CN109340575A - A kind of online regulator and its online pressure regulation method of gas pipeline - Google Patents
A kind of online regulator and its online pressure regulation method of gas pipeline Download PDFInfo
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- CN109340575A CN109340575A CN201811303107.8A CN201811303107A CN109340575A CN 109340575 A CN109340575 A CN 109340575A CN 201811303107 A CN201811303107 A CN 201811303107A CN 109340575 A CN109340575 A CN 109340575A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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Abstract
The invention discloses a kind of online regulators of gas pipeline, it include: with pressure regulation tap line and spare pressure regulation tap line, it is connected separately with a technique ball valve thereon, process bands executing agency ball valve, monitor pressure-regulating valve, operating pressure regulating valve, thermometer on the spot, pressure transmitter, two pressure transmitters, check-valves and another technique ball valve, and process bands executing agency ball valve, monitoring pressure-regulating valve and operating pressure regulating valve are separately connected the high relay of pressure, one pressure controller and another pressure controller, and the pressure set points of the operating pressure regulating valve on two pipelines are different.The present invention also provides a kind of online pressure regulation methods of gas pipeline.The invention has the benefit that realizing voltage-regulating system in the on-line automatic completion in entire handoff procedure, smooth transition, high reliablity with road/spare road.
Description
Technical field
The present invention relates to gas pipeline technical fields, a kind of online regulator in particular to gas pipeline and
Its online pressure regulation method.
Background technique
Voltage-regulating system is one of the critical facility of gas pipeline point defeated station field.To guarantee that gas continuous and stable transports to downstream,
The design of voltage-regulating system is most important.The voltage-regulating system mainly used in the past, for cold standby, is adjusted with road and spare road switch mode
Pressure system mainly include front and back converge tracheae, process upstream switching ball, urgent block valve, pressure regulator valve (including monitoring pressure adjust
Valve and operating pressure regulating valve), downstream process ball valve, pressure controller.With road and spare road urgent block valve and pressure regulation
Valve (monitoring pressure-regulating valve+operating pressure regulating valve) process set value is all the same.When with the voltage-regulating system failure on road, therefore
Hinder signal to upload, spare road is switched to by process upstream switching ball.
There are the following problems for the voltage-regulating system of this cold standby mode: (one) and the not all system failure can be with signal shapes
Formula uploads, and when the system failure can not upload, back-up system can not come into operation in time, and the safety for causing entire voltage-regulating system is hidden
Suffer from；(2) two-way voltage-regulating system is cold standby, when needing to switch with/spare road voltage-regulating system, passes through process upstream switch valve
Switch with/spare road, at this moment regulating valve vigorous motion, pressure can not relatively smooth transition, or even surpass after having valve
The risk of pressure；(3) cold standby voltage-regulating system relies on simple logic judgment, has corresponding monitoring and protection to downstream pressure superpressure,
It is even truncated when necessary and is being switched to spare road with road voltage-regulating system, but for the blocking of road voltage-regulating system or the too low work of flow
Condition, without the respective logic for detecting and protecting automatically.
Summary of the invention
To solve the above problems, the purpose of the present invention is to provide a kind of online regulator of gas pipeline and its online
Pressure regulation method, it can be achieved that the road of pressure regulation on-line automatic switching, improve detection and control continuity, stability and reliability,
Facilitate operation and maintenance.
The present invention provides a kind of online regulators of gas pipeline, comprising:
With pressure regulation tap line, both ends are connect with the first header and the second header respectively, described with pressure regulation branch
The first technique ball valve, the first process bands executing agency ball valve, the first monitoring pressure-regulating valve, first dynamic has been sequentially connected in series on pipeline
Make pressure-regulating valve, first thermometer, first pressure transmitter, second pressure transmitter, third pressure transmitter, first on the spot
Check-valves and the second technique ball valve, the first monitoring pressure-regulating valve connect first pressure control with the first pressure transmitter
Device processed, the first operating pressure regulating valve and the second pressure transmitter connect second pressure controller, first work
Skill band executing agency's ball valve connects the high relay of first pressure with the third pressure transmitter；
Spare pressure regulation tap line, both ends are connect with first header and second header respectively, described spare
The 7th technique ball valve, the second process bands executing agency ball valve, the second monitoring pressure has been sequentially connected in series in pressure regulation tap line to adjust
Thermometer, the 4th pressure transmitter, the 5th pressure transmitter, the 6th pressure become on the spot for valve, the second operating pressure regulating valve, second
Device, second check-valve and the 8th technique ball valve are sent, the second monitoring pressure-regulating valve is connected with the 4th pressure transmitter
Third pressure controller, the second operating pressure regulating valve connect the 4th pressure controller with the 5th pressure transmitter,
Second process bands executing agency's ball valve connects the high relay of second pressure with the 6th pressure transmitter；
Wherein, first header is connect with first process pipelines one end, the first process pipelines other end and first
Flanged joint, second header are connect with second process pipelines one end, the second process pipelines other end and second flange
Connection；
The first operating pressure regulating valve is different with the pressure set points of the second operating pressure regulating valve.
As further improvement of the invention, the first pressure transmitter passes through first instrument cable and first pressure
Force controller connection, the first monitoring pressure-regulating valve are connect by the 4th instrument cable with the first pressure controller,
The second pressure transmitter is connect by second instrument cable with the second pressure controller, the first operating pressure tune
Section valve is connect by the 5th instrument cable with the second pressure controller, and the third pressure transmitter passes through third instrument electricity
Cable is connect with the high relay of the first pressure, and first process bands executing agency's ball valve passes through the 6th instrument cable and institute
State the high relay connection of first pressure；
4th pressure transmitter is connect by the 7th instrument cable with the third pressure controller, second prison
Pressure control force regulating valve is connect by the tenth instrument cable with the third pressure controller, and the 5th pressure transmitter passes through the
Eight instrument cables are connect with the 4th pressure controller, the second operating pressure regulating valve by the 11st instrument cable with
The 4th pressure controller connection, the 6th pressure transmitter pass through the 9th instrument cable and the second pressure Gao Gaoji
Electric appliance connection, second process bands executing agency's ball valve pass through the 12nd instrument cable and the high relay of the second pressure
Connection.
As further improvement of the invention, the both ends of first header and second header are all connected with pipe cap.
As further improvement of the invention, first process bands executing agency's ball valve and second process bands are executed
Mechanism ball valve is full-bore having a double meaning pair and lets out valve, and failure is closed；The first monitoring pressure-regulating valve and the second monitoring pressure
Force regulating valve is that failure is closed；The first operating pressure regulating valve and the second operating pressure regulating valve are that failure is opened.
As further improvement of the invention, the first check-valve and the second check-valve are axial-flow type non-return
Valve.
The present invention also provides a kind of online pressure regulation methods of the online regulator of gas pipeline, comprising the following steps:
Step 1, natural gas inputs first header, and passes through the first technique ball valve and the 7th technique ball valve
It respectively enters described with pressure regulation tap line and the spare pressure regulation tap line；
Step 2, it is high that the first pressure controller, the second pressure controller, the first pressure is set separately
Relay, the third pressure controller, the 4th pressure controller and the high relay of the second pressure pressure set
Definite value, and ensure that the first operating pressure regulating valve is different with the pressure set points of the second operating pressure regulating valve；
Step 3, SCADA system is according to the pressure of the first operating pressure regulating valve and the second operating pressure regulating valve
The selection of power setting value is described to carry out online pressure regulation with pressure regulation tap line or the spare pressure regulation tap line, described in selection
When carrying out online pressure regulation with pressure regulation tap line, 4 are entered step, when the selection spare pressure regulation tap line is adjusted online
When pressure, 5 are entered step；
Step 4, the first pressure controller, the second pressure controller and the high relay root of the first pressure
Control the first monitoring pressure-regulating valve, the first operating pressure regulating valve and first work respectively according to pressure set points
Valve opening of the skill with executing agency's ball valve；
Step 5, the third pressure controller, the 4th pressure controller and the high relay root of the second pressure
Control the second monitoring pressure-regulating valve, the second operating pressure regulating valve and second work respectively according to pressure set points
Valve opening of the skill with executing agency's ball valve；
Step 6, after online pressure regulation, natural gas is exported by second header.
It is further improved as of the invention, is SP by the pressure set points of the second pressure controller in step 3,
The pressure set points of the first pressure controller are SP+ △ P1, and the pressure set points of the high relay of the first pressure are
SP+ △ P2, the pressure set points of the 4th pressure controller are SP- △ P1, and the pressure of the third pressure controller is set
Value is SP+ △ P1, and the pressure set points of the high relay of the second pressure are SP+ △ P2；
Wherein, SP+ △ P2 is greater than SP+ △ P1, SP+ △ P1 and is greater than SP, and SP is greater than SP- △ P1.
It is further improved as of the invention, in step 4, first process bands executing agency ball valve, first prison
Pressure control force regulating valve, the first operating pressure regulating valve flow signal access instrument junction box after be sent into SCADA system
Carry out real-time monitoring；
First described in the first pressure transmitter, the second pressure transmitter and third pressure transmitter real-time monitoring
Pressure controller, the second pressure controller and the high relay of the first pressure pressure value and pressure signal is connect
SCADA system progress real-time monitoring is sent into after entering instrument junction box；
Described first on the spot thermometer temperature signal access instrument junction box after be sent into SCADA system supervised in real time
It surveys.
It is further improved as of the invention, in step 5, second process bands executing agency ball valve, second prison
Pressure control force regulating valve, the second operating pressure regulating valve flow signal access instrument junction box after be sent into SCADA system
Carry out real-time monitoring；
Described in 4th pressure transmitter, the 5th pressure transmitter and the 6th pressure transmitter real-time monitoring
Third pressure controller, the pressure value of the 4th pressure controller and the high relay of the second pressure and by pressure signal
SCADA system progress real-time monitoring is sent into after accessing instrument junction box；
Described second on the spot thermometer temperature signal access instrument junction box after be sent into SCADA system supervised in real time
It surveys.
It is further improved as of the invention, in step 3:
Described when carrying out online pressure regulation with pressure regulation tap line, the first check-valve unidirectional cutoff when selecting；
When selecting the spare pressure regulation tap line to carry out online pressure regulation, the second check-valve unidirectional cutoff.
The invention has the benefit that
Voltage-regulating system is realized in the on-line automatic completion in entire handoff procedure with road/spare road, it is smooth transition, reliable
Property it is high.
Outdoor sledge installing may be implemented to set, save space occupied.Pipe-line construction is set to more tend to standardization, modularization, people
Property, reduce working procedure, facilitate operation and maintenance, reduce equipment investment and operating expenses.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the online regulator of gas pipeline described in the embodiment of the present invention.
In figure,
1, first flange；2, the first process pipelines；3, pipe cap；4, the first header；5-1, with pressure regulation tap line；5-2,
First technique ball valve；5-3, the first process bands executing agency ball valve；5-4, the first monitoring pressure-regulating valve；5-5, the first movement pressure
Force regulating valve；5-6, first check-valve；5-7, the second technique ball valve；5-8, third technique ball valve；5-9, the first shut-off valve；5-
10, the first by-pass line；5-11, the first blow-down pipe；5-12, the 4th technique ball valve；5-13, the second shut-off valve；5-14, third
Flange；5-15, the second blow-down pipe；5-16, the 5th technique ball valve；5-17, third shut-off valve；5-18, the 4th flange；5-19,
Third blow-down pipe；5-20, the 6th technique ball valve；5-21, the 4th shut-off valve；5-22, the 5th flange；5-23, first are with regard to ground temperature
Spend table；5-24, first pressure transmitter；5-25, second pressure transmitter；5-26, third pressure transmitter；5-27, the first pressure
Force controller；5-28, second pressure controller；The high relay of 5-29, first pressure；5-30, first instrument cable；5-31,
Second instrument cable；5-32, third instrument cable；5-33, the 4th instrument cable；5-34, the 5th instrument cable；5-35, the 6th
Instrument cable；6-1, spare pressure regulation tap line；6-2, the 7th technique ball valve；6-3, the second process bands executing agency ball valve；6-
4, the second monitoring pressure-regulating valve；6-5, the second operating pressure regulating valve；6-6, second check-valve；6-7, the 8th technique ball valve；
6-8, the 9th technique ball valve；6-9, the 5th shut-off valve；6-10, the second by-pass line；6-11, the 4th blow-down pipe；6-12, the tenth
Technique ball valve；6-13, the 6th shut-off valve；6-14, the 6th flange；6-15, the 5th blow-down pipe；6-16, the 11st technique ball valve；
6-17, the 7th shut-off valve；6-18, the 7th flange；6-19, the 6th blow-down pipe；6-20, the 12nd technique ball valve；6-21, the 8th
Shut-off valve；6-22, eight treating observances are blue；The thermometer on the spot of 6-23, second；6-24, the 4th pressure transmitter；6-25, the 5th pressure become
Send device；6-26, the 6th pressure transmitter；6-27, third pressure controller；6-28, the 4th pressure controller；6-29, the second pressure
Li Gaogao relay；6-30, the 7th instrument cable；6-31, the 8th instrument cable；6-32, the 9th instrument cable；6-33, the tenth
Instrument cable；6-34, the 11st instrument cable；6-35, the 12nd instrument cable；7, the second header；8, the second process pipelines；9,
Second flange.
Specific embodiment
The present invention is described in further detail below by specific embodiment and in conjunction with attached drawing.
Embodiment 1, as shown in Figure 1, a kind of online regulator of gas pipeline of the embodiment of the present invention, comprising: with
Pressure regulation tap line 5-1 and spare pressure regulation tap line 6-1.
It is connect respectively with the first header 4 and the second header 7 with the both ends pressure regulation tap line 5-1, with pressure regulation bypass duct
The first technique ball valve 5-2, the first process bands executing agency ball valve 5-3, the first monitoring pressure-regulating valve have been sequentially connected in series on line 5-1
5-4, the first operating pressure regulating valve 5-5, first thermometer 5-23, first pressure transmitter 5-24, second pressure pick-up on the spot
Device 5-25, third pressure transmitter 5-26, first check-valve 5-6 and the second technique ball valve 5-7, the first monitoring pressure-regulating valve 5-
4 connect first pressure controller 5-27 with first pressure transmitter 5-24, and the first operating pressure regulating valve 5-5 and second pressure become
Send device 5-25 connection second pressure controller 5-28, the first process bands executing agency ball valve 5-3 and third pressure transmitter 5-26
Connect the high relay 5-29 of first pressure.
The spare both ends pressure regulation tap line 6-1 are connect with the first header 4 and the second header 7 respectively, spare pressure regulation bypass duct
The 7th technique ball valve 6-2, the second process bands executing agency ball valve 6-3, the second monitoring pressure-regulating valve have been sequentially connected in series on line 6-1
6-4, the second operating pressure regulating valve 6-5, second thermometer 6-23, the 4th pressure transmitter 6-24, the 5th pressure inverting on the spot
Device 6-25, the 6th pressure transmitter 6-26, second check-valve 6-6 and the 8th technique ball valve 6-7, the second monitoring pressure-regulating valve 6-
4 connect third pressure controller 6-27 with the 4th pressure transmitter 6-24, and the second operating pressure regulating valve 6-5 and the 5th pressure become
Send device 6-25 connection the 4th pressure controller 6-28, the second process bands executing agency ball valve 6-3 and the 6th pressure transmitter 6-26
Connect the high relay 6-29 of second pressure.
Wherein, the first header 4 is connect with 2 one end of the first process pipelines, 2 other end of the first process pipelines and first flange 1
Connection, the second header 7 are connect with 8 one end of the second process pipelines, and 8 other end of the second process pipelines is connect with second flange 9.First
The both ends of header 4 and the second header 7 are all connected with pipe cap 3.
To realize in the on-line automatic switching with pressure regulation tap line 5-1 and spare pressure regulation tap line 6-1, therefore, to assure that
The pressure set points of first operating pressure regulating valve 5-5 and the second operating pressure regulating valve 6-5 are different.
First technique ball valve 5-2 is equipped with the first by-pass line 5-10, and first one end by-pass line 5-10 is connected to first
Between header 4 and the first technique ball valve 5-2 on pressure regulation tap line 5-1, the connection of the first by-pass line 5-10 other end
Between the first technique ball valve 5-2 and the first process bands executing agency ball valve 5-3 on pressure regulation tap line 5-1.First
Along natural gas flow to being sequentially connected in series third technique ball valve 5-8 and the first shut-off valve 5-9 on by-pass line 5-10.
First one end blow-down pipe 5-11 is connected to the first technique ball valve 5-2 and the first process bands executing agency ball valve 5-3
Between on pressure regulation tap line 5-1, the first blow-down pipe 5-11 other end is vented by third flange 5-14 and yard
System is connected.Along natural gas flow to being sequentially connected in series the 4th technique ball valve 5-12 and the second shut-off valve 5- on first blow-down pipe 5-11
13.Second one end blow-down pipe 5-15 is connected to the monitoring of the first process bands executing agency ball valve 5-3 and first pressure-regulating valve 5-4
Between on pressure regulation tap line 5-1, the second blow-down pipe 5-15 other end is vented by the 4th flange 5-18 and yard
System is connected.Along natural gas flow to being sequentially connected in series the 5th technique ball valve 5-16 and third shut-off valve 5- on second blow-down pipe 5-15
17.The one end third blow-down pipe 5-19 be connected between third pressure transmitter 5-26 and first check-valve 5-6 with pressure regulation
On tap line 5-1, the third blow-down pipe 5-19 other end is connected by the 5th flange 5-22 with yard blowdown system.Third is put
Along natural gas flow to being sequentially connected in series the 6th technique ball valve 5-20 and the 4th shut-off valve 5-21 on blank pipe line 5-19.
7th technique ball valve 6-2 is equipped with the second by-pass line 6-10, and second one end by-pass line 6-10 is connected to first
On spare pressure regulation tap line 6-1 between header 4 and the 7th technique ball valve 6-2, the connection of the second by-pass line 6-10 other end
On spare pressure regulation tap line 6-1 between the 7th technique ball valve 6-2 and the second process bands executing agency ball valve 6-3.Second
Along natural gas flow to being sequentially connected in series the 9th technique ball valve 6-8 and the 5th shut-off valve 6-9 on by-pass line 6-10.
4th one end blow-down pipe 6-11 is connected to the 7th technique ball valve 6-2 and the second process bands executing agency ball valve 6-3
Between spare pressure regulation tap line 6-1 on, the 4th blow-down pipe 6-11 other end is vented by the 6th flange 6-14 and yard
System is connected.Along natural gas flow to being sequentially connected in series the tenth technique ball valve 6-12 and the 6th shut-off valve 6- on 4th blow-down pipe 6-11
13.5th one end blow-down pipe 6-15 is connected to the monitoring of the second process bands executing agency ball valve 6-3 and second pressure-regulating valve 6-4
Between spare pressure regulation tap line 6-1 on, the 5th blow-down pipe 6-15 other end is vented by the 7th flange 6-18 and yard
System is connected.Along natural gas flow to being sequentially connected in series the 11st technique ball valve 6-16 and the 7th shut-off valve on 5th blow-down pipe 6-15
6-17.6th one end blow-down pipe 6-19 connects the spare pressure regulation between the 6th pressure transmitter 6-26 and second check-valve 6-6
On tap line 6-1, the 6th blow-down pipe 6-19 other end is connected by eight treating observances orchid 6-22 with yard blowdown system.6th puts
Along natural gas flow to being sequentially connected in series the 12nd technique ball valve 6-20 and the 8th shut-off valve 6-21 on blank pipe line 6-19.
First pressure transmitter 5-24 is connect by first instrument cable 5-30 with first pressure controller 5-27, the first prison
Pressure control force regulating valve 5-4 is connect by the 4th instrument cable 5-33 with first pressure controller 5-27, second pressure transmitter 5-
25 are connect by second instrument cable 5-31 with second pressure controller 5-28, and the first operating pressure regulating valve 5-5 passes through the 5th
Instrument cable 5-34 is connect with second pressure controller 5-28, third pressure transmitter 5-26 by third instrument cable 5-32 with
The high relay 5-29 connection of first pressure, the first process bands executing agency ball valve 5-3 pass through the 6th instrument cable 5-35 and the
The high relay 5-29 connection of one pressure.4th pressure transmitter 6-24 is controlled by the 7th instrument cable 6-30 and third pressure
Device 6-27 connection, the second monitoring pressure-regulating valve 6-4 are connect by the tenth instrument cable 6-33 with third pressure controller 6-27,
5th pressure transmitter 6-25 is connect by the 8th instrument cable 6-31 with the 4th pressure controller 6-28, the second operating pressure tune
Section valve 6-5 is connect by the 11st instrument cable 6-34 with the 4th pressure controller 6-28, and the 6th pressure transmitter 6-26 passes through
9th instrument cable 6-32 is connect with the high relay 6-29 of second pressure, and the second process bands executing agency ball valve 6-3 passes through the
12 instrument cable 6-35 are connect with the high relay 6-29 of second pressure.
First process bands executing agency ball valve 5-3 and the second process bands executing agency ball valve 6-3 is that full-bore is having a double meaning double
Valve is let out, failure is closed；First monitoring pressure-regulating valve 5-4 and the second monitoring pressure-regulating valve 6-4 is that failure is closed；First movement
Pressure-regulating valve 5-5 and the second operating pressure regulating valve 6-5 is that failure is opened.
With the third pressure transmitter 5-26 on pressure regulation tap line 5-1 downstream and spare pressure regulation tap line 6-1
On the downstream of the 6th pressure transmitter 6-26 be respectively provided with first check-valve 5-6 and second check-valve 6-6, prevent with tune
The pressure anti-channeling for pressing tap line 5-1 and spare pressure regulation tap line 6-1 guarantees with pressure regulation tap line 5-1 and spare tune
It presses the pressure of tap line 6-1 acquisition respectively independent, avoids downstream pressure superelevation while triggering in all pressure regulation tap lines
Technique block valve.First check-valve 5-6 and second check-valve 6-6 is axial flow type check valve.
Embodiment 2, a kind of online pressure regulation method of the online regulator of gas pipeline, using online described in embodiment
Regulator, comprising the following steps:
Step 1, natural gas inputs the first header 4, and is distinguished by the first technique ball valve 5-2 and the 7th technique ball valve 6-2
Into with pressure regulation tap line 5-1 and spare pressure regulation tap line 6-1；
Step 2, first pressure controller 5-27, second pressure controller 5-28, the high relay of first pressure is set separately
Device 5-29, third pressure controller 6-27, the 4th pressure controller 6-28 and the high relay 6-29 of second pressure pressure set
Definite value, and ensure that the pressure set points of the first operating pressure regulating valve 5-5 and the second operating pressure regulating valve 6-5 are different；
Step 3, SCADA system is according to the pressure of the first operating pressure regulating valve 5-5 and the second operating pressure regulating valve 6-5
Setting value selection is carrying out online pressure regulation with pressure regulation tap line 5-1 or spare pressure regulation tap line 6-1, when selecting with pressure regulation
When tap line 5-1 carries out online pressure regulation, 4 are entered step, when selecting spare pressure regulation tap line 6-1 to carry out online pressure regulation,
Enter step 5；
Step 4, first pressure controller 5-27, second pressure controller 5-28 and the high relay 5-29 root of first pressure
The first monitoring pressure-regulating valve 5-4, the first operating pressure regulating valve 5-5 and the first process bands are controlled respectively according to pressure set points to hold
The valve opening of row mechanism ball valve 5-3；
Step 5, third pressure controller 6-27, the 4th pressure controller 6-28 and the high relay 6-29 root of second pressure
The second monitoring pressure-regulating valve 6-4, the second operating pressure regulating valve 6-5 and the second process bands are controlled respectively according to pressure set points to hold
The valve opening of row mechanism ball valve 6-3；
Step 6, after online pressure regulation, natural gas is exported by the second header 7.
It is SP, the pressure of first pressure controller 5-27 by the pressure set points of second pressure controller 5-28 in step 3
Setting value is SP+ △ P1, and the pressure set points of the high relay 5-29 of first pressure are SP+ △ P2, the 4th pressure controller 6-
28 pressure set points are SP- △ P1, and the pressure set points of third pressure controller 6-27 are SP+ △ P1, and second pressure is high
The pressure set points of relay 6-29 are SP+ △ P2；Wherein, SP+ △ P2 is greater than SP+ △ P1, SP+ △ P1 and is greater than SP, and SP is greater than
SP-△P1.In general, △ P1=0.05MPa, △ P2=0.1MPa.By being pressed with the first movement on pressure regulation tap line 5-1
The pressure set points of the second operating pressure regulating valve 6-5 on force regulating valve 5-5 and spare pressure regulation tap line 6-1 are different,
It realizes in the on-line automatic switching with pressure regulation tap line 5-1 and spare pressure regulation tap line 6-1, is not necessarily to manual intervention.
In step 4, the first process bands executing agency ball valve 5-3, the first monitoring pressure-regulating valve 5-4, the first operating pressure
The flow signal of regulating valve 5-5 is sent into SCADA system progress real-time monitoring after accessing instrument junction box；First pressure transmitter
5-24, second pressure transmitter 5-25 and third pressure transmitter 5-26 real-time monitoring first pressure controller 5-27, the second pressure
The pressure value of force controller 5-28 and the high relay 5-29 of first pressure are simultaneously sent after pressure signal is accessed instrument junction box
Enter SCADA system and carries out real-time monitoring；First on the spot thermometer 5-23 temperature signal access instrument junction box after be sent into SCADA
System carries out real-time monitoring.
In step 5, the second process bands executing agency ball valve 6-3, the second monitoring pressure-regulating valve 6-4, the second operating pressure
The flow signal of regulating valve 6-5 is sent into SCADA system progress real-time monitoring after accessing instrument junction box；4th pressure transmitter
6-24, the 5th pressure transmitter 6-25 and the 6th pressure transmitter 6-26 real-time monitoring third pressure controller 6-27, the 4th pressure
The pressure value of force controller 6-28 and the high relay 6-29 of second pressure are simultaneously sent after pressure signal is accessed instrument junction box
Enter SCADA system and carries out real-time monitoring；Second on the spot thermometer 6-23 temperature signal access instrument junction box after be sent into SCADA
System carries out real-time monitoring.
Further, in step 3: when selection when carrying out online pressure regulation with pressure regulation tap line 5-1, first check-valve 5-
6 unidirectional cutoffs；When selecting spare pressure regulation tap line 6-1 to carry out online pressure regulation, second check-valve 6-6 unidirectional cutoff.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of online regulator of gas pipeline characterized by comprising
With pressure regulation tap line (5-1), both ends are connect with the first header (4) and the second header (7) respectively, described with tune
The first technique ball valve (5-2), the first process bands executing agency ball valve (5-3), first have been sequentially connected in series in pressure tap line (5-1)
Monitor pressure-regulating valve (5-4), the first operating pressure regulating valve (5-5), first thermometer (5-23), first pressure pick-up on the spot
Device (5-24), second pressure transmitter (5-25), third pressure transmitter (5-26), first check-valve (5-6) and the second technique
Ball valve (5-7), first monitoring pressure-regulating valve (5-4) and the first pressure transmitter (5-24) connect first pressure control
Device (5-27) processed, the first operating pressure regulating valve (5-5) and the second pressure transmitter (5-25) connect second pressure
Controller (5-28), first process bands executing agency ball valve (5-3) and the third pressure transmitter (5-26) connection the
The high relay (5-29) of one pressure；
Spare pressure regulation tap line (6-1), both ends are connect with first header (4) and second header (7) respectively, institute
It states and has been sequentially connected in series the 7th technique ball valve (6-2), the second process bands executing agency ball valve on spare pressure regulation tap line (6-1)
(6-3), the second monitoring pressure-regulating valve (6-4), the second operating pressure regulating valve (6-5), second thermometer (6-23), the on the spot
Four pressure transmitters (6-24), the 5th pressure transmitter (6-25), the 6th pressure transmitter (6-26), second check-valve (6-6)
With the 8th technique ball valve (6-7), second monitoring pressure-regulating valve (6-4) and the 4th pressure transmitter (6-24) connection
Third pressure controller (6-27), the second operating pressure regulating valve (6-5) and the 5th pressure transmitter (6-25) are even
Meet the 4th pressure controller (6-28), second process bands executing agency ball valve (6-3) and the 6th pressure transmitter (6-
26) the high relay (6-29) of second pressure is connected；
Wherein, first header (4) connect with the first process pipelines (2) one end, the first process pipelines (2) other end with
First flange (1) connection, second header (7) connect with the second process pipelines (8) one end, second process pipelines (8)
The other end is connect with second flange (9)；
The first operating pressure regulating valve (5-5) is different with the pressure set points of the second operating pressure regulating valve (6-5).
2. online regulator according to claim 1, which is characterized in that the first pressure transmitter (5-24) passes through
First instrument cable (5-30) is connect with the first pressure controller (5-27), first monitoring pressure-regulating valve (5-4)
It is connect by the 4th instrument cable (5-33) with the first pressure controller (5-27), the second pressure transmitter (5-25)
It is connect by second instrument cable (5-31) with the second pressure controller (5-28), the first operating pressure regulating valve
(5-5) is connect by the 5th instrument cable (5-34) with the second pressure controller (5-28), the third pressure transmitter
(5-26) is connect by third instrument cable (5-32) with the high relay (5-29) of the first pressure, first process bands
Executing agency's ball valve (5-3) is connect by the 6th instrument cable (5-35) with the high relay (5-29) of the first pressure；
4th pressure transmitter (6-24) passes through the 7th instrument cable (6-30) and the third pressure controller (6-27)
Connection, second monitoring pressure-regulating valve (6-4) pass through the tenth instrument cable (6-33) and the third pressure controller (6-
27) it connects, the 5th pressure transmitter (6-25) passes through the 8th instrument cable (6-31) and the 4th pressure controller (6-
28) it connects, the second operating pressure regulating valve (6-5) is controlled by the 11st instrument cable (6-34) and the 4th pressure
Device (6-28) connection, the 6th pressure transmitter (6-26) are high by the 9th instrument cable (6-32) and the second pressure
Relay (6-29) connection, second process bands executing agency ball valve (6-3) pass through the 12nd instrument cable (6-35) and institute
State high relay (6-29) connection of second pressure.
3. online regulator according to claim 1, which is characterized in that first header (4) and described second is converged
The both ends of pipe (7) are all connected with pipe cap (3).
4. online regulator according to claim 1, which is characterized in that first process bands executing agency ball valve
(5-3) and second process bands executing agency ball valve (6-3) are full-bore having a double meaning pair and let out valve, and failure is closed；Described first
Monitoring pressure-regulating valve (5-4) and second monitoring pressure-regulating valve (6-4) are that failure is closed；The first operating pressure tune
It saves valve (5-5) and the second operating pressure regulating valve (6-5) is that failure is opened.
5. online regulator according to claim 1, which is characterized in that the first check-valve (5-6) and described
Two check-valves (6-6) are axial flow type check valve.
6. a kind of a kind of online pressure regulation side of the online regulator of gas pipeline as described in any one of claim 1-5
Method, which comprises the following steps:
Step 1, natural gas inputs first header (4), and passes through the first technique ball valve (5-2) and the 7th technique
Ball valve (6-2) respectively enters described with pressure regulation tap line (5-1) and the spare pressure regulation tap line (6-1)；
Step 2, the first pressure controller (5-27), the second pressure controller (5-28), described first is set separately
The high relay (5-29) of pressure, the third pressure controller (6-27), the 4th pressure controller (6-28) and described
The pressure set points of the high relay (6-29) of second pressure, and ensure the first operating pressure regulating valve (5-5) and described
The pressure set points of second operating pressure regulating valve (6-5) are different；
Step 3, SCADA system is according to the first operating pressure regulating valve (5-5) and the second operating pressure regulating valve (6-
5) pressure set points selection is described to be carried out with pressure regulation tap line (5-1) or the spare pressure regulation tap line (6-1)
Line pressure regulation enters step 4 when carrying out online pressure regulation with pressure regulation tap line (5-1) when selection is described, described spare when selecting
When pressure regulation tap line (6-1) carries out online pressure regulation, 5 are entered step；
Step 4, the first pressure controller (5-27), the second pressure controller (5-28) and the first pressure are high
Relay (5-29) controls first monitoring pressure-regulating valve (5-4), the first movement pressure according to pressure set points respectively
The valve opening of force regulating valve (5-5) and first process bands executing agency ball valve (5-3)；
Step 5, the third pressure controller (6-27), the 4th pressure controller (6-28) and the second pressure are high
Relay (6-29) controls second monitoring pressure-regulating valve (6-4), the second movement pressure according to pressure set points respectively
The valve opening of force regulating valve (6-5) and second process bands executing agency ball valve (6-3)；
Step 6, after online pressure regulation, natural gas is exported by second header (7).
7. online pressure regulation method according to claim 6, which is characterized in that in step 3, by the second pressure controller
The pressure set points of (5-28) are SP, and the pressure set points of the first pressure controller (5-27) are SP+ △ P1, described first
The pressure set points of the high relay (5-29) of pressure are SP+ △ P2, and the pressure of the 4th pressure controller (6-28) is set
Value is SP- △ P1, and the pressure set points of the third pressure controller (6-27) are SP+ △ P1, the second pressure Gao Gaoji
The pressure set points of electric appliance (6-29) are SP+ △ P2；
Wherein, SP+ △ P2 is greater than SP+ △ P1, SP+ △ P1 and is greater than SP, and SP is greater than SP- △ P1.
8. online pressure regulation method according to claim 6, which is characterized in that in step 4, first process bands execute machine
Structure ball valve (5-3), it is described first monitoring pressure-regulating valve (5-4), the first operating pressure regulating valve (5-5) flow signal
SCADA system progress real-time monitoring is sent into after accessing instrument junction box；
The first pressure transmitter (5-24), the second pressure transmitter (5-25) and third pressure transmitter (5-26) are real
When monitor the first pressure controller (5-27), the second pressure controller (5-28) and the high relay of the first pressure
Pressure signal is simultaneously accessed feeding SCADA system progress real-time monitoring after instrument junction box by the pressure value of device (5-29)；
Described first on the spot thermometer (5-23) temperature signal access instrument junction box after be sent into SCADA system supervised in real time
It surveys.
9. online pressure regulation method according to claim 6, which is characterized in that in step 5, second process bands execute machine
Structure ball valve (6-3), it is described second monitoring pressure-regulating valve (6-4), the second operating pressure regulating valve (6-5) flow signal
SCADA system progress real-time monitoring is sent into after accessing instrument junction box；
4th pressure transmitter (6-24), the 5th pressure transmitter (6-25) and the 6th pressure transmitter (6-
26) third pressure controller (6-27), the 4th pressure controller (6-28) described in real-time monitoring and the second pressure are high
Pressure signal is simultaneously accessed after instrument junction box and is sent into SCADA system and is supervised in real time by the pressure value of high relay (6-29)
It surveys；
Described second on the spot thermometer (6-23) temperature signal access instrument junction box after be sent into SCADA system supervised in real time
It surveys.
10. online pressure regulation method according to claim 6, which is characterized in that in step 3:
When selection is described when carrying out online pressure regulation with pressure regulation tap line (5-1), the first check-valve (5-6) is unidirectionally cut
Only；
When selecting the spare pressure regulation tap line (6-1) to carry out online pressure regulation, the second check-valve (6-6) is unidirectionally cut
Only.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110185932A (en) * | 2019-05-20 | 2019-08-30 | 中国石油天然气集团有限公司 | A kind of processed oil pipeline pressure-reducing station hot standby regulator online |
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|---|---|
| CN109340575B (en) | 2020-05-22 |
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Inventor after: Nie Zhongwen Inventor after: Ren Yanguang Inventor after: Huang Jing Inventor after: Wang Yongji Inventor after: Zuo Yong Inventor after: Kong Yuding Inventor after: Jiang Nianchen Inventor after: Feng Cheng Inventor after: Shan Chao Inventor after: Yu Bin Inventor after: Yu Yongzhi Inventor after: Gong Yunfeng Inventor after: Pang Baohua Inventor before: Nie Zhongwen Inventor before: Huang Jing Inventor before: Wang Yongji Inventor before: Zuo Yong Inventor before: Kong Yuding Inventor before: Jiang Nianchen Inventor before: Feng Cheng Inventor before: Shan Chao Inventor before: Yu Bin Inventor before: Yu Yongzhi Inventor before: Gong Yunfeng Inventor before: Pang Baohua |
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