CN114689805A - Non-bonding flexible pipe annular space detection and exhaust monitoring device - Google Patents
Non-bonding flexible pipe annular space detection and exhaust monitoring device Download PDFInfo
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- CN114689805A CN114689805A CN202210399967.6A CN202210399967A CN114689805A CN 114689805 A CN114689805 A CN 114689805A CN 202210399967 A CN202210399967 A CN 202210399967A CN 114689805 A CN114689805 A CN 114689805A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
- G01N33/0032—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array using two or more different physical functioning modes
Abstract
The invention relates to a non-bonding flexible pipe annular space detection and exhaust monitoring device. The device mainly comprises a non-bonding flexible pipe, a vacuum gas collection unit, a nitrogen injection unit, a gas component detection unit, a data processing unit, an execution unit, an explosion-proof unit, a data storage unit, a non-bonding flexible pipe annular exhaust hole, a thermometer, a pressure gauge, a gas collection bottle, a flowmeter and an exhaust port. The device can be divided into a non-bonding flexible pipe annular exhaust detection part, an annular gas collection part and a nitrogen injection part, wherein the annular exhaust detection part can monitor the components of the exhaust gas in real time and prevent the toxic gas from being exhausted to the atmosphere; the nitrogen injection part can quickly and conveniently judge the annular sealing performance and the annular residual volume of the non-bonded flexible pipe. The detection device can complete operation only on the ocean platform, does not need to discharge water, has low operation cost, and can effectively provide a basis for the integrity evaluation and the residual life analysis of the non-bonded flexible pipe.
Description
Technical Field
The invention relates to a device for measuring the state of an annular space of a non-bonded flexible pipe and monitoring the components of annular discharge gas, in particular to a device for evaluating the annular residual volume of the non-bonded flexible pipe and the integrity of the non-bonded flexible pipe.
Background
With the continuous development and technological innovation of marine oil, the application of marine non-bonded flexible pipes is gradually increased in China in recent years and the marine non-bonded flexible pipes are favored by various oil fields. However, as the service life of the non-bonded flexible pipe is gradually increased, the transport medium inevitably permeates into the annular space through the internal pressure sealing layer, especially permeates gas corroding all layers of the annular space, and in addition, condensed water possibly appears in the annular space of the non-bonded flexible pipe, so that the service performance and the service life of the non-bonded flexible pipe are influenced. In order to ensure the reliability and the integrity of the non-bonded flexible pipe, the non-bonded flexible pipe has to be detected, in particular the state of the annular space of the non-bonded flexible pipe and the gas composition in the annular space are detected to determine the environment of the annular space. However, the marine non-bonded flexible pipe is formed by combining metal layers and polymer layers with different structures together, and the layers are not bonded with each other, so that a complex non-bonded flexible pipe annular space is formed.
Therefore, in order to make up for the vacancy of the domestic marine non-bonded flexible pipe annulus detection technology, a device for detecting the annulus space state and monitoring the annulus exhaust by injecting nitrogen into the annulus is provided, and a basis is provided for the integrity evaluation and the residual life analysis of the non-bonded flexible pipe.
Disclosure of Invention
The purpose of the invention is: in order to solve the problems that the annular structure of the non-bonded flexible pipe is complex and the annular space state is difficult to detect, the annular detection and exhaust monitoring device for the non-bonded flexible pipe is provided, and the annular residual volume of the non-bonded flexible pipe and the integrity of the non-bonded flexible pipe can be quickly and conveniently evaluated.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a flexible pipe ring empty of non-bonding detects and exhaust monitoring devices, mainly comprises flexible pipe, vacuum gas collection unit, notes nitrogen unit, gaseous component detecting element, data processing unit, execution unit, explosion-proof unit, data storage unit, flexible pipe ring empty exhaust hole, thermometer, manometer, flowmeter, gas collecting bottle, gas vent, gas collecting bottle, its characterized in that of non-bonding: the non-bonded flexible pipe is provided with a non-bonded flexible pipe annular air exhaust hole communicated with the non-bonded flexible pipe annular air, and the non-bonded flexible pipe annular air exhaust hole is backwards connected with a thermometer, a pressure gauge, a stop valve, an electromagnetic valve and a four-way valve in sequence; one port of the four-way valve is sequentially connected with the stop valve and the vacuum gas collecting unit, the other port of the four-way valve is sequentially connected with the stop valve and the nitrogen injection unit, and the last port of the four-way valve is sequentially connected with the check valve, the flowmeter and the three-way valve; one outlet of the three-way valve is connected with the two-position three-way electromagnetic valve, and the other outlet of the three-way valve is sequentially connected with the throttle valve, the pressure reducing valve, the gas component detection unit and the two-position three-way electromagnetic valve; an outlet a of the two-position three-way electromagnetic valve is connected with one inlet of the three-way valve, and an outlet b of the two-position three-way electromagnetic valve is sequentially connected with a stop valve and a gas collecting bottle; the outlet c of the two-position three-way electromagnetic valve is connected with the other inlet of the three-way valve, and the outlet d is sequentially connected with a stop valve and a gas collecting bottle; the three-way outlet is connected with the exhaust port; the signal input end of the data processing unit is electrically connected with the gas component detection unit and the explosion-proof unit; and the signal output end of the data processing unit is electrically connected with the execution unit and the data storage unit.
The vacuum gas collection unit is used for collecting gas in the annular space of the non-bonded flexible pipe.
The nitrogen injection unit comprises a nitrogen cylinder, a stop valve, a pressure regulating valve, a flowmeter and a safety valve; the outlet of the safety valve is connected with the inlet of the stop valve; the inlet of the safety valve is connected with a flowmeter, a pressure regulating valve and a stop valve in sequence backwards; the inlet of the stop valve is connected with the outlet of the nitrogen cylinder; and a pressure gauge is installed on the nitrogen cylinder.
The gas component detection unit at least comprises an oxygen measuring instrument, a hydrogen sulfide measuring instrument and a carbon dioxide measuring instrument; the explosion-proof unit is used for detecting whether the personnel operation area contains toxic gases such as hydrogen sulfide; the data processing unit is used for analyzing and judging the data input by the gas component detection unit and the explosion-proof unit, inputting the analysis result into the data storage unit and sending a signal to the execution unit; and the execution unit sends instructions to the electromagnetic valve, the two-position three-way electromagnetic valve and the two-position three-way electromagnetic valve after receiving the signals, and controls the state of the electromagnetic valve.
The vacuum gas collection unit and the nitrogen injection unit can be connected with the tube bundle for use only when the annular space of the non-bonded flexible tube is detected.
The invention has the beneficial effects that: (1) the testing device only completes operation on the platform without water drainage, so that the operation cost is saved; (2) the nitrogen injection unit can conveniently and quickly evaluate the annular space remaining volume of the non-bonded flexible pipe and the sealing performance of the non-bonded flexible pipe; (3) when the non-bonded flexible pipe annulus discharges gas, the components of the discharged gas can be monitored in real time, harmful gas can be effectively prevented from being discharged to the atmosphere, and personal and environmental safety is protected; (4) whether the explosion-proof unit can monitor toxic gas such as hydrogen sulfide and leak among the operation process, if there is the leakage, the device ability self-closing valve, protection operation personnel safety.
Drawings
FIG. 1 is a schematic structural view of an annular space detection and exhaust monitoring device for a non-bonded flexible pipe according to the present invention;
FIG. 2 is a schematic structural diagram of a nitrogen injection unit of the non-bonded flexible pipe annulus detection and exhaust monitoring device of the invention;
FIG. 3 is a schematic view of a non-bonded flexible tube structure;
in the figure: 1. a non-bonded flexible tube; 2. a vacuum gas collection unit; 3. a nitrogen injection unit; 4. a gas component detection unit; 5. a data processing unit; 6. an execution unit; 7. an explosion-proof unit; 8. a data storage unit; 9. the non-bonded flexible pipe is provided with an annular exhaust hole; 10. a thermometer; 11. a pressure gauge; 12. a stop valve; 13. an electromagnetic valve; 14. four-way connection; 15. a stop valve; 16. a stop valve; 17. a check valve; 18. a flow meter; 19. a tee joint; 20. a throttle valve; 21. a pressure reducing valve; 22. a two-position three-way electromagnetic valve; 23. a two-position three-way electromagnetic valve; 24. a stop valve; 25. a gas collection bottle; 26. a tee joint; 27. an exhaust port; 28. a stop valve; 29. a gas collection bottle; 30. a nitrogen gas cylinder; 31. a pressure gauge; 32. an outlet of the nitrogen cylinder; 33. a stop valve; 34. a pressure regulating valve; 35. a flow meter; 36. a safety valve; 37. a framework layer; 38. an internal pressure sealing layer; 39. a compression-resistant armor layer; 40. a wear layer; 41. an inner tensile armor layer; 42. a wear resistant layer; 43. an outer tensile armor layer; 44. and (4) coating the layer.
Detailed description of the invention
As shown in fig. 1-3, a non-adhesive flexible tube annular space detection and exhaust monitoring device mainly comprises a non-adhesive flexible tube 1, a vacuum gas collection unit 2, a nitrogen injection unit 3, a gas component detection unit 4, a data processing unit 5, an execution unit 6, an explosion-proof unit 7, a data storage unit 8, a non-adhesive flexible tube annular space exhaust hole 9, a thermometer 10, a pressure gauge 11, a flowmeter 18, a gas collection bottle 25, an exhaust port 27 and a gas collection bottle 29, and is characterized in that: the non-bonded flexible pipe 1 is provided with a non-bonded flexible pipe annular air exhaust hole 9 communicated with the non-bonded flexible pipe 1 in an annular mode, and the non-bonded flexible pipe annular air exhaust hole 9 is sequentially connected with a thermometer 10, a pressure gauge 11, a stop valve 12, an electromagnetic valve 13 and a four-way valve 14 backwards; one port of the four-way joint 14 is sequentially connected with a stop valve 16 and the vacuum gas collecting unit 2, the other port is sequentially connected with a stop valve 15 and the nitrogen injection unit 3, and the last port is sequentially connected with a check valve 17, a flowmeter 18 and a tee joint 19; one outlet of the tee joint 19 is connected with a two-position three-way electromagnetic valve 22, and the other outlet is sequentially connected with a throttle valve 20, a pressure reducing valve 21, a gas component detection unit 4 and a two-position three-way electromagnetic valve 23; an outlet a of the two-position three-way electromagnetic valve 22 is connected with one inlet of the three-way valve 26, and an outlet b is sequentially connected with a stop valve 28 and a gas collecting bottle 29; the outlet c of the two-position three-way electromagnetic valve 23 is connected with the other inlet of the three-way valve 26, and the outlet d is sequentially connected with the stop valve 24 and the gas collecting bottle 25; the outlet of the tee joint 26 is connected with an exhaust port 27; the signal input end of the data processing unit 5 is electrically connected with the gas component detection unit 4 and the explosion-proof unit 7; the signal output end of the data processing unit 5 is electrically connected with the execution unit 6 and the data storage unit 8.
The nitrogen injection unit 3 comprises a nitrogen gas cylinder 30, a stop valve 33, a pressure regulating valve 34, a flow meter 35 and a safety valve 36; the safety valve outlet 36 is connected with the inlet of the stop valve 15; the inlet of the safety valve 36 is connected with a flow meter 35, a pressure regulating valve 34 and a stop valve 33 in sequence; the inlet of the stop valve 33 is connected with the outlet 32 of the nitrogen cylinder; the nitrogen cylinder 30 is provided with a pressure gauge 31.
A typical non-bonded flexible pipe comprises a carcass layer 37, an inner pressure seal layer 38, a pressure-resistant armor layer 39, a wear layer 40, an inner tensile armor layer 41, a wear layer 42, an outer tensile armor layer 43, an outer cladding 44; an unbonded flexible pipe annulus is formed between the inner pressure seal layer 38 and the overwrap 44.
When the annular gas of the non-bonded flexible pipe 1 needs to be discharged, the annular gas is discharged outwards through the annular gas discharge hole 9 of the non-bonded flexible pipe, the stop valve 12, the electromagnetic valve 13 and the check valve 17 are opened, the stop valve 15 and the stop valve 16 are closed, the annular gas flows through the four-way joint 14 and the three-way joint 19 and then is divided into two paths, a small amount of gas passing through the throttle valve 20 and the pressure reducing valve 21 flows into the gas component detection unit 4, the gas component detection unit 4 at least comprises an oxygen measuring instrument, a hydrogen sulfide measuring instrument and a carbon dioxide measuring instrument to detect the flowing gas, the detection result is input into the data processing unit 5, and the data processing unit 5 inputs the information into the execution unit 6 and the reservoir unit 8. If the detected gas reaches the discharge standard, the execution unit 6 opens the outlet a of the electromagnetic valve 22 and the outlet c of the electromagnetic valve 23, closes the outlet b of the electromagnetic valve 22 and the outlet d of the electromagnetic valve 23, and at the moment, the gas is discharged from the exhaust port 27 through the tee joint 26; if the detected gas does not reach the discharge standard, the execution unit 6 sends a command to open the outlet b of the electromagnetic valve 22 and the outlet d of the electromagnetic valve 23, close the outlet a of the electromagnetic valve 22 and the outlet c of the electromagnetic valve 23, the gas flowing through the outlet b of the electromagnetic valve 22 flows into the gas collecting bottle 29 through the stop valve 28, and the gas flowing through the outlet d of the electromagnetic valve 23 flows into the gas collecting bottle 25 through the stop valve 24, so that the harmful gas is prevented from being discharged into the atmosphere, and the health of people and the surrounding environment are endangered.
When the non-bonded flexible pipe needs to be detected regularly, the check valve 17 is closed, the vacuum gas collection unit 2 is connected, the stop valve 12, the electromagnetic valve 13 and the stop valve 16 are opened, and at the moment, the vacuum gas collection unit 2 collects annular gas with a certain volume and brings the annular gas back to a laboratory for detailed gas component analysis. And after the gas collection is finished, the stop valve 16 is closed, the vacuum gas collection unit 2 is taken out, and the nitrogen injection unit 3 is connected. The stop valve 15, the stop valve 33, the pressure regulating valve 34 and the safety valve 36 are opened, the pressure value of the pressure regulating valve 34 is set, and nitrogen gas with a certain pressure is injected into the annular space of the non-bonded flexible pipe until the annular pressure reaches the set pressure. The flow meter 35 can display the volume of nitrogen injected to calculate the annulus residual volume. The safety valve 36 is used to limit the maximum annular pressure of the unbonded flexible pipe 1 and prevent the unbonded flexible pipe 1 from bursting to fail. If the pressure of the unbonded flexible pipe cannot reach the set pressure value after nitrogen is injected into the annulus, the possibility that the annulus sealing performance is invalid is proved.
The explosion-proof unit 7 is used for detecting whether toxic gases such as hydrogen sulfide are contained in a personnel operation area, if the concentration of harmful gases such as hydrogen sulfide is found to exceed the human body suction standard after detection information is input into the data processing unit 5, an alarm is given, a signal is input into the execution unit 6, the execution unit 6 immediately closes the electromagnetic valve 13, gas is prevented from being continuously leaked, and the health and the surrounding environment of personnel are prevented from being endangered by the harmful gases.
Claims (5)
1. The utility model provides a flexible pipe ring of non-bonding detects and exhaust monitoring devices, mainly by flexible pipe (1), vacuum gas collection unit (2), annotate nitrogen unit (3), gas component detecting element (4), data processing unit (5), execution unit (6), explosion-proof unit (7), data storage unit (8), flexible pipe ring of non-bonding evacuation hole (9), thermometer (10), manometer (11), flowmeter (18), gas cylinder (25), gas vent (27), gas cylinder (29) are constituteed, its characterized in that: the non-bonded flexible pipe (1) is provided with a non-bonded flexible pipe annular air exhaust hole (9) communicated with the non-bonded flexible pipe (1), and the non-bonded flexible pipe annular air exhaust hole (9) is connected with a thermometer (10), a pressure gauge (11), a stop valve (12), an electromagnetic valve (13) and a four-way valve (14) in sequence from back; one port of the four-way joint (14) is sequentially connected with a stop valve (16) and the vacuum gas collection unit (2), the other port of the four-way joint is sequentially connected with a stop valve (15) and the nitrogen injection unit (3), and the last port of the four-way joint is sequentially connected with a check valve (17), a flowmeter (18) and a three-way joint (19); one outlet of the tee joint (19) is connected with a two-position three-way electromagnetic valve (22), and the other outlet is sequentially connected with a throttle valve (20), a pressure reducing valve (21), a gas component detection unit (4) and a two-position three-way electromagnetic valve (23); an outlet a of the two-position three-way electromagnetic valve (22) is connected with one inlet of the three-way valve (26), and an outlet b is sequentially connected with a stop valve (28) and a gas collecting bottle (29); an outlet c of the two-position three-way electromagnetic valve (23) is connected with the other inlet of the three-way valve (26), and an outlet d is sequentially connected with a stop valve (24) and a gas collecting bottle (25); the outlet of the tee joint (26) is connected with an exhaust port (27); the signal input end of the data processing unit (5) is electrically connected with the gas component detection unit (4) and the explosion-proof unit (7); and the signal output end of the data processing unit (5) is electrically connected with the execution unit (6) and the data storage unit (8).
2. A non-bonded flexible pipe annulus detection and exhaust monitoring device according to claim 1, wherein: the vacuum gas collection unit (2) is used for collecting gas in the annular space of the non-bonding flexible pipe (1).
3. A non-bonded flexible pipe annulus detection and exhaust monitoring device according to claim 1, wherein: the nitrogen injection unit (3) comprises a nitrogen cylinder (30), a stop valve (33), a pressure regulating valve (34), a flow meter (35) and a safety valve (36); the outlet of the safety valve (36) is connected with the inlet of the stop valve (15); the inlet of the safety valve (36) is connected with a flowmeter (35), a pressure regulating valve (34) and a stop valve (33) in sequence; the inlet of the stop valve (33) is connected with the outlet (32) of the nitrogen cylinder; and a pressure gauge (31) is arranged on the nitrogen cylinder (30).
4. A non-bonded flexible pipe annulus detection and exhaust monitoring device according to claim 1, wherein: the gas component detection unit (4) at least comprises an oxygen measuring instrument, a hydrogen sulfide measuring instrument and a carbon dioxide measuring instrument; the explosion-proof unit (7) is used for detecting whether the personnel operation area contains toxic gases such as hydrogen sulfide; the data processing unit (5) is used for analyzing and judging data input by the gas component detection unit (4) and the explosion-proof unit (7), inputting an analysis result into the data storage unit (8), and sending a signal to the execution unit (6); and the execution unit (6) sends instructions to the electromagnetic valve (13), the two-position three-way electromagnetic valve (22) and the two-position three-way electromagnetic valve (23) after receiving the signals, and controls the state of the electromagnetic valve.
5. A non-bonded flexible pipe annulus detection and exhaust monitoring device according to claims 1-3, wherein: the vacuum gas collection unit (2) and the nitrogen injection unit (3) can be connected with the tube bundle for use only when detecting the annular space of the non-bonded flexible tube (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210399967.6A CN114689805B (en) | 2022-04-15 | 2022-04-15 | Non-bonding flexible pipe annular space detection and exhaust monitoring device |
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| CN202210399967.6A CN114689805B (en) | 2022-04-15 | 2022-04-15 | Non-bonding flexible pipe annular space detection and exhaust monitoring device |
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| CN114689805B CN114689805B (en) | 2023-09-29 |
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| CN114689805B (en) | 2023-09-29 |
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