CN114689805B - 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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- CN114689805B CN114689805B CN202210399967.6A CN202210399967A CN114689805B CN 114689805 B CN114689805 B CN 114689805B CN 202210399967 A CN202210399967 A CN 202210399967A CN 114689805 B CN114689805 B CN 114689805B
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000012806 monitoring device Methods 0.000 title claims abstract description 8
- 239000007789 gas Substances 0.000 claims abstract description 74
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 64
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000013500 data storage Methods 0.000 claims abstract description 10
- 239000002341 toxic gas Substances 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims description 9
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 8
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 20
- 239000000203 mixture Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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 or the display, e.g. intermittent measurement or digital display
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
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 collecting 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 air vent, a thermometer, a pressure gauge, a gas collecting bottle, a flowmeter and an exhaust port. The device can be divided into a non-bonded 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 exhaust gas in real time and prevent toxic gas from being discharged into the atmosphere; the nitrogen injection part can rapidly and conveniently judge the annular tightness and the annular residual volume of the unbonded flexible pipe. The detection device can complete operation only on the ocean platform, does not need to be drained, has low operation cost, and can effectively provide basis for non-bonding flexible pipe integrity evaluation and residual life analysis.
Description
Technical Field
The invention relates to a device for measuring the annular space state of an unbonded flexible pipe and monitoring the annular exhaust gas composition, in particular to a device for evaluating the annular residual volume of the unbonded flexible pipe and the integrity of the unbonded flexible pipe.
Background
With the continuous development and technical innovation of offshore oil, in recent years, the application of the offshore non-bonded flexible pipe in China is gradually increased and is favored by various oil fields. However, as the service life of the non-bonded flexible pipe increases gradually, the transportation medium is inevitably permeated into the annulus through the internal pressure sealing layer, particularly permeated gas which corrodes various layers of the annulus, and condensed water can appear in the annulus of the non-bonded flexible pipe, which can affect the service performance and service life of the non-bonded flexible pipe. In order to ensure the reliability and integrity of the unbonded flexible pipe, the unbonded flexible pipe has to be inspected, in particular to the annular space state and the annular gas composition of the unbonded flexible pipe, so as to determine the environment of the annular space. However, the marine unbonded flexible pipe is formed by jointly combining metal layers and polymer layers with different structures, the layers are not bonded with each other, a complex unbonded flexible pipe annular space is formed, no complete unbonded flexible pipe annular space detection method is available in China at present, and the prior art is limited to detecting the unbonded flexible pipe outer coating layer by using an ROV.
Therefore, in order to make up for the gap of the domestic marine unbonded flexible pipe annulus detection technology, a device for detecting the state of the annulus space and monitoring the exhaust of the annulus by using a method for injecting nitrogen into the annulus is provided, and a basis is provided for the integrity evaluation and the residual life analysis of the unbonded flexible pipe.
Disclosure of Invention
The purpose of the invention is that: 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 space detection and exhaust monitoring device for the non-bonded flexible pipe is provided, and the annular space residual volume and the integrity of the non-bonded flexible pipe are rapidly and conveniently estimated.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a flexible pipe ring empty detection of non-bonding and exhaust monitoring devices, mainly comprises flexible pipe of non-bonding, vacuum gas collection unit, annotate nitrogen unit, gaseous composition detection unit, data processing unit, execution unit, explosion-proof unit, data storage unit, flexible pipe ring empty exhaust hole of non-bonding, thermometer, manometer, flowmeter, gas collection bottle, gas vent, gas collection bottle, its characterized in that: the non-bonding flexible pipe is provided with a non-bonding flexible pipe annular air vent communicated with the non-bonding flexible pipe annular air, and the non-bonding flexible pipe annular air vent is connected with a thermometer, a first pressure gauge, a first stop valve, an electromagnetic valve and a four-way valve in sequence backwards; one port of the four-way valve is sequentially connected with the third stop valve and the vacuum gas collecting unit, the other port of the four-way valve is sequentially connected with the second stop valve and the nitrogen injection unit, and the last port of the four-way valve is sequentially connected with the check valve, the first flowmeter and the second tee; one outlet of the first tee joint is connected with a first two-position three-way electromagnetic valve, and the other outlet of the first tee joint is sequentially connected with a throttle valve, a pressure reducing valve, a gas component detecting unit and a second two-position three-way electromagnetic valve; the outlet a of the first two-position three-way electromagnetic valve is connected with one inlet of the second three-way valve, and the outlet b is sequentially connected with the fifth stop valve and the second gas collecting bottle; the outlet c of the second two-position three-way electromagnetic valve is connected with the other inlet of the second three-way valve, and the outlet d is sequentially connected with a fourth stop valve and a second gas collecting bottle; the second tee 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; the signal output end of the data processing unit is electrically connected with the execution unit and the data storage unit.
The vacuum gas collecting unit is used for collecting gas in the annular space of the non-bonding flexible pipe.
The nitrogen injection unit comprises a nitrogen cylinder, a sixth stop valve, a pressure regulating valve, a second flowmeter and a safety valve; the safety valve outlet is connected with the second stop valve inlet; the safety valve inlet is connected with a second flowmeter, a pressure regulating valve and a sixth stop valve in sequence backwards; the inlet of the sixth stop valve is connected with the outlet of the nitrogen cylinder; and a second pressure gauge is arranged 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 first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve after receiving the signals and controls the state of the electromagnetic valve.
The vacuum gas collecting unit and the nitrogen injection unit can be connected with the tube bundle for use only when the annular space of the unbonded flexible tube is detected.
The invention has the beneficial effects that: (1) The testing device only completes the operation on the platform, does not need to drain water, and saves the operation cost; (2) The nitrogen injection unit can conveniently and quickly evaluate the annular space volume of the non-bonded flexible pipe and the tightness 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, and the discharge of harmful gas into the atmosphere can be effectively prevented, so that the personal safety and the environmental safety are protected; (4) The explosion-proof unit can monitor whether toxic gas such as hydrogen sulfide leaks in the operation process, and if leakage exists, the device can automatically close the valve to protect the safety of operators.
Drawings
FIG. 1 is a schematic diagram of a non-bonded flexible pipe void-of-loop detection and exhaust monitoring apparatus according to the present invention;
FIG. 2 is a schematic diagram of a nitrogen injection unit of a non-bonded flexible pipe void-of-loop detection and exhaust monitoring device according to the present invention;
FIG. 3 is a schematic illustration of a non-bonded flexible pipe construction;
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. non-adhesive flexible pipe annular air vent holes; 10. a thermometer; 11. a first pressure gauge; 12. a first stop valve; 13. an electromagnetic valve; 14. a four-way joint; 15. a second shut-off valve; 16. a third stop valve; 17. a check valve; 18. a first flowmeter; 19. a first tee; 20. a throttle valve; 21. a pressure reducing valve; 22. a first two-position three-way electromagnetic valve; 23. a second two-position three-way electromagnetic valve; 24. a fourth shut-off valve; 25. a first gas collection bottle; 26. a second tee; 27. an exhaust port; 28. a fifth shut-off valve; 29. a second gas collection bottle; 30. a nitrogen cylinder; 31. a second pressure gauge; 32. a nitrogen cylinder outlet; 33. a sixth shut-off valve; 34. a pressure regulating valve; 35. a second flowmeter; 36. a safety valve; 37. a framework layer; 38. an internal pressure seal layer; 39. a compressive armor layer; 40. a wear-resistant layer; 41. an inner tensile armour layer; 42. a wear-resistant layer; 43. an outer tensile armour layer; 44. and an outer coating layer.
Detailed description of the preferred embodiments
As shown in fig. 1 to 3, a non-bonded flexible pipe annular space detection and exhaust monitoring device mainly comprises a non-bonded flexible pipe 1, a vacuum gas collecting unit 2, a nitrogen injection unit 3, a gas component detection unit 4, a data processing unit 5, an execution unit 6, an explosion prevention unit 7, a data storage unit 8, a non-bonded flexible pipe annular space exhaust hole 9, a thermometer 10, a first pressure gauge 11, a first flowmeter 18, a first gas collecting bottle 25, an exhaust port 27 and a second gas collecting bottle 29, and is characterized in that: the non-bonding flexible pipe 1 is provided with a non-bonding flexible pipe annular air vent hole 9 communicated with the annular space of the non-bonding flexible pipe 1, and the non-bonding flexible pipe annular air vent hole 9 is sequentially connected with a thermometer 10, a first pressure gauge 11, a first stop valve 12, an electromagnetic valve 13 and a four-way valve 14 backwards; one port of the four-way valve 14 is sequentially connected with the third stop valve 16 and the vacuum gas collecting unit 2, the other port is sequentially connected with the second stop valve 15 and the nitrogen injection unit 3, and the last port is sequentially connected with the check valve 17, the first flowmeter 18 and the first tee 19; one outlet of the first tee joint 19 is connected with a first 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 detecting unit 4 and a second two-position three-way electromagnetic valve 23; an outlet a of the first two-position three-way electromagnetic valve 22 is connected with one inlet of the second three-way valve 26, and an outlet b is sequentially connected with a fifth stop valve 28 and a second gas collecting bottle 29; an outlet c of the second two-position three-way electromagnetic valve 23 is connected with the other inlet of the second three-way valve 26, and an outlet d is sequentially connected with the fourth stop valve 24 and the first gas collecting bottle 25; the outlet of the second 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 cylinder 30, a sixth stop valve 33, a pressure regulating valve 34, a second flowmeter 35 and a safety valve 36; the safety valve outlet 36 is connected with the inlet of the second stop valve 15; the inlet of the safety valve 36 is connected with a second flowmeter 35, a pressure regulating valve 34 and a sixth stop valve 33 in turn backwards; the inlet of the sixth stop valve 33 is connected with the nitrogen cylinder outlet 32; the nitrogen cylinder 30 is provided with a second pressure gauge 31.
A typical non-bonded flexible pipe includes a carcass layer 37, an inner pressure containment layer 38, a compressive armor layer 39, a wear layer 40, an inner tensile armor layer 41, a wear layer 42, an outer tensile armor layer 43, and an outer cladding 44; a non-bonded flexible pipe annulus is formed between the inner pressure seal layer 38 and the outer casing 44.
When the annular gas of the unbonded flexible pipe 1 is discharged, the annular gas is discharged outwards through the annular exhaust hole 9 of the unbonded flexible pipe, the first stop valve 12, the electromagnetic valve 13 and the check valve 17 are opened, the second stop valve 15 and the third stop valve 16 are closed, the annular gas is divided into two paths after flowing through the four-way valve 14 and the first three-way valve 19, a small amount of gas flows into the gas component detection unit 4 through the throttle valve 20 and the pressure reducing valve 21, 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 inflow 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 solenoid valve 22 outlet a and the solenoid valve 23 outlet c, closes the solenoid valve 22 outlet b and the solenoid valve 23 outlet d, and the gas is discharged from the gas outlet 27 together through the second tee 26; if the detected gas does not reach the emission standard, the execution unit 6 sends an instruction 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, enable the gas flowing through the outlet b of the electromagnetic valve 22 to flow into the second gas collecting bottle 29 through the fifth stop valve 28, enable the gas flowing through the outlet d of the electromagnetic valve 23 to flow into the first gas collecting bottle 25 through the fourth stop valve 24, and prevent harmful gas from being emitted into the atmosphere, thereby endangering the health of personnel and the surrounding environment.
When the unbonded flexible pipe needs to be detected regularly, the check valve 17 is closed at first, the vacuum gas collecting unit 2 is connected, the first stop valve 12, the electromagnetic valve 13 and the third stop valve 16 are opened, and at the moment, the vacuum gas collecting unit 2 collects annular gas with a certain volume and brings the annular gas back to a laboratory for detailed gas component analysis. After the gas collection is completed, the third stop valve 16 is closed, the vacuum gas collection unit 2 is taken out, and the nitrogen injection unit 3 is connected. The second stop valve 15, the sixth 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 with a certain pressure is injected into the non-bonded flexible pipe annulus until the annulus pressure reaches the set pressure. The second flowmeter 35 can display the injected nitrogen volume to calculate the annulus remaining volume. The relief valve 36 is used to limit the annular maximum pressure of the non-bonded flexible pipe 1 and prevent the non-bonded flexible pipe 1 from burst failure. If the pressure of the unbonded flexible pipe after the annular space is filled with nitrogen cannot reach the set pressure value, the annular space tightness is proved to be possibly invalid.
The explosion-proof unit 7 is used for detecting whether the personnel operation area contains toxic gases such as hydrogen sulfide, if the concentration of the toxic gases such as hydrogen sulfide exceeds the human inhalation standard after the detection information is input into the data processing unit 5, an alarm is sent out, a signal is input into the execution unit 6, the electromagnetic valve 13 is immediately closed by the execution unit 6, the continuous leakage of the gases is avoided, and the harm of the toxic gases to personnel health and surrounding environments is prevented.
Claims (4)
1. The annular space detection and exhaust monitoring device for the non-bonded flexible pipe is characterized by comprising an annular space detection part and an exhaust monitoring part, and mainly comprising a non-bonded flexible pipe (1), a vacuum gas collecting 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), an annular space exhaust hole (9) of the non-bonded flexible pipe, a thermometer (10), a first pressure gauge (11), a first flowmeter (18), a first gas collecting bottle (25), an exhaust port (27) and a second gas collecting bottle (29);
the non-bonding flexible pipe (1) is provided with a non-bonding flexible pipe annular exhaust hole (9) communicated with the annular space of the non-bonding flexible pipe (1), and the non-bonding flexible pipe annular exhaust hole (9) is sequentially connected with a thermometer (10), a first pressure gauge (11), a first stop valve (12), an electromagnetic valve (13) and a four-way valve (14) backwards; one port of the four-way valve (14) is sequentially connected with a third stop valve (16) and the vacuum gas collecting unit (2), the other port is sequentially connected with a second stop valve (15) and the nitrogen injection unit (3), and the last port is sequentially connected with a check valve (17), a first flowmeter (18) and a first tee joint (19); one outlet of the first tee joint (19) is connected with a first 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 detecting unit (4) and a second two-position three-way electromagnetic valve (23); an outlet a of the first two-position three-way electromagnetic valve (22) is connected with one inlet of a second three-way valve (26), and an outlet b is sequentially connected with a fifth stop valve (28) and a second gas collecting bottle (29); an outlet c of the second two-position three-way electromagnetic valve (23) is connected with the other inlet of the second tee joint (26), and an outlet d is sequentially connected with a fourth stop valve (24) and the first gas collecting bottle (25); the outlet of the second 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 data processing unit (5) is used for analyzing and judging the data input by the gas component detection unit (4) and the explosion-proof unit (7), inputting the analysis result into the data storage unit (8) and sending a signal to the execution unit (6); after receiving the signals, the execution unit (6) sends instructions to the electromagnetic valve (13), the first two-position three-way electromagnetic valve (22) and the second two-position three-way electromagnetic valve (23) to control the state of the electromagnetic valve.
2. The non-bonded flexible pipe unit of claim 1, wherein: the nitrogen injection unit (3) comprises a nitrogen cylinder (30), a sixth stop valve (33), a pressure regulating valve (34), a second flowmeter (35) and a safety valve (36); the outlet of the safety valve (36) is connected with the inlet of the second stop valve (15); the inlet of the safety valve (36) is connected with a second flowmeter (35), a pressure regulating valve (34) and a sixth stop valve (33) in sequence backwards; an inlet of the sixth stop valve (33) is connected with a nitrogen cylinder outlet (32); and a second pressure gauge (31) is arranged on the nitrogen cylinder (30).
3. The non-bonded flexible pipe unit of 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 a personnel operation area contains toxic gases such as hydrogen sulfide.
4. The non-bonded flexible pipe unit of claim 1, wherein: the vacuum gas collecting unit (2) and the nitrogen injection unit (3) can be connected with the tube bundle for use only when the annular space of the non-bonded flexible tube (1) is detected.
Priority Applications (1)
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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 true CN114689805B (en) | 2023-09-29 |
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