when the sewage flushes onto the surface of the first filter plate 23 from the inclined outlet trough 26 at a certain flow rate, at this time, under the preliminary filtering effect of the surface of the first filter plate 23, because the sewage with a certain flow rate will generate a certain impact force when flushing onto the surface of the first filter plate 23, the present invention utilizes the principle of water flow dynamics, and the sewage with a specific flow rate is introduced from the inlet inclined outlet trough 26 and directly flushes onto the surface of the first filter plate 23. Through this design, not only the natural flow rate of the sewage is utilized, but also the preliminary filtering effect is enhanced through the carefully arranged impact force. And by installing a buffer structure, the shock-absorbing spring 24, at the bottom of the first filter plate 23, this design cleverly alleviates the impact caused by the direct flushing of the sewage on the surface of the first filter plate 23, effectively prolongs the service life of the filter plate, and reduces the damage that may be caused by long-term flushing. At the same time, the innovation point in the present invention is that when the sewage flushes onto the surface of the first filter plate 23, due to the elastic action of the shock-absorbing spring 24, the first filter plate 23 will generate a certain movement displacement. And when the filter holes on the surface of the first filter plate 23 are blocked by dirt in the sewage, when the sewage continuously flushes the surface of the first filter plate 23 and generates a certain reciprocating sliding, at this time, because the dirt is blocked in the filter holes, and because the first filter plate 23 generates a certain shaking under the action of the shock-absorbing spring 24, at this time, due to the self-gravity of the dirt, when the dirt vibrates in the filter holes of the first filter plate 23, the dirt blocked in the filter holes will fall off under the vibration of the first filter plate 23. Through the setting of the present invention, when the sewage flushes onto the surface of the first filter plate 23, it can not only reduce the damage of the first filter plate 23 caused by the long-term impact of solid impurities, but also can reduce the blockage of dirt in the filter holes to a certain extent through the setting of the first filter plate 23 and the shock-absorbing spring 24, thereby reducing the blockage of the filter holes.

[0056] Please refer to the above working process Figures 1 to 7 。

[0057] The following is the working process of the automatic replacement mechanism 3 for the automatic replacement and positioning of the first filter plate 23:

[0058] As described above, when the first filter plate 23 is used for a long time, the first filter plate 23 and the second filter plate 25 are blocked due to the filtration of impurities. At this time, since a scouring angle is formed between the inclined outlet water groove 26 and the water filtering groove 22, when the first filter plate 23 and the second filter plate 25 are blocked, the impact force scouring the surface of the first filter plate 23 through the inclined outlet water groove 26 increases due to the blockage of the filter holes. At this time, due to the special design of the inclination angle of the water filtering groove 22, the water flow scouring resistance will cause the whole mechanism to start rotating clockwise around the central filter cylinder 13 with the turntable 32 as the core. At this time, the extrusion between the extrusion column 33 and the arc surface extrusion block 37 becomes the initial power of the rotation. As the blockage of the first filter plate 23 and the second filter plate 25 intensifies, the rotation resistance also increases accordingly, and finally the turntable 32 circumferentially installed with the first filter plate 23 starts to rotate.

[0059] The design of circumferentially installing the first filter plate 23 on the turntable 32 makes it so that whenever a first filter plate 23 cannot continue to effectively filter due to blockage, as Figure 7 shown, at this time, since the arc surface extrusion block 37 is fixedly connected to the outer periphery of the turntable 32 circumferentially, and the extrusion column 33 is slidably connected to the inner wall of the filtration chamber 11 near the arc surface extrusion block 37, when the turntable 32 rotates, it will drive the arc surface extrusion block 37 to start extruding the extrusion column 33. At this time, when the whole first filter plate 23 is completely blocked, the sewage scouring resistance will drive the turntable 32 to drive the arc surface extrusion block 37 to rotate until the convex points of the extrusion column 33 and the arc surface extrusion block 37 are mutually extruded. And at this time, under the action of the sewage scouring to the first filter plate 23, the turntable 32 will continue to rotate clockwise. At this time, since the inclined surfaces of the extrusion column 33 and the arc surface extrusion block 37 are no longer extruded, under the action of the sewage scouring to the first filter plate 23, when the first filter plate 23 drives the turntable 32 to rotate, it will drive the extrusion column 33 to drive the arc surface extrusion block 37 to start rotating again. Through the further extrusion between the extrusion column 33 and the arc surface extrusion block 37, as well as the precise cooperation of the buffer spring 35 and the baffle 36, the next unblocked first filter plate 23 can be automatically rotated to the best filtration position below the inclined outlet water groove 26. This automatic replacement process not only ensures the continuity and high efficiency of sewage treatment, but also greatly extends the service life of the whole device.

[0060] When the new first filter plate 23 is in place and starts to work, since the filter holes are unobstructed, the scouring resistance between the water flow and the surface of the first filter plate 23 is significantly reduced. This change makes the force that originally drove the turntable 32 to rotate no longer sufficient to overcome the existing resistance. Therefore, the turntable 32 stops rotating and remains at the position of the new first filter plate 23 until this first filter plate 23 also needs to be replaced, and so on in a cycle, realizing the automatic replacement of the first filter plate 23 and the continuous and efficient progress of sewage treatment. Compared with the use of a motor drive in the comparative document, with the setting of the present invention, the first filter plate 23 is automatically replaced under the resistance action of the sewage. Not only can the automatic replacement be realized without the supervision of an operator, but also by adopting the inclined structure setting of the first filter plate 23 and the inclined outlet trough 26, not only the use of its external drive source is reduced, but also the energy consumption is reduced.

[0061] Please refer to the above working process Figures 1 to 7 。

[0062] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0063] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sewage filter with an automatic filter screen replacement, used for automatically replacing a first filter plate (23), comprising a purification tank (1), a filter chamber (11) installed in the purification tank (1), a filter cartridge (13) fixedly connected to the middle of the filter chamber (11), and a sewage pipe (12) fixedly connected to the inner wall of the purification tank (1), characterized in that: It also includes a buffer vibration decontamination mechanism (2) and an automatic replacement mechanism (3), wherein the buffer vibration decontamination mechanism (2) is arranged in the middle of the filter chamber (11), and the automatic replacement mechanism (3) is arranged on the inner wall of the purification tank (1); The buffer vibration decontamination mechanism (2) is used for separating and buffering impurities during sewage filtration; The automatic replacement mechanism (3) is used for automatic replacement and positioning of the first filter plate (23).

2. The sewage filter with automatic filter screen replacement according to claim 1, characterized in that: The buffer vibration decontamination mechanism (2) comprises a support plate (21), a water filter trough (22) is fixedly connected to the top of the support plate (21), a first filter plate (23) is slidably connected to the inner wall of the water filter trough (22), and a shock absorbing spring (24) is symmetrically fixedly connected to the bottom of the first filter plate (23) around the periphery.

3. The sewage filter with automatic filter screen replacement according to claim 2, characterized in that: The damping spring (24) is fixedly connected to a second filter plate (25) at one end away from the first filter plate (23); the second filter plate (25) is fixedly connected to the bottom of the water filter tank (22); and the sewage pipe (12) is fixedly connected to an oblique outlet tank (26) near the middle of the first filter plate (23).

4. The sewage filter with automatic filter screen replacement according to claim 3 is characterized in that: The support plate (21) to the second filter plate (25) are arranged in a circular array in the filter chamber (11).

5. The sewage filter with automatic filter screen replacement according to claim 1, characterized in that: The automatic replacement mechanism (3) comprises a water blocking plate (31), a rotating disk (32) is fixedly connected to the bottom of the water blocking plate (31), the rotating disk (32) is rotatably connected to the bottom of the filter chamber (11) with one side away from the water blocking plate (31), and a baffle (36) is symmetrically fixedly connected to the water blocking plate (31).

6. The sewage filter with automatic filter screen replacement according to claim 5, characterized in that: The water blocking plates (31) are arranged in a circular array on the upper surface of the rotating disk (32); the bottom of the support plate (21) is fixedly connected to the rotating disk (32); an arc-surface extrusion block (37) is fixedly connected to the outer circumference of the rotating disk (32); an extrusion column (33) is slidably connected to the inner wall of the filter chamber (11); and a fixed block (34) is slidably connected to the outer surface of the middle part of the extrusion column (33).

7. The sewage filter with automatic filter screen replacement according to claim 6, characterized in that: The bottom of the fixed block (34) is fixedly connected to the bottom of the filter chamber (11); a buffer spring (35) is sleeved on the outer surface of one end of the extrusion column (33) away from the arc-surface extrusion block (37); one end of the buffer spring (35) is fixedly connected to the outer surface of the filter chamber (11); and the other end of the buffer spring (35) is fixedly connected to the extrusion column (33).

8. The sewage filter with automatic filter screen replacement according to claim 2, characterized in that: The bottom of the support plate (21) is evenly fixedly connected to the turntable (32), and the outer surface of the filter cartridge (13) is rotatably connected to the middle of the turntable (32).

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