Air injection air bag and sewage pipeline air check test detection device

Abstract

The utility model relates to the technical field of air bags, in particular to an air injection air bag and a sewage pipeline air check test detection device. Comprising an air compressor, a plugging air bag and an air injection air bag, the plugging air bag and the air injection air bag are arranged at the two ends of a sewage pipeline respectively, and the air injection air bag comprises a first air bag body, a first upper protective cover, a first lower protective cover, a middle hole pipe and a plurality of supporting sets; a middle-hole pipe is arranged in the first airbag, one end of the middle-hole pipe penetrates through the first upper protective cover, and the other end of the middle-hole pipe penetrates through the first lower protective cover; a first air bag quick connector is arranged on the first upper protective cover and communicates with the interior of the first air bag, and the end, extending out of the first upper protective cover, of the middle hole pipe communicates with an air compressor; a plurality of supporting groups are arranged on the outer side wall of the first air bag; the detection time and the detection cost are reduced, and the detection accuracy is improved.

Description

An air-filled bladder and a sewage pipeline air tightness test device Technical Field

[0001] This utility model relates to the field of airbag technology, and in particular to an inflatable airbag and a sewage pipeline air tightness test device. Background Technology

[0002] To prevent soil and groundwater pollution, it is necessary to investigate leakage sources, with buried sewage pipelines being a key focus. Currently, commonly used methods for detecting leakage in sewage pipelines include water tightness tests or robotic inspections.

[0003] The water tightness test method involves injecting water into the pipeline and maintaining a certain water head height, then observing the drop in water level or the amount of water added to determine the leakage situation. This method has disadvantages such as being time-consuming, using a large amount of water, wasting water resources, requiring various mechanical equipment such as water tankers and water pumps for pumping and injecting water, being relatively complex to operate, costly, and having low detection accuracy.

[0004] Robotic inspection methods utilize cameras-equipped inspection robots to crawl or walk inside pipes, acquiring high-definition images and videos of the pipe interior. By analyzing this data, defects such as cracks, corrosion, leaks, deformation, and blockages on the pipe's inner wall are identified, and the location of these defects is determined using a positioning system, such as inertial navigation or odometry. However, this method suffers from reduced accuracy when the pipe's inner wall is corroded or scaled, due to its strong reliance on image quality, making it difficult to accurately detect small cracks and micro-leaks. Furthermore, environmental interference such as water, oil, and sediment can affect the operation of the cameras and sensors, and complex, winding, or narrow pipes can limit the robot's mobility and positioning accuracy. Additionally, the high cost of equipment and data processing limits its widespread applicability.

[0005] Therefore, there is an urgent need to provide an air-filled bladder and a sewage pipeline air tightness test device that, compared with existing technologies, reduces testing time and cost and improves testing accuracy. Summary of the Invention

[0006] This invention addresses the technical problems existing in the prior art by providing an air-filled airbag and a device for testing and detecting the air tightness of sewage pipelines.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] An inflatable airbag includes a first airbag, a first metal ring, a first upper protective cover, a first lower protective cover, a central tube, and multiple support assemblies. Both ends of the first airbag are connected to the first metal ring. The first upper protective cover is connected to one end of the first metal ring, and the first lower protective cover is connected to the other end of the first metal ring. The central tube is disposed inside the first airbag, with one end passing through the first upper protective cover and the other end passing through the first lower protective cover. The first upper protective cover has a first airbag quick-connect interface, which communicates with the interior of the first airbag. A central tube quick-connect interface is disposed at the end of the central tube extending out of the first upper protective cover. Multiple support assemblies are disposed on the outer sidewall of the first airbag.

[0009] Furthermore, multiple support groups are spaced apart along the axis of the first airbag, and each support group includes multiple support components, with the multiple support components in each support group being spaced apart circumferentially along the first airbag.

[0010] Furthermore, the support assembly includes a support plate and a plurality of support columns. The support plate is fixedly connected to the outer sidewall of the first airbag, and the plurality of support columns are fixedly connected to the end face of the support plate away from the first airbag.

[0011] Furthermore, the support column includes a first telescopic column, a second telescopic column, and a support block. One end of the second telescopic column is slidably connected inside the first telescopic column, and the other end is fixedly connected to the support block. The end of the first telescopic column away from the second telescopic column is fixedly connected to the support plate. A spring is fixedly connected to the bottom of the first telescopic column, and the end of the spring away from the first telescopic column is fixedly connected to the end of the second telescopic column.

[0012] Furthermore, the support block is hemispherical.

[0013] Furthermore, the first upper protective cover is provided with a first lifting ring.

[0014] A sewage pipeline air tightness test device includes an air compressor, a three-way quick connector, a sealing airbag, and an injection airbag. The sealing airbag and the injection airbag are respectively installed at both ends of the sewage pipeline. The air compressor is connected to the central quick connector of the injection airbag through the three-way quick connector.

[0015] Furthermore, the three-way quick-connect interface is equipped with a pressure gauge, an air tube quick-connect interface, and an air injection quick-connect interface. The pressure gauge is connected to the air injection quick-connect interface, the air tube quick-connect interface is connected to the air compressor, and the air injection quick-connect interface is also connected to the first airbag quick-connect interface or the central hole tube quick-connect interface; the air injection quick-connect interface is equipped with a valve.

[0016] Furthermore, the occlusion airbag includes a second airbag, a second metal ring, a second upper protective cover, a second lower protective cover, and multiple support assemblies. Both ends of the second airbag are connected to the second metal ring, with the second upper protective cover connected to one end of the second metal ring and the second lower protective cover connected to the other end of the second metal ring. The second upper protective cover is provided with a second airbag quick-connect interface, which communicates with the interior of the second airbag. Multiple support assemblies are provided on the outer sidewall of the second airbag. The second upper protective cover is provided with a second lifting ring.

[0017] Furthermore, the air compressor is mounted on the ground and is electrically connected to a power source.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention involves installing an air-injection bladder and a sealing bladder at both ends of a sewage pipe, with a centrally located tube inside the air-injection bladder. After the sewage pipe is sealed by the air-injection and sealing bladders, air can be injected into the pipe. By measuring the pressure change within the sewage pipe, the success of the air tightness test can be determined. Simultaneously, multiple support components are installed on the outer sidewalls of both the air-injection and sealing bladders to increase the friction between them and the sewage pipe, ensuring their stability during testing. This reduces testing time and costs, and improves the accuracy of the sewage pipe air tightness test. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0021] Figure 2 is a structural schematic diagram of the three-way quick-connect interface in Embodiment 1 of this utility model.

[0022] Figure 3 is a schematic diagram of the sealing airbag in Embodiment 1 of this utility model.

[0023] Figure 4 is a schematic diagram of the structure of the air-injection bladder in Embodiment 2 of this utility model.

[0024] Figure 5 is a structural schematic diagram of Embodiment 3 of this utility model.

[0025] Figure 6 is an enlarged view of point A in Figure 5 of this utility model.

[0026] Figure 7 is a cross-sectional view of the support component in Embodiment 3 of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Power supply; 2. Air compressor; 3. Tee quick connector; 31. Pressure gauge; 32. Air pipe quick connector; 33. Valve; 34. Inflation quick connector; 4. Inflation airbag; 41. First airbag quick connector; 42. Central hole quick connector; 43. First lifting ring; 44. First upper protective cover; 45. First metal ring clamp; 46. First airbag; 47. First lower protective cover; 48. Central hole pipe; 5. Sealing airbag; 51. Second airbag quick connector; 52. Second lifting ring; 53. Second upper protective cover; 54. Second lower protective cover; 55. Second metal ring clamp; 56. Second airbag; 6. Support assembly; 61. Support plate; 62. First telescopic column; 63. Second telescopic column; 64. Support block; 65. Spring; 7. Sewage pipe; 8. Inspection well. Detailed Implementation

[0029] The technical solution of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Example 1

[0031] As shown in Figure 1, this embodiment provides a sewage pipeline air tightness test detection device, including a power supply 1, an air compressor 2, a three-way quick connector 3, an air injection bladder 4, and a sealing bladder 5. Both ends of the sewage pipeline 7 are provided with inspection wells 8. The two ends inside the sewage pipeline 7 are respectively provided with an air injection bladder 4 and a sealing bladder 5. The opposite ends of the air injection bladder 4 and the sealing bladder 5 extend out of the sewage pipeline 7 and are in contact with the sewage pipeline 7. The end of the air injection bladder 4 extending out of the sewage pipeline 7 is connected to the three-way quick connector 3. The three-way quick connector 3 is connected to the air compressor 2 through an air pipe. The air compressor 2 is set on the ground and is electrically connected to the power supply 1. The power supply 1 is a portable type.

[0032] As shown in Figure 2, the three-way quick-connect interface 3 has three interfaces. One of the interfaces of the three-way quick-connect interface 3 is connected to a pressure gauge 31. The second interface of the three-way quick-connect interface 3 is designated as an air tube quick-connect interface 32, and the third interface of the three-way quick-connect interface 3 is designated as an air injection quick-connect interface 34. The air injection quick-connect interface 34 is equipped with a valve 33, which controls the opening and closing of the air injection quick-connect interface 34. The air tube quick-connect interface 32 is connected to an air tube, and the air injection quick-connect interface 34 is used to connect to the inside of the air injection bladder 4, the inside of the sealing bladder 5, and the inside of the sewage pipe 7.

[0033] When the quick-connect air inlet 34 is connected to the inside of the air inlet 4, the pressure gauge 31 is used to measure the air pressure inside the air inlet 4; when the quick-connect air inlet 34 is connected to the inside of the sealing airlet 5, the pressure gauge 31 is used to measure the air pressure inside the sealing airlet 5; when the quick-connect air inlet 34 is connected to the inside of the sewage pipe 7, the pressure gauge 31 is used to measure the pressure inside the sewage pipe 7.

[0034] As shown in Figure 3, the sealing airbag 5 includes a second airbag quick-connect interface 51, a second lifting ring 52, a second upper protective cover 53, a second lower protective cover 54, a second metal ring 55, and a second airbag 56. A second metal ring 55 is fixedly connected to each end of the second airbag 56. The end of the second metal ring 55 away from the second airbag 56 is connected to the second upper protective cover 53, and the end of the second metal ring 55 away from the second airbag 56 is connected to the second lower protective cover 54. The second upper protective cover 53 has the second airbag quick-connect interface 51 and the second lifting ring 52 at its end. The second airbag quick-connect interface 51 communicates with the interior of the second airbag 56. When inflating the sealing airbag 5, the second airbag quick-connect interface 51 communicates with the air injection quick-connect interface 34 for inflation. The second lifting ring 52 facilitates the removal and placement of the sealing airbag 5. The second airbag 56 is made of synthetic rubber, and an elastic protective layer is provided on its outer side. The extension length of the second airbag 56 along the sewage pipe 7 is 38-66 cm.

[0035] Working principle of a sewage pipeline airtightness test detection device provided in this embodiment: The plugging airbag 5 and the air injection airbag 4 are arranged at both ends of the sewage pipeline 7. First, connect the air injection quick interface 34 in the three-way quick interface 3 with the second airbag quick interface 51 of the plugging airbag 5, start the air compressor 2, and inject air into the plugging airbag 5 through the air compressor 2. Observe the reading of the pressure gauge 31 during the air injection process, and make the working pressure in the plugging airbag 5 reach about 200 - 300 kPa, so that the plugging airbag 5 expands and fully contacts the inner wall of the sewage pipeline 7. Then, connect the air injection quick interface 34 in the three-way quick interface 3 with the first airbag quick interface 41 of the air injection airbag 4, start the air compressor 2, and inject air into the air injection airbag 4 through the air compressor 2. Observe the reading of the pressure gauge 31 during the air injection process, and make the working pressure in the air injection airbag 4 reach about 200 - 300 kPa, so that the air injection airbag 4 expands and fully contacts the inner wall of the sewage pipeline 7. After that, close the valve 33 of the three-way quick interface 3, connect the air injection quick interface 34 with the middle hole pipe quick interface 42 of the air injection airbag 4, open the valve 33, and inject air into the sewage pipeline 7 through the air injection airbag 4. Observe the reading of the pressure gauge 31 during the air injection process, and make the pressure in the sewage pipeline 7 reach 3000 Pa. Then close the valve 33 and stop air intake.

[0036] Spray the foaming liquid evenly on the contact interface between the plugging airbag 5 and the pipe wall of the sewage pipeline 7 and on the contact interface between the air injection airbag 4 and the pipe wall of the sewage pipeline 7 respectively, and observe whether there is air leakage at the contact interface. If there is air leakage, check the reason and eliminate interference (such as rotating and adjusting the position of the air injection airbag 4 or the plugging airbag 5 or cleaning the inner wall of the sewage pipeline 7 again), and reposition the air injection airbag 4 and the plugging airbag 5 and check until it is confirmed that both the air injection airbag 4 and the plugging airbag 5 are in good contact and sealing with the pipe wall of the sewage pipeline 7.

[0037] After confirming that the plugging airbag 5 and the air injection airbag 4 are in good contact with the pipe wall of the sewage pipeline 7, officially start the pipeline airtightness detection; inject air into the sewage pipeline 7 through the air compressor 2, and after the air pressure in the sewage pipeline 7 reaches about 3000 Pa, close the valve 33 to make the gas tend to be stable. Record the time taken for the reading of the pressure gauge to drop from 3000 Pa to 2000 Pa, and the duration should not be less than 5 minutes. If the air pressure drops rapidly, appropriate air can be supplemented. If it drops too slowly, appropriate air can be released. When the pressure in the sewage pipeline 7 drops to 2000 Pa, start timing again, and time for about 1 - 5 minutes. When the timing ends, record the gas pressure in the sewage pipeline 7. When the recorded gas pressure in the sewage pipeline 7 is greater than or equal to 1500 Pa, it proves that the airtightness test of the sewage pipeline 7 is qualified, otherwise it is unqualified.

[0038] Example 2

[0039] As shown in Figure 4, this embodiment provides an inflation airbag 4, including a first airbag 46, a first metal ring 45, a first upper protective cover 44, a first lower protective cover 47, and a central tube 48. The first metal ring 45 is fixedly connected to both ends of the first airbag 46. The end of the first metal ring 45 away from the first airbag 46 is connected to the first upper protective cover 44, and the end of the first metal ring 45 away from the first airbag 46 is connected to the first lower protective cover 47. The central tube 48 is provided inside the first airbag 46. One end of the central tube 48 passes through the first metal ring 45 and the first upper protective cover 44, and the other end of the central tube 48 passes through the first metal ring 45 and the first lower protective cover 47. The end of the central tube 48 passing through the first upper protective cover 44 is connected to the central tube quick connector 42. The first upper protective cover 44 is also provided with a first airbag quick connector 41, which is connected to the inside of the first airbag 46. The first upper protective cover 44 is also provided with a first hanging ring 43. The first airbag 46 is made of synthetic rubber and has an elastic protective layer on the outside. The first airbag 46 extends 38-66cm along the sewage pipe 7.

[0040] The working principle of the air-injection airbag 4 provided in this embodiment is as follows: The air-injection airbag 4 is placed inside one end of the sewage pipe 7. One end of the first upper protective cover 44 of the first airbag 46 is located in the inspection well 8. First, the air pipe of the air compressor 2 is connected to the quick interface 41 of the first airbag to inflate the inside of the first airbag 46 so that the first airbag 46 comes into contact with the inside of the sewage pipe 7. Then, the air pipe of the air compressor 2 is connected to the quick interface 42 of the middle hole pipe to inflate the inside of the sewage pipe 7 and conduct an air tightness test of the sewage pipe 7.

[0041] Example 3

[0042] As shown in Figure 5, the difference between the airbag 4 provided in this embodiment and that in embodiment 2 is that: multiple support groups are provided on the outside of the first airbag 46, the multiple support groups are spaced apart along the axis of the first airbag 46, each support group includes multiple support components 6, and the multiple support components 6 in each support group are spaced apart along the circumference of the first airbag 46.

[0043] As shown in Figures 6 and 7, the support assembly 6 includes a support plate 61 and multiple support columns. The support plate 61 is fixedly connected to the outer wall of the first airbag 46. Multiple support columns are fixedly connected to the end face of the support plate 61 away from the first airbag 46. Each support column includes a first telescopic column 62, a second telescopic column 63, a support block 64, and a spring 65. The second telescopic column 63 is slidably connected inside the first telescopic column 62. The end of the first telescopic column 62 away from the second telescopic column 63 is fixedly connected to the support plate 61. The end of the second telescopic column 63 away from the first telescopic column 62 is fixedly connected to the support block 64. The support block 64 is hemispherical. Both the first telescopic column 62 and the second telescopic column 63 are hollow structures. The bottom inner part of the first telescopic column 62 is fixedly connected to the spring 65. The end of the spring 65 away from the first telescopic column 62 is fixedly connected to the top inner part of the second telescopic column 63.

[0044] The working principle of the air-inflating airbag 4 provided in this embodiment is as follows: After the air-inflating airbag 4 is placed into the sewage pipe 7, it is connected to the quick-connect interface 41 of the first airbag through the air pipe of the air compressor 2, and the first airbag 46 is inflated. When the first airbag 46 is fully inflated, the arc end of the support block 64 abuts against the inner wall of the sewage pipe 7. Since the first airbag 46 is made of soft material, it will abut against the support column set on the outer side of each support plate 61. The support block 64 exerts a force on the sewage pipe 7 under the action of the spring 65. At the same time, the sewage pipe 7 also exerts a force on the support block 64, which can increase the friction between the first airbag 46 and the sewage pipe 7, ensuring that the position of the first airbag 46 in the sewage pipe 7 does not change. At the same time, after the first airbag 46 is inflated, it exerts a force on the support column on each support block 64, squeezing each support component 6 and fixing the position of each support component 6.

[0045] Example 4

[0046] This embodiment provides a sewage pipeline 7 air tightness test detection device. The difference between this embodiment and embodiment 1 is that the air-injection airbag 4 in embodiment 1 is replaced with the air-injection airbag 4 in embodiment 3, and the sealing airbag 5 in embodiment 1 is provided with multiple support components 6 in embodiment 3.

[0047] This invention involves installing an air-injection bladder 4 and a sealing bladder 5 at both ends of a sewage pipe 7, with a central hole tube 48 inside the air-injection bladder 4. After the sewage pipe 7 is sealed by the air-injection bladder 4 and the sealing bladder 5, air can be injected into the sewage pipe 7. By measuring the pressure change inside the sewage pipe 7, the success of the air tightness test can be determined. At the same time, multiple support components 6 are provided on the outer sidewalls of the air-injection bladder 4 and the sealing bladder 5, which can improve the friction between the air-injection bladder 4 and the sealing bladder 5 and the sewage pipe 7, ensuring the stability of the air-injection bladder 4 and the sealing bladder 5 during the test. This reduces the test time and cost, and also improves the accuracy of the air tightness test of the sewage pipe 7.

[0048] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. An inflatable airbag, characterized in that, The device includes a first airbag, a first metal ring, a first upper protective cover, a first lower protective cover, a central tube, and multiple support assemblies. Both ends of the first airbag are connected to the first metal ring. The first upper protective cover is connected to one end of the first metal ring, and the first lower protective cover is connected to the other end of the first metal ring. The central tube is disposed inside the first airbag, with one end passing through the first upper protective cover and the other end passing through the first lower protective cover. The first upper protective cover has a first airbag quick-connect interface, which communicates with the interior of the first airbag. A central tube quick-connect interface is disposed at the end of the central tube extending out of the first upper protective cover. Multiple support assemblies are disposed on the outer sidewall of the first airbag.

2. The air-filled airbag according to claim 1, characterized in that, Multiple support groups are spaced apart along the axis of the first airbag, and each support group includes multiple support components, with the multiple support components in each support group spaced apart circumferentially along the first airbag.

3. The inflatable airbag according to claim 2, characterized in that, The support assembly includes a support plate and multiple support columns. The support plate is fixedly connected to the outer sidewall of the first airbag, and the multiple support columns are fixedly connected to the end face of the support plate away from the first airbag.

4. An inflatable airbag according to claim 3, characterized in that, The support column includes a first telescopic column, a second telescopic column, and a support block. One end of the second telescopic column is slidably connected inside the first telescopic column, and the other end is fixedly connected to the support block. The end of the first telescopic column away from the second telescopic column is fixedly connected to the support plate. A spring is fixedly connected to the bottom of the first telescopic column, and the end of the spring away from the first telescopic column is fixedly connected to the end of the second telescopic column.

5. An inflatable airbag according to claim 4, characterized in that, The support block is hemispherical.

6. An inflatable airbag according to claim 1, characterized in that, The first upper protective cover is equipped with a first lifting ring.

7. A sewage pipeline air tightness test and detection device, characterized in that, The device includes an air compressor, a three-way quick connector, a sealing airbag, and an injection airbag as described in any one of claims 1-6. The sealing airbag and the injection airbag are respectively disposed at both ends of a sewage pipe, and the air compressor is connected to the central quick connector of the injection airbag through the three-way quick connector.

8. The sewage pipeline air tightness test and detection device according to claim 7, characterized in that, The three-way quick-connect interface is equipped with a pressure gauge, an air tube quick-connect interface, and an air injection quick-connect interface. The pressure gauge is connected to the air injection quick-connect interface, the air tube quick-connect interface is connected to the air compressor, and the air injection quick-connect interface is also connected to the first airbag quick-connect interface or the central hole tube quick-connect interface. The air injection quick-connect interface is equipped with a valve.

9. The sewage pipeline air tightness test and detection device according to claim 7, characterized in that, The occlusion airbag includes a second airbag, a second metal ring, a second upper protective cover, a second lower protective cover, and multiple support assemblies. Both ends of the second airbag are connected to the second metal ring. The second upper protective cover is connected to the second metal ring at one end, and the second lower protective cover is connected to the second metal ring at the other end. The second upper protective cover is provided with a second airbag quick-connect interface, which communicates with the interior of the second airbag. Multiple support assemblies are provided on the outer sidewall of the second airbag. The second upper protective cover is provided with a second lifting ring.

10. A sewage pipeline air tightness test and detection device according to claim 7, characterized in that, The air compressor is installed on the ground and is electrically connected to a power source.

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