Air bag for functional test of municipal sewer

Abstract

The application relates to the technical field of sewer functional test construction, in particular to an air bag for municipal sewer functional test, which comprises a main air bag, one end of the main air bag is connected with an auxiliary air bag, the main air bag and the auxiliary air bag are both cylindrical and are in communication, the outer diameter of the auxiliary air bag is larger than that of the main air bag, an air bag inflation pipe and a pipeline inflation pipe are arranged on the end face of the main air bag, one end of the air bag inflation pipe is located in the main air bag, one end of the pipeline inflation pipe extends to the outside of the auxiliary air bag, one end of the air bag inflation pipe and the pipeline inflation pipe extending out of the main air bag is connected with an air inlet pipe, a switching valve is arranged on the air inlet pipe, and the air tightness of the contact surface between the air bag and the inner wall of the pipeline is improved.

Description

Technical Field

[0001] This application relates to the field of construction technology for functional testing of drainage pipelines, and in particular to an airbag for functional testing of municipal drainage pipelines. Background Technology

[0002] Functional testing of municipal drainage projects is one of the important measures to ensure the normal operation of drainage pipeline systems. The main functional tests for municipal drainage projects are water tightness tests and air tightness tests. When using a water tightness test, the pipe opening needs to be sealed, usually using shale bricks and cement mortar to prevent water leakage. When using an air tightness test, an inflatable airbag is typically used to seal the pipe opening to prevent air leakage.

[0003] Traditional airbag sealing methods involve inflating the airbag. When the gas pressure inside the airbag reaches the specified requirements, the airbag fills the entire pipe cross-section. The friction between the airbag wall and the pipe is used to seal the leak, thus achieving the goal of preventing water seepage in the target pipe section.

[0004] The existing technical solutions mentioned above have the following drawbacks: traditional airbags are easily displaced by the pressure of the medium, which can easily cause air leakage at the contact surface between the airbag and the inner wall of the pipe, resulting in reduced accuracy of the test results. Utility Model Content

[0005] This application provides an airbag for functional testing of municipal drainage pipelines to improve the airtightness of the contact surface between the airbag and the inner wall of the pipeline.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0007] An airbag for functional testing of municipal drainage pipelines includes a main airbag and an auxiliary airbag connected to one end of the main airbag. Both the main airbag and the auxiliary airbag are cylindrical and connected to each other. The outer diameter of the auxiliary airbag is larger than that of the main airbag. An airbag inflation tube and a pipeline inflation tube are inserted through the end face of the main airbag. One end of the airbag inflation tube is located inside the main airbag, and one end of the pipeline inflation tube extends to the outside of the auxiliary airbag. The ends of the airbag inflation tube and the pipeline inflation tube extending out of the main airbag are connected to an air inlet pipe, and a switching valve is installed on the air inlet pipe.

[0008] By adopting the above technical solution, the outer diameter of the auxiliary airbag is larger than that of the main airbag, which can reduce the pressure on the main airbag from inside the pipeline, reduce the deformation of the main airbag caused by the pressure inside the pipeline, and ensure the airtightness of the contact surface between the main airbag and the inner wall of the pipeline. At the same time, the auxiliary airbag can increase the contact area between the airbag and the inner wall of the pipeline, improve the airtightness of the contact surface between the airbag and the inner wall of the pipeline, reduce the failure of pipeline air tightness test results caused by airbag leakage, and improve the accuracy of pipeline functional test.

[0009] Optionally, a connecting plate is provided between the main airbag and the auxiliary airbag, and the connecting plate has a connecting hole.

[0010] By adopting the above technical solution, the connecting plate can ensure that the connection between the main airbag and the auxiliary airbag extends in the pipeline, ensure that the peripheral wall of the auxiliary airbag can abut against the inner wall of the pipeline, reduce the pressure on the main airbag from inside the pipeline, ensure the airtightness of the contact surface between the main airbag and the inner wall of the pipeline, and the connecting hole on the connecting plate connects the main airbag and the auxiliary airbag, so that the auxiliary airbag and the main airbag can be inflated at the same time.

[0011] Optionally, a flange is connected to the main airbag, and the flange is fitted onto the airbag inflation tube and the pipeline inflation tube.

[0012] By adopting the above technical solutions, the flange can increase the structural strength and airtightness of the connection between the airbag inflation tube, the pipeline inflation tube and the main airbag, and extend the service life of the airbag.

[0013] Optionally, an air supply pipe is provided on the flange, and an air supply valve is installed on the section of the air supply pipe that extends out of the main air bag.

[0014] By adopting the above technical solution, it is convenient for staff to open the air replenishment valve in a timely manner to replenish air into the main airbag and auxiliary airbag, reduce the decrease in air tightness of the contact surface between the airbag and the inner wall of the pipeline due to insufficient air pressure, ensure the stability of the airbag operation, ensure the air tightness of the contact surface between the airbag and the inner wall of the pipeline, and ensure the accuracy of the pipeline air tightness test results.

[0015] Optionally, a check valve is installed on the airbag inflation tube.

[0016] By adopting the above technical solution, the check valve can prevent the gas in the main airbag and auxiliary airbag from flowing out through the airbag inflation tube, ensuring the stability of the air pressure inside the airbag, ensuring the airtightness of the contact surface between the airbag and the inner wall of the pipeline, and ensuring the accuracy of the pipeline air tightness test results.

[0017] Optionally, a pressure gauge is installed on a section of the airbag inflation tube extending out of the main airbag.

[0018] By adopting the above technical solution, staff can obtain the air pressure in the main airbag and auxiliary airbag by observing the air pressure gauge. This allows staff to open the air supply valve in a timely manner to replenish air into the main airbag and auxiliary airbag, reducing the decrease in air tightness at the contact surface between the airbag and the inner wall of the pipeline due to insufficient air pressure. This ensures the stability of the airbag operation, the air tightness of the contact surface between the airbag and the inner wall of the pipeline, and the accuracy of the pipeline air tightness test results.

[0019] Optionally, a pressure gauge is installed on a section of the inflation tube extending out of the main airbag.

[0020] By adopting the above technical solution, staff can obtain the air pressure inside the test pipeline by observing the pipeline pressure gauge, which facilitates the pipeline air tightness test and ensures the accuracy of the pipeline air tightness test results.

[0021] Optionally, both the main airbag and the auxiliary airbag are equipped with handles.

[0022] By adopting the above technical solution, the handle makes it easier for staff to move the airbag, reduces the tension on the peripheral walls of the main airbag and auxiliary airbag when the airbag is moved, and ensures the stability and safety of the airbag operation.

[0023] In summary, this application has the following technical effects:

[0024] 1. By setting up a main airbag and an auxiliary airbag, the pressure from inside the pipeline on the main airbag can be reduced, the deformation of the main airbag caused by the pressure inside the pipeline can be reduced, and the airtightness of the contact surface between the main airbag and the inner wall of the pipeline can be ensured. At the same time, the auxiliary airbag can increase the contact area between the airbag and the inner wall of the pipeline, improve the airtightness of the contact surface between the airbag and the inner wall of the pipeline, reduce the failure of pipeline air tightness test results due to airbag leakage, and improve the accuracy of pipeline functional test.

[0025] 2. By setting up an airbag replenishment pipe and a replenishment valve, it is convenient for staff to open the replenishment valve in a timely manner to replenish air into the main airbag and auxiliary airbag, reducing the decrease in air tightness of the contact surface between the airbag and the inner wall of the pipeline due to insufficient air pressure, ensuring the stability of the airbag operation, ensuring the air tightness of the contact surface between the airbag and the inner wall of the pipeline, and ensuring the accuracy of the pipeline air tightness test results.

[0026] 3. By setting a check valve, the gas in the main airbag and auxiliary airbag can be prevented from flowing out through the airbag inflation tube, ensuring the stability of the air pressure inside the airbag, ensuring the airtightness of the contact surface between the airbag and the inner wall of the pipeline, and ensuring the accuracy of the pipeline air tightness test results. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the object of this application;

[0028] Figure 2 This is a structural diagram of this application after it has been opened.

[0029] Explanation of reference numerals in the attached diagram: 1. Main airbag; 11. Connecting plate; 12. Connecting hole; 2. Auxiliary airbag; 3. Flange; 4. Airbag inflation tube; 41. Check valve; 5. Pipeline inflation tube; 51. Pipeline pressure gauge; 6. Inlet tube; 61. Diverter valve; 7. Airbag replenishment tube; 71. Replenishment valve; 72. Replenishment pressure gauge; 8. Handle. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] This application discloses an airbag for functional testing of municipal drainage pipelines, referring to... Figure 1 and Figure 2 The airbag includes a main airbag 1, which is cylindrical. A connecting plate 11 is connected to one end face of the main airbag 1. An auxiliary airbag 2 is connected to the side of the connecting plate 11 away from the main airbag 1. The auxiliary airbag 2 is cylindrical and its outer diameter is larger than that of the main airbag 1. A connecting hole 12 is provided on the surface of the connecting plate 11. A flange 3 is connected to the end face of the main airbag 1 away from the auxiliary airbag 2.

[0032] Reference Figure 2 The flange 3 is equipped with an airbag inflation tube 4 and a pipeline inflation tube 5. One end of the airbag inflation tube 4 is located inside the main airbag 1. One end of the pipeline inflation tube 5 passes through the connecting plate 11 and the auxiliary airbag 2 and extends out of the auxiliary airbag 2 away from the end face of the main airbag 1. The ends of the airbag inflation tube 4 and the pipeline inflation tube 5 that extend out of the main airbag 1 are connected to an air inlet tube 6. A conversion valve 61 is installed on the air inlet tube 6 to control the connection between the air inlet tube 6 and the airbag inflation tube 4 or the pipeline inflation tube 5. A pipeline pressure gauge 51 is installed on the section of the pipeline inflation tube 5 that extends out of the main airbag 1. A check valve 41 is installed on the section of the airbag inflation tube 4 that is located inside the main airbag 1.

[0033] Reference Figure 2 An airbag replenishment pipe 7 is installed on the flange 3. One end of the airbag replenishment pipe 7 extends out of the flange 3 towards the main airbag 1, and the other end of the airbag replenishment pipe 7 extends out of the flange 3 away from the main airbag 1 and is equipped with a replenishment valve 71. A replenishment pressure gauge 72 is installed on the airbag replenishment pipe 7, and the replenishment pressure gauge 72 is located between the replenishment valve 71 and the flange 3.

[0034] Reference Figure 1 Handles 8 are installed on the opposite ends of the main airbag 1 and the auxiliary airbag 2. Two handles 8 are provided at intervals on the end faces of the main airbag 1 or the auxiliary airbag 2.

[0035] When using this airbag, pull handle 8 to place the airbag into the pipeline to be tested. Handle 8 facilitates the movement of the airbag by the operator, reducing the tension on the peripheral walls of the main airbag 1 and auxiliary airbag 2 during movement, ensuring the stability and safety of the airbag operation. Connect the air inlet pipe 6 to the air source, and turn the conversion valve 61 to connect the air inlet pipe 6 to the airbag inflation pipe 4, inflating the main airbag 1. The connecting plate 11 ensures that the connection between the main airbag 1 and the auxiliary airbag 2 extends in the pipeline, ensuring that the peripheral wall of the auxiliary airbag 2 can abut against the inner wall of the pipeline. The outer diameter of the auxiliary airbag 2 is larger than the outer diameter of the main airbag 1, which can reduce the pressure on the main airbag. The main airbag 1 withstands the pressure from inside the pipe, ensuring the airtightness of the contact surface between the main airbag 1 and the inner wall of the pipe. The connecting hole 12 on the connecting plate 11 connects the main airbag 1 and the auxiliary airbag 2, allowing the auxiliary airbag 2 and the main airbag 1 to inflate simultaneously. When both the main airbag 1 and the auxiliary airbag 2 reach the working air pressure, the switching valve 61 is turned to close the connection between the air inlet pipe 6 and the airbag inflation pipe 4. At this time, the check valve 41 can prevent the gas in the main airbag 1 and the auxiliary airbag 2 from flowing out through the airbag inflation pipe 4, ensuring the stability of the air pressure inside the airbag, ensuring the airtightness of the contact surface between the airbag and the inner wall of the pipe, and ensuring the accuracy of the pipe air tightness test results.

[0036] Rotate the switching valve 61 to connect the air inlet pipe 6 with the pipeline inflation pipe 5, so that the gas output from the gas source enters the test pipeline through the pipeline inflation pipe 5. When the gas pressure in the test pipeline reaches the test gas pressure, close the switching valve 61. At this time, the staff can obtain the gas pressure in the test pipeline by observing the pipeline pressure gauge 51, which facilitates the staff to conduct the pipeline air tightness test and ensures the accuracy of the pipeline air tightness test results.

[0037] When using this airbag for pipeline air tightness testing, connect the air source to the airbag replenishment pipe 7. At this time, the operator can observe the air pressure in the main airbag 1 and the auxiliary airbag 2 by observing the replenishment pressure gauge 72. This allows the operator to open the replenishment valve 71 in time to replenish air into the main airbag 1 and the auxiliary airbag 2, reducing the decrease in air tightness at the contact surface between the airbag and the inner wall of the pipeline due to insufficient air pressure. This ensures the stability of the airbag operation, the air tightness at the contact surface between the airbag and the inner wall of the pipeline, and the accuracy of the pipeline air tightness test results.

[0038] After the pipeline air tightness test is completed and the gas in the pipeline is discharged, remove the gas source and open the gas supply valve 71 to discharge the gas in the main airbag 1 and the auxiliary airbag 2. Then pull the handle 8 to move the airbag out of the pipeline. The flange 3 can increase the structural strength and airtightness of the connection between the airbag inflation pipe 4, the pipeline inflation pipe 5, and the airbag gas supply pipe 7 and the main airbag 1, and extend the service life of the airbag.

[0039] This airbag reduces the pressure from inside the pipeline on the main airbag 1 through the auxiliary airbag 2, reduces the deformation of the main airbag 1 caused by the pressure inside the pipeline, and ensures the airtightness of the contact surface between the main airbag 1 and the inner wall of the pipeline. At the same time, the auxiliary airbag 2 can increase the contact area between the airbag and the inner wall of the pipeline, improve the airtightness of the contact surface between the airbag and the inner wall of the pipeline, reduce the failure of pipeline air tightness test results due to airbag leakage, and improve the accuracy of pipeline functional test.

[0040] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An airbag for functional testing of municipal drainage pipelines, characterized in that: The airbag includes a main airbag (1), one end of which is connected to an auxiliary airbag (2). Both the main airbag (1) and the auxiliary airbag (2) are cylindrical and connected to each other. The outer diameter of the auxiliary airbag (2) is larger than that of the main airbag (1). An airbag inflation tube (4) and a pipeline inflation tube (5) are provided through the end face of the main airbag (1). One end of the airbag inflation tube (4) is located inside the main airbag (1), and one end of the pipeline inflation tube (5) extends to the outside of the auxiliary airbag (2). The ends of the airbag inflation tube (4) and the pipeline inflation tube (5) that extend out of the main airbag (1) are connected to an air inlet tube (6). A switching valve (61) is installed on the air inlet tube (6).

2. The airbag for functional testing of municipal drainage pipelines according to claim 1, characterized in that: A connecting plate (11) is connected between the main airbag (1) and the auxiliary airbag (2), and a connecting hole (12) is provided on the connecting plate (11).

3. The airbag for functional testing of municipal drainage pipelines according to claim 1, characterized in that: A flange (3) is connected to the main airbag (1), and the flange (3) is sleeved on the airbag inflation tube (4) and the pipeline inflation tube (5).

4. An airbag for functional testing of municipal drainage pipelines according to claim 3, characterized in that: An airbag replenishment pipe (7) is installed on the flange (3), and a replenishment valve (71) is installed on a section of the airbag replenishment pipe (7) that extends out of the main airbag (1).

5. An airbag for functional testing of municipal drainage pipelines according to claim 2, characterized in that: A check valve (41) is installed on the airbag inflation tube (4).

6. An airbag for functional testing of municipal drainage pipelines according to claim 4, characterized in that: The section of the airbag inflator tube (7) extending out of the main airbag (1) is equipped with an inflator pressure gauge (72).

7. An airbag for functional testing of municipal drainage pipelines according to claim 5, characterized in that: A pressure gauge (51) is installed on a section of the inflatable tube (5) that extends out of the main airbag (1).

8. An airbag for functional testing of municipal drainage pipelines according to claim 1, characterized in that: Both the main airbag (1) and the auxiliary airbag (2) are equipped with handles (8).

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