CN107121312A - A kind of gas pipeline automatic sampling device and automatic sampling method - Google Patents
A kind of gas pipeline automatic sampling device and automatic sampling method Download PDFInfo
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- CN107121312A CN107121312A CN201710296466.4A CN201710296466A CN107121312A CN 107121312 A CN107121312 A CN 107121312A CN 201710296466 A CN201710296466 A CN 201710296466A CN 107121312 A CN107121312 A CN 107121312A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
Abstract
Return to main line, the first safety valve, the 3rd safety valve, the 4th safety valve, safety relief pipeline, sample gas the invention discloses a kind of gas pipeline automatic sampling device, including sampling main line, at least one sampling slip, sampling slip header, sampling return header, manual sampling line, safety relief header, power gas source pipeline, sample gas and return to header, release branch road and sampling controller.Present invention also offers a kind of gas pipeline automatic sampling method.Beneficial effects of the present invention are：The representative sample of natural gas in pipeline can automatically and continuously be gathered out；It is lost in, is all reflected in sample gas with the change for ensuring any composition of natural gas without any component in sampling process, accurately reflects pipeline gas transmission correspondence component and calorific value；It is accurate to be reliable and easy to install；Do not need extra source of the gas to supply, power is used as by the use of the natural gas in pipeline.
Description
Technical field
The present invention relates to pipe-line system technical field, in particular to a kind of gas pipeline automatic sampling device and certainly
Dynamic sampling method.
Background technology
For long distance gas pipeline, especially cross-border natural gas line is to the accurate analysis for conveying natural gas quality
Ensure objectively and fairly inspection and quarantine, it is ensured that the economic interests of trade both sides and the vital factor of the safe operation of pipeline.
For makings in addition to detection and analysis in real time is carried out using online analyzer, off-line analysis also no less important is carried out to natural gas,
By on-line automatic sampler, representative gas is gathered, is laboratory, Entry-Exit Inspection and Quarantine Bureau or third party inspection
Reliable basis are provided.
Tradition sampling is intended only as accessory system and used, it is considered to artificial operation requirement, will be straight after pipeline sample gas high pressure relief
Deposit steel cylinder is connect, then is manually detected the sample gas in steel cylinder.The shortcoming of such a sampler is：
1st, due to decompression and heat-absorbing action in sampling process, gas component change is lost in, it is impossible to represent actual real traffic,
Obtaining sample may be under-represented；
2nd, it is not provided with sampling control system, it is impossible to realize to sampling system equipment state, power conditions, sampling loop stream
Speed, the monitoring of sampling frequency；
3rd, flow measurement is not carried out to sampling loop, whether air-flow in sampling loop can not be normally judged；Unrealized stream
Amount control, it is impossible to realize that sampling loop flow follows main pipeline changes in flow rate；
4th, hand-operated sampling device is not provided with, the system failure can not be sampled；
5th, back-up circuit is not provided with, system easily produces failure；
6th, sampling container safety relief facility is not provided with, sample is also easy to produce and overflows peril；
7th, pressure instrumentation is not provided with, lacks the monitoring to loop process parameter；
8th, the automatic sampling time can not be set；
9th, it can not realize that sample gas is reclaimed.
The content of the invention
To solve the above problems, it is an object of the invention to provide a kind of gas pipeline automatic sampling device and automatic sampling
Method, directly can automatically and continuously gather out the representative sample of natural gas in pipeline, be completed by sampling controller
The sample collection of scheduled volume, and its sampling control signal can be sent to upper-level control system, can be dry in no operating personnel
It is continuous and repeatedly extract a small amount of sample in the case of pre-, sample is all reflected to the change for ensuring any composition of natural gas
In, provide foundation for the medium analysis of production process.
The invention provides a kind of gas pipeline automatic sampling device, including：
Sample main line, at least one sampling slip, sampling slip header, sampling return header, manual sampling line, peace
Full header of releasing, power gas source pipeline, sample gas return to main line, the first safety valve, the 3rd safety valve, the 4th safety valve, safety
Release pipeline, sample gas return header, release branch road and sampling controller；
The sampling main line arrival end is connected with gas pipeline, the sampling main line port of export and the sampling slip
Header arrival end is connected, and the sampling slip header port of export returns to header arrival end, the sample gas with the sample gas and returns to master
Line entry end is connected, and the sample gas returns to the main line port of export and is connected with the gas pipeline, and the sample gas returns to header and gone out
Mouth end returns to header arrival end with the sampling and is connected, and the sampling returns to the header port of export and described first safety valve one end connects
Connect, the first safety valve other end is connected with the safety relief line entry end, the safety relief tube outlet end with
The safety relief header arrival end connection, the safety relief header port of export is connected with residual gas bottle, the residual gas bottle and resistance
Firearm connect, the manual sampling line arrival end with it is described sampling main line be connected, the manual sampling line port of export and
The safety relief header arrival end connection；
Sampling probe, first instrument valve, first pressure table are set gradually on the sampling main line, the sampling probe is inserted
Enter in the gas pipeline and take gas；
Second instrument valve, the 3rd gauge valve are set gradually on the sampling slip header；
The sampling returns and sets gradually the 7th gauge valve, the first check valve on header；
The power gas source line entry end with it is described sampling the main line port of export be connected, on the power gas source pipeline according to
Secondary setting filter, the first pressure-reducing valve, the 4th pressure gauge；
The sample gas returns and sets gradually the 3rd check valve, the 9th gauge valve on main line, and the 9th gauge valve passes through
Pipeline is connected to the gas pipeline；
The manual sampling line arrival end is connected on the pipeline of the sampling main line after the first pressure table,
The 14th gauge valve, the second pressure-reducing valve, the 5th pressure gauge, the 15th gauge valve, are set gradually on the manual sampling line
16 gauge valves, sample gas cylinder, the 17th gauge valve, the 18th gauge valve；
The sampling slip arrival end is connected on the pipeline between the second instrument valve and the 3rd gauge valve, institute
State on the pipeline that the sampling slip port of export is connected between first check valve and first safety valve, the sampling slip
On set gradually magnetic valve, sampling pump, the tenth gauge valve, mobile piston gas cylinder, the 13rd gauge valve, the mobile piston gas cylinder
Two ends top sets second pressure table, the 3rd pressure gauge respectively, and the mobile piston gas cylinder two ends bottom is connected by pipeline respectively
Connect and limit switch is set on the 11st gauge valve, the 12nd gauge valve, the mobile piston gas cylinder, the 11st gauge valve,
12nd gauge valve is connected to the branch road of releasing by pipeline respectively, and the branch road of releasing is connected to the 18th instrument
On pipeline between table valve and residual gas bottle, the limit switch passes through the first limit switch cable connection to automatic sampling control
Device processed, the magnetic valve connects the automatic sampling controller, the power gas source tube outlet by the first solenoid cable
End is connected with the magnetic valve；
Described 3rd safety valve one end is connected on the pipeline of the power gas source pipeline after the 4th pressure gauge, institute
On the pipeline for stating the safety relief header that the 3rd safety valve other end is connected to after the 18th gauge valve；
Described 4th safety valve one end is connected on the pipeline of the sampling slip header before the second instrument valve, institute
On the pipeline for stating the safety relief header that the 4th safety valve other end is connected to after the 18th gauge valve.
Improved as of the invention further, in addition to it is at least one standby sampling slip, standby sampling slip header, standby
Header, standby branch road of releasing, the second safety valve, back-up safety are returned to sampling to release pipeline；
The sampling main line port of export is connected with the standby sampling slip header arrival end, the standby sampling slip
The header port of export returns to header arrival end, sample gas return main line arrival end with the sample gas and is connected, and the sample gas is returned
The header port of export returns to header arrival end with the standby sampling and be connected, and the standby sampling returns to the header port of export and described the
Two safety valve one end are connected, and the second safety valve other end and the back-up safety pipeline arrival end of releasing are connected, described standby
Be connected with safety relief tube outlet end with the safety relief header arrival end, the safety relief header port of export with it is described
Residual gas bottle connection；
The 4th gauge valve, the 5th gauge valve are set gradually on the standby sampling slip header；
The 8th gauge valve, the second check valve are set gradually on the standby branch road of releasing；
The standby sampling slip arrival end is connected to the pipeline between the 4th gauge valve and the 5th gauge valve
On, the standby sampling slip port of export is connected on the pipeline between second check valve and second safety valve, institute
State and standby magnetic valve, standby sampling pump, standby tenth gauge valve, spare moving piston gas are set gradually on standby sampling slip
Bottle, standby 13rd gauge valve, the spare moving piston gas cylinder two ends top sets standby second pressure table, standby the respectively
Three pressure gauges, the spare moving piston gas cylinder two ends bottom connects standby 11st gauge valve, standby by pipeline respectively
Standby limit switch is set on 12 gauge valves, the spare moving piston gas cylinder, it is standby 11st gauge valve, described standby
Standby branch road of releasing is connected to by pipeline respectively with the 12nd gauge valve, the standby branch road of releasing is connected to the described 18th
On pipeline between gauge valve and residual gas bottle, the standby limit switch is by the second limit switch cable connection to described
Automatic sampling controller, the standby magnetic valve is connected to the automatic sampling controller by the second solenoid cable, described
Power gas source tube outlet end is connected with the standby magnetic valve.
As further improvement of the invention, in addition to sampling switching pipeline, described sampling switching pipeline one end is connected to
On pipeline between the second instrument valve and the 3rd gauge valve, the sampling switching pipeline other end is connected to described the
On pipeline between four gauge valves and the 5th gauge valve, the 6th gauge valve is set on the sampling switching pipeline.
As further improvement of the invention, the sampling slip header arrival end is connected to the filter and the hand
On pipeline between dynamic sampling line arrival end.
As further improvement of the invention, the second standby sampling slip header arrival end is connected to the filter
On pipeline between the manual sampling line arrival end.
Present invention also offers a kind of gas pipeline automatic sampling method, this method comprises the following steps：
Step 1, the condition of automatic sampling controller setting sampling or cycle；
Step 2, sampling probe inserts in the gas pipeline and takes natural gas from the gas pipeline, passes through the sampling
Natural gas is introduced the sampling main line by the gas vent of probe；Meanwhile, the first pressure table detection sampling supervisor
The natural gas of superpressure is introduced after safety relief header by the 4th safety valve on pressure on road, the sampling main line enters residual
Gas cylinder；
Step 3, the natural gas after pressure detecting enters sampling slip header, and natural gas is entered by the sampling slip header
Enter in each sampling slip；
Step 4, the natural gas on sampling main line after filter, the filtering decompression of the first pressure-reducing valve by being used as control sampling
The source of the gas of the magnetic valve of pump start and stop；Meanwhile, the pressure on the 4th pressure gauge detection power gas source pipeline, the power gas source pipeline
The natural gas of upper superpressure is introduced after the safety relief header by the 3rd safety valve enters residual gas bottle；
Step 5, for each sampling slip, according to the sampling condition of setting or cycle, the automatic sampling controller leads to
The natural gas crossed on the first solenoid cable control opens solenoid valve, each sampling slip of the sampling pump start-up operation collection,
And send into the sample collected in mobile piston gas cylinder；
Second pressure table, the 3rd pressure gauge on the mobile piston gas cylinder two ends top detect the mobile piston gas cylinder
Pressure, when the mobile piston gas cylinder 80% is full of, the automatic sampling controller is controlled by the first limit switch cable
Limit switch action on sample cylinder on the mobile piston gas cylinder, sampling process is automatically stopped；Meanwhile, it is described to take automatically
Sample controller receives the gas flow signals of each sampling slip by the first solenoid cable；
The 11st gauge valve that is set by the mobile piston gas cylinder two ends bottom, the 12nd gauge valve are by the movement
Remaining natural gas in piston gas cylinder introduces branch road of releasing, and remnants are naturally introduced the safety relief header by multiple branch roads of releasing
Enter residual gas bottle afterwards；
Natural introduce of remnants on sampling slip is sampled return header by the port of export of multiple sampling slips, passes through the first peace
Full valve, which naturally introduces remnants after the safety relief header, enters residual gas bottle；
Step 6, enter the sampling after the natural return headers into sample gas of remnants on the sampling slip header to return
Header, remnants are naturally introduced after the safety relief header enter residual gas bottle by the first safety valve；Meanwhile, the sample
The natural gas that gas is returned in header enters sample gas and returns to the return interface for entering sampling probe after main line, by the natural gas of extraction
Return in the gas pipeline, natural gas discharge atm number in reduction probe tube.
As further improvement of the invention, when sampling slip maintenance can not work, open standby sampling slip and carry out
Sampling, step 2~step 6 is replaced with：
Step 2, sampling probe inserts in the gas pipeline and takes natural gas from the gas pipeline, passes through the sampling
Natural gas is introduced the sampling main line by the gas vent of probe；Meanwhile, the first pressure table detection sampling supervisor
The natural gas of superpressure is introduced after safety relief header by the 4th safety valve on pressure on road, the sampling main line enters residual
Gas cylinder；
Step 3, the natural gas after pressure detecting enters standby sampling slip header, and natural gas passes through the standby sampling branch
Road header enters in each standby sampling slip；
Step 4, the natural gas on sampling main line is standby by being used as control after filter, the filtering decompression of the first pressure-reducing valve
The source of the gas of the standby magnetic valve of sampling pump start and stop；Meanwhile, the pressure on the 4th pressure gauge detection power gas source pipeline, the power
The natural gas of superpressure is introduced after the safety relief header by the 3rd safety valve on source of the gas pipeline enters residual gas bottle；
Step 5, for each standby sampling slip, according to the sampling condition of setting or cycle, the automatic sampling control
Device opens standby magnetic valve by the control of the second solenoid cable, and the standby sampling pump, which is started working, gathers each standby sampling
Natural gas on branch road, and the sample collected is sent into spare moving piston gas cylinder；
The standby second pressure table on the spare moving piston gas cylinder two ends top, the detection of standby 3rd pressure gauge are described standby
With the pressure of mobile piston gas cylinder, when the spare moving piston gas cylinder 80% is full of, the automatic sampling controller passes through
Second limit switch cable controls the standby limit switch action on the sample cylinder on the spare moving piston gas cylinder, sampling
Process is automatically stopped；Meanwhile, the automatic sampling controller receives each standby sampling slip by the second solenoid cable
Gas flow signals；
Pass through standby 11st gauge valve of spare moving piston gas cylinder two ends bottom setting, standby 12nd instrument
Remaining natural gas in the spare moving piston gas cylinder is introduced standby branch road of releasing by valve, and multiple standby branch roads of releasing are by remnants
Naturally introduce after the safety relief header and enter residual gas bottle；
Remnants on standby sampling slip are naturally introduced standby sampling and returned by the port of export of multiple standby sampling slips to converge
Pipe, remnants are naturally introduced after the safety relief header enter residual gas bottle by the second safety valve；
Step 6, the natural sample gas that enters of remnants on the standby sampling slip header is returned after header into described standby
Sampling returns to header, naturally introduces after the safety relief header remnants by the second safety valve and enters residual gas bottle；Together
When, the natural gas that the sample gas is returned in header enters sample gas and returns to the return interface for entering sampling probe after main line, will draw
The natural gas gone out is returned in the gas pipeline, natural gas discharge atm number in reduction probe tube.
As further improvement of the invention, in addition to sampling switching pipeline, switching pipeline by the sampling will sample
Branch road is switched to standby sampling slip and is sampled.
Improve, when sampling slip and standby sampling slip are overhauled when can not work, open as of the invention further
Manual sampling line is sampled；The gas pipeline automatic sampling method is replaced with：
Sampling probe inserts in the gas pipeline and takes natural gas from the gas pipeline, passes through the sampling probe
Natural gas is introduced the sampling main line by gas vent, and natural gas reaches manual sampling line by the sampling main line；
Natural gas on the manual sampling line enters sample gas cylinder after being depressurized by the second pressure-reducing valve；
Meanwhile, the first pressure table detects superpressure on the pressure on the sampling main line, the sampling main line
Natural gas is introduced after safety relief header by the 4th safety valve enters residual gas bottle；5th pressure gauge detects the manual probe tube
Pressure on road, the natural gas of the manual sampling line superpressure, which is introduced after the safety relief header, enters residual gas bottle；
Remaining natural gas on the sampling main line enters after entering sampling slip header or standby sampling slip header
Sampling returns to header or standby sampling returns to header, and remnants are naturally introduced into the peace by the first safety valve or the second safety valve
Enter residual gas bottle after full header of releasing；
Meanwhile, the natural gas that the sample gas is returned in header enters sample gas and returns to the return for entering sampling probe after main line
Interface, the natural gas of extraction is returned in the gas pipeline, natural gas discharge atm number in reduction probe tube.
As further improvement of the invention, the gas flow signals of each sampling slip and each standby sampling slip lead to
Cross in the automatic sampling controller feeding yard control system.
Beneficial effects of the present invention are：
1st, it is lost in sampling process without any component, sample gas is all reflected to the change for ensuring any composition of natural gas
In, accurately reflect pipeline gas transmission correspondence component and calorific value；
The 2nd, sampling controller is set, the representative sample of natural gas in pipeline, Ke Yishi is automatically and continuously gathered out
Now to sampling system equipment state, power conditions, sampling loop flow velocity, sampling frequency monitoring；
3rd, flow measurement can be carried out to sampling loop, air-flow in sampling loop is judged, flow control is realized, it is real
Existing sampling loop flow follows main pipeline changes in flow rate；
The 4th, manual sampling line is set, can be sampled in the system failure；
The 5th, back-up circuit is set, and system can continue continuous automatic sampling when producing failure；
The 6th, sampling container safety relief pipeline is set, it is to avoid the peril that sample overflows；
The 7th, pressure instrumentation is set, loop process parameter can be monitored；
8th, the automatic sampling time can be set by sampling controller；
9th, realize that sample gas is reclaimed by the setting of residual gas bottle；
10th, sampling pump uses pneumatic type sampling pump, extracts representative sample from pipeline using on-line sampling device
Into sample cylinder, it is not necessary to extra source of the gas supply, by the use of the natural gas in pipeline as power, with self cleaning system
By sample room, it is ensured that each sampling period can obtain a real representational sample；
11st, simple in construction, maintenance cost is low.
Brief description of the drawings
Fig. 1 is a kind of structural representation of gas pipeline automatic sampling device described in the embodiment of the present invention；
Fig. 2 is a kind of schematic flow sheet of gas pipeline automatic sampling method described in the embodiment of the present invention.
In figure,
1st, sampling probe；2nd, first instrument valve；3rd, first pressure table；4th, second instrument valve；5th, the 3rd gauge valve；6th, the 4th
Gauge valve；7th, the 5th gauge valve；8th, the 6th gauge valve；9th, the 7th gauge valve；10th, the 8th gauge valve；11st, the first check valve；12、
Second check valve；13rd, the 3rd check valve；14th, the 9th gauge valve；15A, magnetic valve；16A, sampling pump；17A, the tenth gauge valve；
18A, mobile piston gas cylinder；19A, the 11st gauge valve；20A, the 12nd gauge valve；21A, the 13rd gauge valve；22A, second
Pressure gauge；23A, the 3rd pressure gauge；24A, limit switch；15B, standby magnetic valve；16B, standby sampling pump；17B, the standby tenth
Gauge valve；18B, spare moving piston gas cylinder；19B, standby 11st gauge valve；20B, standby 12nd gauge valve；It is 21B, standby
With the 13rd gauge valve；22B, standby second pressure table；23B, standby 3rd pressure gauge；24B, standby limit switch；25th, first
Safety valve；26th, the second safety valve；27th, the 3rd safety valve；28th, the 4th safety valve；29th, filter；30th, the first pressure-reducing valve；31、
4th pressure gauge；32nd, the 14th gauge valve；33rd, the second pressure-reducing valve；34th, the 5th pressure gauge；35th, the 15th gauge valve；36th,
16 gauge valves；37th, sample gas cylinder；38th, the 17th gauge valve；39th, the 18th gauge valve；40th, residual gas bottle；41st, spark arrester；
42nd, standby sampling slip；43rd, main line is sampled；44th, sampling slip；45th, the first sampling slip header；46th, the second sampling slip
Header；47th, the first sampling returns to header；48th, the second sampling returns to header；49th, sample gas returns to main line；50th, sampling switching pipe
Road；51st, power gas source pipeline；52nd, the first safety relief pipeline；53rd, the second safety relief pipeline；54th, manual sampling line；
55th, automatic sampling controller；56th, sample gas returns to header；57th, first release branch road；58th, second release branch road；59th, safety relief
Header；60th, the first limit switch cable；61st, the first solenoid cable；62nd, the second limit switch cable；63rd, the second magnetic valve
Cable.
Embodiment
The present invention is described in further detail below by specific embodiment and with reference to accompanying drawing.
Embodiment 1, as shown in figure 1, a kind of gas pipeline automatic sampling device of the embodiment of the present invention, including：
Sample main line 43, three sampling slips 44, sampling slip header 45, samplings and return to header 47, manual probe tube
Road 54, safety relief header 59, power gas source pipeline 51, sample gas return to main line 49, the first safety valve 25, the 3rd safety valve
27th, the 4th safety valve 28, safety relief pipeline 52, sample gas return to header 56, release branch road 57 and sampling controller 55；
The sampling arrival end of main line 43 is connected with gas pipeline, and the sampling port of export of main line 43 enters with sampling slip header 45
Mouth end connection, the port of export of sampling slip header 45 returns to the arrival end of header 56, sample gas with sample gas and returns to the arrival end of main line 49 company
Connect, sample gas returns to the port of export of main line 49 and is connected with gas pipeline, sample gas returns to the port of export of header 56 and returns to header 47 with sampling
Arrival end is connected, and sampling returns to the port of export of header 47 and is connected with the one end of the first safety valve 25, the other end of the first safety valve 25 and peace
The full arrival end of pipeline 52 connection of releasing, the port of export of safety relief pipeline 52 is connected with the arrival end of safety relief header 59, let out safely
Put the port of export of header 59 to be connected with residual gas bottle 40, residual gas bottle 40 is connected with spark arrester 41, and the manual arrival end of sampling line 54 is with taking
Sample main line 43 is connected, and the manual port of export of sampling line 54 is connected with the arrival end of safety relief header 59；
Sampling probe 1, first instrument valve 2, first pressure table 3 are set gradually on sampling main line 43, sampling probe 1 is inserted
Gas is taken in gas pipeline；
Second instrument valve 4, the 3rd gauge valve 5 are set gradually on sampling slip header 45；
Sampling returns and sets gradually the 7th gauge valve 9, the first check valve 11 on header 47；
The arrival end of power gas source pipeline 51 is connected with the sampling port of export of main line 43, is set gradually on power gas source pipeline 51
Filter 29, the first pressure-reducing valve 30, the 4th pressure gauge 31；
Sample gas returns and sets gradually the 3rd check valve 13, the 9th gauge valve 14 on main line 49, and the 9th gauge valve 14 passes through
Pipeline is connected to gas pipeline；
The manual arrival end of sampling line 54 is connected on the pipeline of the sampling main line 43 after first pressure table 3, is taken manually
The 14th gauge valve 32, the second pressure-reducing valve 33, the 5th pressure gauge 34, the 15th gauge valve 35, are set gradually on sample pipeline 54
16 gauge valves 36, sample gas cylinder 37, the 17th gauge valve 38, the 18th gauge valve 39；
Three arrival ends of sampling slip 44 are both connected on the pipeline between the gauge valve 5 of second instrument valve 4 and the 3rd, three
The port of export of sampling slip 44 is both connected on the pipeline between the first check valve 11 and the first safety valve 25, each sampling slip 44
On set gradually magnetic valve 15A, sampling pump 16A, the tenth gauge valve 17A, mobile piston gas cylinder 18A, the 13rd gauge valve 21A,
Mobile piston gas cylinder 18A two ends top sets second pressure table 22A, the 3rd pressure gauge 23A, mobile piston gas cylinder 18A two respectively
Hold bottom to be connected respectively by pipeline and limit is set on the 11st gauge valve 19A, the 12nd gauge valve 20A, mobile piston gas cylinder 18A
Bit switch 24A, the 11st gauge valve 19A, the 12nd gauge valve 20A are connected to branch road 57 of releasing by pipeline respectively, branch of releasing
Road 57 is connected on the pipeline between the 18th gauge valve 39 and residual gas bottle 40, and limit switch 24A passes through the first limit switch electricity
Cable 60 is connected to automatic sampling controller 55, and magnetic valve 15A connects automatic sampling controller 55 by the first solenoid cable 61,
The port of export of power gas source pipeline 51 is connected with magnetic valve 15A；
The one end of 3rd safety valve 27 is connected on the pipeline of the power gas source pipeline 51 after the 4th pressure gauge 31, the 3rd safety
The other end of valve 27 is connected on the pipeline of the safety relief header 59 after the 18th gauge valve 39；
The one end of 4th safety valve 28 is connected on the pipeline of the sampling slip header 45 before second instrument valve 4, the 4th safety
The other end of valve 28 is connected on the pipeline of the safety relief header 59 after the 18th gauge valve 39.
Further, the present invention is also provided with back-up circuit, it is ensured that system can continue continuously to adopt automatically when producing failure
Sample.Setting also includes at least one standby sampling slip 42, standby sampling slip header 46, standby sampling and returns to header 48, standby
Released pipeline 53 with branch road 58 of releasing, the second safety valve 26, back-up safety；
The sampling port of export of main line 43 is connected with three standby arrival ends of sampling slip header 46, three standby sampling slips
The port of export of header 46 returns to the arrival end of header 56, the sample gas return arrival end of main line 49 with sample gas and is connected, and sample gas returns to header 56
The port of export returns to the arrival end of header 48 with standby sampling and is connected, and standby sampling returns to the port of export of header 48 and the second safety valve 26 1
End connection, the other end of the second safety valve 26 and the back-up safety arrival end of pipeline 53 of releasing is connected, and back-up safety pipeline 53 of releasing goes out
Mouth end is connected with the arrival end of safety relief header 59, and the port of export of safety relief header 59 is connected with residual gas bottle 40；
The 4th gauge valve 6, the 5th gauge valve 7 are set gradually on standby sampling slip header 46；
The 8th gauge valve 10, the second check valve 12 are set gradually on standby branch road 58 of releasing；
Three standby arrival ends of sampling slip 42 are both connected on the pipeline between the 4th gauge valve 6 and the 5th gauge valve 7,
Three standby ports of export of sampling slip 42 are both connected on the pipeline between the second check valve 12 and the second safety valve 26, standby to take
Standby magnetic valve 15B, standby sampling pump 16B, standby tenth gauge valve 17B, spare moving piston are set gradually on sample branch road 42
Gas cylinder 18B, standby 13rd gauge valve 21B, spare moving piston gas cylinder 18B two ends top sets standby second pressure table respectively
22B, standby 3rd pressure gauge 23B, spare moving piston gas cylinder 18B two ends bottom connect standby 11st instrument by pipeline respectively
Standby limit switch 24B, the standby tenth are set on table valve 19B, standby 12nd gauge valve 20B, spare moving piston gas cylinder 18B
One gauge valve 19B, standby 12nd gauge valve 20B are connected to standby branch road 58 of releasing, standby branch road of releasing by pipeline respectively
58 are connected on the pipeline between the 18th gauge valve 39 and residual gas bottle 40, and standby limit switch 24B passes through the second limit switch
Cable 63 is connected to automatic sampling controller 55, and standby magnetic valve 15B is connected to automatic sampling by the second solenoid cable 62
Controller 55, the port of export of power gas source pipeline 51 is connected with standby magnetic valve 15B.
Further, in order to realize the switching between sampling slip and standby sampling slip, in addition to sampling switching pipeline
50, sampling switching pipeline 50 one end is connected on the pipeline between the gauge valve 5 of second instrument valve 4 and the 3rd, sampling switching pipeline
50 other ends are connected on the pipeline between the 4th gauge valve 6 and the 5th gauge valve 7, and the 6th instrument is set on sampling switching pipeline 50
Table valve 8.The switching between sampling slip and standby sampling slip is realized by the switch of the 6th gauge valve 8.
Wherein, the arrival end of sampling slip header 45 is connected to the pipe between filter 29 and the arrival end of manual sampling line 54
On line.The second standby arrival end of sampling slip header 46 is connected to the pipe between filter 29 and the arrival end of manual sampling line 54
On line.
Wherein, the structure of sampling probe 1 is insertion/withdrawal type, by being inserted after a supporting flange form whole-through diameter ball valve
In gas pipeline, when have wiper by or maintenance when, yard and pipeline are without stopping transportation, and operator can be safely from pressure
Sampling probe is removed or inserted in pipeline, realizes probe easily in OIR.Sampling probe 1 is provided with gas vent and returns
Tieback mouthful, returns to the natural gas of extraction in gas pipeline that there is provided gas circulation loop, realization pipeline by returning to interface
In natural gas to provide the source of the gas of back pressure system, and the natural gas of extraction is returned to by another interface of sampling probe
In natural gas main pipeline, natural gas discharge atm number in reduction probe tube.
Standby sampling pump 16B on sampling pump 16A and standby sampling slip on sampling slip samples for Pneumatic diaphragm
Pump, power is the high-pressure natural gas in pipeline, and natural gas is by filtering the magnetic valve after decompression as control sampling pump start and stop
Source of the gas.Meanwhile, sampling pump can be in different pipes under gas pressure, and successfully being extracted from the high-pressure natural gas of flowing has generation
The sample of table is to constant pressure sample cylinder (mobile piston gas cylinder).
Mobile piston gas cylinder 18A and spare moving piston gas cylinder 18B is to be shown on piston type, gas cylinder equipped with magnetic indicator
Capacity.Natural gas in sampling reach piston gas cylinder needs using pipeline makes its pressure and pipeline pressure to its advance pressurising
Power is consistent, and back pressure system is provided for gas cylinder.Back pressure source of the gas will be popped one's head in by on-line period in a probe by the day in pipeline
Right gas is drawn out to mobile piston gas cylinder back pressure interface.Magnetic switch is set at the volume of cylinder 80%, for controlling in cylinder
Tolerance.
Sampling controller 55 can be controlled to sampling process, it is ensured that system automatically presses flow proportional or time scale
Periodic sampling is carried out, when mobile piston gas cylinder 80% is full of, the limit switch action on sample gas cylinder, sampling process is stopped automatically
Only.Sampling controller energy receiving pipeline gas flow signals, determine sampling pump electromagnetic valve switch frequency, finally by uninterrupted
Sampling frequency is controlled, also temporally ratio sampling frequency can be directly set.Flow signal can be 4mA~20mADC signals or height
Frequency pulse signal.Controller carries explosion-proof liquid crystal touch screen, can live setup parameter.
Sampling controller can be communicated with upper-level control system, and taking for the correlations such as each road sampling completion can be provided to host computer
Sample information.Communication interface should be RS485Modbus RTU.Automatic sampling controller 55 is connected with yard control system, for follow-up
Analysis management.
Manual sampling loop and sample gas cylinder, the collection of uninterrupted sample during for automatic sampling maintenance of equipment.
Safety valve is set in sampling system pipeline, natural gas is discharged when system overpressure, it is ensured that system safety.Sampling system
Discharge pipe, when equipment needs repairing, natural gas in discharge conduit are set.These gas collections are interior to residual gas bottle, final row
Amplify gas or carry out safe handling.
According to environment temperature and medium temperature, in order to prevent ambient temperature influence from making have lime set shape in sampling line
Into, it is ensured that sampling equipment can normally be run, and the pipeline and equipment of sampling system are according to circumstances incubated and heat tracing accordingly, are taken
The heating-up temperature of sample pipeline should be at least above 10 DEG C of condensation temperature.
The wiring of all instrument and electrical equipment should be connected respectively to the explosion proof instrument and electric power for being located at and adapting to site environment
Junction box in.
The present apparatus gathers most representational sample gas at the place of entering the station that trade both sides join to steel out of operation pipeline
Bottle, periodically delivers to the departments such as laboratory and inspection and quarantining for import/export by steel cylinder and carries out analytical test.
The sampling probe of the present invention is arranged on pipeline, and directly can automatically and continuously gather out natural gas in pipeline has
Representational sample, the sample collection of scheduled volume is completed by sampling controller, and can be sent to its sampling control signal
Level controlling system.The present apparatus can be continuous in the case where no operating personnel intervene and repeatedly extracts a small amount of sample, with true
The change for protecting any composition of natural gas is all reflected in sample, and foundation is provided for the medium analysis of production process.
The present invention can automatically and continuously gather out the representative sample of natural gas in pipeline.Nothing in sampling process
Any component is lost in, and is all reflected in sample gas with the change for ensuring any composition of natural gas, accurately reflects pipeline gas transmission correspondence
Component and calorific value.The present apparatus has low-down maintenance requirement, is accurately reliable and easy to install.Sampling pump is sampled using pneumatic type
Pump, representative sample is extracted into sample cylinder using on-line sampling device from pipeline, it is not necessary to which extra source of the gas is supplied
Should, by the use of the natural gas in pipeline as power, with self cleaning system by sample room, it is ensured that each sampling period can
Obtain a real representational sample.
Embodiment 2, as shown in Fig. 2 a kind of gas pipeline automatic sampling method of the present invention, this method includes following step
Suddenly：
Step 1, the condition of the setting of automatic sampling controller 55 sampling or cycle；
Step 2, natural gas is taken from gas pipeline in the insertion of sampling probe 1 gas pipeline, passes through the gas of sampling probe 1
Natural gas is introduced sampling main line 43 by outlet, and natural gas enters three after reaching sampling slip header 45 through over sampling main line 43
In individual sampling slip 44；Meanwhile, the pressure on the detection sampling main line 43 of first pressure table 3 samples superpressure on main line 43
Natural gas is introduced after safety relief header 59 by the 4th safety valve 28 enters residual gas bottle 40；
Step 3, the natural gas after pressure detecting enters sampling slip header 45, and natural gas is entered by sampling slip header 45
Enter in three sampling slips 44；
Step 4, the natural gas on sampling main line 43 after filter 29, the filtering decompression of the first pressure-reducing valve 30 by being used as control
The magnetic valve 15A of sampling pump 16A start and stop processed source of the gas；Meanwhile, the pressure on the 4th pressure gauge 31 detection power gas source pipeline 51,
The natural gas of superpressure is introduced after safety relief header 59 by the 3rd safety valve 27 on power gas source pipeline 51 enters residual gas bottle 40；
Step 5, for each sampling slip 44, according to the sampling condition of setting or cycle, automatic sampling controller 55 leads to
Cross the first solenoid cable 61 control opens solenoid valve 15A, the day that sampling pump 16A starts working on each sampling slip 44 of collection
Right gas, and the sample collected is sent into mobile piston gas cylinder 18A；
The mobile piston gas cylinder of second pressure table 22A, the 3rd pressure gauge 23A detection on mobile piston gas cylinder 18A two ends top
18A pressure, when mobile piston gas cylinder 18A80% is full of, automatic sampling controller 55 passes through the first limit switch cable 60
The limit switch on sample cylinder on the mobile piston gas cylinder 18A of control
24A is acted, and sampling process is automatically stopped；Meanwhile, automatic sampling controller 55 is connect by the first solenoid cable 61
Receive the gas flow signals of each sampling slip 44；
The 11st gauge valve 19A, the 12nd gauge valve 20A set by mobile piston gas cylinder 18A two ends bottom will be moved
Remaining natural gas in piston gas cylinder 18A introduces branch road 57 of releasing, and multiple branch roads 57 of releasing let out the remaining natural safety that introduces
Put and enter residual gas bottle 40 after header 59；
The port of export of three sampling slips 44, which respectively returns to the natural introducing samplings of remnants on respective sampling slip 44, to converge
Pipe 47, enters residual gas bottle 40 by the first safety valve 25 by remaining natural introduce after safety relief header 59；
Step 6, enter sampling after the natural return headers 56 into sample gas of remnants on sampling slip header 45 and return to header
47, remaining natural introduce after safety relief header 59 is entered by residual gas bottle 40 by the first safety valve 25；Meanwhile, sample gas, which is returned, to converge
Natural gas in pipe 56 enters sample gas and returns to the return interface for entering sampling probe 1 after main line 49, and the natural gas of extraction is returned
Return in gas pipeline, natural gas discharge atm number in reduction probe tube.
Embodiment 3, difference from Example 2 is, when the maintenance of sampling slip 44 can not work, opens standby sampling
Branch road 42 is sampled, and step 2~step 6 is replaced with：
Step 2, natural gas is taken from gas pipeline in the insertion of sampling probe 1 gas pipeline, passes through the gas of sampling probe 1
Natural gas is introduced sampling main line 43 by outlet, and it is laggard that natural gas reaches standby sampling slip header 46 through over sampling main line 43
Enter in three standby sampling slips 42；Meanwhile, the pressure on the detection sampling main line 43 of first pressure table 3 samples main line 43
The natural gas of upper superpressure is introduced after safety relief header 59 by the 4th safety valve 28 enters residual gas bottle 40；
Step 3, sampling slip 44 is switched into standby sampling slip 42 by sampling switching pipeline 50 to be sampled, pressure
Natural gas after detection enters standby sampling slip header 46, and it is standby that natural gas enters each by standby sampling slip header 46
In sampling slip 42；
Step 4, the natural gas on sampling main line 43 after filter 29, the filtering decompression of the first pressure-reducing valve 30 by being used as control
Prepare the source of the gas of the standby magnetic valve 15B with sampling pump 16B start and stop；Meanwhile, the 4th pressure gauge 31 detection power gas source pipeline 51
On pressure, the natural gas of superpressure enters after introducing safety relief header 59 by the 3rd safety valve 27 on power gas source pipeline 51
Residual gas bottle 40；
Step 5, for each standby sampling slip 42, according to the sampling condition of setting or cycle, automatic sampling controller
55 open standby magnetic valve 15B by the control of the second solenoid cable 62, and standby sampling pump 16B, which starts working, gathers each standby
Natural gas on sampling slip 42, and the sample collected is sent into spare moving piston gas cylinder 18B；
Standby second pressure table 22A, standby 3rd pressure gauge the 23A detection on spare moving piston gas cylinder 18B two ends top
Spare moving piston gas cylinder 18B pressure, when spare moving piston gas cylinder 18B80% is full of, automatic sampling controller 55 leads to
The standby limit switch 24B crossed on the sample cylinder on the second limit switch cable 63 control spare moving piston gas cylinder 18B is moved
Make, sampling process is automatically stopped；Meanwhile, automatic sampling controller 55 receives each standby sampling by the second solenoid cable 62
The gas flow signals of branch road 42；
Standby 11st gauge valve 19B, standby 12nd instrument set by spare moving piston gas cylinder 18B two ends bottom
Remaining natural gas in spare moving piston gas cylinder 18B is introduced standby branch road 58 of releasing, multiple standby branch roads of releasing by table valve 20B
Remaining natural introduce after safety relief header 59 is entered residual gas bottle 40 by 58；
Remnants on respective standby sampling slip 42 are naturally introduced standby by the port of export of three standby sampling slips 42 respectively
Header 48 is returned with sampling, remaining natural introduce after safety relief header 59 is entered by residual gas bottle 40 by the second safety valve 26；
Step 6, the natural sample gas that enters of remnants on standby sampling slip header 46 is returned after header 56 into standby sampling
Header 48 is returned, remaining natural introduce after safety relief header 59 is entered by residual gas bottle 40 by the second safety valve 26；Meanwhile, sample
The natural gas that gas is returned in header 56 enters sample gas and returns to the return interface for entering sampling probe 1 after main line 49, by extraction
Natural gas is returned in gas pipeline, natural gas discharge atm number in reduction probe tube.
Embodiment 4, is with embodiment 2 and the difference of embodiment 3, when sampling slip 44 and standby sampling slip 42 are equal
When maintenance can not work, open manual sampling line 54 and be sampled；Gas pipeline automatic sampling method is replaced with：
Natural gas is taken from gas pipeline in the insertion gas pipeline of sampling probe 1, will by the gas vent of sampling probe 1
Natural gas introduces sampling main line 43, and natural gas reaches manual sampling line 54 through over sampling main line 43；
Natural gas on manual sampling line 54 enters sample gas cylinder 37 after being depressurized by the second pressure-reducing valve 33；
Meanwhile, the pressure on the detection sampling main line 43 of first pressure table 3, the natural gas for sampling superpressure on main line 43 leads to
Cross the 4th safety valve 28 and introduce after safety relief header 59 and enter residual gas bottle 40；5th pressure gauge 34 detects manual sampling line 54
On pressure, the natural gas of the manual superpressure of sampling line 54, which is introduced after safety relief header 59, enters residual gas bottle 40；
The remaining natural gas sampled on main line 43 is laggard into sampling slip header 45 or standby sampling slip header 46
Enter sampling and return to header 47 or standby sampling return header 48, will be remaining natural by the first safety valve 25 or the second safety valve 26
Introduce after safety relief header 59 and enter residual gas bottle 40；
Meanwhile, the natural gas that sample gas is returned in header 56 enters sample gas and returns to returning into sampling probe 1 after main line 49
Tieback mouthful, the natural gas of extraction is returned in gas pipeline, natural gas discharge atm number in reduction probe tube.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of gas pipeline automatic sampling device, it is characterised in that including：
Sample main line (43), at least one sampling slip (44), sampling slip header (45), sampling return header (47), hand
Dynamic sampling line (54), safety relief header (59), power gas source pipeline (51), sample gas return to main line (49), the first safety
Valve (25), the 3rd safety valve (27), the 4th safety valve (28), safety relief pipeline (52), sample gas return to header (56), branch of releasing
Road (57) and sampling controller (55)；
Described sampling main line (43) arrival end is connected with gas pipeline, sampling main line (43) port of export and the sampling
Branch road header (45) arrival end is connected, and sampling slip header (45) port of export returns to header (56) entrance with the sample gas
End, the sample gas return to the connection of main line (49) arrival end, and the sample gas returns to main line (49) port of export and the appendix
Road is connected, and the sample gas returns to header (56) port of export and is connected with described sampling return header (47) arrival end, and the sampling is returned
Return header (47) port of export to be connected with described first safety valve (25) one end, the first safety valve (25) other end and the peace
The full connection of pipeline (52) arrival end, safety relief pipeline (52) port of export and safety relief header (59) entrance of releasing
End connection, safety relief header (59) port of export is connected with residual gas bottle (40), the residual gas bottle (40) and spark arrester (41)
Connection, manual sampling line (54) arrival end is connected with the sampling main line (43), the manual sampling line (54)
The port of export is connected with safety relief header (59) arrival end；
Sampling probe (1), first instrument valve (2), first pressure table (3) are set gradually on the sampling main line (43), it is described
Sampling probe (1) inserts in the gas pipeline and takes gas；
Second instrument valve (4), the 3rd gauge valve (5) are set gradually on the sampling slip header (45)；
The sampling returns and sets gradually the 7th gauge valve (9), the first check valve (11) on header (47)；
Power gas source pipeline (51) arrival end is connected with described sampling main line (43) port of export, the power gas source pipeline
(51) filter (29), the first pressure-reducing valve (30), the 4th pressure gauge (31) are set gradually on；
The sample gas returns and sets gradually the 3rd check valve (13), the 9th gauge valve (14), the 9th instrument on main line (49)
Table valve (14) is connected to the gas pipeline by pipeline；
Manual sampling line (54) arrival end is connected to the sampling main line (43) after the first pressure table (3)
On pipeline, the 14th gauge valve (32), the second pressure-reducing valve (33), the 5th pressure are set gradually on the manual sampling line (54)
Table (34), the 15th gauge valve (35), the 16th gauge valve (36), sample gas cylinder (37), the 17th gauge valve (38), the 18th
Gauge valve (39)；
Sampling slip (44) arrival end is connected to the pipe between the second instrument valve (4) and the 3rd gauge valve (5)
On line, sampling slip (44) port of export is connected between first check valve (11) and first safety valve (25)
On pipeline, magnetic valve (15A), sampling pump (16A), the tenth gauge valve (17A), movement are set gradually on the sampling slip (44)
Piston gas cylinder (18A), the 13rd gauge valve (21A), mobile piston gas cylinder (18A) the two ends top sets second pressure respectively
Table (22A), the 3rd pressure gauge (23A), mobile piston gas cylinder (18A) the two ends bottom connect the 11st instrument by pipeline respectively
Limit switch (24A), the described tenth are set on table valve (19A), the 12nd gauge valve (20A), the mobile piston gas cylinder (18A)
One gauge valve (19A), the 12nd gauge valve (20A) are connected to the branch road (57) of releasing by pipeline respectively, described to let out
Put on the pipeline that branch road (57) is connected between the 18th gauge valve (39) and residual gas bottle (40), the limit switch
(24A) is connected to automatic sampling controller (55) by the first limit switch cable (60), and the magnetic valve (15A) passes through first
Solenoid cable (61) connects the automatic sampling controller (55), power gas source pipeline (51) port of export and the electromagnetism
Valve (15A) is connected；
Described 3rd safety valve (27) one end is connected to the power gas source pipeline (51) after the 4th pressure gauge (31)
On pipeline, the 3rd safety valve (27) other end is connected to the safety relief header after the 18th gauge valve (39)
(59) on pipeline；
Described 4th safety valve (28) one end is connected to the pipe of the sampling slip header (45) before the second instrument valve (4)
On line, the 4th safety valve (28) other end is connected to the safety relief header after the 18th gauge valve (39)
(59) on pipeline.
2. gas pipeline automatic sampling device according to claim 1, it is characterised in that also standby taken including at least one
Sample branch road (42), standby sampling slip header (46), standby sampling return to header (48), standby branch road of releasing (58), the second peace
Full valve (26), back-up safety are released pipeline (53)；
Sampling main line (43) port of export is connected with standby sampling slip header (46) arrival end, the standby sampling
Branch road header (46) port of export returns to header (56) arrival end, the sample gas with the sample gas and returns to main line (49) arrival end company
Connect, the sample gas returns to header (56) port of export and is connected with described standby sampling return header (48) arrival end, it is described standby to take
Sample returns to header (48) port of export and is connected with described second safety valve (26) one end, the second safety valve (26) other end and institute
State back-up safety to release the connection of pipeline (53) arrival end, the back-up safety is released pipeline (53) port of export and the safety relief
Header (59) arrival end is connected, and safety relief header (59) port of export is connected with residual gas bottle (40)；
The 4th gauge valve (6), the 5th gauge valve (7) are set gradually on the standby sampling slip header (46)；
The 8th gauge valve (10), the second check valve (12) are set gradually on the standby branch road of releasing (58)；
Standby sampling slip (42) arrival end is connected between the 4th gauge valve (6) and the 5th gauge valve (7)
Pipeline on, standby sampling slip (42) port of export is connected to second check valve (12) and second safety valve
(26) on the pipeline between, standby magnetic valve (15B), standby sampling pump are set gradually on the standby sampling slip (42)
(16B), standby tenth gauge valve (17B), spare moving piston gas cylinder (18B), standby 13rd gauge valve (21B) are described standby
With mobile piston gas cylinder (18B) two ends top, standby second pressure table (22B), standby 3rd pressure gauge (23B), institute are set respectively
State spare moving piston gas cylinder (18B) two ends bottom and standby 11st gauge valve (19B), the standby tenth are connected by pipeline respectively
Standby limit switch (24B), the described standby 11st are set on two gauge valves (20B), the spare moving piston gas cylinder (18B)
Gauge valve (19B), standby 12nd gauge valve (20B) are connected to standby branch road of releasing (58) by pipeline respectively, described
Standby branch road of releasing (58) is connected on the pipeline between the 18th gauge valve (39) and residual gas bottle (40), described standby
The automatic sampling controller (55) is connected to by the second limit switch cable (63) with limit switch (24B), it is described standby
Magnetic valve (15B) is connected to the automatic sampling controller (55), the power gas source pipe by the second solenoid cable (62)
Road (51) port of export is connected with the standby magnetic valve (15B).
3. gas pipeline automatic sampling device according to claim 2, it is characterised in that also including sampling switching pipeline
(50), described sampling switching pipeline (50) one end is connected between the second instrument valve (4) and the 3rd gauge valve (5)
On pipeline, described sampling switching pipeline (50) other end be connected to the 4th gauge valve (6) and the 5th gauge valve (7) it
Between pipeline on, the 6th gauge valve (8) is set on sampling switching pipeline (50).
4. gas pipeline automatic sampling device according to claim 1, it is characterised in that the sampling slip header (45)
Arrival end is connected on the pipeline between the filter (29) and the manual sampling line (54) arrival end.
5. gas pipeline automatic sampling device according to claim 2, it is characterised in that the second standby sampling slip
Header (46) arrival end is connected on the pipeline between the filter (29) and the manual sampling line (54) arrival end.
6. a kind of gas pipeline automatic sampling method, it is characterised in that this method comprises the following steps：
Step 1, the condition of automatic sampling controller (55) setting sampling or cycle；
Step 2, sampling probe (1) inserts in the gas pipeline and takes natural gas from the gas pipeline, passes through the sampling
Natural gas is introduced the sampling main line (43) by the gas vent of probe (1)；Meanwhile, the first pressure table (3) detects institute
The natural gas for stating superpressure on the pressure on sampling main line (43), the sampling main line (43) is drawn by the 4th safety valve (28)
Enter safety relief header (59) and enter residual gas bottle (40) afterwards；
Step 3, the natural gas after pressure detecting enters sampling slip header (45), and natural gas passes through the sampling slip header
(45) enter in each sampling slip (44)；
Step 4, the natural gas on sampling main line (43) after filter (29), the first pressure-reducing valve (30) filtering decompression by being used as
Control the source of the gas of the magnetic valve (15A) of sampling pump (16A) start and stop；Meanwhile, the 4th pressure gauge (31) detection power gas source pipeline
(51) natural gas of superpressure introduces the safety by the 3rd safety valve (27) on the pressure on, the power gas source pipeline (51)
Header (59) of releasing enters residual gas bottle (40) afterwards；
Step 5, for each sampling slip (44), according to the sampling condition of setting or cycle, the automatic sampling controller
(55) opens solenoid valve (15A) is controlled by the first solenoid cable (61), the sampling pump (16A) starts working collection each
Natural gas on sampling slip (44), and the sample collected is sent into mobile piston gas cylinder (18A)；
The second pressure table (22A) on mobile piston gas cylinder (18A) the two ends top, the 3rd pressure gauge (23A) the detection shifting
The pressure of piston gas cylinder (18A), when the mobile piston gas cylinder (18A) 80% is full of, the automatic sampling controller
(55) limit switch on the sample cylinder on the mobile piston gas cylinder (18A) is controlled by the first limit switch cable (60)
(24A) is acted, and sampling process is automatically stopped；Meanwhile, the automatic sampling controller (55) passes through the first solenoid cable (61)
Receive the gas flow signals of each sampling slip (44)；
The 11st gauge valve (19A), the 12nd gauge valve set by mobile piston gas cylinder (18A) the two ends bottom
Remaining natural gas in the mobile piston gas cylinder (18A) is introduced branch road (57) of releasing by (20A), and multiple branch roads of releasing (57) will
Remnants naturally introduce the safety relief header (59) and enter residual gas bottle (40) afterwards；
Natural introduce of remnants on sampling slip (44) is sampled return header (47) by the port of export of multiple sampling slips (44), is led to
Cross the first safety valve (25) and remnants are naturally introduced into the safety relief header (59) afterwards into residual gas bottle (40)；
Step 6, the natural sample gas that enters of remnants on the sampling slip header (45) returns to header (56) afterwards into the sampling
Header (47) is returned to, remnants are naturally introduced into the safety relief header (59) by the first safety valve (25) enters described residual afterwards
Gas cylinder (40)；Meanwhile, the natural gas that the sample gas is returned in header (56) enters sample gas and returns to main line (49) afterwards into sampling
The return interface of probe (1), the natural gas of extraction is returned in the gas pipeline, and natural gas discharge is big in reduction probe tube
Tolerance.
7. gas pipeline automatic sampling method according to claim 6, it is characterised in that when sampling slip (44) overhauls nothing
When method works, open standby sampling slip (42) and be sampled, step 2~step 6 is replaced with：
Step 2, sampling probe (1) inserts in the gas pipeline and takes natural gas from the gas pipeline, passes through the sampling
Natural gas is introduced the sampling main line (43) by the gas vent of probe (1)；Meanwhile, the first pressure table (3) detects institute
The natural gas for stating superpressure on the pressure on sampling main line (43), the sampling main line (43) is drawn by the 4th safety valve (28)
Enter safety relief header (59) and enter residual gas bottle (40) afterwards；
Step 3, the natural gas after pressure detecting enters standby sampling slip header (46), and natural gas passes through the standby sampling branch
Road header (46) enters in each standby sampling slip (42)；
Step 4, the natural gas on sampling main line (43) after filter (29), the first pressure-reducing valve (30) filtering decompression by being used as
Control the source of the gas of the standby magnetic valve (15B) of standby sampling pump (16B) start and stop；Meanwhile, the 4th pressure gauge (31) detection power gas
The natural gas of superpressure introduces institute by the 3rd safety valve (27) on pressure on source capsule road (51), the power gas source pipeline (51)
State safety relief header (59) and enter residual gas bottle (40) afterwards；
Step 5, for each standby sampling slip (42), according to the sampling condition of setting or cycle, the automatic sampling control
Device (55) opens standby magnetic valve (15B) by the second solenoid cable (62) control, and the standby sampling pump (16B) starts work
Make the natural gas on each standby sampling slip (42) of collection, and the sample collected is sent into spare moving piston gas cylinder
In (18B)；
The standby second pressure table (22A) on spare moving piston gas cylinder (18B) the two ends top, standby 3rd pressure gauge
(23A) detects the pressure of the spare moving piston gas cylinder (18B), when the spare moving piston gas cylinder (18B) 80% is full of
When, the automatic sampling controller (55) controls the spare moving piston gas cylinder by the second limit switch cable (63)
Standby limit switch (24B) action on sample cylinder on (18B), sampling process is automatically stopped；Meanwhile, the automatic sampling
Controller (55) receives the gas flow signals of each standby sampling slip (42) by the second solenoid cable (62)；
Pass through standby 11st gauge valve (19B) of spare moving piston gas cylinder (18B) two ends bottom setting, the standby tenth
Remaining natural gas in the spare moving piston gas cylinder (18B) is introduced standby branch road of releasing (58) by two gauge valves (20B), many
Remnants are naturally introduced the safety relief header (59) and enter residual gas bottle (40) afterwards by individual standby branch road of releasing (58)；
Remnants on standby sampling slip (42) are naturally introduced standby sampling and returned by the port of export of multiple standby sampling slips (42)
Header (48) is returned, remnants are naturally introduced into the safety relief header (59) by the second safety valve (26) enters the residual gas afterwards
Bottle (40)；
Step 6, the natural sample gas that enters of remnants on the standby sampling slip header (46) returns to header (56) afterwards into described
Standby sampling returns to header (48), and by the second safety valve (26), by remnants, naturally to introduce the safety relief header (59) laggard
Enter the residual gas bottle (40)；Meanwhile, the natural gas that the sample gas is returned in header (56) enters sample gas and returned after main line (49)
Into the return interface of sampling probe (1), the natural gas of extraction is returned in the gas pipeline, it is natural in reduction probe tube
Gas discharges atm number.
8. gas pipeline automatic sampling method according to claim 7, it is characterised in that also including sampling switching pipeline
(50) sampling slip (44), is switched into standby sampling slip (42) by the sampling switching pipeline (50) to be sampled.
9. the gas pipeline automatic sampling method according to claim 6~8, it is characterised in that when sampling slip (44) and
Standby sampling slip (42) is overhauled when can not work, and is opened manual sampling line (54) and is sampled；The gas pipeline is certainly
Dynamic sampling method is replaced with：
Sampling probe (1) inserts in the gas pipeline and takes natural gas from the gas pipeline, passes through the sampling probe (1)
Gas vent natural gas is introduced into the sampling main line (43), natural gas reaches manual by the sampling main line (43)
Sampling line (54)；
Natural gas on the manual sampling line (54) enters sample gas cylinder (37) after being depressurized by the second pressure-reducing valve (33)；
Meanwhile, the first pressure table (3) is detected on the pressure on the sampling main line (43), the sampling main line (43)
The natural gas of superpressure introduces safety relief header (59) by the 4th safety valve (28) and enters residual gas bottle (40) afterwards；5th pressure gauge
(34) pressure on the manual sampling line (54) is detected, the natural gas of manual sampling line (54) superpressure introduces described
Safety relief header (59) enters residual gas bottle (40) afterwards；
Remaining natural gas on the sampling main line (43) enters sampling slip header (45) or standby sampling slip header
(46) enter sampling afterwards and return to header (47) or standby sampling return header (48), pass through the first safety valve (25) or the second safety
Remnants are naturally introduced the safety relief header (59) and enter residual gas bottle (40) afterwards by valve (26)；
Meanwhile, the natural gas that the sample gas is returned in header (56) enters sample gas and returns to main line (49) afterwards into sampling probe
(1) return interface, the natural gas of extraction is returned in the gas pipeline, natural gas discharge air in reduction probe tube
Amount.
10. the gas pipeline automatic sampling method according to claim 6 or 7, it is characterised in that each sampling slip (44)
Sending into yard control by the automatic sampling controller (55) with the gas flow signals of each standby sampling slip (42) is
In system.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141990A (en) * | 2018-07-27 | 2019-01-04 | 杰瑞(天津)石油工程技术有限公司 | Natural gas automatically controls continuous sampling system |
| CN109856277A (en) * | 2019-02-01 | 2019-06-07 | 中国石油天然气集团公司 | A kind of gas pipeline gas component real-time analysis method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141990A (en) * | 2018-07-27 | 2019-01-04 | 杰瑞(天津)石油工程技术有限公司 | Natural gas automatically controls continuous sampling system |
| CN109856277A (en) * | 2019-02-01 | 2019-06-07 | 中国石油天然气集团公司 | A kind of gas pipeline gas component real-time analysis method |
| CN109856334A (en) * | 2019-02-01 | 2019-06-07 | 中国石油天然气集团公司 | A kind of real-time analytical equipment of gas pipeline hydrogen sulfide |
| CN110007049A (en) * | 2019-02-01 | 2019-07-12 | 中国石油天然气集团公司 | A kind of gas pipeline hydrogen sulfide real-time analyzer and real-time analysis method |
| CN110007013A (en) * | 2019-02-01 | 2019-07-12 | 中国石油天然气集团公司 | A kind of gas pipeline gas component real-time analyzer and real-time analysis method |
| CN112554877A (en) * | 2020-12-08 | 2021-03-26 | 中国石油大学(华东) | Multi-phase metering sampling device with adjustable shunt ratio |
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