A single-orifice membrane air diffuser and method of assembly

Abstract

The application discloses a single-hole membrane air diffuser and an assembling method thereof, and belongs to the technical field of aeration equipment. The single-hole membrane air diffuser comprises upper clamping pipes, lower clamping pipes and fixing rings for locking the end portions of the upper and lower clamping pipes after splicing. An air outlet is formed in the upper clamping pipe, and an anti-blocking net and a single-hole diaphragm are arranged in the air outlet in an up-down distribution mode. The mesh aperture of the anti-blocking net is smaller than the aperture of the single-hole diaphragm. The anti-blocking net is arranged above the single-hole diaphragm, direct contact between filter material and the single-hole diaphragm is prevented, the risk of single-hole diaphragm blockage is effectively reduced, and the aeration effect is ensured. Meanwhile, the anti-blocking net can limit the deformation of the single-hole diaphragm to some extent, and the service life of the single-hole diaphragm is prolonged. In addition, the anti-blocking net can cut the generated gas, and the uniformity of aeration is further improved.

Description

Technical Field

[0001] This invention belongs to the field of aeration equipment technology, and more specifically, relates to a single-pore membrane air diffuser and its assembly method. Background Technology

[0002] To provide the oxygen needed for microbial survival, conventional biological filters typically rely on natural ventilation through ventilation holes at the bottom of the filter. This method easily leads to uneven air pressure distribution, causing short-circuiting and localized air blockage. Natural ventilation is also limited by the temperature difference between the filter and the air temperature, the filter height, the porosity of the filter media, and wind speed, making it unable to provide stable and uniform ventilation. Aerated biological filters, on the other hand, replace natural ventilation by forcibly introducing air into the filter media layer. This ensures a sufficient and stable supply of oxygen for the metabolism of the microorganisms living on the filter media, thereby improving the overall effectiveness of the aerated biological filter.

[0003] The single-pore membrane air diffuser is an important component of the BAF aeration system. It is unaffected by the temperature difference between the tank and the air, and is not limited by the height of the filter bed or the porosity of the filter media. It produces small bubble diameters and a wide bubble distribution range, ensuring sufficient oxygen for microbial survival. Existing single-pore membrane air diffusers generally consist of an upper clamp, a lower clamp, a single-pore membrane, and fasteners.

[0004] For example, Chinese Patent Application No. CN 206447667 U discloses a single-pore membrane air diffuser. This application includes a cylindrical body with an aeration nozzle. The aeration nozzle has an aeration channel communicating with the inner wall of the body, and a single-pore membrane is located at the junction of the aeration channel and the inner wall of the body. An opening is provided along the axial direction between the inner and outer walls of the body, allowing the body to open into a "C" shape and engage with the aeration tube. Both sides of the opening have protrusions that merge into a cylindrical shape when the opening is closed. A flange is provided at the end of each protrusion opposite the opening. The application also includes a clamping nut with an elliptical clamping hole. The minor axis of the clamping hole is equal to the diameter of the protrusion, and the major axis of the clamping hole is twice the diameter of the protrusion. The cross-section of the clamping nut along its length is arc-shaped, fitting snugly against the curvature of the outer wall of the body when installed on the protrusion.

[0005] For example, Chinese Patent Application No. CN 214734779 U discloses a single-pore membrane air diffuser for an aerated biological filter. The application includes an air inlet pipe with positioning rings evenly arranged on its surface. Connecting pipes are provided between adjacent positioning rings and are threadedly connected to the top surface of the air inlet pipe. A lower cylinder is fixed to the top surface of the connecting pipe, and a switching device is located inside the lower cylinder. An upper cone is fixed to the top surface of the lower cylinder, and aeration ports are evenly arranged on the surface of the upper cone. A fixing device is evenly arranged on the bottom surface of the air inlet pipe. Using the switching device and the upper cone, the lower cylinder is threadedly connected to the top surface of the air inlet pipe via the connecting pipe. Air is introduced into the air inlet pipe by a fan, and the gas enters the air inlet pipe, the connecting pipe, the lower cylinder, and then the upper cone, where it is aerated through the aeration ports on the surface of the upper cone.

[0006] The above applications all involve technical improvements to single-pore membrane air diffusers, but they still have the following drawbacks:

[0007] 1) The single-pore membrane comes into direct contact with the filter media in the biological filter, which can easily cause clogging of the membrane pores, thus affecting the aeration effect;

[0008] 2) When the aeration or backwashing air pressure is high, it is easy to cause deformation of the single-pore membrane, which accelerates the wear of the single-pore membrane and will also affect the final aeration effect. Summary of the Invention

[0009] 1. The problem to be solved

[0010] In view of at least some of the problems existing in the prior art, the present invention proposes a single-pore membrane air diffuser and its assembly method, the purpose of which is to solve the problems of easy deformation of the single-pore membrane and easy clogging of the membrane pores in the existing single-pore membrane air diffuser, thereby affecting the aeration effect.

[0011] 2. Technical Solution

[0012] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0013] The present invention provides a single-hole membrane air diffuser, comprising a clamp tube consisting of an upper clamp tube and a lower clamp tube, and a fixing ring sleeved on the end of the clamp tube for locking the upper and lower clamp tubes.

[0014] The upper clamp tube is provided with an air outlet, and a single-hole diaphragm is provided at the junction of the air outlet and the aeration tube, and an anti-clogging mesh is provided inside the air outlet.

[0015] The anti-clogging mesh has a smaller pore size than the single-pore membrane. By installing the anti-clogging mesh, direct contact between the filter media and the single-pore membrane is prevented, effectively reducing the risk of membrane clogging. Simultaneously, it can also cut the generated gas, further improving the uniformity of aeration.

[0016] Furthermore, the distance between the anti-clogging mesh and the single-hole diaphragm is less than 6mm, which can limit the deformation of the single-hole diaphragm to a certain extent. While effectively preventing uneven aeration caused by excessive deformation of the single-hole diaphragm, it also extends the service life of the single-hole diaphragm.

[0017] Furthermore, the inner wall of the lower clamping tube is provided with a positioning pin that matches the positioning hole on the aeration tube, and the positioning pin is provided with several reinforcing ribs in the circumferential direction to prevent the positioning pin from breaking due to excessive force during the locking operation.

[0018] Furthermore, the end face of the clamping tube is provided with a locking block, and the inner ring wall of the fixing ring has a first groove along its axial direction for the locking block to pass through; the end face of the inner ring wall of the fixing ring is provided with a second groove, which divides the end face of the inner ring wall into a plane a and a concave surface b, with plane a close to the first groove; wherein, the end face of the locking block and plane a are in an interference fit, and the end face of the locking block and the concave surface b are in a clearance fit. After the locking block passes through the first groove, it rotates into the second groove, thus limiting the locking block.

[0019] Furthermore, the end face of the fixing ring is provided with a limiting block, and the outer peripheral wall of the clamping tube is provided with a stop block that cooperates with the limiting block. When the fixing ring drives the limiting block to rotate to the side of the stop block, the continued rotation of the limiting block is limited by the stop block.

[0020] Furthermore, there are four of each of the card blocks and the first groove, and two of the card blocks are composed of two half-card blocks at the joint of the upper and lower clamping tubes.

[0021] Furthermore, a second groove is provided on both sides of the first groove, so that no matter which direction the fixing ring 2 rotates, it can drive the locking block on it to be locked into one of the second grooves to complete the limiting.

[0022] Furthermore, the limiting block is disposed at the opening of the first groove, and the top of the limiting block does not exceed the bottom of the first groove.

[0023] Furthermore, the end of the fixing ring is provided with a first marking block, and its outer peripheral wall is provided with a second marking block.

[0024] Furthermore, the second identifier block is provided in three parts, with the middle second identifier block serving as the starting identifier block and the other two second identifier blocks serving as the ending identifier blocks.

[0025] An assembly method for a single-pore membrane air diffuser according to the present invention includes the following steps:

[0026] S1. Install the single-hole diaphragm at the bottom of the air outlet and the anti-clogging net inside the air outlet; then clamp the upper and lower clamps onto the aeration pipe.

[0027] S2. The fixing ring sleeved on the aeration pipe passes through the first groove on it, passes through the clamping block on the clamping pipe and approaches the stop block;

[0028] S3. Then rotate the fixed ring. The end face of the locking block rubs against the end face of the fixed ring and rotates to lock into the second groove, completing one limit.

[0029] At the same time, the limiting block rotates with the fixed ring to the side of the stop block, completing the secondary limiting;

[0030] At this point, the first marker block rotates to the locking position, and this is used to determine that the fixing ring has rotated into place.

[0031] 3. Beneficial effects

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] (1) The single-pore membrane air diffuser of the present invention isolates the direct contact between the filter material and the single-pore membrane by providing an anti-clogging net above the single-pore membrane, effectively reducing the risk of clogging of the single-pore membrane and ensuring the aeration effect; at the same time, by setting the anti-clogging net, on the one hand, it can limit the deformation of the single-pore membrane to a certain extent and extend the service life of the single-pore membrane; on the other hand, it can also cut the generated gas, which can further improve the uniformity of aeration.

[0034] (2) A single-hole membrane air diffuser of the present invention has a locking block on the end face of the clamp tube, a first groove is provided on the inner ring wall of the fixing ring along its axial direction, and a second groove is provided on the end face of the inner ring wall of the fixing ring. After the locking block passes through the first groove, it rotates into the second groove to complete the first limiting operation. The end face of the fixing ring is provided with a limiting block, and the outer peripheral wall of the clamp tube is provided with a stop block. When the fixing ring drives the limiting block to rotate to the side of the stop block, the second limiting operation is completed, thereby finally completing the locking operation of the fixing ring on the clamp tube. This embodiment adopts a locking method of snap-fit, which is more convenient and faster to operate and has a better anti-loosening effect compared with the traditional threaded locking.

[0035] (3) In a single-hole membrane air diffuser of the present invention, the end of the fixing ring is provided with a first marking block and the outer peripheral wall is provided with a second marking block; after the fixing ring is rotated into place, the locking block on the fixing ring is just aligned with the first marking block; it can more intuitively judge whether the fixing ring has been rotated into place, and while ensuring the assembly quality, it brings convenience to quality inspection and maintenance operations. Attached Figure Description

[0036] Figure 1This is a schematic diagram of the structure of a single-pore membrane air diffuser according to the present invention;

[0037] Figure 2 This is a schematic diagram of a single-pore membrane air diffuser equipped with an aeration pipe according to the present invention.

[0038] Figure 3 for Figure 2 This is a sectional view along the AA direction;

[0039] Figure 4 This is a schematic diagram of the upper clamping tube in this invention;

[0040] Figure 5 This is a cross-sectional view of the upper clamping tube in this invention.

[0041] Figure 6 This is a schematic diagram of the lower clamp tube in this invention;

[0042] Figure 7 This is a schematic diagram of the structure of the fixing ring in this invention;

[0043] Figure 8 This is a schematic diagram of the assembled structure of a single-pore membrane air diffuser according to the present invention.

[0044] In the diagram: 1. Clamping pipe; 11. Upper clamping pipe; 111. Air outlet; 12. Lower clamping pipe; 121. Positioning pin; 122. Reinforcing rib; 13. Locking block; 131. Semi-locking block; 14. Stop block;

[0045] 2. Fixing ring; 21. First groove; 22. Second groove; 23. Limiting block; 24. First marking block; 25. Second marking block;

[0046] 3. Single-hole diaphragm; 4. Anti-clogging mesh; 5. Aeration pipe. Detailed Implementation

[0047] The present invention will be further described below with reference to specific embodiments.

[0048] Example 1

[0049] like Figure 1 , Figure 2 As shown, a single-pore membrane air diffuser of this embodiment includes a clamping tube 1, a fixing ring 2, and an aeration tube 5.

[0050] The aeration pipe 5 has multiple aeration holes distributed along its axial direction (not shown in the figure), and the clamp is used to clamp onto the aeration pipe 5 and press the single-hole membrane 3 tightly at the aeration hole.

[0051] Specifically, the clamping tube is a split design, comprising an upper clamping tube 11 and a lower clamping tube 12, both of which are arc-shaped structures. The two clamping tubes are combined to form a cylindrical structure, the inner diameter of which is adapted to the outer diameter of the aeration pipe 5.

[0052] Two fixing rings 2 are provided, which are respectively fitted onto both ends of the clamping tube 1 to lock the ends of the upper and lower clamping tubes after splicing.

[0053] refer to Figure 3 , Figure 4 The upper clamping tube 11 is provided with an air outlet 111. A single-hole diaphragm 3 is provided at the junction of the air outlet 111 and the aeration tube 5, and an anti-clogging mesh 4 is provided inside the air outlet 111. The mesh diameter of the anti-clogging mesh 4 is smaller than the mesh diameter of the single-hole diaphragm 3.

[0054] This embodiment of a single-pore membrane air diffuser, by providing an anti-clogging mesh 4 above the single-pore membrane 3, isolates the filter media from direct contact with the single-pore membrane 3, effectively reducing the risk of clogging of the single-pore membrane 3 and helping to ensure the aeration effect. At the same time, the anti-clogging mesh 4 can also cut the generated gas, which can further improve the uniformity of aeration.

[0055] Furthermore, to prevent excessive deformation of the single-hole diaphragm 3 due to excessive aeration pressure, which could lead to uneven aeration and damage, the anti-clogging net 4 should be positioned as close as possible to the single-hole diaphragm 3 to minimize its deformation under excessive impact. Simultaneously, the anti-clogging net 4 also prevents the single-hole diaphragm 3 from repeatedly bulging, increasing its fatigue resistance and extending its service life.

[0056] Specifically, in this embodiment, the air outlet 111 is shaped like an inverted frustum, wider at the top and narrower at the bottom. This inverted frustum design also helps to improve uneven aeration. The upper diameter of this frustum is 12-20mm, the lower diameter is 3-12mm, and the inner angle at the upper diameter is 30-80°.

[0057] The anti-clogging net 4 has a size of 16-30mm and a mesh diameter of 0.1-5mm. Preferably, the distance between the anti-clogging net 4 and the single-hole membrane 3 is less than 6mm to prevent the aeration membrane from being excessively deformed and exceeding its fatigue strength, thus ensuring more uniform aeration.

[0058] Example 2

[0059] When assembling the clamp 1 with the aeration pipe 5, it is necessary to ensure that the air outlet 111 on the clamp 1 corresponds to the aeration hole on the aeration pipe 5. Therefore, a positioning structure is provided between the two to ensure the accuracy of the assembly.

[0060] refer to Figure 1 , Figure 3 As shown, the inner wall of the lower clamping tube 12 is provided with a positioning pin 121, and the outer wall of the aeration tube 5 is provided with a positioning hole for the positioning pin 121 to be inserted (not shown in the figure).

[0061] In addition, in order to improve the strength of the positioning pin 121 and prevent it from breaking during use, the positioning pin 121 is provided with reinforcing ribs 122 in the circumferential direction, and there are no fewer than two reinforcing ribs 122.

[0062] In this specific embodiment, the height of the positioning pin 121 is 3-6mm. Four reinforcing ribs 122 are provided, and they are evenly spaced.

[0063] Example 3

[0064] Traditionally, the fixing ring 2 and the clamping tube 1 are usually connected by threads. This connection method requires rotating the fixing ring 2 many times, and the threads are prone to come loose during aeration vibration, which can lead to loosening between the fixing ring 2 and the clamping tube 1, resulting in large-scale aeration and the emergence of large bubbles.

[0065] To address the aforementioned issues, in this implementation, the fixing ring 2 and the clamping tube 1 are locked together using a snap-fit ​​method.

[0066] Specifically, refer to Figure 4 , Figure 7 As shown, the end face of the clamping tube 1 is provided with a locking block 13, and the inner ring wall of the fixing ring 2 is provided with a first groove 21 along its axial direction for the locking block 13 to pass through.

[0067] The inner ring wall of the fixing ring 2 has a second groove 22 on its end face. This second groove 22 divides the end face of the inner ring wall into a plane a and a concave surface b, with plane a close to the first groove 21. That is, the first groove 21 is actually formed on the inner ring wall corresponding to plane a. The end face of the locking block 13 is in an interference fit with plane a, and the end face of the locking block 13 is in a clearance fit with the concave surface b.

[0068] During assembly, the locking block 13 on the clamp tube 1 passes through the first groove 21 on the fixing ring 2 and enters the inner side of the fixing ring 2; then the fixing ring 2 is rotated, and the end face of the locking block 13 moves in friction with the plane a on the end face of the fixing ring 2; when the locking block 13 continues to rotate into the second groove 22 (i.e., the b face of the end face of the fixing ring 2), it is confined in the second groove 22, thereby realizing the locking operation between the fixing ring 2 and the clamp tube 1.

[0069] In order to ensure that the locking block 13 can be engaged in the second groove 22 regardless of whether the fixing ring 2 rotates clockwise or counterclockwise, thereby achieving the locking operation between the fixing ring 2 and the clamping tube 1, a second groove 22 is provided on both sides of the first groove 21.

[0070] In addition, to facilitate the snap-fit ​​insertion operation between the fixing ring 2 and the clamping tube 1, multiple snap-fit ​​blocks 13 and first grooves 21 can be provided, and their positions and quantities correspond one-to-one. Of course, a second groove 22 needs to be provided between each two adjacent first grooves 21.

[0071] In this specific embodiment, there are four of each of the card blocks 13, the first groove 21 and the second groove 22, and two of the card blocks 13 are composed of two half card blocks 131 at the splicing point of the upper and lower clamping tubes.

[0072] In other words, reference Figure 4 , Figure 6 As shown, each of the upper and lower clamping tubes is provided with a half-clamping block 131, and the two half-clamping blocks 131 are spliced ​​together to form a complete clamping block 13.

[0073] In this embodiment of a single-hole membrane air diffuser, the fixing ring 2 and the clamping tube 1 are locked together by the interlocking of the locking block 13 and the second groove 22. Compared with the traditional threaded locking, the operation is more convenient and faster, and the anti-loosening effect is better.

[0074] Example 4

[0075] To further ensure the stability of the connection between the fixing ring 2 and the clamping tube 1, the connection structure between the two has been further optimized in this implementation.

[0076] refer to Figure 4 , Figure 6 , Figure 7 As shown, the end face of the fixing ring 2 is provided with a limiting block 23, and the outer peripheral wall of the clamping tube 1 is provided with a stop block 14 that cooperates with the limiting block 23.

[0077] When the limiting block 23 rotates with the fixing ring 2 to the side of the stop block 14, the rotation of the limiting block 23 can be limited due to the stopping effect of the stop block 14.

[0078] Of course, in order to ensure that the limiting block 23 can be stopped and limited by the stop block 14 whether the fixed ring 2 rotates clockwise or counterclockwise, there can be two or more limiting blocks 23 or stop blocks 14.

[0079] Specifically, in this embodiment, four limiting blocks 23 are provided, and the limiting blocks 23 are located at the openings of the corresponding first grooves 21.

[0080] However, it should be noted that the limiting block 23 should not interfere with the passage of the locking block 13 through the first groove 21. That is, the top of the limiting block 23 should not exceed the bottom of the first groove 21.

[0081] Additionally, it should be noted that the aforementioned four limiting blocks 23 refer to the number of limiting blocks 23 provided on one side of the fixing ring 2. In reality, the fixing ring 2 has limiting blocks 23 on both sides, and they correspond one-to-one. That is, there are a total of eight limiting blocks 23 on the entire fixing ring 2.

[0082] In this embodiment, a single-hole membrane air diffuser uses a stop block 14 to limit the rotation angle of the limiting block 23, and a second groove 22 to limit the locking block 13, which further ensures the stability of the connection between the fixing ring 2 and the clamping tube 1.

[0083] Example 5

[0084] In order to more intuitively and quickly determine whether the rotation of the fixing ring 2 on the clamp tube 1 is in place, so as to ensure the stability of the connection between the two.

[0085] refer to Figure 7 , Figure 8 As shown, in this embodiment of a single-hole membrane air diffuser, the end of the fixing ring 2 is provided with a first marking block 24.

[0086] Since the first marker block 24 rotates with the rotation of the fixed ring 2, when the fixed ring 2 rotates into place, the first marker block 24 will just stop at the position of the locking block 13, so that it can be intuitively judged that the fixed ring 2 has rotated into place.

[0087] Furthermore, since the locking block 13 will inevitably remain within the second groove 22 after the fixing ring 2 rotates into position, the first marking block 24 is positioned within the area covered by the second groove 22, and each second groove 22 is equipped with one first marking block 24.

[0088] Specifically, in this embodiment, the first identifier block 24 is also provided with 4 blocks.

[0089] Example 6

[0090] This embodiment of a single-pore membrane air diffuser, based on the above embodiment, further includes a second identification block 25. Specifically, refer to... Figure 7 , Figure 8 As shown, the second marking block 25 is disposed on the outer peripheral wall of the fixing ring 2.

[0091] When two adjacent fixed rings 2 have rotated into place, the second marking blocks 25 on the two fixed rings 2 should correspond to each other to help determine whether the fixed rings 2 have rotated into place.

[0092] In actual operation, the rotation direction of different fixing rings 2 will be different. At the same time, with the addition of multiple locking blocks 13 and the first groove 21, the initial locking angle between the clamping tube 1 and the fixing ring 2 can also vary, which makes the alignment operation of the second marking block 25 somewhat difficult.

[0093] Therefore, in this embodiment, each fixing ring 2 is provided with three second marking blocks 25, with the middle second marking block 25 serving as the starting marking and the other two serving as the ending markings. The starting marking is positioned corresponding to the first groove 21.

[0094] Since the position of clamp 1 is relatively fixed after it is clamped onto aeration pipe 5, the position of clamp block 13 on clamp 1 is also relatively fixed.

[0095] In other words, when the fixing ring 2 is engaged with the clamp tube 1, it is only necessary to ensure that the first groove 21 with the starting mark passes through the uppermost clamping block 13 of the clamp tube 1; then, no matter which direction the fixing ring 2 rotates, one set of the ending marks on the two fixing rings 2 will always be on the same horizontal line, thus serving to determine whether the fixing ring 2 has rotated into place.

[0096] Example 7

[0097] This embodiment provides an assembly method for a single-pore membrane air diffuser, including the following steps:

[0098] S1. Install the single-hole diaphragm 3 at the bottom of the air outlet 111 and install the anti-clogging net 4 inside the air outlet 111; then clamp the upper and lower clamping tubes onto the aeration tube 5, while ensuring that the single-hole diaphragm 3 completely covers the aeration holes on the aeration tube 5, and insert the positioning pin 121 on the lower clamping tube 12 into the positioning hole on the outer wall of the aeration tube 5.

[0099] S2. Move the fixing ring 2 sleeved on the aeration pipe 5 so that the first groove 21 passes through the clamping block 13 on the clamping pipe 1 and approaches the stop block 14.

[0100] S3. Then rotate the fixing ring 2. The end face of the locking block 13 rubs against the end face of the fixing ring 2 and rotates to lock into the second groove 22, completing one limit.

[0101] At the same time, the limiting block 23 rotates to the side of the stop block 14 along with the fixing ring 2, completing the secondary limiting;

[0102] At this moment, the first marker block 24 rotates to the position of the locking block 13, and it is determined that the fixing ring 2 has rotated into place.

[0103] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A single-pore membrane air diffuser, characterized in that: It includes a clamp tube (1) consisting of an upper clamp tube (11) and a lower clamp tube (12), and a fixing ring (2) fitted at the end of the clamp tube (1) for locking the upper and lower clamp tubes. The upper clamp tube (11) is provided with an air outlet (111), and a single-hole diaphragm (3) is provided at the junction of the air outlet (111) and the aeration tube (5), and an anti-clogging mesh (4) is provided inside the air outlet (111). Wherein, the mesh size of the anti-clogging mesh (4) is smaller than the mesh size of the single-hole diaphragm (3); the distance between the anti-clogging mesh (4) and the single-hole diaphragm (3) is less than 6 mm; so as to limit the deformation of the single-hole diaphragm (3); The end face of the clamp (1) is provided with a locking block (13), and the inner ring wall of the fixing ring (2) is provided with a first groove (21) along its axial direction for the locking block (13) to pass through; the end face of the inner ring wall of the fixing ring (2) is provided with a second groove (22), which divides the end face of the inner ring wall into a plane a and a concave surface b, and the plane a is close to the first groove (21); wherein, the end face of the locking block (13) and the plane a are interference fit, and the end face of the locking block (13) and the concave surface b are clearance fit; The end of the fixing ring (2) is provided with a first marking block (24), and a second marking block (25) is provided on its outer peripheral wall; wherein, the first marking block (24) is located within the area covered by the second groove (22); each fixing ring (2) is provided with three second marking blocks (25), the second marking block (25) located in the middle is used as the starting mark, and the other two are used as the ending marks, and the setting position of the starting mark corresponds to the first groove (21).

2. The single-pore membrane air diffuser according to claim 1, characterized in that: The inner wall of the lower clamping tube (12) is provided with a positioning pin (121) that matches the positioning hole on the aeration tube (5), and the positioning pin (121) is provided with several reinforcing ribs (122) in the circumferential direction.

3. A single-pore membrane air diffuser according to claim 1 or 2, characterized in that: The end face of the fixing ring (2) is provided with a limiting block (23), and the outer peripheral wall of the clamping tube (1) is provided with a stop block (14) that cooperates with the limiting block (23).

4. A single-pore membrane air diffuser according to claim 3, characterized in that: The card block (13) and the first groove (21) are each provided with 4, and two of the card blocks (13) are composed of two half card blocks (131) at the splicing of the upper and lower clamping tubes.

5. A single-pore membrane air diffuser according to claim 3, characterized in that: The first groove (21) has a second groove (22) on both sides.

6. A single-pore membrane air diffuser according to claim 3, characterized in that: The limiting block (23) is disposed at the opening of the first groove (21), and the top of the limiting block (23) does not exceed the bottom of the first groove (21).

7. The assembly method of a single-pore membrane air diffuser according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Install the single-hole diaphragm (3) at the bottom of the air outlet (111) and install the anti-clogging net (4) inside the air outlet (111); then clamp the upper and lower clamps onto the aeration pipe (5); S2. The fixing ring (2) fitted on the aeration pipe (5) passes through the first groove (21) on it, through the clamping block (13) on the clamping pipe (1) and closes to the stop block (14). S3. Then rotate the fixed ring (2), the end face of the locking block (13) rubs against the end face of the fixed ring (2) and rotates to lock into the second groove (22), completing one limit; At the same time, the limiting block (23) rotates to the side of the stop block (14) along with the fixing ring (2), completing the secondary limiting; At this time, the first marker block (24) rotates to the position of the locking block (13), and it is determined that the fixing ring (2) has rotated into place.

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