CN105485513A - Built-in pump LNG (liquefied natural gas) storage tank - Google Patents
Built-in pump LNG (liquefied natural gas) storage tank Download PDFInfo
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- CN105485513A CN105485513A CN201511013567.3A CN201511013567A CN105485513A CN 105485513 A CN105485513 A CN 105485513A CN 201511013567 A CN201511013567 A CN 201511013567A CN 105485513 A CN105485513 A CN 105485513A
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- pump
- lng
- pump sump
- storage tank
- sump
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a built-in pump LNG (liquefied natural gas) storage tank, belongs to the field of LNG storage devices, and discloses the built-in pump LNG storage tank. The built-in pump LNG storage tank comprises an LNG storage tank body and a pump well, wherein the pump well is connected on the LNG storage tank body, and stretches into the LNG storage tank body; an LNG immersed pump is arranged in the pump well; one end of a liquid outlet hose is connected on the LNG immersed pump, and the other end of the liquid outlet hose is communicated to the outer part of the pump well; a hoisting mechanism used for hoisting and lifting the LNG immersed pump and a pump well blind flange used for sealing the pump well are arranged at the opening part of the pump well; a pump well bottom valve is arranged at the bottom of the pump well; the pump well bottom valve comprises a valve seat, a valve core and a spring seat; the spring seat is fixedly connected with the valve seat through a valve core guide pillar; the valve core is arranged on the valve core guide pillar in a sleeving manner, and is propped against the spring seat through a spring; the valve seat and the valve core are sealed through a valve seat sealing element; and the valve core of the pump well bottom valve is pushed open under the gravity action of the LNG immersed pump, or is closed under the elastic action of the spring.
Description
Technical field
The present invention relates to a kind of LNG storage tank of internal pump, belong to LNG storage facilities field.
Background technique
LNG(LiquefiedNaturalGas), i.e. the english abbreviation of LNG Liquefied natural gas.Rock gas is the inflammable gas that natural opening extraction comes in gas field, and main component is made up of methane.LNG is cooled to-162 DEG C by the rock gas of gaseous state at ambient pressure, makes it to condense into liquid.Can greatly save storage and transportation space and cost after natural gas liquefaction, and have that calorific value is large, performance high.LNG is a kind of clean, efficient energy.Realize energy supply diversification because imported L NG contributes to energy-consuming state, ensure energy security, and export LNG contribute to natural gas producing nation effective exploitation natural gas resource, increase foreign exchange earnings, promote national economic development, thus LNG trade is just becoming the new focus of global energy markets.Rock gas is more and more favored as clean energy resource, and LNG is all classified as preferred fuels by a lot of country, and the ratio of rock gas in energy supply increases sharply.LNG Liquefied natural gas just with annual about 12% rapid growth, become the whole world and increase one of the swiftest and the most violent energy industry.The production and trade of global LNG is increasingly active in recent years, and LNG has become rare clean resource, is becoming the focus that world's oil and gas industry is new.For ensureing energy supply diversification and improving energy consumption structure, some energy-consuming big countries more and more pay attention to the introduction of LNG, and LNG receiving station is all built extensive in Japan, Korea S, the U.S., Europe.International major oil companies are also numerous and confused turns to LNG business by its new profit growth point, and LNG is by the popular energy commodity of next whole world contention after becoming oil.Natural Gas In China utilizes very uneven, and the proportion of rock gas in energy source in China is very little.From the natural gas development situation of China, natural gas resource is limited, and gas production is far smaller than demand, and insufficiency of supply-demand is increasing.While China's economic sustained and rapid development, for ensureing that economic energy source and power is but extremely in short supply.The energy resource structure of China is based on coal, and oil, rock gas only account for very little ratio, well below world average level.Along with country is to the continuous growth of energy demand, introduces LNG by the energy resource structure optimizing China, effectively solve the two fold problem of the energy safety of supply, ecological environmental protection, realize sustainable development that is economic and society and play a significant role.The related specifications that domestic current nothing instructs LNG storage tank to design, LNG in insulated storage tank, has special physical property as a kind of boiling liquid mass storage, therefore storage tank operation and manage have some special place.These physical propertys comprise evaporation and the rolling of LNG.
In existing industry, built-in pump type LNG storage tank is that LNG immersed pump is directly placed in tank inside, needs tank inside mediator depletion and purge totally can to keep in repair or change during examine and replace, waste ample resources and repair time; LNG storage tank shaft bottom valve with shaft bottom valve is not removable, cannot change spool and valve base seal.
Summary of the invention
The object of the invention is to: for above-mentioned Problems existing, provide a kind of LNG storage tank of internal pump, LNG immersed pump is installed on LNG storage tank inside, LNG immersed pump can independent maintenance, and maintenance, need not the mediator depletion in storage tank.Pump sump is built in LNG storage tank body interior, LNG immersed pump is installed in pump sump, carry pump hoist cable and can be hung out maintenance, pump sump bottom pump down-hole volution is equipped with pump sump bottom valve, after LNG immersed pump is lifted a segment distance, pump sump bottom valve can cut out automatically, prevents the medium in LNG storage tank from revealing along pump sump.This apparatus structure is simply easy to use, effectively can realize quick assembling and the use of LNG immersed pump, the safety in utilization of effective guarantee immersed pump, effectively can improve the dismounting efficiency of immersed pump, reduces LNG storage tank maintenance in use and the cost of maintenance; The hoisting mechanism at pump sump top, can be elevated this LNG immersed pump to a certain extent, thus the pump sump bottom valve opening and closing that control is located at bottom pump sump, realize the isolation of pump sump and LNG storage tank body under sealed conditions.
The technical solution used in the present invention is as follows:
The invention discloses a kind of LNG storage tank of internal pump, comprise LNG storage tank body and pump sump, pump sump to be connected on LNG storage tank body and to stretch in LNG storage tank body, LNG immersed pump is provided with in pump sump, LNG immersed pump connects one end of fluid flexible pipe, the other end of fluid flexible pipe this be communicated to pump sump outside; Be provided with for lifting and being elevated the hoisting mechanism of LNG immersed pump and the pump sump blind flange for sealing pump sump at the oral area of pump sump; The bottom of pump sump is provided with pump sump bottom valve, pump sump bottom valve comprises valve seat, spool and spring seat, spring seat is fixedly connected with valve seat by spool guide pillar, valve core housing to be located on spool guide pillar and to be butted on spring seat by spring, sealed by valve base seal at valve seat and spool, the spool of pump sump bottom valve promotes to open or close under spring force effect under LNG immersed pump Action of Gravity Field.
Due to said structure, its built-in pump type LNG storage tank is that LNG immersed pump is directly placed in tank inside, without the need to by tank inside mediator depletion during examine and replace, reduces maintenance cost and time; And pump sump bottom valve is dismantled and assembled, because LNG immersed pump overhauls once, pump sump bottom valve opens and closes once, and therefore the working life of pump sump bottom valve is very long, improves utilization efficiency and the life-span of LNG storage tank.The hoisting mechanism at pump sump top, this LNG immersed pump can be elevated to a certain extent, thus the pump sump bottom valve opening and closing that control is located at bottom pump sump, realize the isolation of pump sump and LNG storage tank body under sealed conditions, the normal use of effective assurance device, ensure that this device can realize the sealing bottom pump sump, the usability of lifting device and the convenience of maintenance, effectively guarantee the maintenance of quick implement device and the maintain and replace of LNG immersed pump, LNG immersed pump is installed on LNG storage tank inside, LNG immersed pump can independent maintenance, maintenance, need not the mediator depletion in storage tank.Be embodied in: pump sump is built in LNG storage tank inside, LNG immersed pump is installed in pump sump, carry pump hoist cable and can be hung out maintenance, pump sump bottom pump down-hole volution is equipped with pump sump bottom valve, after LNG immersed pump is lifted a segment distance, pump sump bottom valve can cut out automatically, prevents the medium in LNG storage tank from revealing along pump sump.
Further, described hoisting mechanism comprises pump sump upper cap nut, operation screw rod, and this operation screw rod passes pump sump blind flange and is threaded with pump sump upper cap nut, is connected with and carries pump hoist cable, carry pump hoist cable lower end and connect LNG immersed pump in operation screw rod end.This hoisting structure realizes the lifting of LNG immersed pump by worm structure, effectively can guarantee the sealing of pump sump, more can realize the lifting of LNG immersed pump in labour-saving simultaneously, ensures that the safety of this device is normal and uses.
Further, operate screw rod and the joint carrying pump hoist cable is provided with rotating hoisting ring.This rotation adjusts suspension ring can realize 360 degree of rotations, reduces operation screw rod and carries pump hoist cable torsion, ensures the fatigue strength effectively reducing this joint, improves the working life of this hoisting mechanism.
Further, the top of pump sump is provided with the scavenging conduit be communicated in pump sump, scavenging conduit is connected with purging stop valve.It purges stop valve and scavenging conduit can be coordinated to clear up in pump sump, prevents pump sump to be mixed into impurity, affects the Security of LNG storage tank.
Further, volution under the bottom of pump sump is provided with pump sump, pump sump bottom valve is tightly connected by volution under pump sump and pump sump.Under its pump sump, volution can strengthen the sealing effect of pump sump bottom, can the sealing of effective pump sump, and its leakage efficiency and working life improve more than 20%.
Further, be connected with muffler in the bottom of pump sump, muffler be provided with return-air stop valve, one end of this muffler is communicated in pump sump, the other end is communicated in LNG storage tank body.Due to its muffler of said structure and return-air stop valve, can effectively avoid the gas of pump sump too much and then affect the extraction of LNG immersed pump, effective regulate in pump sump with the difference of liquid level in LNG liquid container body.
Further, be connected with drain pipe at pump sump, drain pipe be provided with fluid stop valve, at one end of drain pipe and fluid soft pipe connection, drain pipe has inverted U-shaped curved part.Its U-shaped curved part can effectively prevent ducted liquid from flowing backwards, the utilization efficiency of effective raising equipment and using effect.
Further, the method for dismounting of its LNG immersed pump:
Step 1: rotation process screw rod makes LNG immersed pump rise, until the spool of pump sump bottom valve under the effect of spring force with valve seat gluing, sealing, then detect LNG storage tank body outlet pressure to confirm that pump sump bottom valve cuts out;
Step 2: pass into nitrogen or inert gas to get rid of the LNG liquid in pump sump in pump sump;
Step 3: close the valve be everywhere connected with LNG storage tank body, take pump sump blind flange apart, to sling LNG immersed pump along pump sump, then changes or dismantle the LNG immersed pump that this is sling.
Due to said method, can guarantee LNG immersed pump can quick-detachment so that change and maintenance, can save a large amount of maintenances is the time, ensure the normal use of LNG storage tank, the maintenance of design to LNG immersed pump of this mode improves more than 50%, in pump sump, pass into nitrogen or inert gas cleans, effectively can prevent leaking of inflammable gas, strengthen the Security of equipment use.Guarantee is personal safety.
Further, the assembly method of its LNG immersed pump:
Step 1: check that the valve be everywhere connected with LNG storage tank body is indeed closed, is placed on pump sump by the sealing of pump sump blind flange, passes into nitrogen or inert gas to clean pump sump in pump sump, then discharge nitrogen or inert gas;
Step 2: open pump sump blind flange, lifts in pump sump by LNG immersed pump, then again covers pump sump blind flange and confirms that pump sump seals;
Step 3: rotation process screw rod makes LNG immersed pump decline, LNG immersed pump promotes spool under gravity makes pump sump bottom valve open, open the valve be everywhere connected with LNG storage tank body, detect LNG storage tank body outlet pressure and confirm that pump sump bottom valve is indeed opened.
Due to said method, this device can realize the quick assembling of LNG immersed pump, can the quick assembling of effective implement device, the normal use of equipment can be ensured, the method makes LNG immersed pump safer in equipment process, can effectively prevent immersed pump in assembly process, be mixed into the Security of impurity effect equipment.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, this apparatus structure is simply easy to use, effectively can realize quick assembling and the use of LNG immersed pump, the safety in utilization of effective guarantee immersed pump, effectively can improve the dismounting efficiency of immersed pump, reduces LNG storage tank maintenance in use and the cost of maintenance;
2, the hoisting mechanism at pump sump top, can be elevated this LNG immersed pump to a certain extent, thus the pump sump bottom valve opening and closing that control is located at bottom pump sump, realize the isolation of pump sump and LNG storage tank body under sealed conditions;
3, its built-in pump type LNG storage tank is that LNG immersed pump is directly placed in tank inside, without the need to by tank inside mediator depletion during examine and replace, reduces maintenance cost and time; And pump sump bottom valve is dismantled and assembled, because LNG immersed pump overhauls once, pump sump bottom valve opens and closes once, and therefore the working life of pump sump bottom valve is very long, improves utilization efficiency and the life-span of LNG storage tank.
Accompanying drawing explanation
Fig. 1 is the LNG storage tank phantom of internal pump in the present invention;
Fig. 2 is pump sump chart at the bottom of in the present invention;
Fig. 3 is pump sump top junction composition in the present invention;
Mark in figure: 1-LNG storage tank body, 2-pump sump, 3-fluid flexible pipe, 4-muffler, 5-LNG immersed pump, 6-pump sump bottom valve, 7-carries pump hoist cable, 8-return-air stop valve, 9-fluid stop valve, 10-scavenging conduit, 11-valve seat, 12-spool, 13-valve base seal, 14-spring, 15-spring seat, 16-spool guide pillar, 17-valve seat stopper ring, volution under 18-pump sump, 19-pump sump blind flange, 20-operates screw rod, the upper cap nut of 21-pump sump, 22-rotating hoisting ring.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Specific embodiment:
As Figure 1-3, the LNG storage tank of internal pump of the present invention, comprise LNG storage tank body 1 and pump sump 2, pump sump 2 to be connected on LNG storage tank body 1 and to stretch in LNG storage tank body 1, LNG immersed pump 5 is provided with in pump sump 2, LNG immersed pump 5 connects one end of fluid flexible pipe 3, the other end of fluid flexible pipe 3 this to be communicated to pump sump 2 outside; Be provided with for lifting and being elevated the hoisting mechanism of LNG immersed pump 5 and the pump sump blind flange 19 for sealing pump sump 2 at the oral area of pump sump 2; The bottom of pump sump 2 is provided with pump sump bottom valve 6, pump sump bottom valve 6 comprises valve seat 11, spool 12 and spring seat 15, spring seat 15 is fixedly connected with valve seat 11 by spool guide pillar 16, spool 12 to be set on spool guide pillar 16 and to be butted on spring seat 15 by spring 14, sealed by valve base seal 13 at valve seat 11 and spool 12, valve base seal 13 adopts rubber seal, and the spool 12 of pump sump bottom valve 6 promotes to open or close under the effect of spring 14 elastic force under LNG immersed pump 5 Action of Gravity Field.
Its built-in pump type LNG storage tank is that LNG immersed pump 5 is directly placed in tank inside, without the need to by tank inside mediator depletion during examine and replace, reduces maintenance cost and time; And pump sump bottom valve 6 is dismantled and assembled, because LNG immersed pump 5 overhauls once, pump sump bottom valve 6 opens and closes once, and therefore the working life of pump sump bottom valve 6 is very long, improves utilization efficiency and the life-span of LNG storage tank.The hoisting mechanism at pump sump 2 top, this LNG immersed pump 5 can be elevated to a certain extent, thus pump sump bottom valve 6 opening and closing that control is located at bottom pump sump 2, realize the isolation of pump sump 2 and LNG storage tank body 1 under sealed conditions, the normal use of effective assurance device, ensure that this device can realize the sealing bottom pump sump 2, the usability of lifting device and the convenience of maintenance, effectively guarantee the maintenance of quick implement device and the maintain and replace of LNG immersed pump 5, LNG immersed pump 5 is installed on LNG storage tank inside, LNG immersed pump 5 can independent maintenance, maintenance, need not the mediator depletion in storage tank.Be embodied in: pump sump 2 is built in LNG storage tank inside, LNG immersed pump 5 is installed in pump sump 2, carry pump hoist cable 7 and can be hung out maintenance, pump sump 2 bottom pump down-hole volution 18 ring is equipped with pump sump bottom valve 6, after LNG immersed pump 5 is lifted a segment distance, pump sump bottom valve 6 can cut out automatically, prevents the medium in LNG storage tank from revealing along pump sump 2.
Hoisting mechanism comprises pump sump upper cap nut 21, operation screw rod 20, and this operation screw rod 20 passes pump sump blind flange 19 and is threaded with pump sump upper cap nut 21, is connected with and carries pump hoist cable 7, carry pump hoist cable 7 lower end and connect LNG immersed pump 5 in operation screw rod 20 end.This hoisting structure realizes the lifting of LNG immersed pump 5 by worm structure, effectively can guarantee the sealing of pump sump 2, more can realize the lifting of LNG immersed pump 5 in labour-saving simultaneously, ensures that the safety of this device is normal and uses.
Operation screw rod 20 is provided with rotating hoisting ring 22 with the joint carrying pump hoist cable 7.This rotation adjusts suspension ring can realize 360 degree of rotations, reduces operation screw rod 20 and carries pump hoist cable 7 torsion, ensures the fatigue strength effectively reducing this joint, improves the working life of this hoisting mechanism.
Be provided with the scavenging conduit 10 be communicated in pump sump 2 at the top of pump sump 2, scavenging conduit 10 be connected with purging stop valve.Its purging stop valve can coordinate in scavenging conduit 10 pairs of pump sumps 2 to be cleared up, and prevents pump sump 2 to be mixed into impurity, affects the Security of LNG storage tank.
Volution 18 under the bottom of pump sump 2 is provided with pump sump, pump sump bottom valve 6 is tightly connected by volution under pump sump 18 and pump sump 2.Under its pump sump, volution 18 can strengthen the sealing effect of pump sump 2 bottom, can the sealing of effective pump sump 2, and its leakage efficiency and working life improve more than 20%.
Be connected with muffler 4 in the bottom of pump sump 2, muffler 4 be provided with return-air stop valve 8, one end of this muffler 4 is communicated in pump sump 2, the other end is communicated in LNG storage tank body 1.Due to its muffler 4 of said structure and return-air stop valve 8, can effectively avoid the gas of pump sump 2 too much and then affect the extraction of LNG immersed pump 5, effective regulate in pump sump 2 with the difference of liquid level in LNG liquid container body.
Be connected with drain pipe at pump sump 2, drain pipe be provided with fluid stop valve, be communicated with in one end of drain pipe with fluid flexible pipe 3, drain pipe has inverted U-shaped curved part.Its U-shaped curved part can effectively prevent ducted liquid from flowing backwards, the utilization efficiency of effective raising equipment and using effect.
This device in use, it is inner that pump sump 2 is built in LNG storage tank body 1, LNG immersed pump 5 is lifted in pump sump 2, screw rod is installed in pump sump upper cap nut 21, screw rod by rotating hoisting ring 22 with carry pump hoist cable 7 upper end and be connected, carry pump hoist cable 7 lower end to be connected with LNG immersed pump 5, LNG immersed pump 5 can be mentioned by operation screw rod 20, pump sump bottom valve 6 installed by pump sump 2 bottom pump down-hole volution 18, when needs maintenance or when changing LNG immersed pump 5, close pump sump 2 return-air stop valve 8 and pump sump 2 fluid stop valve 9, then screw screw rod to carry pump hoist cable 7 LNG immersed pump 5 is promoted, make LNG immersed pump 5 act on spool 12 gravity to be eliminated, under action from the spring 14, spool 12 moves up along spool guide pillar 16, valve base seal 13 is had between spool 12 and valve seat 11, after spool 12 and valve seat 11 are fitted, shaft bottom valve cuts out, at this moment LNG storage tank and pump sump 2 completely cut off, now open purging stop valve and pump sump 2 is purged and replace inertia safe gas nitrogen, then open pump sump 2 to cover, removal pumps liquid flexible pipe 3, it is made to be separated with pump sump 2, pump hoist cable 7 will be carried finally by crane gear to hang out in the lump with pump sump 2, can carry out like this keeping in repair and changing parts.
Pump sump bottom valve 6 is installed bottom pump sump 2, its pump sump bottom valve 6 replaceable parts spool 12 and valve base seal 13, this work changing pump sump bottom valve 6 is carried out after LNG immersed pump 5 hangs out pump sump 2, concrete methods of realizing is: with the inner inflammable gas of safe inert gas replacement LNG storage tank, after valve seat stopper ring 11 being taken out along pump sump 2 inwall with lengthening tool, with lengthening hexagon wrench, shaft bottom valve is unscrewed completely again, volution 18 under departing from pump sump to it, and then with lengthening tool, shaft bottom valve is hung out, such repair and replacement.Pump sump 2 is built in LNG storage tank inside, in pump sump 2, LNG immersed pump 5 is installed, carry pump hoist cable 7 and can be hung out maintenance, pump sump 2 bottom pump down-hole volution 18 ring is equipped with pump sump bottom valve 6, after LNG immersed pump 5 is lifted a segment distance, pump sump bottom valve 6 can cut out automatically, prevents the medium in LNG storage tank from revealing along pump sump 2.LNG immersed pump 5 can be mentioned by operation screw rod 20, make LNG immersed pump 5 act on spool 12 gravity and be eliminated, under action from the spring 14, spool 12 moves up along spool guide pillar 16, and after spool 12 and valve seat 11 are fitted, shaft bottom valve cuts out.
Specific embodiment 2:
The LNG storage tank of the internal pump according to embodiment 1, the method for dismounting of its LNG immersed pump 5:
Step 1: rotation process screw rod 20 makes LNG immersed pump 5 rise, until the spool 12 of pump sump bottom valve 6 under the effect of spring 14 elastic force with valve seat 11 gluing, sealing, then detect LNG storage tank body 1 outlet pressure to confirm that pump sump bottom valve 6 cuts out;
Step 2: pass into nitrogen or inert gas to get rid of the LNG liquid in pump sump 2 in pump sump 2;
Step 3: close the valve be everywhere connected with LNG storage tank body 1, take pump sump blind flange 19 apart, to sling LNG immersed pump 5 along pump sump 2, then changes or dismantle the LNG immersed pump 5 that this is sling.
Due to said method, can guarantee LNG immersed pump 5 can quick-detachment so that change and maintenance, can save a large amount of maintenances is the time, ensure the normal use of LNG storage tank, the maintenance of design to LNG immersed pump 5 of this mode improves more than 50%, in pump sump 2, pass into nitrogen or inert gas cleans, effectively can prevent leaking of inflammable gas, strengthen the Security of equipment use.Guarantee is personal safety.
Specific embodiment 3:
The LNG storage tank of the internal pump according to embodiment 1, the assembly method of its LNG immersed pump 5:
Step 1: check that the valve be everywhere connected with LNG storage tank body 1 is indeed closed, is placed on pump sump 2 by pump sump blind flange 19 sealing, passes into nitrogen or inert gas to clean pump sump 2 in pump sump 2, then discharge nitrogen or inert gas;
Step 2: open pump sump blind flange 19, lifts LNG immersed pump 5 in pump sump 2, then again covers pump sump blind flange 19 and confirms that pump sump 2 seals;
Step 3: rotation process screw rod 20 makes LNG immersed pump 5 decline, LNG immersed pump 5 promotes spool 12 under gravity makes pump sump bottom valve 6 open, open the valve be everywhere connected with LNG storage tank body 1, detect LNG storage tank body 1 outlet pressure and confirm that pump sump bottom valve 6 is indeed opened.
Due to said method, this device can realize the quick assembling of LNG immersed pump 5, can the quick assembling of effective implement device, the normal use of equipment can be ensured, the method makes LNG immersed pump 5 safer in equipment process, can effectively prevent immersed pump in assembly process, be mixed into the Security of impurity effect equipment.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the LNG storage tank of an internal pump, it is characterized in that, comprise LNG storage tank body (1) and pump sump (2), pump sump (2) is connected to LNG storage tank body (1) and goes up and stretch in LNG storage tank body (1), LNG immersed pump (5) is provided with in pump sump (2), the upper one end connecting fluid flexible pipe (3) of LNG immersed pump (5), the other end of fluid flexible pipe (3) this to be communicated to pump sump (2) outside, be provided with for lifting and being elevated the hoisting mechanism of LNG immersed pump (5) and the pump sump blind flange (19) for sealing pump sump (2) at the oral area of pump sump (2), the bottom of pump sump (2) is provided with pump sump bottom valve (6), pump sump bottom valve (6) comprises valve seat (11), spool (12), and spring seat (15), spring seat (15) is fixedly connected with valve seat (11) by spool guide pillar (16), spool (12) is set in spool guide pillar (16) and goes up and pass through spring (14) and be butted on spring seat (15), sealed by valve base seal (13) at valve seat (11) and spool (12), the spool (12) of pump sump bottom valve (6) promotes to open or close under spring (14) elastic force effect under LNG immersed pump (5) Action of Gravity Field.
2. the LNG storage tank of internal pump according to claim 1, it is characterized in that, described hoisting mechanism comprises pump sump upper cap nut (21), operation screw rod (20), this operation screw rod (20) is through pump sump blind flange (19) and be threaded with pump sump upper cap nut (21), be connected with in operation screw rod (20) end and carry pump hoist cable (7), carry pump hoist cable (7) lower end and connect LNG immersed pump (5).
3. the LNG storage tank of internal pump according to claim 2, is characterized in that, operation screw rod (20) is provided with rotating hoisting ring (22) with the joint carrying pump hoist cable (7).
4. the LNG storage tank of internal pump according to claim 1, is characterized in that, the top of pump sump (2) is provided with the scavenging conduit be communicated in pump sump (2), scavenging conduit is connected with purging stop valve.
5. the LNG storage tank of internal pump according to claim 4, is characterized in that, volution (18) under the bottom of pump sump (2) is provided with pump sump, and pump sump bottom valve (6) is tightly connected by volution under pump sump (18) and pump sump (2).
6. the LNG storage tank of the internal pump according to any one of claim 1-5, it is characterized in that, muffler (4) is connected with in the bottom of pump sump (2), (4) are provided with return-air stop valve to muffler, and one end of this muffler (4) is communicated in pump sump (2), the other end is communicated in LNG storage tank body (1).
7. the LNG storage tank of internal pump according to claim 1, is characterized in that, is connected with drain pipe, drain pipe is provided with fluid stop valve at pump sump (2), is communicated with fluid flexible pipe (3) in one end of drain pipe, and drain pipe has inverted U-shaped curved part.
8. the LNG storage tank of the internal pump according to any one of claim 6, is characterized in that, the method for dismounting of its LNG immersed pump (5):
Step 1: rotation process screw rod (20) makes LNG immersed pump (5) rise, until the spool (12) of pump sump bottom valve (6) under the effect of spring (14) elastic force with valve seat (11) gluing, sealing, then detect LNG storage tank body (1) outlet pressure to confirm that pump sump bottom valve (6) cuts out;
Step 2: pass into nitrogen or inert gas to get rid of the LNG liquid in pump sump (2) in pump sump (2);
Step 3: close the valve everywhere that is connected with LNG storage tank body (1), take pump sump blind flange (19) apart, to sling LNG immersed pump (5) along pump sump (2), then changes or dismantle the LNG immersed pump (5) that this is sling.
9. the LNG storage tank of the internal pump according to any one of claim 6, is characterized in that, the assembly method of its LNG immersed pump (5):
Step 1: check that the valve be everywhere connected with LNG storage tank body (1) is indeed closed, pump sump blind flange (19) sealing is placed on pump sump (2), in pump sump (2), pass into nitrogen or inert gas to purge pump sump (2), then discharge nitrogen or inert gas;
Step 2: open pump sump blind flange (19), lifts LNG immersed pump (5) in pump sump (2), then again covers pump sump blind flange (19) and confirms that pump sump (2) seals;
Step 3: rotation process screw rod (20) makes LNG immersed pump (5) decline, LNG immersed pump (5) promotes spool (12) under gravity makes pump sump bottom valve (6) open, open the valve be everywhere connected with LNG storage tank body (1), detect LNG storage tank body (1) outlet pressure and confirm that pump sump bottom valve (6) is indeed opened.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679439A (en) * | 2018-05-29 | 2018-10-19 | 田红梅 | A kind of buried LNG storage tank and stocking system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5839716A (en) * | 1996-03-15 | 1998-11-24 | Vrm France | Device for transferring liquid under simple or accelerated gravity by means of a valve |
| CN2441788Y (en) * | 2000-09-22 | 2001-08-08 | 桑有富 | Hoisting device |
| CN102213361A (en) * | 2011-05-30 | 2011-10-12 | 中国寰球工程公司 | Liquid ethylene storage tank, liquid ethylene storage and gasification system and liquid ethylene gasification method |
| CN202118312U (en) * | 2011-06-22 | 2012-01-18 | 永城煤电控股集团有限公司 | Liquid return shutoff valve |
| CN203641573U (en) * | 2013-12-04 | 2014-06-11 | 大连深蓝泵业有限公司 | Plane sealing suction bottom valve matched with low temperature immersed pump |
| CN104235594A (en) * | 2013-06-13 | 2014-12-24 | 张家港中集圣达因低温装备有限公司 | Horizontal double-layer buried storage tank |
| CN104747908A (en) * | 2015-04-14 | 2015-07-01 | 陕西瑞科特种设备技术有限公司 | Online drawable immersed pump system for deep-cooling storage tank |
| CN205278757U (en) * | 2015-12-31 | 2016-06-01 | 成都华气厚普机电设备股份有限公司 | Built -in pump LNG storage tank |
-
2015
- 2015-12-31 CN CN201511013567.3A patent/CN105485513A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5839716A (en) * | 1996-03-15 | 1998-11-24 | Vrm France | Device for transferring liquid under simple or accelerated gravity by means of a valve |
| CN2441788Y (en) * | 2000-09-22 | 2001-08-08 | 桑有富 | Hoisting device |
| CN102213361A (en) * | 2011-05-30 | 2011-10-12 | 中国寰球工程公司 | Liquid ethylene storage tank, liquid ethylene storage and gasification system and liquid ethylene gasification method |
| CN202118312U (en) * | 2011-06-22 | 2012-01-18 | 永城煤电控股集团有限公司 | Liquid return shutoff valve |
| CN104235594A (en) * | 2013-06-13 | 2014-12-24 | 张家港中集圣达因低温装备有限公司 | Horizontal double-layer buried storage tank |
| CN203641573U (en) * | 2013-12-04 | 2014-06-11 | 大连深蓝泵业有限公司 | Plane sealing suction bottom valve matched with low temperature immersed pump |
| CN104747908A (en) * | 2015-04-14 | 2015-07-01 | 陕西瑞科特种设备技术有限公司 | Online drawable immersed pump system for deep-cooling storage tank |
| CN205278757U (en) * | 2015-12-31 | 2016-06-01 | 成都华气厚普机电设备股份有限公司 | Built -in pump LNG storage tank |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679439A (en) * | 2018-05-29 | 2018-10-19 | 田红梅 | A kind of buried LNG storage tank and stocking system |
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