CN213985567U - 'helium cover method' long distance pipeline leakage point investigation positioning device - Google Patents
'helium cover method' long distance pipeline leakage point investigation positioning device Download PDFInfo
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- CN213985567U CN213985567U CN202022134989.9U CN202022134989U CN213985567U CN 213985567 U CN213985567 U CN 213985567U CN 202022134989 U CN202022134989 U CN 202022134989U CN 213985567 U CN213985567 U CN 213985567U
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Abstract
The utility model belongs to the nondestructive testing technology, in particular to a 'helium cover method' long-distance pipeline leak source investigation positioning device which comprises a flow supply and control plate A arranged at the upstream of a tested pipeline, a helium cover connected with the tested pipeline and a helium applying plate B; the helium cover and the helium applying plate B consist of a helium cover, a helium concentration detector, a pressure reducing valve, a helium supply switch, a helium pressure stabilizing tank and a helium bottle; the method comprises the steps of purging a pipeline, removing residual working gas, installing a helium cover on a detected pipe section, performing leak detection after helium is filled in the detected pipe section, performing staged leak detection and positioning on the pipeline in a mode of applying a long-distance helium cover on a process pipeline by taking flange openings at the inlet and the outlet of the pipeline as detection interfaces so as to determine the number and the positions of the leak points of the buried pipeline, and being safe and reliable, and capable of performing leak detection in high-risk places such as inflammable and explosive places, high-temperature places and the like.
Description
Technical Field
The utility model belongs to the nondestructive test technique, concretely relates to pipeline leak source investigation positioner.
Background
Although a plurality of pipeline sealing verification methods exist in the field of nondestructive testing at present, a few technical methods for positioning leakage points of pipelines exist, and particularly, a few methods for positioning the leakage points of outdoor long-distance pipelines exist, so that a new method for positioning the leakage points of long-distance single-walled pipes needs to be developed.
The oil and gas transportation industry mainly preassembles the leak detection device in the pipeline installation stage and needs to periodically electrify weak current to carry out leak detection work. However, the method has low sensitivity of leak points, and is not suitable for transportation pipelines of flammable and explosive media such as hydrogen, chlorine and the like due to the need of electrifying, and the helium leak detection pipette method is also used for positioning the outside of the leak points of the pipelines, but the characteristic of point-by-point investigation is not suitable for long-distance (more than 50 meters) outdoor pipeline leak detection. Therefore, developing an efficient, safe and reliable long-distance pipeline leakage point investigation positioning technology is one of the main directions of method research.
Disclosure of Invention
The utility model aims at providing a "helium cover method" long distance pipeline leak source investigation positioner can be at the accurate location pipeline leak source position of investigation in-process.
The technical scheme of the utility model as follows:
the leakage point checking and positioning device for the long-distance pipeline by the helium cover method comprises a flow supply plate A arranged at the upstream of the detected pipeline, a helium cover connected with the detected pipeline and a helium applying plate B;
the flow supply plate A comprises a compressed air source, an air pressure stabilizing tank, a flow regulating valve, an air switch and a reference leak hole; the compressed air source is connected with the air pressure stabilizing tank, a gas outlet of the air pressure stabilizing tank is connected with an outlet pipeline through a hose joint, and a flow regulating valve, an air switch, a reference leak hole and an upstream connecting flange are sequentially arranged on the outlet pipeline of the air pressure stabilizing tank;
the helium cover and helium applying plate B consists of a helium cover, a pressure reducing valve, a helium supply switch, a helium pressure stabilizing tank and a helium bottle; the pipeline to be detected is communicated with a helium pipeline, a helium cover is arranged at a pipeline joint, the helium pipeline comprises a helium bottle and a helium pressure stabilizing tank which are used for providing a gas source, and a helium supply switch and a pressure reducing valve are sequentially arranged on the helium pipeline along the flowing direction of helium.
The helium cover is a telescopic rubber air bag, and the joint of the helium cover and the pipeline is sealed by a rubber ring.
The flow supply plate A also comprises a flow sensor, a dew point thermometer and a temperature sensor which are all arranged on an outlet pipeline of the air pressure stabilizing tank.
And a bypass pipeline and a bypass switch are connected in parallel at the air inlet end of the air switch and the outlet end of the flow sensor.
And a helium concentration detector and a pressure gauge are arranged on the helium pipeline.
The utility model discloses a show the effect as follows: the long-distance pipeline leakage point investigation positioning device based on the helium cover method uses the flange port positions at the inlet and outlet ends of a pipeline as detection interfaces, and carries out pipeline staged leakage point investigation and positioning in a mode of applying a long-distance helium cover on a process pipeline so as to determine the number and the positions of the leakage points of the buried pipeline.
The helium cover can be flexibly installed and can monitor the pipeline in sections.
The device is particularly suitable for the leakage point investigation and positioning work of outdoor long-distance transport pipelines; when in use, only the termination work is carried out at the two ends of the detected pipeline, so that the structure of the detected pipeline is protected from being damaged to the maximum extent; the leakage detection device is safe and reliable, and can be used for detecting leakage in high-risk places such as inflammable and explosive places, high-temperature places and the like.
Drawings
FIG. 1 is a schematic diagram of a long-distance pipeline leakage point inspection positioning device based on a helium cover method;
in the figure: 1. a compressed air source; 2. an air surge tank; 3. a flow regulating valve; 4. an air switch; 5. a bypass switch; 6. a flow sensor; 7. a dew point thermometer; 8. a temperature sensor; 9. a reference leak point; 10. an upstream connecting flange; 11. a pipeline to be detected; 12. a helium enclosure; 13. a helium concentration detector; 14. a pressure reducing valve; 15. a helium supply switch; 16. a helium pressure stabilizing tank; 17. a helium tank.
Detailed Description
The present invention will be further explained with reference to the drawings and the detailed description.
As shown in figure 1, the long-distance pipeline leakage point checking and positioning device based on the helium cover method comprises an upstream flow supply plate A, a helium cover and a helium applying plate B.
The upstream flow supply block A is composed of a compressed air source 1, an air pressure stabilizing tank 2, a flow regulating valve 3, an air switch 4, a bypass switch 5, a flow sensor 6, a dew point thermometer 7, a temperature sensor 8, a reference leak hole reserved hole 9 and an upstream connecting flange 10 (shown in a block A in the figure).
The compressed air source 1 is connected with the air pressure stabilizing tank 2, the gas outlet of the air pressure stabilizing tank 2 is connected with a pipeline through a hose joint, and the outlet pipeline of the air pressure stabilizing tank 2 is sequentially provided with a flow regulating valve 3, an air switch 4, a flow sensor 6, a dew point thermometer 7, a temperature sensor 8, a reference leak point 9 and an upstream connecting flange 10. And a bypass pipeline and a bypass switch 5 are connected in parallel at the air inlet end of the air switch 4 and the outlet end of the flow sensor 6.
The piping of the upstream flow supply block a uses rigid pressure-bearing hoses.
The upstream flow supply panel a is used to provide various flows of air. Wherein, the air pressure stabilizing tank 2 introduces air from the compressed air source 1 and provides a source of stable pressure; the air switch 4 and the flow sensor 6 are used for controlling the input flow of the inner pipe; the bypass switch 5 is used in a pipeline purging mode and purges residual media in the pipe; the temperature sensor 8 and the dew point temperature sensor 7 are used for collecting temperature and humidity.
The helium cover and helium applying plate B consists of a helium cover 12, a helium concentration detector 13, a pressure reducing valve 14, a helium supply switch 15, a helium pressure stabilizing tank 16 and a helium bottle 17.
The pipeline 11 to be detected is a pipeline led out from the upstream flow supply plate block a, a helium pipeline is communicated with the pipeline through a tee joint, a helium cover 12 is installed at the interface of the pipeline, the helium pipeline comprises a helium bottle 17 and a helium pressure stabilizing tank 16, the helium bottle is used for providing a gas source, and a helium supply switch 15 and a pressure reducing valve 14 are sequentially installed on the helium pipeline along the flowing direction of helium.
The helium cover and helium gas applying plate B is used for providing a steady state helium gas environment for the 'outer side of the detected pipe section'. The helium cover 12 uses a pressure-bearing telescopic rubber air bag, and the joint of the helium cover and the pipeline is sealed by a rubber ring. The pressure relief valve 14 is used to control the pressure in the helium enclosure.
A helium concentration detector 13 is mounted on the helium enclosure 12 for detecting the helium concentration in the helium enclosure.
The connecting pipelines of the helium cover and the helium applying plate B both use hard pressure-bearing hoses.
The helium pressure stabilizing tank 16 is provided with a hose end joint to provide sufficient stable space for the introduced helium and ensure the pressure stability of the inlet of the pressure reducing valve.
Claims (5)
- "helium cover method" long distance pipeline leak source investigation positioner, its characterized in that: comprises a flow supply plate A arranged at the upstream of a detected pipeline (11), a helium cover connected with the detected pipeline (11) and a helium applying plate B;the flow supply plate A comprises a compressed air source (1), an air pressure stabilizing tank (2), a flow regulating valve (3), an air switch (4) and a reference leak hole (9); the compressed air source (1) is connected with the air pressure stabilizing tank (2), the gas outlet of the air pressure stabilizing tank (2) is connected with an outlet pipeline through a hose joint, and the outlet pipeline of the air pressure stabilizing tank (2) is sequentially provided with a flow regulating valve (3), an air switch (4), a reference leak hole (9) and an upstream connecting flange (10);the helium cover and helium applying plate B consists of a helium cover (12), a pressure reducing valve (14), a helium supply switch (15), a helium pressure stabilizing tank (16) and a helium bottle (17); the pipeline (11) to be detected is communicated with a helium pipeline, a helium cover (12) is arranged at the joint of the pipeline, the helium pipeline comprises a helium bottle (17) for providing a gas source and a helium pressure stabilizing tank (16), and a helium supply switch (15) and a pressure reducing valve (14) are sequentially arranged on the helium pipeline along the flowing direction of helium.
- 2. The helium shroud method long-distance pipeline leakage point checking and positioning device as claimed in claim 1, wherein: the helium cover (12) is a telescopic rubber air bag, and the joint of the helium cover and the pipeline is sealed by a rubber ring.
- 3. The helium shroud method long-distance pipeline leakage point checking and positioning device as claimed in claim 1, wherein: the flow supply plate A further comprises a flow sensor (6), a dew point thermometer (7) and a temperature sensor (8), which are all arranged on an outlet pipeline of the air pressure stabilizing tank (2).
- 4. The helium shroud method long-distance pipeline leakage point checking and positioning device as claimed in claim 3, wherein: and a bypass pipeline and a bypass switch (5) are connected in parallel at the air inlet end of the air switch (4) and the outlet end of the flow sensor (6).
- 5. The helium shroud method long-distance pipeline leakage point checking and positioning device as claimed in claim 1, wherein: and a helium concentration detector (13) and a pressure gauge are arranged on the helium pipeline.
Priority Applications (1)
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CN202022134989.9U CN213985567U (en) | 2020-09-25 | 2020-09-25 | 'helium cover method' long distance pipeline leakage point investigation positioning device |
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CN202022134989.9U CN213985567U (en) | 2020-09-25 | 2020-09-25 | 'helium cover method' long distance pipeline leakage point investigation positioning device |
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