Edge folding type aerator

Abstract

The utility model provides an edge folding type aerator, which comprises a base, a fixed cylinder and an aeration membrane arranged between the base and the fixed cylinder, the aeration membrane comprises a planar aeration area and an edge folding area connected with the edge of the aeration area, and the edge folding area is arranged perpendicular to the aeration area; an edge folding part corresponding to the edge folding area is arranged on the edge of the base; and the edge folding area is extruded and fixed between the edge folding part and the fixed cylinder. The utility model aims to improve the sealing effect of the aerator.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a folded-edge aerator. Background Art

[0002] At present, microporous aeration discs are mostly used for aeration in sewage treatment, and the aeration diaphragms of aeration discs are mostly planar structures. For example, the diaphragm is placed horizontally during installation and is fixed to the base by a gland. In the initial state, the diaphragm is basically not subject to horizontal tension, and is easily deformed by the expansion of compressed air during the aeration process. The deformation cannot be fully restored after the aeration is stopped, resulting in a certain gap and space between the diaphragm and the supporting base, causing sewage to seep into the aeration head and shortening the equipment life.

[0003] The existing utility model patent, patent publication number CN209923033U, discloses a disc-type diaphragm microporous aerator, which includes a rubber diaphragm and a disc-shaped aeration disc frame. The rubber diaphragm is coated on the upper surface of the aeration disc frame and has a plurality of micropores. The upper surface of the aeration disc frame is a convex arched surface. A central axis for air supply is provided in the middle of the aeration disc frame. The aeration disc frame is provided with a plurality of radial grooves for connecting to the central axis and a plurality of annular air distribution grooves. The spacing between the annular air distribution grooves gradually increases from the central axis to the edge. Although the spacing of the annular air distribution grooves is adjusted to improve the aeration efficiency in the central area of ​​the aeration diaphragm, reduce the stress on the periphery of the aeration diaphragm, and prevent the aeration diaphragm from falling off, and although sealing can be achieved, under long-term vibration conditions, the threads that bear the pressure of the diaphragm for a long time are prone to loosening and falling off, ultimately affecting the sealing effect. Moreover, the problem of the aeration diaphragm deformation that cannot be fully restored cannot be avoided. Utility Model Content

[0004] The main purpose of the utility model is to provide a folded-edge aerator, aiming to solve the problem that the aerators in the prior art have poor sealing effect.

[0005] To achieve the above object, the utility model provides a folded-edge aerator, which includes a base, a fixed cylinder, and an aeration membrane arranged between the base and the fixed cylinder;

[0006] The aeration membrane comprises a planar aeration area and a folded edge area connected to the edge of the aeration area, wherein the folded edge area is arranged perpendicular to the aeration area;

[0007] The edge of the base is provided with a folded edge portion corresponding to the folded edge area;

[0008] The folding area is squeezed and fixed between the folding portion and the fixing cylinder.

[0009] Optionally, the folding area is further provided with a first compression sealing area, and the folding portion or the fixed tube is provided with a second compression sealing area corresponding to the first compression sealing area, and the inner diameter of the first compression sealing area is smaller than the outer diameter of the corresponding second compression sealing area.

[0010] Optionally, the thickness of the first compression sealing area is greater than the gap between the folded edge portion and the fixed cylinder.

[0011] Optionally, the thickness of the first compression sealing area is 2 to 10 mm, and the compression deformation range of the first compression sealing area is 0.2 to 3 mm.

[0012] Optionally, the first compression sealing area is provided with an annular anchoring area extending in the horizontal direction, and the annular anchoring area is further provided with a concave-convex compaction portion.

[0013] Optionally, the fixed cylinder is a cylindrical structure with adjustable diameter;

[0014] Alternatively, the fixed cylinder is a cylindrical structure with a fixed diameter, and the folding portion that is in contact with the outer side of the folding area or the inner surface of the fixed cylinder is provided with a corresponding tooth structure.

[0015] Optionally, the base and the edge of the fixed cylinder are further fixed by a fixing piece.

[0016] Optionally, the contact edges of the base and / or the fixing cylinder and the aeration membrane are chamfered.

[0017] Optionally, the folded edge area is arranged upward or downward perpendicular to the aeration area, and the orientation of the folded edge portion is consistent with the orientation of the corresponding folded edge area.

[0018] Optionally, a protrusion is provided on the aeration membrane, and the base is further provided with a sealing surface with air outlet holes that is in sealing contact with the protrusion.

[0019] Beneficial effects:

[0020] (1) The folded-edge aerator structure of the present invention is achieved by setting the base and the edge of the aeration membrane into folded structures with the same direction, and squeezing and fixing the aeration membrane and the base at the folded-edge structure through a fixing tube. The sealing force of the folded-edge structure is circumferential extrusion. As long as the material is not damaged, the sealing effect can be maintained. The traditional flat diaphragm is placed between the threaded gland and the base and is pressed and fixed by rotating the thread. Under long-term vibration conditions, the thread that bears the pressure of the diaphragm for a long time is prone to loosening and falling off, further affecting the sealing effect.

[0021] (2) The first compression sealing area of ​​the aeration membrane is three-way limited, which is simpler than the traditional plane seal (two-way limit), and the sealing effect is more solid.

[0022] (3) The base or the fixed tube is provided with a second compression sealing area corresponding to the first compression sealing area, and the inner diameter of the first compression sealing area is smaller than the outer diameter of the corresponding second compression sealing area, so that the aeration membrane of the folded-edge aerator is subjected to a tensile prestress during initial installation, so that the aeration membrane is slightly deformed after the aeration is completed. Based on the pre-tension before installation, the deformation of the aeration membrane after operation can be restored to the initial state in time, thereby increasing the fitting effect between the aeration membrane and the base and reducing the risk of water infiltration.

[0023] (4) Although the folding edge of the aeration membrane increases part of the membrane cost, it reduces the complexity of the aeration head structure and reduces the overall cost.

[0024] (5) The setting of the folding structure also effectively reduces the complexity of the installation and disassembly process. The edge of the diaphragm can be pressed and sealed by pressing it up and down. A corresponding tooth structure is provided on the folding part or the inner surface of the fixed cylinder that is in contact with the outer side of the folding area, which makes it easier to press in and assemble and remove without affecting the sealing effect.

[0025] (6) The folded-edge three-dimensional structure allows for a larger distribution space for air in the membrane during aeration, making the air discharge from the pores in the center and edge of the aeration area more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is a structural diagram of the first embodiment of the folded edge aerator of the present utility model;

[0028] Figure 2 This is a structural diagram of the second embodiment of the folded edge aerator of the present utility model;

[0029] Figure 3 This is a structural diagram of the third embodiment of the folded edge aerator of the present utility model;

[0030] Figure 4 This is a structural diagram of a fourth embodiment of the folded edge aerator of the present utility model;

[0031] Figure 5 for Figure 1-4 Schematic diagram of the operation of squeezing and fixing the middle folding area, the folding part and the fixing cylinder;

[0032] Figure 6 This is a structural diagram of the fifth embodiment of the folded edge aerator of the present utility model;

[0033] Figure 7 This is a structural diagram of a sixth embodiment of the folded edge aerator of the present invention;

[0034] Figure 8 for Figure 4 A schematic diagram of a further optimized portion of the structure of the embodiment;

[0035] Figure 9 This is a schematic diagram of the structure of the diameter-adjustable fixed cylinder in the folded-edge aerator of the present invention;

[0036] Figure 10 This is a structural diagram of a fixed diameter fixed cylinder in the folded edge aerator of the present invention;

[0037] Figure 11 for Figure 1-4 Schematic diagram of the structure after further optimization of the fixed cylinder;

[0038] Figure 12 for Figure 6-7 Schematic diagram of the structure after further optimization of the middle folding edge;

[0039] Figure 13 This is a schematic diagram of the structure in which the chamfered structure of the folded-edge aerator of the present invention is set as a chamfered angle;

[0040] Figure 14 This is a schematic diagram of the structure in which the chamfered structure of the folded-edge aerator of the present invention is set as an arc angle;

[0041] Figure 15 This is a schematic diagram of the structure in which the chamfer structure of the folded-edge aerator of the present invention is set as a chamfer angle + an arc angle;

[0042] Figure 16 This is a structural schematic diagram of the protrusion and the sealing surface in the folded-edge aerator of the present invention.

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0044] Description of Figure Numbers:

[0045] Label name Label name 1 base 2 Aeration membrane 3 Fixed cylinder 4 Fixings 101 Folding part 102 Sealing surface 201 Aeration area 202 Folding area 203 protrusion 2021 First compression seal area 2022 Annular anchoring area 20221 Concave and convex compaction part DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0050] like Figure 1-16 As shown, the utility model discloses an embodiment of a folded-edge aerator, wherein the folded-edge aerator includes a base 1 , a fixed cylinder 3 and an aeration membrane 2 arranged between the base 1 and the fixed cylinder 3 .

[0051] Furthermore, the aeration membrane 2 includes a planar aeration area 201 and a folded edge area 202 connected to the edge of the aeration area 201. The folded edge area 202 is arranged perpendicular to the aeration area 201. At the same time, the edge of the base 1 is provided with a folded edge portion 101 corresponding to the folded edge area 202. That is, in the same aerator, the orientation of the folded edge portion 101 is consistent with the orientation of the folded edge portion 202. The folded edge area 202 is then squeezed and fixed between the folded edge portion 101 and the fixed cylinder 3.

[0052] Furthermore, if Figure 1-7 As shown, the folding area 202 also has a first compression sealing area 2021, and the folding portion 101 or the fixed cylinder 3 is provided with a second compression sealing area corresponding to the first compression sealing area 2021. The inner diameter of the first compression sealing area 2021 is smaller than the outer diameter of the corresponding second compression sealing area, that is, when the folding portion 101 is folded downward, as shown in FIG. Figure 1-4As shown, the hemming area 202 contacts the outer surface of the hemming portion 101, the fixing cylinder 3 is located outside the hemming area 202, and the hemming area 202, the hemming portion 101 and the fixing cylinder 3 are squeezed and fixed. Figure 5 As shown, the second compression seal area is located on the hem portion 101. During actual installation, the first compression seal area 2021 of the hem portion 202 needs to be properly stretched before being assembled to the second compression seal area of ​​the hem portion 101 and then squeezed and fixed using the fixing cylinder 3. Finally, the hem portion 202 is squeezed and fixed between the hem portion 101 and the fixing cylinder 3. The first compression seal area based on the aeration membrane is three-way limited, which is simpler than traditional flat seals (two-way limited), and thus has a more secure sealing effect.

[0053] When the folding portion 101 is folded upward, Figure 6-7 As shown, the folding area 202 contacts the inner surface of the folding portion 101, the fixed cylinder 3 is located on the inner side of the folding area 202, and the second compression sealing area is located on the fixed cylinder 3. Similarly, during installation, the first compression sealing area 2021 of the folding area 202 needs to be properly stretched before it can be assembled to the second compression sealing area of ​​the fixed cylinder 3 and squeezed as a whole to the inner side of the base 1, and finally the aeration membrane 2 is efficiently fixed between the folding portion 101 and the fixed cylinder 3. Furthermore, the above arrangement not only prevents the aeration membrane 2 from falling off, but also solves the problem of the aeration membrane not being able to fully recover from deformation. The principle is that the sealing of the folded edge area is circumferential extrusion. Since the inner diameter of the first compression sealing area is slightly smaller than the outer diameter of the second compression sealing area, the first compression sealing area needs to be properly stretched before it can be assembled and fixed during assembly. In addition, there is a corresponding friction between the first compression sealing area and the second compression sealing area, thereby ensuring that the aeration membrane is subjected to a tensile pre-tension in the initial installation state. Even if the aeration is completed, the aeration membrane is slightly deformed. Based on the pre-tension before installation, the deformation of the aeration membrane after operation can be restored to its initial state in a timely manner, thereby increasing the fit between the aeration membrane and the base and reducing the risk of water infiltration. In addition, the sealing force of the folded edge structure is circumferential extrusion. As long as the material is not damaged, the sealing effect can be maintained. The traditional flat diaphragm is placed between a threaded gland and a base and is pressed and fixed by rotating the threads. Under long-term vibration conditions, the threads that bear the pressure of the diaphragm for a long time are prone to loosening and falling off, further affecting the sealing effect.

[0054] Furthermore, the thickness of the first compression sealing area 2021 is 2 to 10 mm, and the compression deformation range of the first compression sealing area 2021 is 0.2 to 3 mm.

[0055] Furthermore, in order to enhance the sealing effect between the folded edge portion 101 and the fixed cylinder 3 , the thickness of the first compression sealing area 2021 is set to be greater than the gap between the folded edge portion 101 and the fixed cylinder 3 .

[0056] Furthermore, if Figure 9 As shown, the fixing cylinder 3 is configured as a cylindrical structure with an adjustable diameter, and the fixing cylinder 3 can be used to adjust and strengthen the extrusion strength of the folding edge area 202, thereby achieving the versatility of the fixing cylinder 3.

[0057] Furthermore, if Figure 10 As shown, the fixed cylinder 3 is set as a cylindrical structure with a fixed diameter, and then fixed cylinders 3 with different diameters are set accordingly for aerators with different size requirements. Preferably, a corresponding tooth structure is provided on the folding portion 101 that is in contact with the outer side of the folding area 202 or the inner surface of the fixed cylinder 3, as shown in FIG. Figure 11 As shown, when the folding portion 101 is folded downward, the inner wall of the fixing cylinder 3 is made into a tooth structure, which can be more easily pressed into assembly and removed without affecting the sealing effect; and Figure 12 As shown, when the folding portion 101 is folded upward, the inner wall of the folding portion 101 can also be made into a tooth structure. Similarly, it can also be easier to press in and assemble and remove and separate without affecting the sealing effect.

[0058] Furthermore, the pre-tension of the aeration membrane 2 can also be achieved by fixing the edge of the membrane, as shown in the following example: Figure 4 、 6 As shown in FIG. 7 , an annular anchoring area 2022 is provided in the horizontal direction extending from the first compression sealing area 2021. Preferably, as shown in FIG. Figure 8 As shown, a concave-convex compaction portion 20221 is further provided in the annular anchoring area 2022, the purpose of which is to achieve efficient fixation of the concave-convex compaction portion 20221 and the fixing cylinder 3, thereby ensuring that the aeration membrane 2 has a stable pre-tension, which is beneficial to the subsequent deformation recovery of the aeration membrane 2 after the aeration membrane works.

[0059] Furthermore, after the hemming area 202 is squeezed and fixed between the hemming portion 101 and the fixed cylinder 3, the base 1 and the edge of the fixed cylinder 3 can be fixed by the fixing member 4, specifically as follows: Figure 3 、 4 As shown in , 6, it is achieved by bolting, clamping, hanging and other methods.

[0060] Furthermore, the contact edges of the base 1 and / or the fixing cylinder 3 and the aeration membrane 2 are configured as chamfered structures, specifically as follows: Figure 13-15 As shown, the chamfered structure is configured as a chamfered angle, a rounded angle, or a combination of the two. The chamfered angle can prevent damage to the aeration membrane during installation and reduce assembly resistance. Preferably, a liquid that does not react with the aeration membrane, such as water, can be applied to the chamfered structure area for lubrication.

[0061] Furthermore, if Figure 16As shown, based on the problem in the prior art that the aeration membrane 2 has a poor fit with the base 1 when rebounding, a protrusion 203 can be directly provided on the aeration membrane 2, and a sealing surface 102 with an air outlet is provided on the top of the air inlet channel of the base 1. After the aeration is stopped, the aeration membrane 2 covers the sealing surface 102 under the action of the pre-tension, and then completely blocks the air outlet on 102, thereby realizing a non-return function, preventing sewage outside the aeration head from flowing into the inside of the aeration head.

[0062] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or system comprising the element. The serial numbers of the above-mentioned embodiments of the present invention are for description only and do not represent the advantages and disadvantages of the embodiments.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A folded edge aerator, characterized in that: The folded-edge aerator comprises a base (1), a fixed cylinder (3), and an aeration membrane (2) arranged between the base (1) and the fixed cylinder (3); The aeration membrane (2) comprises a planar aeration area (201) and a folded edge area (202) connected to the edge of the aeration area (201), wherein the folded edge area (202) is arranged perpendicular to the aeration area (201); The edge of the base (1) is provided with a folding portion (101) corresponding to the folding area (202); The folding area (202) is squeezed and fixed between the folding portion (101) and the fixing cylinder (3).

2. The folded edge aerator according to claim 1, characterized in that: The folding area (202) is also provided with a first compression sealing area (2021), and the folding portion (101) or the fixed cylinder (3) is provided with a second compression sealing area corresponding to the first compression sealing area (2021), and the inner diameter of the first compression sealing area (2021) is smaller than the outer diameter of the corresponding second compression sealing area.

3. The folded edge aerator according to claim 2, characterized in that: The thickness of the first compression sealing area (2021) is greater than the gap between the folded edge portion (101) and the fixed cylinder (3).

4. The folded edge aerator according to claim 2, characterized in that: The thickness of the first compression sealing area (2021) is 2 to 10 mm, and the compression deformation range of the first compression sealing area (2021) is 0.2 to 3 mm.

5. The folded edge aerator according to claim 2, characterized in that: The first compression sealing area (2021) is provided with an annular anchoring area (2022) extending in the horizontal direction, and the annular anchoring area (2022) is further provided with a concave-convex compacting portion (20221).

6. The folded edge aerator according to claim 1, characterized in that: The fixed cylinder (3) is a cylindrical structure with an adjustable diameter; Alternatively, the fixed cylinder (3) is a cylindrical structure with a fixed diameter, and the folding portion (101) abutting against the outside of the folding area (202) or the inner surface of the fixed cylinder (3) is provided with a corresponding tooth structure.

7. The folded edge aerator according to claim 1, characterized in that: The base (1) and / or the edge of the fixed cylinder (3) are also fixed by a fixing member (4).

8. The folded edge aerator according to claim 1, characterized in that: The contact edges between the base (1) and / or the fixing cylinder (3) and the aeration membrane (2) are chamfered structures.

9. The folded edge aerator according to claim 1, characterized in that: The folded edge area (202) is arranged upward or downward perpendicular to the aeration area (201), and the orientation of the folded edge portion (101) is consistent with the orientation of the corresponding folded edge area (202).

10. The folded edge aerator according to any one of claims 1 to 9, characterized in that: The aeration membrane (2) is provided with a protrusion (203), and the base (1) is further provided with a sealing surface (102) with an air outlet that is in sealing contact with the protrusion (203).

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