Aeration membrane tube and hoisting type aeration system

Abstract

The utility model discloses an aeration membrane tube and a 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 application relates to the technical field of sewage treatment, in particular to an aeration membrane tube and a hoisting type aeration system. BACKGROUND

[0002] It is known that 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 flexible porous pipe sleeve rigid composite pipe, and a rigid perforated pipe. The first two types have a large number of small holes, and the oxygen utilization rate is high.

[0003] When the membrane tube containing the flexible porous pipe is aerated, the membrane tube is compressed by the gas, the micro-holes on the rubber membrane expand by themselves to charge oxygen into the pool, the bubbles are cut by the micro-holes to become small, and the size of the bubbles can be adjusted by the increase or decrease of the gas volume, so that a better oxygenation effect is obtained. When aeration stops, the membrane of the aerator has a self-closing function, the micro-holes on the rubber membrane will close by themselves, and sewage will not enter the aerator system. After a long time of stopping aeration, normal aeration can still be achieved.

[0004] At present, for the aeration membrane tube with the flexible porous pipe, since the gas is filled into the membrane tube, the air forms an air cavity in the membrane tube, and the aeration membrane tube is subjected to a large buoyancy, which causes the aeration membrane tube to float up. Therefore, in the prior art, the aeration membrane tube is generally installed on the bottom of the pool body through a fixed support or is suspended through a fixed support. However, the above treatment method has the following problems: on the one hand, the installation cost of the aeration membrane tube through the fixed support is high, and on the other hand, the levelness of the aeration membrane tube is not easy to adjust, which leads to uneven aeration. SUMMARY

[0005] Therefore, it is necessary to provide an aeration membrane tube and a hoisting type aeration system to solve the problems of high cost and uneven aeration of the existing aeration membrane tube device.

[0006] An aeration membrane tube comprises:

[0007] An air inlet joint is configured to provide gas;

[0008] A support pipe is connected to the air inlet joint, and 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 the end of the support pipe away from the air inlet joint is provided with an opening for connecting the inner cavity of the support pipe to the outside; and

[0009] A porous membrane tube is sleeved outside the support pipe and is fixed by a clamp at least at one end, a gap between the porous membrane tube and the side wall of the support pipe forms an air charging space, and a side wall of the gas distribution chamber is provided with an air inlet connected to the air charging space.

[0010] The overall density of the aeration membrane tube is greater than water, so that the gravity of the aeration membrane tube is greater than the buoyancy of the aeration membrane tube.

[0011] The hoisting type aeration system comprises the aeration membrane tube and an air inlet pipe which is detachably connected with 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] The aeration membrane tube and the hoisting type aeration system have at least the following advantages:

[0013] 1. The air cavity buoyancy during aeration is offset by gravity, and the aeration membrane tube does not need to be fixed by a fixed support, thereby simplifying the installation process and reducing the cost. 2. The port of the aeration membrane tube is raised, which is beneficial to quickly discharge the gas in the support pipe under different working conditions, can compensate the resistance loss in the air distribution pipe, makes the air output of the multi-hole membrane tube more uniform, ensures the balance of the aeration effect, and can exclude external interference during the working process to easily return to the balanced vertical state, thereby increasing the stability of the system. 3. An expansion limiting structure is designed outside the multi-hole membrane tube to limit the maximum volume of the multi-hole membrane tube, so that the gravity of the system is greater than the buoyancy, and the system can be stably worked at the bottom of the pool body. 4. At least one protruding part is arranged on the side wall of the support pipe, the internal and external pressure difference of the multi-hole membrane tube is greatly reduced during working, the buoyancy of the equipment during working is further reduced, and the working condition of the system is more stable. 5. The aeration membrane tube is hoisted and fixed, the levelness of the hoisting cable can be controlled at the top of the pool, the levelness of the aeration membrane tube is accurately adjusted, the operation is simple and easy to implement in the upper free space, and the uniformity of aeration is ensured. The aeration system can be installed and maintained outside the pool body, and the pool body does not need to be emptied, thereby saving the maintenance time and shutdown cost of the production enterprise. 6. The hoisting type aeration system can be disassembled and assembled in a limited space, is suitable for installing the aeration equipment without entering the pool with water in the pool body with a cover, and improves the use range of the hoisting type aeration membrane tube. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the specific embodiments of the present application, the drawings required to be used in the specific embodiments will be briefly introduced below. In all the drawings, various elements or parts are not necessarily drawn according to the actual proportion.

[0015] Figure 1 It is a structural schematic view of the aeration membrane tube in an embodiment;

[0016] Figure 2 It is a structural schematic view of the aeration membrane tube in another embodiment;

[0017] Figure 3 It is a structural schematic view of the aeration membrane tube in another embodiment; Figure 1 It is a schematic view of detachable connection between the air chamber plug and the support pipe;

[0018] Figure 4 Schematic diagram of support pipe in split structure in one embodiment;

[0019] Figure 5 Schematic diagram of support pipe in split structure in another embodiment;

[0020] Figure 6 Schematic diagram of air inlet joint connected with end of support pipe in one embodiment;

[0021] Figure 7 Schematic diagram of air inlet joint connected with end of support pipe in another embodiment;

[0022] Figure 8 Schematic diagram of aeration membrane pipe port lifting design;

[0023] Figure 9 Schematic diagram of aeration membrane pipe external design expansion limiting structure;

[0024] Figure 10 Schematic diagram of aeration comparison between circular support pipe and square support pipe;

[0025] Figure 11 Schematic diagram of support pipe in polygonal shape;

[0026] Figure 12 Partial sectional view of support pipe in two rectangular pipes;

[0027] Figure 13 Schematic diagram of hoisting type aeration system in one embodiment;

[0028] Figure 14 Schematic diagram of hoisting type aeration system in another embodiment;

[0029] Figure 15 Schematic diagram of multiple sets of hoisting type aeration system in series;

[0030] Figure 16 Schematic diagram of aeration membrane pipe with cross-shaped hoisting cable installed at both ends;

[0031] Figure 17 Flowchart of installation method of hoisting type aeration system in one embodiment;

[0032] Figure 18 Schematic diagram of auxiliary rope inserted into installation hole;

[0033] Figure 19 Schematic diagram of auxiliary rope pulled out from another installation hole and connected as a looped cable sleeve;

[0034] Figure 20 Schematic diagram of hoisting member connected with looped cable sleeve;

[0035] Figure 21 Fig. 6 is a schematic view of the lifting of the aeration membrane tube into the pool body through the installation hole by the lifting cable and the air inlet pipe;

[0036] Figure 22 Fig. 7 is a schematic view of the air inlet pipe of the end of the aeration membrane tube passing through the installation hole;

[0037] Figure 23 Fig. 8 is a schematic view of the lifting of the two ends of the aeration membrane tube into the pool body through the air inlet pipe and the lifting cable;

[0038] Figure 24 Fig. 9 is a schematic view of the lifting of the two ends of the aeration membrane tube into the pool body through the two lifting cables;

[0039] Figure 25 Fig. 10 is a flow chart of the dismounting method of the lifting type aeration system in one embodiment;

[0040] Figure 26 Fig. 11 is a schematic view of the portal formed by the aeration membrane tube and the lifting member rotating in one installation direction with the projected width narrowing;

[0041] Figure 27 Fig. 12 is a schematic view of the air inlet pipe and the lifting cable being tied together and the other side lifting cable being designed with a counterweight.

[0042] Reference signs:

[0043] 10 - aeration membrane tube, 11 - air inlet joint, 111 - transverse extension, 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 member, 145 - fixing hole, 146 - bolt, 15 - clamp, 16 - inflation space, 17 - anastomosis washer, 18 - gland, 19 - auxiliary connecting cylinder, 21 - helical reinforcing strip, 22 - helical wire sleeve, 30 - air inlet pipe, 40 - lifting cable, 41 - lifting member, 42 - intermediate connecting member, 50 - restricted space, 51 - pool body, 52 - cover body, 521 - installation hole, 522 - observation hole, 53 - inspection passage, 54 - sliding rail, 60 - ring cable sleeve, 70 - auxiliary hook rod, 80 - counterweight. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application 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 spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0045] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. Where, when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions as used herein are for illustrative purposes only and are not intended to be limiting.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0047] Please refer to Figure 1 An embodiment of the aeration membrane tube 10 is used for aeration and oxygenation in sewage treatment. Specifically, the aeration membrane tube 10 includes a gas inlet joint 11, a support tube 12, and a porous membrane tube 13.

[0048] The gas inlet joint 11 is used to provide gas, and the support tube 12 is connected to the gas inlet joint 11. The support tube 12 and the gas inlet joint 11 form a gas distribution chamber 14, which is separated from the inner cavity of the support tube 12. The end of the support tube 12 away from the gas inlet joint 11 is provided with an opening that connects the inner cavity of the support tube 12 to the outside. The porous membrane tube 13 is sleeved on the outside of 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 aeration space 16, and the side wall of the gas distribution chamber 14 is provided with a gas inlet 142 that communicates with the aeration space 16. The overall density of the aeration membrane tube 10 is greater than water, so that the gravity of the aeration membrane tube 10 is greater than the buoyancy of the aeration membrane tube 10.

[0049] The aeration membrane tube 10 described above, when placed in a pool, water in the pool 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 smoothly discharged, reducing the buoyancy of the pipeline in water. Therefore, during the aeration process of the aeration membrane tube 10, the air cavity is only the gas distribution chamber 14 and the aeration space 16, and the volume of the gas distribution chamber 14 and the aeration space 16 is relatively small, so the generated buoyancy is relatively small, greatly reducing the influence of the buoyancy on the aeration membrane tube 10, and the gravity can more easily offset the buoyancy of the air cavity during aeration, so that the overall density of the aeration membrane tube 10 is greater than water, and the gravity of the aeration membrane tube 10 is greater than the buoyancy of the aeration membrane tube 10, thereby avoiding the aeration membrane tube 10 from floating. The aeration membrane tube 10 does not need to be fixed by a fixed support, thereby simplifying the installation process and reducing the cost.

[0050] In an embodiment, the density of the support pipe 12 is greater than water, so that the overall density of the aerated membrane pipe 10 is greater than water. Specifically, the support pipe 12 is partially or entirely made of metal. For example, the material of the support pipe 12 can be stainless steel, internally and externally anticorrosive steel pipe, and PSP steel-plastic composite pipe, etc. The internally and externally anticorrosive process of the steel pipe can be spraying, coating or dipping, etc. In an embodiment, the support pipe 12 can also be made of non-metallic material. The support pipe 12 can be made of plastic, and a counterweight with a density greater than water can be designed inside the support pipe 12, so that the overall density of the aerated membrane pipe 10 is greater than water. Specifically, the counterweight can be stone, concrete block or iron block, etc.

[0051] In an embodiment, the clamp 15 can be a stainless steel clamp, and the clamp 15 can also be a plastic clamp, etc., as long as it can achieve the circumferential fixation of the porous membrane pipe 13 on the support pipe 12, and avoid the escape of the gas in the inflation space 16.

[0052] In an embodiment, the air distribution chamber 14 includes a chamber plug 141 for separating the air distribution chamber 14 from the inner cavity of the support pipe 12. The chamber plug 141 is surrounded by the inner wall of the support pipe 12 and / or the inner wall of the air inlet connector 11 to form the air distribution chamber 14. The air inlet 142 is located on the side of the chamber plug 141 close to the air inlet connector 11. The air inlet connector 11 can be connected to the middle part of the support pipe 12, and the air inlet connector 11 can also be connected to the end part of the support pipe 12. Among them, when the air inlet connector 11 is connected to the middle part of the support pipe 12, the support pipe 12 can be an overall structure, and the support pipe 12 can also be divided into two segments at the air inlet connector 11.

[0053] Please refer to Figure 2 In an embodiment, the middle part of the support pipe 12 and the porous membrane pipe 13 is provided with a connecting hole for the air inlet connector 11 to pass through, and a matching gasket 17 is sleeved on the air inlet connector 11 for pressing the porous membrane pipe 13 around the connecting hole against the support pipe 12. When the outer surface of the support pipe 12 is arc-shaped, the matching gasket 17 is saddle-shaped, the overall design of the membrane pipe is fixed by penetration, the fixed strength is large, and the porous membrane pipe 13 is penetrated and pressed in the middle and will not move to both sides.

[0054] In an embodiment, the connecting hole can pass through the entire support pipe 12, and the connecting hole can also pass through only one side wall of the support pipe 12. When the connecting hole passes through the entire support pipe 12, the air inlet connector 11 passes out of the support pipe 12, so the air inlet connector 11 is sleeved with the matching gasket 17 at both ends of the support pipe 12, and the air inlet connector 11 is threadedly connected with the gland 18 at both ends of the support pipe 12. The gland 18 presses and fixes the matching gasket 17, so that the matching gasket 17 presses the porous membrane pipe 13 around the connecting hole against the support pipe 12.

[0055] As Figure 2As shown, when the connecting hole only penetrates one side wall of the support tube 12, in order to realize the connection of the air inlet joint 11 and the support tube 12, an auxiliary connecting cylinder 19 needs to be installed on the side wall of the connecting hole, the inner wall of the auxiliary connecting cylinder 19 is provided with an internal thread, and the air inlet joint 11 is threadedly connected in the auxiliary connecting cylinder 19. The air inlet joint 11 is sleeved with an anastomosis gasket 17, which is tightly fixed by a threaded cover 18 on the air inlet joint 11, so as to realize that the anastomosis gasket 17 tightly presses the porous membrane tube 13 around the connecting hole on the support tube 12.

[0056] In an embodiment, when the support tube 12 is of an integral structure, the air chamber plug 141 is installed in the support tube 12, the support tube 12, the air chamber plug 141 and the air inlet joint 11 jointly enclose the air distribution chamber 14, and the air inlet 142 is arranged on the support tube 12. In an embodiment, the air chamber plug 141 can be welded, bonded or heat-fused to be connected in the support tube 12. Of course, the air chamber plug 141 can also be detachably connected in the support tube 12, so as to facilitate the disassembly and maintenance of the air chamber plug 141.

[0057] Please refer to Figure 3 , specifically, the peripheral edge of the air chamber plug 141 is provided with a sealing ring 143, which seals the gap between the air chamber plug 141 and the inner wall of the support tube 12, and the sealing ring 143 can be deformed, so that the air chamber plug 141 can slide and adjust the position in the support tube 12 under the action of external force. The side of the air chamber plug 141 close to the air distribution chamber 14 is provided with a connecting piece 144, the side wall of the support tube 12 is provided with a fixing hole 145, the fixing hole 145 is provided with a latch 146, and the latch 146 is inserted into the hole of the connecting piece 144, so as to realize the position fixation 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 cannot enter the inner cavity of the support tube 12.

[0058] Please refer to Figure 4 and Figure 5In an embodiment, when the support tube 12 is in a split structure, the support tube 12 includes two segments, and the two segments of the support tube 12 are connected with the air inlet joint 11 respectively, and the end of the porous membrane tube 13 is fixed on the support tube 12 by the clamp 15. Specifically, the air inlet joint 11 is similar to a tee structure, or the air inlet joint 11 is formed by secondary processing of a tee. The air inlet joint 11 has two transverse extensions 111, and the two segments of the support tube 12 are connected with the two transverse extensions 111 of the air inlet joint 11 respectively, and the connection mode can be sleeving or welding, etc. The air chamber plug 141 can be installed in the support tube 12, or the air chamber plug 141 can be installed in the transverse extension 111 of the air inlet joint 11. The air chamber plug 141 can be welded, bonded or heat fused in the support tube 12 or the air inlet joint 11, or the air chamber plug 141 can be integrally formed with the support tube 12 or the air inlet joint 11. The air inlet 142 can be formed on the support tube 12, or the air inlet 142 can be formed on the transverse extension 111.

[0059] Please refer to Figure 6 and Figure 7 In an embodiment, when the air inlet joint 11 is connected with the end of the support tube 12, the two ends of the porous membrane tube 13 are fixed on the support tube 12 by the clamp 15. The connection mode of the air inlet joint 11 and the support tube 12 can be sleeving, welding or even integrally formed. The air chamber plug 141 can be installed in the support tube 12, or the air chamber plug 141 can be installed in the air inlet joint 11.

[0060] Please refer to Figure 8 In an embodiment, the support tube 12 includes an air inlet end 121 connected with the air inlet joint 11 and an open end 122 away 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 tube 12 is small, the bending and curvature of the thin tube and long rod under the action of gravity when suspended at both ends can meet the requirement of lifting the open end 122. When the diameter of the support tube 12 is large and the rod is short, i.e., the bending resistance is large, the open end 122 can be lifted by pre-treatment bending or inclined connection.

[0061] In the embodiment, the end of the support tube 12 is provided with an opening, and the sewage in the pool body can enter the support tube 12, and the sludge in the support tube 12 can produce gas. In order to improve the exhaust effect of the open end 122 of the support tube 12 and prevent the gas produced by the sludge in the tube from being normally discharged, the port of the support tube 12 away from the air inlet joint 11 is designed to be lifted, which is beneficial to quickly discharge the gas in the support tube 12 under different working conditions.

[0062] Meanwhile, raising the open end 122 compensates for resistance losses in the air distribution tube, making the air output of the porous membrane tube 13 more uniform and ensuring balanced aeration. As gas is transported through the narrow gaps in the porous membrane tube 13, the gas pressure gradually decreases due to resistance against the inner wall, resulting in shallower water at greater distances, thus compensating for the resistance loss. Finally, in scenarios where air enters from the middle of the support tube 12, the lower air inlet end 121 and higher open end 122 of the support tube 12 lower the center of gravity of the entire aeration membrane tube 10, similar to a pendulum effect. This eliminates external interference during operation, allowing the system to easily return to its vertical equilibrium point, increasing system stability.

[0063] In the initial operation of traditional membrane tubes, the resistance of the membrane pores is usually low. The rubber expands and deforms slightly after compressed air is introduced. At this time, the volume of the hollow cavity in the aeration membrane tube 10 is small, and the buoyancy of the aeration system is less than the weight of the system, allowing it to operate safely at the bottom of the pool. However, as the air outlets become scaled or blocked, the air output capacity of the membrane tube gradually decreases. At this time, the pressure difference across the rubber diaphragm (transmembrane pressure difference) rises sharply, causing the membrane tube to expand and deform (the membrane thickness is generally 1.5-2 mm due to the resistance of air bubbles passing through the membrane). Finally, the aeration membrane tube 10 system loses control and floats to the surface.

[0064] like Figure 9 As shown, in one embodiment, the porous membrane tube 13 is designed with an expansion limiting structure, which reduces the expansion deformation of the porous membrane tube 13 under working conditions without affecting gas flow. Specifically, the porous membrane tube 13 has a spiral reinforcing strip 21 extending along its axial direction inside; and / or a spiral sleeve 22 is arranged outside the porous membrane tube 13, with a gap between the spiral sleeve 22 and the porous membrane tube 13. That is to say, the porous membrane tube 13 can have the spiral reinforcing strip 21 designed inside alone, or the spiral sleeve 22 designed outside alone, or the porous membrane tube 13 can have both the spiral reinforcing strip 21 and the spiral sleeve 22 designed simultaneously.

[0065] In the structure, the spiral reinforcing strip 21 is integrally formed during the production of the porous membrane tube 13, but this structure brings certain difficulty to the opening of the porous membrane tube 13 and the sealing of the porous membrane tube 13 and the support tube 12, and a 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 with the end portions of the support tube 12, or can be selected to be connected with the clamps 15 at the two ends of the support tube 12. The inner diameter of the spiral wire sleeve 22 is the same as the maximum expanded outer diameter of the porous membrane tube 13, and the gap between the inner side of the wire sleeve and the outer surface of the porous membrane tube 13 after production is generally 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 the bubbles nor has the self-cleaning function, and under the adverse factors such as membrane tube blockage, large aeration amount, and rubber aging deformation, the maximum volume of the porous membrane tube 13 can be limited to ensure that the gravity of the system is greater than the buoyancy, so that the system can be stably worked at the bottom of the pool.

[0066] Please refer to Figure 10 In an embodiment, in order to increase the mass transfer efficiency, the side wall of the support tube 12 is provided with at least one outwardly protruding protrusion 123, the protrusion 123 presses the porous membrane tube 13, so that the surface curvature of the porous membrane tube 13 becomes smaller and closer to a plane, so that the porous membrane tube 13 is not uniformly stressed, and the transmembrane resistance of the porous membrane tube 13 is reduced. Tests show that under the same working conditions, the effective oxygen supply capacity per degree of this structure can be increased from 2 kg to more than 2.4 kg, and the main reasons are as follows:

[0067] The same material membrane with the same thickness is connected with the same size hole, and the hole density is the same. Engineering data shows that the transmembrane resistance of the circular structure is at least 5000 Pa, and the transmembrane resistance of the plane structure is only about 2000 Pa. The main reason for this phenomenon is that the circular structure is pressure-resistant, and the pressure of 2000 Pa can make the gas of the plane structure drill out of the small hole, and after the pressure is increased by more than one time, the gas can escape from the expanded small hole around the circular tube. At this time, part of the energy loss is wasted on the excessive transmembrane resistance, and part of the energy loss is wasted on the factors that the mass transfer capacity decreases after the bubbles become large.

[0068] Please refer to Figure 11In one embodiment, the support tube 12 is polygonal, with the corners forming protrusions 123. The support at each corner reduces the surface curvature of the membrane tube between the corners, making it closer to a plane. The polygonal support significantly reduces the internal and external pressure difference of the porous membrane tube 13 during operation. Because the relative air pressure inside the membrane decreases, the expansion and deformation of the air space 16 between the membrane and the support tube 12 is controlled. Therefore, the buoyancy experienced by the equipment during operation is further reduced, making the system's operating conditions more stable. Furthermore, connecting the polygonal support tube 12 to the air inlet connector 11 is convenient; a hole can be made on one face of the polygon for connection. Additionally, sealing at the interface on a flat surface is easier to achieve by using a flat gasket sealing ring. In contrast, the circular support tube 12 consists of two intersecting cylindrical surfaces, requiring a saddle-shaped sealing ring at the joint and sealing points.

[0069] Specifically, the shape of the support tube 12 can be triangular, square, pentagonal, hexagonal, etc. The area between two adjacent corners of the support tube 12 can be a plane, or it can be concave inward to increase the volume of the inflation space 16, that is, the support tube 12 is an irregular structure.

[0070] It is worth noting that the support pipe 12 has a polygonal structure. The disadvantage of this structure is that the higher the vertical direction, the stronger the bending resistance and the larger the installation span, but the narrower the air outlet area projection on the plane. If the horizontal direction is increased, the bending resistance decreases, but the plane projection is larger, increasing the air outlet area. To balance aeration area and bending strength, the support pipe 12 may require more material than a circular pipe. Figure 12 As shown, two rectangular tubes can be arranged parallel to each other at a certain interval to serve as support tubes 12. The middle part of the two rectangular tubes is filled with material at the ends 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 fully utilizes the air-filling space 16, which is more optimized in terms of fluid resistance than under the circular support condition. This is because when air flows through a circular membrane sleeve on a circular support tube 12, the porous membrane will vibrate, generating greater resistance.

[0071] The aeration membrane tube 10 utilizes gravity greater than buoyancy to avoid floating of the aeration membrane tube 10. The structure design of the aeration membrane tube 10 is optimized, so that the number of parts of the original single membrane tube aeration system is greatly reduced. For example, a 3-6m long aeration membrane tube 10 only has 2 clamps 15 (the existing technology has 2 seals for 1m long); the membrane tube and the aeration main pipe of the existing technology must be independently manufactured and installed and are connected by threads (easy to loosen and fall off), while the present application adopts a support pipe 12 with openings for connection; the original structure of the air distribution chamber 14 and the support pipe 12 must be bonded or welded, and cannot be disassembled and repaired after the equipment fails, 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 system leakage by reducing the number of connection points. The outer diameter of several commonly used specifications of the aeration membrane tube 10 is between 50-150mm, which can be applied to aeration with water operation in a pool body containing biological fillers (general contact oxidation biological fillers are bound on parallel steel bars, the spacing of the steel bars is usually 150-250mm, and the length of a single steel bar is usually 2.5-5m, which can be installed in the gap in a sinking manner). The pipeline containing part of the metal or all the metal is used as the support pipe 12, which solves the material defects in the traditional membrane tube aeration system (the traditional one is made of high polymer materials such as PE and UPVC), so that the maximum length of a single aeration pipe membrane tube is 3-6m, which is 3-6 times larger than the original one, greatly reducing the number of air inlet pipes 30 and the installation workload. The aeration membrane tube 10 can be installed by flexible hoisting without relying on external counterweight, and the levelness of the aeration membrane tube 10 is easy to adjust, which can ensure uniform aeration.

[0072] Please refer to Figure 13 The present application also provides a hoisting type aeration system, which comprises the aeration membrane tube 10 and the air inlet pipe 30, and the air inlet pipe 30 is detachably connected with the 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 pool body. That is, the middle part of the aeration membrane tube 10 can be flexibly connected to be hoisted in the pool body, or both ends of the aeration membrane tube 10 can be flexibly connected to be hoisted in the pool body, or the middle part and both ends of the aeration membrane tube 10 can be flexibly connected to be hoisted in the pool body.

[0073] Among them, the implementation mode of flexible connection includes a rigid rod structure with a length-diameter ratio greater than 80, a rigid rod structure with a soft joint, a cable structure (such as a multi-strand steel wire rope, a nylon rope, etc.), a chain structure, a composite hose, and a combination structure of the above basic shapes, such as chain rod combination, cable rod combination, etc. The rigid rod structure with a length-diameter ratio greater than 80, the rigid rod with a soft joint, and the composite hose can serve as both the air inlet pipe and the suspension structure.

[0074] The above hanging type aeration system is hung in the pool body by using gravity greater than buoyancy (the weight of the whole membrane tube is only dozens of kilograms, and the buoyancy received in the working state is only dozens of kilograms), which reduces the number of fixing frames of the aeration system, simplifies the installation process, and reduces the maintenance cost. Since the aeration membrane tube 10 is hung and fixed, the relative levelness between the top fixing ends of multiple hangers can be controlled at the pool top, the same aeration water depth and aeration uniformity are ensured, the levelness of the aeration membrane tube 10 is accurately adjusted, the operation is simple and easy to implement on the upper free space, and the workload of individually adjusting the elevations of a large number of supports on the pool bottom due to the uneven bottom plate of the traditional aeration system is avoided. For the multi-cell pool body of the traditional aeration pool, the height leveling of the aeration supports in different cells is a very challenging work, and the error is large, so the same set of aeration systems after installation will also have uneven aeration due to different aeration underwater depths of different pool bodies. The aeration system can be installed and maintained outside the pool body, without the need to empty the pool body, thereby saving the maintenance time and shutdown cost of the production enterprise.

[0075] Referring to Figure 13 and Figure 14 In an embodiment, the aeration membrane tube 10 is hung and fixed by using the air inlet pipe 30 and / or the hanger 40. Specifically, the air inlet pipe 30 can be connected to the middle part of the aeration membrane tube 10 to achieve hanging and fixing. Alternatively, the two ends of the aeration membrane tube 10 can be flexibly connected by the hangers 40, and the air inlet pipe 30 is connected to the middle part of the aeration membrane tube 10, so that the air inlet pipe 30 is not subjected to force. Alternatively, the two ends of the aeration membrane tube 10 are flexibly connected by the air inlet pipes 30 and the hangers 40 respectively.

[0076] Preferably, the aeration membrane tube 10 adopts the mode of flexible connection at both ends, so that the levelness and elevation of the aeration membrane tube 10 and the balance stability of the aeration system can be accurately controlled. For the scene where the air inlet pipe 30 participates in flexible hanging, the flexible joint of the pipeline may be damaged due to long-term force, at which time parallel cables can be arranged to compensate for the tension of the air inlet pipe 30, and the hanger is more flexible in height adjustment.

[0077] In an embodiment, when the middle and lower part of the air inlet pipe 30 is flexibly connected to the aeration membrane tube 10 to achieve hanging, a rope can be used to connect the two ends of the aeration membrane tube 10 to the air inlet pipe 30 in the middle part, which can prevent the aeration membrane tube 10 from being affected by the nearby aeration bubbles and water flow and being in an unbalanced state such as rotation in different directions of horizontal and vertical directions.

[0078] Referring to Figure 15In an embodiment, when the width of the pool body is large, in order to avoid the difficulty in processing caused by the excessively long size of the aeration membrane tube 10, a plurality of groups of the hoisting type aeration system are designed, and two adjacent aeration membrane tubes 10 are connected in series through the intermediate connecting piece 42. The intermediate connecting piece 42 is provided with an exhaust hole, and the gas in the support pipe 12 is discharged through the exhaust hole.

[0079] Referring to Figure 16 In an embodiment, when the two ends of the aeration membrane tube 10 are flexibly connected through the hoisting cable 40, the end of the aeration membrane tube 10 can be connected to two hoisting cables 40, and the two hoisting cables 40 are crossed at a certain angle, so that the imbalance state such as rotation in the horizontal direction, rotation in the up-down direction, and large amplitude swing can be avoided.

[0080] In an embodiment, when the two ends of the aeration membrane tube 10 are flexibly connected, the installation mode of hoisting at two ends is adopted, and the hoisting cable 40 on the two sides and the aeration membrane tube 10 form an inverted door frame. This structure is suitable for installation and maintenance requirements in various limited spaces. Since the two ends of the aeration membrane tube 10 can be hoisted by two hoisting cables 40 or hoisted by the hoisting cable 40 in cooperation with the air inlet pipe 30, in order to facilitate understanding, the hoisting cable 40 and the air inlet pipe 30 are collectively referred to as the hoisting piece 41.

[0081] Referring to Figure 17 and Figure 18 The present application also provides a mounting method of the hoisting type aeration system, which is used for mounting the above-mentioned aeration system hoisted at two ends in a limited space 50. Specifically, the mounting method comprises the following steps:

[0082] Step S110: providing a limited space 50, the limited space 50 comprising a pool body 51 and a cover body 52 enclosing the pool body 51, the cover body 52 being provided with two groups of mounting holes 521 and a viewing hole 522 located between the two groups of mounting holes 521.

[0083] Specifically, the cover body 52 is a structural cover plate, which belongs to a part of the pool body 51 and has a large load and can be stood on. The distance between the two groups of mounting holes 521 should correspond to the hoisting position of the two ends of the aeration membrane tube 10, and the viewing hole 522 is used for observing the installation of the aeration membrane tube 10 in the pool body 51 and can be used for installing the air inlet pipe 30 and the aeration membrane tube 10.

[0084] When the pool body 51 is considered for subsequent installation of aeration equipment before construction, the two groups of mounting holes 521 and the viewing hole 522 can be reserved. When the pool body 51 is considered for installation of aeration equipment after construction, the two groups of mounting holes 521 and the viewing hole 522 can be opened on the cover body 52 under the premise of ventilation in the pool (to prevent anaerobic gas explosion).

[0085] Step S120: Outside the confined space 50, one end of the auxiliary rope is threaded into the pool body 51 through the installation hole 521, and then threaded out through another installation hole 521, and then the two ends of the auxiliary rope are connected to form the ring-shaped rope sleeve 60.

[0086] Please refer to Figure 19 , specifically, for the case where the pool body 51 is considered for subsequent installation of aeration equipment before construction, the installation of the auxiliary rope is more convenient. The auxiliary rope is threaded into an installation hole 521, and then threaded out from another installation hole 521, and then the two ends of the auxiliary rope are connected to form the ring-shaped rope sleeve 60.

[0087] For the case where the pool body 51 is considered for installation of aeration equipment after construction, the auxiliary hook rod 70 can be inserted through the observation hole 522. After one end of the auxiliary rope is threaded into the installation hole 521, the auxiliary hook rod 70 hooks the auxiliary rope and sends the auxiliary rope into the lower part of another installation hole 521. Then the external operator threads the auxiliary rope out of the installation hole 521, and finally connects the two ends of the auxiliary rope to form the ring-shaped rope sleeve 60.

[0088] Step S130: Fix the first hoisting member 41 on the ring-shaped rope sleeve 60, connect the first hoisting member 41 with one end of the aeration membrane tube 10, and connect the other end of the aeration membrane tube 10 with the second hoisting member 41.

[0089] Please refer to Figure 20 , specifically, after the installation of the ring-shaped rope sleeve 60 is completed, the first hoisting member 41 is fixed on the ring-shaped rope sleeve 60, and the first hoisting member 41 is connected with one end of the aeration membrane tube 10, and the other end of the aeration membrane tube 10 is connected with the second hoisting member 41.

[0090] In an embodiment, in order to facilitate the aeration membrane tube 10 to be threaded into the pool body 51 from the installation hole 521, and the hoisting member 41 to be threaded out of the installation hole 521, the first hoisting member 41 fixed on the ring-shaped rope sleeve 60 is preferably a sling 40, and the second hoisting member 41 connected with the other end of the aeration membrane tube 10 is a sling 40 or an air inlet pipe 30.

[0091] Step S140: Thread the hoisting member 41 and the aeration membrane tube 10 connected by the ring-shaped rope sleeve 60 into the pool body 51 from the installation hole 521, and rotate the ring-shaped rope sleeve 60 to make the first hoisting member 41 threaded out of another installation hole 521.

[0092] Please refer to Figure 21 and Figure 22Specifically, the lifting cable 40 is first passed into the pool body 51 through the mounting hole 521, and then the aeration membrane tube 10 is also passed into the pool body 51 through the mounting hole 521. At this time, even if the air inlet pipe 30 is connected with the end of the aeration membrane tube 10, the aeration membrane tube 10 can pass through the mounting hole 521 due to the flexible connection between the air inlet pipe 30 and the aeration membrane tube 10 (or the size of the mounting hole 521 meets the insertion of the hard connection between the air inlet pipe 30 and the aeration membrane tube 10). The aeration membrane tube 10 is temporarily hung by the second lifting member 41 at the other end of the aeration membrane tube 10, the loop cable sleeve 60 is rotated, the first-passing lifting cable 40 is transported to below the other mounting hole 521, and the operator on the cover body 52 passes the lifting cable 40 out of the mounting hole 521 through the mounting hole 521.

[0093] Step S150: The length of the lifting member 41 at both ends of the aeration membrane tube 10 is adjusted to hang the aeration membrane tube 10 at a suitable position in the pool body 51.

[0094] Please refer to Figure 23 Specifically, the length of the lifting member 41 at both ends of the aeration membrane tube 10 is controlled, and then the pros and cons of the aeration effect are observed. After the position of the aeration membrane tube 10 is determined, the lifting member 41 is fixed on the cover body 52 to realize the hanging of the aeration membrane tube 10 at a suitable position in the pool body 51. The process of removing and repairing the aeration membrane tube 10 from the above-mentioned limited space 50 is the reverse process of the above-mentioned process, which will not be described in detail.

[0095] Please refer to Figure 24 In an embodiment, when the aeration membrane tube 10 is hung by the lifting cable 40 at both ends, the air inlet pipe 30 and the aeration membrane tube 10 can be separated in advance at this time. After the aeration membrane tube 10 is installed into the pool body 51, the aeration membrane tube 10 is lifted upwards, the air inlet joint 11 of the aeration membrane tube 10 is located below the observation hole 522, and then the air inlet pipe 30 and the air inlet joint 11 are detachably connected, such as threaded connection, flange connection or socket and spigot compression connection, to realize the connection between the air inlet pipe 30 and the aeration membrane tube 10.

[0096] Please refer to Figure 25 and Figure 26 The application also provides a removal method of the hanging aeration system, which is used to take out the above-mentioned aeration system hung at both ends from the limited space 50. Specifically, the removal method comprises the following steps:

[0097] Step S210: A limited space 50 is provided, the limited space 50 comprises a pool body 51 and a cover body 52 enclosing the pool body 51, the top of the pool body 51 is provided with an inspection passage 53 for an operator to pass through, and the top of the pool body 51 is provided with a slide rail 54 extending inwardly beyond the side wall of the pool body 51.

[0098] Specifically, for the structural opening pool body 51, because the gas collection in the pool is considered, the cover plate is subsequently added, and there is generally a passage for entering the maintenance between the subsequently added cover plate and the main body of the pool body 51. In order to reduce the weight of the cover plate, an arched cover plate or an external steel keel combined with an internal reverse hanging film structure is generally used. The pool body 51 to which the cover plate is subsequently added generally cannot have excessive load, that is, people cannot stand on the top. Before the aeration membrane tube 10 hoisted at both ends is disassembled and removed, 2 slide rails 54 should be pre-set on the inner side above the hoisting position in the removal direction. The 2 slide rails 54 should extend inward beyond the inner wall of the pool body 51.

[0099] Step S220: The hoisting piece 41 at both ends of the aeration membrane tube 10 is disassembled from the pool body 51, and the aeration membrane tube 10 is rotated in the horizontal plane to narrow the projection of the aeration membrane tube 10 and the hoisting piece 41 in an installation direction.

[0100] Specifically, the hoisting piece 41 of the aeration membrane tube 10 is disassembled from the pool body 51, and then the aeration membrane tube 10 is rotated in the horizontal plane. The door-shaped frame formed by the aeration system is rotated at a certain angle in the horizontal direction, so that the door-shaped frame formed by the aeration system is not parallel to the door-shaped frame of other aeration systems. At this time, the projection width of the door-shaped frame composed of the aeration membrane tube 10 and the hoisting piece 41 in an installation direction is narrowed, so that it can slide in the door-shaped frame of the other aeration system.

[0101] Step S230: The hoisting piece 41 at both ends of the aeration membrane tube 10 is lifted, and the hoisting piece 41 is hung with the slide rail 54.

[0102] Specifically, the hoisting piece 41 disassembled at both ends of the aeration membrane tube 10 is lifted upward, and then the two hoisting pieces 41 are hung with the slide rails 54 on both sides. The hanging mode can adopt a sliding block, the sliding block is slidably arranged on the slide rail 54, the hoisting piece 41 is connected with the sliding block, so that the hoisting piece 41 can be hung on the slide rail 54 and can slide on the slide rail 54. Alternatively, the hoisting piece 41 is provided with a hook, and the hook is hung on the slide rail 54.

[0103] Step S240: Slide the hoisting piece 41 to slide the aeration membrane tube 10 to the reserved hole of the pool body 51, and finally take out the aeration membrane tube 10 through the maintenance hole.

[0104] Specifically, the hoisting piece 41 is slid to slide the aeration membrane tube 10 to the vicinity of the walkway platform at the end, and then the aeration membrane tube 10 is pulled out from the maintenance hole. The bottom aeration membrane tube 10 can be placed on the platform at the end of the pool body 51 for maintenance and replacement. According to the reverse process of the above process, a new set of aeration door-shaped frames can be slid to the pre-set position, and the installation work is completed after the two end hoisting pieces 41 are connected and fixed.

[0105] Please refer to Figure 27In an embodiment, if the middle part of the aeration membrane tube 10 needs to be connected to the air inlet pipe 30, in order to prevent collision during disassembly and sliding, the middle air inlet pipe 30 can be arranged along the original door frame contour, that is, the air inlet pipe 30 is bound and connected with the sling 40 on one side, and then is bent to be connected with the air inlet joint 11 in the middle part of the aeration membrane tube 10. It should be noted that the hoisting member 41 on the other side should be provided with a counterweight 80 to prevent the center of gravity from deviating during aeration hoisting, causing imbalance of the horizontal degree.

[0106] The installation and removal method of the hoisting type aeration system can realize installation and removal of the aeration membrane tube 10 in the limited space 50, is suitable for installation of the aeration equipment without entering the pool with water in the pool body 51 with a cover, and improves the use range of the hoisting type aeration system.

[0107] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; 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 application, and should be covered in the scope of the claims and the specification of the present application.

Claims

1. An aerated membrane tube, characterized by, include: Air inlet connector, used to supply gas; A support tube is connected to the air inlet connector. The support tube and the air inlet connector form an air distribution chamber. The air distribution chamber is separated from the inner cavity of the support tube. The end of the support tube away from the air inlet connector is provided with an opening that connects the inner cavity of the support tube to the outside. and A porous membrane tube is sleeved outside the support tube and at least one end is circumferentially fixed by a clamp. The gap between the porous membrane tube and the side wall of the support tube forms an inflation space. An air inlet communicating with the inflation space is provided on the side wall of the air distribution chamber. The overall density of the aeration membrane tube is greater than that of water, so that the weight of the aeration membrane tube is greater than its buoyancy.

2. The aerated membrane tube according to claim 1, wherein, The density of the support tube is greater than that of water; and / or the support tube is equipped with a counterweight.

3. The aerated membrane tube of claim 1, wherein, The support tube includes an intake end connected to the intake connector and an open end away from the intake connector, the open end being arranged higher than the intake end.

4. The aerated membrane tube of claim 1, wherein, The porous membrane tube is provided with spiral reinforcing strips extending along its axial direction; and / or A spiral sleeve is arranged outside the porous membrane tube, and there is a gap between the spiral sleeve and the porous membrane tube.

5. The aerated membrane tube of claim 1, wherein, The sidewall of the support tube is provided with at least one outwardly protruding part, which presses against the porous membrane tube.

6. The aerated membrane tube of claim 1, wherein, The air distribution chamber includes an air chamber plug, which is used to separate the air distribution chamber from the inner cavity of the support tube. The air chamber plug, the inner wall of the support tube, and / or the inner wall of the air inlet connector form the air distribution chamber.

7. The aerated membrane tube of claim 6, wherein, The air inlet is located on the side of the air chamber plug near the air inlet connector.

8. The aerated membrane tube of claim 1, wherein, The support tube and the porous membrane tube have a connection hole in the middle for the air inlet connector to pass through. The air inlet connector is fitted with a fitting gasket for pressing the porous membrane tube around the connection hole onto the support tube.

9. The aerated membrane tube of claim 1, wherein, The support tube includes two segments, which are respectively connected to the air inlet connector. The end of the porous membrane tube is circumferentially fixed to the support tube by the clamp.

10. The aerated membrane tube of claim 1, wherein, The air inlet connector is connected to the end of the support tube, and the two ends of the porous membrane tube are circumferentially fixed to the support tube by the clamp.

11. A suspended aeration system characterized by, include: The aeration membrane pipe and air inlet pipe as described in any one of claims 1-10, wherein the air inlet pipe is detachably connected to the air inlet connector, and the middle and / or both ends of the aeration membrane pipe are flexibly connected to be suspended in the pool body.

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