CN201973452U - Medium pressure regulating box for compressed natural gas supply station - Google Patents
Medium pressure regulating box for compressed natural gas supply station Download PDFInfo
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- CN201973452U CN201973452U CN2011200112723U CN201120011272U CN201973452U CN 201973452 U CN201973452 U CN 201973452U CN 2011200112723 U CN2011200112723 U CN 2011200112723U CN 201120011272 U CN201120011272 U CN 201120011272U CN 201973452 U CN201973452 U CN 201973452U
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- supply station
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- natural gas
- pressure regulating
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Abstract
The utility model provides a medium pressure regulating box for a compressed natural gas supply station, which comprises a plurality of parallel main pressure regulating systems in connection and a plurality of parallel branch pressure regulating systems in connection. Gas inlet pipelines of the main pressure regulating systems and the branch pressure regulating systems are connected with an external gas unloading component, and gas outlet pipelines of the main pressure regulating systems and the branch pressure regulating systems are connected with a pipe network of a gas supply station. Each main pressure regulating system comprises a main pressure regulating part which is connected between the gas unloading component and the pipe network of the gas supply station through pipelines, and each branch pressure regulating system comprises a branch pressure regulating part which is connected between the gas unloading component and the pipe network of the gas supply station through pipelines. When air pressure difference between an outlet and an inlet of a pressure regulator and needed flow is not achieved, pressure of natural gas can be regulated by the branch pressure regulating systems, the natural gas in a transport vehicle is emptied, and thereby the natural gas in a gas tank can be fully used, transportation resources can be saved, and simultaneously pressure regulating and supplying efficiency of the natural gas can be improved.
Description
Technical field
The utility model relates to a kind of voltage-regulating technique that is used for the natural gas supply field, is specifically related to a kind of middle pressure pressure-regulating box of compressed natural gas supply station.
Background technique
At present, the gas line network of rock gas does not cover All Ranges as yet, the cities and towns, suburb of surrounding city and population from other places some non-pipe network areas such as concentration zones of living for example, need to adopt the technology of compressed natural gas, rock gas compression back is transported to the natural gas supply station in non-pipe network zone by extraordinary transport vehicle, again rock gas is carried out reduced pressure treatment, the air pressure of rock gas and temperature are reached be transferred to each user after the coincidence tube network mark standard and use.Unload in the process of gas at the supply station of extraordinary transport vehicle in prior art, gas flow reduces gradually in the extraordinary transport vehicle gas holder, the gas pressure of rock gas also reduces gradually in the gas holder, during underway pressure pressure regulation operation, when the gas pressure of rock gas in the gas holder is lower than 0.6 MPa, because gas pressure is too small, spring in the pressure governor all can't be opened, gas discharge can reduce, hinder the gas path pipe that rock gas enters supply station, yet still having a certain amount of rock gas in the extraordinary transport vehicle gas holder does not unsnatch, extraordinary transport vehicle carries rock gas the gas source place of strile-bacing again, waste and cost waste that this can cause transport resource reduce the efficient of supplying rock gas.
The model utility content
The utility model provides a kind of middle pressure pressure-regulating box of compressed natural gas supply station, and compressed natural gas is adjusted to the standard that meets gas distributing system, and can unsnatch the rock gas in the compressed natural gas transport vehicle gas holder, reduces production costs, improves air feed efficient.
For achieving the above object, the utility model provides a kind of middle pressure pressure-regulating box of compressed natural gas supply station, it is characterized in that, this pressure-regulating box comprises some the parallel main pressure regulator systems that connect, and some the parallel bypass voltage-regulating systems that connect;
Above-mentioned main pressure regulator system is connected the external pneumatic module that unloads with the suction port pipeline of bypass voltage-regulating system; This main pressure regulator system is connected the pipe network of supply station with the air outlet pipeline of bypass voltage-regulating system;
Above-mentioned main pressure regulator system comprises by pipeline and is connected main pressure regulator parts between the described pipe network that unloads pneumatic module and supply station;
Above-mentioned bypass voltage-regulating system comprises by pipeline and is connected bypass voltage regulation part between the described pipe network that unloads pneumatic module and supply station.
Above-mentioned main pressure regulator parts and unload that the self-unloading pneumatic module rises between the pneumatic module also are provided with pressure transducer, main road ball valve, filter, emergency cut-off valve and excess pressure cutout valve successively.
Above-mentioned main pressure regulator parts comprise the pressure governor that some levels are connected in series.
Also be provided with safety valve between the pipe network of above-mentioned main pressure regulator system and the air outlet of bypass voltage-regulating system and supply station.
Above-mentioned bypass voltage regulation part and unload and also be provided with release valve ball between the pneumatic module.
The above-mentioned main pressure regulator system and the pipeline of bypass voltage-regulating system are provided with some sniffers, and these several sniffer circuit connect the input end of outside control system; The circuit of output terminal of this control system connects the emergency cut-off valve.
Above-mentioned main pressure regulator system and unload on the pipeline between the pneumatic module and also be provided with heating equipment.
Transport vehicle will be pressed pressure-regulating box in the compressed natural gas input, pressure transducer detects the air pressure of compressed natural gas, when compressed natural gas air pressure is higher than the low limit value of pressure transducer setting, rock gas enters the main pressure regulator system, heating equipment preheats the rock gas of input main pressure regulator system, and after rock gas also carried out pretreatment, the main pressure regulator assembly carried out the adjustment of classification air pressure to rock gas.
When compressed natural gas air pressure was lower than the low limit value of pressure transducer setting, rock gas entered the bypass voltage-regulating system, and bypass pressure regulation assembly carries out the air pressure adjustment to rock gas, and exports the supply station pipe network to.
Rock gas through pressure regulation need transfer to safety valve, if rock gas air pressure is too high, then safety valve is opened, an amount of rock gas is discharged, drop to the normal pressure safety valve until rock gas air pressure and close, if rock gas air pressure is normally not too high, then safety valve keeps cutting out, do not discharge rock gas, rock gas is transferred to the supply station pipe network.
The middle pressure pressure-regulating box of the utility model compressed natural gas supply station is compared with prior art, its advantage is, the utility model is provided with the bypass voltage-regulating system, can be too small at the air pressure in the extraordinary transport vehicle compressed natural gas gas tank, and when causing to satisfy the requiring of flow, open the bypass voltage-regulating system, the rock gas less to air pressure carries out pressure regulation, rock gas in the extraordinary transport vehicle compressed natural gas of the abundant emptying gas tank, rock gas in the gas tank is fully used, can be and cause a certain amount of rock gas that is transported to supply station is transported back again the ground that fills of compressed natural gas because of emptying not, make full use of the resource of communications and transportation, also improved the efficient of rock gas pressure regulation and supply simultaneously;
Be provided with heating equipment before the intake line of main pressure regulator of the present utility model system, can the rock gas that enter the main pressure regulator system be preheated, make the rock gas can be in step-down, temperature dropped to low, and do not meet the gas transmission standard of gas distributing system, improve the Security of the rock gas of output, guarantee the safety of life and production usefulness gas;
The emergency cut-off valve and the sniffer that are provided with control system and are connected in the pipe-line system of main pressure regulator of the present utility model system with this control system circuit, pressing in the pressure-regulating box in sniffer detects has the situation of gas leakage and is transferred to control system, then control system control emergency cut-off valve is closed, the pipeline of main pressure regulator system is cut off, make the pipeline of main pressure regulator system no longer reveal rock gas, press pressure-regulating box and peripheral device trouble free service thereof in the assurance, guarantee staff's life safety simultaneously;
The utility model is provided with safety valve; this safety valve suitably is adjusted to particular switch pressure; when the air pressure in the pipeline after the pressure regulation is too high; can emit an amount of rock gas; being lower than when pressure behind the switch open pressure of safety valve is that safety valve cuts out automatically; safety valve guarantees in the pipeline that rock gas air pressure can be not too high and low-level device is caused damage, and each parts and level system down in the protective system are pressed the operating life of pressure-regulating box and air supply system in the prolongation.
Description of drawings
Fig. 1 is the structural representation of the middle pressure pressure-regulating box of the utility model compressed natural gas supply station.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model.
The utility model has illustrated a kind of middle pressure pressure-regulating box of compressed natural gas supply station, and the middle pressure pressure-regulating box of this compressed natural gas supply station is arranged in the natural gas supply station of various places.Be provided with in the natural gas supply station and unload pneumatic module 3, this unloads pneumatic module 3 and comprises any a plurality of discharge column, and these several discharge columns can be connected by high pressure hose with extraordinary transport vehicle compressed natural gas gas tank, can satisfy some extraordinary transport vehicles simultaneously and unload gas.
As shown in Figure 1, the middle pressure pressure-regulating box of compressed natural gas supply station comprises two parallel main pressure regulator systems 1 that connect, and a bypass voltage-regulating system 2.Be provided with some sniffers (this sniffer comprises barometer, thermometer and gas leakage probe etc.) in the pipeline of main pressure regulator system 1 and bypass voltage-regulating system 2, press the external control system 4 of pressure-regulating box in this, this control system 4 is connected with the sniffer circuit.The suction port of these two main pressure regulator systems 1 and bypass voltage-regulating system 2 all with supply station in the pneumatic module 3 of unloading be connected by pipeline, all rock gas can be inputed to middle the pressure in the pressure-regulating box by any discharge column that unloads in the pneumatic module 3, pipeline in the middle pressure pressure-regulating box adopts carbon material to make, and all the other are used for supporting presses the Steel Support and the metal parts of pressure-regulating box all to brush two at two ends of grey rust proof paint.Simultaneously, the air outlet of two main pressure regulator systems 1 and bypass voltage-regulating system 2 all is connected gas distributing system in the supply station by pipeline, and is transferred to the gas conservation module of subordinate.
Each main pressure regulator system 1 comprises by pipeline and is connected main pressure regulator parts 11 between the pipe network that unloads pneumatic module 3 and supply station.At main pressure regulator parts 11 and unload between the pneumatic module 33 of self-unloading pneumatic modules, also be provided with heating equipment 5, pressure transducer 12, main road ball valve 13, filter 14, emergency cut-off valve 15 and excess pressure cutout valve 16 successively.Wherein, heating equipment 5 adopts the heating tape to be wrapped on the pipeline of input main pressure regulator system 1, and it connects a power supply, and energising i.e. heating.Main road ball valve 13 adopts manual ball valve.Pressure transducer 12 is used for detecting the air pressure of rock gas of the pressure pressure-regulating box of input compressed natural gas supply station, and the gas pressure of its minimum conversion limit value is made as 0.6 MPa.The upper pressure limit of excess pressure cutout valve 16 is made as 4 MPas, then can trigger excess pressure cutout valve 16 and cuts off gas circuits when the rock gas air pressure of process surpasses 4 MPas.Emergency cut-off valve 15 adopts the solenoid valve ball valve, the output terminal of its circuit connection control system 4, in the casing of middle pressure pressure-regulating box, be provided with a gas leakage probe, the input end of this gas leakage probe circuit connection control system 4, whether have gas leak phenomenon in pressure pressure-regulating box take place, and the signal that will leak gas transfers to control system 4 if being used for detection.Between heating equipment 5 and main road ball valve 13, also be provided with two barometers, the input end of one of them barometer circuit connection control system 4, rock gas air pressure is transferred to 4, two barometers of control system to be implemented in control system 4 places or working site and all can be in real time the air pressure of the rock gas of input main pressure regulator system 1 to be monitored.
After main pressure regulator parts 11 were arranged on excess pressure cutout valve 16, main pressure regulator parts 11 can be depressured to the rock gas of 4 MPas 0.3 MPa in the present embodiment.Be provided with a butterfly valve behind main pressure regulator parts 11, this butterfly valve is normal opening butterfly valve, can close butterfly valve when not using this device.
Bypass voltage-regulating system 2 comprises by pipeline and is connected bypass voltage regulation part 21 between the pipe network that unloads pneumatic module 3 and supply station.Bypass voltage regulation part 21 with unload on the pipeline of pneumatic module 3,3 of self-unloading pneumatic modules are provided with a barometer successively, release valve ball 22 from bypass voltage regulation part 21, is provided with a barometer and a stop valve at the delivery outlet of bypass voltage regulation part 21 successively.Wherein release valve ball 22 adopts manual ball valve, bypass voltage regulation part 21 can be with rock gas pressure regulation to 0.3 MPa of 0.6 MPa, and be separately positioned on two barometers of bypass voltage regulation part 21 front and back, can make respectively operator at the scene to before the pressure regulation with pressure regulation after rock gas air pressure monitor.
Between the delivery outlet and supply station pipe network of main pressure regulator system 1 and bypass voltage-regulating system 2, the delivery outlet of autonomous voltage-regulating system 1 and bypass voltage-regulating system 2 rises, and is provided with safety valve 17, two thermometers, two barometers and a stop valve successively.Wherein thermometer in two thermometers all is connected with control system 4 by circuit with a barometer in two barometers, be implemented in control system 4 with on-the-spot all can the temperature of rock gas is gentle compresses into row monitoring in real time to pressing in the process after the pressure-regulating box pressure regulation.Above-mentioned safety valve 17 upper pipelines connect an outlet pipe, the high-altitude is led in the outlet of this outlet pipe, the switch pressure of safety valve 17 is made as 0.45 MPa, the air pressure of rock gas is too high after pressing the pressure-regulating box pressure regulation in the process, surpass 0.45 MPa of setting, rock gas can open the safety-valve 17, an amount of rock gas is discharged to the high-altitude by outlet pipe, after discharging a certain amount of rock gas, the air pressure of rock gas is reduced to 0.45 MPa, safety valve 17 promptly cuts out, and rock gas can export the supply station pipe network to by safety valve 17.
Below specify the pressure regulation air feed flow process of the middle pressure pressure-regulating box of the utility model compressed natural gas supply station:
Some transport vehicles of step 1 connect by high pressure hose with any discharge column that unloads under the pneumatic module 3.After being tightly connected between gas tank that guarantees transport vehicle and the discharge column, transport vehicle is pressed pressure-regulating box during the compressed natural gas in its gas tank is imported by any discharge column that unloads pneumatic module 3 respectively.Pressure transducer 12 detects the air pressure of the compressed natural gas of the middle pressure pressure-regulating box of importing the compressed natural gas supply station in real time, if the compressed natural gas pressure by air pressure is higher than 0.6 MPa, during minimum conversion limit value that the air pressure of compressed natural gas air feed is higher than that pressure transducer 12 sets, then jump to step 2, if compressed natural gas air pressure is less than 0.6 MPa, during minimum conversion limit value that the air pressure of compressed natural gas air feed is lower than that pressure transducer 12 sets, then jump to step 5.
Step 2 main road ball valve 13 is opened, and release valve ball 22 cuts out simultaneously, and the compressed natural gas that unloads in the pneumatic module 3 enters each main pressure regulator system 1 with being evenly distributed.Being arranged on the air delivering pipeline that 5 pairs of heating equipments unloading between pneumatic module 3 and the main pressure regulator system 1 unload between pneumatic module 3 and the main pressure regulator system 1 simultaneously heats, the rock gas of input main pressure regulator system 1 is preheated, guaranteeing can low excessively (not being lower than-10 ℃) through the temperature of the rock gas after the pressure regulation, makes rock gas meet the standard of national gas distributing system system.
1 pair of rock gas of step 3 main pressure regulator system carries out pretreatment.
14 pairs of compressed natural gass of step 3.1 filter filter, and iron filings in the removal rock gas and wet goods swim in the impurity in the rock gas.
Step 3.2 gas leakage probe centering is pressed in the pressure-regulating box and is carried out real-time detection, and detected signal is transferred to control system 4, and control system 4 judges according to the rock gas data that the gas leakage probe detection obtains whether pipeline leaks gas, if, then jump to step 3.2.1, if not, then jump to step 3.3.
Step 3.2.1 control system 4 is sent SC sigmal control emergency cut-off valve 15 and is closed gas circuit, prevents that a large amount of compressed natural gass from leaking in the working environment.
Step 3.2.2 staff then checks the pipeline of main pressure regulator system 1 after control system 4 receives gas leakage alarm, finds that the pipeline to main pressure regulator system 1 keeps in repair behind the leaking source, jumps to step 3.2 after the maintenance.
Step 3.3 compressed natural gas transfers to excess pressure cutout valve 16, if rock gas air pressure is too high, excess pressure cutout valve 16 cuts off gas circuit, stops compressed natural gas being carried out pressure regulation.If rock gas air pressure is not too high, excess pressure cutout valve 16 is held open, and jumps to step 4.
Rock gas through 11 pressure regulation of main pressure regulator assembly transfers to safety valve 17 by butterfly valve and the pipeline of often opening, if rock gas air pressure is too high, surpass 0.45 MPa, then rock gas backs down safety valve 17 automatically, an amount of rock gas is discharged to the high-altitude by outlet pipe, after discharging a certain amount of rock gas, the air pressure of rock gas drops to normal pressure.Rock gas can't open the safety-valve 17 when being lower than 0.45 MPa, and safety valve 17 promptly cuts out automatically.If rock gas air pressure is normally not too high, be lower than 0.45 MPa rock gas and can't open the safety-valve 17, then safety valve 17 keeps hermetically closing not discharge rock gas.
Rock gas successively by two thermometers and two barometers, just transfers to the supply station pipe network again through behind the safety valve 17.The performance of thermometer and air pressure shows the temperature and the air pressure of rock gas after the pressure regulation, and simultaneously with information transmission to control system 4, press the working state of pressure-regulating box in real time in the monitoring.
21 pairs of rock gases of step 6 bypass pressure regulation assembly carry out the air pressure adjustment, and the rock gas that air pressure is lower is depressured to 0.3 MPa by 0.6 MPa.
Rock gas through 21 pressure regulation of bypass pressure regulation assembly transfers to safety valve 17 by butterfly valve and the pipeline of often opening, if rock gas air pressure is too high, surpass 0.45 MPa, then rock gas backs down safety valve 17 automatically, an amount of rock gas is discharged to the high-altitude by outlet pipe, after discharging a certain amount of rock gas, the air pressure of rock gas drops to normal pressure.Rock gas can't open the safety-valve 17 when being lower than 0.45 MPa, and safety valve 17 promptly cuts out automatically.If rock gas air pressure is normally not too high, be lower than 0.45 MPa rock gas and can't open the safety-valve 17, then safety valve 17 keeps hermetically closing not discharge rock gas.
Rock gas successively by two thermometers and two barometers, just transfers in the supply station pipe network through behind the safety valve 17 again.The performance of thermometer and air pressure shows the temperature and the air pressure of rock gas after the pressure regulation, and simultaneously with information transmission to control system 4, press the working state of pressure-regulating box in real time in the monitoring.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be conspicuous.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (7)
1. the middle pressure pressure-regulating box of a compressed natural gas supply station is characterized in that, this pressure-regulating box comprises some the parallel main pressure regulator systems (1) that connect, and some the parallel bypass voltage-regulating systems (2) that connect;
The suction port pipeline of described main pressure regulator system (1) and bypass voltage-regulating system (2) is connected the external pneumatic module (3) that unloads; Described main pressure regulator system (1) is connected the pipe network of supply station with the air outlet pipeline of bypass voltage-regulating system (2);
Described main pressure regulator system (1) comprises by pipeline and is connected main pressure regulator parts (11) between the described pipe network that unloads pneumatic module (3) and supply station;
Described bypass voltage-regulating system (2) comprises by pipeline and is connected bypass voltage regulation part (21) between the described pipe network that unloads pneumatic module (3) and supply station.
2. the middle pressure pressure-regulating box of compressed natural gas supply station as claimed in claim 1, it is characterized in that, described main pressure regulator parts (11) and described unloading between the pneumatic module (3), self-unloading pneumatic module (3) rises, and also is provided with pressure transducer (12), main road ball valve (13), filter (14), emergency cut-off valve (15) and excess pressure cutout valve (16) successively.
3. the middle pressure pressure-regulating box of compressed natural gas supply station as claimed in claim 1 is characterized in that, described main pressure regulator parts (11) comprise the pressure governor that some levels are connected in series.
4. the middle pressure pressure-regulating box of compressed natural gas supply station as claimed in claim 1 is characterized in that, also is provided with safety valve (17) between the air outlet of described main pressure regulator system (1) and bypass voltage-regulating system (2) and the pipe network of supply station.
5. the middle pressure pressure-regulating box of compressed natural gas supply station as claimed in claim 1 is characterized in that, described bypass voltage regulation part (21) and unload and also be provided with release valve ball (22) between the pneumatic module (3).
6. the middle pressure pressure-regulating box of compressed natural gas supply station as claimed in claim 1, it is characterized in that, the pipeline of described main pressure regulator system (1) and bypass voltage-regulating system (2) is provided with some sniffers, and these several sniffer circuit connect the input end of outside control system (4); The circuit of output terminal of described control system (4) connects described emergency cut-off valve (15).
7. the middle pressure pressure-regulating box of compressed natural gas supply station as claimed in claim 1 is characterized in that, described main pressure regulator system (1) and unload on the pipeline between the pneumatic module (3) and also be provided with heating equipment (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200112723U CN201973452U (en) | 2011-01-14 | 2011-01-14 | Medium pressure regulating box for compressed natural gas supply station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200112723U CN201973452U (en) | 2011-01-14 | 2011-01-14 | Medium pressure regulating box for compressed natural gas supply station |
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| Publication Number | Publication Date |
|---|---|
| CN201973452U true CN201973452U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200112723U Expired - Lifetime CN201973452U (en) | 2011-01-14 | 2011-01-14 | Medium pressure regulating box for compressed natural gas supply station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201973452U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155621A (en) * | 2011-01-14 | 2011-08-17 | 上海万事红燃气技术发展有限公司 | Medium pressure regulating box in compressed natural gas supplying station and pressure regulating and gas supplying method thereof |
| CN103104811A (en) * | 2013-01-16 | 2013-05-15 | 东莞新奥燃气有限公司 | Pressure-regulating air-feeding method of natural gas pipeline network |
| CN103174936A (en) * | 2011-12-20 | 2013-06-26 | 大阳日酸株式会社 | Apparatus and method for supplying liquefied gas |
-
2011
- 2011-01-14 CN CN2011200112723U patent/CN201973452U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155621A (en) * | 2011-01-14 | 2011-08-17 | 上海万事红燃气技术发展有限公司 | Medium pressure regulating box in compressed natural gas supplying station and pressure regulating and gas supplying method thereof |
| CN103174936A (en) * | 2011-12-20 | 2013-06-26 | 大阳日酸株式会社 | Apparatus and method for supplying liquefied gas |
| CN103174936B (en) * | 2011-12-20 | 2016-08-24 | 大阳日酸株式会社 | Liquefied gas feedway and method |
| CN103104811A (en) * | 2013-01-16 | 2013-05-15 | 东莞新奥燃气有限公司 | Pressure-regulating air-feeding method of natural gas pipeline network |
| CN103104811B (en) * | 2013-01-16 | 2015-11-18 | 东莞新奥燃气有限公司 | A kind of pressure regulation air supply method of gas distributing system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110914 |