CN110296324A - A kind of the gas pipe leakage monitoring method and device of adjustable monitoring distance - Google Patents
A kind of the gas pipe leakage monitoring method and device of adjustable monitoring distance Download PDFInfo
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- CN110296324A CN110296324A CN201910649804.7A CN201910649804A CN110296324A CN 110296324 A CN110296324 A CN 110296324A CN 201910649804 A CN201910649804 A CN 201910649804A CN 110296324 A CN110296324 A CN 110296324A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 77
- 230000000704 physical effect Effects 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 238000012806 monitoring device Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 135
- 239000012159 carrier gas Substances 0.000 claims description 30
- 238000004458 analytical method Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 230000003204 osmotic effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000004566 IR spectroscopy Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000008520 organization Effects 0.000 claims description 3
- 238000005183 dynamical system Methods 0.000 description 8
- 238000007689 inspection Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000032258 transport Effects 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to a kind of gas pipe leakage monitoring method of adjustable monitoring distance and devices comprising short distance leakage monitoring mode and long range leakage monitoring mode, both of which are based on gas pipe leakage monitoring device and are operated；Device includes filter element, the outlet end of filter element is connected through air compressor machine and the arrival end of detection pipe, it is connect by the road with mark gas injection unit outlet end positioned at the outlet end of filter element, the outlet end of detection pipe is connect with vacuum pump one end, the other end of vacuum pump is connect through physical property detection unit with mass flow control unit one end, the mass flow control unit other end is connect with gas analyzer one end, and the gas analyzer other end is emptying end.The present invention is able to achieve the interval leakage monitoring to long-distance transport pipes, can apply in gas pipe leakage monitoring technical field extensively.
Description
Technical field
The present invention relates to a kind of gas pipe leakage monitoring technical fields, especially with regard to a kind of adjustable monitoring distance
Gas pipe leakage monitoring method and device.
Background technique
Gas pipe leakage is the major hidden danger of pipe safety operation, and pipeline operation enterprise generally requires periodically to pipe thus
Road carries out inspection.But manual inspection tends not to discovery pipeline minute leakage, and time-consuming and laborious.Wind is runed to reduce pipe safety
Danger, enterprise will be installed leakage monitoring facility often to guarantee pipe safety state.Monitoring based on detection pipe trapping gas leakage
System can identify gas leakage, accuracy with higher and sensitivity.But in the past based on detection pipe trapping leakage
The monitoring system of gas, often uses vacuum pump for power source, and needs to maintain negative pressure state in detection pipe, due to negative pressure power
System pressure difference is about 1bar, and the pipeline distance that can disposably monitor is usually shorter, and long-distance transport pipes, especially grows defeated natural
Gas pipeline, station spacing are unable to reach long distance monitoring target up to 30-40km, negative-pressure type leakage monitoring method.
For example, Publication No. CN 203604997U, CN104359629A, CN102518948B, CN103244833B it is special
Buried pipeline leakage monitoring alarm system disclosed in sharp document is negative-pressure type system.System needs are formed in detection pipe
Negative pressure is monitored leak condition by the way that the detection control structure at detection pipe both ends is arranged in.Currently, disclosed based on inspection
Test tube leakage monitoring system there is no positive pressure type system.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of gas pipe leakage monitoring sides of adjustable monitoring distance
Method and device use positive and negative die mould dynamical system, and two kinds of power modes are integrated in systems, can be adjusted according to monitoring distance
Whole monitoring pattern and power mode, convenient, flexible, maximum monitoring distance is up to 40km.And under different monitoring patterns, spy is set
Fixed leakage recognition mode and station-keeping mode all have good adaptability to long short distance gas pipe leakage.
To achieve the above object, the present invention takes following technical scheme: a kind of gas pipeline of adjustable monitoring distance is let out
Leak monitoring method comprising short distance leakage monitoring mode and long range leakage monitoring mode, both of which are based on flue
Road leakage monitor is operated；Described device includes filter element, air compressor machine, detection pipe, identifies gas injection unit, is true
Empty pump, physical property detection unit, mass flow control unit and gas analyzer；The outlet end of the filter element is through the pneumatics
Machine is connect with the arrival end of the detection pipe, is injected by the road with the mark gas positioned at the outlet end of the filter element single
First outlet end connection, the outlet end of the detection pipe are connect with described vacuum pump one end, described in the other end warp of the vacuum pump
Physical property detection unit is connect with mass flow control unit one end, the mass flow control unit other end and the gas
The connection of body analyzer one end, the gas analyzer other end are emptying end；The short distance leakage monitoring mode are as follows: 1) incited somebody to action
It is connected between filter unit and the emptying end of gas analyzer；Control mark gas injection unit is injected into detection pipe to be preset
The mark gas of amount；2) vacuum pump is opened, by controlling mass flow control unit, makes flow rate of carrier gas in 2m/s or so；Meanwhile
Physical property detection unit, mass flow control unit and gas analyzer start recording data；3) detection pipe extraneous gas passes through expansion
Dissipate enter in detection pipe, carrier gas under vacuum pump pump action, by with gas leakage carrier gas by gas analyzer into
Row detection determines whether leakage occurs by the variable gradient of gas leakage concentration in analysis carrier gas；The long range leakage
Monitoring pattern and short distance leakage monitoring mode operation are consistent, and power unit is changed to air compressor machine；Meanwhile in long distance monitoring
Under mode, using interval monitoring pattern, by controlling the pressure of air compressor machine, control exit velocity is 0.5m/s；Carrier gas is in pneumatics
Under the effect of machine external pressure, the carrier gas with gas leakage is detected by gas analyzer, by leaking gas in analysis carrier gas
The peak value of bulk concentration come determine leakage whether occur.
Further, in the short distance leakage monitoring mode, the method whether leakage occurs is determined are as follows: when gas leakage is dense
Degree variable quantity reaches the triggering leakage alarm lower limit of setting, and leakage alarm occurs；Pass through the relationship of flow velocity and detection time, positioning
Leakage point position to determine monitoring overall length, and is modified leak position by mark gas signal identification.
Further, in the long range leakage monitoring mode, the method whether leakage occurs is determined are as follows: when gas leakage is dense
Degree peak value reaches the triggering leakage alarm lower limit of setting, and leakage alarm occurs；It is let out according to gas physical property and the conservation of mass come inverse
The position of leak source to determine monitoring overall length, and is modified leak position by mark gas signal identification.
A kind of gas pipe leakage monitoring device of adjustable monitoring distance that realizing the above method comprising filtering is single
Member, air compressor machine, detection pipe, mark gas injection unit, vacuum pump, physical property detection unit, mass flow control unit, gas point
Analyzer, programmable controller and industrial PC；The outlet end of the filter element enters through the air compressor machine and the detection pipe
The connection of mouth end, the leakage gas of gas pipeline successively enter the institute for capturing gas leakage through the filter element and air compressor machine
Detection pipe is stated, is connect by the road with mark gas injection unit outlet end positioned at the outlet end of the filter element, it is described
The outlet end of detection pipe is connect with described vacuum pump one end, the other end of the vacuum pump through the physical property detection unit with it is described
The connection of mass flow control unit one end, the mass flow control unit other end are connect with described gas analyzer one end,
The gas analyzer other end is emptying end；The air compressor machine, vacuum pump, physical property detection unit, mass flow control unit
It is electrically connected with the programmable controller with gas analyzer, the programmable controller and the industrial PC carry out information
Interaction.
Further, the detection pipe and the gas pipeline are arranged in parallel, and are located at right above the gas pipeline.
Further, positioned at it is described mark gas injection unit outlet end pipeline on be provided with solenoid valve, the solenoid valve with
The programmable controller electrical connection.
Further, the internal diameter of the detection pipe is 15~20mm, and the detection pipe includes inner standoff layer, intermediate permeable membrane
Layer and external organization level.
Further, the film thickness of the intermediate osmotic membrane layer is 0.4~1mm.
Further, the corresponding detection pipe monitoring mileage of the vacuum pump is less than 15km, the corresponding prison of the air compressor machine
Surveying mileage is greater than 15km range；When the vacuum pump is aspirated as power unit, control inlet vacuum degree be 20~
95kPa, when the air compressor machine pushes carrier gas as power unit, inlet pressure ranges are 0.5~10bar.
Further, the gas analyzer is the gas of laser type sensor, infrared spectroscopy formula sensor or semiconductor-type
Sensor.
The invention adopts the above technical scheme, which has the following advantages: 1, the present invention is by detection pipe arrival end
Air compressor machine and vacuum pump are installed as system dynamic respectively with outlet end, constitute positive/negative-pressure dynamical system, monitored according to detection pipe
Distance selects corresponding leakage monitoring mode, realizes the continuous monitoring pattern of short distance negative pressure and long range positive pressure interval monitoring mould
Formula.2, the present invention realizes the trapping to micro-leakage gas using thin-walled detection pipe.Compensate for simple negative pressure dynamical system monitoring
The shorter defect of distance, increases a monitoring distance range based on detection pipe leakage monitoring system.3, the present invention is to gas
Pipeline can be realized the minute leakage monitoring capability down to several decaliters per hour, can find that different distance pipe leakage or early stage are let out
Leakage.4, single set equipment leakage monitoring distance can be expanded to the left side 40km by the way that distinctive positive/negative-pressure dynamical system is arranged by the present invention
It is right.According to monitoring distance range, operation mode and leakage monitoring algorithm are determined, uninterrupted continuous prison can be carried out for short distance
It surveys, the interval leakage monitoring to long-distance transport pipes can be also able to achieve by the present apparatus.To sum up, the present invention is to prevention pipeline accident, dimension
Shield pipe safety is of great importance, and can apply in gas pipe leakage monitoring technical field extensively.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Specific embodiment
In the description of the present invention, it is to be understood that, the orientation or positional relationship of the instructions such as term "front", "rear" is base
In orientation or positional relationship shown in the drawings, it is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply opposite
Importance.The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention provides a kind of gas pipe leakage monitoring device of adjustable monitoring distance, which can
The pipeline for carrying out leakage monitoring is the gas pipelines such as natural gas, hydrogen, propane, ethylene or chlorine.The present invention includes filter element
1, air compressor machine 2, detection pipe 3, mark gas injection unit 4, vacuum pump 5, physical property detection unit 6, mass flow control unit 7,
Gas analyzer 8, programmable controller 9 and industrial PC 10.
The outlet end of filter element 1 is connect through air compressor machine 2 with the arrival end of detection pipe 3, the leakage gas of gas pipeline 11
Successively enter the detection pipe 3 for capturing gas leakage through filter element 1 and air compressor machine 2, detection pipe 3 is parallel with gas pipeline 11
Arrangement is located at right above gas pipeline 11.It is exported by the road with mark gas injection unit 4 positioned at the outlet end of filter element 1
End connection, the mark gas that mark gas injection unit 4 exports are used to for the carrier gas for entering detection pipe 3 being identified.Detection pipe 3
Outlet end connect with 5 one end of vacuum pump, the other end of vacuum pump 5 is through physical property detection unit 6 and mass flow control unit 7 one
End connection, 7 other end of mass flow control unit are connect with 8 one end of gas analyzer, and 8 other end of gas analyzer is emptying
End；Positive/negative-pressure dynamical system is constituted by air compressor machine 2 and vacuum pump 5, detection pipe 3 is tested by physical property detection unit 6 and flows out carrier gas
The physical property such as pressure, temperature and density.Wherein, air compressor machine 2, vacuum pump 5, physical property detection unit 6,7 and of mass flow control unit
Gas analyzer 8 is electrically connected with programmable controller 9, and programmable controller 9 and industrial PC 10 carry out information exchange；It can compile
Range controller 9 is uploaded to industrial PC after being acquired to primary datas such as the physical property, characteristic gas concentration, flow received
10, industrial PC 10 completes system leak alarm and leakage point according to prepackage carrier gas real-time analyzer and leakage positioning system
Positioning function.
In above-described embodiment, it is provided with solenoid valve on the pipeline of mark 4 outlet end of gas injection unit, the solenoid valve
It is electrically connected with programmable controller 9.
In the various embodiments described above, the internal diameter of detection pipe 3 is 15~20mm, is the composite soft tube of a multilayered structure, the detection
Pipe 3 includes inner standoff layer, intermediate osmotic membrane layer and external organization level.Wherein, the film thickness of intermediate osmotic membrane layer is 0.4~1mm.
The corresponding different monitoring mileage model of air compressor machine 2 and vacuum pump 5 in the various embodiments described above, in positive/negative-pressure dynamical system
It encloses.The corresponding detection pipe of vacuum pump 5 monitors mileage and is less than 15km, and the corresponding monitoring mileage of air compressor machine 2 is greater than 15km range.Very
When sky pump 5 is aspirated as power unit, control inlet vacuum degree is 20~95kPa.Air compressor machine 2 is as power unit to load
When gas is pushed, inlet pressure ranges are 0.5~10bar.
In the various embodiments described above, mass flow control unit 7 includes flow controller and flowmeter, can be carried out to flow
Accurate control, control gas flow rate are generally 0.5~3m/s.
In the various embodiments described above, gas analyzer 8 according to the gas characteristic to be monitored, be chosen as laser type sensor,
The sensitive gas sensor such as infrared spectroscopy formula sensor or semiconductor-type.
In the various embodiments described above, the mark gas identified in gas injection unit 4 should be with gas in the detection pipe 3 that is monitored
Difference, in order to be distinguished to termination signal.
Based on above-mentioned monitoring device, the present invention also provides a kind of gas pipe leakage monitoring sides of adjustable monitoring distance
Method comprising short distance leakage monitoring mode and long range leakage monitoring mode, both of which are based on gas pipe leakage prison
Device is surveyed to be operated.Wherein:
Short distance leakage monitoring mode are as follows:
1) it will be connected between filter element 1 and the emptying end of gas analyzer 8.Control identifies gas injection unit 4 to inspection
The mark gas of injection predetermined amount in test tube 3.
2) vacuum pump 5 is opened, by controlling mass flow control unit 7, makes flow rate of carrier gas in 2m/s or so.Meanwhile object
Property 8 start recording data of detection unit 6, mass flow control unit 7 and gas analyzer, and related data is uploaded to industry control
Machine 11.
3) 3 extraneous gas of detection pipe is by diffusing into detection pipe 3, and carrier gas is under 5 pump action of vacuum pump, by band
There is the carrier gas of gas leakage to be detected by gas analyzer 8, passes through the variable gradient of gas leakage concentration in analysis carrier gas
To determine whether leakage occurs: when gas leakage concentration variable quantity reaches the triggering leakage alarm lower limit of setting, leakage alarm hair
It is raw；By the relationship of flow velocity and detection time, leakage point position is positioned, by mark gas signal identification, to determine that monitoring is total
It is long, and leak position is modified.
Long range leakage monitoring mode are as follows: the operation of long range leakage monitoring mode and short distance leakage monitoring mode operation one
It causes, power unit is changed to air compressor machine 2 by vacuum pump 5.Meanwhile under long distance monitoring mode, using interval monitoring pattern, pass through
The pressure of air compressor machine 2 is controlled, control exit velocity is 0.5m/s.Carrier gas will have gas leakage under the effect of 2 external pressure of air compressor machine
Carrier gas detected by gas analyzer 8, whether leakage is determined by the peak value of gas leakage concentration in analysis carrier gas
Occur.When gas leakage peak concentration reaches the triggering leakage alarm lower limit of setting, leakage alarm occurs.According to gas physical property and
The conservation of mass comes the position of inverse leakage point, by mark gas signal identification, to determine monitoring overall length, and to leak position into
Row amendment.
Wherein, conservation of mass localization method is the physical property state parameter by measuring carrier gas, by the carrier gas of extraction according to same
The isometric inverse distance of quality, determines leakage point position.
In conclusion in the use of the present invention, the selection of monitoring pattern is able to carry out according to detecting distance first.For prison
The case where ranging is from 15km is less than, it is automatic to select vacuum leak monitoring mode, that is, short distance leakage monitoring mode, dynamical system choosing
With vacuum pump 5, continuous monitoring pattern can be used, vacuum pump 5 ceaselessly transports carrier gas, and gas analyzer 8 is to monitoring gas in carrier gas
Body is detected, and when monitoring gas concentration variation has exceeded alarm settings threshold value, triggering leakage alarm is examined according to flow controller
Measurement of discharge data and time relationship determine leakage point position.
After monitoring distance is greater than 15km, system is changed into positive-pressure type leakage monitoring mode i.e. long range leakage monitoring mould
Formula, dynamical system select air compressor machine 2, empty after keeping detection pipe to be in the normal pressure state of certain time interval using intermittent operation
Press 2 starts to start, and maintains preset pressure, maintains 3 rate of discharge of detection pipe to stablize, 8 pairs of leakage gas of gas analyzer
Bulk concentration is detected, and after peak concentration meets or exceeds the alarm threshold value of setting, system issues leakage alarm, passes through physical property
The physical data bond quality conservation of detection unit measurement, positions leakage point.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative, protection scope of the present invention is defined by the appended claims, and those skilled in the art is not
Under the premise of the principle and substance of the present invention, various changes or modifications can be made to these embodiments, but these
Change and modification are fallen within the protection scope of the present invention.
Claims (10)
1. a kind of gas pipe leakage monitoring method of adjustable monitoring distance, which is characterized in that this method includes that short distance is let out
Leakage monitoring pattern and long range leakage monitoring mode, both of which are based on gas pipe leakage monitoring device and are operated；
Described device include filter element, air compressor machine, detection pipe, mark gas injection unit, vacuum pump, physical property detection unit,
Mass flow control unit and gas analyzer；The outlet end of the filter element enters through the air compressor machine and the detection pipe
The connection of mouth end, connect with mark gas injection unit outlet end by the road positioned at the outlet end of the filter element, described
The outlet end of detection pipe is connect with described vacuum pump one end, the other end of the vacuum pump through the physical property detection unit with it is described
The connection of mass flow control unit one end, the mass flow control unit other end are connect with described gas analyzer one end,
The gas analyzer other end is emptying end；
The short distance leakage monitoring mode are as follows:
1) it will be connected between filter element and the emptying end of gas analyzer；Control mark gas injection unit is infused into detection pipe
Enter the mark gas of predetermined amount；
2) vacuum pump is opened, by controlling mass flow control unit, makes flow rate of carrier gas in 2m/s or so；Meanwhile physical property detects
Unit, mass flow control unit and gas analyzer start recording data；
3) for detection pipe extraneous gas by diffusing into detection pipe, carrier gas, will be with leakage under vacuum pump pump action
The carrier gas of gas is detected by gas analyzer, is let out by the variable gradient of gas leakage concentration in analysis carrier gas to determine
Whether leakage occurs；
The long range leakage monitoring mode and short distance leakage monitoring mode operation are consistent, and power unit is changed to pneumatics
Machine；Meanwhile under long distance monitoring mode, exit velocity is controlled by controlling the pressure of air compressor machine using interval monitoring pattern
For 0.5m/s；Carrier gas is detected the carrier gas with gas leakage by gas analyzer under the effect of air compressor machine external pressure, is led to
The peak value of gas leakage concentration in analysis carrier gas is crossed to determine whether leakage occurs.
2. method as described in claim 1, it is characterised in that: in the short distance leakage monitoring mode, determine whether leakage is sent out
Raw method are as follows: when gas leakage concentration variable quantity reaches the triggering leakage alarm lower limit of setting, leakage alarm occurs；Pass through stream
Speed and the relationship of detection time, position leakage point position, by mark gas signal identification, to determine monitoring overall length, and to letting out
Leakage position is modified.
3. method as described in claim 1, it is characterised in that: in the long range leakage monitoring mode, determine whether leakage is sent out
Raw method are as follows: when gas leakage peak concentration reaches the triggering leakage alarm lower limit of setting, leakage alarm occurs；According to gas
Physical property and the conservation of mass come the position of inverse leakage point, by mark gas signal identification, to determine monitoring overall length, and to leakage
Position is modified.
4. a kind of gas pipe leakage monitoring device for the adjustable monitoring distance for realizing method as described in claims 1 to 3,
Be characterized in that: the device includes filter element, air compressor machine, detection pipe, mark gas injection unit, vacuum pump, physical property detection list
Member, mass flow control unit, gas analyzer, programmable controller and industrial PC；
The outlet end of the filter element is connect through the air compressor machine with the arrival end of the detection pipe, the leakage gas of gas pipeline
Body successively enters the detection pipe for capturing gas leakage through the filter element and air compressor machine, is located at the filter element
Outlet end connect by the road with mark gas injection unit outlet end, the outlet end of the detection pipe and the vacuum pump
One end connection, the other end of the vacuum pump are connect through the physical property detection unit with mass flow control unit one end,
The mass flow control unit other end is connect with described gas analyzer one end, and the gas analyzer other end is emptying
End；The air compressor machine, vacuum pump, physical property detection unit, mass flow control unit and gas analyzer may be programmed with described
Controller electrical connection, the programmable controller and the industrial PC carry out information exchange.
5. device as claimed in claim 4, it is characterised in that: the detection pipe and the gas pipeline are arranged in parallel, and are located at institute
It states right above gas pipeline.
6. device as claimed in claim 4, it is characterised in that: set on the pipeline of the mark gas injection unit outlet end
It is equipped with solenoid valve, which is electrically connected with the programmable controller.
7. device as claimed in claim 4, it is characterised in that: the internal diameter of the detection pipe is 15~20mm, the detection pipe packet
Include inner standoff layer, intermediate osmotic membrane layer and external organization level.
8. device as claimed in claim 7, it is characterised in that: the film thickness of the intermediate osmotic membrane layer is 0.4~1mm.
9. device as claimed in claim 4, it is characterised in that: the corresponding detection pipe monitoring mileage of the vacuum pump is less than
15km, the corresponding monitoring mileage of the air compressor machine are greater than 15km range；When the vacuum pump is aspirated as power unit,
Control inlet vacuum degree is 20~95kPa, when the air compressor machine pushes carrier gas as power unit, inlet pressure ranges
For 0.5~10bar.
10. device as claimed in claim 4, it is characterised in that: the gas analyzer is laser type sensor, infrared spectroscopy formula
The gas sensor of sensor or semiconductor-type.
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| CN201910649804.7A CN110296324B (en) | 2019-07-18 | 2019-07-18 | Gas pipeline leakage monitoring method and device capable of adjusting monitoring distance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108244A (en) * | 2021-04-30 | 2021-07-13 | 中海石油气电集团有限责任公司 | Method and system for monitoring and positioning leakage of natural gas pipeline containing hydrogen |
| CN113217824A (en) * | 2021-04-20 | 2021-08-06 | 中国石油大学(华东) | Sulfur-containing natural gas pipeline leakage detection device and method based on parallel pipeline continuous sampling analysis |
| CN114673939A (en) * | 2022-03-15 | 2022-06-28 | 中海石油气电集团有限责任公司 | Detection and positioning method for trace leakage of natural gas |
| CN115389280A (en) * | 2022-10-31 | 2022-11-25 | 北京唯思德科技有限公司 | Gas production device |
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| CN114673939A (en) * | 2022-03-15 | 2022-06-28 | 中海石油气电集团有限责任公司 | Detection and positioning method for trace leakage of natural gas |
| CN114673939B (en) * | 2022-03-15 | 2023-12-19 | 中海石油气电集团有限责任公司 | Detection and positioning method for natural gas micro leakage |
| CN115389280A (en) * | 2022-10-31 | 2022-11-25 | 北京唯思德科技有限公司 | Gas production device |
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