Urban updated old pipeline plugging air bag

Abstract

The utility model belongs to the technical field of urban renewal pipeline engineering construction, and particularly relates to an urban renewal old pipeline plugging air bag which comprises an air bag body, an interlayer is arranged in the air bag body and divides the air bag body into an air bag front cabin and an air bag rear cabin, the air bag front cabin is connected with a barometer A, and the air bag rear cabin is connected with a barometer B. A pressure maintaining exhaust valve A is installed on the front end face of the air bag front cabin. A pressure-maintaining exhaust valve B is mounted on the rear end face of the airbag rear cabin; and the air compressor is respectively communicated with the airbag front cabin and the airbag rear cabin through an air channel pipeline C. According to the double-cabin air bag, safety measure redundancy is achieved, and when one air bag loses efficacy, the other air bag can still block a pipeline; fresh air outside the pipeline is conveyed to the old pipeline through the pressure maintaining exhaust valve A, and toxic and harmful gas in the old pipeline can be isolated and diluted; the pressure-maintaining exhaust valve B is used for conveying fresh air outside the pipeline to a new pipeline and providing fresh air required by breathing of construction workers.

Description

Technical Field

[0001] This utility model belongs to the field of construction technology for urban renewal pipeline engineering, and in particular relates to an airbag for sealing old pipelines in urban renewal. Background Technology

[0002] In existing urban renewal pipeline construction projects, before connecting old and new pipelines, the old pipelines may contain toxic or harmful gases. Therefore, it is necessary to temporarily seal the old pipelines before constructing the new pipelines. After the new pipelines are completed, the temporary seals on the old pipelines are removed, and then the new pipelines are connected to form an extension and continuity of the pipeline system. When the old pipelines are not sealed tightly, toxic or harmful gases may enter the work area of ​​the new pipelines, leading to poisoning of construction workers and causing safety accidents. Therefore, there is an urgent need for an urban renewal pipeline sealing device to overcome the above problems. Summary of the Invention

[0003] The problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an airbag for sealing old pipelines in urban renewal.

[0004] This invention is achieved through the following technical solution:

[0005] An airbag for sealing old pipelines in urban renewal includes an airbag with a partition dividing it into a front chamber and a rear chamber. The front chamber is connected to a pressure gauge A via an air pipe A, and the rear chamber is connected to a pressure gauge B via an air pipe B. Several pressure-holding and venting valves A are installed on the front end of the front chamber, and several pressure-holding and venting valves B are installed on the rear end of the rear chamber. The airbag also includes an air compressor connected to both the front and rear chambers via an air pipe C, which is equipped with valves.

[0006] Preferably, the partition is located in the middle of the airbag.

[0007] Preferably, the pressure-holding and venting valve A is evenly distributed around the front end face of the airbag's front compartment, and the pressure-holding and venting valve B is evenly distributed around the rear end face of the airbag's rear compartment.

[0008] Preferably, the airbag is a rubber airbag.

[0009] Compared with existing technologies, the beneficial effects of this utility model are as follows: A pressure gauge is installed to monitor the working status of the airbag in real time, ensuring that the air pressure inside the airbag is not lower than the design value, guaranteeing a tight seal. If leakage occurs, it can be detected in time and construction personnel can be evacuated. The dual-chamber airbag provides redundancy in safety measures; if one airbag fails, the other airbag can still seal the pipeline, preventing any incomplete sealing. A pressure-maintaining and exhaust valve A is installed in the direction of the old pipeline to allow fresh air to be supplied to the old pipeline. This fresh air isolates and dilutes toxic and harmful gases in the old pipeline, preventing toxic and harmful gases from seeping into the new pipeline if the old pipeline is not tightly sealed. A pressure-maintaining and exhaust valve B is installed in the direction of the new pipeline to allow fresh air to be supplied to the new pipeline, providing the fresh air needed for construction personnel to breathe. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this embodiment.

[0011] In the diagram, 1 is the airbag, 2 is the partition, 3 is the front airbag compartment, 4 is the rear airbag compartment, 5 is the air pipe A, 6 is the pressure gauge A, 7 is the air pipe B, 8 is the pressure gauge B, 9 is the pressure holding and exhaust valve A, 10 is the pressure holding and exhaust valve B, 11 is the air compressor, 12 is the air pipe C, and 13 is the valve. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0013] This embodiment includes an airbag 1, which has a partition 2 that divides it into two independent compartments: a front airbag compartment 3 and a rear airbag compartment 4. In this embodiment, the airbag 1 is preferably a rubber airbag, and the partition 2 is located in the middle of the airbag 1. The front airbag compartment 3 is connected to a pressure gauge A6 via an air passage pipe A5, and the pressure gauge A6 is used to detect the air pressure inside the front airbag compartment 3. The rear airbag compartment 4 is connected to a pressure gauge B8 via an air passage pipe B7, and the pressure gauge B8 is used to detect the air pressure inside the rear airbag compartment 4.

[0014] Several pressure-holding and exhaust valves A9 are installed on the front face of the airbag front compartment 3. Preferably, the pressure-holding and exhaust valves A9 are evenly distributed around the front face of the airbag front compartment 3. When the air pressure inside the airbag front compartment 3 exceeds a set value, the pressure-holding and exhaust valves A9 will open and exhaust air from the front of the airbag front compartment 3, that is, vent the air inside the airbag front compartment 3 into the old pipeline. Several pressure-holding and exhaust valves B10 are installed on the rear face of the airbag rear compartment 4. Preferably, the pressure-holding and exhaust valves B10 are evenly distributed around the rear face of the airbag rear compartment 4. When the air pressure inside the airbag rear compartment 4 exceeds a set value, the pressure-holding and exhaust valves B10 will open and exhaust air from the rear of the airbag rear compartment 4, that is, vent the air inside the airbag rear compartment 4 into the construction work space. The pressure-holding and exhaust valves are common components, and their structure and principle will not be described in detail here.

[0015] This embodiment also includes an air compressor 11, which is connected to the front chamber 3 and the rear chamber 4 of the airbag via an air passage pipe C12. After entering the rear chamber 4, the air passage pipe C12 splits into two paths: one connecting to the rear chamber 4 and the other to the front chamber 3. The air compressor 11 delivers fresh outside air to both the front and rear chambers of the airbag, causing the airbag 1 to inflate and seal the old pipe. A valve 13 is provided on the air passage pipe C12 to prevent backflow of gas inside the airbag 1.

[0016] In urban renewal pipeline projects, during the renovation or extension of old pipelines and the integration of old and new pipelines, the old pipelines may contain toxic or harmful gases. During construction, the old pipelines need to be temporarily sealed to prevent poisoning of construction workers or the entry of foreign objects into the new pipeline. After the new pipeline is completed, the seal is removed to connect the old and new pipelines, completing the urban renewal project. The airbag 1 of this invention is applied in the above process: At the end of the old pipeline near the new pipeline, approximately 2 meters of the old pipeline is first cleaned. Then, the airbag 1 is placed inside the cleaned old pipeline, with the front chamber 3 of the airbag located on one side facing the old pipeline and the rear chamber 4 located on one side facing the new pipeline. (See attached...) Figure 1The following components are installed sequentially: air pipe A5, pressure gauge A6, air pipe B7, pressure gauge B8, air pipe C12, valve 13, and air compressor 11. Pressure gauges A6 and B8, valve 13, and air compressor 11 are installed on the ground outside the pipeline construction area. After system installation, air compressor 11 is started, filling the front chamber 3 and rear chamber 4 of the airbag with fresh air. The air pressure in the front chamber 3 and rear chamber 4 is displayed by pressure gauges A6 and B8, respectively. Once the inflation reaches the sealing pressure, the sealing of the old pipeline is completed. Fresh air continues to be supplied. When the pressure exceeds the pressure threshold of the pressure-holding and exhaust valve A9 in the front chamber 3, the air in the front chamber 3 is discharged towards the old pipeline through the pressure-holding and exhaust valve A9. The discharged air dilutes the gas in the old pipeline, forming a redundant safety protection measure in case of airbag 1 failure. Air in the rear chamber 4 of the airbag is discharged towards the new pipeline through the pressure-holding and exhaust valve B10, forming a fresh air circulation at the construction work site. This provides fresh air for subsequent construction personnel to enter and carry out construction work until the new pipeline is completed. During this period, the air pressure in the front chamber 3 and rear chamber 4 of the airbag is monitored. If it is lower than the working pressure, the air compressor 11 is started to input air. If the working pressure is reached, valve 13 can be closed to prevent air backflow from the airbag 1. When it is necessary to connect the old and new pipelines, fresh air is continuously input for more than 1 hour to ensure that there are no toxic or harmful gases around the old pipeline and that the area near the new pipeline interface is full of fresh air. Then, the air compressor 11 is removed, valve 13 is opened, and the air in the front chamber 3 and rear chamber 4 of the airbag is discharged. Then, the pressure gauge A6, pressure gauge B8, valve 13, air pipe A5, air pipe B7, air pipe C12, and airbag 1 are removed in sequence to connect the old and new pipelines and complete the project.

[0017] It should be noted that this embodiment adopts a dual-compartment airbag design with a front compartment 3 and a rear compartment 4. If either airbag compartment leaks and fails, the other airbag compartment can still seal the old pipeline, achieving redundant safety measures. When both airbags 1 leak and fail, and are insufficient to seal the old pipeline, the fresh air input from the old pipeline direction can isolate and dilute any potentially toxic or harmful gases, thus protecting the construction personnel working in the new pipeline area. The circulating fresh air input from the new pipeline direction can meet the breathing needs of the construction personnel during emergency evacuation. The barometers A6 and B8 installed on the ground can monitor the working status of airbags 1 in real time. If airbag 1 fails, the monitoring personnel can be notified immediately and direct the construction personnel in the pipeline to evacuate immediately, thereby forming a comprehensive safety protection measure for the construction personnel.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; those skilled in the art should understand that modifications can still be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An airbag for sealing old pipelines in urban renewal, characterized in that: The system includes an airbag (1), which has a partition (2) inside to divide the airbag (1) into a front airbag compartment (3) and a rear airbag compartment (4). The front airbag compartment (3) is connected to a pressure gauge A (6) through an air pipe A (5), and the rear airbag compartment (4) is connected to a pressure gauge B (8) through an air pipe B (7). Several pressure-holding and exhaust valves A (9) are installed on the front end of the front airbag compartment (3), and several pressure-holding and exhaust valves B (10) are installed on the rear end of the rear airbag compartment (4). The system also includes an air compressor (11), which is connected to the front airbag compartment (3) and the rear airbag compartment (4) through an air pipe C (12). A valve (13) is provided on the air pipe C (12).

2. The urban renewal old pipeline sealing airbag according to claim 1, characterized in that: The partition (2) is located in the middle of the airbag (1).

3. The urban renewal old pipeline sealing airbag according to claim 1, characterized in that: The pressure-holding and exhaust valve A (9) is evenly distributed around the front end face of the airbag front chamber (3), and the pressure-holding and exhaust valve B (10) is evenly distributed around the rear end face of the airbag rear chamber (4).

4. The urban renewal old pipeline sealing airbag according to claim 1, characterized in that: The airbag (1) is a rubber airbag.

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