Intelligent multi-stage sewage treatment system

Abstract

The application relates to the technical field of sewage treatment, in particular to an intelligent multistage sewage treatment system which comprises a supporting module, an aeration module and a gas conveying module. The aeration module comprises a plurality of aeration units which are sequentially connected in a head-to-tail mode, and each aeration unit comprises an eccentric sleeve, a base and an elastic diaphragm. The eccentric sleeve is coaxially and slidingly connected with the base, and the elastic diaphragm is arranged in the eccentric sleeve and can rotate relative to the eccentric sleeve. When the gas conveying module detects that the input gas pressure is too large, the elastic diaphragm can be periodically driven to rotate around its own axis, so that the elastic diaphragm rotates relative to the eccentric sleeve, the contact area between the elastic diaphragm and the eccentric sleeve is continuously changed, the stress position of the elastic diaphragm is periodically replaced, the local concentrated stress is uniformly distributed on the whole contact circumference of the elastic diaphragm, the elastic diaphragm breakage caused by long-term fixed-point wear is effectively avoided, and the overall service life of the elastic diaphragm is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to an intelligent multi-stage sewage treatment system. BACKGROUND

[0002] With the acceleration of industrialization and the improvement of urbanization level, the discharge of industrial wastewater and domestic sewage continues to grow, and water pollution problems are becoming increasingly prominent. Sewage treatment has become a key link to protect ecological environment safety and realize water resource recycling. At present, activated sludge method is one of the most widely used biological treatment technologies, which is widely used in municipal sewage and industrial wastewater treatment fields. As the "core power source" of biological treatment process, the main function of aeration system is to transport oxygen to sewage, provide sufficient dissolved oxygen for microbial degradation of organic pollutants, and play a role in mixing to prevent sludge sedimentation, which directly determines the treatment efficiency of sewage and the stability of effluent water quality.

[0003] The existing diaphragm aeration disc is usually composed of a base, a support plate and an elastic diaphragm (such as a rubber membrane or a silicone membrane). The edge of the diaphragm is tightly pressed on the base or support plate by a fixed ring, and a large number of micro-holes are opened on it. When compressed air is introduced, the diaphragm is inflated, the micro-holes are opened for aeration; when the gas supply is stopped, the diaphragm is attached under the action of hydrostatic pressure, the micro-holes are closed, and the backflow of sewage is effectively prevented.

[0004] However, during the aeration process, the gas pushes the diaphragm from the inside of the aeration disc to make it expand, at this time the fixed part of the edge of the diaphragm will be continuously stretched and deformed; since the fixed part cannot expand synchronously with the main body of the diaphragm, the stress level of this area is higher than that of the middle part of the diaphragm. During long-term operation, this local stress will accumulate, causing micro-cracks in the fixed part of the diaphragm, and eventually causing the diaphragm to break and leak as the cracks expand. This not only greatly shortens the service life of the diaphragm, increases the maintenance frequency and replacement cost of the equipment, but also affects the stability and continuity of the operation of the sewage treatment system. SUMMARY

[0005] Therefore, it is necessary to provide an intelligent multi-stage sewage treatment system in view of the problem that the fixed part of the diaphragm is easily damaged during long-time aeration of the existing equipment.

[0006] The above-mentioned purpose is achieved by the following technical solutions:

[0007] An intelligent multi-stage sewage treatment system, comprising: a support module, an aeration module and a gas delivery module;

[0008] The support module comprises a sewage pool, and the sewage pool is used for storing sewage;

[0009] The gas delivery module is used for delivering gas to the aeration module;

[0010] The aeration module comprises a plurality of aeration units connected in sequence, which are arranged in the sewage tank for aeration treatment of sewage.

[0011] The aeration unit comprises an eccentric sleeve, a base and an elastic diaphragm, the eccentric sleeve is coaxially and slidingly connected with the base, the elastic diaphragm is coaxially arranged in the eccentric sleeve, the eccentric sleeve and the elastic diaphragm are coaxially and slidingly connected, and the elastic diaphragm and the eccentric sleeve can rotate relative to each other; a circular through hole is formed in the eccentric sleeve, the center axis of the circular through hole does not coincide with the center axis of the eccentric sleeve; a plurality of first through holes for gas passing through are formed in the elastic diaphragm; when the gas delivery module delivers gas to the elastic diaphragm, the eccentric sleeve and the elastic diaphragm can slide along their own axes, and the middle part of the elastic diaphragm can expand along its own axis to open the first through holes.

[0012] When the gas delivery module detects that the input gas pressure is too large, the gas delivery module can periodically drive the elastic diaphragm to rotate around its own axis to change the relative contact area between the elastic diaphragm and the eccentric sleeve.

[0013] Further, the support module further comprises a guide rail fixed at the bottom of the sewage tank, the guide rail is connected in sequence to form an annular structure; the aeration unit further comprises a communication pipe, a first limiting half and a second limiting half, the first limiting half and the second limiting half are coaxially connected with the communication pipe, and the first limiting half and the second limiting half are detachably connected; the first limiting half, the second limiting half and the communication pipe are slidingly arranged in the guide rail, and all slide along the extension direction of the guide rail; a fixed column is fixedly arranged on the first limiting half, and the base is coaxially and threadedly connected with the fixed column.

[0014] Further, a limiting block is fixedly arranged in the guide rail, which is used to support the first limiting half, the second limiting half and the communication pipe.

[0015] Further, the aeration unit comprises a support disc, which is coaxially arranged between the base and the elastic diaphragm, the support disc and the base can slide relative to each other, and the support disc is coaxially and slidingly connected with the eccentric sleeve; the elastic diaphragm is coaxially connected with the support disc, a plurality of second through holes for gas passing through are formed in the support disc, and the second through holes are axially misaligned with the first through holes; when the gas delivery module delivers gas, the support disc can slide along its own axis, driving the elastic diaphragm to slide along its own axis.

[0016] Further, a first matching rod is fixedly arranged on the elastic diaphragm, a plurality of profiled teeth are fixedly arranged on the eccentric sleeve, and the plurality of profiled teeth are arranged in a circumferential direction around the central axis of the eccentric sleeve; when the elastic diaphragm rotates around its own axis, the first matching rod matches the profiled teeth, and drives the elastic diaphragm to rotate around its own axis.

[0017] Further, a limiting clamping block is fixedly arranged on the base, and the limiting clamping block is used for limiting the eccentric sleeve from rotating around its own axis.

[0018] Further, a second matching rod is fixedly arranged on the eccentric sleeve, a support plate is fixedly arranged on the guide rail at a straight section, a plurality of gear teeth are fixedly arranged on the support plate of the guide rail at the straight section, and the plurality of gear teeth are arranged in a radial direction of the eccentric sleeve; when the eccentric sleeve slides along its own axis, the second matching rod matches the gear teeth, and drives the communication pipe to slide along the extension direction of the guide rail.

[0019] Further, a scraper is coaxially arranged inside the eccentric sleeve, the scraper can slide along its own axis, and the scraper is arranged between the elastic diaphragm and the eccentric sleeve; the scraper is used for removing impurities on the surface of the elastic diaphragm.

[0020] Further, a sealing ring is coaxially arranged inside the eccentric sleeve, the sealing ring can slide along its own axis, and the sealing ring is arranged between the elastic diaphragm and the eccentric sleeve; the scraper is coaxially and slidably connected with the sealing ring, the scraper is arranged on the inner side of the sealing ring, the axial dimension of the sealing ring is greater than the axial dimension of the scraper, and the sealing ring is used for preventing sewage from flowing between the elastic diaphragm and the base.

[0021] Further, a spring is further included, one end of the spring is fixedly connected with the scraper, and the other end of the spring is fixedly connected with the eccentric sleeve; the spring is used for driving the scraper to reset.

[0022] The beneficial effects of the present application are:

[0023] This invention provides an intelligent multi-stage wastewater treatment system, comprising a support module, an aeration module, and an air supply module. The aeration module includes multiple aeration units connected sequentially end-to-end. Each aeration unit includes an eccentric sleeve, a base, and an elastic diaphragm. The eccentric sleeve and base are slidably connected coaxially, and the elastic diaphragm is disposed inside the eccentric sleeve and can rotate relative to it. Furthermore, the eccentric sleeve has a circular through-hole, the central axis of which does not coincide with the central axis of the eccentric sleeve; the elastic diaphragm has multiple first through-holes for gas passage. When the air supply module delivers gas to the elastic diaphragm, both the eccentric sleeve and the elastic diaphragm can slide along their own axial direction, and the middle part of the elastic diaphragm can expand along its own axial direction to open the first through-holes for wastewater aeration. When the gas delivery module detects excessive input gas pressure, it periodically drives the elastic diaphragm to rotate around its own axis, causing the elastic diaphragm and the eccentric sleeve to rotate relative to each other. This continuously changes the contact area between the elastic diaphragm and the eccentric sleeve, causing the stress points of the elastic diaphragm to rotate periodically. This distributes the localized concentrated stress evenly across the entire contact circumference of the elastic diaphragm, effectively preventing damage to the elastic diaphragm caused by long-term fixed-point wear, and thus extending the overall service life of the elastic diaphragm. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an intelligent multi-stage wastewater treatment system provided in an embodiment of the present invention;

[0025] Figure 2 for Figure 1 Top view;

[0026] Figure 3 for Figure 1 A schematic diagram of the structure of the hidden sewage tank;

[0027] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0028] Figure 5 for Figure 3 The front view;

[0029] Figure 6 for Figure 5 Cross-sectional view along section AA;

[0030] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle;

[0031] Figure 8 for Figure 5 Schematic diagram of the structure of the intermediate aeration unit;

[0032] Figure 9 for Figure 8 Side view;

[0033] Figure 10 is Figure 9 sectional view along B-B section;

[0034] Figure 11 is Figure 10 enlarged view of a portion at C;

[0035] Figure 12 is Figure 10 enlarged view of a portion at D;

[0036] Figure 13 is Figure 8 exploded view;

[0037] Figure 14 is Figure 13 enlarged view of a portion at E;

[0038] Figure 15 is Figure 13 enlarged view of a portion at F;

[0039] Figure 16 is Figure 13 enlarged view of a portion at G;

[0040] Figure 17 is Figure 5 schematic view of the structure of the guide rail;

[0041] Figure 18 is Figure 17 sectional view along C-C section;

[0042] Figure 19 is Figure 18 enlarged view of a portion at H;

[0043] Figure 20 is Figure 5 sectional view along D-D section;

[0044] Figure 21 is Figure 20 enlarged view of a portion at I.

[0045] wherein:

[0046] 100, sewage tank;

[0047] 201, air inlet hose; 211, first bellows; 212, second bellows;

[0048] 300, aeration unit; 301, limiting ring; 302, connecting plate; 311, eccentric sleeve; 312, support disc; 313, elastic diaphragm; 314, base; 315, communication pipe; 316, first limiting half ring; 317, second limiting half ring; 318, fixed column; 319, circular through hole; 321, first through hole; 322, second through hole; 341, first matching rod; 342, second matching rod; 351, first movable slot; 352, second movable slot; 361, profiled tooth; 362, gear tooth; 363, limiting clamping block; 371, sealing ring; 372, scraper; 373, spring;

[0049] 401, guide rail; 402, limiting block; 403, support plate. DETAILED DESCRIPTION

[0050] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0051] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0053] The following refers to Figures 1 to 21The intelligent multi-stage sewage treatment system comprises a support module, an aeration module and a gas conveying module. The support module comprises a sewage pool 100 for storing sewage, which serves as a mounting base for other components that can be directly or indirectly mounted in the sewage pool 100 to form a relatively integral whole after mounting. The gas conveying module comprises a gas inlet hose 201, a first corrugated pipe 211 and an external gas conveying system, and the aeration module comprises a plurality of aeration units 300 that are connected in series and arranged in a ring structure and are slidably arranged in the sewage pool 100. The gas inlet hose 201 is in communication with the first corrugated pipe 211, and the external gas conveying system inputs gas into the aeration units 300 through the gas inlet hose 201 and the first corrugated pipe 211.

[0054] The aeration unit 300 comprises an eccentric sleeve 311, a base 314, an elastic diaphragm 313 and a limiting ring 301. The eccentric sleeve 311 can be composed of two identical half-cylinders, each of which is fixedly provided with a connecting plate 302. The two half-cylinders are spliced and fixed by the limiting ring 301 to form a complete cylindrical structure, and the two connecting plates 302 abut each other. A circular through hole 319 is formed in the two connecting plates 302, the circular through hole 319 penetrates the two connecting plates 302, and the center axis of the circular through hole 319 does not coincide with the center axis of the eccentric sleeve 311. Further, the eccentric sleeve 311 is coaxially and slidably connected with the base 314, and the eccentric sleeve 311 can slide along its own axis. The elastic diaphragm 313 is coaxially arranged between the base 314 and the eccentric sleeve 311, and can slide and rotate relative to the base 314 and the eccentric sleeve 311. The elastic diaphragm 313 can slide along its own axis and rotate around its own axis. Further, a plurality of first through holes 321 for gas passing through are formed in the elastic diaphragm 313.

[0055] Specifically, when the external gas conveying system inputs gas into the aeration unit 300 through the gas inlet hose 201 and the first corrugated pipe 211, the gas passes through the base 314 to the elastic diaphragm 313. Under the action of gas pressure, the elastic diaphragm 313 slides upward along its own axis and slides relative to the base 314, i.e. Figure 10The gas pressure pushes the middle part of the elastic diaphragm 313 to expand and deform along its own axis, and the eccentric sleeve 311 is driven to slide upward and relative to the base 314. The expansion of the elastic diaphragm 313 opens the first through hole 321, and the gas forms bubbles through the first through hole 321 and enters the sewage, achieving the purpose of aeration. In this process, the expansion of the elastic diaphragm 313 will gradually pass through the circular through hole 319, causing the edge of the elastic diaphragm 313 to contact the inner wall of the connecting plate 302 and bear a large tensile stress, causing wear of the elastic diaphragm 313.

[0056] Further, when the external gas supply system detects that the gas pressure exceeds the preset value, the external gas supply system automatically starts the cycle mode of alternating aeration and gas extraction. By periodically introducing and extracting gas, the gas pressure is periodically adjusted. The periodic change in gas pressure drives the elastic diaphragm 313 to rotate around its own axis, causing the elastic diaphragm 313 to rotate relative to the eccentric sleeve 311, thereby constantly changing the contact area between the elastic diaphragm 313 and the connecting plate 302. When the elastic diaphragm 313 expands, the stress concentration is evenly distributed to the entire contact circumference of the elastic diaphragm 313, effectively preventing damage to the elastic diaphragm 313 caused by long-term point wear, thereby prolonging the overall service life of the elastic diaphragm 313.

[0057] In particular, when the eccentric sleeve 311 moves upward to the end of the stroke and stops, the elastic diaphragm 313 continues to expand axially due to continuous pressure, causing part of the elastic diaphragm 313 to have a tendency to adhere to the inner wall of the connecting plate 302, forming an effective dynamic sealing structure to prevent sewage from flowing into the space between the elastic diaphragm 313 and the base 314.

[0058] When the external gas supply system stops supplying gas, the gas pressure disappears, and the elastic diaphragm 313 returns to its original state due to its own elasticity and the action of water pressure, thereby closing the first through hole 321 and preventing sewage from flowing backward.

[0059] In one of the embodiments, the support module further comprises a guide rail 401 fixed at the bottom of the sewage tank 100, the guide rail 401 is connected end to end to form a ring structure, and the ring structure is the same as the ring structure formed by the plurality of aeration units 300. The aeration unit 300 further comprises a communication pipe 315, a first limiting half circle 316 and a second limiting half circle 317, the first limiting half circle 316 and the second limiting half circle 317 are coaxially connected with the communication pipe 315, and the first limiting half circle 316 and the second limiting half circle 317 are detachably connected. Further, adjacent communication pipes 315 are connected through the first corrugated pipe 211. The first limiting half circle 316, the second limiting half circle 317 and the communication pipe 315 are slidably arranged in the inside of the guide rail 401, and the first limiting half circle 316, the second limiting half circle 317 and the communication pipe 315 slide along the extension direction of the guide rail 401. The first limiting half circle 316 is fixedly provided with a fixed column 318, and the base 314 is coaxially threadedly connected with the fixed column 318.

[0060] Further, a limiting block 402 is fixedly arranged in the guide rail 401. Specifically, a plurality of groups of limiting blocks 402 are fixedly arranged in the inside of the straight section guide rail 401, the plurality of groups of limiting blocks 402 are circumferentially arranged around the axial direction of the communication pipe 315, effectively limiting the radial displacement of the first limiting half circle 316, the second limiting half circle 317 and the communication pipe 315 during the sliding process, preventing them from shaking or deviating during operation, and ensuring smooth movement; while in the curved section guide rail 401, the limiting block 402 is only arranged at the bottom of the guide rail 401, allowing the first limiting half circle 316, the second limiting half circle 317 and the communication pipe 315 to adjust the angle when turning, avoiding jamming.

[0061] In one of the embodiments, the aeration unit 300 further comprises a support disc 312. The support disc 312 is coaxially arranged between the elastic diaphragm 313 and the base 314, the support disc 312 can slide along its own axial direction and can rotate around its own axial direction, so that the support disc 312 can relatively slide and relatively rotate with respect to the base 314. The edge part of the elastic diaphragm 313 and the support disc 312 are made of hard material to ensure that the support disc 312 can push the elastic diaphragm 313 to slide synchronously. A plurality of second through holes 322 for gas passing through are formed in the support disc 312, and the second through holes 322 are axially offset from the first through holes 321.

[0062] In one of the embodiments, the elastic diaphragm 313 is fixedly provided with a first matching rod 341, and the eccentric sleeve 311 is fixedly provided with a plurality of profiled teeth 361, which are circumferentially arranged around the central axis of the eccentric sleeve 311. In particular, the right side of the profiled tooth 361 is a left-tilted inclined surface, i.e. Figure 14 the up-down and left-right directions in the above formula; the left side of the profiled tooth 361 is composed of a nearly vertical inclined surface and a right-tilted inclined surface, and the two are arranged at an angle.

[0063] Further, the outer side of the base 314 is provided with a first movable slot 351 extending along the axial direction of the base 314, and the inner side of the base 314 is provided with a second movable slot 352 extending along the axial direction of the base 314, and the axial size of the first movable slot 351 is smaller than that of the second movable slot 352. The eccentric sleeve 311 is slidably connected to the base 314 through the first movable slot 351, and the support disc 312 is slidably connected to the base 314 through the second movable slot 352.

[0064] Specifically, when the external gas supply system inputs gas through the air inlet hose 201 and the first corrugated pipe 211, the gas passes through the communication pipe 315 and the base 314 to the support disc 312. Under the action of gas pressure, the support disc 312 slides upward along the axial direction of the support disc 312, and the elastic diaphragm 313 is driven to slide upward synchronously, i.e. the up-down direction in the Figure 10 At the same time, the gas passes through the second through hole 322 to the elastic diaphragm 313, causing the middle part of the elastic diaphragm 313 to expand and deform along the axial direction of the elastic diaphragm 313, and the eccentric sleeve 311 is driven to slide upward synchronously and relative to the base 314; the expansion of the elastic diaphragm 313 causes the first through hole 321 to open, and the gas forms bubbles through the first through hole 321 to enter the sewage, achieving the purpose of aeration.

[0065] Because the axial size of the first movable slot 351 is smaller than that of the second movable slot 352, when the eccentric sleeve 311 rises to a certain height, its movement is limited and stops, but the elastic diaphragm 313 still has a tendency to further expand due to the continuous gas pressure, so that part of the elastic diaphragm 313 has a tendency to fit the inner wall of the connecting plate 302, forming an effective dynamic sealing structure to prevent sewage from flowing into the space between the elastic diaphragm 313 and the base 314.

[0066] When the external gas supply system detects that the gas pressure exceeds the preset value, the external gas supply system automatically starts the cycle mode of alternating aeration and air extraction. By periodically inputting and extracting gas, the gas pressure is periodically adjusted. In the aeration stage, the support disc 312, the elastic diaphragm 313 and the eccentric sleeve 311 all slide upward along the axial direction of the support disc 312, i.e. the up-down direction in the Figure 10 At the same time, the elastic diaphragm 313 expands. At this time, the first matching rod 341 slides upward along the right side of the special-shaped tooth 361, i.e. the up-down and left-right directions in the Figure 14 In the air extraction stage, the gas pressure is released, and the support disc 312, the elastic diaphragm 313 and the eccentric sleeve 311 all slide downward along the axial direction of the support disc 312, and the elastic diaphragm 313 gradually contracts. At this time, the first matching rod 341 slides downward along the left side of the special-shaped tooth 361, thereby driving the elastic diaphragm 313 to rotate around the axial direction of the elastic diaphragm 313.

[0067] In one of the embodiments, the base 314 is fixedly provided with a limiting block 363. Specifically, the limiting block 363 is fixedly provided in the first movable slot 351, for limiting the rotation of the eccentric sleeve 311 around its own axis.

[0068] In one of the embodiments, the eccentric sleeve 311 is fixedly provided with a second matching rod 342, and the guide rail 401 is fixedly provided with a support plate 403. The support plate 403 on the straight section guide rail 401 is fixedly provided with a plurality of gear teeth 362, which are arranged along the radial direction of the eccentric sleeve 311. The two sides of the gear teeth 362 are both provided with inclined surfaces. Along the advancing direction of the aeration unit 300, the inclined surface first contacted by the second matching rod 342 is a first inclined surface, which has a relatively gentle inclination angle; the other inclined surface is a second inclined surface, which has a relatively steep inclination angle. The top of the gear teeth 362 is provided with a rounded corner or a reserved space, so that the second matching rod 342 can smoothly pass over the top of the gear teeth 362, preventing the second matching rod 342 from being stuck when moving to the top, and ensuring smooth movement.

[0069] Specifically, during the aeration stage, the support disc 312, the elastic diaphragm 313 and the eccentric sleeve 311 all slide upward along their own axial direction, i.e. the up-down direction in the coordinate system. Figure 10 At this time, the second matching rod 342 slides upward along the first inclined surface of the gear teeth 362 to the top of the gear teeth 362, and generates a radial displacement, i.e. the up-down direction in the coordinate system. Figure 19 During the air extraction stage, the air pressure is released, and the support disc 312, the elastic diaphragm 313 and the eccentric sleeve 311 all slide downward along their own axial direction. At this time, the second matching rod 342 smoothly passes over the top of the gear teeth 362, and slides downward along the second inclined surface of the gear teeth 362 to the bottom of the gear teeth 362. Because the second inclined surface is steep, under the action of the self-gravity of the second matching rod 342 and the matching components thereof and the external air conveying system, the second matching rod 342 rapidly descends, and because the eccentric sleeve 311 is acted on by the limiting block 363, the eccentric sleeve 311 generates a radial displacement, thereby driving the base 314 and the communication pipe 315 connected thereto to move synchronously, thereby pushing the entire aeration unit 300 to move forward along the guide rail 401. It is worth noting that because the support plate 403 on the curved section guide rail 401 is not provided with gear teeth 362, when the eccentric sleeve 311 on the straight section guide rail 401 moves forward, it will push the eccentric sleeve 311 and the components connected thereto on the curved section guide rail 401 to smoothly pass through the curve, thereby realizing continuous and stable sliding operation.

[0070] In particular, the edge and bottom area of the sewage pool 100 often has flow dead zones, in which the sewage and gas are not mixed uniformly and sufficiently, resulting in a reduced sewage treatment efficiency. Therefore, through the axial and radial movement of the eccentric sleeve 311, the elastic diaphragm 313 and the support disc 312 and other components, the flow dead zones at the bottom and edge of the pool can be disturbed, so that the sewage in the flow dead zones flows, the contact opportunity of the sewage with the gas is enhanced, and the sewage treatment efficiency is improved.

[0071] In one embodiment, the inner part of the eccentric sleeve 311 is coaxially provided with a sealing ring 371 and a scraper 372, both of which are arranged between the elastic diaphragm 313 and the eccentric sleeve 311. The scraper 372 is coaxially and slidingly connected with the sealing ring 371, the scraper 372 is arranged on the inner side of the sealing ring 371, and both the sealing ring 371 and the scraper 372 can slide axially along themselves. In particular, the axial dimension of the sealing ring 371 is greater than that of the scraper 372.

[0072] Further, the scraper 372 is fixedly provided with a spring 373, and one end of the spring 373 is fixedly connected with the eccentric sleeve 311.

[0073] Specifically, when the elastic diaphragm 313 slides upward along the axial direction of itself, the sealing ring 371 and the scraper 372 are driven to slide upward synchronously, i.e. Figure 11 When the eccentric sleeve 311 stops sliding, the continuous expansion of the elastic diaphragm 313 presses the sealing ring 371, so that the sealing ring 371 forms an effective seal against the connecting plate 302, preventing sewage from flowing between the elastic diaphragm 313 and the base 314. At the same time, the continuous expansion of the elastic diaphragm 313 further pushes the scraper 372 to slide upward along the axial direction of itself and relatively displaces with the sealing ring 371, thereby compressing the spring 373. At this time, when the elastic diaphragm 313 rotates around the axial direction of itself and relatively rotates with the scraper 372, the scraper 372 can remove impurities on the surface of the elastic diaphragm 313. When the elastic diaphragm 313 slides downward along the axial direction of itself, the sealing ring 371 and the scraper 372 gradually reset. At the same time, the spring 373 gradually recovers to its original state, and the elastic force of the spring 373 further pushes the scraper 372 to reset.

[0074] Further, the coaxial outer side of the eccentric sleeve 311 is provided with a second bellows 212. One end of the second bellows 212 is fixedly connected with the eccentric sleeve 311, and the other end is fixedly connected with the base 314, further preventing sewage from flowing into the inside of the eccentric sleeve 311.

[0075] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0076] The above-described embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation on the scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An intelligent multi-stage sewage treatment system, characterized in that, The utility model relates to a sewage treatment device, including: Support module, aeration module and gas delivery module; The support module includes a sewage pool for storing sewage; The gas delivery module is used to deliver gas to the aeration module; The aeration module includes a plurality of aeration units connected in sequence, which are arranged in the sewage pool for aeration treatment of sewage; The aeration unit includes an eccentric sleeve, a base and an elastic diaphragm, the eccentric sleeve is coaxially and slidingly connected with the base, the elastic diaphragm is coaxially arranged in the eccentric sleeve, the eccentric sleeve and the elastic diaphragm are coaxially and slidingly connected, and the elastic diaphragm and the eccentric sleeve can rotate relative to each other; a circular through hole is formed in the eccentric sleeve, the center axis of the circular through hole does not coincide with the center axis of the eccentric sleeve; a plurality of first through holes for gas passing through are formed in the elastic diaphragm; when the gas delivery module delivers gas to the elastic diaphragm, the eccentric sleeve and the elastic diaphragm can slide along their own axes, and the middle part of the elastic diaphragm can expand along its own axis to open the first through hole; When the gas delivery module detects that the input gas pressure is too large, the gas delivery module can periodically drive the elastic diaphragm to rotate around its own axis to change the relative contact area of the elastic diaphragm and the eccentric sleeve; The aeration unit includes a support disc coaxially arranged between the base and the elastic diaphragm, the support disc and the base can slide relative to each other, and the support disc is coaxially and slidingly connected with the eccentric sleeve; the elastic diaphragm is coaxially connected with the support disc, a plurality of second through holes for gas passing through are formed in the support disc, and the second through holes are axially misaligned with the first through holes; when the gas delivery module delivers gas, the support disc can slide along its own axis to drive the elastic diaphragm to slide along its own axis. 2.The intelligent multi-stage sewage treatment system according to claim 1, characterized in that, The support module further includes a guide rail fixed to the bottom of the sewage pool, the guide rail is connected in sequence to form an annular structure; the aeration unit further includes a communication pipe, a first limiting half and a second limiting half, the first limiting half and the second limiting half are coaxially connected with the communication pipe, and the first limiting half and the second limiting half are detachably connected; the first limiting half, the second limiting half and the communication pipe are slidingly arranged in the guide rail, and all slide along the extension direction of the guide rail; a fixed column is fixedly arranged on the first limiting half, and the base is coaxially and threadedly connected with the fixed column. 3.The intelligent multi-stage sewage treatment system according to claim 2, characterized in that, A limiting block is fixedly arranged in the guide rail, and the limiting block is used to support the first limiting half, the second limiting half and the communication pipe.

4. The intelligent multi-stage sewage treatment system according to claim 1, characterized in that, A first matching rod is fixedly arranged on the elastic diaphragm, a plurality of profiled teeth are fixedly arranged on the eccentric sleeve, and the profiled teeth are circumferentially arranged around the center axis of the eccentric sleeve; when the elastic diaphragm rotates around its own axis, the first matching rod cooperates with the profiled teeth to drive the elastic diaphragm to rotate around its own axis.

5. The intelligent multi-stage sewage treatment system according to claim 1, wherein, The base is fixedly provided with a limiting block for limiting rotation of the eccentric sleeve about its own axis. 6.The intelligent multi-stage sewage treatment system according to claim 2, characterized in that, The eccentric sleeve is fixedly provided with a second matching rod, the guide rail is fixedly provided with a support plate, a plurality of gear teeth are fixedly provided on the support plate on the straight section of the guide rail, and the plurality of gear teeth are arranged radially along the eccentric sleeve; when the eccentric sleeve slides along its own axis, the second matching rod cooperates with the gear teeth to drive the communication pipe to slide along the extension direction of the guide rail. 7.The intelligent multi-stage sewage treatment system according to claim 1, characterized in that, The eccentric sleeve is coaxially provided with a scraper inside, the scraper can slide along its own axis, and the scraper is arranged between the elastic diaphragm and the eccentric sleeve; the scraper is used to remove impurities on the surface of the elastic diaphragm. 8.The intelligent multi-stage sewage treatment system according to claim 7, characterized in that, The eccentric sleeve is coaxially provided with a sealing ring inside, the sealing ring can slide along its own axis, and the sealing ring is arranged between the elastic diaphragm and the eccentric sleeve; the scraper and the sealing ring are coaxially connected in sliding mode, the scraper is arranged on the inner side of the sealing ring, and the axial dimension of the sealing ring is greater than that of the scraper; the sealing ring is used to prevent sewage from flowing between the elastic diaphragm and the base. 9.The intelligent multi-stage sewage treatment system according to claim 7, characterized in that, A spring is further included, one end of the spring is fixedly connected with the scraper, and the other end of the spring is fixedly connected with the eccentric sleeve; the spring is used to drive the scraper to reset.

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