A water treatment structure sealing air bag based on magnetic positioning and method

Abstract

The application discloses a water treatment structure plugging air bag based on magnetic positioning and a method thereof. The air bag comprises a cable, a power supply and a telescopic air bag body. One end of the air bag body is provided with a fixed rod fixedly connected thereto, and the other end is provided with an air bag front cover fixedly connected thereto. The end of the air bag front cover away from the air bag body is connected with a plurality of suction cup electromagnets through a plurality of elastic telescopic pipes. The fixed rod is a hollow rod, and the end of the fixed rod away from the air bag body is communicated with an air compressor unit. The magnetic force of the plurality of suction cup electromagnets is alternately adsorbed to realize the driving force of the air bag walking. The driving force cooperates with the thrust of the fixed rod applied to the air bag body, so that the air bag can completely enter the to-be-plugged pipeline to completely plug the pipeline, thereby improving the plugging effect. In addition, the air bag structure is simple and easy to operate, the air bag is not limited in the moving process, the moving distance is large, the air bag can be quickly and accurately moved to the pipeline opening, and the plugging work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of underwater airbag sealing technology, specifically to a sealing airbag and method for water treatment structures based on magnetic positioning. Background Technology

[0002] Currently, there is an increasing number of wastewater treatment plant upgrading and renovation projects in China. Some tanks require emptying during the renovation process. Since many structures in wastewater treatment plants are interconnected, it is unavoidable to use airbags for temporary sealing when renovating individual tanks to prevent the emptying of all interconnected structures.

[0003] Wastewater treatment plant pools are primarily filled with sewage, resulting in low visibility. A common method is for divers to descend and insert airbags into the pipes for sealing. However, this method presents several problems in actual construction. First, toxic gases such as hydrogen sulfide can accumulate in sewage pools that have been in operation for a long time, posing a risk of injury to divers and even causing diving accidents. Second, underwater visibility is almost zero, requiring divers to use their arms to locate the pipe openings to be sealed before manually inserting the airbags, leading to lengthy underwater operations. Furthermore, in most wastewater treatment plants with depths of 5-6 meters, divers are also at risk of injury. Third, underwater diving is expensive, and the numerous pipe connections and temporary sealing tasks during the renovation process further increase construction costs.

[0004] Furthermore, some existing methods for inserting airbags into pipes for sealing involve using rigid structures such as fixing rods, fixing plates, and nuts to secure the airbag and allow it to move. This method is not only structurally complex and inconvenient to operate, but also restricts the movement of the airbag, resulting in a limited movement distance, slow movement, and displacement deviations. This prevents the airbag from moving quickly and accurately to the pipe opening, leading to low sealing efficiency. Moreover, the pushing force of the fixing rod alone is insufficient to completely insert the airbag into the pipe, thus failing to completely seal the pipe and resulting in poor sealing effectiveness. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a magnetically positioned water treatment structure sealing airbag and method to improve sealing efficiency, sealing effect, and safety during the sealing process.

[0006] On one hand, the present invention provides a water treatment structure sealing airbag based on magnetic positioning, including a cable, a power supply, and a retractable airbag body; one end of the airbag body is provided with a fixing rod fixedly connected thereto, and the other end is provided with an airbag front cover fixedly connected thereto; the end of the airbag front cover away from the airbag body is connected to several suction cup electromagnets through several elastic telescopic tubes; the fixing rod is a hollow rod and its end away from the airbag body is connected to an air compressor unit; the air compressor unit inflates or deflates the airbag body through the fixing rod, so that the airbag body expands or contracts.

[0007] The cable is threaded through the fixed rod, the airbag body, and the elastic telescopic tube. The power supply is connected to several suction cup electromagnets via several cables. The power supply is switched on to connect to the suction cup electromagnets so that the electromagnets generate electromagnetic force to adhere to the inner wall of the pipe to be sealed. The power supply is switched off to disconnect the electrical connection between the power supply and the suction cup electromagnets, thereby disconnecting the connection between the suction cup electromagnets and the pipe to be sealed.

[0008] The elastic telescopic tubes are of different lengths, so that the suction cup electromagnets connected to them are located at different positions inside the pipe to be sealed; the switches of the power supplies connected to the suction cup electromagnets are alternately turned on and off, and the thrust applied to the airbag body by the fixing rod is coordinated with the airbag body to completely enter the pipe to be sealed and seal it.

[0009] In one embodiment of the present invention, a connector is connected to one end of the airbag front cover away from the airbag body, and a plurality of the elastic telescopic tubes are connected to the connector.

[0010] In one embodiment of the present invention, the end of the fixing rod away from the airbag body is connected to a connecting hose via a quick connector. The connecting hose is connected to the air compressor unit, and the air compressor unit communicates with the interior of the airbag body in sequence via the connecting hose and the fixing rod. The connecting hose extends out of a cover plate provided above the upstream structure, and the air compressor unit and the power supply are both located above the cover plate.

[0011] In one embodiment of the present invention, the airbag body is provided with at least two airbag lugs, wherein the two airbag lugs are respectively connected to a first traction rope and a second traction rope, and a third traction rope is connected to the connector.

[0012] In one embodiment of the present invention, the fixing rod is integrally formed with the airbag body by adhesive bonding, and the airbag front cover is integrally formed with the connector by adhesive bonding.

[0013] In one embodiment of the present invention, both ends of the elastic telescopic tube are provided with external threads, one end of the suction cup electromagnet is provided with an internal thread that mates with the external thread of one end of the elastic telescopic tube, and one end of the connector is provided with an internal thread that mates with the external thread of the other end of the elastic telescopic tube; both ends of the elastic telescopic tube are respectively threadedly connected to the suction cup electromagnet and the connector.

[0014] In one embodiment of the present invention, a cable conduit is further included, one end of which is inserted into the elastic telescopic tube, and the other end is welded to a cable connector provided on the annular surface of the suction cup electromagnet; one end of the cable is connected to a power source, and the other end passes through a connecting hose, a quick connector, a fixing rod, an airbag body, a connector, an elastic telescopic tube, and the cable conduit, and is then connected to the coil of the suction cup electromagnet through the cable connector.

[0015] In one embodiment of the present invention, the airbag front cover is made of hard rubber, and the elastic telescopic tube is made of tough PVC pipe.

[0016] On the other hand, the present invention provides a method for sealing water treatment structures based on magnetic positioning, which utilizes a magnetically positioned water treatment structure sealing airbag. The method includes the following steps:

[0017] S1. Preparation: First, fasten the elastic telescopic tube to the suction cup electromagnet and connector using threaded connections; second, connect the fixing rod to the connecting hose through a quick connector, connect the connecting hose to the air blower unit, and connect the cable to the power supply.

[0018] S2. After the airbag is ready, it will be lowered into place by the cover plate set above the upstream structure, and by the four points of the fixed rod, the first traction rope, the second traction rope and the third traction rope. Mark the height of the pipe opening of the pipe to be sealed on the top of the upstream structure, and stop lowering when the pipe opening elevation is reached.

[0019] S3. Move the airbag to the side of the upstream structure using the traction rope and fixing rod. Alternately turn on and off the power switches connected to the two suction cup electromagnets. After the suction cup electromagnets are energized, they generate electromagnetic force and adhere to the inside of the pipe to be sealed. By pulling the traction rope, confirm that the suction cup electromagnets have been adhered to the inner wall of the pipe to be sealed at the top of the upstream structure.

[0020] S4. After confirming that the suction cup electromagnet at the near end has been attracted into the pipe, it indicates that the position of the airbag is parallel to the pipe inlet. At this time, turn on the air compressor unit and fill the airbag body with some gas, so that the airbag is cylindrical. At this time, the airbag is suspended in the water and incompressible due to the force of gravity, the buoyancy of water and the traction force of the fixing rod and the traction rope, so that the fixing rod can be pushed towards the pipe opening to be blocked.

[0021] S5. Push the fixing rod toward the opening of the pipe to be sealed. Since the suction cup electromagnet is already attached to the pipe wall, the elastic telescopic tube will shorten under the pressure of the fixing rod. At this time, the length of the elastic telescopic tube connected to the far-end suction cup electromagnet remains unchanged. Turn on the power switch of the far-end suction cup electromagnet and turn off the power switch of the near-end suction cup electromagnet. At this time, the electromagnetic force of the near-end suction cup electromagnet disappears, and the airbag is pushed into the pipe a certain length after compression.

[0022] S6. Repeat steps S5, alternately turning the power switch connected to the near and far suction cup electromagnets on and off, and apply thrust to the airbag body in conjunction with the fixing rod until the fixing rod is in close contact with the inner wall of the structure; at this time, the airbag has completely entered the pipe to be sealed.

[0023] S7. Continue to inflate the airbag and observe the pressure curve on the air compressor unit. Stop inflating when the set pressure range is reached. Continue inflating after the air pressure drops to maintain the tension between the airbag and the inner wall of the pipe to be sealed.

[0024] S8. The downstream of the pipe to be blocked is cut off and a temporary pipe is added to the outlet, and the outlet drains normally. At this time, the gas in the airbag is released. The airbag is still fixed in the pipe by the tension of the first traction rope and the second traction rope tied to the top of the structure and the magnetic attraction of the suction cup electromagnet. It will not be washed away by the water flow.

[0025] S9. After the downstream structure connected to the upstream structure via the pipe to be sealed is modified, the airbag is re-inflated and sealed, the temporary pipe is removed, and the pipe to be sealed is restored. After the pipe to be sealed is restored, the airbag is deflated, the power switch connected to the suction cup electromagnet is turned off, and the airbag is lifted to the water surface by the traction rope. The airbag sealing work is completed.

[0026] 10. A method for sealing water treatment structures based on magnetic positioning according to claim 9, characterized in that the set pressure range in step S7 is 0.3 MPa to 0.35 MPa.

[0027] The beneficial effects of this invention are:

[0028] 1. The water treatment structure sealing airbag and method provided by this invention utilizes the alternating magnetic attraction of multiple suction cup electromagnets to drive the airbag's movement. This driving force, combined with the thrust applied to the airbag body by the fixing rod, allows the airbag body to completely enter the pipe to be sealed, thereby improving the sealing effect. Furthermore, this airbag structure requires only one fixing rod, making it simple in design. During use, only the movement of the fixing rod and the switching of the power supply are required, making operation convenient. The airbag is unrestricted during movement, has a large moving distance, and can quickly and accurately move to the pipe opening, improving sealing efficiency.

[0029] 2. The magnetic positioning underwater sealing airbag and method provided by the present invention make full use of the characteristics of the process pipeline of sewage treatment plant being steel pipe, which can be attracted by a suction cup electromagnet. By adjusting the length of the traction rope and the magnetic attraction of the suction cup electromagnet, the airbag is attracted to the inside of the pipeline to be sealed.

[0030] 3. This invention fully utilizes the characteristic of suction cup electromagnets that generate strong magnetism when energized and lose magnetism when de-energized. By controlling the energization and de-energization of the suction cup electromagnet, the forward direction of the airbag can be fixed. At the same time, the adsorption effect of the suction cup electromagnet allows the airbag to be stably fixed in the pipe to be blocked during temporary water flow, avoiding the problem of low blocking efficiency caused by repeated positioning and blocking.

[0031] 4. The fixed push rod and three traction ropes of this invention, combined with the gravity of the airbag when it is not ventilated, can effectively deliver the airbag to the vicinity of the pipe opening; the airbag is unrestricted during movement, can move a large distance, and can be moved quickly and accurately to the pipe opening, improving the efficiency of the sealing work, and does not require personnel to drag it underwater, thus ensuring high safety and high work efficiency.

[0032] 5. After the airbag is in place, the present invention inflates it with gas, allowing the entire airbag to float in the water by means of a fixing rod, three traction ropes, and the airbag's own weight and buoyancy. At the same time, the airbag has a certain rigidity, which can ensure that the fixing rod can stably move the airbag into the pipe to be blocked. This makes the operation feasible and highly accurate, allowing the airbag to be precisely moved to the pipe opening.

[0033] 6. The magnetic positioning-based water treatment structure sealing airbag and method provided by this invention allows the sealing and other operations of the airbag to be completed above the structure, eliminating the need for manual sealing by divers. It also enables repeated use after a single positioning. This simplifies and standardizes underwater sealing operations, significantly reducing the cost of temporary sealing of various pipelines during wastewater treatment plant upgrades and greatly improving construction safety.

[0034] 7. The present invention connects the two ends of the elastic telescopic tube to the suction cup electromagnet and the connector respectively by thread, which makes the connection between the connector, the elastic telescopic tube and the suction cup electromagnet easy to disassemble and install, improves the ease of use of the sealing airbag of the water treatment structure and improves the sealing work efficiency. Attached Figure Description

[0035] Figure 1 A schematic diagram of a sealing airbag for a water treatment structure based on magnetic positioning provided by the present invention;

[0036] Figure 2 A schematic diagram of the water treatment structure sealing airbag provided by the present invention being installed in the structure to seal the pipe to be sealed;

[0037] Figure 3 This is a schematic diagram showing the initial insertion of the sealing airbag into the pipe opening of the water treatment structure provided by the present invention.

[0038] Figure 4 This is a schematic diagram showing the state of the sealing airbag portion of the water treatment structure provided by the present invention entering the pipe to be sealed.

[0039] Figure 5 This is a schematic diagram showing the water treatment structure sealing airbag provided by the present invention fixed inside the pipe to be sealed.

[0040] In the diagram: 1. Airbag body; 2. Airbag front cover; 3. Connector; 4. Cable conduit; 5. Suction cup electromagnet; 6. Elastic telescopic tube; 7. Airbag hook; 8. Fixing rod; 9. Quick connector; 10. Connecting hose; 11. Cable; 12. Air compressor unit; 13. Power supply; 14. First traction rope; 15. Second traction rope; 16. Third traction rope; 17. Upstream structure; 18. Downstream structure to be modified; 19. Temporary pipeline; 20. Pipeline to be sealed; 21. Cover plate. Detailed Implementation

[0041] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0044] Please refer to Figures 1-5 As shown, the present invention provides a water treatment structure sealing airbag based on magnetic positioning, including a cable 11, a power supply 13, and a retractable airbag body 1; one end of the airbag body 1 is provided with a fixing rod 8 fixedly connected thereto, and the other end is provided with an airbag front cover 2 fixedly connected thereto. The end of the airbag front cover 2 away from the airbag body 1 is connected to a plurality of suction cup electromagnets 5 through a plurality of elastic telescopic tubes 6; the fixing rod 8 is a hollow rod and its end away from the airbag body 1 is connected to an air compressor unit 12. The air compressor unit 12 inflates or deflates the airbag body 1 through the fixing rod 8, so that the airbag body 1 expands or contracts;

[0045] The cable 11 passes through the fixed rod 8, the airbag body 1, and the elastic telescopic tube 6. The power supply 13 is connected to a plurality of suction cup electromagnets 5 through a plurality of the cables 11 respectively. The switch of the power supply 13 is turned on to make it electrically connected to the suction cup electromagnets 5 so that the suction cup electromagnets 5 generate electromagnetic force to attract to the inner wall of the pipe 20 to be sealed after being energized. The switch of the power supply 13 is turned off to cut off the electrical connection between it and the suction cup electromagnets 5, thereby cutting off the connection between the suction cup electromagnets 5 and the pipe 20 to be sealed.

[0046] Among them, several of the elastic telescopic tubes 6 have different lengths, so that several suction cup electromagnets 5 connected to them are located at different positions in the pipe 20 to be sealed; several power supply 13 switches connected to the suction cup electromagnets 5 are alternately turned on and off, and the thrust applied to the airbag body 1 by the fixing rod 8 is coordinated to make the airbag body 1 completely enter the pipe 20 to be sealed so as to seal it.

[0047] In this embodiment, there are two of each of the suction cup electromagnet 5, the elastic telescopic tube 6, and the cable 11. Alternatingly turning the two power supply 13 switches connected to the suction cup electromagnet 5 on and off means turning on one power supply 13 switch connected to the suction cup electromagnet 5 and turning off the other power supply 13 switch connected to the suction cup electromagnet 5; then turning off the on power supply 13 switch and turning on the off power supply 13 switch, and repeating this process sequentially. In this way, the suction cup electromagnet 5 with the power supply 13 on generates an attractive force and adheres to the inner wall of the pipe 20 to be sealed, while the suction cup electromagnet 5 with the power supply 13 off is de-energized and no longer generates an attractive force. Thus, one of the two suction cup electromagnets 5 generates an adsorption force, while the other does not. The two are alternated in turn, causing the suction cup electromagnet 5 that generates an adsorption force to be de-energized to turn off its adsorption function. At the same time, the other suction cup electromagnet 5 that does not generate an adsorption force is energized to turn on its adsorption function. This process is repeated in the above order, so that the two suction cup electromagnets 5 can move within the pipe 20 to be blocked.

[0048] In this embodiment, the present invention controls the energization or de-energization of several suction cup electromagnets 5 by multiple switches on a power supply 13, or by multiple switches on multiple power supplies 13 respectively. No specific limitation is made in this regard.

[0049] The water treatment structure sealing airbag provided in this embodiment of the invention utilizes the alternating magnetic attraction of multiple suction-cup electromagnets 5 to drive the airbag's movement. This driving force, combined with the thrust applied to the airbag body 1 by the fixing rod 8, allows the airbag body 1 to completely enter the pipe 20 to be sealed, thereby improving the sealing effect. Furthermore, this airbag structure requires only one fixing rod 8, making it simple in design. During use, only the movement of the fixing rod 8 and the switching of the power supply 13 need to be controlled, making operation convenient. The airbag is unrestricted during movement, has a large moving distance, and can quickly and accurately move to the pipe opening, improving sealing efficiency.

[0050] It should be noted that the number of suction cup electromagnets 5, elastic telescopic tubes 6, and cables 11 can also be three, four, etc., and there is no specific limitation on this; several suction cup electromagnets 5 are equipped with elastic telescopic tubes 6 of different lengths.

[0051] Optionally, in some embodiments, the end of the airbag front cover 2 away from the airbag body 1 is connected to a connector 3, and a plurality of the elastic telescopic tubes 6 are connected to the connector 3.

[0052] Optionally, in some embodiments, the end of the fixing rod 8 away from the airbag body 1 is connected to a connecting hose 10 via a quick connector 9. The connecting hose 10 is connected to the air compressor unit 12, and the air compressor unit 12 communicates with the interior of the airbag body 1 in sequence via the connecting hose 10 and the fixing rod 8. The connecting hose 10 extends out onto a cover plate 21 provided above the upstream structure 17, and the air compressor unit 12 and the power supply 13 are both located above the cover plate 21.

[0053] In this embodiment, the sealing of the airbag is performed from above the structure, eliminating the need for manual sealing by divers. It also allows for repeated use after a single positioning. This simplifies and standardizes underwater sealing operations, significantly reducing the cost of temporary sealing of various pipelines during wastewater treatment plant upgrades and greatly improving construction safety.

[0054] Optionally, in some embodiments, the airbag body 1 is provided with at least two airbag lugs 7, wherein the two airbag lugs 7 are respectively connected to a first traction rope 14 and a second traction rope 15, and a third traction rope 16 is connected to the connector 3.

[0055] Optionally, in some embodiments, the fixing rod 8 is integrally formed with the airbag body 1 by adhesive bonding, and the airbag front cover 2 is integrally formed with the connector 3 by adhesive bonding.

[0056] Optionally, in some embodiments, both ends of the elastic telescopic tube 6 are provided with external threads, one end of the suction cup electromagnet 5 is provided with an internal thread that mates with the external thread of one end of the elastic telescopic tube 6, and one end of the connector 3 is provided with an internal thread that mates with the external thread of the other end of the elastic telescopic tube 6; the two ends of the elastic telescopic tube 6 are respectively threadedly connected to the suction cup electromagnet 5 and the connector 3.

[0057] In this embodiment, the two ends of the elastic telescopic tube 6 are threadedly connected to the suction cup electromagnet 5 and the connector 3, respectively, which makes the connection between the connector 3, the elastic telescopic tube 6 and the suction cup electromagnet 5 easy to disassemble and install, improving the ease of use of the sealing airbag of the water treatment structure and improving the sealing work efficiency.

[0058] Optionally, in some embodiments, a cable conduit 4 is also included, one end of which is inserted into the elastic telescopic tube 6, and the other end is welded to a cable connector provided on the annular surface of the suction cup electromagnet 5; one end of the cable 11 is connected to the power supply 13, and the other end passes through the connecting hose 10, quick connector 9, fixing rod 8, airbag body 1, connector 3, elastic telescopic tube 6 and cable conduit 4, and is then connected to the coil of the suction cup electromagnet 5 through the cable connector.

[0059] Optionally, the airbag front cover 2 is made of hard rubber, and the elastic telescopic tube 6 is made of tough PVC pipe.

[0060] It should be noted that the pipe 20 to be sealed is a steel pipe, which can be attracted by the suction cup electromagnet 5. The structure of this airbag makes full use of the characteristic that the process pipes of the sewage treatment plant are steel pipes, and can be attracted by the suction cup electromagnet 5. By adjusting the length of the traction rope and the magnetic attraction of the suction cup electromagnet 5, the airbag is attracted to the interior of the pipe 20 to be sealed.

[0061] Furthermore, the present invention also provides a method for sealing water treatment structures based on magnetic positioning, which utilizes the aforementioned airbag for sealing water treatment structures based on magnetic positioning, and includes the following steps:

[0062] S1. Preparation: First, fasten the elastic telescopic tube 6 to the suction cup electromagnet 5 and connector 3 with threaded connection; then connect the fixing rod 8 to the connecting hose 10 through the quick connector 9, connect the connecting hose 10 to the air blower unit 12, and connect the cable 11 to the power supply 13.

[0063] S2. After the airbag is ready (in the uninflated state), it is lowered into place by the cover plate 21 set above the upstream structure 17, and by the four points of the fixing rod 8, the first traction rope 14, the second traction rope 15 and the third traction rope 16. Mark the height of the pipe opening of the pipe to be blocked 20 on the top of the upstream structure 17, and stop lowering when the pipe opening elevation is reached.

[0064] S3. Move the airbag to the side of the upstream structure 17 using the traction rope and fixing rod 8, and alternately open and close the power supply 13 connected to the two suction cup electromagnets 5. After the suction cup electromagnets 5 are energized, they generate electromagnetic force and adhere to the inside of the pipe 20 to be sealed. By pulling the traction rope, confirm at the top of the upstream structure 17 that the suction cup electromagnets 5 have been adhered to the inner wall of the pipe 20 to be sealed.

[0065] S4. After confirming that the suction cup electromagnet 5 at the near end has been attracted into the pipe, it indicates that the position of the airbag is basically parallel to the pipe inlet. At this time, turn on the air compressor unit 12 and fill some gas into the airbag body 1, so that the airbag is cylindrical. At this time, the airbag is suspended in the water and has a certain degree of incompressibility due to the action of gravity, the buoyancy of water and the traction force of the fixing rod 8 and the traction rope. This is conducive to the next step of the fixing rod 8 being pushed towards the pipe opening of the pipe 20 to be blocked.

[0066] S5. Further push the fixing rod 8 toward the opening of the pipe 20 to be sealed. Since the suction cup electromagnet 5 has been adsorbed on the pipe wall, the elastic telescopic tube 6 is compressed and shortened after being squeezed by the fixing rod 8. At this time, the length of the elastic telescopic tube 6 connected to the suction cup electromagnet 5 at the far end remains unchanged. Turn on the power switch 13 of the far end suction cup electromagnet 5 and turn off the power switch 13 of the near end suction cup electromagnet 5. At this time, the electromagnetic force of the near end suction cup electromagnet 5 disappears, and the airbag is pushed into the pipe a certain length after compression.

[0067] S6. Repeat step S5, alternately turn the power supply 13 connected to the near and far suction cup electromagnets 5 on and off, and apply the thrust to the airbag body 1 with the fixing rod 8 until the fixing rod 5 is close to the inner wall of the structure; at this time the airbag has basically completely entered the pipe 20 to be sealed.

[0068] S7. Continue to inflate the airbag and observe the pressure curve on the air compressor unit 12. When the pressure reaches 0.3Mpa to 0.35Mpa, stop inflating. After the air pressure drops, continue to inflate to maintain the tension between the airbag and the inner wall of the pipe 20 to be sealed. At this point, the sealing is basically complete.

[0069] S8. The downstream of the pipe to be blocked 20 is cut off and a temporary pipe 19 is added to the outlet, and the outlet can drain normally. At this time, the gas in the airbag is released. The airbag is fixed in the pipe by the tension of the first traction rope 14 and the second traction rope 15 tied to the top of the structure and the magnetic attraction of the suction cup electromagnet 5. It will not be washed away by the water flow.

[0070] S9. After the downstream structure 18, which is connected to the upstream structure 17 via the pipe to be sealed 20, is modified, the airbag is re-inflated and sealed, and the temporary pipe 19 can be safely removed and the pipe to be sealed 20 restored. After the pipe to be sealed 20 is restored, the airbag is deflated, the power supply 13 connected to the suction cup electromagnet 5 is switched off, and the airbag is lifted to the water surface by the traction rope, and the airbag sealing work is completed.

[0071] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A sealing airbag for water treatment structures based on magnetic positioning, characterized in that, The device includes a cable, a power supply, and a retractable airbag body. One end of the airbag body is fixedly connected to a fixing rod, and the other end is fixedly connected to an airbag front cover. The end of the airbag front cover away from the airbag body is connected to several suction cup electromagnets via several elastic telescopic tubes. The fixing rod is a hollow rod, and the end away from the airbag body is connected to an air compressor unit. The air compressor unit inflates or deflates the airbag body through the fixing rod, causing the airbag body to expand or contract. The cable is threaded through the fixed rod, the airbag body, and the elastic telescopic tube. The power supply is connected to several suction cup electromagnets via several cables. The power supply is switched on to connect to the suction cup electromagnets so that the electromagnets generate electromagnetic force to adhere to the inner wall of the pipe to be sealed. The power supply is switched off to disconnect the electrical connection between the power supply and the suction cup electromagnets, thereby disconnecting the connection between the suction cup electromagnets and the pipe to be sealed. The elastic telescopic tubes are of different lengths, so that the suction cup electromagnets connected to them are located at different positions inside the pipe to be sealed; the switches of the power supplies connected to the suction cup electromagnets are alternately turned on and off, and the thrust applied to the airbag body by the fixing rod is coordinated with the airbag body to completely enter the pipe to be sealed and seal it.

2. The water treatment structure sealing airbag based on magnetic positioning according to claim 1, characterized in that, A connector is connected to one end of the airbag front cover away from the airbag body, and several elastic telescopic tubes are connected to the connector.

3. The water treatment structure sealing airbag based on magnetic positioning according to claim 2, characterized in that, The end of the fixing rod away from the airbag body is connected to a connecting hose via a quick connector. The connecting hose is connected to the air compressor unit. The air compressor unit communicates with the interior of the airbag body in sequence through the connecting hose and the fixing rod. The connecting hose extends out of a cover plate installed above the upstream structure. The air compressor unit and the power supply are both located above the cover plate.

4. The water treatment structure sealing airbag based on magnetic positioning according to claim 3, characterized in that, The airbag body is provided with at least two airbag lugs, wherein the two airbag lugs are respectively connected to a first traction rope and a second traction rope, and a third traction rope is connected to the connector.

5. A water treatment structure sealing airbag based on magnetic positioning according to claim 4, characterized in that, The fixing rod is integrally formed by gluing the airbag body, and the airbag front cover is integrally formed by gluing the connector.

6. A water treatment structure sealing airbag based on magnetic positioning according to claim 5, characterized in that, Both ends of the elastic telescopic tube are provided with external threads. One end of the suction cup electromagnet is provided with an internal thread that mates with the external thread of one end of the elastic telescopic tube. One end of the connector is provided with an internal thread that mates with the external thread of the other end of the elastic telescopic tube. The two ends of the elastic telescopic tube are respectively threadedly connected to the suction cup electromagnet and the connector.

7. A water treatment structure sealing airbag based on magnetic positioning according to claim 6, characterized in that, It also includes a cable conduit, one end of which is inserted into the elastic telescopic tube, and the other end is welded to a cable connector provided on the annular surface of the suction cup electromagnet; one end of the cable is connected to the power supply, and the other end passes through the connecting hose, quick connector, fixing rod, airbag body, connector, elastic telescopic tube and cable conduit, and then is connected to the coil of the suction cup electromagnet through the cable connector.

8. A water treatment structure sealing airbag based on magnetic positioning according to claim 1, characterized in that, The airbag front cover is made of hard rubber, and the elastic telescopic tube is made of tough PVC pipe.

9. A method for sealing water treatment structures based on magnetic positioning, characterized in that, The method employing the magnetically positioned water treatment structure sealing airbag according to any one of claims 1-8 comprises the following steps: S1. Preparation: First, fasten the elastic telescopic tube to the suction cup electromagnet and connector with threaded connection; second, connect the fixing rod to the connecting hose through the quick connector, connect the connecting hose to the air compressor unit, and connect the cable to the power supply. S2. After the airbag is ready, it will be lowered into place by the cover plate set above the upstream structure, and by the four points of the fixed rod, the first traction rope, the second traction rope and the third traction rope. Mark the height of the pipe opening of the pipe to be sealed on the top of the upstream structure, and stop lowering when the pipe opening elevation is reached. S3. Move the airbag to the side of the upstream structure using the traction rope and fixing rod. Alternately turn on and off the power switches connected to the two suction cup electromagnets. After the suction cup electromagnets are energized, they generate electromagnetic force and adhere to the inside of the pipe to be sealed. By pulling the traction rope, confirm that the suction cup electromagnets have been adhered to the inner wall of the pipe to be sealed at the top of the upstream structure. S4. After confirming that the suction cup electromagnet at the near end has been attracted into the pipe, it indicates that the position of the airbag is parallel to the pipe inlet. At this time, turn on the air compressor unit and fill the airbag body with some gas, so that the airbag is cylindrical. At this time, the airbag is suspended in the water and incompressible due to the force of gravity, the buoyancy of water and the traction force of the fixing rod and the traction rope, so that the fixing rod can be pushed towards the pipe opening to be blocked. S5. Push the fixing rod toward the opening of the pipe to be sealed. Since the suction cup electromagnet is already attached to the pipe wall, the elastic telescopic tube will shorten under the pressure of the fixing rod. At this time, the length of the elastic telescopic tube connected to the far-end suction cup electromagnet remains unchanged. Turn on the power switch of the far-end suction cup electromagnet and turn off the power switch of the near-end suction cup electromagnet. At this time, the electromagnetic force of the near-end suction cup electromagnet disappears, and the airbag is pushed into the pipe a certain length after compression. S6. Repeat step S5, alternately turning the power switch connected to the near and far suction cup electromagnets on and off, and apply thrust to the airbag body in conjunction with the fixing rod until the fixing rod is pressed against the inner wall of the structure; at this time, the airbag has completely entered the pipe to be sealed. S7. Continue to inflate the airbag and observe the pressure curve on the air compressor unit. Stop inflating when the set pressure range is reached. Continue inflating after the air pressure drops to maintain the tension between the airbag and the inner wall of the pipe to be sealed. S8. The downstream of the pipe to be blocked is cut off and a temporary pipe is added to the outlet, and the outlet drains normally. At this time, the gas in the airbag is released. The airbag is still fixed in the pipe by the tension of the first traction rope and the second traction rope tied to the top of the structure and the magnetic attraction of the suction cup electromagnet. It will not be washed away by the water flow. S9. After the downstream structure connected to the upstream structure via the pipe to be sealed is modified, the airbag is re-inflated and sealed, the temporary pipe is removed, and the pipe to be sealed is restored. After the pipe to be sealed is restored, the airbag is deflated, the power switch connected to the suction cup electromagnet is turned off, and the airbag is lifted to the water surface by the traction rope. The airbag sealing work is completed.

10. A method for sealing water treatment structures based on magnetic positioning according to claim 9, characterized in that, The set pressure range in S7 is 0.3MPa~0.35MPa.

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