CN208222083U - Natural gas two stage pressure regulator - Google Patents
Natural gas two stage pressure regulator Download PDFInfo
- Publication number
- CN208222083U CN208222083U CN201820769616.9U CN201820769616U CN208222083U CN 208222083 U CN208222083 U CN 208222083U CN 201820769616 U CN201820769616 U CN 201820769616U CN 208222083 U CN208222083 U CN 208222083U
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- pipeline
- pressure regulator
- valve
- pressure
- natural gas
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Abstract
The utility model discloses a kind of natural gas two stage pressure regulators, the partial pressure mechanism including main pressure regulator system, auxiliary voltage-regulating system and connection between main pressure regulator system and auxiliary voltage-regulating system；Main pressure regulator system and auxiliary voltage-regulating system include the import electrical ball valve being sequentially communicated by pipeline, heater, safety cut-off valve, monitoring pressure regulator valve, work pressure regulator valve, flowmeter and outlet electrical ball valve；Dividing mechanism includes partial pressure pipeline and control valve, and the one end for dividing pipeline is connected on the pipeline to be worked between pressure regulator valve and flowmeter in main pressure regulator system, and other end connection is on the pipeline in auxiliary voltage-regulating system between import electrical ball valve and heater.Regulator can carry out the random switching between level-one pressure regulation mode and second voltage regulation mode according to the water dew point of temperature and natural gas after pressure difference, pressure regulation automatically, it is ensured that the safe and stable operation of the regulator of Gas Stations；The apparatus structure is simple, occupies little space, and adjustable pressure limit is wide, highly-safe.
Description
Technical field
The utility model relates to natural gas transportation technical fields, and in particular to natural gas two stage pressure regulator.
Background technique
Rapid development and growing environmental protection pressure with China's economy, long defeated natural gas tube domestic in recent years
Road development is very rapid, such as a western line, western two wires, western three lines, middle remote pipeline and your middle pipeline.These gas transmission lines it is common
Feature is long range, Large Diameter Pipeline, high pressure, and conveying distance is mostly at 1000 kilometers or more, and pipe diameter is mostly at 1000 millimeters
More than, design pressure is generally all more than 10 megapascal.Long distance gas pipeline is when carrying out point defeated to local user along the line, usually
Pressure is adjusted downward to 2-3 megapascal by 10 megapascal, by joule thomson effect (throttle effect) it is found that when throttling pressure regulation, meeting
Cause temperature drop, in general, pressure 1 megapascal of every decline, the natural gas temperature in pipe can decline 4-7 DEG C, too low temperature meeting after pressure regulation
Go out the elutriation in natural gas, block the pilot valve of valve, cause block valve accidentally to turn off, hydrate can be generated when serious, blocks
Pipeline causes production accident.
Very widely used today regulator is single-stage pressure regulation, with good security performance, but since pressure regulation is one
Secondary completion, pressure drop is excessive, and is limited by the heating efficiency of material and heating device, and natural gas heating temperature again can not before pressure regulation
Be heated to very high, spend natural temperature low, cause to be precipitated in natural gas liquid water formed Hydrate Plugging pipeline and
Valve pilot valve affects so that safety cut-off valve is frequently malfunctioned to production.
Utility model content
The purpose of this utility model is to provide a kind of natural gas two stage pressure regulators, to solve existing regulator pressure regulation
The problem of liquid water slug pipeline and valve pilot valve is precipitated in natural gas caused by natural gas temperature afterwards is low.
The technical solution that the utility model solves above-mentioned technical problem is as follows: natural gas two stage pressure regulator, including homophony
Pressure system, with the auxiliary voltage-regulating system of main pressure regulator system connectivity and be connected to main pressure regulator system and auxiliary voltage-regulating system between
Divide mechanism；
The main pressure regulator system includes passing sequentially through import electrical ball valve, the heating that pipeline is connected to auxiliary voltage-regulating system
Device, safety cut-off valve, monitoring pressure regulator valve, work pressure regulator valve, flowmeter and outlet electrical ball valve；
The partial pressure mechanism includes the control valve for dividing pipeline and being arranged on partial pressure pipeline, one end of the partial pressure pipeline
It is connected on the pipeline to be worked between pressure regulator valve and flowmeter in main pressure regulator system, the other end of the partial pressure pipeline is connected to auxiliary
It helps on the pipeline in voltage-regulating system between import electrical ball valve and heater.
Further, inlet pressure gauge, the heating are connected on the pipeline among the import electrical ball valve and heater
Inlet temperature table is connected on pipeline between device and safety cut-off valve；On pipeline between the work pressure regulator valve and flowmeter
Also it is connected with delivery gauge, pressure transmitter, temperature transmitter, outlet temperature table and flow transmitter in turn, and described
Transmission control unit is respectively connected on pressure transmitter and temperature transmitter；It is connected on the flow transmitter and heater phase
The computer heating control case of connection.
Further, filter, and the filter are communicated on the pipeline between the import electrical ball valve and heater
The upper end far from pipeline is connected with sewage pipe.
Further, the safety cut-off valve and monitoring pressure regulator valve between pipeline, monitoring pressure regulator valve and work pressure regulator valve it
Between pipeline be obliquely installed and be wound with heating tape.
Further, the pipe diameter between the work pressure regulator valve and outlet electrical ball valve is work pressure regulator valve and import electricity
2 times of pipe diameter between dynamic ball valve.
Further, PID controller is connected on the flowmeter.
It, can be with the utility model has the following beneficial effects: natural gas two stage pressure regulator provided by the utility model
The effective adjusting for completing natural gas from high pressure to low pressure, and regulator can be according to temperature after pressure difference, pressure regulation and natural
The water dew point of gas to carry out the random switching between level-one pressure regulation mode and second voltage regulation mode automatically, it is ensured that the tune of Gas Stations
The safe and stable operation of pressure device；The apparatus structure is simple, occupies little space, and automatic controlling level is high, and pressure model is adjusted
It encloses extensively, it is highly-safe.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the utility model flow chart；
Appended drawing reference shown in Fig. 1 to Fig. 2 respectively indicates are as follows: 1- main pressure regulator system, 2- assist voltage-regulating system, and 3- divides machine
Structure, 4- pipeline, 5- inlet pressure gauge, 6- inlet temperature table, 7- delivery gauge, 8- pressure transmitter, 9- temperature transmitter,
10- outlet temperature table, 11- flow transmitter, 12- transmission control unit, 13- computer heating control case, 14- filter, 15- blowdown
Pipe, 16-PID controller, 101- import electrical ball valve, 102- heater, 103- safety cut-off valve, 104- monitor pressure regulator valve,
105- work pressure regulator valve, 106- flowmeter, 107- export electrical ball valve, and 301- divides pipeline, 302- control valve.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
Natural gas two stage pressure regulator, including main pressure regulator system 1, the auxiliary voltage-regulating system 2 being connected to main pressure regulator system 1 with
And partial pressure mechanism 3 of the connection between main pressure regulator system 1 and auxiliary voltage-regulating system 2.
Main pressure regulator system 1 provides level-one pressure regulation, and pressure regulation is once completed, and realizes that natural gas is adjusted from high pressure to low pressure, auxiliary
Voltage-regulating system 2 provides second voltage regulation, and natural gas temperature after pressure regulation is too low, when being lower than water dew point, will be led by dividing mechanism 3
Connection between voltage-regulating system 1 and auxiliary voltage-regulating system 2 is connected, and regulator automatically switches to second level string by level-one pressure regulation at this time
Joint debugging pressure reduces each pressure regulation pressure difference, so that the temperature of natural gas is higher than water dew point, effectively prevents the analysis of liquid water in natural gas
Out, so as to avoid Hydrate Plugging pipeline is generated after pressure regulation in pipeline, it ensure that the operational safety of natural gas line.
Main pressure regulator system 1 and auxiliary voltage-regulating system 2 include passing sequentially through import electrical ball valve 101 that pipeline 4 be connected to, adding
Hot device 102, safety cut-off valve 103, monitoring pressure regulator valve 104, work pressure regulator valve 105, flowmeter 106 and outlet electrical ball valve 107.
Pipeline 4 is the pipeline of natural gas transportation, and each component is connected in series by pipeline 4.Heater 102 is used for gas
Heating, to prevent gas temperature after pressure regulation too low, the watt level of heater 102 depends on the size for dividing throughput rate.Inlet and outlet
Electrical ball valve is used for the real-time control to gas transport status, and electrical ball valve is opened, and natural gas normally conveys, when electrical ball valve closes
When closing, natural gas closes conveying.Flowmeter 106 is for measuring gas flow and temperature in pipeline, in order to main pressure regulator system 1
The monitoring of natural gas temperature after internal pressure-regulating carries out level-one pressure regulation using main pressure regulator system 1 if temperature is higher than water dew point；
If temperature is lower than water dew point, the conducting of mechanism 3 is divided, realize main pressure regulator system 1 and assists the conducting between voltage-regulating system 2, it is real
Existing second voltage regulation.Under normal circumstances, safety cut-off valve 103 and monitoring pressure regulator valve 104 are in normally open position, safety cut-off valve 103
For in case of emergency cutting off to pipeline state, guarantee equipment safety.Monitoring pressure regulator valve 104 is for monitoring pipeline
Middle gas pressure；Work pressure regulator valve 105 is for controlling manifold pressure, when the pressure regulator valve 105 that works in main pressure regulator system 1
When breaking down and being unable to control pressure, monitoring pressure regulator valve 104 is started to work, to maintain the safe range of gas pressure, if prison
Control pressure valve 104 also breaks down, and when not can control gas pressure, safety cut-off valve 103 then automatically cuts off gas source, switches simultaneously
To auxiliary voltage-regulating system 2, the safety of pipeline and equipment is ensured.
Partial pressure mechanism 3 includes partial pressure pipeline 301 and the control valve 302 divided on pipeline 301 is arranged in, and divides pipeline 301
One end connection working on the pipeline 4 between pressure regulator valve 105 and flowmeter 106 in main pressure regulator system 1, partial pressure pipeline 301
Other end connection is on the pipeline 4 in auxiliary voltage-regulating system 2 between import electrical ball valve 101 and heater 102.Divide pipeline
301 be the pipeline for connecting main pressure regulator system 1 and assisting voltage-regulating system 2, and conducting and the pass for realizing pipeline are opened and closed by control valve 302
It closes.When carrying out level-one pressure regulation, control valve 302 is closed, and makes to divide the closing of pipeline 301.When needing second voltage regulation, control valve
302 open, and regulator is switched to two-stage tandem pressure regulation by level-one pressure regulation, reduces pressure regulation pressure difference with this, prevent liquid in natural gas
The precipitation of state water；Securely and reliably.
For realization device automatic operation, in the utility model, among import electrical ball valve 101 and heater 102
It is connected with inlet pressure gauge 5 on pipeline 4, is connected with inlet temperature on the pipeline 4 between heater 102 and safety cut-off valve 103
Table 6；Work pressure regulator valve 105 and flowmeter 106 between pipeline 4 on be also connected in turn delivery gauge 7, pressure transmitter 8,
Temperature transmitter 9, outlet temperature table 10 and flow transmitter 11, and be respectively connected on pressure transmitter 8 and temperature transmitter 9
Transmission control unit 12；The computer heating control case 13 being connected with heater 102 is connected on flow transmitter 11.Each element monitors
The data obtained is uploaded to host computer by PLC.Inlet pressure gauge 5, inlet temperature table 6 are respectively used to display natural gas original state
Pressure and temperature, convenient for after pressure regulation pressure and temperature be compared and obtain pressure difference and temperature difference.Computer heating control case 13 is used
In the working condition of control heater 102.Transmission control unit 12 is spread out of for receiving temperature transmitter 9 and pressure transmitter 8
Output signal.Temperature transmitter 9, pressure transmitter 8 be used for by after pressure regulation gas pressure and temperature variable be converted to can
The normalization output signal of transmission, output signal are transmitted on transmission control unit 12, consequently facilitating transmission control unit 12 is right
The adjusting of gas pressure and temperature after pressure regulation controls.When the temperature is too low, when being lower than water dew point, computer heating control case 13 is automatic
It controls heater 102 to open, to heat to natural gas, improves temperature；When temperature is higher than water dew point, then keep existing
State.Whole-course automation operation is realized, this is easy to operate, convenient and efficient.
Bonding blocking of the impurity in pipeline in natural gas in order to prevent, in the utility model, import electrical ball valve 101 with
Filter 14 is communicated on pipeline 4 between heater 102, and the end on filter 14 far from pipeline 4 is connected with sewage pipe
15.Filter 14 is accurate filter 14, and precision reaches 1 micron, during natural gas transportation, can effectively be filtered natural
Minute impurities in gas, filtered impurity are discharged to the external world by sewage pipe 15, guarantee the normal defeated of the natural gas in pipeline
It send.
In order to avoid the condensed water ice blockage pipeline in pipeline 4, in the utility model, safety cut-off valve 103 and monitoring
The pipeline 4 between pipeline 4, monitoring pressure regulator valve 104 and the pressure regulator valve 105 that works between pressure regulator valve 104 is obliquely installed and winds
There is heating tape.By being obliquely installed, avoid accumulation of the condensed water in pipeline, heating tape can produce thermal energy, to 4 outer wall of pipeline into
Row heat exchange guarantees the temperature in pipeline 4, avoids the too low icing for causing condensed water in pipeline of temperature and block pipeline.
In order to avoid the formation of gas hydrates in pipeline, in the utility model, work pressure regulator valve 105 and outlet are electronic
4 caliber of pipeline between ball valve 107 is 2 times of 4 caliber of pipeline between work pressure regulator valve 105 and import electrical ball valve 101.Pass through
Adjustment transformation to 4 caliber of pipeline, reinforces the outflow of water body in pipeline 4, avoids and form hydrate in pipeline 4.
In order to realize the control to pressure after natural gas pressure regulating and flow automatically, in the utility model, connect on flowmeter 106
It is connected to PID controller 16.PID controller 16 be bias adjustment is carried out to control system, thus make the actual value of controlled variable with
The consistent device of predetermined value that technique requires；By PID controller 16, can both realize to the pressure after the fixed pressure regulation of natural gas,
Flow after fixed pressure regulation may be implemented again.
The above are specific embodiment of the present utility model, can be seen that from true process provided by the utility model
Natural gas two stage pressure regulator can effectively complete adjusting of the natural gas from high pressure to low pressure, and regulator can basis
The water dew point of temperature and natural gas after pressure difference, pressure regulation to carry out automatically between level-one pressure regulation mode and second voltage regulation mode with
Meaning switching, it is ensured that the safe and stable operation of the regulator of Gas Stations；The apparatus structure is simple, occupies little space, automation
Controlling extent is high, and adjustable pressure limit is wide, highly-safe.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (6)
1. natural gas two stage pressure regulator, which is characterized in that be connected to including main pressure regulator system (1), with main pressure regulator system (1) auxiliary
Help the partial pressure mechanism (3) of voltage-regulating system (2) and connection between main pressure regulator system (1) and auxiliary voltage-regulating system (2)；
The main pressure regulator system (1) includes the import electrical ball valve for passing sequentially through pipeline (4) and being connected to auxiliary voltage-regulating system (2)
(101), heater (102), safety cut-off valve (103), monitoring pressure regulator valve (104), work pressure regulator valve (105), flowmeter (106)
With outlet electrical ball valve (107)；
Partial pressure mechanism (3) includes the control valve (302) of partial pressure pipeline (301) and setting in partial pressure pipeline (301), described
One end connection of pipeline (301) is divided in the pipe in main pressure regulator system (1) between work pressure regulator valve (105) and flowmeter (106)
On road (4), the other end of partial pressure pipeline (301) is connected to the import electrical ball valve (101) in auxiliary voltage-regulating system (2) and adds
On pipeline (4) between hot device (102).
2. natural gas two stage pressure regulator according to claim 1, which is characterized in that the import electrical ball valve (101)
It is connected with inlet pressure gauge (5) on intermediate pipeline (4) with heater (102), the heater (102) and safety cut-off valve
(103) inlet temperature table (6) are connected on the pipeline (4) between；Between the work pressure regulator valve (105) and flowmeter (106)
Pipeline (4) on be also connected with delivery gauge (7), pressure transmitter (8), temperature transmitter (9), outlet temperature table in turn
(10) and flow transmitter (11), and on the pressure transmitter (8) and temperature transmitter (9) it is respectively connected with transmission control dress
Set (12)；The computer heating control case (13) being connected with heater (102) is connected on the flow transmitter (11).
3. natural gas two stage pressure regulator according to claim 1 or 2, which is characterized in that the import electrical ball valve
(101) it is communicated with filter (14) on the pipeline (4) between heater (102), and far from pipeline on the filter (14)
(4) end is connected with sewage pipe (15).
4. natural gas two stage pressure regulator according to claim 3, which is characterized in that the safety cut-off valve (103) with
The pipeline (4) monitored between pipeline (4), monitoring pressure regulator valve (104) and work pressure regulator valve (105) between pressure regulator valve (104) is equal
It is obliquely installed and is wound with heating tape.
5. natural gas two stage pressure regulator according to claim 1, which is characterized in that the work pressure regulator valve (105) with
Pipeline (4) caliber between outlet electrical ball valve (107) is managed between work pressure regulator valve (105) and import electrical ball valve (101)
2 times of road (4) caliber.
6. natural gas two stage pressure regulator according to claim 2, which is characterized in that connected on the flowmeter (106)
There are PID controller (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820769616.9U CN208222083U (en) | 2018-05-22 | 2018-05-22 | Natural gas two stage pressure regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820769616.9U CN208222083U (en) | 2018-05-22 | 2018-05-22 | Natural gas two stage pressure regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208222083U true CN208222083U (en) | 2018-12-11 |
Family
ID=64509310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820769616.9U Expired - Fee Related CN208222083U (en) | 2018-05-22 | 2018-05-22 | Natural gas two stage pressure regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208222083U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513600A (en) * | 2019-09-06 | 2019-11-29 | 中国石油工程建设有限公司 | A kind of gaseous ethane pipe end flow assurance system and method |
| CN111237642A (en) * | 2020-03-05 | 2020-06-05 | 中国建材国际工程集团有限公司 | Gas pressure control system |
| CN117803857A (en) * | 2024-03-01 | 2024-04-02 | 上海华创自动化工程股份有限公司 | Natural gas automatic heating system and method |
| CN117803857B (en) * | 2024-03-01 | 2024-06-28 | 上海华创自动化工程股份有限公司 | Natural gas automatic heating system and method |
-
2018
- 2018-05-22 CN CN201820769616.9U patent/CN208222083U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513600A (en) * | 2019-09-06 | 2019-11-29 | 中国石油工程建设有限公司 | A kind of gaseous ethane pipe end flow assurance system and method |
| CN110513600B (en) * | 2019-09-06 | 2024-04-16 | 中国石油工程建设有限公司 | Gaseous ethane pipeline tail end flow guarantee system and method |
| CN111237642A (en) * | 2020-03-05 | 2020-06-05 | 中国建材国际工程集团有限公司 | Gas pressure control system |
| CN117803857A (en) * | 2024-03-01 | 2024-04-02 | 上海华创自动化工程股份有限公司 | Natural gas automatic heating system and method |
| CN117803857B (en) * | 2024-03-01 | 2024-06-28 | 上海华创自动化工程股份有限公司 | Natural gas automatic heating system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181211 Termination date: 20190522 |