A liner plate combined flexible aerator

Abstract

The utility model discloses a kind of inner lining plate combined flexible aerators, including air inlet frame and several groups of plate-shaped microporous aeration unit embedded side by side in air inlet frame;Plate-shaped microporous aeration unit is made of support plate and microporous cylinder membrane, which is flatly coated on support plate and both ends are closed, and its bottom middle position is provided with the air inlet hole of air inlet frame upper air inlet and microporous cylinder membrane upper portion communication.The utility model flexible aerator realizes quick installation and partial replacement by the modularization combination structure of plate-shaped microporous aeration unit, and stress distribution is dispersed in combination with cylindrical diaphragm design, with the advantages of large horizontal development area, large aeration capacity, high oxygen utilization efficiency;It can be installed close to pool bottom, maximize the use of pool depth, effectively increase the sewage treatment capacity per unit area;And its structure design is novel, strong stability, long service life.

Description

Technical Field

[0001] This utility model relates to a microporous aerator for sewage treatment, and more particularly to a flexible aerator with an inner lining plate. Background Technology

[0002] Microporous membrane aerators have almost completely replaced traditional rigid aerators due to their advantages such as high oxygen utilization, low energy consumption, small and uniform bubble size, good anti-clogging properties, self-cleaning function, easy maintenance, stable and uniform air distribution, long service life, and low production cost. They are widely used in the construction and renovation projects of modern wastewater treatment plants. While existing flexible high-efficiency aerators have improved scaling problems through their ultra-fine microporous structure, they generally use a single-layer membrane and mechanical fixing design. Under long-term high-pressure conditions, this design is prone to stress concentration at the connection between the membrane and the support structure, leading to membrane rupture or detachment. Furthermore, existing aeration devices generally use an integral structure, requiring the replacement of the entire aeration unit when a local membrane is damaged, resulting in material waste and increased maintenance costs. Utility Model Content

[0003] To address the aforementioned problems in the prior art, this invention proposes a flexible aerator with a combined inner lining plate, which has the advantages of a large horizontal unfolding area, large aeration capacity, high oxygen utilization efficiency, and strong structural stability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a flexible aerator with an inner liner, comprising an air inlet frame and several sets of plate-shaped microporous aeration units arranged side by side within the air inlet frame, wherein:

[0006] The plate-shaped microporous aeration unit consists of a support plate and a microporous membrane that is flat and covered on the surface of the support plate and closed at both ends. An air inlet is provided at the middle of its bottom, which connects the air inlet on the air inlet frame and the upper part of the microporous membrane.

[0007] Preferably, the intake frame includes a square frame and an intake pipe assembly, wherein:

[0008] The square frame is a rectangular picture frame structure, with its left and right sides bent inward to form a first slot for securing the plate-shaped microporous aeration unit, and a number of air inlets arranged at intervals in the middle.

[0009] The air intake pipe assembly consists of an air intake pipe body and an aeration connector located at one end of the air intake pipe body. The other end of the air intake pipe body is located on the back of the square frame and is connected to the air inlet.

[0010] Preferably, the edges of the square frame are all bent inward to form a first slot arranged horizontally opposite to the left and a second slot arranged front and back opposite to the right, wherein:

[0011] The left and right ends of each of the plate-shaped microporous aeration units are respectively embedded in the corresponding first slots; and

[0012] The top end of the foremost plate-shaped microporous aeration unit and the bottom end of the rearmost plate-shaped microporous aeration unit are respectively embedded in the corresponding second slots.

[0013] More preferably, the square frame has first mounting holes at the four corners corresponding to each of the air inlets, and the corresponding support plates are connected by first fasteners.

[0014] The square frame has second mounting holes on both sides corresponding to each air inlet, and the corresponding support plates are connected by second fasteners.

[0015] More preferably, the intake frame further includes a mounting bracket, which consists of a connecting plate and L-shaped lugs disposed at both ends of the connecting plate, wherein:

[0016] The connecting plate is fixedly installed at both ends of the back of the square frame, and the L-shaped ear plate is installed at the bottom of the aeration tank using height-adjustable fasteners.

[0017] Preferably, the support plate is a rectangular plate structure made of metal or plastic, with a first vent hole and a first countersunk hole in the middle, and second countersunk holes at both ends, wherein:

[0018] The first vent hole is arranged corresponding to the air inlet, and its diameter is larger than that of the air inlet;

[0019] There are four first countersunk holes, located at the four corners of the first vent hole, which are respectively arranged to correspond to the four first mounting holes on the square frame.

[0020] There are multiple second countersunk holes, located on the left and right sides of the first vent hole, respectively corresponding to the second mounting holes on the square frame.

[0021] More preferably, a sealing gasket is provided at the bottom of the support plate corresponding to the position of the first vent hole, wherein:

[0022] The sealing gasket is arranged through the second vent hole at the bottom of the microporous membrane and is sealed to the air inlet on the square frame.

[0023] Preferably, the microporous membrane is made of TPU, TPEE, TPAE, TPV, or TPR material, and has ultrafine pores evenly distributed on it. The sealing ends at both ends are sealed by high-frequency welding or folding and pressing. A second vent hole and a first perforation are opened in the middle of its bottom, and second perforations are opened at both ends.

[0024] The second vent is arranged corresponding to the air inlet, and its diameter is larger than that of the air inlet;

[0025] There are four first perforations, located at the four corners of the second vent, which correspond to the four first mounting holes on the square frame, respectively.

[0026] The two perforations are multiple and located on the left and right sides of the second vent, respectively corresponding to the second mounting holes on the square frame.

[0027] Preferably, the micropores are not provided between the folds near the air intake frame on each of the microporous membranes, forming a partition area.

[0028] Preferably, a buffer pad is provided at the connection between the folded edge around the air intake frame and the microporous membrane.

[0029] Preferably, the plate-shaped microporous aeration unit composed of the support plate and the microporous membrane is in the form of at least 3 groups, and they are closely arranged with each other.

[0030] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0031] The flexible aerator with a liner plate combination provided by this utility model adopts a plate-shaped microporous aeration unit composed of a support plate and a microporous cylindrical membrane that is flat and closed at both ends covering the surface of the support plate. This modular combination structure enables rapid installation and partial replacement of the aeration device. Combined with the cylindrical membrane design to disperse stress distribution, it has the advantages of large horizontal unfolding area, large aeration volume, strong stirring ability, and high oxygen utilization efficiency. It can be installed close to the bottom of the pool to maximize the utilization of the pool depth, effectively increasing the sewage treatment capacity per unit area and preventing sludge sedimentation. Moreover, its novel structural design, strong stability, easy maintenance and replacement, long service life, and high practical value make it highly valuable. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of a flexible aerator with an inner lining plate combination according to the present invention. Figure 1 ;

[0033] Figure 2 This is a three-dimensional structural diagram of a flexible aerator with an inner lining plate combination according to the present invention. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the cross-sectional structure of a flexible aerator with an inner lining plate combination according to the present invention.

[0035] Figure 4 This utility model Figure 3 The diagram shows a partially enlarged structural schematic of part A in a flexible aerator with a combined inner liner.

[0036] Figure 5 This is a schematic diagram of the main structure of a flexible aerator with an inner lining plate combination according to the present invention.

[0037] Figure 6 This utility model Figure 5 The diagram shows a cross-sectional view of section AA in a flexible aerator with a combined inner liner.

[0038] Figure 7 This utility model Figure 6 The diagram shows a partially enlarged structural schematic of part B in a flexible aerator with an inner liner assembly.

[0039] Figure 8 This utility model Figure 7 The diagram shows a cross-sectional view of the BB section in a flexible aerator with a combined inner liner.

[0040] Figure 9 This utility model Figure 8 The diagram shows a partially enlarged structural schematic of part C in a flexible aerator with a combined inner liner.

[0041] Figure 10 This is a schematic diagram of the exploded structure of a flexible aerator with an inner lining plate combination according to the present invention. Figure 1 ;

[0042] Figure 11 This is a schematic diagram of the main structure of the air inlet frame in a flexible aerator with an inner lining plate combination according to the present invention.

[0043] Figure 12 This is a schematic diagram of the left front view of the air inlet frame in a flexible aerator with a combined inner liner plate according to the present invention.

[0044] Figure 13 This is a bottom view of the air intake frame in a flexible aerator with an inner lining plate combination according to the present invention.

[0045] Figure 14 This is a three-dimensional structural diagram of the support plate in a flexible aerator with an inner lining plate combination according to the present invention.

[0046] Figure 15 This is a three-dimensional structural diagram of the microporous membrane in a flexible aerator with an inner liner plate combination according to the present invention.

[0047] The accompanying figures are labeled as follows:

[0048] 100-Intake frame, 110-Square frame, 111-Folded edge, 112-First slot, 113-Second slot, 114-Intake port, 115-First mounting hole, 116-Second mounting hole; 120-Intake pipe assembly, 121-Intake pipe body, 122-Aeration connector; 130-Mounting bracket, 131-Connecting plate, 132-L-shaped ear plate; 140-First fastener, 150-Second fastener;

[0049] 200-Support plate, 201-First vent hole, 202-First countersunk hole, 203-Second countersunk hole, 204-Sealing gasket;

[0050] 300 - Microporous membrane, 301 - Ultrafine pores, 302 - Sealing end, 303 - Second vent, 304 - First perforation, 305 - Second perforation; 311 - Partition area. Detailed Implementation

[0051] The present invention will be described in detail below through specific embodiments to enable a better understanding of the present invention. However, the following embodiments do not limit the scope of the present invention.

[0052] In some embodiments, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 10 As shown, this application proposes a flexible aerator with a combined inner liner for wastewater treatment, which mainly includes an air inlet frame 100 and several sets of plate-shaped microporous aeration units arranged side by side within the air inlet frame 100. Each plate-shaped microporous aeration unit consists of a support plate 200 and a microporous cylindrical membrane 300 that is flat and covers the surface of the support plate 200 and is closed at both ends. An air inlet 114 connecting the air inlet frame 100 and the upper part of the microporous cylindrical membrane 300 is opened at the middle of its bottom. The air inlet frame 100 serves as a supporting platform, forming a matrix aeration surface through the front and rear arranged plate-shaped units. In each aeration unit, the support plate 200 provides rigid support to prevent membrane collapse, and the microporous cylindrical membrane 300 wraps around the support plate 200 to form a double-layer structure.

[0053] The air intake frame 100 refers to the main support structure that carries the aeration unit. It is made of welded metal profiles and has air passages inside. The length and width of the air intake frame 100 are 50-500cm * 10-200cm, and the thickness is 1.0-5cm; preferably, its length and width are 150cm * 100cm, and the thickness is 2.5-3cm.

[0054] The plate-shaped microporous aeration unit refers to an independent gas diffusion module with standardized dimensions, facilitating mass production and replacement. The support plate 200 refers to the rigid substrate that maintains the shape of the aeration unit. It can be made of injection-molded polypropylene sheet to ensure the flatness of the membrane when it is unfolded and to have a certain degree of bending strength, which facilitates the installation of the plate-shaped microporous aeration unit.

[0055] The microporous membrane 300 refers to the gas diffusion layer that wraps around the support plate 200. Specifically, it can be made of TPU material and sealed at both ends to form a closed air cavity. "Sleeving" refers to covering the support plate 200 with the microporous membrane 300 in a flat, plate-like shape. The pre-tightening force generated by the microporous membrane 300 causes it to adhere to the outer periphery of the support plate 200, forming a flat, double-layered aeration membrane structure, thus increasing the unit aeration area on the upper surface of the microporous membrane 300.

[0056] In use, gas enters the plate-shaped microporous aeration unit through the air inlet 114 on the frame, fills the cavity between the microporous membrane 300 and the support plate 200 through the air inlet in the middle of the bottom, and then diffuses evenly through the ultrafine pores 301 on the membrane surface. The support plate 200 plays a role in shaping the microporous membrane 300 during aeration. When a single microporous membrane 300 is damaged, it can be disassembled and replaced individually without affecting the overall structure.

[0057] Compared to traditional single-layer membranes fixed to the support surface with adhesive or bolts, which are prone to peeling under pressure fluctuations, this solution employs a fully enclosed cylindrical structure, ensuring that the microporous membrane 300 is evenly stressed across the surface of the support plate 200. Existing aeration devices often use an integral structure, requiring the removal of adjacent units for maintenance. In contrast, this solution's plate-shaped microporous aeration unit is modularly designed, allowing for individual unit maintenance.

[0058] Structurally, this application effectively prevents air leakage caused by membrane edge cracking. The modular plate-shaped microporous aeration unit structure, consisting of a support plate 200 and a microporous cylindrical membrane 300, reduces downtime for maintenance. The synergistic effect of the double-layer membrane structure formed by the microporous cylindrical membrane 300 and the rigid support formed by the support plate 200 enhances compressive strength, enabling the aeration device to adapt to higher air pressure conditions. The independent unit design of the plate-shaped microporous aeration unit reduces maintenance costs; when a local area is damaged, only a single aeration unit needs to be replaced, without the need for complete disassembly, thus improving maintenance efficiency and reducing maintenance costs.

[0059] Regarding the aeration effect, this application combines multiple modular plate-shaped microporous aeration units to form a large-area aeration plane, which can effectively overcome the aeration dead zone problem of existing disc aerators. It has the advantages of large horizontal expansion area, large aeration volume, high oxygen utilization efficiency, more uniform air distribution, good oxygen transfer rate, and low energy consumption. Moreover, this large flexible aerator can be installed close to the bottom of the pool, which can maximize the utilization of the pool depth and effectively increase the sewage treatment capacity per unit area.

[0060] In some of these embodiments, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 12 and Figure 13 As shown, this application further proposes an air intake frame 100 including a square frame 110 and an air intake pipe assembly 120. The square frame 110 is a rectangular frame structure, which refers to a closed frame formed by bending four sides, used to provide overall support and installation reference for the aeration unit. If necessary, reinforcing ribs can be provided on the back of the square frame 110 to further improve the deformation resistance of the square frame 110 and increase the service life of the device.

[0061] The left and right sides of the square frame 110 have folded edges 111 that bend inward to form first slots 112 for securing the plate-shaped microporous aeration units. The first slots 112 are continuous grooves formed on the inner side of the folded edges 111, used to constrain the lateral displacement of the plate-shaped aeration units. The air inlets 114 are through holes arranged longitudinally along the middle of the bottom of the groove inside the frame. Each hole corresponds to an air inlet at the bottom of a set of aeration units, forming an independent air supply channel.

[0062] The square frame 110 has several air inlets 114 arranged at intervals in the middle. The air inlet pipe assembly 120 consists of an air inlet pipe body 121 and an aeration connector 122 located at one end of the air inlet pipe body 121. The other end of the air inlet pipe body 121 is located on the back of the square frame 110 and communicates with the air inlets 114. If necessary, a check valve can be installed at each air inlet 114 so that if one aeration unit is damaged, it will not affect the normal use of other aeration units.

[0063] The air inlet pipe 121 is a hollow, square-section pipe made of stainless steel, aluminum alloy, PVC, or HDPE. It is fixed to the back of the square frame 110 by welding, and its inner hole connects to each air inlet 114, forming an integrated structure. The aeration connector 122 is the interface component connecting to the external air supply pipe 121, using a flange or quick-connect fitting to achieve rapid connection between the air source and the air inlet pipe 121. Furthermore, a check valve can be installed on the air inlet pipe 121 as needed to prevent backflow of gas within the aeration chamber.

[0064] Specifically, the square frame 110 provides a double-sided positioning reference for multiple plate-shaped aeration units through the continuous first slots 112 formed by the left and right side folded edges 111, so that the plate-shaped microporous aeration units can be inserted into the corresponding first slots 112 when both ends are fully inserted, and move back and forth along the length of the slots to a preset position, such as moving to the front or rear end position, and then further locked with fasteners.

[0065] The equally spaced air inlets 114 in the center of the square frame 110 form a vertically continuous structure with the air inlets of each aeration unit, ensuring that each aeration unit has an independent air supply path. Furthermore, a check valve can be installed at each air inlet 114 as needed, so that if one aeration unit is damaged, it will not affect the normal operation of other aeration units.

[0066] As one of the preferred embodiments, such as Figure 11 , Figure 12 and Figure 13 As shown, this application further proposes that the folded edges 111 around the square frame 100 are all bent inward to form first slots 112 arranged side-by-side and second slots 113 arranged front-to-back. The left and right ends of each plate-shaped microporous aeration unit are respectively embedded in the corresponding first slots 112, and the frontmost and rearmost plate-shaped microporous aeration units are respectively embedded in the corresponding second slots 113. That is, the four sides of the aeration module formed by splicing multiple plate-shaped microporous aeration units are all secured in the corresponding slots, improving the structural stability of the aeration unit installation.

[0067] During installation, the microporous membrane 300 is made of a soft, elastic material, preferably TPU. First, each microporous membrane 300 is fitted onto a support plate 200 with bolts, and each bolt passes through its corresponding hole, thus assembling each plate-shaped microporous aeration unit sequentially. Then, the two ends of multiple plate-shaped microporous aeration units are bent downwards to produce elastic deformation, shortening the distance between the ends and allowing them to be inserted at an angle into the first slots 112 on both sides. After insertion, the bent plate-shaped microporous aeration units are restored to a flat shape by the elasticity of the support plate 200, pressing both ends tightly into the first slots 112, achieving horizontal positioning through the first slots 112 on both sides.

[0068] As needed, the inserted plate-shaped microporous aeration units are moved back and forth to preset positions. For example, one aeration unit is moved to the foremost position, so that its edge is embedded in the second slot 113 at the front end. Then, another aeration unit is moved to the rearmost position, so that its edge is embedded in the second slot 113 at the rear end. After the plate-shaped microporous aeration units on both the front and rear sides are engaged in the second slot 113, the remaining plate-shaped microporous aeration units are inserted in sequence, so that the front and rear plate-shaped microporous aeration units are interference-fitted together. They are then fixed to the square frame 110 with fasteners. After the four-way slot structure is formed, the aeration unit group is rigidly constrained in the lateral direction by the first slot 112, and the longitudinal direction is restricted by the second slot 113 to limit the longitudinal displacement of the overall structure. When the aeration device generates fluid impact during operation, the front and rear slots can prevent the unit group from slipping due to vibration, and at the same time avoid misalignment between adjacent units due to pressure fluctuations.

[0069] Specifically, as one particular implementation method, such as Figure 2 , Figure 7 , Figure 10 and Figure 11 As shown, in order to achieve structural stability between each plate-shaped microporous aeration unit and the air inlet frame 100, fasteners are used to further lock and fix each plate-shaped microporous aeration unit as described above. This application further proposes to open first mounting holes 115 at the four corners of each air inlet 114 on the square frame 100, and connect the corresponding support plates 200 through first fasteners 140 respectively; and to open second mounting holes 116 at both ends of each air inlet 114 on the square frame 110, and connect the corresponding support plates 200 through second fasteners 150 respectively.

[0070] The first mounting hole 114 refers to the positioning connection hole located at the four corners of the air inlet 114, used to install the first fastener 140 to establish the vertical positioning of the support plate 200 and the air intake frame 100. The second mounting hole 115 refers to the connection hole located on both sides of the air inlet 114, used to install the second fastener 150 to restrain the displacement at both ends of the support plate 200. The first fastener 140 and the second fastener 150 are both conventionally known fastening assemblies or rivets containing bolts, spring washers, and nuts, used to fix and lock the middle and both ends of the plate-shaped microporous aeration unit to the air intake frame 100, ensuring the stability of the aeration device structure.

[0071] like Figure 1 , Figure 2 and Figure 11As shown, this application further proposes that the air intake frame 100 also includes a mounting bracket 130. The mounting bracket 130 consists of a connecting plate 131 and L-shaped ear plates 132 disposed at both ends of the connecting plate 131. The connecting plate 131 is welded and fixed to both ends of the back of the square frame 110. The L-shaped ear plates 132 are installed at the bottom of the aeration tank using height-adjustable fasteners. The connecting plate 131 is rigidly connected to the frame by welding or bolting, and is used to transfer the overall load of the aeration device to the mounting bracket 130. The L-shaped ear plate 132 is a support component with a right-angle bending structure, which is an integral structure with the connecting plate 131. Bolt holes are provided on its vertical side for connecting and adjusting fasteners, and mounting holes are provided on its horizontal side for fixing to the bottom of the tank. The bending structure enhances the bending resistance.

[0072] The height-adjustable fasteners used refer to conventionally known connecting devices that include screws, adjusting nuts, locking nuts, and washers. Specifically, they can be achieved using galvanized bolts of M12-M16 specifications with hexagonal nuts and wing nuts. The screws are fixed to the bottom of the pool using expansion bolts. By rotating the nuts, the installation gap between the L-shaped lugs and the bottom of the pool is changed, thereby adjusting the vertical installation height of the aeration device.

[0073] The mounting bracket 130 is rigidly connected to the square frame 110 via the connecting plate 131, ensuring that the overall load of the aeration device is evenly distributed to the L-shaped ear plates 132 on both sides. The vertical sides of the L-shaped ear plates 132 are fixed to the bottom of the tank with fasteners, and the horizontal sides are anchored to the concrete structure of the tank bottom with expansion bolts. When there are construction errors at the bottom of the aeration tank or when the installation height needs to be adjusted, the effective length of the fasteners can be changed by rotating the wing nuts, allowing the L-shaped ear plates 132 to move vertically and achieve horizontal alignment of the aeration device's installation plane.

[0074] In some of these embodiments, such as Figure 3 , Figure 4 , Figure 11 and Figure 14 As shown, this application further proposes that the support plate 200 is a rectangular plate structure made of metal or plastic, possessing a certain degree of bending elasticity, with both ends capable of bending under external force, facilitating manual insertion into the corresponding slots. The support plate 200 is a rectangular plate with dimensions of 50-500cm x 5-80cm and a thickness of 1.0-3.5cm. It has a first vent hole 201 and a first countersunk hole 202 in the middle, and second countersunk holes 203 at both ends. The countersunk hole structure allows the bolt heads to be fully embedded inside the plate, maintaining the flatness of the mounting surface of the support plate 200 and preventing protruding parts from scratching the microporous membrane 300.

[0075] The first vent 201 is arranged corresponding to the air inlet 114, and its diameter is larger than that of the air inlet 114. The enlarged diameter design of the first vent 201 allows the gas to form a diffusion space before entering the aeration membrane, avoiding direct airflow that could cause local stress concentration on the membrane. Four first countersunk holes 202 are located at the four corners of the first vent 201, corresponding to the four first mounting holes 115 on the square frame 110. The four corner countersunk holes 202 ensure precise alignment between the support plate 200 and the frame 100 through a four-point positioning method, preventing sealing failure caused by installation misalignment. Multiple second countersunk holes 203 are located on the left and right sides of the first vent 201, corresponding to the second mounting holes 116 on the square frame 110. The multiple second countersunk holes 203 distributed on the left and right sides form a linear fixing array. By increasing the number of fixing points, the fixing strength of the support plate 200 edge is improved, effectively suppressing structural vibration caused by water flow impact.

[0076] As one of the preferred embodiments, such as Figure 9 and Figure 14 As shown, to improve the sealing performance between the air inlet at the bottom of the plate-shaped microporous aeration unit and the air inlet 114 on the air inlet frame 100, and to prevent air leakage, this application further proposes that a sealing gasket 204 be provided at the bottom of the support plate 200 corresponding to the position of the first vent 201. The sealing gasket 204 passes through the second vent 303 at the bottom of the microporous membrane 300 and is sealed to the air inlet 114 on the square frame 110. The sealing gasket 204 is an elastic sealing component embedded in the contact surface between the support plate 200 and the air inlet 201, which can be made of rubber or silicone. Its function is to fill the assembly gap between the support plate and the frame. The second vent 303 is a through hole opened at the bottom of the microporous membrane 300, the diameter of which is larger than the size of the air inlet 114, so that the sealing gasket 204 can pass through the membrane and form a contact seal with the frame. This design allows the membrane to deform under pressure to enhance the sealing effect.

[0077] In use, the sealing gasket 204 is clamped between the support plate 200 and the square frame 110 of the air inlet frame 100. When the support plate 200 is fixed by fasteners 140 and 150, the sealing gasket 204 is compressed and expands radially, thereby filling the microscopic uneven areas around the bottom surface of the support plate 200 and the air inlet 114 of the frame. Under air pressure, the microporous membrane 300 adheres tightly to the outer surface of the sealing gasket 204, and its elastic material properties enable an adaptive contact seal between the membrane and the sealing gasket 204. This double-sealing structure not only compensates for processing and assembly errors, but also automatically adjusts the sealing contact pressure according to air pressure fluctuations during the operation of the aeration system, ensuring that gas is discharged only through the preset microporous diffusion path.

[0078] In some of these embodiments, such as Figure 1 , Figure 4 , Figure 9 , Figure 10 and Figure 15 As shown, this application further proposes that the microporous membrane 300 is made of thermoplastic polyurethane elastomer (TPU), linear thermoplastic elastomer (TPEE), thermoplastic polyamide elastomer (TPAE), thermoplastic vulcanized rubber (TPV), or thermoplastic rubber material (TPR), with TPU being the preferred material. The microporous membrane 300 has I-shaped or needle-shaped ultrafine pores 301 evenly distributed on it. These ultrafine pores 301 are I-shaped or needle-shaped micropores with a diameter of approximately 0.1-5 mm. During aeration, the gas pressure causes the ultrafine pores 301 to expand and release bubbles; after aeration stops, the membrane elastically contracts, causing the ultrafine pores 301 to automatically close, preventing sludge backflow and achieving a self-cleaning function.

[0079] Specifically, the sealing ends 302 at both ends of the microporous membrane 300 are sealed by high-frequency welding or folding and pressing. For example, after folding the edges of the membrane at both ends of the membrane to form the sealing ends 302, they are directly inserted into the first slot 112 with an interference fit. The seal is formed by the extrusion force between the membrane and the frame and the tension when the membrane expands, thereby eliminating the risk of seal failure caused by adhesive aging.

[0080] Furthermore, a second vent 303 and a first through hole 304 are provided at the center of the bottom of the microporous membrane 300, and second through holes 305 are provided at both ends. The diameter of the second vent 303 is larger than the size of the air inlet 114 and slightly smaller than the diameter of the sealing gasket 204, so that the sealing gasket 204 is tightly inserted into the second vent 303 to achieve an interference seal. The four corner first through holes 304 are arranged to correspond with the frame first mounting holes 115, meaning that the through holes at the four corners of the bottom of the diaphragm match the bolt holes on the frame, and the axial positioning constraint between the diaphragm 300 and the support plate 200 is achieved by bolt fastening. The two side second through holes 305 are arranged to correspond with the frame second mounting holes 116, meaning that multiple through holes at the left and right ends of the diaphragm match the bolt holes on the sides of the frame, and the multi-point fixing enhances the anti-displacement ability of the edges of the diaphragm 300.

[0081] In some of these embodiments, such as Figure 1 , Figure 2 and Figure 5 As shown, this application further proposes that no ultrafine pores 301 be provided between the folds near the air inlet frame 100 on each microporous membrane 300, forming a partition region 311. The partition region refers to the peripheral area where the microporous membrane 300 contacts the frame fold 111. This region, by eliminating the micropore distribution, forms a continuous and dense structure, improving the membrane strength between the microporous membrane 300 and the surrounding frame. The ultrafine pores 301 refer to the pores uniformly distributed in the main body area of ​​the microporous membrane 301, achieving efficient aeration by controlling the pore size within the range of 0.1-3 mm.

[0082] In one preferred embodiment, based on actual application requirements, this application further proposes to provide buffer pads at the connection between the folded edges 111 around the air intake frame 100 and the microporous membrane 300. The buffer pads can be made of TPU, PVC, EPDM, or silicone material, and are continuously arranged along the contact area between the folded edges 111 and the membrane.

[0083] As one of the preferred embodiments, such as Figure 1 , Figure 5 and Figure 11 As shown, this application provides a flexible aerator with an inner liner assembly. The plate-shaped microporous aeration units composed of the support plate 200 and the microporous membrane 300 are at least three groups, and are closely arranged together. Preferably, the plate-shaped microporous aeration units composed of the support plate 200 and the microporous membrane 300 are five groups, and are closely arranged together.

[0084] Combination Figures 1 to 15 As shown, the installation and use principle of the flexible aerator with inner lining plate combination is as follows: (1) Assembly of plate-shaped microporous aeration unit: each microporous cylindrical membrane 300 is respectively fitted onto the support plate 200 with bolts, and each bolt passes through the corresponding through hole to complete the assembly of the plate-shaped microporous aeration unit; (2) Assembly of aeration device: the two ends of each plate-shaped microporous aeration unit are bent downwards, inserted into the first slot 112 on both sides at an angle, and moved back and forth to the preset position, and locked with the corresponding nuts to complete the assembly of each plate-shaped microporous aeration unit on the air inlet frame 100; (3) the assembled aeration device is installed at the bottom of the aeration tank through the ear plates 132 at its four corners using height-adjustable fasteners, and its height is adjusted so that the aeration device is kept at a distance from the bottom of the tank. (4) The aeration connector 122 is connected by a high-pressure air pipe, and the other end is connected to an external compressor. The valve on the aeration connector 122 is opened to introduce high-pressure air. The high-pressure gas enters the upper area of ​​the microporous membrane 300 through the air inlet 114 and the air inlet hole at the bottom of the plate-shaped microporous aeration unit via the air inlet pipe 121, and achieves efficient aeration through the distributed ultrafine micropores 301. (5) When it is necessary to maintain or replace the damaged microporous membrane 300 or support plate 200, it is only necessary to remove the corresponding fasteners on the back. The middle part of the plate-shaped microporous aeration unit arches upward under the elastic force of the support plate 200 itself, or the middle part is pried up by an external tool such as a flathead screwdriver. The plate-shaped microporous aeration unit is removed and only the damaged parts need to be replaced.

[0085] The specific embodiments of this utility model have been described in detail above, but they are merely examples, and this utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to this utility model are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model should be covered within the scope of this utility model.

Claims

1. A flexible aerator with an inner lining plate assembly, characterized in that, It includes an air intake frame (100) and several sets of plate-shaped microporous aeration units arranged side by side within the air intake frame (100), wherein: The plate-shaped microporous aeration unit consists of a support plate (200) and a microporous cylindrical membrane (300) that is flat and covers the surface of the support plate (200) and is closed at both ends. The bottom center of the microporous membrane has an air inlet (114) that connects the air inlet frame (100) and the upper part of the microporous cylindrical membrane (300).

2. The flexible aerator with combined inner lining plate according to claim 1, characterized in that, The intake frame (100) includes a square frame (110) and an intake manifold assembly (120), wherein: The square frame (110) is a rectangular frame structure, with its left and right sides (111) bent inward to form a first slot (112) for securing the plate-shaped microporous aeration unit, and a number of air inlets (114) arranged at intervals in the middle. The air intake pipe assembly (120) consists of an air intake pipe body (121) and an aeration connector (122) located at one end of the air intake pipe body (121). The other end of the air intake pipe body (121) is located on the back of the square frame (110) and is connected to the air inlet (114).

3. The flexible aerator with combined inner lining plate according to claim 2, characterized in that, The folded edges (111) around the square frame (110) are all bent inward to form a first slot (112) arranged opposite to each other on the left and right and a second slot (113) arranged opposite to each other on the front and back, wherein: The left and right ends of each of the plate-shaped microporous aeration units are respectively embedded in the corresponding first slot (112); and The top end of the foremost plate-shaped microporous aeration unit and the bottom end of the last plate-shaped microporous aeration unit are respectively embedded in the corresponding second slot (113).

4. The flexible aerator with combined inner lining plate according to claim 2, characterized in that, The intake frame (100) further includes a mounting bracket (130), which is composed of a connecting plate (131) and L-shaped ear plates (132) disposed at both ends of the connecting plate (131), wherein: The connecting plate (131) is fixedly installed at both ends of the back of the square frame (110), and the L-shaped ear plate (132) is installed at the bottom of the aeration tank using height-adjustable fasteners.

5. The flexible aerator with combined inner lining plate according to claim 2, characterized in that, The support plate (200) is a rectangular plate structure made of metal or plastic, with a first vent hole (201) and a first countersunk hole (202) in the middle, and a second countersunk hole (203) at both ends.

6. The flexible aerator with combined inner lining plate according to claim 5, characterized in that, A sealing gasket (204) is provided at the bottom of the support plate (200) corresponding to the position of the first vent (201), wherein: The sealing gasket (204) is arranged through the second vent (303) at the bottom of the microporous membrane (300) and is sealed to the air inlet (114) on the square frame (110).

7. The flexible aerator with combined inner lining plate according to claim 1, characterized in that, The microporous membrane (300) is made of TPU, TPEE, TPAE, TPV or TPR material, and has ultrafine micropores (301) evenly distributed on it. Both ends are set as sealing ends (302), and a second vent hole (303) and a first perforation (304) are opened in the middle of its bottom, and a second perforation (305) is opened at both ends.

8. The flexible aerator with combined inner lining plate according to claim 7, characterized in that, The micropores (301) are not provided between the folds (111) near the air intake frame (100) on each of the microporous membranes (300), forming a partition area (311).

9. The flexible aerator with combined inner lining plate according to claim 1, characterized in that, A buffer pad is provided at the connection between the flange (111) around the air intake frame (100) and the microporous membrane (300).

10. The flexible aerator with combined inner lining plate according to claim 1, characterized in that, The plate-shaped microporous aeration unit composed of the support plate (200) and the microporous membrane (300) consists of at least 3 groups, which are closely arranged with each other.

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