CN114324109A - Interior bushing pipe gas permeation detection device - Google Patents
Interior bushing pipe gas permeation detection device Download PDFInfo
- Publication number
- CN114324109A CN114324109A CN202111617615.5A CN202111617615A CN114324109A CN 114324109 A CN114324109 A CN 114324109A CN 202111617615 A CN202111617615 A CN 202111617615A CN 114324109 A CN114324109 A CN 114324109A
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- Prior art keywords
- steel pipe
- ball valve
- test element
- lining
- gas permeation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Abstract
The invention discloses a lining pipe gas permeation detection device which comprises a steel pipe, a lining plastic pipe, a welding pipe nozzle, a test element support, a buffer tank, a high-pressure ball valve and a test element, wherein flange pieces are welded at two ends of the steel pipe and used for connecting flange blind plates, a steel pipe air outlet hole is formed in one end of the steel pipe, the welding pipe nozzle is of a cylindrical hollow structure and fixedly arranged at a position concentric with the steel pipe air outlet hole, the test element support is connected to the welding pipe nozzle, a threaded hole for mounting the test element is formed in the surface of the test element support, the buffer tank is of an internal hollow structure, the lower portion and the upper portion of the buffer tank are respectively connected with a first high-pressure ball valve and a second high-pressure ball valve through connecting pieces, the first high-pressure ball valve is connected to the upper end portion of the test element support, and the second high-pressure ball valve is further connected with a flowmeter. The device has the advantages of novel structure and high realization precision, solves the problem that the existing gas permeation detection device cannot evaluate the gas permeation performance of the plastic pipeline, and has great application prospect.
Description
Technical Field
The invention belongs to the technical field of pipe performance detection, and particularly relates to a gas permeation detection device for a lining pipe.
Background
In the field of oil fields, the cumulative amount of penetration protection in the HTPO of the oil and gas field ground gathering and transporting pipeline is more and more, which accounts for about 16.9 percent of the total pipeline application amount, and the application effect in the oil field ground gathering and transporting pipeline is good, so that the corrosion and penetration number of the pipeline is reduced to 0.26 times/hundred kilometers/year. According to statistics, the collapse failure of the HTPO lining pipe accounts for 24% of the total accumulated failure times of the protective pipeline of the lining pipe. Collapse and failure of the HTPO lining pipe are caused by fluctuation of terrain elevation, joint connection, permeation of micromolecular gas to the interlayer and the like. Therefore, the research on the exhaust process of the interlayer gas of the HTPO lining pipe needs to be developed by combining the application experience and effect of the collapse prevention technology of the non-metal lining pipe at home and abroad, and a scheme is formulated for field test so as to ensure the safe and reliable service operation of the HTPO lining pipe.
The existing gas permeation detection device is commonly used for films and sheet materials, such as a G2/131 gas permeameter tester, a VAC-V2 gas permeameter, a GDP-C gas permeability tester and the like, the area of a test sample is small, the thickness of the film is small, the reference significance for the gas permeation performance of the tubes with certain wall thickness and large length is small, the instrument has high requirements on the types of the test gases, few types of the test gases and small test pressure which is generally between 0.2 and 0.6MPa, the conveying pressure of a ground gathering and conveying pipeline of an oil and gas field is more than 2MPa, and the test pressure of the instrument is difficult to be combined with the practical application. For tubular product class, current product is mostly tubular product gas tightness detection device, detects the reduction to the infiltration capacity. Patent "a tubular product gas permeability testing arrangement", publication No.: CN203811338U discloses a device for detecting gas permeation amount in a pipeline, but the device only tests the pressure of permeated gas, the test data is single, the error is large, the gas permeation amount per unit time of the pipeline cannot be well described, the limitation on the specification of the pipeline is large, and the test efficiency is low.
Disclosure of Invention
Aiming at the problems, the invention provides a lining pipe gas permeation detection device, which solves the technical problems that the existing gas permeation detection device is small in application range, single in test data, low in test efficiency, incapable of detecting the gas permeation amount of a lining plastic pipe and the like.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a lining pipe gas permeation detection device, its characterized in that, includes steel pipe, inside lining plastic tubing, welding mouthpiece, test element support, buffer tank, first high pressure ball valve, second high pressure ball valve and test element, inside lining plastic tubing is inside the steel pipe, steel pipe both ends welding flange piece is connected with the flange blind plate on the flange piece, is close to flange piece predetermined distance department at steel pipe one end and has offered the steel pipe venthole, the welding mouthpiece is cylinder hollow structure, and fixed the setting is on the concentric position with the steel pipe venthole, the lower extreme of test element support is connected on the welding mouthpiece, and the upper end of test element support is connected with first high pressure ball valve, the buffer tank is inside hollow structure, and the lower part and the upper portion of buffer tank are connected with first high pressure ball valve and second high pressure ball valve respectively.
As a technical solution of the present invention, the test element further includes a first temperature sensor, a first pressure sensor and a first pressure gauge which are arranged on the test element support, and further includes a second temperature sensor, a second pressure sensor and a second pressure gauge which are arranged on the flange blind plate.
As a technical solution of the present invention, further, an area between the steel pipe and the lining plastic pipe is an annular area, the annular area is communicated with the inside of the test element support, and two end portions of the annular area are sealed by flange blind plates.
As a technical solution of the present invention, further, the volume of the buffer tank is larger than the volume of the annular region.
As a technical scheme of the invention, further, an end face of one end of the welding nozzle is an arc end face, and the arc end face is attached to the outer diameter of the steel pipe.
As the technical scheme of the invention, further, the preset distance is 50cm away from the flange plate at one end, and the diameter of the air outlet of the steel pipe is 2-5 mm.
As the technical scheme of the invention, further, the flange blind plate and the flange sheet are sealed and fixed through bolts and nuts.
As the technical scheme of the invention, further, a blind plate air inlet hole is also formed in the flange blind plate at one end of the steel pipe and is used for introducing gas to be tested into the pipeline.
As the technical scheme of the invention, further, the lower part and the upper part of the buffer tank are respectively connected with the first high-pressure ball valve and the second high-pressure ball valve through connecting pieces, and the upper part of the second high-pressure ball valve is also connected with a flowmeter.
According to the technical scheme, the device comprises the buffer tank, the welding pipe nozzle, the test element support, the high-pressure ball valve, the flow meter and the like, and the temperature sensor, the pressure gauge and other test elements are respectively arranged in the annular area and the pipe, so that the information of the gas permeation of the permeation plastic pipe, such as temperature, pressure, permeation amount and the like, can be detected.
Drawings
FIG. 1 is a schematic view of a gas permeation testing apparatus for a lining tube according to the present invention;
FIG. 2 is a cross-sectional view of a liner gas permeation testing apparatus according to the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
in the figure: 1. a steel pipe; 2. lining a plastic pipe; 3. welding a nozzle; 4. a test element holder; 5. a buffer tank; 6. a flange sheet; 7. a flange blind plate; 8. a steel pipe air outlet; 9. a connecting member; 10. a first high pressure ball valve; 11. a second high pressure ball valve; 12. a flow meter; 13. a first temperature sensor; 14. a first pressure sensor; 15. a first pressure gauge; 16. a second temperature sensor; 17. a second pressure sensor; 18. a second pressure gauge; 19. a bolt; 20. a nut; 21. a blind plate air inlet hole; 22. a ring-shaped domain.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, a liner pipe gas permeation detection device comprises a steel pipe 1, a liner plastic pipe 2, a welding nozzle 3, a test element support 4, a buffer tank 5, a high-pressure ball valve and a plurality of test elements, wherein the liner plastic pipe 2 is lined in the steel pipe 1, flange pieces 6 are welded at two ends of the steel pipe 1 and used for connecting flange blind plates 7, a 2-5mm steel pipe gas outlet 8 is formed at one end of the steel pipe 1, which is close to the flange pieces (for example, at a position 50cm away from the flange pieces) (the steel pipe gas outlet 8 cannot be too large, so that the liner plastic pipe 2 is damaged), which can ensure that the liner plastic pipe 2 is not damaged due to internal gas pressure, and can ensure that an annular space region (hereinafter referred to as an annular region 22) between the liner plastic pipe 2 and the steel pipe 1 is communicated with the interior of the test element support 4 under high pressure;
The lower end of the test element support 4 is connected to the upper end of the welding nozzle 3 through threads, three threaded holes for mounting test elements are formed in the surface of the test element support 4, and a first temperature sensor 13, a first pressure sensor 14 and a first pressure gauge 15 are mounted respectively and used for detecting the temperature and the pressure in the annular region 22.
The first high-pressure ball valve 10 is connected to the upper end of the test element support 4 through threads, and the upper end of the second high-pressure ball valve 11 is also connected with a flow meter 12.
The upper part of the welding nozzle of the invention comprises the following components in sequence: the welding nozzle 3, the test element bracket 4, the first high-pressure ball valve 10, the connecting piece 9, the buffer tank 5, the connecting piece 9, the second high-pressure ball valve 11 and the flowmeter 12 are fixedly connected through a thread device.
The flange blind plate 7 and the flange sheet 6 are sealed and fixed through the bolts 19 and the nuts 20, the flange blind plate 7 is also provided with a blind plate air inlet hole 21, and air is input into the plastic pipeline through the blind plate air inlet hole 21. And the flange blind plates 7 at the two ends of the steel pipe 1 are provided with test elements such as a second temperature sensor 16, a second pressure sensor 17, a second pressure gauge 18 and the like, and the test elements are used for detecting the temperature and the pressure of gas in the plastic pipe.
The invention relates to a gas permeation detection device for a lining pipe, which comprises the following steps during operation: and closing the first high-pressure ball valve 10 and the second high-pressure ball valve 11, injecting the gas to be detected into the lining plastic pipe 2 through the blind plate gas inlet 21 on the flange blind plate 7, keeping the pressure constant for a certain time, and clearly reading the internal gas pressure by observing and comparing the first pressure sensor 14, the second pressure sensor 17, the first pressure gauge 15 and the second pressure gauge 18. When the gas in the plastic pipe permeates into the annular area 22 and the pressure in the plastic pipe is consistent, the first high-pressure ball valve 10 is opened to enable the gas to be filled into the buffer tank 5 to be decompressed (the process is fast because the permeation is very slow, the influence can be ignored), and when the pressure is reduced to the pressure range of the flow meter, the second high-pressure ball valve 11 is opened to measure the gas flow through the flow meter 12.
The device can test the permeation amount of plastic pipes made of different materials to different gases at a certain temperature and under a certain pressure, and can test gases with higher pressure due to the existence of the buffer. The device can evaluate the barrier performance of plastic pipes made of different materials to specific gas, thereby ensuring safe and reliable service operation of the lining pipe.
In summary, according to the technical scheme of the present invention, by providing the buffer tank, the welding nozzle, the test element support, the high pressure ball valve, the flow meter, and the like, and by respectively providing the temperature sensor, the pressure gauge, and the like in the annular region and the pipe, information such as temperature, pressure, and the like of the permeated gas in the annular region inside and outside the pipe of the plastic pipe can be monitored in real time, when the gas permeates to the annular region and the pressure inside the plastic pipe is consistent, detection is performed, the gas pressure in the annular region is measured, and the permeated gas flow information is measured by the flow meter.
The device provided by the invention has the advantages of novel structure, convenience in operation and high detection precision, solves the problem that the existing gas permeation detection device cannot evaluate the gas permeation performance of the plastic pipeline, and has a great application prospect.
Claims (9)
1. A gas permeation detection device for a lining pipe is characterized by comprising a steel pipe (1), a lining plastic pipe (2), a welding nozzle (3), a test element support (4), a buffer tank (5), a first high-pressure ball valve (10), a second high-pressure ball valve (11) and a test element, wherein the lining of the lining plastic pipe (2) is arranged in the steel pipe (1), flange sheets (6) are welded at two ends of the steel pipe (1), a flange blind plate (7) is connected onto the flange sheets (6), a steel pipe air outlet (8) is formed in one end of the steel pipe (1) close to the flange sheets (6) at a preset distance, the welding nozzle (3) is of a cylindrical hollow structure and is fixedly arranged at a position concentric with the steel pipe air outlet (8), the lower end of the test element support (4) is connected onto the welding nozzle (3), the upper end of the test element support (4) is connected with the first high-pressure ball valve (10), the buffer tank (5) is of a sealed hollow structure, and connectors are arranged on the lower portion and the upper portion of the buffer tank (5) and are respectively connected with the first high-pressure ball valve (10) and the second high-pressure ball valve (11).
2. The liner gas permeation detection apparatus according to claim 1, wherein the test element comprises a first temperature sensor (13), a first pressure sensor (14) and a first pressure gauge (15) arranged on the test element support (4), and further comprises a second temperature sensor (16), a second pressure sensor (17) and a second pressure gauge (18) arranged on the flange blind plate (7).
3. The gas permeation detection device of the lining pipe according to claim 2, wherein the area between the steel pipe (1) and the lining plastic pipe (2) is an annular area (22), the annular area (22) is communicated with the inside of the test element bracket (4), and two ends of the annular area (22) are sealed through flange blind plates (7).
4. A liner gas permeation testing apparatus according to claim 3, wherein the volume of said buffer tank (5) is larger than the volume of said annular region (22).
5. The gas permeation detection device for the lining pipe according to claim 1, wherein an end face of one end of the welding nozzle (3) is an arc end face, and the arc end face is attached to the outer diameter of the steel pipe (1).
6. The gas permeation test device for the lining pipe according to claim 1, wherein the diameter of the gas outlet hole (8) of the steel pipe is 2-5 mm.
7. A lining gas permeation testing device according to claim 1, wherein the flange blind plate (7) and the flange sheet (6) are sealed and fixed by bolts (19) and nuts (20).
8. The lining gas permeation testing device according to claim 7, wherein a blind plate air inlet hole (21) is further formed in the flange blind plate (7) at one end of the steel pipe (1) and used for introducing gas to be tested into the pipeline.
9. A lining gas permeation testing device according to claim 1, wherein the lower part and the upper part of the buffer tank (5) are connected with a first high pressure ball valve (10) and a second high pressure ball valve (11) through a connecting piece (9), respectively, and the upper part of the second high pressure ball valve (11) is further connected with a flow meter (12).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111617615.5A CN114324109A (en) | 2021-12-28 | 2021-12-28 | Interior bushing pipe gas permeation detection device |
| PCT/CN2022/083011 WO2023123705A1 (en) | 2021-12-28 | 2022-03-25 | Gas permeation detection device for lined pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111617615.5A CN114324109A (en) | 2021-12-28 | 2021-12-28 | Interior bushing pipe gas permeation detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114324109A true CN114324109A (en) | 2022-04-12 |
Family
ID=81015248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111617615.5A Pending CN114324109A (en) | 2021-12-28 | 2021-12-28 | Interior bushing pipe gas permeation detection device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114324109A (en) |
| WO (1) | WO2023123705A1 (en) |
Citations (12)
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| CN103674808A (en) * | 2013-12-17 | 2014-03-26 | 中国石油天然气集团公司 | Gas permeability testing device and testing method for full-size nonmetal tube |
| CN203811338U (en) * | 2014-03-12 | 2014-09-03 | 武汉纺织大学 | Tubing gas permeability testing device |
| CN106268347A (en) * | 2016-09-26 | 2017-01-04 | 天津大学 | A kind of cryogenic film segregation apparatus Performance Test System |
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| CN210487482U (en) * | 2019-04-28 | 2020-05-08 | 中国石油化工股份有限公司 | Experimental device for test interior bushing pipe temperature resistant medium resistance ability |
| CN112903562A (en) * | 2021-01-25 | 2021-06-04 | 北京临近空间飞行器系统工程研究所 | Device and method for testing permeability of resin-based composite material |
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2021
- 2021-12-28 CN CN202111617615.5A patent/CN114324109A/en active Pending
-
2022
- 2022-03-25 WO PCT/CN2022/083011 patent/WO2023123705A1/en unknown
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012100631A1 (en) * | 2011-01-27 | 2012-08-02 | 中国商用飞机有限责任公司 | Testing apparatus for testing air permeability on thickness direction of plastic matrix, and method therefor |
| CN103674808A (en) * | 2013-12-17 | 2014-03-26 | 中国石油天然气集团公司 | Gas permeability testing device and testing method for full-size nonmetal tube |
| CN203811338U (en) * | 2014-03-12 | 2014-09-03 | 武汉纺织大学 | Tubing gas permeability testing device |
| CN106268347A (en) * | 2016-09-26 | 2017-01-04 | 天津大学 | A kind of cryogenic film segregation apparatus Performance Test System |
| CN106644886A (en) * | 2016-12-28 | 2017-05-10 | 中国石油天然气集团公司 | Method for testing seepage performance of thermoplastic plastic mixed gas and test device thereof |
| CN107789991A (en) * | 2017-12-04 | 2018-03-13 | 南京九思高科技有限公司 | The detection means and detection method of preferential organic gas seperation film permeance property thoroughly |
| CN109444346A (en) * | 2018-12-18 | 2019-03-08 | 河南省日立信股份有限公司 | Gas on-line monitoring system and monitoring method |
| CN111122416A (en) * | 2020-01-17 | 2020-05-08 | 同济大学 | Test system for measuring gas permeation parameters of ultra-low permeability medium under multi-field multi-phase coupling condition |
| CN213274736U (en) * | 2020-10-14 | 2021-05-25 | 广州信邦智能装备股份有限公司 | Combined air-tightness experiment table |
| CN215004871U (en) * | 2021-03-24 | 2021-12-03 | 国合通用测试评价认证股份公司 | A bushing apparatus for managing appearance hydrogen permeability test |
| CN113188978A (en) * | 2021-06-10 | 2021-07-30 | 中国石油天然气集团有限公司 | Full-size gas permeation detection device for nonmetal composite pipe |
| CN113281187A (en) * | 2021-06-25 | 2021-08-20 | 临海伟星新型建材有限公司 | Pipe pressure resistance testing device and testing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023123705A1 (en) | 2023-07-06 |
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