Wastewater treatment device and microporous aeration disc thereof

Abstract

The utility model discloses a wastewater treatment device and a microporous aeration disc thereof. The microporous aeration disc comprises a base, a fixed cover, a microporous aeration membrane and a fixed part, a plurality of first clamping holes are formed in the base in the circumferential direction at intervals, and second clamping holes corresponding to the first clamping holes are formed in the fixed cover. The microporous aeration diaphragm is arranged between the base and the fixed cover, the fixed part is provided with a first clamping end and a second clamping end which are opposite to each other, and the fixed cover is matched with the base to compress and deform the microporous aeration diaphragm, so that the first clamping end enters the first clamping hole, and the second clamping end enters the second clamping hole; and the first clamping end is clamped with the first clamping hole and the second clamping end is clamped with the second clamping hole due to the springback of the microporous aeration membrane. The microporous aeration membrane can be quickly mounted and dismounted, does not need to rotate around the circle center, does not need to apply torque, does not affect the sealing effect of a connecting piece of the aeration disc base, and can be replaced and reused, so that the depreciation cost of equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a wastewater treatment device and a microporous aeration disc thereof. Background Art

[0002] As is well known, the process of sewage treatment is often accompanied by oxygenation, and the most commonly used oxygen supply is a microporous aeration disc. Existing microporous aeration discs generally consist of an upper rotary cover, an aeration membrane, and a base with an air inlet. During the production process, a relatively large force and torque are required between the rotary cover and the base to ensure that the membrane is firmly crimped, so as to ensure no air leakage or detachment during use.

[0003] However, since the connection between the aeration disc and the air supply pipe below it is also a threaded connection, and the diameter of the rotary cover is much larger than the threaded air inlet on the base. If the upper rotary cover of the aeration head is removed by rotation, the rotation torque is likely to affect the threaded sealing effect of the air pipe connected to the bottom of the aeration head. Therefore, it is difficult to replace the aeration membrane of the aeration head with a rotary-sealed aeration membrane on-site. As a result, the current aeration discs are basically disposable products, and they cannot be effectively cleaned and maintained after the membrane is blocked, resulting in a great waste of engineering investment. Summary of the Utility Model

[0004] Based on this, in view of the problems of difficult disassembly between the existing rotary cover and the base of the aeration disc, large difficulty in replacing the aeration membrane, and resulting waste of engineering investment, it is necessary to provide a wastewater treatment device and a microporous aeration disc thereof.

[0005] A microporous aeration disc, comprising:

[0006] A base, which is provided with a plurality of first clamping holes at intervals along its circumferential direction;

[0007] A fixed cover, which is provided with a plurality of second clamping holes corresponding to the first clamping holes;

[0008] A microporous aeration membrane, which is arranged between the base and the fixed cover; and

[0009] A fixing member, which has a first clamping end and a second clamping end opposite to each other. The fixed cover cooperates with the base to compress and deform the microporous aeration membrane, so that the first clamping end enters the first clamping hole, and the second clamping end enters the second clamping hole. The rebound of the microporous aeration membrane causes the first clamping end to be clamped with the first clamping hole, and the second clamping end to be clamped with the second clamping hole.

[0010] In one embodiment, the microporous aeration membrane includes a perforated aeration area in the center and a bulged portion at the periphery, and the fixed cover and the base clamp the bulged portion.

[0011] In one embodiment, at least one of the base and the fixed cover is provided with a positioning groove for positioning the bulging portion.

[0012] In one embodiment, the first clamping end includes a rod body and a clamping head. The rod body is inserted into the first clamping hole, and the clamping head is clamped with the end face of the first clamping hole; or

[0013] The first clamping end is a wedge-shaped structure, and the first clamping end gradually increases in the direction away from the second clamping end. The shape of the first clamping hole matches that of the first clamping end.

[0014] In one embodiment, the second clamping end includes a rod body and a clamping head. The rod body is inserted into the second clamping hole, and the clamping head is clamped with the end face of the second clamping hole; or

[0015] The second clamping end is a wedge-shaped structure, and the second clamping end gradually increases in the direction away from the first clamping end. The shape of the second clamping hole matches that of the second clamping end.

[0016] In one embodiment, the first clamping end and the second clamping end are of a split structure and are detachably connected, and the peripheral walls of the first clamping hole and the second clamping hole are integral.

[0017] In one embodiment, the first clamping end and the second clamping end are of an integrally formed structure, and the first clamping hole and the second clamping hole have a notch for the fixing member to enter.

[0018] In one embodiment, an elastic sleeve is sleeved outside the fixing member, and the diameter of the elastic sleeve is larger than the diameter of the notch.

[0019] In one embodiment, a deformation groove is provided in the first clamping end and / or the second clamping end so that it can be compressed and deformed to pass through the notch.

[0020] In one embodiment, an engaging concave-convex structure is provided between the first clamping end and the first clamping hole; and / or

[0021] An engaging concave-convex structure is provided between the second clamping end and the second clamping hole.

[0022] In one embodiment, an elastic pad is further included. The elastic pad is clamped between the fixed cover and the base, and the elastic pad is located outside the fixing member.

[0023] In one embodiment, the fixed cover and the base have overlapping lapping portions in the axial direction, and the first clamping hole and the second clamping hole are provided on the lapping portions.

[0024] A wastewater treatment device, comprising:

[0025] The microporous aeration disc according to any one of the above.

[0026] For the above wastewater treatment device and its microporous aeration disc, when the microporous aeration membrane needs to be replaced, the replaced microporous aeration membrane is arranged between the fixed cover and the base, and then the microporous aeration membrane is compressed and deformed. The first clamping end is arranged in the first clamping hole, and the second clamping end is arranged in the second clamping hole. After the external force is removed, the microporous aeration membrane rebounds, so that the first clamping end can be clamped with the first clamping hole, and the second clamping end can be clamped with the second clamping hole. It can be seen that the microporous aeration membrane can be quickly installed and disassembled. During the installation / disassembly process, it only needs to be clamped on both sides to achieve, without the need to rotate around the center of the circle, without the need to apply torque, and does not affect the sealing effect of the connecting parts of the aeration disc base. At the same time, the microporous aeration membrane can be replaced and reused, reducing the equipment depreciation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the components or parts do not necessarily draw according to the actual scale.

[0028] Figure 1 It is a schematic structural diagram of the microporous aeration disc in one embodiment;

[0029] Figure 2 For Figure 1 The schematic structural diagram of the base in

[0030] Figure 3 It is a schematic diagram of the base being oval;

[0031] Figure 4 It is a schematic diagram of the base being a variable arc;

[0032] Figure 5 For Figure 1 The schematic structural diagram of the fixed cover in

[0033] Figure 6 It is a schematic diagram of the fixing member clamping and fixing the base and the fixed cover;

[0034] Figure 7 For Figure 6 The schematic diagram of the positioning groove of the positioning bulges designed on the base and the fixed cover in

[0035] Figure 8 It is a schematic diagram of the bulging part of the microporous aeration membrane being semicircular;

[0036] Figure 9 It is a schematic diagram of an elastic sleeve sleeved outside the fixing member;

[0037] Figure 10 Schematic diagram of a deformation groove opened on one side of the fixing part;

[0038] Figure 11 Schematic diagram of the concave-convex structure of the bite between the fixing part and the clamping hole;

[0039] Figure 12 Schematic diagram of an elastic pad designed outside the fixing part;

[0040] Figure 13 Schematic diagram of the fixing part being a split riveting structure;

[0041] Figure 14 Schematic diagram of the fixing part being a bolt;

[0042] Figure 15 Schematic diagram of the first clamping end and the second clamping end being wedge-shaped;

[0043] Figure 16 Schematic diagram of the concave-convex structure of the bite between the wedge-shaped fixing part and the clamping hole;

[0044] Figure 17 Schematic diagram of the fixing part being a wedge-shaped structure and the combination of the rod body and the clamping head;

[0045] Figure 18 Schematic diagram of the inclined arrangement of the fixing part and the clamping hole;

[0046] Figure 19 Schematic diagram of the overlapping part extending downward and designing the clamping hole and the fixing part;

[0047] Figure 20 Schematic diagram of the overlapping part extending upward and designing the clamping hole and the fixing part.

[0048] Reference numerals:

[0049] 10 - Base, 11 - First clamping hole, 12 - Intake connection part, 13 - Check valve device, 14 - First reinforcing rib, 20 - Fixed cover, 21 - Second clamping hole, 22 - Positioning groove, 23 - Second reinforcing rib, 24 - Notch, 30 - Microporous aeration membrane, 31 - Perforated aeration area, 32 - Bulging part, 40 - Fixing part, 41 - First clamping end, 42 - Second clamping end, 43 - Rod body, 44 - Clamping head, 50 - Elastic sleeve, 60 - Deformation groove, 72 - Biting protrusion, 74 - Biting groove, 80 - Elastic pad, 90 - Overlapping part. Detailed implementation mode

[0050] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following detailed description of the specific embodiments of the present utility model will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0051] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0053] Embodiment 1

[0054] A wastewater treatment device in an embodiment includes a microporous aeration disk as Figure 1 shown. Specifically, the microporous aeration disk includes a base 10, a fixing cover 20, a microporous aeration membrane 30, and a fixing member 40.

[0055] Please refer to Figures 2 to 4 together. The base 10 is generally in a disk-like structure, and the shape of the base 10 is not limited. For example, it can be circular, elliptical or even polygonal arc-shaped. A plurality of first clamping holes 11 are provided at intervals along the circumferential direction of the base 10. In one embodiment, the first clamping holes 11 are evenly distributed at intervals along the circumferential direction to make the strength of the base 10 uniform. An air inlet connection part 12 is provided at the bottom of the base 10, and an external air inlet pipe is connected to the air inlet connection part 12 to supply gas into the base 10. A check device 13 is provided in the air inlet connection part 12 to prevent water pollutants from flowing back into the air inlet pipe.

[0056] Please refer to Figure 5 together. The shape of the fixing cover 20 matches the shape of the base 10. The fixing cover 20 is provided with a plurality of second clamping holes 21, and the plurality of second clamping holes 21 correspond to the plurality of first clamping holes 11. That is to say, the number of the second clamping holes 21 is the same as the number of the first clamping holes 11, and each first clamping hole 11 corresponds to a second clamping hole 21 in the axial direction.

[0057] The microporous aeration diaphragm 30 is disposed between the base 10 and the fixed cover 20, and the gas introduced into the base 10 can be aerated through the microporous aeration diaphragm 30. In one embodiment, the microporous aeration diaphragm 30 can be made of materials such as ethylene propylene diene monomer rubber, silicone rubber, and rubber with PTFE film.

[0058] Please refer to Figure 6 as well. The fixing member 40 has opposite first clamping ends 41 and second clamping ends 42. The fixed cover 20 and the base 10 cooperate to compress and deform the microporous aeration diaphragm 30, reducing the distance between the fixed cover 20 and the base 10, so that the first clamping end 41 enters the first clamping hole 11 and the second clamping end 42 enters the second clamping hole 21. Finally, when the external force is removed, the microporous aeration diaphragm 30 rebounds, increasing the distance between the fixed cover 20 and the base 10, enabling the first clamping end 41 to be clamped with the first clamping hole 11 and the second clamping end 42 to be clamped with the second clamping hole 21, thereby realizing the connection and fixation of the fixed cover 20 and the base 10.

[0059] In one embodiment, the microporous aeration diaphragm 30 includes a perforated aeration area 31 in the center and a bulged part 32 at the periphery, and the fixed cover 20 and the base 10 clamp the bulged part 32. Among them, due to the larger thickness, the bulged part 32 has a larger deformation range, which can cause a greater change in the distance between the fixed cover 20 and the base 10, facilitating the insertion of the first clamping end 41 into the first clamping hole 11 and the second clamping end 42 into the second clamping hole 21, while ensuring sufficient clamping force.

[0060] Please refer to Figure 7 and Figure 8 as well. In one embodiment, at least one of the base 10 and the fixed cover 20 is provided with a positioning groove 22 for positioning the bulged part 32. The positioning groove 22 can facilitate the installation and positioning of the microporous aeration diaphragm 30 and prevent sliding and displacement between the base 10 and the fixed cover 20. Specifically, when the bulged part 32 is circular, one or both of the base 10 and the fixed cover 20 are provided with the positioning groove 22; when the bulged part 32 is semicircular, any one of the base 10 and the fixed cover 20 can be provided with the positioning groove 22. The width of the positioning groove 22 should be greater than the diameter of the bulged part 32 so that the bulged part 32 is entirely located within the positioning groove 22 after deformation.

[0061] Please refer to Figure 6 again. In one embodiment, the first clamping end 41 includes a rod body 43 and a clamping head 44. The rod body 43 is inserted into the first clamping hole 11, and the clamping head 44 is clamped with the end face of the first clamping hole 11. The second clamping end 42 includes a rod body 43 and a clamping head 44. The rod body 43 is inserted into the second clamping hole 21, and the clamping head 44 is clamped with the end face of the second clamping hole 21.

[0062] When the microporous aeration diaphragm 30 is installed, after the microporous aeration diaphragm 30 is compressed and deformed, the rod body 43 is inserted into the first clamping hole 11 and the second clamping hole 21. After the external force is withdrawn and the microporous aeration diaphragm 30 rebounds, the clamping heads 44 are respectively clamped with the end faces of the first clamping hole 11 and the second clamping hole 21.

[0063] Please refer to Figure 2 and Figure 5 , in an embodiment, since the first clamping hole 11 and the second clamping hole 21 penetrate up and down, although the disassembly and assembly of the fixing member 40 are relatively easy, the up-and-down penetration of the holes has a certain impact on the strength of the base 10 and the fixing cover 20. Therefore, in this embodiment, the base 10 is provided with a first reinforcing rib 14, and the fixing cover 20 is provided with a second reinforcing rib 23 to enhance the strength of the base 10 and the fixing cover 20.

[0064] In an embodiment, the first clamping end 41 and the second clamping end 42 are of an integrally formed structure, and the first clamping hole 11 and the second clamping hole 21 have a notch 24 for the fixing member 40 to enter, so as to facilitate the installation of the fixing member 40.

[0065] Please refer to Figure 9 , further, an elastic sleeve 50 is sleeved outside the fixing member 40, and the elastic sleeve 50 is sleeved on the rod body 43. The elastic sleeve 50 can enter the first clamping hole 11 and the second clamping hole 21 through the notch 24 under the action of a flat push of an external force. The diameter of the elastic sleeve 50 is larger than the diameter of the notch 24. When the elastic sleeve 50 passes through the notch 24, it is squeezed and deformed to shrink, and resumes its shape after passing through the notch 24, which can prevent the fixing member 40 from slipping out of the first clamping hole 11 and the second clamping hole 21.

[0066] Please refer to Figure 10 , in an embodiment, a deformation groove 60 is provided in the first clamping end 41 and / or the second clamping end 42. The deformation groove 60 can enable the clamping end to be compressed and deformed so that the fixing member 40 can pass through the notch 24. After the fixing member 40 passes through the notch 24, the clamping end resumes its shape to achieve clamping and fixing, preventing the fixing member 40 from slipping out of the first clamping hole 11 and the second clamping hole 21.

[0067] Please refer to Figure 6 and Figure 11 , in an embodiment, an engaging concave-convex structure is provided between the first clamping end 41 and the first clamping hole 11, and an engaging concave-convex structure is provided between the second clamping end 42 and the second clamping hole 21. That is to say, an engaging concave-convex structure can be designed separately between the first clamping end 41 and the first clamping hole 11, or an engaging concave-convex structure can be designed separately between the second clamping end 42 and the second clamping hole 21, or an engaging concave-convex structure can be designed between the first clamping end 41 and the first clamping hole 11 as well as between the second clamping end 42 and the second clamping hole.

[0068] In this embodiment, an engaging concave-convex structure is designed between the first engaging end 41 and the first engaging hole 11, and between the second engaging end 42 and the second engaging hole. The engaging concave-convex structure includes an engaging protrusion 72 and an engaging groove 74, and the engaging protrusion 72 is inserted into the engaging groove 74. When the engaging groove 74 is designed on the fixed cover 20 and the base 10, the engaging protrusion 72 is the body of the engaging head 44 itself; when the engaging groove 74 is designed on the engaging head 44, the engaging protrusions 72 are correspondingly designed on the fixed cover 20 and the base 10.

[0069] Please refer to Figure 12 as well. In one embodiment, the microporous aeration disk further includes an elastic pad 80. The elastic pad 80 is clamped between the fixed cover 20 and the base 10, and the elastic pad 80 is located outside the fixing member 40. The elastic pad 80 can support the parts of the fixed cover 20 and the base 10 outside the fixing member 40, ensure uniform stress on the fixed cover 20 and the base 10, improve the stability of the fixing member 40, and prevent the fixing member 40 from slipping out.

[0070] In one embodiment, the base 10, the fixed cover 20 and the fixing member 40 of the microporous aeration disk are preferably made of polymer materials such as ABS, PE, PP, and fiberglass. Of course, in other embodiments, the base 10, the fixed cover 20 and the fixing member 40 of the microporous aeration disk can also be made of other metal materials that are not easily rusted.

[0071] For the above wastewater treatment device and its microporous aeration disk, the microporous aeration membrane 30 can be quickly installed and disassembled. During the installation / dismantling process, it only needs to be clamped on both sides to achieve, without the need to rotate around the center of the circle, without the need to apply torque, and does not affect the sealing effect of the connecting parts of the aeration disk base 10. At the same time, the microporous aeration membrane 30 can be replaced and reused, reducing the equipment depreciation cost.

[0072] Example 2

[0073] Please refer to Figure 13 and Figure 14 as well. The difference between Example 2 and Example 1 is that the first engaging end 41 and the second engaging end 42 are of a split structure, and the first engaging end 41 and the second engaging end 42 are detachably connected. At this time, the first engaging hole 11 and the second engaging hole 21 do not need to be designed with a notch 24, and the peripheral walls of the first engaging hole 11 and the second engaging hole 21 are of an integral structure, and the fixing member 40 can also be installed. Specifically, it can be a threaded connection between the rod bodies 43 of the first engaging end 41 and the second engaging end 42; or the fixing member 40 is a bolt, and the head of the bolt and the nut form two engaging heads 44.

[0074] Example 3

[0075] Please refer to Figure 15, Example 3 is different from Example 1 in that the structures of the first clamping end 41 and the second clamping end 42 of the fixing member 40, and the second clamping hole 21 of the first clamping hole 11 are different.

[0076] Specifically, the first clamping end 41 is wedge-shaped, and the first clamping end 41 gradually increases in the direction away from the second clamping end 42. The shape of the first clamping hole 11 matches that of the first clamping end 41. The second clamping end 42 is a wedge-shaped structure, and the second clamping end 42 gradually increases in the direction away from the first clamping end 41. The shape of the second clamping hole 21 matches that of the second clamping end 42.

[0077] When installing the microporous aeration diaphragm 30, compress and deform the microporous aeration diaphragm 30, insert the first clamping end 41 into the first clamping hole 11, and insert the second clamping end 42 into the second clamping hole 21. After the external force is removed and the microporous aeration diaphragm 30 rebounds, the wedge shape and the hole wall slide relative to each other to achieve clamping. At this time, since both the first clamping hole 11 and the second clamping hole 21 are wedge-shaped structures, and neither the first clamping hole 11 nor the second clamping hole 21 penetrates the upper and lower surfaces of the base 10 and the fixing cover 20, the influence on the strength of the base 10 and the fixing cover 20 is relatively small.

[0078] Please refer to Figure 16 further, the concavo-convex structures of the engagement between the first clamping end 41 and the first clamping hole 11 and between the second clamping end 42 and the second clamping hole 21 also change. Specifically, the side walls of the first clamping end 41 and the second clamping end 42 are provided with engaging protrusions 72, and the inner walls of the first clamping hole 11 and the second clamping hole 21 are provided with engaging grooves 74. The engaging protrusions 72 are inserted into the engaging grooves 74 to prevent the fixing member 40 from loosening out of the first clamping hole 11 and the second clamping hole 21.

[0079] Example 4

[0080] Please refer to Figure 17 , Example 4 is different from Example 1 in that the structures of the first clamping end 41 and the second clamping end 42 of the fixing member 40, and the second clamping hole 21 of the first clamping hole 11 are different. Specifically, the first clamping end 41 includes a rod body 43 and a clamping head 44, and the second clamping end 42 is wedge-shaped; or the first clamping end 41 is wedge-shaped and the second clamping end 42 includes a rod body 43 and a clamping head 44. That is to say, the structural form of the fixing member 40 in Example 4 is a combination of Example 1 and Example 3.

[0081] Example 5

[0082] Please refer to Figure 18 , Example 5 is different from Example 1 in that the opening directions and the fixing planes of the first clamping hole 11 and the second clamping hole 21 are not perpendicular, and this method helps to prevent the base 10 and the fixing cover 20 from sliding parallel to the adjacent surfaces.

[0083] Specifically, the first clamping hole 11 and the second clamping hole 21 are not coaxial, and the first clamping hole 11 and the second clamping hole 21 are axially offset from each other. After the microporous aeration diaphragm 30 is compressed, the first clamping hole 11 and the second clamping hole 21 are coaxially arranged along an inclined direction. At this time, the first clamping end 41 is inserted into the first clamping hole 11, and the second clamping end 42 is inserted into the second clamping hole 21. After the external force is removed and the microporous aeration diaphragm 30 rebounds, the first clamping hole 11 and the second clamping hole 21 are misaligned to realize the clamping of the fixing member 40.

[0084] Please refer to Figure 19 and Figure 20 , or, the base 10 and the fixing cover 20 have an overlapping lapping portion 90 in the axial direction. The lapping portion 90 can be formed by extending downward or upward. The first clamping hole 11 and the second clamping hole 21 are arranged on the lapping portion 90. At this time, the first clamping hole 11 and the second clamping hole 21 are horizontally extending holes. When installing the microporous aeration diaphragm 30, the microporous aeration diaphragm 30 is compressed to make the first clamping hole 11 and the second clamping hole 21 coaxial, and then the first clamping end 41 is inserted into the first clamping hole 11, and the second clamping end 42 is inserted into the second clamping hole 21. After the external force is removed and the microporous aeration diaphragm 30 rebounds, the first clamping hole 11 and the second clamping hole 21 are misaligned to realize the clamping of the fixing member 40.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the specification of the present invention.

Claims

1. A microporous aeration plate, characterized in that: include: A base, wherein the base is provided with a plurality of first clamping holes at intervals along a circumferential direction thereof; A fixed cover, wherein the fixed cover is provided with a plurality of second clamping holes corresponding to the first clamping holes; A microporous aeration membrane is provided between the base and the fixed cover; and A fixing member, wherein the fixing member has a first clamping end and a second clamping end opposite to each other, and the fixing cover cooperates with the base to compress and deform the microporous aeration membrane so that the first clamping end enters the first clamping hole, and the second clamping end enters the second clamping hole. The rebound of the microporous aeration membrane causes the first clamping end to be clamped with the first clamping hole, and the second clamping end to be clamped with the second clamping hole.

2. The microporous aeration disk according to claim 1, characterized in that: The microporous aeration membrane comprises a central perforated aeration zone and a peripheral enlarged portion, and the fixed cover and the base clamp the enlarged portion.

3. The microporous aeration disk according to claim 2, characterized in that: At least one of the base and the fixing cover is provided with a positioning groove for positioning the enlarged portion.

4. The microporous aeration disk according to claim 1, characterized in that: The first clamping end comprises a rod body and a clamping joint, the rod body is inserted into the first clamping hole, and the clamping joint is clamped with an end surface of the first clamping hole; or The first clamping end is a wedge-shaped structure, the first clamping end gradually increases in size in a direction away from the second clamping end, and the shape of the first clamping hole matches the first clamping end.

5. The microporous aeration disk according to claim 1, characterized in that: The second clamping end comprises a rod body and a clamping joint, the rod body is inserted into the second clamping hole, and the clamping joint is clamped with an end surface of the second clamping hole; or The second clamping end is a wedge-shaped structure, the second clamping end gradually increases in size away from the first clamping end, and the shape of the second clamping hole matches the second clamping end.

6. The microporous aeration disk according to claim 1, characterized in that: The first clamping end and the second clamping end are separate structures and are detachably connected, and the peripheral walls of the first clamping hole and the second clamping hole are integral.

7. The microporous aeration disk according to claim 1, characterized in that: The first clamping end and the second clamping end are an integrally formed structure, and the first clamping hole and the second clamping hole have a notch for the fixing member to enter.

8. The microporous aeration disk according to claim 7, characterized in that: An elastic sleeve is disposed on the outer sleeve of the fixing piece, and the diameter of the elastic sleeve is greater than the diameter of the notch.

9. The microporous aeration disk according to claim 7, characterized in that: A deformation groove is provided in the first clamping end and / or the second clamping end so as to enable the first clamping end and / or the second clamping end to be compressed and deformed to pass through the notch.

10. The microporous aeration disk according to any one of claims 1 to 9, characterized in that: An engaging concave-convex structure is provided between the first clamping end and the first clamping hole; and / or The second clamping end is provided with a concave-convex structure which engages with the second clamping hole.

11. The microporous aeration disk according to any one of claims 1 to 9, characterized in that: It also includes an elastic pad, which is clamped between the fixing cover and the base, and is located on the outside of the fixing member.

12. The microporous aeration disk according to claim 1, characterized in that: The fixing cover and the base have overlapping overlapping portions in the axial direction, and the first clamping hole and the second clamping hole are arranged on the overlapping portions.

13. A wastewater treatment device, characterized in that: include: A microporous aeration disk as described in any one of claims 1 to 12.

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