Air bag plugging structure of tidal zone water-passing culvert pipe and implementation method of air bag plugging structure

Abstract

The invention relates to an air bag plugging structure of a tidal zone water passing culvert pipe and an implementation method of the air bag plugging structure. The air bag plugging structure comprises an inflation air bag structure, inflation equipment, a culvert pipe opening protection structure and a traction fixing structure. The inflatable air bag structure is arranged in the water culvert pipe and comprises an inflatable air bag, a first plug and a second plug, wherein the first plug and the second plug are arranged at the two ends of the inflatable air bag. An inflation hose is arranged on the second plug, and the inflation hose is used for being communicated with inflation equipment; the two ends of the inflatable air bag structure are connected to the traction fixing structures correspondingly, and the traction fixing structures are connected to the culvert pipe opening protection structure. The culvert pipe opening protection structures are arranged at the two ends of the water passing culvert pipe and used for intercepting garbage and marine organisms in water from entering the water passing culvert pipe. The rapid plugging device has the advantages that through the arrangement of the inflatable airbag structure, the culvert pipe opening protection structure and the traction fixing structure, rapid plugging of the water-passing culvert pipe in the tidal zone can be achieved, and the functions of bearing bidirectional water head pressure and repeatedly opening and closing can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy and water transport engineering, and relates to an air bag blocking structure of a culvert passing through a tidal area and an implementation method thereof. Background Art

[0002] For water conservancy and water transport projects implemented offshore, temporary internal water systems are often formed in the project area. In order to maintain the ecology of the internal water system, the internal water system needs to be connected to the open sea to ensure the circulation of the water system. However, when the internal water system is polluted due to construction or other circumstances, the connecting channel should be closed quickly to prevent pollutants from leaking into the open sea and affecting the marine ecology. After the pollutants are disposed of, the channel will be reconnected to maintain the circulation of the water system. Due to its good economy and applicability, water culverts are often used as water system connecting channels in engineering.

[0003] The culverts installed in tidal areas are affected by tidal fluctuations and need to bear bidirectional water heads during culvert plugging. Considering the diffusion efficiency of pollutants in the water, the culvert plugging structure must have the functions of bearing bidirectional water heads, rapid plugging, and repeated opening and closing. Conventional technical measures such as steel flap doors and bagged soil plugging in engineering cannot meet the above requirements.

[0004] At present, airbag pipeline plugging has been widely used, mainly in the fields of municipal pipeline repair and pipeline inspection, etc., for temporary plugging of upstream and downstream ports of the repaired or inspected pipeline to form a relatively closed dry land working area.

[0005] Airbag pipe plugging is rarely used in the field of water conservancy and water transport engineering technology. The plugging structure of the pipe culvert set in the tidal area needs to be able to bear two-way water head, repeated opening and closing, and rapid plugging. Therefore, compared with the existing airbag plugging related technology, its usage scenarios and functional requirements have changed significantly, and targeted improvement and optimization are needed. Summary of the invention

[0006] The object of the present invention is to solve the above problems existing in the prior art and to provide an air bag plugging structure for a tidal area water culvert and an implementation method thereof.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] An airbag plugging structure for a tidal area water-passing culvert comprises a dike structure and a water-passing culvert arranged in the dike structure, and also comprises an inflatable airbag structure, an inflating device, a culvert opening protection structure and a traction fixing structure; the inflatable airbag structure is arranged in the water-passing culvert, comprises an inflatable airbag, and a first plug and a second plug respectively fixedly arranged at two ends of the inflatable airbag; the second plug is provided with an inflatable hose, and the inflatable hose is used to connect the inflatable device;

[0009] The first plug and the second plug are both fixedly provided with pull rings, the pull rings are connected to one end of the traction and fixing structure, and the other end of the traction and fixing structure is connected to the culvert opening protection structure, which is used to fix the inflatable airbag in the water culvert by traction; the culvert opening protection structure is set at both ends of the water culvert, and is used to intercept water garbage and marine life from entering the water culvert.

[0010] Preferably, a protective steel pipe is fixedly installed on the side slope of the embankment structure, wherein one end of the inflation hose is connected to the second plug on the inflation airbag, and the other end passes through the protective steel pipe and is connected to the inflation device.

[0011] Preferably, the second plug is provided with an air inlet, one end of the air inlet is connected to the inflatable airbag, and the other end of the air inlet is also connected to the inflatable hose.

[0012] Preferably, the inflation hose is installed with a pressure gauge, a stop valve and a gas pressure reducing valve at one end close to the inflation device; wherein the pressure gauge is used to monitor the pressure inside the inflatable airbag structure in real time; the stop valve is used to open and close the connection between the inflatable airbag structure and the outside world to maintain the pressure inside the inflatable airbag structure; the gas pressure reducing valve is used to control the pressure inside the inflatable airbag structure to be lower than the maximum working air pressure to ensure inflation safety.

[0013] Preferably, the traction fixing structure is composed of a traction rope and hanging rings arranged at both ends of the traction rope; the hanging rings are used to connect the pull ring; and the two ends of the traction rope are respectively connected to the inflatable airbag and the culvert opening protection structure.

[0014] Preferably, the length of the traction rope should be the length from the end of the inflatable airbag structure to the adjacent side pipe opening of the water culvert + the surplus length.

[0015] Preferably, the "surplus length" is 1-2 times the diameter of the water culvert.

[0016] Preferably, the culvert mouth protection structure consists of a porous grating plate, a connecting ring, a connecting plate and a fixed structure; wherein the connecting ring is fixedly arranged at the lower end of the porous grating plate; one end of the connecting plate is fixedly connected to the top of the porous grating plate, and the other end is connected to the fixed structure through a rotating shaft; wherein the fixed structure is fixedly connected to the pipe mouth of the water culvert.

[0017] Preferably, the connecting ring is connected to one end of the hanging ring on the traction fixing structure, and the porous grating plate is rotated around the rotating shaft on the fixing structure by pulling the other end of the traction fixing structure, so as to realize the opening or closing of the water culvert pipe opening by the culvert opening protection structure.

[0018] Another object of the present invention is to provide a method for implementing air bag plugging of culverts in tidal areas.

[0019] In order to achieve the above second purpose, the technical solution adopted by the present invention is:

[0020] A method for implementing air bag plugging of a tidal area water culvert, the method comprising the following steps:

[0021] S1: Preparation before plugging: Determine the specifications of the inflatable airbag according to the inner diameter of the water culvert and the maximum tidal range of the sea area, check the air tightness of the inflatable airbag, clean up the garbage, attached marine organisms and protrusions on the inner wall of the water culvert, and ensure that the inner wall of the culvert is clean;

[0022] S2: Installation of protective structure: Installation is carried out during the low tide period in the sea area, and culvert opening protective structures are installed at both ends of the culvert, and the culvert opening protective structures are kept open, and protective steel pipes are installed on the side of the embankment;

[0023] S3: Inflatable airbag accessories connection: The two ends of the inflatable airbag are connected to the traction fixing structure, the inflatable hose is inserted into the protective steel pipe, one end of the inflatable hose is connected to the air inlet of the inflatable airbag, and the other end is connected to the pressure gauge, the air stop valve and the gas pressure reducing valve, and connected to the inflation equipment;

[0024] S4: Inflatable airbag into the water culvert: During the low tide period in the sea area, put the connected inflatable airbag and its accessories into the designed position in the water culvert, connect the traction fixing structures at both ends of the inflatable airbag to the culvert opening protection structure, and close the culvert opening protection structure;

[0025] S5: Water culvert plugging process: Keep the air stop valve open, turn on the inflation device and provide positive pressure until the pressure in the airbag reaches the working pressure. The pressure in the airbag can be maintained in the following two ways: one is to close the air stop valve to maintain the pressure in the inflated airbag, and pay attention to the pressure gauge. When the pressure in the airbag drops to the lower limit of the working pressure, open the air stop valve and add air through the inflation device; the other is to keep the air stop valve open, the inflation device continues to inflate, and the pressure in the airbag is maintained within the working pressure range through the gas pressure reducing valve;

[0026] S6: Water culvert connection process: keep the air stop valve open, turn on the inflation device and provide negative pressure until the gas in the airbag is completely discharged to a negative pressure state, close the air stop valve, and maintain the small volume state of the inflated airbag under negative pressure;

[0027] S7: Replacement of damaged accessories: During low tide in the sea area, open the culvert mouth protection structure at both ends of the culvert, cancel the connection between the airbag fixing structure and the culvert mouth protection structure, remove the inflatable airbag and accessories from the culvert, replace the damaged accessories and reinstall them into the culvert, and close the culvert mouth protection structure.

[0028] Due to the adoption of the above technical solution, the beneficial effects obtained by the present invention include:

[0029] The present invention has a simple structure and is easy to operate. Through the arrangement of an inflatable airbag structure, a culvert opening protection structure and a traction fixing structure, it can not only realize the rapid blocking of the water-passing culvert in the tidal zone, but also realize the functions of bearing bidirectional water head pressure and repeated opening and closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional state diagram of an air bag plugging structure of a tidal zone water culvert when in use according to the present invention.

[0031] Figure 2 The invention is a cross-sectional schematic diagram of an air bag plugging structure of a tidal zone water culvert when in use.

[0032] Figure 3 It is a schematic diagram of the connection between the inflatable airbag structure, the inflatable hose and accessories in the present invention.

[0033] Figure 4 It is a schematic diagram of the connection between the inflatable airbag structure and the traction fixing structure in the present invention.

[0034] Figure 5 It is a schematic diagram of the culvert opening protection structure in the present invention.

[0035] Figure 6 It is a schematic diagram of the connection between the double-inflatable airbag structure and the traction fixing structure in the present invention.

[0036] The reference numerals are as follows:

[0037] 1. Water-passing culvert; 2. Levee structure; 3. Inflatable airbag structure; 31. Inflatable airbag; 32. First plug; 33. Second plug; 4. Culvert mouth protection structure; 41. Perforated grating plate; 42. Connecting ring; 43. Connecting plate; 44. Fixed structure; 5. Traction fixing structure; 51. Connecting rope; 52. Hanging ring; 6. Inflatable hose; 61. Pressure gauge; 62. Connecting piece; 63. Air stop valve; 64. Gas pressure reducing valve; 7. Protective steel pipe; 8. Inflatable equipment. DETAILED DESCRIPTION

[0038] See also Figure 1 , Figure 2 As shown, the embodiment of the present invention discloses an airbag plugging structure for a tidal area water culvert, comprising a dike structure and a water culvert arranged in the dike structure, the airbag plugging structure also comprising an inflatable airbag structure 3, a culvert opening protection structure 4, a traction fixing structure 5, an inflatable hose 6, a protection steel pipe 7, and an inflating device 8;

[0039] Among them, the inflatable airbag structure 3 is arranged at a predetermined position in the water culvert 1; the culvert opening protection structure 4 is fixedly installed on the pipe openings at both ends of the water culvert 1, and is used to intercept water garbage and marine life from entering the water culvert; the protective steel pipe 7 is fixedly installed on the slope of the side of the levee structure 2, with its top extending to the top of the levee and its bottom extending to the middle of the water culvert. After the inflatable hose is led out of the water culvert, it is routed from the protective steel pipe and extends to the top of the levee; the setting of the protective steel pipe can protect the inflatable hose 6 exposed on the side of the levee, slow down the aging of the inflatable hose due to light, and avoid damage to the inflatable hose due to external force.

[0040] In this embodiment, both ends of the inflatable airbag structure 3 are detachable and connected to one end of the traction fixing structure 5, and the other end of the traction fixing structure 5 is also detachable and connected to the culvert opening protection structure 4. Through the above measures, the inflatable airbag structure 3 is fixed at a predetermined position in the water-passing culvert 1, and tension is provided to both ends of the inflatable airbag structure 3 to bear the bidirectional water pressure or bidirectional water flow force generated by tidal fluctuations. One end of the inflatable hose 6 is connected to the air inlet of the inflatable airbag structure 3, and the other end passes through the protection steel pipe 7 and is connected to the inflatable device 8.

[0041] The process of sealing the water culvert: the inflation device 8 provides positive pressure to the inflatable airbag structure 3 until the inflatable airbag structure 3 reaches the working pressure and completely seals the water culvert 1, and maintains the gas pressure in the inflatable airbag structure 3 within the working pressure range.

[0042] The connection process of the water culvert is as follows: the inflation device 8 provides negative pressure to the inflatable airbag structure 3 until the gas in the inflatable airbag structure 3 is emptied and the negative pressure state is maintained, and the volume of the inflatable airbag structure 3 is maintained in a reduced state.

[0043] By adopting the above technical solution, the water culvert can be conveniently and quickly blocked or connected.

[0044] See also Figure 3 The inflation hose 6 is installed with a pressure gauge 61, a stop valve 63 and a gas pressure reducing valve 64 at one end close to the inflation device 8; the pressure gauge 61 is used to monitor the pressure in the inflatable airbag structure 3 in real time; the stop valve 63 can control the connection or closure of the inflation hose by opening and closing; the gas pressure reducing valve 64 is used to control the pressure in the inflation hose.

[0045] Specifically: the pressure gauge 61 can monitor the pressure value in the inflatable airbag 31 in real time. When the pressure of the inflatable airbag 21 is lower than the working pressure, air can be replenished in time; the air stop valve 63 is closed when the airbag is inflated and evacuated, and is used to maintain the pressure in the airbag to keep the airbag in an inflated or compressed state; the gas pressure reducing valve is used to limit the maximum pressure in the inflatable airbag. When the pressure exceeds the design threshold, the gas pressure reducing valve starts to exhaust and reduce pressure to avoid the inflatable airbag from bursting, thereby ensuring construction safety.

[0046] See also Figure 4 , the two ends of the inflatable airbag structure 3 are detachable and connected to the traction fixing structure 5. Among them, the inflatable airbag structure 3 is composed of an inflatable airbag 31 and a first plug 32 and a second plug 33 arranged at both ends, and the second plug is provided with an air inlet (for the sake of simplicity, it is not clearly drawn in the figure), one end of the air inlet is connected to the inflatable airbag, and the other end is also connected to the inflatable hose; the traction fixing structure 5 is composed of a traction rope 51 and a hanging ring 52 (hanging ring with opening and closing function) arranged at both ends of the traction rope; and the first plug 32 and the second plug 33 should be equipped with a pull ring for connecting the hanging ring 52; the hanging ring 52 should have a convenient opening and closing function to facilitate the connection and disassembly of the components; by adopting the above technical solution, the traction fixing structure can fix the inflatable airbag by connecting the pull rings on the first plug and the second plug, and provide tension for the inflatable airbag to maintain the stability of the inflatable airbag;

[0047] Furthermore, the traction rope 51 should have sufficient strength and toughness, and the length of a single traction rope 51 is the distance from the end of the inflatable airbag 31 to the culvert opening protection structure 4 + the surplus length; and the "surplus length" is 1 to 2 times the diameter of the water-passing culvert.

[0048] In addition, the regular rise and fall of the open sea tide will cause the internal water system and the open sea to form a two-way water head. In the blocked state, the inflatable airbag 31 needs to bear the two-way water pressure, and in the connected state, the inflatable airbag 31 needs to bear the two-way water flow force; and the traction fixing structure 5 arranged at both ends of the inflatable airbag 31 can provide pulling force for the inflatable airbag to bear the two-way water flow force and the two-way water pressure; specifically: one end of the traction fixing structure 5 is connected to the inflatable airbag, and the other end is connected to the culvert mouth protection structure, and the pulling force provided for the inflatable airbag 31 is transmitted to the culvert mouth protection structure; the culvert mouth protection structure 4 is fixedly connected to the water-passing culvert mouth to bear the pulling force transmitted by the traction fixing structure 5.

[0049] In this embodiment, the inflation device 8 should have the function of outputting positive pressure and negative pressure; and in the process of blocking the water culvert, the inflation device 8 outputs positive pressure gas to make the inflatable airbag reach the working pressure and block the water culvert; in the process of connecting the water culvert, the inflation device 8 outputs negative pressure, evacuates the gas in the inflatable airbag and maintains a certain negative pressure, so that the inflatable airbag 31 remains in a compressed state, reducing the water resistance of the inflatable airbag.

[0050] See also Figure 5 The culvert mouth protection structure 4 is composed of a porous grating plate 41, a connecting ring 42, a connecting plate 43 and a fixing structure 44; the connecting ring 42 is fixedly arranged at the lower end of the porous grating plate 41; one end of the connecting plate 43 is fixedly connected to the top of the porous grating plate 41, and the other end is connected to the fixing structure 44 through a rotating shaft, and the fixing structure 44 is fixedly connected to the pipe mouth of the water culvert 1.

[0051] In this embodiment, the connecting ring 42 is connected to one end of the hanging ring on the traction fixing structure, and the porous grid plate 41 is rotated around the rotating shaft on the fixing structure 44 by pulling the other end of the traction fixing structure 5, so as to realize the opening or closing of the culvert 1 by the culvert opening protection structure 4.

[0052] In this embodiment, the culvert opening protection structure 5 should have high water permeability and good interception performance, and a porous grid structure may be adopted.

[0053] As a preferred solution, the culvert opening protection structure 4 should have an opening and closing function. During the operation of the structure, the culvert opening protection structure is maintained in a closed state. During the structural maintenance or component replacement, the culvert opening protection structure is maintained in an open state.

[0054] Furthermore, the porous grille structure should provide a connection position for the inflatable airbag fixing structure, and the grille holes at the connection should be strengthened.

[0055] Through the above technical solution, it is possible to prevent garbage and attached marine organisms in the water from entering the water culvert during water flow, thereby avoiding damage to the inflatable airbag and affecting the water tightness of the airbag seal, thereby ensuring that the sealing structure is reliable.

[0056] See also Figure 6 In order to improve the reliability of the airbag sealing structure of the water culvert, a double inflatable airbag can be arranged in the water culvert 1. The double inflatable airbag adopts a component connection method of "traction fixing structure 5 + inflatable airbag structure 3 + traction fixing structure 5 + inflatable airbag structure 3 + traction fixing structure 5". It should be ensured that one end of the inflatable airbag structure 3 with the inflation port plug 33 is facing the adjacent pipe port direction of the water culvert 1 to ensure that the inflation hose 6 and the inflatable airbag 31 do not cross.

[0057] It should be noted that the present invention has a simple structure and is easy to operate. It can not only realize the rapid sealing of the culvert in the tidal zone, but also realize the functions of bearing bidirectional head pressure and repeated opening and closing. In addition, the materials used in the airbag sealing structure in this embodiment are all located in the seawater or in the water level change zone of the seawater, and the materials used in the structure should also consider increasing the material anti-corrosion measures within the design service life.

[0058] Example 2

[0059] See again Figure 1 , Figure 2 As shown, the present invention also proposes an air bag plugging implementation method for a tidal area water culvert, comprising the following steps:

[0060] S1: Preparation before plugging: Determine the specifications of the inflatable airbag structure 3 according to the inner diameter of the water culvert 1 and the maximum tidal range in the sea area; check the air tightness of the inflatable airbag structure 3 to ensure that the air tightness of the inflatable airbag structure 3 is good and the surface is clean. During the low tide period in the sea area, use underwater operations to clean up garbage, attached marine organisms, protruding burrs, stones and other sharp objects in the water culvert 1 to ensure that the water culvert 1 is clean.

[0061] S2: Installation of protective structure: The installation is carried out during the low tide period in the sea area. The culvert mouth protective structure 4 is fixedly installed at both ends of the water culvert 1, and the protective steel pipe 7 is fixedly installed on the side slope of the embankment structure 2.

[0062] S3: Connection of accessories of the inflatable airbag structure and leakage inspection: one end of the inflatable hose 6 is connected to the inflatable airbag structure 3, and the other end is connected to the pressure gauge 61, the air stop valve 63 and the gas pressure reducing valve 64. The inflatable airbag structure 3 is inflated through the inflating device 8 to make the inflatable airbag structure 3 reach the maximum working pressure, the air stop valve 63 is closed, and soapy water is evenly applied to the surface of the inflatable airbag structure 3 and the connection of the components to observe whether there is leakage. If there is no leakage, first remove the pressure gauge 61, the air stop valve 63 and the gas pressure reducing valve 64. The traction fixing structure 5 is connected to both ends of the inflatable airbag structure 3 to ensure that the length of the traction rope 51 meets the requirements.

[0063] S4: The inflatable airbag structure 3 enters the water culvert 1: During the low tide period in the sea area, underwater operations are carried out, and the culvert mouth protection structure 4 is kept open. The inflatable airbag structure 3 and the connecting piece 62 are placed into the water culvert 1, and the traction fixing structure 5 at both ends of the inflatable airbag structure 3 are connected to the culvert mouth protection structure 4. The inflation hose 6 is passed through the protection steel pipe 7, and the pressure gauge 61, the air stop valve 63, the gas pressure reducing valve 64 and the inflation equipment 8 are connected, and the culvert mouth protection structure 4 is closed.

[0064] S5: Water culvert sealing process: ensure that the stop valve 63 is open, start the inflation device 8 and maintain positive pressure until the maximum working pressure is reached in the inflatable airbag 31. The pressure in the inflatable airbag 31 can be maintained in the following two ways: one is to close the stop valve 63 and pay attention to the pressure gauge 61. When the pressure in the inflatable airbag 31 drops to the lower limit of the working pressure, open the stop valve 63 and replenish air to the maximum working pressure through the inflation device 8; the other is to keep the stop valve 63 open, the inflation device 8 continues to inflate, and the pressure in the inflatable airbag 31 is maintained within the working pressure range through the gas pressure reducing valve 64.

[0065] S6: Water culvert connection process: ensure that the air stop valve 63 is open, start the inflation device 8 and maintain negative pressure until the gas in the inflatable airbag 31 is completely discharged to a negative pressure state, and close the air stop valve 63 to maintain the small volume state of the inflatable airbag 31 under negative pressure.

[0066] S7: Replacement of damaged accessories: During low tide in the sea area, underwater operations are carried out to open the culvert mouth protection structure 4 at both ends of the culvert 1, cancel the connection between the traction fixing structure 5 and the culvert mouth protection structure 4, remove the accessories from the culvert, replace the damaged accessories and reinstall them into the culvert 1, and close the culvert mouth protection structure 4.

[0067] The above-mentioned related explanations and descriptions of the embodiments are for the convenience of those skilled in the art to understand and apply the present invention. It is obvious that those familiar with the art can easily make various modifications to these contents and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above-mentioned related explanations and descriptions of the embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. An airbag plugging structure for a tidal zone water culvert, comprising a dike structure and a water culvert arranged in the dike structure, characterized in that: It also includes an inflatable airbag structure, an inflating device, a culvert opening protection structure, and a traction fixing structure; The inflatable airbag structure is arranged in the water culvert, and the inflatable airbag structure includes an inflatable airbag, and a first plug and a second plug respectively fixedly arranged at both ends of the inflatable airbag; wherein the second plug is provided with an inflatable hose, and the inflatable hose is used to connect the inflatable device; A pull ring is fixedly provided on the first plug and the second plug, the pull ring is connected to one end of the traction fixing structure, and the other end of the traction fixing structure is connected to the culvert opening protection structure, and is used to fix the inflatable airbag in the water culvert by traction; The culvert opening protection structure is arranged at both ends of the water-passing culvert and is used to intercept garbage and marine organisms in the water from entering the water-passing culvert.

2. The airbag plugging structure for the tidal area water culvert according to claim 1 is characterized in that: A protective steel pipe is fixedly installed on the side slope of the embankment structure, wherein one end of the inflation hose is connected to the second plug on the inflation airbag, and the other end passes through the protective steel pipe and is connected to the inflation device.

3. The airbag plugging structure for the tidal area water culvert according to claim 1 is characterized in that: The second plug is provided with an air inlet, one end of which is connected to the inflatable airbag, and the other end of which is also connected to the inflatable hose.

4. The airbag plugging structure for the tidal area water culvert according to claim 1 is characterized in that: The inflation hose is provided with a pressure gauge, a gas stop valve and a gas pressure reducing valve at one end close to the inflation device; Among them, the pressure gauge is used to monitor the pressure inside the inflatable airbag structure in real time; the air stop valve is used to open and close the connection between the inflatable airbag structure and the outside world to maintain the pressure inside the inflatable airbag structure; the gas pressure reducing valve is used to control the pressure inside the inflatable airbag structure to be lower than the maximum working pressure to ensure inflation safety.

5. The airbag plugging structure for the tidal area water culvert according to claim 1 is characterized in that: The traction fixing structure is composed of a traction rope and hanging rings arranged at both ends of the traction rope; the hanging rings are used to connect the pull ring; and the two ends of the traction rope are respectively connected to the inflatable airbag and the culvert opening protection structure.

6. The airbag plugging structure for the tidal area water culvert according to claim 5 is characterized in that: The length of the traction rope should be the length from the end of the inflatable airbag structure to the adjacent side pipe opening of the water culvert + the surplus length.

7. The airbag plugging structure for the tidal area water culvert according to claim 6 is characterized in that: The "surplus length" is 1-2 times the diameter of the water culvert.

8. The airbag plugging structure for the tidal area water culvert according to claim 1 is characterized in that: The culvert mouth protection structure consists of a porous grating plate, a connecting ring, a connecting plate and a fixed structure; wherein the connecting ring is fixedly arranged at the lower end of the porous grating plate; one end of the connecting plate is fixedly connected to the top of the porous grating plate, and the other end is connected to the fixed structure through a rotating shaft; wherein the fixed structure is fixedly connected to the pipe mouth of the water culvert.

9. The airbag plugging structure for the tidal area water culvert according to claim 1, characterized in that: The connecting ring is connected to one end of the hanging ring on the traction fixing structure, and the porous grating plate is rotated around the rotating shaft on the fixing structure by pulling the other end of the traction fixing structure, so as to realize the opening or closing of the water culvert pipe opening by the culvert opening protection structure.

10. A method for implementing airbag plugging of a tidal area water culvert, characterized in that: The method is based on the airbag plugging structure for the tidal area water culvert according to claim 1, and the method comprises the following steps: S1: Preparation before plugging: Determine the specifications of the inflatable airbag according to the inner diameter of the water culvert and the maximum tidal range of the sea area, check the air tightness of the inflatable airbag, clean up the garbage, attached marine organisms and protrusions on the inner wall of the water culvert, and ensure that the inner wall of the culvert is clean; S2: Installation of protective structure: Installation is carried out during the low tide period in the sea area, and culvert opening protective structures are installed at both ends of the culvert, and the culvert opening protective structures are kept open, and protective steel pipes are installed on the side of the embankment; S3: Inflatable airbag accessories connection: The two ends of the inflatable airbag are connected to the traction fixing structure, the inflatable hose is inserted into the protective steel pipe, one end of the inflatable hose is connected to the air inlet of the inflatable airbag, and the other end is connected to the pressure gauge, the air stop valve and the gas pressure reducing valve, and connected to the inflation equipment; S4: Inflatable airbag into the water culvert: During the low tide period in the sea area, put the connected inflatable airbag and its accessories into the designed position in the water culvert, connect the traction fixing structures at both ends of the inflatable airbag to the culvert opening protection structure, and close the culvert opening protection structure; S5: Water culvert plugging process: Keep the air stop valve open, turn on the inflation device and provide positive pressure until the pressure in the airbag reaches the working pressure. The pressure in the airbag can be maintained in the following two ways: one is to close the air stop valve to maintain the pressure in the inflated airbag, and pay attention to the pressure gauge. When the pressure in the airbag drops to the lower limit of the working pressure, open the air stop valve and add air through the inflation device; the other is to keep the air stop valve open, the inflation device continues to inflate, and the pressure in the airbag is maintained within the working pressure range through the gas pressure reducing valve; S6: Water culvert connection process: keep the air stop valve open, turn on the inflation device and provide negative pressure until the gas in the airbag is completely discharged to a negative pressure state, close the air stop valve, and maintain the small volume state of the inflated airbag under negative pressure; S7: Replacement of damaged accessories: During low tide in the sea area, open the culvert mouth protection structure at both ends of the culvert, cancel the connection between the airbag fixing structure and the culvert mouth protection structure, remove the inflatable airbag and accessories from the culvert, replace the damaged accessories and reinstall them into the culvert, and close the culvert mouth protection structure.

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