Aeration membrane tube, hoisting type aeration system and mounting and dismounting method thereof

Abstract

The invention discloses an aeration membrane tube, a hoisting type aeration system and a mounting and dismounting method of the hoisting type aeration system. The aeration membrane tube comprises an air inlet joint, a supporting tube and a porous membrane tube, the supporting pipe is connected with the air inlet connector, the supporting pipe and the air inlet connector form an air distribution chamber, the air distribution chamber is separated from an inner cavity of the supporting pipe, and an opening for communicating the inner cavity of the supporting pipe with the outside is formed in the tail end, away from the air inlet connector, of the supporting pipe. The porous membrane tube is sleeved outside the supporting tube, at least one end of the porous membrane tube is annularly fixed through a clamp, a gap between the porous membrane tube and the side wall of the supporting tube forms an inflation space, and an air inlet communicated with the inflation space is formed in the side wall of the air distribution chamber. The buoyancy of the air cavity during aeration is counteracted by utilizing gravity, the aeration membrane tube does not need to be fixed by adopting a fixing bracket, the mounting process is simplified, the cost is reduced, the aeration membrane tube is hoisted and fixed, the relative levelness of the aeration membrane tube can be controlled at the top of the tank, the same aeration water depth and aeration uniformity are ensured, and the aeration efficiency is improved. And the aeration system can be mounted and overhauled outside the tank body.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to an aeration membrane tube, a hoisting type aeration system and an installation and removal method thereof. Background Art

[0002] As is well known, the process of sewage treatment is often accompanied by oxygenation, and the main equipment for oxygenation is an aeration disc and an aeration pipe. The aeration pipe is divided into three categories: a flexible porous pipe, a composite pipe in which the flexible porous pipe is sleeved with a rigid pipe, and a rigid perforated pipe. The first two types have a large number of openings and small holes, and the oxygen utilization rate is relatively high.

[0003] When the membrane tube containing the flexible porous pipe is aerated, the membrane tube is oppressed by the gas when filling with air, and the micropores on the rubber membrane expand automatically to oxygenate the pool. The air bubbles are cut by the micropores and become smaller, and the size of the air bubbles can be adjusted automatically with the increase or decrease of the gas volume, so as to obtain a better oxygenation effect. When the aeration stops, the aerator membrane has an automatic closing function, and the micropores on the rubber membrane will close automatically, and the sewage will not enter the aerator system. After stopping aeration for a long time, normal aeration can still be carried out.

[0004] At present, for the aeration membrane tube of the flexible porous pipe, since gas is filled in the membrane tube and an air cavity is formed in the membrane tube, the aeration membrane tube is subjected to a large buoyancy force, resulting in the floating of the aeration membrane tube. Therefore, in the prior art, generally, the aeration membrane tube is installed on the bottom of the pool body through a fixed bracket, or the aeration membrane tube is suspended through a fixed bracket. However, for the above treatment methods, on the one hand, the installation cost of the aeration membrane tube through the fixed bracket is relatively high, and at the same time, the levelness of the aeration membrane tube is not easy to adjust, resulting in uneven aeration. Summary of the Invention

[0005] Based on this, in view of the problems of high cost and uneven aeration of the existing aeration membrane tube device, it is necessary to provide an aeration membrane tube, a hoisting type aeration system and an installation and removal method thereof.

[0006] An aeration membrane tube includes:

[0007] An air inlet joint for providing gas;

[0008] A support pipe connected to the air inlet joint, the support pipe and the air inlet joint form a gas distribution chamber, the gas distribution chamber is separated from the inner cavity of the support pipe, and an opening for communicating the inner cavity of the support pipe with the outside is provided at the end of the support pipe far from the air inlet joint; and

[0009] A porous membrane tube sleeved outside the support pipe and circumferentially fixed at least at one end by a clamp, a gas filling space is formed between the porous membrane tube and the side wall of the support pipe, and an air inlet for communicating the gas filling space is provided on the side wall of the gas distribution chamber;

[0010] Among them, the overall density of the aeration membrane tube is greater than that of water to keep the gravity of the aeration membrane tube greater than the buoyancy of the aeration membrane tube.

[0011] A hoisting type aeration system includes: the aeration membrane tube as described above and an air inlet pipe, the air inlet pipe is detachably connected to the air inlet joint, and the middle part and / or both ends of the aeration membrane tube are flexibly connected to be hoisted in the pool body.

[0012] An installation method of a hoisting type aeration system is used to install the above-mentioned hoisting type aeration system in a restricted space. Both ends of the aeration membrane tube are flexibly connected. This installation method includes the following steps:

[0013] Provide the restricted space. The restricted space includes a pool body and a cover body for closing the pool body. Two groups of installation holes and an observation hole located between the two groups of installation holes are provided on the cover body;

[0014] Outside the restricted space, pass one end of an auxiliary rope into the pool body through the installation hole, then pass it out through the other installation hole, and then connect the two ends of the auxiliary rope to form an annular cable sleeve;

[0015] Fix and connect a first hoisting member on the annular cable sleeve, connect the first hoisting member to one end of the aeration membrane tube, and connect the other end of the aeration membrane tube to a second hoisting member;

[0016] Pass the hoisting members connected to the annular cable sleeve and the aeration membrane tube into the pool body through the installation hole, and rotate the annular cable sleeve to make the first hoisting member pass out through the other installation hole;

[0017] Adjust the lengths of the hoisting members at both ends of the aeration membrane tube to hoist the aeration membrane tube to a proper position in the pool body.

[0018] A removal method of a hoisting type aeration system is used to take out the above-mentioned hoisting type aeration system from a restricted space. Both ends of the aeration membrane tube are flexibly connected. This removal method includes the following steps:

[0019] Provide the restricted space. The restricted space includes a pool body and a cover body for closing the pool body. An inspection passage for operators to pass through is provided at the top of the pool body, and a slide rail extending inward beyond the side wall of the pool body is provided at the top of the pool body;

[0020] Remove the hoisting members at both ends of the aeration membrane tube from the pool body, and rotate the aeration membrane tube horizontally to narrow the projection of the aeration membrane tube and the hoisting members in an installation direction;

[0021] Lift the hoisting members at both ends of the aeration membrane tube and hang the hoisting members on the slide rail;

[0022] Slide the hoisting member to slide the aeration membrane tube towards the reserved hole of the pool body, and finally take out the aeration membrane tube through the inspection hole.

[0023] The above-mentioned aeration membrane tube, hoisting type aeration system and its installation and removal method have at least the following advantages:

[0024] 1. Utilize gravity to offset the buoyancy of the air cavity during aeration, avoiding the floating of the aeration membrane tube. The aeration membrane tube does not need to be fixed with a fixed bracket, simplifying the installation process and reducing costs.

[0025] 2. The ports of the aeration membrane tube are elevated, which is conducive to quickly discharging the gas in the support tube under different working conditions, compensating for the resistance loss in the air distribution pipe, making the air output more uniform at different distances of the porous membrane tube, ensuring the balance of the aeration effect, being able to exclude external force interference during the working process, easily returning to the vertical state at the balance point, and increasing the stability of the system.

[0026] 3. An expansion limit structure is designed outside the porous membrane tube to limit the maximum volume of the porous membrane tube, ensuring that the gravity of the system is greater than the buoyancy, so that it can work stably at the bottom of the pool body.

[0027] 4. At least one protruding part protruding outward is provided on the side wall of the support tube, and the internal and external pressure difference of the porous membrane tube is greatly reduced during operation, and the buoyancy received by the equipment during the working state is further reduced, making the working conditions of the system more stable.

[0028] 5. The aeration membrane tube is hoisted and fixed, and the levelness of the sling can be controlled at the top of the pool to achieve precise adjustment of the levelness of the aeration membrane tube. It is simple and easy to implement in the upper free space, ensuring uniform aeration. The aeration system can be installed and maintained outside the pool body without emptying the pool body, saving the maintenance time and shutdown costs of production enterprises.

[0029] 6. The hoisting type aeration system can be disassembled and assembled in a restricted space, and is suitable for installing aeration equipment in a covered pool body without entering the pool for water operation, improving the application range of the hoisting type aeration membrane tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 are not necessarily drawn according to the actual ratio.

[0031] Figure 1 It is a schematic structural diagram of an aeration membrane tube in one embodiment;

[0032] Figure 2 It is a schematic structural diagram of an aeration membrane tube in another embodiment;

[0033] Figure 3 is Figure 1 Schematic diagram of the detachable connection between the middle air chamber plug and the support pipe;

[0034] Figure 4 Schematic diagram of the support pipe being a split structure in one embodiment;

[0035] Figure 5 Schematic diagram of the support pipe being a split structure in another embodiment;

[0036] Figure 6 Schematic diagram of the intake joint being connected to the end of the support pipe in one embodiment;

[0037] Figure 7 Schematic diagram of the intake joint being connected to the end of the support pipe in another embodiment;

[0038] Figure 8 Schematic diagram of the elevated design of the port of the aeration membrane tube;

[0039] Figure 9 Schematic diagram of the expansion limit structure designed outside the aeration membrane tube;

[0040] Figure 10 Schematic diagram of the aeration comparison between the circular support pipe and the square support pipe;

[0041] Figure 11 Schematic diagram of the support pipe being polygonal;

[0042] Figure 12 Partial cross-sectional view of the support pipe being two rectangular pipes;

[0043] Figure 13 Schematic diagram of the hoisting type aeration system in one embodiment;

[0044] Figure 14 Schematic diagram of the hoisting type aeration system in another embodiment;

[0045] Figure 15 Schematic diagram of multiple groups of hoisting type aeration systems being connected in series;

[0046] Figure 16 Schematic diagram of the sling ropes being installed crosswise at both ends of the aeration membrane tube;

[0047] Figure 17 Flow chart of the installation method of the hoisting type aeration system in one embodiment;

[0048] Figure 18 Schematic diagram of the auxiliary rope passing through the installation hole;

[0049] Figure 19 Schematic diagram of the auxiliary rope passing through another installation hole and being connected into a looped cable sleeve;

[0050] Figure 20 Schematic diagram of the connection between the lifting component and the annular cable sleeve;

[0051] Figure 21 Schematic diagram of the sling and the aeration membrane tube passing through the installation hole into the pool body;

[0052] Figure 22 Schematic diagram of the air inlet pipe at the end of the aeration membrane tube passing through the installation hole;

[0053] Figure 23 Schematic diagram of both ends of the aeration membrane tube being hoisted in the pool body through the air inlet pipe and the sling;

[0054] Figure 24 Schematic diagram of both ends of the aeration membrane tube being hoisted in the pool body through two slings;

[0055] Figure 25 Flow chart of the removal method of the hoisting type aeration system in one embodiment;

[0056] Figure 26 Schematic diagram of the projection width of the gantry formed by the aeration membrane tube and the lifting component becoming narrower during rotation in one installation direction;

[0057] Figure 27 Schematic diagram of the air inlet pipe and the sling being tied together, and a counterweight block being designed for the sling on the other side.

[0058] Reference numerals:

[0059] 10 - Aeration membrane tube, 11 - Air inlet joint, 111 - Horizontally extending part, 12 - Support tube, 121 - Air inlet end, 122 - Open end, 123 - Protruding part, 13 - Porous membrane tube, 14 - Air distribution chamber, 141 - Air chamber plug, 142 - Air inlet, 143 - Sealing ring, 144 - Connecting piece, 145 - Fixing hole, 146 - Plug pin, 15 - Clamp, 16 - Inflation space, 17 - Fitting washer, 18 - Compression cover, 19 - Auxiliary connection cylinder, 21 - Spiral reinforcing strip, 22 - Spiral wire sleeve, 30 - Air inlet pipe, 40 - Sling, 41 - Lifting component, 42 - Intermediate connecting piece, 50 - Restricted space, 51 - Pool body, 52 - Cover body, 521 - Installation hole, 522 - Observation hole, 53 - Inspection passage, 54 - Slide rail, 60 - Annular cable sleeve, 70 - Auxiliary hook rod, 80 - Counterweight block. Detailed implementation manners

[0060] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following provides a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention 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 invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0061] 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.

[0062] 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 invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0063] Please refer to Figure 1 , the aeration membrane tube 10 in one embodiment is used for aeration and oxygenation in sewage treatment. Specifically, the aeration membrane tube 10 includes an air inlet joint 11, a support tube 12, and a porous membrane tube 13.

[0064] The air inlet joint 11 is used to provide gas. The support tube 12 is connected to the air inlet joint 11. The support tube 12 and the air inlet joint 11 form a gas distribution chamber 14, and the gas distribution chamber 14 is separated from the inner cavity of the support tube 12. An opening for communicating the inner cavity of the support tube 12 with the outside is provided at the end of the support tube 12 far from the air inlet joint 11. The porous membrane tube 13 is sleeved outside the support tube 12 and at least one end is circumferentially fixed by a clamp 15. The gap between the porous membrane tube 13 and the side of the support tube 12 forms an inflation space 16, and an air inlet 142 communicating with the inflation space 16 is provided on the side wall of the gas distribution chamber 14. The overall density of the aeration membrane tube 10 is greater than that of water to keep the gravity of the aeration membrane tube 10 greater than the buoyancy of the aeration membrane tube 10.

[0065] For the above-mentioned aeration membrane tube 10, after the aeration membrane tube 10 is arranged in the pool body, the water in the pool body can enter the inner cavity of the support tube 12 through the opening of the support tube 12, and the air bubbles in the support tube 12 can be discharged smoothly, reducing the buoyancy exerted on the pipeline in the water. Therefore, during the aeration process of the aeration membrane tube 10, the air cavity is only the air distribution chamber 14 and the inflation space 16. The buoyancy generated by the relatively small volumes of the air distribution chamber 14 and the inflation space 16 is relatively small, greatly reducing the influence of the buoyancy on the aeration membrane tube 10. It is relatively easy to offset the buoyancy of the air cavity during aeration with gravity. Therefore, the overall density of the aeration membrane tube 10 can be made greater than that of water, keeping the gravity of the aeration membrane tube 10 greater than the buoyancy of the aeration membrane tube 10, and preventing the aeration membrane tube 10 from floating. The aeration membrane tube 10 does not need to be fixed with a fixed support, simplifying the installation process and reducing costs.

[0066] In one embodiment, the density of the support tube 12 is greater than that of water, so that the overall density of the aeration membrane tube 10 is greater than that of water. Specifically, part or all of the support tube 12 is made of metal. For example, the material of the support tube 12 can be stainless steel, a steel pipe with internal and external anti-corrosion, a PSP steel-plastic composite pipe, etc. The process of internal and external anti-corrosion of the steel pipe can be spraying, coating, or dipping, etc. In one embodiment, the support tube 12 may not be made of a metal material either. The support tube 12 can also be made of plastic, and a counterweight with a density greater than that of water can be designed inside the support tube 12 to make the overall density of the aeration membrane tube 10 greater than that of water. Specifically, the counterweight can be a stone, a concrete block, an iron block, etc.

[0067] In one embodiment, the clamp 15 can be a stainless steel clamp, or the clamp 15 can also be a plastic clamp, etc., as long as it can fix the porous membrane tube 13 circumferentially on the support tube 12 to prevent the gas in the inflation space 16 from escaping.

[0068] In one embodiment, the air distribution chamber 14 includes an air chamber plug 141. The air chamber plug 141 is used to separate the air distribution chamber 14 from the inner cavity of the support tube 12. The air chamber plug 141 and the inner wall of the support tube 12 and / or the inner wall of the air inlet joint 11 enclose the air distribution chamber 14. The air inlet 142 is located on the side of the air chamber plug 141 close to the air inlet joint 11. The air inlet joint 11 can be connected to the middle of the support tube 12, or the air inlet joint 11 can also be connected to the end of the support tube 12. Among them, when the air inlet joint 11 is connected to the middle of the support tube 12, the support tube 12 can be a whole structure, or the support tube 12 can also be separated into two segments at the air inlet joint 11.

[0069] Please refer to Figure 2In one embodiment, a connection hole is provided in the middle of the support tube 12 and the porous membrane tube 13 for the air inlet connector 11 to penetrate, and a matching gasket 17 is provided on the air inlet connector 11 to press the porous membrane tube 13 around the connection hole onto the support tube 12. When the outer surface of the support tube 12 is arc-shaped, the matching gasket 17 is saddle-shaped, and the membrane tube is designed to be connected and fixed as a whole, with high fixing strength, and the porous membrane tube 13 is pressed in the middle and will not move to the sides.

[0070] In one embodiment, the connection hole can be selected to pass through the entire support tube 12, or the connection hole can only pass through the side wall of one side of the support tube 12. When the connection hole passes through the entire support tube 12, the air inlet connector 11 passes through the support tube 12, so both ends of the air inlet connector 11 located on the support tube 12 are sleeved with anastomotic gaskets 17, and both ends of the air inlet connector 11 located on the support tube 12 are threadedly connected to glands 18, and the glands 18 press and fix the anastomotic gaskets 17, so that the anastomotic gaskets 17 press the porous membrane tube 13 around the connection hole onto the support tube 12.

[0071] like Figure 2 As shown, when the connection hole only penetrates the side wall of one side of the support tube 12, in order to realize the connection between the air intake connector 11 and the support tube 12, an auxiliary connection tube 19 needs to be installed on the side wall of the connection hole, and the inner wall of the auxiliary connection tube 19 is provided with an internal thread, and the air intake connector 11 is threadedly connected in the auxiliary connection tube 19. An anastomotic gasket 17 is sleeved on the air intake connector 11, and the anastomotic gasket 17 is pressed and fixed by a gland 18 threadedly connected on the air intake connector 11, so that the anastomotic gasket 17 presses the porous membrane tube 13 around the connection hole onto the support tube 12.

[0072] In one embodiment, when the support tube 12 is an integral structure, the air chamber plug 141 is installed in the support tube 12, and the support tube 12, the air chamber plug 141 and the air inlet joint 11 together form an air distribution chamber 14, and the air inlet 142 is opened on the support tube 12. In one embodiment, the air chamber plug 141 can be welded, bonded or hot-melted in the support tube 12. Of course, the air chamber plug 141 can also be detachably connected in the support tube 12, which is convenient for disassembly and maintenance of the air chamber plug 141.

[0073] Please also read Figure 3, specifically, a sealing ring 143 is provided on the periphery of the air chamber plug 141. The sealing ring 143 seals the gap between the air chamber plug 141 and the inner wall of the support tube 12. At the same time, the sealing ring 143 can deform so that the air chamber plug 141 can slide and adjust its position in the support tube 12 under the action of an external force. A connecting member 144 is provided on the side of the air chamber plug 141 close to the air distribution chamber 14. A fixing hole 145 is provided on the side wall of the support tube 12. A pin 146 is provided in the fixing hole 145, and the pin 146 is inserted into the hole of the connecting member 144 to fix the position of the air chamber plug 141. Since the fixing hole 145 is located on the side of the air chamber plug 141 close to the air distribution chamber 14, the gas in the air distribution chamber 14 enters the inflation space 16 through the fixing hole 145, and the gas does not enter the inner cavity of the support tube 12.

[0074] Please refer to Figure 4 and Figure 5 , in an embodiment, when the support tube 12 is a split structure, the support tube 12 includes two segments. The two segments of the support tube 12 are respectively connected to the intake joint 11. The end of the porous membrane tube 13 is circumferentially fixed to the support tube 12 by a clamp 15. Specifically, the intake joint 11 is similar to a tee structure, or the intake joint 11 is formed by secondary processing of a tee. The intake joint 11 has two laterally extending portions 111. The two segments of the support tube 12 are respectively connected to the two laterally extending portions 111 of the intake joint 11, and the connection method can be socket connection or welding, etc. The air chamber plug 141 can be installed in the support tube 12, and the air chamber plug 141 can also be installed in the laterally extending portion 111 of the intake joint 11. The air chamber plug 141 can be welded, adhered or heat-melted and connected in the support tube 12 or the intake joint 11, and the air chamber plug 141 can also be integrally formed with the support tube 12 or the intake joint 11. The air inlet 142 can be opened on the support tube 12, and the air inlet 142 can also be opened on the laterally extending portion 111.

[0075] Please refer to together Figure 6 and Figure 7 , in an embodiment, when the intake joint 11 is connected to the end of the support tube 12, both ends of the porous membrane tube 13 are circumferentially fixed to the support tube 12 by a clamp 15. Among them, the connection method between the intake joint 11 and the support tube 12 can be socket connection, can also be welding, and even the intake joint 11 and the support tube 12 can be integrally formed. The air chamber plug 141 can be optionally installed in the support tube 12, and the air chamber plug 141 can also be optionally installed in the intake joint 11.

[0076] Please refer to together Figure 8, in one embodiment, the support pipe 12 includes an air inlet end 121 connected to the air inlet joint 11 and an open end 122 far from the air inlet joint 11, and the open end 122 is arranged higher than the air inlet end 121. When the diameter of the support pipe 12 is small, under the action of gravity, the bending and curvature of the thin-diameter and long rod when suspended at both ends can meet the requirement of raising the open end 122 of the support pipe 12. When the diameter of the support pipe 12 is large and the rod is short, that is, the bending resistance is large, the support pipe 12 is bent or inclinedly connected through pretreatment to raise the open end 122.

[0077] Among them, since there is an opening at the end of the support pipe 12, the sewage in the pool will enter the support pipe 12, and gas will be generated by the sludge in the support pipe 12. In order to improve the exhaust effect of the open end 122 of the support pipe 12 and prevent the gas generated by the sludge in the pipe from being unable to be discharged normally, it is designed to raise the port of the support pipe 12 farther from the air inlet joint 11, which is beneficial to quickly discharge the gas appearing in the support pipe 12 under different working conditions.

[0078] At the same time, raising the open end 122 can compensate for the resistance loss in the air distribution pipe process, make the air output at the near and far ends of the porous membrane tube 13 more uniform, and ensure the balance of the aeration effect. Because as the gas is transported in the narrow gaps of the porous membrane tube 13, due to the resistance of the gas contacting the inner wall, the gas pressure gradually decreases, and the water depth in the distance becomes shallower, just compensating for the resistance loss. Finally, for the scenario where the support pipe 12 intakes air in the middle, the air inlet end 121 of the support pipe 12 is low and the open end 122 is high, which makes the center of gravity of the entire aeration membrane tube 10 move downward. Similar to the pendulum effect, it can eliminate external interference during the working process and easily return to the vertical state of the balance point, increasing the stability of the system.

[0079] During the initial working process of the traditional membrane tube, the resistance of the membrane pores is often small. After the rubber is inflated and deformed slightly by the injection of compressed air, the volume of the cavity in the aeration membrane tube 10 is small at this time, and the buoyancy force received by the aeration system is less than the gravity of the system, so it can work safely at the bottom of the pool. As the air outlet holes become fouled or blocked, the air output capacity of the membrane tube gradually decreases. At this time, the pressure difference (transmembrane pressure difference) on both sides of the rubber membrane rises sharply, causing the membrane tube to expand and deform (due to considering the resistance of the bubbles passing through the membrane, the thickness of the membrane is generally 1.5 - 2 mm), and finally resulting in the out-of-control floating of the aeration membrane tube 10 system to the water surface.

[0080] Such as Figure 9As shown, in one embodiment, the porous membrane tube 13 is designed with an expansion limiting structure, which enables the porous membrane tube 13 to reduce the expansion deformation under working conditions without affecting gas flow. Specifically, a spiral reinforcing strip 21 extending along the axial direction thereof is provided inside the porous membrane tube 13; and / or a spiral wire sleeve 22 is arranged outside the porous membrane tube 13, and there is a gap between the spiral wire sleeve 22 and the porous membrane tube 13. That is to say, the porous membrane tube 13 can be designed with the spiral reinforcing strip 21 alone inside it, or the spiral wire sleeve 22 alone outside it, or the porous membrane tube 13 can be designed with both the spiral reinforcing strip 21 and the spiral wire sleeve 22 at the same time.

[0081] Among them, the spiral reinforcing strip 21 is integrally formed during the production process of the porous membrane tube 13, but this structure brings certain difficulties to the opening of the porous membrane tube 13 and the sealing between the porous membrane tube 13 and the support tube 12. The spiral wire sleeve 22 can also be designed outside the porous membrane tube 13. The two ends of the spiral wire sleeve 22 can be connected to the ends of the support tube 12, or can be connected to the clamps 15 at both ends of the support tube 12. The inner diameter of the spiral wire sleeve 22 is the same as the maximum expansion outer diameter of the porous membrane tube 13. Generally, the gap between the inner side of the wire sleeve and the outer surface of the porous membrane tube 13 after production is 2-12 mm, that is, the inner diameter of the wire sleeve is 4-24 mm larger than the production outer diameter of the porous membrane tube 13. This structure neither hinders the normal release of bubbles nor has a self-cleaning function. Under adverse factors such as membrane tube blockage, large air flow rate, and rubber aging and deformation, it can limit the maximum volume of the porous membrane tube 13, ensure that the gravity of the system is greater than the buoyancy, so as to stably work at the bottom of the pool.

[0082] Please refer to Figure 10 , in one embodiment, to increase the mass transfer efficiency, at least one protruding portion 123 protruding outward is provided on the side wall of the support tube 12, and the protruding portion 123 presses against the porous membrane tube 13, making the surface curvature of the porous membrane tube 13 smaller and closer to a plane, so that the force on the porous membrane tube 13 is uneven and the transmembrane resistance of the porous membrane tube 13 is reduced. After testing, under the same working conditions, this structure can increase the effective oxygen supply capacity per degree of electricity from 2 kg to more than 2.4 kg. The main reasons are as follows:

[0083] For the same material membrane sheets with the same thickness, passing through holes of the same size and the same hole density, engineering data shows that the transmembrane resistance of a circular structure is at least 5000 Pa, while the transmembrane resistance of a planar structure is only about 2000 Pa. The main reason for this phenomenon is that the circular structure is pressure-resistant. A pressure of 2000 Pa can cause the gas in the planar structure to drill out from the small holes, while after the pressure is increased by more than one time, the gas can only escape from the expanded small holes around the circle after the circular tube expands as a whole. At this time, part of the energy consumption loss is wasted on excessive transmembrane resistance, and part of the loss is due to the decrease in mass transfer capacity after the bubbles become larger.

[0084] Please refer to togetherFigure 11 , in one embodiment, the support tube 12 is polygonal, and the corners of the polygon form the protrusions 123 of the support tube 12. Due to the support of each corner, the surface curvature of the membrane tube between two corners becomes smaller and is closer to a plane. After being supported by the polygon, the internal and external pressure difference of the porous membrane tube 13 during operation is greatly reduced. Because the relative air pressure inside the membrane decreases, the expansion deformation amount of the inflation space 16 between the membrane and the support tube 12 is also controlled. Therefore, the buoyancy force received during the operation of the device is further reduced, making the working conditions of the system more stable. Moreover, it is more convenient to connect the air inlet joint 11 to the polygonal support tube 12. An opening can be made on one surface of the polygon for connection. In addition, it is easier to achieve sealing at the interface on the plane. A flat gasket seal can be used for pressing, while the circular support tube 12 is the intersection of two circular cylinders, and a saddle-shaped seal ring needs to be designed for fitting and sealing.

[0085] Specifically, the shape of the support tube 12 can be triangular, square, pentagonal, hexagonal, etc. The space between two adjacent corners of the support tube 12 can be a plane or can be recessed inward to increase the volume of the inflation space 16, that is, the support tube 12 is a special-shaped structure.

[0086] It should be noted that the support tube 12 is a polygonal structure. The disadvantage of this structure is that the higher it is in the vertical direction, the stronger its bending resistance and the larger the installation span. However, the projected area of the air outlet area on the plane becomes narrower. If it becomes larger in the horizontal direction, the bending resistance decreases, but the plane projection is large and the air outlet area increases. In order to balance the aeration area and the bending strength, the material of the support tube 12 may be consumed more than that of the round tube. As Figure 12 shown, therefore, two rectangular tubes can be arranged in parallel at a certain interval as the support tube 12, and the middle part is filled with materials at the ends of the two rectangular tubes to meet the sealing requirements of the porous membrane tube 13 at the ends. In this case, the middle part of the two rectangular tubes also has the effect of fully filling the inflation space 16, and in a certain sense, the fluid resistance is more optimized than that under the circular support condition. Because when the circular membrane sleeve is on the circular support tube 12, the porous membrane will vibrate when the air flows through, generating greater resistance.

[0087] The above-mentioned aeration membrane tube 10 takes advantage of gravity being greater than buoyancy to avoid the floating of the aeration membrane tube 10. The structural design of the aeration membrane tube 10 is optimized, greatly reducing the components of the original single membrane tube aeration system. For example, a 3-6m long aeration membrane tube 10 only has 2 clamps 15 (while for a 1m long one in the prior art, there are 2 seals); in the prior art, the membrane tube and the aeration main pipe must be independently manufactured and installed with threaded connections to each other (which are prone to loosening and falling off), while in this application, a support pipe 12 is used with holes drilled through for connection; in the original structure, the air distribution chamber 14 and the support pipe 12 must be bonded or welded, and cannot be disassembled and repaired after problems occur in the equipment, while the new design can be easily disassembled and replaced, greatly improving the reliability and maintenance efficiency of the system. In addition, the new design also reduces the risk of air leakage in the system by reducing the connection points. The outer contour diameters of several common specifications of the aeration membrane tube 10 are between 50-150mm, and it can be applicable to the water-carrying operation of aeration in a tank body containing biological fillers (generally, the contact oxidation biological fillers are tied to parallel steel bars, the spacing of the steel bars is usually 150-250mm, and the length of a single steel bar is generally 2.5-5m, and it can be installed in a sunken manner in the gap). Using a pipe containing partial or all metals as the support pipe 12 solves the material defects in the traditional membrane tube aeration system (traditionally made of polymer materials such as PE and UPVC), enabling the maximum length of a single aeration pipe membrane tube to reach 3-6m from about 1m in the traditional case, increasing the service area of a single pipe to 3-6 times the original, and greatly reducing the number of inlet pipes 30 and the installation workload. The aeration membrane tube 10 can be flexibly hoisted and installed without relying on external weights, and the levelness of the aeration membrane tube 10 is easy to adjust, which can ensure uniform aeration.

[0088] Please refer to Figure 13 , the present invention also provides a hoisting type aeration system, including the above-mentioned aeration membrane tube 10 and an inlet pipe 30, and the inlet pipe 30 is detachably connected to an air inlet joint 11. The middle part and / or both ends of the aeration membrane tube 10 are flexibly connected to be hoisted in the tank body. That is to say, the middle part of the aeration membrane tube 10 can be flexibly connected to be hoisted in the tank body, or both ends of the aeration membrane tube 10 can be flexibly connected to be hoisted in the tank body, or both the middle part and both ends of the aeration membrane tube 10 are flexibly connected to be hoisted in the tank body.

[0089] Among them, regarding the implementation methods of flexible connection, it includes a rigid rod-shaped structure with a length-to-diameter ratio greater than 80, a rigid rod-shaped structure with a soft joint, a cable structure (such as multi-strand steel wire ropes, nylon ropes, etc.), a chain structure, a composite hose, and a combined structure of the above several basic shapes, such as a chain-rod combination, a cable-rod combination, etc. The rigid rod-shaped structure with a length-to-diameter ratio greater than 80, the rigid rod with a soft joint, and the composite hose can both act as the inlet pipe and the suspension structure.

[0090] The above-mentioned hoisting type aeration system is hoisted in the pool body by using gravity greater than buoyancy (the weight of the whole set of membrane tubes is only dozens of kilograms, and the buoyancy received in the working state is only more than a dozen kilograms), reducing the number of fixed frames of the aeration system, simplifying the installation process and reducing the maintenance cost. Since the aeration membrane tube 10 is hoisted and fixed, the relative levelness between the fixed ends of the tops of multiple suspension ropes can be controlled at the pool top, ensuring the same aeration water depth and the uniformity of aeration, realizing precise adjustment of the levelness of the aeration membrane tube 10, which is simple and easy to implement in the upper free space, and avoiding the workload of individually adjusting the elevation of a large number of brackets at the pool bottom due to the uneven bottom plate of the traditional aeration system installed at the pool bottom. For the multi-compartment pool body of the traditional aeration tank, leveling the elevation of the aeration brackets between different compartments is a very challenging task with large errors. Therefore, the same set of aeration system after installation will also show uneven aeration due to different underwater depths of aeration in different pool bodies. The aeration system can be installed and maintained outside the pool body without emptying the pool body, saving the maintenance time and production suspension cost of the production enterprise.

[0091] Please refer to Figure 13 and Figure 14 , in one embodiment, the aeration membrane tube 10 is hoisted and fixed by using the air inlet pipe 30 and / or the suspension rope 40. Specifically, the air inlet pipe 30 can be connected to the middle part of the aeration membrane tube 10 to achieve hoisting and fixing. Or, both ends of the aeration membrane tube 10 can be flexibly connected by the suspension rope 40, and the air inlet pipe 30 is connected to the middle part of the aeration membrane tube 10, and the air inlet pipe 30 is not stressed at this time. Or, both ends of the aeration membrane tube 10 are respectively flexibly connected by the air inlet pipe 30 and the suspension rope 40.

[0092] Preferably, the aeration membrane tube 10 adopts a flexible connection method at both ends, which can precisely control the levelness and elevation of the aeration membrane tube 10, as well as the balance stability of the aeration system. For the scenario where the air inlet pipe 30 participates in flexible hoisting, the flexible joints of the pipeline may be damaged due to long-term stress. At this time, parallel cables can be arranged along the air inlet pipe 30 to compensate for the tension received by the air inlet pipe 30, and the suspension rope is more flexible in terms of height adjustment.

[0093] In one embodiment, when the middle and lower parts of the air inlet pipe 30 are flexibly connected to the aeration membrane tube 10 for hoisting, ropes can be used to connect both ends of the aeration membrane tube 10 to the middle air inlet pipe 30 at this time. This connection method can prevent the aeration membrane tube 10 from being affected by nearby aeration bubbles and water flow and appearing in an unbalanced state such as rotation in different horizontal and vertical directions.

[0094] Please refer to Figure 15, in one embodiment, when the width of the pool body is large, in order to avoid the overlong size of the aeration membrane tube 10 resulting in great processing difficulty, multiple sets of the hoisting type aeration system are designed at this time, and two adjacent aeration membrane tubes 10 are connected in series through an intermediate connector 42. Among them, the intermediate connector 42 is provided with exhaust holes, and the gas in the support tube 12 is discharged through the exhaust holes.

[0095] Please refer to Figure 16 , in one embodiment, when the two ends of the aeration membrane tube 10 are flexibly connected by slings 40, two slings 40 can be connected to the end of the aeration membrane tube 10, and the two slings 40 cross at a certain angle, which can also avoid unbalanced states such as rotation and large swing in different horizontal and vertical directions.

[0096] In one embodiment, when the two ends of the aeration membrane tube 10 are flexibly connected and the installation method of hoisting at both ends is adopted, the slings 40 on both sides and the aeration membrane tube 10 form an inverted door-shaped frame. This structure is suitable for the installation and maintenance requirements of various restricted spaces. Since the two ends of the aeration membrane tube 10 can be hoisted by two slings 40, or the slings 40 can cooperate with the air inlet pipe 30 for hoisting, for the sake of easy understanding, the slings 40 and the air inlet pipe 30 are collectively referred to as the hoisting members 41.

[0097] Please refer to Figure 17 and Figure 18 , the present invention also provides an installation method of the hoisting type aeration system for installing the above-mentioned aeration system hoisted at both ends in a restricted space 50. Specifically, the installation method includes the following steps:

[0098] Step S110: Provide a restricted space 50, which includes a pool body 51 and a cover body 52 for closing the pool body 51. The cover body 52 is provided with two sets of installation holes 521 and an observation hole 522 located between the two sets of installation holes 521.

[0099] Specifically, the cover body 52 is a structural cover plate, which is a part of the pool body 51 and has a large load, and people can stand on it. The distance between the two sets of installation holes 521 should correspond to the hoisting positions at both ends of the aeration membrane tube 10. The observation hole 522 is used to observe the installation situation of the aeration membrane tube 10 in the pool body 51, and the air inlet pipe 30 and the aeration membrane tube 10 can be installed through the observation hole 522.

[0100] Among them, when considering subsequent installation of aeration equipment before the construction of the pool body 51, two sets of installation holes 521 and an observation hole 522 can be reserved. When considering installing aeration equipment after the construction of the pool body 51, two sets of installation holes 521 and an observation hole 522 can be opened on the cover body 52 with tools on the premise of pool ventilation (to prevent explosion of anaerobic gases).

[0101] Step S120: Outside the confined space 50, pass one end of the auxiliary rope through the mounting hole 521 into the pool body 51, then pass it out through another mounting hole 521, and then connect the two ends of the auxiliary rope to form a looped cable sleeve 60.

[0102] Please also refer to Figure 19 , specifically, for the case where the subsequent installation of the aeration equipment is considered before the construction of the pool body 51, the installation of the auxiliary rope is relatively convenient at this time. Pass the auxiliary rope into one mounting hole 521, then pass it out from another mounting hole 521, and connect the two ends of the auxiliary rope to form a looped cable sleeve 60.

[0103] For the case where the installation of the aeration equipment is considered after the construction of the pool body 51, the auxiliary hook rod 70 can be inserted through the observation hole 522. After one end of the auxiliary rope is passed into the mounting hole 521, the auxiliary hook rod 70 hooks the auxiliary rope and sends the auxiliary rope to the lower part of another mounting hole 521, and then the external operator passes the auxiliary rope out from the mounting hole 521, and finally connects the two ends of the auxiliary rope to form a looped cable sleeve 60.

[0104] Step S130: Fix and connect the first lifting member 41 on the looped cable sleeve 60, connect the first lifting member 41 to one end of the aeration membrane tube 10, and connect the other end of the aeration membrane tube 10 to the second lifting member 41.

[0105] Please also refer to Figure 20 , specifically, after the looped cable sleeve 60 is installed, fix and connect the first lifting member 41 on the looped cable sleeve 60, and connect the first lifting member 41 to one end of the aeration membrane tube 10, and connect the other end of the aeration membrane tube 10 to the second lifting member 41.

[0106] In one embodiment, in order to facilitate the penetration of the aeration membrane tube 10 into the pool body 51 through the mounting hole 521 and the penetration of the lifting member 41 out of the mounting hole 521. The first lifting member 41 fixedly connected to the looped cable sleeve 60 is preferably a sling 40, and the second lifting member 41 connected to the other end of the aeration membrane tube 10 is a sling 40 or the air inlet pipe 30.

[0107] Step S140: Pass the lifting member 41 and the aeration membrane tube 10 connected to the looped cable sleeve 60 into the pool body 51 through the mounting hole 521, and rotate the looped cable sleeve 60 to make the first lifting member 41 pass out through another mounting hole 521.

[0108] Please also refer to Figure 21 and Figure 22, specifically, first pass the sling 40 through the installation hole 521 into the tank body 51, and then also pass the aeration membrane tube 10 through the installation hole 521 into the tank body 51. At this time, even if the intake pipe 30 is connected to the end of the aeration membrane tube 10, since the intake pipe 30 and the aeration membrane tube 10 are flexibly connected (or the size of the installation hole 521 meets the insertion of the hard connection of the intake pipe 30 and the aeration membrane tube 10), the aeration membrane tube 10 can pass through the installation hole 521. Temporarily suspend the aeration membrane tube 10 by the second lifting member 41 at the other end of the aeration membrane tube 10, rotate the annular cable sleeve 60, and convey the previously entered sling 40 to the lower part of another installation hole 521. The operator on the cover body 52 passes the sling 40 through the installation hole 521 and out of the installation hole 521.

[0109] Step S150: Adjust the lengths of the lifting members 41 at both ends of the aeration membrane tube 10 to lift the aeration membrane tube 10 to a suitable position in the tank body 51.

[0110] Please refer to Figure 23 specifically, control the lengths of the lifting members 41 at both ends of the aeration membrane tube 10, and then observe the quality of the aeration effect. After the position where the aeration membrane tube 10 is lifted is determined, fix the lifting members 41 on the cover body 52 to realize lifting the aeration membrane tube 10 to a suitable position in the tank body 51. During the process of removing and repairing the aeration membrane tube 10 from the above-mentioned restricted space 50, it is the reverse process of the above process and will not be elaborated.

[0111] Please refer to Figure 24 In an embodiment, when both ends of the aeration membrane tube 10 are lifted by the sling 40, at this time, the intake pipe 30 and the aeration membrane tube 10 can be pre-separated. After the aeration membrane tube 10 is installed in the tank body 51, lift the aeration membrane tube 10 upward so that the air inlet joint 11 of the aeration membrane tube 10 is located below the observation hole 522, and then detachably connect the intake pipe 30 and the air inlet joint 11, such as by means of threading, flanging or socket pressing, etc., to realize the connection between the intake pipe 30 and the aeration membrane tube 10.

[0112] Please refer to Figure 25 and Figure 26 , the present invention also provides a removal method for a lifting type aeration system, which is used to take out the above-mentioned aeration system lifted at both ends from the restricted space 50. Specifically, the removal method includes the following steps:

[0113] Step S210: Provide a restricted space 50, the restricted space 50 includes a tank body 51 and a cover body 52 for closing the tank body 51. The top of the tank body 51 is provided with an inspection passage 53 for operators to pass through, and the top of the tank body 51 is provided with a slide rail 54 extending inward beyond the side wall of the tank body 51.

[0114] Specifically, for the structural open pond body 51, since gas collection inside the pond is considered, a cover plate is added later. There is generally a passage for people to enter and perform maintenance between the added cover plate and the main body of the pond body 51. To reduce the weight of the cover plate, an arched cover plate or an external steel keel combined with an inverted inner membrane structure is generally used. The pond body 51 with the added cover plate later generally cannot have too large a load, that is, people cannot stand on the top. Before the aeration membrane tubes 10 hoisted at both ends are removed and moved out, 2 slide rails 54 should be preset along the inner side above the hoisting position in the moving-out direction. The 2 slide rails 54 should extend inward beyond the inner wall of the pond body 51.

[0115] Step S220: Remove the hoisting members 41 at both ends of the aeration membrane tube 10 from the pond body 51, and rotate the aeration membrane tube 10 in the horizontal plane so that the projection of the aeration membrane tube 10 and the hoisting member 41 in an installation direction becomes narrower.

[0116] Specifically, remove the hoisting member 41 of the aeration membrane tube 10 from the pond body 51, and then rotate the aeration membrane tube 10 in the horizontal plane. Rotate the portal frame formed by the aeration system at a certain angle in the horizontal direction so that the portal frames formed by this aeration system and other aeration systems are not parallel to each other. At this time, the projection width of the portal frame composed of the aeration membrane tube 10 and the hoisting member 41 becomes narrower in one installation direction, so it can slide within the portal frames of other aeration systems.

[0117] Step S230: Lift the hoisting members 41 at both ends of the aeration membrane tube 10 and hook the hoisting members 41 to the slide rails 54.

[0118] Specifically, lift the removed hoisting members 41 at both ends of the aeration membrane tube 10 upward, and then hook the two hoisting members 41 to the slide rails 54 on both sides respectively. The hooking method can use sliders. The sliders are slidably arranged on the slide rails 54, and the hoisting members 41 are connected to the sliders, so that the hoisting members 41 can be hooked on the slide rails 54 and can slide on the slide rails 54. Or, the hoisting member 41 is provided with a hook, and the hook is hooked on the slide rail 54.

[0119] Step S240: Slide the hoisting member 41 and slide the aeration membrane tube 10 towards the reserved hole in the pond body 51, and finally take out the aeration membrane tube 10 through the inspection hole.

[0120] Specifically, slide the hoisting member 41, slide the aeration membrane tube 10 to near the end walkway platform, and then pull out the aeration membrane tube 10 from the inspection hole. Place the aeration membrane tube 10 at the bottom on the platform at the end of the pond body 51 for maintenance and replacement. Operate in the reverse process of the above process, and a new set of aeration portal frames can be slid to the preset position. After connecting and fixing the hoisting members 41 at both ends, the installation work is completed.

[0121] Please refer to Figure 27, in an embodiment, if the middle part of the aeration membrane tube 10 needs to be connected to the air inlet pipe 30, to prevent collision during the disassembly and assembly sliding process, the middle air inlet pipe 30 can be arranged along the original door-shaped frame contour, that is, the air inlet pipe 30 is bundled and connected to one side of the sling 40, and then bent to be connected to the air inlet joint 11 in the middle of the aeration membrane tube 10. It should be noted that a counterweight 80 should be set on the sling 41 on the other side to prevent the center of gravity from shifting during aeration hoisting and causing the level to be unbalanced.

[0122] The installation and removal method of the above-mentioned hoisting type aeration system can realize the installation and removal of the aeration membrane tube 10 in the restricted space 50, and is applicable to the installation of aeration equipment without entering the pool with water in the covered pool body 51, improving the application range of the hoisting type aeration system.

[0123] 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 recorded 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 description of the present invention.

Claims

1. An aeration membrane tube, characterized in that, Comprising: An air inlet joint for supplying gas; A support pipe connected to the air inlet joint, the support pipe and the air inlet joint forming a gas distribution chamber, the gas distribution chamber being separated from the inner cavity of the support pipe, and an opening for communicating the inner cavity of the support pipe with the outside being provided at the end of the support pipe away from the air inlet joint; And A porous membrane tube sleeved outside the support pipe and circumferentially fixed at least at one end by a clamp, a gas charging space being formed between the porous membrane tube and the side wall of the support pipe, and an air inlet for communicating the gas charging space being provided on the side wall of the gas distribution chamber; Wherein, the overall density of the aeration membrane tube is greater than that of water so as to keep the gravity of the aeration membrane tube greater than the buoyancy of the aeration membrane tube.

2. The aeration membrane tube according to claim 1, characterized in that, The density of the support pipe is greater than that of water; and / or a counterweight is provided inside the support pipe.

3. The aeration membrane tube according to claim 1, characterized in that, The support pipe includes an air inlet end connected to the air inlet joint and an open end away from the air inlet joint, and the open end is arranged higher than the air inlet end.

4. The aeration membrane tube according to claim 1, characterized in that, Spiral reinforcing strips extending along the axial direction thereof are provided inside the porous membrane tube; and / or A spiral wire sleeve is arranged outside the porous membrane tube, and a gap is provided between the spiral wire sleeve and the porous membrane tube.

5. The aeration membrane tube according to claim 1, characterized in that, At least one protruding portion protruding outward is provided on the side wall of the support pipe, and the protruding portion presses against the porous membrane tube.

6. The aeration membrane tube according to claim 1, wherein The gas distribution chamber includes a gas chamber plug for separating the gas distribution chamber from the inner cavity of the support pipe, and the gas chamber plug and the inner wall of the support pipe and / or the inner wall of the air inlet joint enclose the gas distribution chamber.

7. The aeration membrane tube according to claim 6, characterized in that, The air inlet is located on the side of the gas chamber plug close to the air inlet joint.

8. The aeration membrane tube according to claim 1, characterized in that, Connection holes for the air inlet joint to penetrate are provided in the middle of the support pipe and the porous membrane tube, and a fitting washer for pressing the porous membrane tube around the connection hole against the support pipe is sleeved on the air inlet joint.

9. The aeration membrane tube according to claim 1, wherein The support pipe includes two segments, the two segments of the support pipe are respectively connected to the air inlet joint, and the ends of the porous membrane tube are circumferentially fixed to the support pipe by the clamp.

10. The aeration membrane tube according to claim 1, characterized in that, The air inlet joint is connected to the end of the support pipe, and both ends of the porous membrane tube are circumferentially fixed to the support pipe by the clamp.

11. A hoisting type aeration system, characterized in that Comprising: The aeration membrane tube as described in any one of claims 1 - 10 and an air inlet pipe, the air inlet pipe being detachably connected to the air inlet joint, and the middle and / or both ends of the aeration membrane tube being flexibly connected for hoisting in a pool body.

12. A method for installing a hoisting type aeration system, which is used to install the hoisting type aeration system according to claim 11 in a confined space, and both ends of the aeration membrane tube are flexibly connected, characterized in that, The installation method includes the following steps: Providing the restricted space, the restricted space including a pool body and a cover for closing the pool body, two groups of installation holes and an observation hole located between the two groups of installation holes being provided on the cover; Outside the restricted space, one end of an auxiliary rope is passed through the installation hole into the pool body, then passed out through the other installation hole, and then the two ends of the auxiliary rope are connected to form a loop; A first hoisting member is fixedly connected to the loop, the first hoisting member is connected to one end of the aeration membrane tube, and a second hoisting member is connected to the other end of the aeration membrane tube; Insert the hoisting member connected to the annular cable sleeve and the aeration membrane tube into the pool body through the installation hole, and rotate the annular cable sleeve so that the first hoisting member passes through the other installation hole; Adjust the lengths of the hoisting members at both ends of the aeration membrane tube to hoist the aeration membrane tube to a proper position in the pool body.

13. The installation method of the hoisting aeration system according to claim 12, characterized in that, When both ends of the aeration membrane tube are hoisted by a sling, the air inlet pipe is inserted into the pool body through the observation hole and detachably connected to the air inlet joint.

14. A method for removing a hoisting type aeration system, which is used to take out the hoisting type aeration system described in claim 11 from a confined space. Both ends of the aeration membrane tube are flexibly connected. It is characterized in that, The removal method includes the following steps: Provide the confined space, which includes a pool body and a cover body that encloses the pool body. A inspection passage for operators to pass through is provided at the top of the pool body, and a slide rail extending inward beyond the side wall of the pool body is provided at the top of the pool body; Remove the hoisting members at both ends of the aeration membrane tube from the pool body, and rotate the aeration membrane tube in the horizontal plane so that the projection of the aeration membrane tube and the hoisting members in one installation direction becomes narrower; Lift the hoisting members at both ends of the aeration membrane tube and hook the hoisting members to the slide rail; Slide the hoisting member to slide the aeration membrane tube towards the reserved hole of the pool body, and finally take out the aeration membrane tube through the inspection hole.

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