CN104554689B - A kind of method to landing stage supply natural gas - Google Patents
A kind of method to landing stage supply natural gas Download PDFInfo
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- CN104554689B CN104554689B CN201510055324.XA CN201510055324A CN104554689B CN 104554689 B CN104554689 B CN 104554689B CN 201510055324 A CN201510055324 A CN 201510055324A CN 104554689 B CN104554689 B CN 104554689B
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Abstract
The present invention relates to a kind of method to landing stage supply natural gas, mensuration river surface peak level in flood season and landing stage drift out the maximum distance on bank, it is higher than at peak level on river bank again and pressure adjusting metering cabinet is installed, it is the low-pressure fuel gas needed for landing stage by middle pressure gas pressure regulating, pass through controller for gas and landing stage special-purpose metal air supply hose again by fuel gas transmission to landing stage, wherein special-purpose metal air supply hose in landing stage has body and is tightly combined, and uses softness, the advantage deforming circumnutating property little, resistance under stress.Overcome the most bent property of common conveying steel pipe, overcome the shortcoming that tradition delivery hose air demand is not enough, anti-pressure ability is bad simultaneously.In addition, it is respectively mounted emergency separating device at the two ends of landing stage special-purpose metal air supply hose, so when being impacted in flood season or landing stage, after surprisingly being broken regardless of the landing stage special-purpose metal air supply hose of any end, emergency separating device just quick closure valve, thus prevent from causing the potential safety hazard such as fire, blast because of natural gas leaking.
Description
Technical field
The present invention relates to natural gas supply method, particularly relate to a kind of method to landing stage supply natural gas.
Background technology
Landing stage (d ǔ n chu á n) is the rectangle flatboat of unpowered device, is typically secured to bank, is initially only used as floating wharf and uses, for handling goods or upper and lower for pedestrian, after along with the development in epoch, the raising of people's quality of the life, gradually amusement on water is increasingly made earnest efforts.Based on so, landing stage uses used also as business, amusement etc..
At present, most landing stage is designed with the restaurant for people's food and drink.Owing to landing stage swims on rivers, if directly connect natural gas line from land for the gas supply in kitchen, restaurant on landing stage, existing problem is, natural gas line typically uses steel pipe, to ensure the air-tightness of body, rigidity and robustness, thus avoid gases did escape phenomenon.If but running into flood season, river surface raises, and landing stage is subjected to displacement change the most therewith, and owing to steel pipe quality is hard, the place that natural gas line is connected with landing stage will occur crack, thus causes the problem that gas leaks.And if use flexible pipe conveying natural-gas, owing to caliber is little, tube wall is thin, it is impossible to bear the pressure of combustion gas in pipe, and the gas consumption on landing stage can not be met.
Liquefied petroleum gas is used to supply so the most general, but it is far from being enough for meeting up to 2,000 people diet consumption amount all day for the liquefied petroleum gas of a tank net weight 13kg, so needing when in use ceaselessly to change Gas Pipe, problem existing for this mode is, if being in the cooking stage when dying, the mouthfeel of vegetable can be affected, thus affect the sales volume of businessman；And owing to liquefied petroleum gas belongs to explosive material, be difficult to Jiang Qitun and be placed on landing stage, so needing a few tank liquefied petroleum gas of carrying artificial every day to landing stage, liquid gas storage tank being moved down after being finished ship again and goes to be replaced, this mode complex operation and labor intensive.The calorific value that can be generated by after the liquefied petroleum gas combustion of one tank net weight 13kg, only with 16m3After combustion of natural gas, produced calorific value is suitable.One tank liquefied petroleum gas price is typically at about 90 yuan, and natural gas is by Chongqing region business 2.96 yuan/m of gas price lattice3Calculate, 16m3Gas Prices only needs about 50 yuan.So from the point of view of in price, the cost of liquefied petroleum gas significantly larger than gasifies gas cost.So based on disadvantage mentioned above, what operation commercial city, each landing stage was urgent wants to find a kind of energy directly to the method for landing stage supply natural gas.
Summary of the invention
It is an object of the invention to provide a kind of method to landing stage supply natural gas, with the problem solving to supply natural gas on landing stage in prior art.
In order to solve above-mentioned technical problem, the present invention provides a kind of method to landing stage supply natural gas, and the step of described method includes:
Step 1: when setting river surface flood season, landing stage drifts out the maximum distance L rice on bank；
Step 2: set river surface peak level in flood season H rice；
Step 3: higher than water level (H+ H1) bury middle pressure steel gas pipe underground, and the reserved combustion gas input end interface with gas pressure adjusting metering cabinet, wherein H underground on river bank at rice1>=20 meters, the design pressure of middle pressure steel gas pipe underground is 0.4MPa；
Step 4: the pre-buried low pressure steel gas pipe underground to landing stage supply on river bank, and the reserved interface with pressure adjusting metering cabinet combustion gas outfan, the design pressure of its mesolow steel gas pipe underground is 10KPa；
Step 5: higher than water level (H+ H1) pressure adjusting metering cabinet is installed on river bank at rice, and set pressure adjusting metering cabinet to the output pressure of low-pressure line output combustion gas as 2.2KPa-2.8KPa；
Step 6: the spare interface of the combustion gas input of pressure adjusting metering cabinet with middle pressure steel gas pipe underground is connected, and the combustion gas outfan of pressure adjusting metering cabinet is connected with the spare interface of low pressure steel gas pipe underground；
Step 7: the gas transmission terminal at low pressure steel gas pipe underground installs controller for gas, is reserved with landing stage air supply opening, sets the controller for gas distance away from water bank as T rice in described controller for gas；
Step 8: one end that landing stage special-purpose metal air supply hose is provided with emergency separating device is arranged on the landing stage air supply opening described in step 7, wherein the resistance to pressure pressure of landing stage special-purpose metal air supply hose is 8MPa, operating temperature is-30 DEG C to 100 DEG C, its length is more than (T+L) rice, a diameter of 50mm to 200mm of landing stage special-purpose metal air supply hose；
Step 9: according to national standard CJJ94-2009 on landing stage, combustion gas steam line and various security system in design and installation ship, and reserved connect QI KOU with landing stage special-purpose metal air supply hose communicates；
Step 10: what the hose coupling of the landing stage special-purpose metal air supply hose other end was arranged on the reserved landing stage special-purpose metal air supply hose of step 9 communicates connects in QI KOU；
Step 11: open the steam supply valve of pressure adjusting metering cabinet and the control valve of controller for gas, can realize supplying purpose to landing stage.
Use technique scheme, by by from press dry and after the natural gas via pressure adjusting metering cabinet of line carries out pressure regulation, obtain natural gas needed for landing stage.Natural gas after pressure regulation is input in low pressure steel gas pipe underground.It is to be connected by landing stage special-purpose metal air supply hose between low pressure steel gas pipe underground and landing stage, and landing stage special-purpose metal air supply hose has body and is tightly combined, and uses softness, deforms circumnutating property little, resistance to and the advantage of fatigue durability under stress.So landing stage special-purpose metal air supply hose overcomes the most bent property of common conveying steel pipe, overcome the shortcoming that tradition delivery hose air demand is not enough, anti-pressure ability is bad simultaneously.By using landing stage special-purpose metal air supply hose to landing stage and the connection of natural gas in control system, just enter landing stage without the weigh LPG cyoinders (the liquefied petroleum gas additional 13kg fuel cartridge of net weight 13kg) of 26kg of carrying again, decrease human cost.On the other hand analyze from price, owing to pipe natural gas price is well below liquefied petroleum gas, so this method will be substantially reduced the cost to landing stage supply natural gas.
Further, the structure of the landing stage special-purpose metal air supply hose described in step 8, step 9, step 10 is as follows: it includes that metal hose body, metal hose body two ends are provided with hose coupling, the two ends of described metal hose body are respectively embedded in hose coupling, wherein the hose coupling of one end has emergency separating device by Flange joint, and described emergency separating device is tightly connected with the landing stage air supply opening described in step 7 by flange；The hose coupling of the other end is tightly connected with the QI KOU that connects described in step 9 by flange.There is flange at emergency separating device two ends, realize landing stage special-purpose metal air supply hose by flange to turn on steam line, can realize artificially dismantling, special-purpose metal air supply hose two ends, landing stage are respectively embedded into hose coupling, this avoid coming off of hose coupling, emergency separating device can be when emergency case occurs, emergency separating device is forced to disconnect, two parts emergency separating device disconnected is capable of the sealing of respective pipeline, prevent the leakage of natural gas, owing to using landing stage special-purpose metal air supply hose as steam line, landing stage special-purpose metal air supply hose has pliability, can adapt to landing stage normal displacement on the water surface.
Further, for avoiding middle pressure steel gas pipe underground and low pressure steel gas pipe underground to be damaged, when pressing steel gas pipe underground and low pressure steel gas pipe underground to be embedded in below driveway in step 3 and step 4, the depth of burying is 0.9m, when being embedded in below non-driveway, the depth of burying is 0.6m.
Further, in order to support landing stage special-purpose metal air supply hose, it is to avoid it is immersed in river, to extend its service life, between landing stage and river bank, a landing stage special-purpose metal air supply hose pontoon is set at interval of 1 meter.
Further, in order to prevent controller for gas by Exposure to Sunlight, drench with rain, being additionally provided with combustion gas switch board cover on the controller for gas of the present invention, the structure of described combustion gas switch board cover is as follows: it includes cabinet and is arranged at the installation pedestal below cabinet, and cabinet is threadedly attached on installation pedestal；It is provided with, on described cabinet front and rear wall, the through hole matched with controller for gas supply air line, it is provided with controller for gas supply air line positioning chamber with at through hole opposite position on described installation pedestal, being provided with in described positioning chamber and the i shaped steel of supply air line form fit, described i shaped steel is threadedly attached on installation pedestal.So, on the one hand ensure that stablizing of controller for gas, on the other hand avoid the pollution to rivers.
Further, in order to avoid the thunder and lightning destruction to pressure adjusting metering cabinet, and the impact that electrostatic is on it, in steps of 5, lightning protection device, anti-static grounding measure, and its earth resistance are cashier's office in a shop installed less than 10 ohm at pressure regulation metering.
Further, described landing stage special-purpose metal air supply hose is enclosed with anti-ultraviolet material, to avoid ultraviolet that landing stage special-purpose metal air supply hose is caused corrosion phenomenon.
Detailed description of the invention
The technical program provides a kind of method to landing stage supply natural gas, and the step of described method includes:
Step 1: when assuming river surface flood season, landing stage drifts out the maximum distance on bank is 50 meters；
Step 2: assume to measure river surface peak level in flood season 180 meters；
Step 3: so higher than burying middle pressure steel gas pipe underground on the river bank at water level 200 meters underground, and the reserved interface with gas pressure adjusting metering cabinet, the design pressure of middle pressure steel gas pipe underground is 0.4MPa；
Step 4 is the pre-buried low pressure steel gas pipe underground to landing stage supply on river bank, and the reserved interface with pressure adjusting metering cabinet, and the design pressure of its mesolow steel gas pipe underground is 10KPa；
When pressing steel gas pipe underground and low pressure steel gas pipe underground to be embedded in below driveway in handle, its depth of burying is 0.9m, and when being embedded in below non-driveway, the depth of burying is 0.6m.When middle pressure steel gas pipe underground and low pressure steel gas pipe underground pass in drain pipe, thermal pipe and other various uses grooves, should middle pressure steel gas pipe underground and low pressure steel gas pipe underground be laid in sleeve pipe, sleeve pipe stretches out component beyond the region of objective existence wall and is no less than 6.3.3-1 gas pipeline and the net level length of construction in specification GB50028-2006.Sleeve pipe two ends should use flexible corrosion protection, waterproof material to seal.
When the middle pressure steel gas pipe underground and low pressure steel gas pipe underground being embedded in ground is carried out soldered, it is necessary to carry out 100% radiographic examination (complete) and ultrasonic inspection.Radiographic examination (complete) must not be less than the II level prescription in existing national standards GB-T 12605；Ultrasonic inspection must not be less than the I level prescription in existing national standards GB 11345.
Step 5: higher than installing pressure adjusting metering cabinet on the river bank at water level 200 meters, and set the output pressure to low-pressure line output combustion gas of pressure adjusting metering cabinet as 2.5KPa；This pressure adjusting metering cabinet has " Changzhou letter power " producer that finished product is fabricated separately, and its model is RB4700 series, during installation, cashier's office in a shop installs lightning protection device, anti-static grounding measure, and its earth resistance less than 10 ohm at pressure regulation metering.
Step 6: the spare interface of the combustion gas input of pressure adjusting metering cabinet with middle pressure steel gas pipe underground is connected, and the combustion gas outfan of pressure adjusting metering cabinet is connected with the spare interface of low pressure steel gas pipe underground；
Step 7: the gas transmission terminal at low pressure steel gas pipe underground installs controller for gas, is reserved with landing stage air supply opening in described controller for gas, measuring the controller for gas distance away from water bank is 20 meters；Preferably, in order to avoid the time in flood season, under the impact of river, controller for gas is washed from home position and enters in the body of river, described controller for gas arranges combustion gas switch board cover, described combustion gas switch board cover includes cabinet and is arranged at the installation pedestal below cabinet, and cabinet is threadedly attached on installation pedestal；It is provided with, on described cabinet front and rear wall, the through hole matched with controller for gas supply air line, install and be provided with controller for gas supply air line positioning chamber at through hole opposite position on pedestal, being provided with in described positioning chamber and the i shaped steel of supply air line form fit, described i shaped steel is threadedly attached on installation pedestal.
Step 8: special-purpose metal air supply hose one end, landing stage is arranged on the landing stage air supply opening described in step 7, wherein the resistance to pressure pressure of landing stage special-purpose metal air supply hose is 8MPa, operating temperature is-30 DEG C to 100 DEG C, and its length is more than 70 meters, a diameter of 100mm of landing stage special-purpose metal air supply hose.In order to support landing stage special-purpose metal air supply hose, it is to avoid it is immersed in river, to extend its service life, between landing stage and river bank, a landing stage special-purpose metal air supply hose pontoon is set at interval of 1 meter.Owing to the caliber of landing stage special-purpose metal air supply hose its flexibility the biggest is the poorest, so for the flexibility meeting landing stage special-purpose metal air supply hose, so that it can change with the fluctuating of river surface, the landing stage the to be met demand to natural gas, so the landing stage special-purpose metal air supply hose using at least two internal diameters to be 100mm, it is separately mounted in the control valve on controller for gas.Landing stage its operating pressure of special-purpose metal air supply hose of this internal diameter is 8Mpa, and burst pressure is 12Mpa, and minimum bending radius is 630mm.
Generally, two internal diameters are that the landing stage special-purpose metal air supply hose of 100mm supplies the demand having met landing stage to combustion gas to landing stage, but in order to meet demand increasing to combustion gas after landing stage expansion scale, so arranging 3 blowing mouths and connecting with landing stage special-purpose metal air supply hose.
The structure of landing stage special-purpose metal air supply hose is as follows: it includes that metal hose body, metal hose body two ends are provided with hose coupling, the two ends of described metal hose body are respectively embedded in hose coupling, wherein the hose coupling of one end has emergency separating device by Flange joint, and described emergency separating device is tightly connected with the landing stage air supply opening described in step 7 by flange；The hose coupling of the other end is tightly connected with the QI KOU that connects described in step 9 by flange.Emergency separating device can be when emergency case occurs, emergency separating device is forced to disconnect, two parts emergency separating device disconnected is capable of the sealing of respective pipeline, prevent the leakage of natural gas, using landing stage special-purpose metal air supply hose as gas station and the steam line on landing stage, landing stage special-purpose metal air supply hose has pliability, it is possible to adapt to landing stage normal displacement on the water surface.
Step 9: according to national standard CJJ94-2009 on landing stage, combustion gas steam line and various security system in design and installation ship, and reserved connect QI KOU with landing stage special-purpose metal air supply hose communicates；
Step 10: what the landing stage special-purpose metal air supply hose other end was arranged on the reserved landing stage special-purpose metal air supply hose of step 9 communicates connects in QI KOU；
Step 11: open the steam supply valve of pressure adjusting metering cabinet and the control valve of controller for gas, can realize supplying purpose to landing stage.
Originally state in technical scheme, by measuring the peak level of river surface in flood season, pressure adjusting metering cabinet is arranged at higher than the river bank of peak level, to ensure that pressure adjusting metering cabinet is not inundated with flood.Middle pressure gas pressure regulating is the low-pressure fuel gas needed for landing stage by recycling pressure adjusting metering cabinet, by controller for gas and landing stage special-purpose metal air supply hose by fuel gas transmission to landing stage.By measuring the maximum distance that landing stage drifted out when flood season, first choose the length of landing stage special-purpose metal air supply hose, to avoid the landing stage special-purpose metal air supply hose when flood season to be pulled off.In addition, it is respectively mounted an emergency separating device on junction with landing stage special-purpose metal air supply hose at controller for gas and landing stage, even if landing stage special-purpose metal air supply hose is by after unexpected breaking, emergency separating device just automatic quickly closure valve, thus prevent the potential safety hazards such as the fire, the blast that cause because of natural gas leaking.
Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; on the premise of without departing from present configuration; some deformation and improvement can also be made; these also should be considered as protection scope of the present invention, and these are all without affecting effect and the practical applicability that the present invention implements.
Claims (7)
1. the method to landing stage supply natural gas, it is characterised in that the step of described method includes:
Step 1: when setting river surface flood season, landing stage drifts out the maximum distance L rice on bank；
Step 2: set river surface peak level in flood season H rice；
Step 3: higher than water level (H+ H1) bury middle pressure steel gas pipe underground, and the reserved combustion gas input end interface with gas pressure adjusting metering cabinet, wherein H underground on river bank at rice1>=20 meters, the design pressure of middle pressure steel gas pipe underground is 0.4MPa；
Step 4: the pre-buried low pressure steel gas pipe underground to landing stage supply on river bank, and the reserved interface with pressure adjusting metering cabinet combustion gas outfan, the design pressure of its mesolow steel gas pipe underground is 10KPa；
Step 5: higher than water level (H+ H1) pressure adjusting metering cabinet is installed on river bank at rice, and set pressure adjusting metering cabinet to the output pressure of low-pressure line output combustion gas as 2.2KPa-2.8KPa；
Step 6: the spare interface of the combustion gas input of pressure adjusting metering cabinet with middle pressure steel gas pipe underground is connected, and the combustion gas outfan of pressure adjusting metering cabinet is connected with the spare interface of low pressure steel gas pipe underground；
Step 7: the gas transmission terminal at low pressure steel gas pipe underground installs controller for gas, is reserved with landing stage air supply opening, sets the controller for gas distance away from water bank as T rice in described controller for gas；
Step 8: one end that landing stage special-purpose metal air supply hose is provided with emergency separating device is arranged on the landing stage air supply opening described in step 7, wherein the resistance to pressure pressure of landing stage special-purpose metal air supply hose is 8MPa, operating temperature is-30 DEG C to 100 DEG C, its length is more than (T+L) rice, a diameter of 50mm to 200mm of landing stage special-purpose metal air supply hose；
Step 9: according to national standard CJJ94-2009 on landing stage, combustion gas steam line and various security system in design and installation ship, and reserved connect QI KOU with landing stage special-purpose metal air supply hose communicates；
Step 10: what the hose coupling of the landing stage special-purpose metal air supply hose other end was arranged on the reserved landing stage special-purpose metal air supply hose of step 9 communicates connects in QI KOU；
Step 11: open the steam supply valve of pressure adjusting metering cabinet and the control valve of controller for gas, can realize supplying purpose to landing stage.
Method to landing stage supply natural gas the most according to claim 1, it is characterized in that: the structure of the landing stage special-purpose metal air supply hose described in step 8, step 9, step 10 is as follows: it includes that metal hose body, metal hose body two ends are provided with hose coupling, the two ends of described metal hose body are respectively embedded in hose coupling, wherein the hose coupling of one end has emergency separating device by Flange joint, and described emergency separating device is tightly connected with the landing stage air supply opening described in step 7 by flange；The hose coupling of the other end is tightly connected with the QI KOU that connects described in step 9 by flange.
Method to landing stage supply natural gas the most according to claim 1, it is characterized in that, when pressing steel gas pipe underground and low pressure steel gas pipe underground to be embedded in below driveway in step 3 and step 4, the depth of burying is 0.9m, when being embedded in below non-driveway, the depth of burying is 0.6m.
Method to landing stage supply natural gas the most according to claim 2, it is characterised in that step 10 also includes: arrange a landing stage special-purpose metal air supply hose pontoon at interval of 1 meter between landing stage and river bank.
Method to landing stage supply natural gas the most according to claim 1, it is characterized in that, step 7 also includes: combustion gas switch board cover is set on described controller for gas, the structure of described combustion gas switch board cover is as follows: it includes cabinet and is arranged at the installation pedestal below cabinet, and cabinet is threadedly attached on installation pedestal；It is provided with, on described cabinet front and rear wall, the through hole matched with controller for gas supply air line, it is provided with controller for gas supply air line positioning chamber with at through hole opposite position on described installation pedestal, being provided with in described positioning chamber and the i shaped steel of supply air line form fit, described i shaped steel is threadedly attached on installation pedestal.
Method to landing stage supply natural gas the most according to claim 1, it is characterised in that cashier's office in a shop install lightning protection device, anti-static grounding measure, and its earth resistance less than 10 ohm at pressure regulation metering.
Method to landing stage supply natural gas the most according to claim 1, it is characterised in that be enclosed with anti-ultraviolet material on the special-purpose metal air supply hose of described landing stage.
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| CN201510055324.XA CN104554689B (en) | 2015-02-03 | 2015-02-03 | A kind of method to landing stage supply natural gas |
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| CN201510055324.XA CN104554689B (en) | 2015-02-03 | 2015-02-03 | A kind of method to landing stage supply natural gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020073619A1 (en) * | 2000-12-14 | 2002-06-20 | William Perkins | Method and apparatus for delivering natural gas to remote locations |
| GB2399320A (en) * | 2003-03-10 | 2004-09-15 | Malcolm Newell | Semi-submersible jetty for transferring LNG from a production vessel to a transport vessel |
| FR2902411B1 (en) * | 2006-06-19 | 2011-02-25 | Technip France | DEVICE FOR TRANSFERRING A FLUID TO A VESSEL, ASSEMBLY AND TRANSFER METHOD THEREOF |
| CN201014196Y (en) * | 2007-03-05 | 2008-01-30 | 上海燃气工程设计研究有限公司 | Gas supply pipeline for floating refectory above water |
| FR2920753B1 (en) * | 2007-09-12 | 2010-11-19 | Technip France | INSTALLATION FOR TRANSFERRING A FLUID BETWEEN A TRANSPORT SHIP AND A FIXED STRUCTURE |
| FR2945024A1 (en) * | 2009-04-30 | 2010-11-05 | Eurodim Sa | ARRANGEMENT FOR TRANSFERRING A FLUID TO A SHIP AND A SYSTEM FOR TRANSFERRING A FLUID BETWEEN TWO SHIPS, ONE OF WHICH IS EQUIPPED WITH AN ARRANGEMENT ACCORDING TO THE INVENTION |
| FR2973771B1 (en) * | 2011-04-11 | 2015-07-17 | Fmc Technologies Sa | SYSTEM AND METHOD FOR OFFSHORE FLUID TRANSFER |
| EP2704945B1 (en) * | 2011-05-06 | 2017-10-25 | National Oilwell Varco Denmark I/S | An offshore system |
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