Plugging devices for drainage systems

Abstract

The present disclosure relates to a plugging device for a drainage system, wherein the drainage system comprises a drainage pipe, an opening is arranged on the upper side wall of the drainage pipe, the plugging device comprises a connecting pipe, an air bag and a traction rope, the air bag is connected to the first end of the connecting pipe, the first end is adapted to extend into the drainage pipe through the opening, one end of the traction rope is adapted to be connected to the air bag, the other end of the traction rope is configured as an operating end, the operating end is adapted to be pulled by an operator to adjust the axial position of the air bag in the drainage pipe, and the air bag is arranged to be sealed and fitted with the inner wall of the drainage pipe after being inflated. The plugging device for a drainage system is used to plug the drainage pipe of the drainage system.

Description

Technical Field

[0001] The present disclosure relates to the technical field of drainage system plugging, and in particular, to a plugging device for a drainage system. Background Art

[0002] The drainage system in the factory is composed of ditches, collection wells, sewage pools, drain pipes, total collection pools (rainwater pools), and drainage pumps. The sewer collects wastewater into the total collection pool through the drain pipes. The total collection pool is the last collection pool before the wastewater is discharged. The water quality of the total collection pool must be qualified before it can overflow or be discharged through the drainage pump.

[0003] When unconventional situations occur, such as secret dumping, leakage of storage tanks or equipment, emergency discharge due to accidents, etc., the sewage source in the total collection pool is often not discovered in the first time, and it is difficult to isolate the sewage source in the first time. Sewage will continue to enter the total collection pool, and the total collection pool has a large amount of water and a deep depth. Afterwards, there are problems such as difficulty in cleaning water quality, long cleaning time, incomplete cleaning, and personal risks in cleaning operations. There is an urgent need for a sewage blocking device that can quickly isolate the drainage system. Utility Model Content

[0004] An object of the present disclosure is to provide a blocking device for a drainage system, which is used to block a drainage pipe of the drainage system when necessary.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a blocking device for a drainage system, wherein the drainage system includes a drainage pipe, an upper side wall of the drainage pipe is provided with an opening, the blocking device includes a connecting pipe, an airbag and a traction rope, the airbag is connected to a first end of the connecting pipe, the first end is suitable for extending into the drainage pipe through the opening, one end of the traction rope is suitable for being connected to the airbag, the other end of the traction rope is constructed as an operating end, the operating end is suitable for being pulled by an operator to adjust the axial position of the airbag in the drainage pipe, and the airbag is configured to be sealed and fitted with the inner wall of the drainage pipe after being inflated.

[0006] Optionally, the connecting pipe has a first section and a second section, the first section and the second section are rotatably connected via a rotating pin, and an end of the second section away from the first section is the first end;

[0007] The second section is configured to be rotatable relative to the first section when an operator pulls the operating end, thereby adjusting the axial position of the airbag in the drain pipe.

[0008] Optionally, a support rod is connected to the rotating pin shaft, and the traction rope is passed through the support rod.

[0009] Optionally, the first section, the second section and the support rod are all formed with through holes for the traction rope to pass through.

[0010] Optionally, the blocking device further comprises a connecting rod, wherein the connecting rod is arranged on the airbag, and an end of the second section away from the first section is formed into a hook-shaped structure connected to the connecting rod.

[0011] Optionally, the airbag is provided with two gripping ears, and the connecting rod is arranged between the gripping ears.

[0012] Optionally, a fluorescent area is provided on the airbag, and the fluorescent area is provided on a side of the airbag facing the opening, for showing the axial position of the airbag and the opening in the drain pipe.

[0013] Optionally, the fluorescent area includes a first fluorescent area and a second fluorescent area which are arranged concentrically, the first fluorescent area is arranged at the connection between the airbag and the connecting tube, the second fluorescent area is constructed as an annular area and is arranged on the periphery of the first fluorescent area, and the first fluorescent area and the second fluorescent area have different colors.

[0014] Optionally, the airbag is provided with an air port for inflating and deflating the airbag.

[0015] Optionally, the sealing device also includes an inflation tube, a pressure gauge and a fan, the fan is connected to one end of the inflation tube, the pressure gauge is connected to the inflation tube, the other end of the inflation tube is connected to the interior of the airbag, and the pressure gauge is used to detect the air pressure in the airbag.

[0016] Through the above technical solution, the airbag is connected to the first end of the connecting pipe, and the first end of the connecting pipe extends into the drain pipe through the opening. There is no need for operators to enter the inspection well, thereby ensuring the safety of the operators. One end of the traction rope is connected to the airbag, and the other end is constructed as an operating end for the operator to pull. The operator pulls the operating end of the traction rope to adjust the axial position of the airbag in the drain pipe. The airbag is configured to be sealed and fit with the inner wall of the drain pipe after inflation. In this way, the position of the airbag in the drain pipe can be adjusted to ensure that the airbag can achieve a blocking effect on the drain pipe after inflation. The inflated airbag is sealed and fits with the inner wall of the drain pipe, effectively isolating the sewage source end and the drainage end on both sides of the airbag, thereby achieving blocking of the drain pipe, thereby helping to quickly isolate the sewage in the drainage system when needed, and avoiding problems such as difficulty in cleaning water quality, long cleaning time, incomplete cleaning, and personal risks in cleaning operations caused by a large amount of sewage flowing into the total collection tank.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0019] Figure 1 is a schematic diagram of the use of a plugging device for a drainage system provided by an exemplary embodiment of the present disclosure;

[0020] Figure 2 is a schematic structural diagram of a plugging device for a drainage system provided by an exemplary embodiment of the present disclosure;

[0021] Figure 3 is a partial structural schematic diagram of a plugging device for a drainage system provided by an exemplary embodiment of the present disclosure;

[0022] Figure 4 It is a partial structural schematic diagram of a plugging device for a drainage system provided by an exemplary embodiment of the present disclosure.

[0023] Description of Reference Numerals

[0024] 1-drain pipe; 11-opening; 2-connecting pipe; 21-first section; 22-second section; 221-first end; 3-air bag; 31-grab ear; 32-fluorescent area; 321-first fluorescent area; 322-second fluorescent area; 33-air port; 4-traction rope; 41-operating end; 5-rotating pin; 51-support rod; 6-connecting rod; 7-inflating tube; 8-pressure gauge; 9-blower; 10-ball valve; 100-through hole. DETAILED DESCRIPTION

[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0026] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it can be directly on the other element or indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] In the present disclosure, unless otherwise indicated, directional words such as "upper" and "lower" are generally used in conjunction with the accompanying drawings (such as Figure 1) is defined by the drawing direction of the drain pipe, which is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present disclosure. "Inside and outside" refer to the inside and outside of the contour of the corresponding component. For example, inside the drain pipe refers to the hollow pipe inside the drain pipe. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be an internal connection between two elements or an interaction relationship between two elements; for ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0029] See also Figure 1-Figure 2 The present disclosure provides a plugging device for a drainage system, the drainage system includes a drainage pipe 1, an opening 11 is provided on the upper side wall of the drainage pipe 1, the plugging device includes a connecting pipe 2, an airbag 3 and a traction rope 4, the airbag 3 is connected to the first end 221 of the connecting pipe 2, the first end 221 is suitable for extending into the drainage pipe 1 through the opening 11, one end of the traction rope 4 is suitable for being connected to the airbag 3, and the other end of the traction rope 4 is constructed as an operating end 41, which is suitable for being pulled by an operator to adjust the axial position of the airbag 3 in the drainage pipe 1, and the airbag 3 is configured to be sealed and fitted with the inner wall of the drainage pipe 1 after being inflated.

[0030] Through the above technical solution, the airbag 3 is connected to the first end 221 of the connecting pipe 2, and the first end 221 of the connecting pipe 2 extends into the drain pipe 1 through the opening 11. There is no need for operators to enter the inspection well, thereby ensuring the safety of operators. One end of the traction rope 4 is connected to the airbag 3, and the other end is constructed as an operating end 41 for the operator to pull. The operator pulls the operating end 41 of the traction rope 4 to adjust the axial position of the airbag 3 in the drain pipe 1. The airbag 3 is configured to be sealed and fitted with the inner wall of the drain pipe 1 after inflation. In this way, the position of the airbag 3 in the drain pipe 1 can be adjusted to ensure that the airbag 3 can achieve a blocking effect on the drain pipe 1 after inflation. The inflated airbag 3 is sealed and fitted with the inner wall of the drain pipe 1, and the sewage source end and the drainage end on both sides of the airbag 3 are effectively isolated, thereby achieving blocking of the drain pipe 1.

[0031] Here, it is necessary to understand that the airbag 3 is configured to seal and fit with the inner wall of the drain pipe 1 after being inflated, that is, the diameter of the airbag 3 is larger than the diameter of the hollow tube inside the drain pipe 1. The specific size of the airbag 3 is determined according to the drain pipe 1 of the drainage system, thereby helping to quickly isolate the sewage in the drainage system and avoid problems such as difficulty in cleaning water quality, long cleaning time, incomplete cleaning, and personal risks in cleaning operations caused by a large amount of sewage flowing into the total collection pool.

[0032] The specific operation process can be as follows: when sewage is discharged from the factory drainage system or sewage is found to enter the total collection pool (rainwater pool), the operator can open the rainwater and sewage cellar cover closest to the total collection pool, that is, open the wellhead upstream of the total collection pool to expose the opening 11 on the upper side wall of the drain pipe 1. Select the corresponding size of the airbag 3 to ensure that the size of the airbag 3 is slightly larger than the diameter of the drain pipe 1 after being filled with air. The operator grasps the operating end 41 of the traction rope 4 and the connecting pipe 2 to slowly lower the airbag 3 from the opening 11, and adjusts the airbag 3 to a suitable position by operating the operating end 41 of the traction rope 4. After that, the airbag 3 can be inflated. The inflated airbag 3 will cut off the sewage from the drain pipe 1, and the sewage cannot continue to enter the total collection pool. The water quality of the total collection pool can be kept clean, avoiding the assessment of the Environmental Protection Department and the subsequent cleaning of the total collection pool. When the sewage source is treated and no sewage is discharged, the sewage previously blocked by the airbag 3 can be pumped away, and the airbag 3 can be deflated, and the sewage blocking work is completed.

[0033] In the present disclosure, the airbag 3 is configured as a thick-walled airbag. Since the airbag 3 is configured to be sealed and fitted with the inner wall of the drain pipe 1 after being inflated, the airbag 3 is in frictional contact with the inner wall of the drain pipe 1. After long-term use, the airbag 3 will be worn due to friction. By configuring it as a thick-walled airbag, the wear resistance of the airbag 3 can be effectively improved. In addition, the thick-walled airbag can reduce the risk of puncturing the airbag 3 due to sharp objects in the drain pipe 1, which is beneficial to increasing the service life of the airbag 3.

[0034] See also Figure 2 In one embodiment of the present disclosure, the connecting pipe 2 has a first section 21 and a second section 22, and the first section 21 and the second section 22 are rotatably connected via a rotating pin 5. The end of the second section 22 away from the first section 21 is a first end 221. The second section 22 is configured to be able to rotate relative to the first section 21 when the operator pulls the operating end 41, thereby adjusting the axial position of the airbag 3 in the drain pipe 1.

[0035] In the present disclosure, the first section 21 can be set as a long tube, and the second section 22 can be set as a short tube. In this way, the lever arm of the first section 21 operated by the operator is longer, which saves more effort when extending the airbag 3 into the drain pipe 1, and is conducive to the airbag 3 to enter the drain pipe 1 smoothly and accurately.

[0036] In the present disclosure, in order to facilitate the operation of the operator and reduce the cost, the material of the first section 21 is set to PVC, which is light and low in cost. Since the second section 22 needs to be inserted into the drain pipe 1 and the second section 22 is subjected to greater force, the material of the second section 22 is set to stainless steel, which is strong and corrosion-resistant, ensuring a stable connection while being suitable for the underwater environment of the drain pipe 1, effectively increasing the service life of the plugging device.

[0037] In other embodiments, the material of the first section 21 is not limited to PVC, and the material of the second section 22 is not limited to stainless steel, as long as the first section 21 and the second section 22 can be used normally.

[0038] See also Figure 1 and Figure 2 In one embodiment of the present disclosure, a support rod 51 is connected to the rotating pin 5, and a traction rope 4 is passed through the support rod 51. After the airbag 3 is extended into the drain pipe 1, by pulling the operating end 41 of the traction rope 4, the traction rope 4 passed through the support rod 51 uses the support rod 51 as a fulcrum, thereby driving the position of the airbag 3 in the drain pipe 1 to change, which is conducive to pulling the airbag 3 to a suitable position to enter the drain pipe 1.

[0039] See also Figure 1 and Figure 2 In order to facilitate the operation of the operator, the first section 21 of the connecting tube 2, the second section 22 of the connecting tube 2 and the support rod 51 are all formed with a through hole 100 for the traction rope 4 to pass through (the through hole 100 on the support rod 51 is not shown in the figure). The traction rope 4 enters the first section 21 from the operating end 41 of the first section 21 of the connecting tube 2, passes through the through hole 100 on the first section 21, enters the through hole 100 of the second section 22 of the connecting tube 2 through the through hole 100 on the support rod 51, and extends inside the second section 22 until it is connected to the airbag 3. Such a configuration is conducive to integrating the traction rope 4 and the connecting tube 2 into one body, which is convenient for the operator to operate.

[0040] The present disclosure does not limit the specific position of the through hole 100 in the connecting pipe 2. The through hole 100 may be disposed at a position of the connecting pipe 2 close to the support rod 51 or at other positions of the connecting pipe 2 to facilitate operation by operators.

[0041] like Figure 1 and Figure 2As shown, two through holes 100 are provided on the side wall of the first section 21 of the connecting tube 2, and the two through holes 100 are arranged axially at intervals in the first section 21. A through hole 100 is provided on the side wall of the second section 22 of the connecting tube 2. At this time, the winding method of the traction rope 4 can be: one end of the traction rope 4 extends from the outside of the first section 21 into the inside of the first section 21 through a through hole 100, and passes through the first section 21 through another through hole 100 on the first section 21, and then extends from the outside of the second section 22 into the inside of the second section 22 through the through hole 100 on the second section 22, and then is connected to the connecting rod 6.

[0042] See also Figure 1-Figure 3 The blocking device further includes a connecting rod 6, which is arranged on the airbag 3. The end of the second section 22 away from the first section 21 is formed into a hook-shaped structure connected to the connecting rod 6. In this way, the connecting rod 6 arranged on the airbag 3 facilitates the connection between the second section 22 and the airbag 3. The second section 22 and the traction rope 4 will both apply tension to the airbag 3, which can effectively share the tension on the traction rope 4, thereby preventing the traction rope 4 from breaking or loosening. At the same time, the end of the second section 22 connected to the connecting rod 6 is formed into a hook-shaped structure. When the airbag 3 is pulled, the airbag 3 rotates slightly relative to the second section 22, and the connecting rod 6 arranged on the airbag 3 rotates synchronously. The hook-shaped structure of the second section 22 can effectively reduce the friction between the connecting rod 6 and the second section 22 when the connecting rod 6 rotates.

[0043] In the present disclosure, two grab ears 31 are provided on the airbag 3, and the connecting rod 6 is provided between the grab ears 31. The two grab ears 31 provided on the airbag 3 are convenient for the operator to take the airbag 3, and the connecting rod 6 is provided between the two grab ears 31, and the end of the traction rope 4 connected to the airbag 3 is connected to the connecting rod 6, and the second section 22 is connected to the connecting rod 6, which is conducive to the stable connection between the airbag 3 and the traction rope 4 and the second section 22.

[0044] In order to facilitate the operator to determine the position of the airbag 3 in the drain pipe 1, a fluorescent area 32 is provided on the airbag 3. The fluorescent area 32 is provided on the side of the airbag 3 facing the opening 11, and is used to show the axial position of the airbag 3 in the drain pipe 1 relative to the opening 11. Since the drain pipe 1 is a dark environment, when the plugging device is placed in the drain pipe 1, even if the airbag 3 is illuminated by a lighting device, the operator cannot accurately determine whether the airbag 3 has reached a suitable plugging position due to the small volume of the uninflated airbag 3. The fluorescent area 32 is provided on the side of the airbag 3 facing the opening 11. When the airbag 3 is illuminated by a lighting device, the fluorescent area 32 will show fluorescence, and the operator can quickly and accurately determine the position of the airbag 3 by visual inspection.

[0045] In other embodiments of the present disclosure, the airbag 3 may be made of a luminescent material, and the operator can visually determine the relative position between the luminescent portion and the drain pipe 1 to confirm whether the airbag 3 has reached a suitable blocking position.

[0046] See also Figure 2-Figure 3 In one embodiment of the present disclosure, the fluorescent area 32 includes a first fluorescent area 321 and a second fluorescent area 322 which are concentrically arranged. The first fluorescent area 321 is arranged at the connection between the airbag 3 and the connecting tube 2. The second fluorescent area 322 is constructed as an annular area and is arranged on the periphery of the first fluorescent area 321. The colors of the first fluorescent area 321 and the second fluorescent area 322 are different.

[0047] Since the first fluorescent area 321 is arranged at the connection between the airbag 3 and the connecting pipe 2, and the second fluorescent area 322 is constructed as an annular area and is arranged on the periphery of the first fluorescent area 321, when the plugging device is placed into the drain pipe 1, the operator can see the complete first fluorescent area 321 and part of the second fluorescent area 322 from top to bottom. After the airbag 3 reaches the opening 11 of the drain pipe 1, the traction rope 4 is pulled to rotate the airbag 3 to a position suitable for entering from the opening 11. During the process of the airbag 3 entering the drain pipe 1, the operator gradually loses the ability to observe the second fluorescent area 322, and then the first fluorescent area 321 gradually disappears from the operator's field of vision. The operator determines the axial position of the airbag 3 in the drain pipe 1 by visually observing the changes in the first fluorescent area 321 and the second fluorescent area 322. By setting two fluorescent areas with different positions and colors on the airbag 3, it can help judge whether the position of the airbag 3 is in place and the inflation and deflation of the airbag 3 during the process, and there is no need to arrange people to go down the pit to observe and adjust.

[0048] Among them, the present disclosure does not limit the specific colors of the first fluorescent area 321 and the second fluorescent area 322. Optionally, the fluorescent material on the first fluorescent area 321 can be a red fluorescent material, that is, the color of the first fluorescent area 321 is red, and the fluorescent material on the second fluorescent area 322 can be a blue fluorescent material, and the color of the second fluorescent area 322 is blue.

[0049] In the present disclosure, the airbag 3 is provided with an air port 33 for inflating and deflation of the airbag 3. When the airbag 3 is needed, the airbag 3 is inflated through the air port 33, and when not in use, the air inside the airbag 3 is released through the air port 33, which is convenient for storage and transportation of the airbag 3.

[0050] It should be understood that the air port 33 is disposed on a side of the airbag 3 facing the opening 11 , so as to facilitate inflating the airbag 3 after the airbag 3 enters a suitable position in the drain pipe 1 .

[0051] See also Figure 1-Figure 4The blocking device further includes an air filling tube 7, a pressure gauge 8 and a fan 9. The fan 9 is connected to one end of the air filling tube 7. The pressure gauge 8 is connected to the air filling tube 7. The other end of the air filling tube 7 is connected to the inside of the air bag 3. The pressure gauge 8 is used to detect the air pressure in the air bag 3 to determine the amount of air in the air bag 3. In this way, the pressure gauge 8 on the air filling tube 7 is observed during the process of inflating the air bag 3, and the amount of air in the air bag 3 is determined by the air pressure value. After reaching the preset pressure, the fan 9 is turned off and the position of the air bag 3 is determined by visually observing the position change of the first fluorescent area 321 and the second fluorescent area 322 on the air bag 3. If no water flows out of the opening 11 of the drain pipe 1, the drain pipe 1 is blocked.

[0052] Among them, the inflation tube 7 is set as a high-pressure inflation tube 7. Since the airbag 3 will be subjected to a certain water pressure when entering the drainage pipe 1, compressed air needs to be flushed into the inflation tube 7 through the fan 9. Setting the inflation tube 7 as a high-pressure inflation tube 7 is beneficial to improving the safety of use and ensuring the inflation efficiency of the airbag 3.

[0053] In one embodiment of the present disclosure, a ball valve 10 is provided at the connection between the blower 9 and the inflation tube 7 , and the ball valve 10 is used to achieve rapid opening and closing, which is conducive to timely connection or disconnection of inflation of the airbag 3 .

[0054] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0056] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A plugging device for a drainage system, the drainage system comprising a drainage pipe, the upper side wall of the drainage pipe being provided with an opening, characterized in that: The blocking device includes a connecting tube, an airbag and a traction rope, wherein the airbag is connected to a first end of the connecting tube, and the first end is suitable for extending into the drain pipe through the opening, one end of the traction rope is suitable for being connected to the airbag, and the other end of the traction rope is constructed as an operating end, and the operating end is suitable for being pulled by an operator to adjust the axial position of the airbag in the drain pipe, and the airbag is configured to seal and fit with the inner wall of the drain pipe after being inflated.

2. The plugging device for a drainage system according to claim 1, characterized in that: The connecting pipe comprises a first section and a second section, the first section and the second section are rotatably connected via a rotating pin, and an end of the second section away from the first section is the first end; The second section is configured to be rotatable relative to the first section when an operator pulls the operating end, thereby adjusting the axial position of the airbag in the drain pipe.

3. The plugging device for a drainage system according to claim 2, characterized in that: The rotating pin is connected with a support rod, and the traction rope is passed through the support rod.

4. The blocking device for drainage system according to claim 3, characterized in that: The first section, the second section and the support rod are all formed with through holes for the traction rope to pass through.

5. The plugging device for drainage system according to claim 2, characterized in that: The blocking device further comprises a connecting rod, which is arranged on the airbag, and one end of the second section away from the first section is formed into a hook-shaped structure connected to the connecting rod.

6. The blocking device for drainage system according to claim 5, characterized in that: The airbag is provided with two gripping ears, and the connecting rod is arranged between the gripping ears.

7. The plugging device for a drainage system according to claim 1, characterized in that: A fluorescent area is provided on the airbag, and the fluorescent area is provided on a side of the airbag facing the opening, and is used to show the axial position of the airbag and the opening in the drain pipe.

8. The plugging device for a drainage system according to claim 7, characterized in that: The fluorescent area includes a first fluorescent area and a second fluorescent area which are arranged concentrically. The first fluorescent area is arranged at the connection between the airbag and the connecting tube. The second fluorescent area is constructed as an annular area and is arranged at the periphery of the first fluorescent area. The colors of the first fluorescent area and the second fluorescent area are different.

9. The plugging device for a drainage system according to claim 1, characterized in that: The airbag is provided with an air port for inflating and deflation of the airbag.

10. The plugging device for a drainage system according to any one of claims 1 to 9, characterized in that: The blocking device also includes an inflation tube, a pressure gauge and a fan, wherein the fan is connected to one end of the inflation tube, the pressure gauge is connected to the inflation tube, the other end of the inflation tube is connected to the interior of the airbag, and the pressure gauge is used to detect the air pressure in the airbag.

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