CN104776319A - Multi-path air sampling type online monitoring method and system for fuel gas in inspection well - Google Patents
Multi-path air sampling type online monitoring method and system for fuel gas in inspection well Download PDFInfo
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- CN104776319A CN104776319A CN201510061350.3A CN201510061350A CN104776319A CN 104776319 A CN104776319 A CN 104776319A CN 201510061350 A CN201510061350 A CN 201510061350A CN 104776319 A CN104776319 A CN 104776319A
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Abstract
The invention provides a multi-path air sampling type online monitoring method and system for fuel gas in an inspection well. The method comprises the following steps: a gas collection system is used for collecting gas in the inspection well; a gas treatment system is used for carrying out pre-treatment on the collected gas in the inspection well; a gas testing system is used for monitoring concentration information of the pre-treated gas in the inspection well; a signal collection system is used for collecting concentration information of the gas in the inspection well and generating data information of the gas in the inspection well according to the concentration information; a control center is used for receiving the concentration information of the gas in the inspection well, which is sent by the signal collection system, and judging whether a fuel gas pipeline leaks or not according to the data information of the gas in the inspection well. The multi-path air sampling type online monitoring method for the fuel gas in the inspection well, provided by the invention, can realize real-time monitoring of a leakage condition of fuel gas pipelines in cities.
Description
Technical field
The present invention relates to gas safe technical field, particularly relate to combustion gas on-line monitoring method and system in a kind of multichannel air sampling type inspection shaft.
Background technique
Incity, city gas pipeline major part is arranged in underground, and the surrounding of gas pipeline is soil layer, and when combustion gas leaks out from fuel tube, combustion gas can be diffused in the space of surrounding by soil layer.For the combustion gas diffusion that microscopic crack causes, gas leakage amount is limited, therefore can not form the jet-stream wind of high pressure, and the combustion gas of leakage slowly can be spread through soil layer.If the combustion gas revealed will reach explosion limit, must there is a space makes it build up, and the pipe network that space around gas ductwork is mainly adjacent, such as sewage network, the combustion gas of leakage can be diffused in adjacent sewage network, because current pipeline all adopts well lid to close, isopiestic state is in pipeline, combustion gas to two ends diffusion in pipeline, can arrive well head, builds up and continue to spread forward gradually.
Consider the performance of the complexity that monitoring point is arranged and sensor, if sensor is arranged in-line, difficulty of construction is large, and sensor is easily by water logging, especially in sewage and storm sewer, the maintenance difficulties of sensor is also larger, therefore, usual at present monitoring point to be arranged in inspection shaft.But because inflammable gas in inspection shaft derives from the one hand, organic substance in well rots to produce, mainly methane; Derive from the other hand that gas leakage produces, comprise methane and ethane, therefore, need to monitor methane gas and ethane gas just can determine whether it is have gas pipeline generation gas leakage simultaneously.
The patent No. is disclose a kind of natural gas leaking situation to inspection shaft place in the patent of ZL 200420049717.7 monitor in real time and upload the monitoring system of leakage information, but alarm need be arranged in inspection shaft, because in inspection shaft, itself does not have power supply, cause alarm power supply difficulty and Signal transmissions is difficult, and probably do not had by water logging at heavy rain alarm device, cause alarm to be scrapped.Therefore, when monitoring all gas pipelines, need to power and the problem of Signal transmissions to solve to road dig on a wide area paving line, the very high and very difficult realization of the expense of operation in as installed process.
The patent No. is disclose a kind of aspiration gas detecting system in the patent of ZL 200920252054.1, but this system is not for by the gas ductwork Leak testtion detected based on inspection shaft, do not relate to signal transfer functions, the selection of inspection shaft and the optimization of suction port Placement, cannot form and leak the system of carrying out on-line monitoring compared with burning line in large regions to one.
The patent No. is disclose a kind of inflammable gas multiple spot on-line monitoring system based on wireless sensor network in the patent of ZL 201010587425.9, do not relate in this system and the gas in inspection shaft is sampled, and be the key point of detection system based on how sampling to gas in the gas leakage detection system of inspection shaft.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.
For this reason, first object of the present invention is to propose combustion gas on-line monitoring system in a kind of multichannel air sampling type inspection shaft, and this system can realize the Real-Time Monitoring to gas pipeline leakage situation in city.
Second object of the present invention is to propose combustion gas on-line monitoring method in a kind of multichannel air sampling type inspection shaft.
For reaching above-mentioned purpose, first aspect present invention embodiment proposes combustion gas on-line monitoring system in a kind of multichannel air sampling type inspection shaft, comprising: gas collecting system, and described gas collecting system is for gathering the gas in inspection shaft; Gas handling system, described gas handling system is connected with described gas collecting system, for carrying out pretreatment to the gas in the described inspection shaft gathered; Gas testing systems, described gas testing systems is connected with described gas handling system, for monitoring the concentration information of gas in pretreated inspection shaft; Signal acquiring system, described signal acquiring system is connected with described gas testing systems, for gathering the concentration information of gas in described inspection shaft, and generates the data information of gas in described inspection shaft according to described concentration information; Control centre, described control centre is connected with described signal acquiring system, for receiving the data information of gas in described inspection shaft that described signal acquiring system sends, and judges whether gas pipeline leaks according to the data information of gas in described inspection shaft; And power supply system, described power supply system is connected with described signal acquiring system with described gas handling system, described gas testing systems respectively, for powering for described gas handling system, described gas testing systems and described signal acquiring system.
Combustion gas on-line monitoring system in the multichannel air sampling type inspection shaft of the embodiment of the present invention, gas collecting system is extend in inspection shaft the gas gathered in inspection shaft, through gas handling system, pretreatment is carried out to the gas collected, recycling gas testing systems is tested gas, and by signal acquiring system, the data information of gas is sent to control centre, to make Surveillance center judge whether gas pipeline leaks according to the data information of gas, thus the Real-Time Monitoring to gas pipeline leak case in city can be realized.
For reaching above-mentioned purpose, second aspect present invention embodiment proposes combustion gas on-line monitoring method in a kind of multichannel air sampling type inspection shaft, comprising: the gas in gas collecting system acquisition inspection shaft; Gas handling system carries out pretreatment to the gas in the described inspection shaft gathered; Gas testing systems monitors the concentration information of gas in pretreated inspection shaft; Signal acquiring system gathers the concentration information of gas in described inspection shaft, and generates the data information of gas in described inspection shaft according to described concentration information; And control centre receives the data information of gas in described inspection shaft that described signal acquiring system sends, and judge whether gas pipeline leaks according to the data information of gas in described inspection shaft.
Combustion gas on-line monitoring method in the multichannel air sampling type inspection shaft of the embodiment of the present invention, gas collecting system is extend in inspection shaft the gas gathered in inspection shaft, through gas handling system, pretreatment is carried out to the gas collected, recycling gas testing systems is tested gas, and by signal acquiring system, the data information of gas is sent to control centre, to make Surveillance center judge whether gas pipeline leaks according to the data information of gas, thus the Real-Time Monitoring to gas pipeline leak case in city can be realized.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 be one embodiment of the invention multichannel air sampling type inspection shaft in the structural representation of combustion gas on-line monitoring system;
Fig. 2 be the present invention's specific embodiment multichannel air sampling type inspection shaft in the structural representation of combustion gas on-line monitoring system;
Fig. 3 be one embodiment of the invention multichannel air sampling type inspection shaft in the schematic diagram of installation of combustion gas on-line monitoring system;
Fig. 4 is the flow chart of the inspection shaft selection optimized algorithm of one embodiment of the invention;
Fig. 5 is the flow chart of the suction port Placement optimized algorithm of one embodiment of the invention;
Fig. 6 is the schematic diagram that the suction port parallel connection of one embodiment of the invention gathers;
Fig. 7 is the schematic diagram that the suction port series connection of one embodiment of the invention gathers; And
Fig. 8 be one embodiment of the invention multichannel air sampling type inspection shaft in the flow chart of combustion gas on-line monitoring method.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
Below with reference to the accompanying drawings combustion gas on-line monitoring system and method in multichannel air sampling type inspection shaft according to the embodiment of the present invention described.
Fig. 1 be one embodiment of the invention multichannel air sampling type inspection shaft in the structural representation of combustion gas on-line monitoring system, Fig. 2 be the present invention's specific embodiment multichannel air sampling type inspection shaft in the structural representation of combustion gas on-line monitoring system, Fig. 3 be one embodiment of the invention multichannel air sampling type inspection shaft in the schematic diagram of installation of combustion gas on-line monitoring system, Fig. 4 is the flow chart of the inspection shaft selection optimized algorithm of one embodiment of the invention, Fig. 5 is the flow chart of the suction port Placement optimized algorithm of one embodiment of the invention, Fig. 6 is the schematic diagram that the suction port parallel connection of one embodiment of the invention gathers, Fig. 7 is the schematic diagram that the suction port series connection of one embodiment of the invention gathers.
As depicted in figs. 1 and 2, in this multichannel air sampling type inspection shaft, combustion gas on-line monitoring system comprises gas collecting system 100, gas handling system 200, gas testing systems 300, signal acquiring system 400, control centre 500 and power supply system 600.Wherein, gas collecting system 100 comprises multiple suction port 110 and suction port development unit 120, gas handling system 200 comprises pneumatic filter 210, moisture separator 220, suction pump 230, flow dontroller 240 and exsiccator 250, gas testing systems 300 comprises methane detector 310 and ethane prober 320, and power supply system 600 comprises power supply 610 and electric pressure converter 620.
Particularly, gas collecting system 100 is for gathering the gas in inspection shaft.Wherein, gas collecting system 100 comprises multiple suction port 110 and suction port development unit 120, be connected by pipeline between multiple suction port 110 and suction port development unit 120, and the inlet end of multiple suction port 110 extend in different inspection shafts respectively, for gathering the gas in different inspection shaft.Wherein, gas in inspection shaft comprises the inflammable gas such as methane, ethane, also comprises other gas, suction port 110 is placed in respectively the top of the inspection shaft needing monitoring, and filter screen is set at the inlet end of suction port 110, gather the gas in different inspection shaft by suction port 110.The inlet end of suction port development unit 120 is connected with the outlet side of multiple suction port 110, is delivered to gas handling system 200 for the gas in the different inspection shafts that collected by multiple suction port 110.Wherein, suction port development unit 120 can be arranged in pairs or groups by multiple suction port development unit and be formed, and the quantity of the suction port 110 of each suction port development unit is determined according to demand, and the quantity maximum value of the suction port 110 that suction port development unit 120 connects can reach 100.
Gas handling system 200 is connected with gas collecting system 100, for carrying out pretreatment to the gas in the inspection shaft collected.Wherein, be connected between gas handling system 200 with gas collecting system 100 by pipeline, the gas cleaning plant in gas handling system 200 can be the one in electrodynamic type or mechanical type.
In one embodiment of the invention, gas handling system 200 specifically comprises pneumatic filter 210, moisture separator 220, suction pump 230, flow dontroller 240 and exsiccator 250.Specifically, the inlet end of pneumatic filter 210 is connected by pipeline with the outlet side of suction port development unit 120, pneumatic filter 210 is for the impurity in gas in the inspection shaft that collects gas collecting system 100, such as branch, leaf, particulate matter etc., filter, wherein, pneumatic filter 210 can be the one in mechanical type filter and electrodynamic type filter.The inlet end of moisture separator 220 is connected by pipeline with the outlet side of pneumatic filter 210, moisture separator 220 is for being separated the aqueous vapor in gas in inspection shaft, such as, remove the liquid water in gas in inspection shaft, thus avoid moisture content in gas very high and cause defective detector.The inlet end of suction pump 230 is connected by pipeline with the outlet side of moisture separator 220, and suction pump 230 is electrodynamic type suction pumps, for the gas in inspection shaft is delivered to gas testing systems 300 according to the flow velocity preset.The inlet end of flow dontroller 240 is connected by pipeline with the outlet side of suction pump 230, because the sub-fraction in gas in the inspection shaft that gas testing systems 300 only needs suction pump 230 to carry is to carry out gas test, therefore, the gas flow flowing into gas testing systems 300 can be controlled by flow dontroller 240 is accurate further, wherein, flow dontroller 240 can adopt mechanical flow controller, such as, and valve etc.The inlet end of exsiccator 250 is connected by pipeline with the outlet side of flow dontroller 240, dry silica gel can be filled in exsiccator 250, make from flow dontroller 240 effluent air desiccation after dry silica gel, thus greatly reduce the moisture of gas in inflow gas test system 300.
Gas testing systems 300 is connected with gas handling system 200, for monitoring the concentration information of gas in pretreated inspection shaft.Wherein, can be connected by pipeline between gas testing systems 300 with gas handling system 200.
In one embodiment of the invention, gas testing systems 300 comprises methane detector 310 and ethane prober 320.Specifically, methane detector 310 is for detecting the concentration information of methane in the gas in inspection shaft, and the concentration information of methane is launched by sender unit, wherein, methane detector 310 can include but not limited to the one in electric chemical formula, catalytic combustion type, infrared type, and methane detector 310 is suction detector.The methane concentration value of gas in the inspection shaft that methane detector 310 can detect inflow gas test system 300, methane detector 310 also has sender unit, by sender unit, the methane concentration value detected is sent to signal acquiring system 400, wherein, the data transfer mode between methane detector 310 and signal acquiring system 400 can comprise the one in wire transmission or wireless transmission.
Ethane prober 320 for detecting the concentration information of ethane in gas in inspection shaft, and launches the concentration information of ethane by sender unit.Wherein, ethane prober 320 can include but not limited to the one in electric chemical formula, catalytic combustion type, infrared type, and ethane prober 320 is suction detector.The ethane concentration value of gas in the inspection shaft that ethane prober 320 can detect inflow gas test system 300, ethane prober 320 also has sender unit, by sender unit, the ethane concentration value detected is sent to signal acquiring system 400, wherein, the data transfer mode between ethane prober 320 and signal acquiring system 400 can comprise the one in wire transmission or wireless transmission.
Signal acquiring system 400 is connected with gas testing systems 300, for gathering the concentration information of gas in inspection shaft, and generates the data information of gas in inspection shaft according to concentration information.Specifically, the one in wired connection or wireless connections can be adopted between signal acquiring system 400 and gas testing systems 300, after signal acquiring system 400 collects methane concentration value that methane detector 310 detects and the ethane concentration value that ethane prober 320 detects, the data information of gas in inspection shaft is generated according to methane concentration value and ethane concentration value, wherein, signal acquiring system 400 also has sender unit, by sender unit, the data information of gas in the inspection shaft of generation is sent to control centre 500.
Control centre 500 is connected with signal acquiring system 400, for the data information of gas in the inspection shaft that Received signal strength acquisition system 400 sends, and judges whether gas pipeline leaks according to the data information of gas in inspection shaft.Specifically, the one in wired connection or wireless connections can be adopted between control centre 500 and signal acquiring system 400, methane concentration in the inspection shaft sent in control centre 500 Received signal strength acquisition system 400 and ethane concentration, determine jointly according to methane concentration and ethane concentration whether the source of the gas in inspection shaft is fuel gas pipeline leakage.
Power supply system 600 is connected with signal acquiring system 400 with gas handling system 200, gas testing systems 300 respectively, for powering for gas handling system 200, gas testing systems 300 and signal acquiring system 400.Wherein, power supply system 600 is connected with signal acquiring system 400 with gas handling system 200, gas testing systems 300 respectively by wire.In an embodiment of the invention, power supply system 600 comprises power supply 610 and electric pressure converter 620.Specifically, power supply 610 is for providing electric energy.One end of electric pressure converter 620 is connected with power supply 610, and the other end is connected with signal acquiring system 400 with gas handling system 200, gas testing systems 300 respectively by wire, and the electric energy for being provided by power supply 610 is converted to the electric energy with preset voltage value.That is, the electric energy that power supply 610 provides is converted to the electric energy being applicable to gas handling system 200, gas testing systems 300 and signal acquiring system 400 by electric pressure converter 620.Such as, if power supply 610 provides Ac, Ac can be converted to the direct current of 24V by electric pressure converter 620; Or, if power supply provide 610 be the direct current of 24V, then not needing electric pressure converter 620 to change it, can be directly system power supply.Wherein, electric pressure converter 620 can be connected with signal acquiring system 400 with suction pump 230, methane detector 310, ethane prober 320, respectively for it is powered.
In one embodiment of the invention, power supply 610 is road lamp power supply.Specifically, the power supply system 600 based on road lamp power supply is adopted to power for gas handling system 200, gas testing systems 300 and signal acquiring system 400 in the embodiment of the present invention, because Urban Pipeline Carrying Natural Gas is arranged on the below of urban road, the inspection shaft of road both sides is the object of monitoring, the power supply of illuminating street lamp above road is utilized to power for system, thus make power supply mode simple to operate, and easily realize.
In one embodiment of the invention, on gas handling system 200 and/or gas testing systems 300 inside that is arranged on lamp post or outer wall.Wherein, the arrangement mode of gas handling system 200 and/or gas testing systems 300 comprises the one in word order mode and compact set in arrangement mode, in word order mode, gas handling system 200 and/or gas testing systems 300 are arranged on lamp post inside or outer wall, and in compact set, in arrangement mode, gas handling system 200 and/or gas testing systems 300 are arranged on the outer wall of lamp post.That is, in an embodiment of the present invention, on the inside that gas handling system 200 can be arranged on lamp post or outer wall, or on the inside that gas testing systems 300 can be arranged on lamp post or outer wall, or on the inside that gas handling system 200 and gas testing systems 300 can also be installed in lamp post or outer wall.Thus, gas handling system 200 and/or gas testing systems 300 are arranged on ground lamp post, instead of be arranged in inspection shaft, thus can avoid the methane transducer 310 in gas testing systems 300 and ethane sensor 320 under heavy rain environment because water level in inspection shaft goes up and do not caused damage by water logging, and be beneficial to the Signal transmissions between gas testing systems 300 and signal acquiring system 400.In addition, if adopt Optical Fiber Transmission between gas testing systems 300 and signal acquiring system 400, the engineering work load of then laying optical fiber is laid than in the under ground pipings such as Storm Sewer Network, cable pipe trench, sewage network and is much smaller, if adopt wireless transmission between gas testing systems 300 and signal acquiring system 400, use the base station of wireless carriers, can direct construction transmission network by the wireless transport module of equipment, it is convenient to implement, and difficulty of construction is little.
Such as, as shown in Figure 3, suction pump is arranged on the bottom of lamp post, and gas testing systems is arranged on the top of lamp post, and suction pump and gas testing systems are yi word pattern arrangement, and between pvc pipe by outer surface cover optical fiber communicate.Suction pump stretches in inspection shaft below by the pipeline overlapping pvc pipe, and power supply line utilizes the power supply line of road lamp power supply to be energized to suction pump and gas testing systems.
In an embodiment of the invention, gather the road information in region to be monitored and the distributed intelligence of under ground piping network, and set up GIS data system according to the distributed intelligence of road information and under ground piping network.Which specifically, in gas collecting system 100 for before gathering the gas in inspection shaft, need to select inspection shaft to need monitoring.First, need to collect the segment information that the road information in certain region to be monitored and rain pipe network, fuel tube network, sewage pipe network, cable trunk network, water pipe network, heating pad pipe network etc. are arranged in the managed network of underground, set up GIS (Geographic Information System, geographical information system) data system.
In one embodiment of the invention, the inspection shaft multiple to be monitored in region to be monitored is determined according to inspection shaft selection optimized algorithm.Such as, as shown in Figure 4, first, choose one section of gas pipeline, gas pipeline is divided into n part by the direction along gas pipeline axis, and will the gas pipeline label of n part is divided into be 1,2 successively along axial direction ... n.Then, choose the inspection shaft within 20m around this section of gas pipeline, choose m part gas pipeline, the initial value of m is 1, cross m part axis centre point and do vertical plane, to select perpendicular to axis postive direction side and from nearest 3 inspection shafts of pipe gas pipeline, according to the distance from vertical plane from the close-by examples to those far off by 3 inspection shafts choosing respectively label be t
1, t
2, t
3, and calculate inspection shaft t
1, t
2, t
3distance with this section of burning line, is designated as R by distance respectively
1, R
2, R
3.If R
1=R
2, then R is compared
2with R
3if, R
2< R
3, t
1and t
3number inspection shaft all needs to test, if R
2> R
3, then t
1and t
2number inspection shaft all needs to test, if R
1be not equal to R
2, then R is compared
1with R
2if, R
1< R
2, then t
1number inspection shaft is set to point to be monitored, if R
1> R
2, then t
2number inspection shaft is set to point to be monitored.Then make m=m+1, circulation is compared next time, calculates the point to be monitored that each section of gas pipeline needs to arrange thus successively, until m=n stops calculating.
In an embodiment of the invention, the Placement of the suction port in multiple inspection shaft to be monitored is determined according to suction port Placement optimized algorithm.Such as, as shown in Figure 5-Figure 7, choose the road that a section has the inspection shaft needing monitoring around, inspection shaft is numbered 1 along road direction, 2,3 ... n, selects m and m+1 inspection shaft, the initial value of m is 1, and m < n, calculates m inspection shaft and street lamp place flower bed perpendicular distance is d
m, m+1 inspection shaft and street lamp place flower bed perpendicular distance are d
m+1, m inspection shaft and m+1 inspection shaft distance are d
(m, m+1)if, d
m> d
(m, m+1), and d
m> d
m+1, then m+1 inspection shaft adopts the mode of connecting with the suction port of m inspection shaft, is connected to m well from m+1 well.If d
m> d
(m, m+1), and d
m≤ d
m+1, then m inspection shaft adopts the mode of connecting with the suction port of m+1 inspection shaft, is connected to m+1 well from m well.If d
m≤ d
(m, m+1), No. m adopts mode in parallel with the suction port of m+1 inspection shaft.Then make m=m+1, circulation is compared next time, calculates the point to be monitored that each section of gas pipeline needs to arrange thus successively, until m=n stops calculating.
Combustion gas on-line monitoring system in the multichannel air sampling type inspection shaft that citing below elaborates the embodiment of the present invention.
Embodiment 1
Gas inlet 5 is comprised for combustion gas on-line monitoring system in the multichannel air sampling type inspection shaft of monitoring gas leakage, suction port development unit is a set of, pneumatic filter, mechanical type moisture separator, suction pump, flow dontroller, exsiccator, methane detector, ethane prober, road lamp power supply interface, electric pressure converter, signal picker, control centre, wherein, gas inlet stretches in inspection shaft, one end of suction port is connected with air-breathing funnel, Funnel diameter is less than 10cm, funnel suction port assembling plastic protection net, mesh diameter is less than 2mm, diameter is adopted to be that 15mm combustion gas PE manages and is connected between gas inlet with suction port development unit.Suction port development unit one end adopts diameter to be that 15mm combustion gas PE pipe is connected with mechanical type pneumatic filter, and the other end is connected with the joint distributor of 5 joints, is connected with suction port to obtain 5 air inlet connections.The diameter of mechanical type pneumatic filter is less than 10cm, and the diameter of mechanical type moisture separator is less than 10cm.It is newly the FAA6003 type suction pump that sincere company produces that suction pump adopts, peak velocity is 3L/min, the tee ball valve that mechanical flow controller adopts brilliant valve Co., Ltd of Shanxi section of section to produce, one end of three-way valve is connected with the air outlet of suction pump, the other end diameter is the plastic pipe joint exsiccator of 15mm, gas flow rate controls at 400ml/min, and other one end of three-way valve is connected with a plastic tube, is discharged by unnecessary gas.Exsiccator adopts silica gel drier, and the other end adopts diameter to be that 8mm plastic tube is connected with methane detector.The MOT500-EX type catalytic combustion type methane detector that methane detector adopts Cole's promise company to produce, be equipped with wireless transport module, air outlet adopts diameter to be that 8mm plastic tube is connected with ethane prober.The MOT500-EX type catalytic combustion type ethane prober that ethane prober adopts Cole's promise company to produce, be equipped with wireless transport module, air outlet adopts diameter to be that gas is discharged by 8mm plastic tube.The DN3000 that signal picker adopts Cole's promise company to produce, be equipped with wireless receiving and wireless transport module, wireless transport module by 3G mobile network by Signal transmissions to control centre, road lamp power supply interface is connected with street lamp power supply, road lamp power supply cable, by electric pressure converter, voltage is gone to 24V direct current, electric pressure converter is powered to suction pump, methane detector, ethane prober, signal picker by wire.Pneumatic filter, mechanical type moisture separator, suction pump, flow dontroller, exsiccator, methane detector, ethane prober, road lamp power supply interface, electric pressure converter are arranged in order, be fixed on underframe, then by underframe, these equipment be fixed in lamp post.
Monitoring device mounting point is the inside of lamp post, and one end is connected with the electricity cable in lamppost by wire, and the other end is connected with the power supply system of monitoring device.Sampling pipe is stretched out from sampling development unit, sampling pipe is embedded in 40cm position, underground, one end is stretched in inspection shaft, connect suction port again, the buried construction principle in underground of sampling pipe is that pavement excavation distance is the shortest, lamp post, on flower bed, increases the distance that digging distance on flower bed makes to excavate on road surface the shortest.
Embodiment 2
For combustion gas on-line monitoring system in the multichannel air sampling type inspection shaft of monitoring gas leakage, comprise gas inlet 10, suction port development unit is a set of, pneumatic filter, mechanical type moisture separator, suction pump, flow dontroller, exsiccator, methane detector, ethane prober, road lamp power supply interface, electric pressure converter, signal picker, control centre, wherein one end of gas inlet is connected with air-breathing funnel in inspection shaft, Funnel diameter is less than 10cm, funnel suction port assembling plastic protection net, mesh diameter is less than 2mm, gas inlet adopts diameter to be that 15mm combustion gas PE pipe is connected between suction port development unit.Suction port development unit one end adopts diameter to be that 15mm combustion gas PE pipe is connected with mechanical type pneumatic filter, the other end is connected with the joint distributor of 2 joints, joint distributor 2 interfaces of 2 joints are connected with the joint distributor of 5 joints respectively again, are connected with suction port to obtain 10 air inlet connections.The diameter of mechanical type pneumatic filter is less than 10cm, and the diameter of mechanical type moisture separator is less than 10cm.It is newly the VAK5008 type suction pump that sincere company produces that suction pump adopts, mean velocity is 5L/min, the tee ball valve that mechanical flow controller adopts brilliant valve Co., Ltd of Shanxi section of section to produce, one end of three-way valve is connected with the air outlet of suction pump, the other end diameter is 15mm plastic pipe joint exsiccator, gas flow rate controls at 400ml/min, and the other end of three-way valve is connected with a plastic tube, is discharged by unnecessary gas.Exsiccator adopts silica gel drier, and the other end adopts diameter to be that 8mm plastic tube is connected with methane detector.The MOT500-EX type catalytic combustion type methane detector that methane detector adopts Cole's promise company to produce, be equipped with wireless transport module, air outlet adopts diameter to be that 8mm plastic tube is connected with ethane prober.The MOT500-EX type catalytic combustion type ethane prober that ethane prober adopts Cole's promise company to produce, be equipped with wireless transport module, it is that gas is discharged by 8mm plastic tube that air outlet connects diameter.Signal picker adopts Cole's promise company to produce DN9000, be equipped with wireless receiving and wireless transport module, wireless transport module builds 433MHz wireless network by Signal transmissions to control centre, road lamp power supply interface is connected with street lamp power supply, road lamp power supply cable, by electric pressure converter, voltage is changed into 24V direct current, electric pressure converter is powered to suction pump, methane detector, ethane prober, signal picker by wire.Pneumatic filter, mechanical type moisture separator, suction pump, flow dontroller, exsiccator, methane detector, ethane prober, road lamp power supply interface, electric pressure converter are arranged in order, be fixed on underframe, then by underframe, these equipment be fixed in lamp post.
Monitoring device mounting point is the top of the outside lamppost of lamp post, and one end is connected with the electricity cable in lamppost by wire, and the other end is connected with the power supply system of monitoring device.Sampling pipe is stretched out from sampling development unit, sampling pipe is embedded in 50cm position, underground, one end is stretched in inspection shaft, connect suction port again, the buried construction principle in underground of sampling pipe is that pavement excavation distance is the shortest, lamp post, on flower bed, increases the distance that digging distance on flower bed makes to excavate on road surface the shortest.
Embodiment 3
For combustion gas on-line monitoring system in the multichannel air sampling type inspection shaft of monitoring gas leakage, comprise gas inlet 20, suction port development unit is a set of, pneumatic filter, electric water gas separating device, suction pump, flow dontroller, exsiccator, methane detector, ethane prober, road lamp power supply interface, electric pressure converter, signal picker, control centre, wherein gas inlet stretches in inspection shaft, one end of suction port is connected with air-breathing funnel, Funnel diameter is less than 10cm, funnel suction port assembling plastic protection net, mesh diameter 1mm, adopt 15mm combustion gas PE to manage between gas inlet with suction port development unit to be connected, suction port development unit one end adopts diameter to be that 15mm combustion gas PE pipe is connected with mechanical type pneumatic filter, the other end is connected with the joint distributor of 4 joints, the joint distributor of 4 joints is connected with the joint distributor of 45 joints again, be connected with suction port to obtain 20 air inlet connections.The diameter of mechanical type pneumatic filter is less than 10cm, and the diameter of mechanical type moisture separator is less than 10cm.It is newly the FCY5015 type suction pump that sincere company produces that suction pump adopts, mean velocity is 9L/min, the tee ball valve that mechanical flow controller adopts brilliant valve Co., Ltd of Shanxi section of section to produce, one end of three-way valve is connected with suction pump air outlet, the other end diameter is 15mm plastic pipe joint exsiccator, gas flow rate controls at 400ml/min, and the other end of three-way valve is connected with a plastic tube, is discharged by unnecessary gas.Exsiccator adopts silica gel drier, and the other end adopts diameter to be that 8mm plastic tube is connected with methane detector.The Primax RI infrared type methane detector that methane detector adopts Mei Sian company to produce, be equipped with wired transmission module, air outlet adopts diameter to be that 8mm plastic tube is connected with ethane prober.The Primax RI infrared type ethane prober that ethane prober adopts Mei Sian company to produce, be equipped with wired transmission module, it is that gas is discharged by 8mm plastic tube that air outlet connects diameter.Signal picker adopts Cole's promise company to produce DN3000, and be equipped with cable network reception and wire transmission module, wire transmission module is by Signal transmissions to control centre, and wired connection all adopts Fiber connection; Pneumatic filter, mechanical type moisture separator, suction pump, flow dontroller, exsiccator, methane detector, ethane prober, road lamp power supply interface, electric pressure converter compact arrangement, be fixed on underframe, then by underframe, these equipment be fixed in lamp post.
Monitoring device mounting point is the top of the outside lamppost of lamp post, and one end is connected with the electricity cable in lamppost by wire, and the other end is connected with the power supply system of monitoring device.Sampling pipe is stretched out from sampling development unit, sampling pipe is embedded in 40cm position, underground, one end is stretched in inspection shaft, connect suction port again, the buried construction principle in underground of sampling pipe is that pavement excavation distance is the shortest, lamp post, on flower bed, increases the distance that digging distance on flower bed makes to excavate on road surface the shortest.
Combustion gas on-line monitoring system in the multichannel air sampling type inspection shaft of the embodiment of the present invention, gas collecting system is extend in inspection shaft the gas gathered in inspection shaft, through gas handling system, pretreatment is carried out to the gas collected, recycling gas testing systems is tested gas, and by signal acquiring system, the data information of gas is sent to control centre, to make Surveillance center judge whether gas pipeline leaks according to the data information of gas, thus the Real-Time Monitoring to gas pipeline leak case in city can be realized.
In addition, in the multichannel air sampling type inspection shaft of the embodiment of the present invention, combustion gas on-line monitoring system has the following advantages:
1, utilize the road lamp power supply that throws light on above road to power for monitoring system, power supply mode is simple to operate, is easy to realize;
2, because monitoring system is installed on the ground, according to wire transmission, lay optical fiber than little in the engineering work load of the buried pipe network inner ply fibers such as drain pipe network, cable trunk network, sewage pipe network, according to wireless transmission, use the base station of wireless carriers, equipment can direct construction transmission network by wireless transport module, and it is convenient to implement, and difficulty of construction is little;
3, gas testing systems is arranged on lamp post, avoids sensor device not had by water logging under heavy rain environment and cause damaging, and by gas handling system, the gas sucked is dewatered, make the requirement that the gas entering into gas testing systems reaches dry;
4, suction port is stretched in inspection shaft gather gas, by suction port development unit, monitoring system can be monitored the gas in multiple inspection shaft simultaneously, considerably reduce monitoring cost.
In order to realize above-described embodiment, the present invention also proposes combustion gas on-line monitoring method in a kind of multichannel air sampling type inspection shaft.
Fig. 8 be one embodiment of the invention multichannel air sampling type inspection shaft in the flow chart of combustion gas on-line monitoring method, as shown in Figure 8, in this multichannel air sampling type inspection shaft, combustion gas on-line monitoring method comprises:
S801: the gas in gas collecting system acquisition inspection shaft.
S802: gas handling system carries out pretreatment to the gas in the inspection shaft gathered.
S803: gas testing systems monitors the concentration information of gas in pretreated inspection shaft.
S804: signal acquiring system gathers the concentration information of gas in inspection shaft, and generate the data information of gas in inspection shaft according to concentration information.
S805: the data information of gas in the inspection shaft that control centre's Received signal strength acquisition system sends, and judge whether gas pipeline leaks according to the data information of gas in inspection shaft.
In one embodiment of the invention, the mode between gas testing systems and signal acquiring system and by wireless connections between signal acquiring system and control centre communicates.
In one embodiment of the invention, before gas in gas collecting system acquisition inspection shaft, also comprise: collect the road information in region to be monitored and the distributed intelligence of under ground piping network, and set up GIS data system according to the distributed intelligence of road information and under ground piping network.Wherein, what under ground piping network comprised in rain pipe network, fuel tube network, sewage pipe network, cable trunk network, water pipe network, heating pad pipe network is multiple
In one embodiment of the invention, after setting up GIS data system according to the distributed intelligence of road information and under ground piping network, also comprise: determine the inspection shaft multiple to be monitored in region to be monitored according to inspection shaft selection optimized algorithm.
In one embodiment of the invention, after determining the inspection shaft multiple to be monitored in territory, prison to be treated according to inspection shaft selection optimized algorithm, also comprise: the Placement determining the suction port in multiple inspection shaft to be monitored according to suction port Placement optimized algorithm.
Combustion gas on-line monitoring method in the multichannel air sampling type inspection shaft of the embodiment of the present invention, gas collecting system is extend in inspection shaft the gas gathered in inspection shaft, through gas handling system, pretreatment is carried out to the gas collected, recycling gas testing systems is tested gas, and by signal acquiring system, the data information of gas is sent to control centre, to make Surveillance center judge whether gas pipeline leaks according to the data information of gas, thus the Real-Time Monitoring to gas pipeline leak case in city can be realized.
It should be noted that, in the multichannel air sampling type inspection shaft of the embodiment of the present invention, in the specific implementation of combustion gas on-line monitoring method and the multichannel air sampling type inspection shaft of the embodiment of the present invention, the specific implementation of combustion gas on-line monitoring system part is similar, specifically refer to the description of components of system as directed, in order to reduce redundancy, do not repeat herein.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logical function to data-signal, there is the specific integrated circuit of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", etc. term should be interpreted broadly, such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (17)
1. a combustion gas on-line monitoring system in multichannel air sampling type inspection shaft, is characterized in that, comprising:
Gas collecting system, described gas collecting system is for gathering the gas in inspection shaft;
Gas handling system, described gas handling system is connected with described gas collecting system, for carrying out pretreatment to the gas in the described inspection shaft gathered;
Gas testing systems, described gas testing systems is connected with described gas handling system, for monitoring the concentration information of gas in pretreated inspection shaft;
Signal acquiring system, described signal acquiring system is connected with described gas testing systems, for gathering the concentration information of gas in described inspection shaft, and generates the data information of gas in described inspection shaft according to described concentration information;
Control centre, described control centre is connected with described signal acquiring system, for receiving the data information of gas in described inspection shaft that described signal acquiring system sends, and judges whether gas pipeline leaks according to the data information of gas in described inspection shaft; And
Power supply system, described power supply system is connected with described signal acquiring system with described gas handling system, described gas testing systems respectively, for powering for described gas handling system, described gas testing systems and described signal acquiring system.
2. monitoring system as claimed in claim 1, it is characterized in that, described gas collecting system specifically comprises:
Multiple suction port, one end of described multiple suction port stretches in different inspection shaft respectively, and described multiple suction port is for gathering the gas in described different inspection shaft; And
Suction port development unit, one end of described suction port development unit is connected with the other end of described multiple suction port, for the gas in the described different inspection shaft of described multiple suction port collection is delivered to described gas handling system.
3. monitoring system as claimed in claim 2, it is characterized in that, described gas handling system specifically comprises:
Pneumatic filter, one end of described pneumatic filter is connected with the other end of described suction port development unit, for filtering the impurity in the gas in described inspection shaft;
Moisture separator, one end of described moisture separator is connected with the other end of described pneumatic filter, for being separated the aqueous vapor in the gas in described inspection shaft;
Suction pump, one end of described suction pump is connected with described moisture separator;
Flow dontroller, described flow dontroller is connected with the other end of described suction pump, for controlling the flow of the gas flowing into described gas testing systems; And
Exsiccator, one end of described exsiccator is connected with the other end of described flow dontroller, for carrying out drying to the gas in described inspection shaft.
4. monitoring system as claimed in claim 3, it is characterized in that, described gas testing systems specifically comprises:
Methane detector, described methane detector for detecting the concentration information of methane in the gas in described inspection shaft, and launches the concentration information of described methane by sender unit; And
Ethane prober, described ethane prober for detecting the concentration information of ethane in the gas in described inspection shaft, and launches the concentration information of described ethane by sender unit.
5. monitoring system as claimed in claim 4, it is characterized in that, described methane detector and/or described ethane prober comprise the one in electric chemical formula, catalytic combustion type, infrared type prober.
6. monitoring system as claimed in claim 5, it is characterized in that, described methane detector and/or described ethane prober are suction detector.
7. monitoring system as claimed in claim 1, it is characterized in that, described power supply system specifically comprises:
Power supply, for providing electric energy;
Electric pressure converter, described electric pressure converter is connected with described power supply, and the electric energy for being provided by described power supply is converted to the electric energy with preset voltage value.
8. monitoring system as claimed in claim 7, it is characterized in that, described power supply is road lamp power supply.
9. monitoring system as claimed in claim 8, is characterized in that, on the inside that described gas handling system and/or described gas testing systems are arranged on lamp post or outer wall.
10. monitoring system as claimed in claim 9, it is characterized in that, the arrangement mode of described gas handling system and/or described gas testing systems comprises the one in word order mode and compact set in arrangement mode, be arranged on described lamp post inside or outer wall at gas handling system and/or described gas testing systems described in described word order mode, in described compact set, gas handling system described in arrangement mode and/or described gas testing systems are arranged on the outer wall of described lamp post.
11. monitoring systems as claimed in claim 1, it is characterized in that, the mode between described gas testing systems and described signal acquiring system and by wireless connections between described signal acquiring system and described control centre communicates.
Combustion gas on-line monitoring method in 12. 1 kinds of multichannel air sampling type inspection shafts, is characterized in that, comprising:
Gas in gas collecting system acquisition inspection shaft;
Gas handling system carries out pretreatment to the gas in the described inspection shaft gathered;
Gas testing systems monitors the concentration information of gas in pretreated inspection shaft;
Signal acquiring system gathers the concentration information of gas in described inspection shaft, and generates the data information of gas in described inspection shaft according to described concentration information; And
Control centre receives the data information of gas in described inspection shaft that described signal acquiring system sends, and judges whether gas pipeline leaks according to the data information of gas in described inspection shaft.
13. monitoring methods as claimed in claim 12, it is characterized in that, the mode between described gas testing systems and described signal acquiring system and by wireless connections between described signal acquiring system and described control centre communicates.
14. monitoring methods as claimed in claim 12, it is characterized in that, before gas in gas collecting system acquisition inspection shaft, also comprise: gather the road information in region to be monitored and the distributed intelligence of under ground piping network, and set up GIS data system according to the distributed intelligence of described road information and under ground piping network.
15. monitoring methods as claimed in claim 14, is characterized in that, it is multiple that described under ground piping network comprises in rain pipe network, fuel tube network, sewage pipe network, cable trunk network, water pipe network, heating pad pipe network.
16. monitoring methods as claimed in claim 14, is characterized in that, after setting up GIS data system according to the distributed intelligence of described road information and under ground piping network, also comprise:
The inspection shaft multiple to be monitored in described region to be monitored is determined according to inspection shaft selection optimized algorithm.
17. monitoring methods as claimed in claim 16, is characterized in that, after determining the inspection shaft multiple to be monitored in described region to be monitored according to inspection shaft selection optimized algorithm, also comprise:
The Placement of the suction port in described multiple inspection shaft to be monitored is determined according to suction port Placement optimized algorithm.
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