Plugging device

Abstract

The utility model provides a plugging device which is characterized by comprising an air bag assembly, a heat insulation layer assembly and a liquid seal assembly. The air bag assembly comprises an air bag and an air pipe, one end of the air pipe communicates with the air bag, and the other end of the air pipe communicates with an external air source outside the container connecting pipe. The heat insulation layer assembly is arranged between the air bag and a to-be-repaired defect of the container connecting pipe; the output end of the liquid sealing assembly extends into the container connecting pipe, a port of the output end of the liquid sealing assembly is located between the heat insulation layer assembly and the defect to be repaired, a liquid sealing layer is formed between the air bag and the defect to be repaired, and the input end of the liquid sealing assembly is located outside the container connecting pipe; the utility model solves the problems that the production and use of the equipment are influenced and the normal production flow is delayed because the whole container equipment needs to be shut down for a long time during defect repair.

Description

Technical Field

[0001] The utility model relates to the field of container repair, in particular to a blocking device. Background Art

[0002] For flammable, explosive, and volatile hazardous media such as oil and gas, sealed containers are usually used for storage and transportation. If there is a defect in the container and a leakage problem occurs, the defect needs to be hot-repaired immediately.

[0003] In the prior art, when performing thermal repair of defects, the following steps are performed: isolating the equipment; depressurizing the container to normal pressure; replacing the hazardous medium with an inert gas; cleaning the container with chemical reagents; and performing a heating repair operation.

[0004] However, the above process requires the entire container equipment to be shut down for a long time, affecting the production and use of the equipment and delaying the normal production process. Utility Model Content

[0005] The utility model provides a blocking device to solve the problem in the related art that the entire container equipment needs to be shut down for a long time when repairing defects, which affects the production and use of the equipment and delays the normal production process.

[0006] In order to solve the problems in the prior art, the present invention is achieved as follows:

[0007] The utility model provides a sealing device, which includes: an airbag assembly, an insulation layer assembly and a liquid seal assembly; the airbag assembly includes an airbag and an air tube, one end of the air tube is connected to the airbag, and the other end of the air tube is connected to an external air source outside the container pipe; the insulation layer assembly is arranged between the airbag and the defect to be repaired of the container pipe; the output end of the liquid seal assembly extends into the interior of the container pipe, and the port of the output end of the liquid seal assembly is located between the insulation layer assembly and the defect to be repaired, so that a liquid seal layer is formed between the airbag and the defect to be repaired, and the input end of the liquid seal assembly is located outside the container pipe.

[0008] Optionally, the airbag is an ellipsoid, and the connection position between the trachea and the airbag is at the vertex of the ellipsoid;

[0009] The circumferential diameter of the airbag after inflation and deformation is greater than the diameter of the container pipe;

[0010] An inflation valve core is provided at a position where the air pipe is in communication with the external air source;

[0011] The air pipe is a rigid and lengthened air pipe, so that the port at one end of the air pipe communicating with the external air source is always located outside the container connecting pipe.

[0012] Optionally, the thermal insulation layer assembly includes fireproof putty, which is laid around the air pipe and between the airbag and the defect to be repaired.

[0013] Optionally, the thermal insulation layer assembly further includes a baffle, which is arranged at a position where the air pipe connects to the airbag and is parallel to the cross-section of the container pipe, and is used to support the fireproof putty.

[0014] Optionally, the liquid seal assembly includes a siphon and a liquid tank;

[0015] The liquid tank is located outside the container pipe, one end of the siphon tube extends into the container pipe, forming the output end of the liquid seal assembly, and the other end of the siphon tube is connected to the liquid in the liquid tank, forming the input end of the liquid seal assembly;

[0016] The port height of the output end is lower than the port height of the input end.

[0017] Optionally, the siphon is fixed to the trachea by a binding band.

[0018] Optionally, a first sensor is provided on the air pipe, and the first sensor is used to monitor the concentration of the hazardous medium in the container connecting pipe.

[0019] Optionally, an identification structure is provided on the air pipe. When the identification structure is flush with the end face of the connection end of the container connecting pipe, the end of the airbag that is deformed by inflation and away from the air pipe is exactly at the intersection of the container connecting pipe and the corresponding main container.

[0020] Optionally, a second sensor is provided on the air pipe, and the second sensor is provided at a position of the air pipe close to the thermal insulation layer assembly, and the second sensor is used to monitor the height of the liquid level of the liquid sealing layer.

[0021] In the sealing device provided by the present invention, after the airbag passes over the defect to be repaired, it is inflated and deformed by introducing gas through the air tube, causing the outer wall of the airbag to press against the inner wall of the container nozzle, completing the primary sealing of the container nozzle. The thermal insulation layer assembly is used to isolate the heat generated by the defect repair and prevent damage to the airbag. The liquid seal assembly injects liquid into the container nozzle through the output end, forming a liquid seal layer between the airbag and the defect to be repaired, completing the secondary sealing of the container nozzle. The sealing device provided by the present invention can seal and isolate the container nozzle without shutting down the entire container equipment, facilitating repair work directly on the container nozzle, and realizing online repair of defects in hazardous media containers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 This is a schematic diagram of a blocking device according to an embodiment of the present utility model.

[0024] Among them, 10-airbag assembly, 20-insulation layer assembly, 30-liquid seal assembly, 40-hazardous medium container, 11-airbag, 12-trachea, 121-inflatable valve core, 122-first sensor, 123-identification structure, 124-second sensor, 125-binding belt, 21-fireproof putty, 22-baffle, 31-siphon, 311-output port, 312-input port, 32-liquid tank, 33-liquid seal layer, 41-container pipe, 411-defect to be repaired, 42-main container, 43-connecting end. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Although the drawings show exemplary embodiments of the present invention, it should be understood that the present invention can also be implemented in various forms and should not be limited by the embodiments described here. Instead, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0026] Reference Figure 1 , showing a schematic diagram of a blocking device provided by the utility model, Figure 1 In the figure, the sealing device includes: an airbag assembly 10, an insulation layer assembly 20 and a liquid seal assembly 30; the airbag assembly 10 includes an airbag 11 and an air tube 12, one end of the air tube 12 is connected to the airbag 11, and the other end of the air tube 12 is connected to the external air source outside the container pipe 41; the insulation layer assembly 20 is arranged between the airbag 11 and the defect 411 to be repaired of the container pipe 41; the output end of the liquid seal assembly 30 extends into the interior of the container pipe 41, and the port 311 of the output end of the liquid seal assembly 30 is located between the insulation layer assembly 20 and the defect 411 to be repaired, so that a liquid seal layer 33 is formed between the airbag 11 and the defect 411 to be repaired, and the input end of the liquid seal assembly 30 is located outside the container pipe 41.

[0027] Reference Figure 1The hazardous medium container 40 is divided into a main container 42 and a container pipe 41. The axial direction of the container pipe 41 is vertically upward. The container pipe 41 is connected to the subsequent container pipeline through the connecting end 43. The container pipe 41 and the connecting end 43 are connected as a whole by welding. In the embodiment of the present utility model, the axial direction of the container pipe 41 can also be slightly inclined relative to the vertical direction. The connecting end 43 can be a structure with a neck butt welding flange for connecting between containers; a defect 411 to be repaired appears at the connecting weld of the connecting end 43 and the container pipe 41. If it is not handled in time, there will be a risk of leakage of hazardous media. Risk; In the related art, if a hot repair process for the defect 411 to be repaired is required, the entire container equipment will be shut down, the hazardous medium container 40 will be isolated, and the pressure inside the hazardous medium container 40 will be reduced to normal pressure. Then, the hazardous medium will be replaced with an inert gas to achieve the purpose of expelling the hazardous medium from the hazardous medium container 40. In order to prevent the hazardous medium from remaining on the inner wall of the container and posing a risk to the hot repair operation, the inner wall of the hazardous medium container 40 will be cleaned with a safe organic solvent or other chemical reagent. After the cleaning is completed, the hot repair of the defect 411 to be repaired will be carried out. The entire hazardous medium container 40 has a large volume and inner wall area, and it takes a long time to perform gas replacement and container cleaning. In addition, the entire container equipment needs to be shut down, which will cause the hazardous medium container 40 to be shut down for a long time and cannot be put into use, affecting the production process. To this end, the utility model proposes a blocking device. Before the defect 411 to be repaired, the blocking device proposed by the utility model is deployed to achieve complete blocking of the container pipe 41, achieve isolation of the defect 411 to be repaired, and thus achieve online repair of the hazardous medium container 40.

[0028] The plugging device provided by the present invention is composed of a necked butt-welded flange 43 extending into a container pipe 41. According to the order of insertion, the plugging device is divided into an airbag assembly 10, a heat insulation layer assembly 20 and a liquid seal assembly 30.

[0029] Reference Figure 1The airbag assembly 10 first extends into the container pipe 41. In the airbag assembly 10, the first part that extends into the container pipe 41 is the airbag 11. The airbag 11 is connected to the external air source outside the container pipe 41 through the air pipe 12 connected thereto. The external air source injects gas into the airbag 11 through the air pipe 12, causing the airbag 11 to inflate and expand and deform. After the airbag 11 passes the position of the defect 411 to be repaired, the airbag 11 can be inflated to cause it to deform due to inflation. During the deformation process of the airbag 11, its outer wall will gradually approach the inner wall of the container pipe 41 until it is finally pressed tightly against the inner wall of the container pipe 41. At this time, there is no gap between the inner wall of the container pipe 41 and the airbag 11, and the dangerous medium in the main container 42 is blocked by the airbag 11 and cannot enter the container pipe 41 to reach the position of the defect 411 to be repaired. As a result, the blocking device blocks the container pipe 41 once, thereby achieving preliminary isolation of the defect 411 to be repaired.

[0030] Reference Figure 1 The thermal insulation layer assembly 20 is placed into the container pipe 41 after the airbag assembly 10, and the setting position of the thermal insulation layer assembly 20 is between the airbag 11 and the defect 411 to be repaired; the thermal insulation layer assembly 20 is used to isolate the heat generated by the hot repair welding operation transmitted from the position of the defect 411 to be repaired, to prevent the heat generated by the hot repair from damaging the airbag 11, causing the airbag assembly 10 to fail, and affecting the sealing effect of the sealing device.

[0031] Reference Figure 1 The sealing device also includes a liquid seal assembly 30. The port 311 at the output end of the liquid seal assembly 30 is located between the thermal insulation layer assembly 20 and the defect to be repaired 411. The input end of the liquid seal assembly 30 is located outside the container pipe 41. Liquid flows from the input end to the output end, and the liquid seal assembly 30 transports liquid from outside the container pipe 41 to inside the container pipe 41. After the liquid is transported into the container pipe 41, a liquid seal layer 33 with a certain liquid level is formed between the airbag 10 (which has achieved the primary seal) and the defect to be repaired 411. After the liquid seal layer 33 is formed, it not only prevents the passage of dangerous media, but also performs a secondary seal on the container pipe 41, enhancing the sealing effect and further isolating the defect to be repaired 411. It also isolates the heat generated by the hot repair welding operation transmitted from the location of the defect to be repaired 411, achieving a similar effect as the thermal insulation layer assembly 20 and enhancing the safety of the entire sealing device. In an embodiment of the present invention, the liquid forming the liquid sealing layer 33 does not chemically react with the hazardous medium. Considering the cost of use and the difficulty of obtaining it, water can be used to form the liquid sealing layer 33. The height of the liquid level of the liquid sealing layer 33 can be set to 20 cm without overflowing the defect 411 to be repaired, that is, the distance between the liquid level of the liquid sealing layer 33 and the connection position between the airbag 11 and the trachea 12 is 20 cm.

[0032] After the sealing device composed of the airbag assembly 10, the insulation layer assembly 20 and the liquid seal assembly 30 is deployed, it is sealed in the container pipe 41, isolating the defect 411 to be repaired from the hazardous medium container 40, forming an independent and safe working environment, so that the defect hot repair operation can be carried out independently of the main container 42, without affecting the normal operation of the main container 42, and there is no need to shut down the entire container equipment.

[0033] In the sealing device provided by the present invention, after the airbag passes over the defect to be repaired, gas is introduced through the air pipe, causing it to inflate and deform, pressing the outer wall of the airbag tightly against the inner wall of the container pipe, completing the primary sealing of the container pipe. The thermal insulation layer assembly is used to isolate the heat generated by the defect repair and prevent damage to the airbag. The liquid seal assembly injects liquid into the container pipe through the output end, forming a liquid seal layer between the airbag and the defect to be repaired, completing the secondary sealing of the container pipe. The sealing device provided by the present invention can seal and isolate the container pipe without shutting down the entire container equipment, facilitating repair work directly on the container pipe without affecting the use of the main container, thus achieving online repair of defects in hazardous medium containers.

[0034] Optional, see Figure 1 The airbag 11 is an ellipsoid, and the connection position between the air tube 12 and the airbag 11 is at the vertex of the ellipsoid; the circumferential diameter of the airbag 11 after inflation and deformation is greater than the diameter of the container pipe 41; an inflation valve core 121 is set at the position where the air tube 12 is connected to the external air source; the air tube 12 is a rigid extended air tube, so that the port at one end of the air tube connected to the external air source is always located outside the container pipe.

[0035] The airbag 11 is one of the core components for achieving sealing. The airbag 11 is set as an ellipsoid, and the trachea 12 is connected to the airbag 11 at the apex of the ellipsoid, so that the airbag 11 can change uniformly along the circumference when deformed, including uniform expansion when inflated and uniform contraction when deflated, which facilitates the deployment and evacuation of the airbag assembly 10; the circumferential diameter of the airbag 11 after inflation deformation is larger than the diameter of the container pipe 41, so that the airbag 11 can be pressed tightly against the inner wall of the inflatable pipe 41 to achieve a sealing effect; the trachea 12 is provided with an inflation valve core 121 to prevent air leakage during the inflation of the airbag 11; the trachea 12 is made of rigid material, which is convenient for manual or mechanical control of the insertion and extension of the airbag assembly 10 in the container pipe 41, and the trachea 12 is lengthened so that in the process of the airbag assembly 10 extending into the container pipe 41, the position of the connection port of the trachea 12 with the external air source is always located outside the container pipe 41. Through the above-mentioned arrangement, the airbag 11 can be pushed into the deployment position in the container pipe 41 through the air tube 12 to be inflated and deformed when it is in an uninflated state before the defect 411 to be repaired is repaired, thereby completing the deployment of the airbag assembly 10 and achieving a one-time blocking effect; after the defect 411 to be repaired is repaired, the airbag 11 is deflated and shrunk, and no longer contacts and fits with the inner wall of the container pipe 41, and can be directly lifted out of the container pipe 41 together with the airbag 11 by the air tube 12, thereby achieving the evacuation of the airbag assembly 10.

[0036] Optional, see Figure 1 The thermal insulation layer assembly 20 includes a fireproof putty 21, which is laid around the air pipe 12 and between the airbag 11 and the defect 411 to be repaired.

[0037] In the embodiment of the sealing device provided by the present invention, the part of the thermal insulation layer assembly 20 that plays the role of insulation is the fireproof putty 21. The fireproof putty 21 has strong viscosity and can stick to the airbag 11 to isolate the heat of the hot repair welding operation; the fireproof putty 21 is laid around the air pipe 12 between the airbag 11 and the defect to be repaired 411, so that the thermal insulation layer assembly can play a role of thermal insulation protection for the airbag 11 without affecting the inflation and deflation process of the airbag assembly 10. It should be noted that in the sealing device provided by the present invention, the main function of the thermal insulation layer assembly is insulation, but it can also play a sealing role, that is, for the fireproof putty, it can be laid to the completely sealed container pipe 41; in Figure 1 In the solution of the embodiment of the present invention shown, the fireproof putty is laid to the completely sealed container pipe 41; as for the laying thickness of the fireproof putty, considering the cost of use and the difficulty of setting, 10 cm can be selected.

[0038] Optional, see Figure 1The insulation layer assembly 20 further includes a baffle 22 , which is disposed at a position where the air pipe 12 communicates with the airbag 11 and is parallel to the cross section of the container pipe 41 . The baffle is used to carry the fireproofing putty 21 .

[0039] Since the fireproof putty 21 has strong viscosity and the airbag 11 will deform, it will be difficult to remove and recycle the fireproof putty 21 after it sticks to the airbag 11. For this reason, a baffle 22 parallel to the cross-section of the container pipe 41 can be set at the connection position where the air pipe 12 connects to the airbag 11 to support the fireproof putty 21, that is, the fireproof putty does not stick directly to the airbag 11, but sticks to the baffle 22. When the fireproof putty 21 needs to be recovered, the fireproof putty 21 is easier to remove from the flat baffle.

[0040] Optional, see Figure 1 The liquid seal assembly 30 includes a siphon tube 31 and a liquid tank 32; the liquid tank 32 is located outside the container pipe 41, one end of the siphon tube 31 extends into the container pipe, forming the output end of the liquid seal assembly 30, and the other end of the siphon tube 31 is connected to the liquid in the liquid tank 32, forming the input end of the liquid seal assembly; the height of the port 311 at the output end is lower than the height of the port 312 at the input end.

[0041] During hot repair work, the heat generated by the welding operation will cause the liquid in the liquid sealing layer 33 to evaporate and dissipate, thereby lowering the liquid level of the liquid sealing layer 33. When the liquid level of the liquid sealing layer 33 is lower than the safe liquid level, the sealing and heat-insulating effects of the liquid sealing layer will no longer be guaranteed. To this end, the liquid sealing component utilizes the siphon principle to provide a siphon tube 31 and a liquid tank 32, with the port 311 at the output end being lower than the port 312 at the input end, so that the liquid pressure at the port at the input end is greater than the liquid pressure at the port at the output end, thereby pushing the liquid in the liquid tank 32 into the liquid sealing layer 33 through the siphon tube 31, maintaining the liquid level of the liquid sealing layer 33, and ensuring that the liquid level of the liquid sealing layer 33 always remains above the safe liquid level.

[0042] Optional, see Figure 1 The siphon tube 21 is fixed to the trachea 12 by a binding band 125 .

[0043] For cost considerations, the siphon tube 21 can be fixed to the trachea 12 by a binding belt 125 , thereby eliminating the need for an additional support structure for the siphon tube 21 and ensuring the normal siphoning effect of the liquid seal assembly 30 .

[0044] Optional, see Figure 1 A first sensor 122 is provided on the air pipe 12, and the first sensor 122 is used to monitor the concentration of the hazardous medium in the container pipe.

[0045] Before the hot repair operation, it is also necessary to determine that the concentration of hazardous media in the container pipe 41 will not affect the safety of the operation. To this end, multiple first sensors 122 can be set at intervals on the air pipe 122 to monitor the concentration of hazardous media at various locations in the container pipe 41. If the concentration exceeds the standard, a warning message will be issued to remind relevant personnel to stop the hot repair operation to avoid safety accidents.

[0046] Optional, see Figure 1 An identification structure 123 is provided on the air pipe 12. When the identification structure 123 is flush with the end face of the connecting end 43 of the container connecting pipe, the end of the airbag 11 that is deformed by inflation and away from the air pipe 12 is just at the intersection of the container connecting pipe 41 and the corresponding main container 42.

[0047] The identification structure 123 is used to identify the maximum length of the airbag assembly 10 extending into the trachea, that is, to identify the maximum isolation position of the sealing device. When the identification structure 123 is flush with the end face of the connecting end 43 of the container pipe, it indicates that the airbag assembly has reached the maximum length of extending into the trachea. If it continues to extend, the airbag 11 will exceed the intersection of the container pipe 41 and the corresponding main container 42, and the sealing effect of the airbag assembly 10 cannot be achieved; the airbag assembly 10 needs to be inflated and deformed in the container pipe 41 to achieve a one-time sealing of the container pipe 41. If the airbag assembly is too deep, so that the airbag 11 exceeds the intersection of the container pipe 41 and the corresponding main container 42, the outer wall of the airbag 11 cannot be pressed tightly against the inner wall of the container pipe 41 to achieve the sealing effect, and it will also affect the use of the main container 42.

[0048] Optional, see Figure 1 A second sensor 124 is provided on the air pipe 12 . The second sensor 124 is provided at a position of the air pipe close to the thermal insulation layer assembly 20 . The second sensor is used to monitor the height of the liquid level of the liquid sealing layer 33 .

[0049] In addition to the functions of sealing and heat insulation, the liquid sealing layer 33 can also cooperate with the second sensor 124 to indicate whether the sealing function of the airbag assembly 10 has failed. Specifically, a second sensor 124 is set on the air pipe 12 to monitor the height of the liquid level of the liquid sealing layer 33. When the fireproof putty 21 only plays a heat-insulating role, if the second sensor 124 detects that the height of the liquid level of the liquid sealing layer 33 drops rapidly in a short period of time, it means that the outer wall of the airbag 11 in the airbag assembly 10 is not completely pressed against the inner wall of the container pipe 41, and there is a gap between the two. At this time, the sealing function of the airbag assembly 10 has failed, the hot repair operation should be stopped, and the airbag assembly 10 in the sealing device should be checked.

[0050] In the sealing device provided by the present invention, the airbag in the form of an ellipsoid and the air tube arranged at the apex of the ellipsoid ensure uniform deformation of the airbag, and the rigid extended air tube facilitates the deployment and evacuation of the airbag assembly. The air tube is provided with an inflation valve core to avoid air leakage during the inflation process; the heat insulation layer assembly composed of fireproof putty and baffles is easy to recycle while ensuring the heat insulation effect; the liquid seal assembly is provided with a siphon tube to achieve the stability of the liquid level height of the liquid seal layer and ensure the safety of the sealing device; the setting of the first sensor ensures that the concentration of hazardous media in the container pipe does not exceed the safe range; the identification structure identifies the extreme isolation position of the sealing device to ensure that the sealing device will not fail due to moving too deep; the second sensor is provided to indicate whether the sealing effect of the airbag assembly has failed. Through the above-mentioned characteristic means, the sealing device provided by the present invention can be tested for safety and reliability on the premise of achieving the sealing and isolation effect, ensuring that the online repair of the hazardous medium container is carried out in a reliable and safe isolation environment.

[0051] The terms "first," "second," and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "first," "second," and the like generally distinguish objects of a class and do not limit the number of objects. For example, the first object may be one or more.

[0052] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral 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 will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A blocking device, characterized in that: The sealing device includes: an airbag assembly, an insulation layer assembly and a liquid seal assembly; the airbag assembly includes an airbag and an air tube, one end of the air tube is connected to the airbag, and the other end of the air tube is connected to an external air source outside the container pipe; the insulation layer assembly is arranged between the airbag and the defect to be repaired on the container pipe; the output end of the liquid seal assembly extends into the interior of the container pipe, and the port of the output end of the liquid seal assembly is located between the insulation layer assembly and the defect to be repaired, so that a liquid seal layer is formed between the airbag and the defect to be repaired, and the input end of the liquid seal assembly is located outside the container pipe.

2. The blocking device according to claim 1, characterized in that: The airbag is an ellipsoid, and the connection position between the trachea and the airbag is at the vertex of the ellipsoid; The circumferential diameter of the airbag after inflation and deformation is greater than the diameter of the container pipe; An inflation valve core is provided at a position where the air pipe is in communication with the external air source; The air pipe is a rigid and lengthened air pipe, so that the port at one end of the air pipe communicating with the external air source is always located outside the container connecting pipe.

3. The blocking device according to claim 1, characterized in that: The thermal insulation layer assembly includes fireproof putty, which is laid around the air pipe and between the airbag and the defect to be repaired.

4. The blocking device according to claim 3, characterized in that: The thermal insulation layer assembly further includes a baffle, which is arranged at a position where the air pipe is connected to the airbag and is parallel to the cross section of the container pipe, and is used to carry the fireproof putty.

5. The blocking device according to claim 1, wherein: The liquid seal assembly includes a siphon and a liquid tank; The liquid tank is located outside the container pipe, one end of the siphon tube extends into the inner tube of the container, forming the output end of the liquid seal assembly, and the other end of the siphon tube is connected to the liquid in the liquid tank, forming the input end of the liquid seal assembly; The port height of the output end is lower than the port height of the input end.

6. The blocking device according to claim 5, characterized in that: The siphon is fixed to the trachea by a binding band.

7. The blocking device according to claim 1, characterized in that: An identification structure is provided on the air pipe. When the identification structure is flush with the end face of the connection end of the container connecting pipe, the end of the airbag that is deformed by inflation and away from the air pipe is exactly at the intersection of the container connecting pipe and the corresponding main container.

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