WO2016152653A1 - 作業用鞘管、及び、ポンプ吐出配管の改修作業をするための環境整備方法 - Google Patents
作業用鞘管、及び、ポンプ吐出配管の改修作業をするための環境整備方法 Download PDFInfo
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- WO2016152653A1 WO2016152653A1 PCT/JP2016/058146 JP2016058146W WO2016152653A1 WO 2016152653 A1 WO2016152653 A1 WO 2016152653A1 JP 2016058146 W JP2016058146 W JP 2016058146W WO 2016152653 A1 WO2016152653 A1 WO 2016152653A1
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- WIPO (PCT)
- Prior art keywords
- barrel
- pump discharge
- sheath tube
- discharge pipe
- insertion hole
- Prior art date
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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
- F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
-
- 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
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
- F17C13/126—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for large storage containers for liquefied gas
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/141—Arrangements for the insulation of pipes or pipe systems in which the temperature of the medium is below that of the ambient temperature
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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
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
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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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/03—Orientation
- F17C2201/032—Orientation with substantially vertical main axis
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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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
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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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0352—Pipes
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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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0388—Arrangement of valves, regulators, filters
- F17C2205/0391—Arrangement of valves, regulators, filters inside the pressure vessel
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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
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/221—Welding
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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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
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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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. for liquefied gas
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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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
- F17C2223/042—Localisation of the removal point
- F17C2223/046—Localisation of the removal point in the liquid
- F17C2223/047—Localisation of the removal point in the liquid with a dip tube
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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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/04—Methods for emptying or filling
- F17C2227/044—Methods for emptying or filling by purging
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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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/015—Facilitating maintenance
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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
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0134—Applications for fluid transport or storage placed above the ground
Definitions
- the present invention relates to an environmental maintenance method for repairing work sheath pipes and pump discharge pipes.
- an equipment including a tank for storing a low-temperature liquefied gas and a plurality of pump barrels for discharging the low-temperature liquefied gas stored in the tank.
- This pump barrel is a barrel that hangs down in the tank, a suction pump that is installed inside the barrel and sucks up the stored liquid, and when the suction pump is driven, the sucked-up storage liquid is discharged to the outside. And a pump discharge pipe.
- FIG. 7 is a perspective view showing an example of a conventional pump barrel purge device disclosed in Patent Document 1.
- FIG. 7 is a perspective view showing an example of a conventional pump barrel purge device disclosed in Patent Document 1.
- a conventional purge device 101 for a pump barrel includes a tank 102 storing a low-temperature liquefied gas, that is, a liquefied petroleum gas or a liquefied natural gas, and a cylinder suspended in the tank 102.
- a tank 102 storing a low-temperature liquefied gas, that is, a liquefied petroleum gas or a liquefied natural gas, and a cylinder suspended in the tank 102.
- -Shaped barrel 103 a discharge pump 104 installed inside the barrel 103, a discharge line 105 for discharging the stored liquid by driving the discharge pump 104, and an opening near the upper side of the barrel 103.
- a gas introduction pipe 106 that pressurizes and introduces the same gas as the stored liquid into the barrel 103, and an inert gas introduction pipe 107 that pressurizes and introduces the stored liquid and the inert gas into the barrel 103 from the vicinity of the lower opening of the barrel 103 And is configured.
- the barrel 103 is provided with a foot valve 108 that is released by the weight of the pump 104 when the discharge pump 104 is installed.
- the discharge pump 104 is extracted. Since the inside of the barrel 103 is filled with an inert gas, there is no risk of ignition due to contact with oxygen in the atmosphere, and the discharge pump 104 can be extracted safely.
- the discharge pump 104 as a deteriorated part can be replaced, that is, repaired, while operating the tank 102 without discharging the stored liquid in the tank 102. it can.
- the conventional purge device 101 for the pump barrel is a device for replacing the discharge pump 104, and is not for safely performing the fire work accompanying the repair work of the pump discharge pipe corresponding to the discharge line 105. . That is, when deterioration such as a crack occurs in a part of the payout line 105, this part is repaired by welding. For this reason, in the conventional purge apparatus 101 for a pump barrel, even if the inside of the barrel 103 is filled with an inert gas, the liquid storage (or fuel gas) is slightly leaked from the foot valve 108 into the barrel 103. In some cases, when the welding operation is performed in this state, the leaked liquid storage (or fuel gas) may be ignited. In other words, in the conventional pump barrel purge device 101, the pump discharge piping cannot be repaired safely without removing the contents of the tank 102.
- the present invention has been made in view of the above-described background, and performs a work sheath pipe for improving an environment in which a pump discharge pipe can be repaired safely, and a pump discharge pipe.
- the purpose is to provide an environmental improvement method.
- the present invention according to claim 1 is used when repairing a pump discharge pipe branched from a peripheral surface of a cylindrical barrel inserted into a tank in which fuel is stored, It has a bottomed cylindrical shape that can be inserted into the barrel, and has a working space inside.
- An insertion hole for inserting a closing member for closing the pump discharge pipe is provided through the peripheral wall, In the state inserted in the barrel, it is provided so that the penetration hole may become a position facing the opening of the pump discharge piping.
- the ring in the first aspect of the present invention, in the state of being inserted into the barrel, the ring is provided so as to surround the insertion hole in a gap between the barrel and the peripheral wall.
- a partition member for partitioning the inside and outside of the ring is provided.
- the partition member in the second aspect of the present invention, includes a standing portion that is erected in a cylindrical shape from the periphery of the insertion hole or the vicinity thereof, and an outer portion that is attached to the standing portion. And the packing is fitted into the barrel, and the packing is in close contact with the inner peripheral surface of the barrel.
- the positioning portion that positions the barrel in the radial direction is inserted into the barrel. It is provided at the end of the barrel in the direction of insertion.
- the inclination correction unit that corrects the inclination with respect to the barrel in a state of being inserted into the barrel,
- the peripheral wall is provided at a position facing the insertion hole.
- an oxygen concentration meter for measuring the oxygen concentration in the work space is provided. .
- the gas detector according to any one of the first to sixth aspects, further comprising a gas detector for detecting a flammable gas in the work space. To do.
- the present invention according to claim 8 is an environmental maintenance method for repairing the pump discharge pipe using the working sheath pipe according to any one of claims 1 to 7, A blocking step of blocking the flow path from the tank into the barrel; Inserting the working sheath tube into the barrel and arranging the insertion hole so that the insertion hole faces the opening of the pump discharge pipe; and A purge step of discharging an inert gas toward the barrel from a side away from the barrel of the pump discharge pipe and purging the working space with the inert gas; A pump discharge pipe closing step for closing the pump discharge pipe by inserting the closing member through the insertion hole and inserting it into the pump discharge pipe; It is the environmental maintenance method for carrying out the repair work of the pump discharge pipe characterized by sequentially performing.
- the present invention according to claim 9 is the present invention according to claim 8, wherein the closing member is a hexaplug.
- the insertion hole is disposed opposite to the opening of the pump discharge pipe in a state where the working sheath tube is inserted into the barrel.
- an operator can enter the working space of the working sheath tube and insert the closing member into the opening of the pump discharge pipe from the insertion hole, thereby closing the opening of the pump discharge pipe.
- by purging the inside of the pump discharge pipe with an inert gas it is possible to prepare an environment in which the fire work accompanying the repair work of the pump discharge pipe can be performed safely.
- the working sheath tube is provided in a ring shape so as to surround the insertion hole in the gap between the barrel and the peripheral wall of the working sheath tube in a state of being inserted into the barrel.
- a partition member for partitioning the inside and the outside of the ring is provided.
- the partition member includes a standing portion that is erected in a cylindrical shape from the periphery of the insertion hole or the vicinity thereof, and a packing that is externally fitted to the standing portion, In the state inserted in the barrel, the packing is brought into close contact with the inner peripheral surface of the barrel.
- the inside and outside of the ring can be partitioned, preventing the fuel gas from entering the working space from the insertion hole Can be realized.
- the positioning portion for positioning the barrel in the radial direction in the state of being inserted into the barrel is provided at the end of the working sheath tube on the insertion direction side into the barrel. ing. This eliminates the need to move the working sheath tube wastefully when inserting the working sheath tube into the barrel, and smoothly inserts the working sheath tube against the inner surface of the barrel. be able to.
- amends the inclination with respect to a barrel in the state inserted in the barrel is provided in the position facing the insertion hole in the surrounding wall of a working sheath pipe. Yes.
- the dimension from the barrel to the vicinity of the inclination correction part in the peripheral wall of the working sheath tube is determined, and thereby the gap dimension from the barrel to the peripheral edge of the insertion hole in the peripheral wall is determined. It will be.
- the oxygen concentration in the work space is measured, and the worker can work in a safe environment in the work space.
- gas detection in the work space is performed, and the worker can work in a safer environment in the work space.
- the flow path from the tank to the barrel is blocked in the blocking step, and the working sheath tube is inserted into the barrel in the sheath tube arranging step.
- the inert gas is discharged from the side away from the barrel of the pump discharge pipe toward the barrel, and the work space is purged with the inert gas.
- the pump discharge pipe closing step the pump discharge pipe is closed by inserting the closing member through the insertion hole and inserting the closing member into the pump discharge pipe.
- the opening of the pump discharge pipe can be reliably closed by using the hexaplug as the closing member.
- liquid or gas can be reliably prevented from entering the pump discharge pipe from the opening on the barrel side.
- FIG. 3 is a cross-sectional view showing a state where the working sheath tube shown in FIG. 2 is inserted into a barrel.
- (A) is a figure which shows the cross section orthogonal to the axis
- (B) is a principal part enlarged view of (A).
- (A) is a perspective view which shows the packing which comprises the partition member shown by FIG.
- FIG. 4 is a top view which shows the state which expand
- FIG. 4 is a cross-sectional view subsequent to the operation of FIG. 3, showing a state where an environment for repairing the pump discharge pipe is prepared. It is a perspective view which shows an example of the purge apparatus of the conventional pump barrel disclosed by patent document 1.
- FIGS. 1 to 6 an environment maintenance method for repairing a working sheath tube and a pump discharge pipe according to an embodiment which is an exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 6.
- FIG. 1 is a perspective view showing a tank 2 in which a working sheath tube 1 (shown in FIG. 2) used when renovating a pump discharge pipe 4 is used and a cylindrical barrel 3 inserted into the tank 2. It is.
- the tank 2 has a bottomed cylindrical storage tank 21 (not shown in FIG. 1, shown in FIG. 2) that stores LNG (liquefied natural gas) as a fuel in a liquefied state, and this storage tank A cylindrical outer tub 22 that covers the peripheral surface of the storage tank 21, a dome-shaped roof 23 that covers the upper opening of the storage tank 21, and a support structure (not shown) that supports the storage tank 21 and the outer tank 22. Configured. A cold insulating material (not shown) is filled between the storage tank 21 and the outer tank 22 in order to suppress heat input from the outside. In this tank 2, LNG (liquefied natural gas) is stored in a liquefied state.
- LNG liquefied natural gas
- “LNG” in a liquefied state is used as the fuel stored in the tank 2.
- “LPG (liquefied petroleum gas)” in the liquefied state is used.
- it may be in a liquefied state or in a vaporized state while being stored in the tank 2.
- gasoline high octane gasoline, unleaded gasoline
- biofuel biodiesel, biogas, biomass ethanol
- gaseous fuel liquefied petroleum gas, natural gas, hydrogen
- ethylene Ammonia or the like.
- the tank 2 is provided with a work stage S for an operator to work above the roof 23.
- This work stage S is provided along the periphery of the roof 23 of the tank 2.
- a cylindrical barrel 3 incorporating an in-tank pump 31 is fixed to such a tank 2.
- the barrel 3 has its axis arranged along the vertical direction, and its lower end is provided near the bottom of the tank 2, and its upper end is higher than the work stage S. It protrudes upward and is fixed.
- the barrel 3 is provided with a barrel flange 32 extending in a bowl shape from the peripheral edge constituting the upper opening.
- An in-tank pump 31 installed inside the barrel 3 is carried into and out of the opening on the upper side of the barrel 3, and a head plate (not shown) is detachably attached to the opening during normal times when repair work is not performed. ).
- a foot valve 30 having a backflow prevention structure is attached to a fuel suction port that is an opening on the lower side of the barrel 3.
- the foot valve 30 includes a valve seat (not shown), a valve body (not shown) on which the in-tank pump 31 is seated, and a vertical gap between the valve seat and the valve body (hereinafter referred to as [valve]).
- a coil spring (not shown) that opens and closes.
- the valve body is provided below the valve seat (bottom side of the tank 2).
- the coil spring is arranged so that its axis is along the vertical direction.
- the foot valve 30 is configured such that the valve is closed in a natural state where no force is applied to the coil spring, and the valve is opened in a state where the force is applied to the coil spring and the coil spring is extended.
- the in-tank pump 31 has a pump mechanism that sucks up fuel. By driving the in-tank pump 31, the fuel stored in the tank 2 is pumped up from the fuel suction port of the barrel 3.
- the in-tank pump 31 is suspended and seated on the foot valve 30 of the barrel 3 with a wire (not shown) fixed on the upper surface thereof, the valve is opened, lifted, and the valve is closed. It is taken out from the barrel 3.
- the pump discharge pipe 4 distributes the fuel sucked up by the in-tank pump 31.
- the pump discharge pipe 4 is configured so that the inside thereof communicates with the inside of the barrel 3, and is provided in a cylindrical shape from the barrel peripheral wall 33 of the barrel 3. As shown in FIG. 2, the pump discharge pipe 4 is arranged between the roof 23 of the tank 2 and the work stage S while the axis thereof is along the horizontal direction.
- the working sheath tube 1 is a work for repairing the pump discharge pipe 4 branched from the barrel peripheral wall 33 (the peripheral surface of the barrel 3) of the barrel 3 inserted into the tank 2 in which the fuel is stored. It is used when doing.
- This working sheath pipe 1 is used when the pump discharge pipe 4 or a valve (not shown) attached to the pump discharge pipe 4 is repaired.
- the barrel 3 Has been removed from.
- the working sheath tube 1 includes a sheath tube body 10 inserted into the barrel 3, a positioning portion 11 for positioning the sheath tube body 10 in the radial direction of the barrel 3, and an inclination for correcting the inclination with respect to the barrel 3.
- the correction parts 12 and 13 are provided.
- the sheath tube main body 10 includes a disk-shaped sheath tube bottom wall 14, a sheath tube peripheral wall 15 erected in a cylindrical shape at the periphery of the sheath tube bottom wall 14, and the sheath tube bottom wall 14 of the sheath tube periphery wall 15. And a sheath pipe flange 16 extending in a bowl shape from the peripheral edge of the end portion remote from.
- a working space is provided inside the sheath tube main body 10.
- the sheath tube main body 10 is formed in a cylindrical shape whose outer diameter is slightly smaller than the inner diameter of the barrel 3 so that the outer diameter can be inserted into the barrel 3.
- the sheath pipe peripheral wall 15 is formed with an insertion hole 15 a for inserting a hexaplug 7 (described later) as a closing member for closing the pump discharge pipe 4.
- the insertion hole 15 a is formed so as to be in a position facing the opening in the barrel 3 of the pump discharge pipe 4 in a state where the sheath tube main body 10 is inserted into the barrel 3.
- the insertion hole 15 a is formed such that its diameter dimension is larger than the inner diameter dimension of the pump discharge pipe 4.
- the positioning portion 11 is provided so as to protrude from the end portion on the insertion direction side of the sheath tube body 10 toward the outer side in the radial direction of the sheath tube body 10. Three positioning portions 11 are formed at equal intervals in the circumferential direction of the sheath tube main body 10. The three positioning portions 11 are formed so that their protruding dimensions are substantially equal.
- the three positioning portions 11 are formed as the positioning portions 11 so that the protruding dimensions thereof are substantially equal, but the present invention is not limited to this.
- the number of the positioning portions 11 may be less than 3 or 4 or more, and may be continuously formed over the entire circumference of the sheath tube main body 10.
- the inclination correction parts 12 and 13 are provided at two locations spaced apart in the axial direction of the sheath tube main body 10.
- One of these two inclination correction portions 12 and 13 (hereinafter referred to as the inclination correction portion 12) is provided at a position facing the insertion hole 15a, and the other (hereinafter referred to as the inclination correction portion 13) is provided as one side. It is provided on the upper side (side away from the sheath tube bottom wall 14).
- the bolt B is pushed by a predetermined dimension toward the barrel 3 from the inner peripheral surface side of the sheath pipe main body 10, so that the sheath pipe main body 10 is only a predetermined dimension from the barrel 3.
- the inclination correction unit 12 is provided at two locations that are horizontal to each other, that is, at two locations at the same height apart from the sheath tube bottom wall 14 by a predetermined dimension in relation to the obstacle in the barrel 3. Sometimes.
- the inclination correction unit 12 corresponds to an “inclination correction unit” in the claims.
- the insertion hole 15a and the inclination correction part 12 are provided at the same height position. Then, by correcting the inclination of the sheath tube main body 10 with respect to the barrel 3 by the inclination correction unit 12, the dimension from the barrel 3 to the vicinity of the inclination correction unit 12 in the sheath tube peripheral wall 15 is determined. The gap dimension to the periphery of the insertion hole 15a is determined. Thus, by determining the gap dimension from the barrel 3 to the peripheral edge of the insertion hole 15a in the peripheral wall 15 of the sheath tube, the inside and outside of the ring can be reliably partitioned by the ring-shaped partition member 9 (described later).
- a partition member 9 is provided in the gap between the barrel 3 and the sheath tube body 10 in a state where the sheath tube body 10 is inserted into the barrel 3.
- the partition member 9 includes a metal standing portion 91 erected in a cylindrical shape from the periphery of the insertion hole 15a of the sheath tube peripheral wall 15, and the standing portion. And a packing 92 that is externally fitted to 91.
- the standing portion 91 is integrally fixed to the sheath tube main body 10 using a known joining method such as welding.
- the packing 92 is formed in a ring shape from an elastic material such as various rubbers and elastomers.
- the packing 92 is located closer to the barrel 3 than the standing portion 91 at any position on the entire circumference when the sheath tube body 10 is inserted into the barrel 3 and the packing 92 is compressed by the barrel 3. It is protruding.
- the packing 92 is placed on a horizontal surface, and a peripheral edge on the barrel 3 side has a pair of ridges 93 protruding to the barrel 3 side, and a pair And have a gentle slope 95 connecting the top of the peak 93 and the bottom of the valley 94. Configured.
- the inclined portion 95 is configured to have an inclination that follows the curvature constituting the inner peripheral surface of the barrel 3.
- Such a partition member 9 is assembled by bolting the fixing portion 96 in a state where the packing 92 is externally fitted to the standing portion 91.
- the fixing portion 96 includes a bolt B, a ring-shaped packing retainer 97 fitted on the standing portion 91, and a nut 98 that sandwiches the packing retainer 97 between the packing 92.
- the fixing portions 96 are provided at equal intervals on the outer peripheral surface of the partition member 9. In the present embodiment, the fixing portions 96 are provided at twelve locations at equal intervals on the outer peripheral surface of the partition member 9.
- the partition member 9 is fixed to the outer surface of the sheath tube main body 10 so as to surround the insertion hole 15a. In the state where the working sheath tube 1 is fixed to the barrel 3, the partition member 9 has a packing 92 compressed so as to fill a gap between the barrel 3 and the sheath tube body 10.
- the sheath tube main body 10 is provided with an oxygen concentration meter 5 for measuring the oxygen concentration in the working space on the upper surface of the sheath tube bottom wall 14.
- the gas detector 6 which detects the combustible gas of a working space is installed in the upper surface of the sheath tube bottom wall 14 in the sheath tube main body 10.
- the hexa plug 7 serving as the closing member is provided through the first partition plate 71 and the first partition plate 71 and the second partition plate 72 that are arranged at intervals in the axial direction of the pump discharge pipe 4.
- the second purge nozzles 73 and 74 and a hexaplug fixing nut 75 for fixing the hexaplug 7 to the pump discharge pipe 4 are configured.
- the first partition plate 71 and the second partition plate 72 are each formed in a disk shape, and are formed so that the outer diameter dimension thereof is slightly larger than the inner diameter dimension of the pump discharge pipe 4.
- the first purge nozzle 73 supplies nitrogen gas (inert gas) into the partition space
- the second purge nozzle 74 discharges nitrogen gas in the partition space to the outside. It is also confirmed that nitrogen gas is reliably supplied into the partition space by the first purge nozzle 73 from the atmosphere in the partition space released by the second purge nozzle 74.
- Such a hexaplug 7 is inserted through the insertion hole 15 a, the first partition plate 71 is located near the barrel 3 in the pump discharge pipe 4, and the second partition plate 72 is disposed from the barrel 3 across the first partition plate 71. It is inserted into the opening of the pump discharge pipe 4 so as to be located on the far side, and in this state, it is fixed to the pump discharge pipe 4 using a hexaplug fixing nut 75. In this state, nitrogen gas is supplied from the first purge nozzle 73 into the partition space, and nitrogen gas in the partition space is released from the second purge nozzle 74 to the outside.
- the hexaplug 7 can completely shut off the pump discharge pipe 4 and the barrel 3.
- the hexa plug 7 is used as the closing member, but the present invention is not limited to this.
- a sealing material such as a rubber plug or packing may be used.
- the in-tank pump 31 installed in the barrel 3 is lifted and slightly raised. Then, the valve body is raised by the restoring force of the coil spring in the foot valve 30, and the valve is closed (blocking step). Thereafter, the liquid stored in the barrel 3 is pushed into the tank 2 by supplying nitrogen gas through an inert gas introduction pipe (not shown) connected to the pump discharge pipe 4. The in-tank pump 31 is further raised, the head plate (not shown) of the barrel 3 is removed and removed from the barrel 3.
- the working sheath tube 1 lifted by the air hoist J (shown in FIG. 2) is placed on the barrel 3 so that the radial direction thereof is the direction in which the insertion hole 15a and the pump discharge pipe 4 face each other. In an inclined state, it approaches the upper opening of the barrel 3.
- the positioning portion 11 of the working sheath tube 1 is brought into contact with the inner surface of the barrel 3. While positioning the working sheath tube 1 so that the axis of the working sheath tube 1 is along the axis of the barrel 3, the positioning portion 11 positions the sheath tube body 10 at the central portion in the radial direction of the barrel 3. Is inserted into the barrel 3.
- the entirety of the sheath tube main body 10 is inserted into the barrel 3, the barrel flange 32 and the sheath tube flange 16 are vertically stacked, and the insertion hole 15a of the sheath tube body 10 and the pump discharge pipe 4 are arranged to face each other. Thereafter, the bolt B is pushed into the inclination correction unit 13 to correct the inclination of the sheath tube body 10 with respect to the barrel 3. Peripheries of respective bolt holes (not shown) of the barrel flange 32 and the sheath tube flange 16 are overlapped. Thus, the axis of the barrel 3 and the axis of the sheath tube main body 10 are arranged along the vertical direction (vertical direction) (sheath tube placement step).
- annular gasket G1 is sandwiched between the barrel flange 32 and the sheath tube flange 16 to close the gap.
- the barrel flange 32, the annular gasket G1, and the sheath tube flange 16 that are stacked one above the other are bolted.
- the same number of bolt holes are formed in each of the barrel flange 32, the sheath tube flange 16 and the annular gasket G1, but here, the barrel flange 32, the sheath tube flange 16 and the annular gasket G1 are formed. Instead of bolting all the bolt holes that are made, bolt them every other circumferential direction. In this way, the working sheath tube 1 is fixed to the barrel 3.
- the sheath tube body 16 is provided while supplying the nitrogen gas into the barrel 3 through the gap between the sheath tube body 10 and the barrel 3 by passing the nitrogen gas supply nozzle 18 through the sheath tube flange 16 and the annular gasket G1.
- the discharge nozzle 19 is passed through the 10 sheath tube bottom walls 14 to discharge the combustible gas remaining in the barrel 3 to the outside.
- oxygen is supplied into the work space using the air hose 20, and a part of the nitrogen gas and oxygen are replaced (ie, ventilated) in the work space. Thereafter, the oxygen concentration in the working space is measured using the oxygen concentration meter 5 installed in the sheath tube body 10 to confirm that the oxygen concentration in the atmosphere is appropriate.
- the safety of the work space can be visualized by detecting the combustible gas in the work space using the gas detector 6 while measuring the oxygen concentration of the work space using the oxygen concentration meter 5. It becomes.
- a worker human enters the work space.
- a human enters the work space, but the present invention is not limited to this.
- a robot may work as long as it can perform the work described below.
- the worker who has entered the work space first pushes the bolt B into the inclination correction unit 12 provided at a position facing the insertion hole 15a. Then, the gap from the barrel 3 to the peripheral edge of the insertion hole 15 a in the sheath tube peripheral wall 15 is reduced, the packing 92 is compressed between the barrel 3 and the sheath tube body 10, and the packing 92 is in close contact with the inner peripheral surface of the barrel 3. As a result, the inner and outer sides of the ring are partitioned by the partition member 9. At substantially the same time, the inclination of the sheath tube body 10 with respect to the barrel 3 is finely adjusted.
- the hexa plug 7 is inserted into the opening of the pump discharge pipe 4 and fixed inside the pump discharge pipe 4 using a hexa plug fixing nut 75.
- the first and second purge nozzles 74 are attached to the hexa plug 7 in advance, nitrogen gas is injected into the partition space from the first purge nozzle 73, and nitrogen gas in the partition space is included from the second purge nozzle 74. Release the gas to the outside.
- the nitrogen gas is supplied from the first purge nozzle 73, the first and second partition plates 71 and 72 are blocked by the nitrogen gas so as to be separated from each other.
- the discharged gas is measured for the combustible gas concentration using a gas detector, and the leakage state of the combustible gas is confirmed.
- the pump discharge pipe 4 is completely closed (pump discharge pipe closing step).
- the worker leaves the working sheath tube 1 and removes the bolt B of the inclination correction unit 13 as shown in FIG.
- the disc gasket G2 is set on the sheath pipe flange 16, and the hose is switched to the first purge nozzle 73, the second purge nozzle 74, and the discharge nozzle 19 attached to the closing flange 8, and then closed.
- the bolts of the flange 8 are fixed.
- the number of bolt holes formed in the closing flange 8 is the same as the number of bolt holes formed in the barrel flange 32 or the sheath pipe flange 16. Therefore, the bolts of the barrel flange 32, the sheath pipe flange 16 and the disc gasket G2 are bolted by bolting all the bolts of the closing flange 8.
- the first purge nozzle 73, the second purge nozzle 74, the nitrogen gas supply nozzle 18, and the discharge nozzle 19 are provided through the closing flange 8.
- the tip of the second purge nozzle 74 is closed with a cap, and the first purge nozzle 73 is used to supply and pressurize nitrogen gas into the partition space of the hexaplug 7 and use the nitrogen gas supply nozzle 18.
- nitrogen gas is supplied into the barrel 3 from the gap between the sheath main body 10 and the barrel 3, and the atmospheric gas in the barrel 3 is discharged to the outside using the discharge nozzle 19.
- the discharge of the atmospheric gas in the barrel 3 by the discharge nozzle 19 is stopped.
- the nitrogen gas is supplied to the gap between the barrel 3 and the sheath body 10 using the nitrogen gas supply nozzle 18, the inside of the barrel 3 is pressurized. In the state where the internal pressure is equal to 2, the presence or absence of gas leakage from the closing flange 8 is confirmed. If it is confirmed that no leakage has occurred, the supply of nitrogen gas to the barrel 3 by the nitrogen gas supply nozzle 18 is stopped. Thereafter, it is monitored that the pressure in the barrel 3 is constant. In this way, an environment in which the fire work can be performed safely is prepared.
- the nitrogen gas is supplied to the barrel 3 from the gap between the barrel 3 and the sheath tube body 10 using the nitrogen gas supply nozzle 18. Start. In this manner, while releasing the liquid (or fuel gas) from the barrel 3 to the tank 2, the discharge nozzle 19 starts releasing the atmospheric gas in the barrel 3, and the pressure in the barrel 3 is changed to the storage tank 21 of the tank 2. The pressure drops to the same level as the pressure.
- the combustible gas concentration in the atmosphere in the barrel 3 discharged by the discharge nozzle 19 is measured using the gas detector 6.
- the bolt that fixes the closing flange 8 is removed, and the closing flange 8 is removed from the barrel flange 32 and the sheath tube flange 16, and the sheath tube The opening of the main body 10 is exposed. Then, the hoses of the first purge nozzle 73, the second purge nozzle 74, and the discharge nozzle 19 attached to the closing flange 8 are switched, and then the bolt B of the inclination correction unit 13 is attached, and the sheath tube After tightening the bolts that fix the flange 16 and the barrel flange 32, nitrogen gas is supplied from the nitrogen gas supply nozzle 18, and oxygen is supplied into the work space using the air hose 20.
- the oxygen concentration meter 5 is used to measure the oxygen concentration in the work space
- the gas detector 6 is used to detect the flammable gas in the work space. Confirm that the environment does not give
- an operator enters the working space, releases the fixing of the hexaplug fixing nut 75, and connects the hexaplug 7 together with the first purge nozzle 73 and the second purge nozzle 74 to the pump discharge pipe 4. Remove from. And the volt
- the bolt B of the inclination correcting unit 13 is loosened, the bolt that fixes the sheath tube flange 16 and the barrel flange 32 is removed, the fixing of the sheath tube flange 16 and the barrel flange 32 is released, and the nitrogen gas supply nozzle 18 is removed. Then, the discharge nozzle 19 and the air hose 20 are removed, and the working sheath tube 1 is pulled out from the barrel 3. Thus, the working sheath tube 1 is removed from the barrel 3, and a temporary closing plate (not shown) is installed to complete a series of operations.
- the working sheath tube 1 is formed in a bottomed cylindrical shape, it is possible to reliably prevent a tool or the like from falling into the barrel 3 by working in the working space. Therefore, it is possible to provide an environment where the fire work can be safely performed at a low cost and in a short period of time.
- the partition member 9 includes a standing portion 91 that is erected in a cylindrical shape from the peripheral edge of the insertion hole 15 a of the sheath tube peripheral wall 15, and a packing 92 that is externally fitted to the standing portion 91.
- the partition member is configured to include a standing portion that is erected in a cylindrical shape so as to surround the insertion hole 15a from the vicinity of the periphery of the insertion hole 15a, and a packing 92 that is externally fitted to the standing portion. It may be.
- the partition member may be composed of only the packing 92. In that case, the packing 92 may be fixed to the outer peripheral surface of the sheath tube main body 10 so as to surround the insertion hole 15a. Further, when the partition member is composed of only the packing 92, the standing portion 91 may be omitted.
Abstract
Description
即ち、請求項1記載の本発明は、燃料が貯留されたタンク内に挿入された筒状のバレルの周面から分岐されたポンプ吐出配管の改修作業をする際に用いられ、
前記バレル内に挿入可能な有底筒状で、その内部に作業空間を有し、
前記ポンプ吐出配管を閉塞する閉塞部材を挿通させる挿通孔が、その周壁を貫通して設けられ、
前記バレル内に挿入された状態で、前記挿通孔が前記ポンプ吐出配管の開口と対向する位置になるように設けられていることを特徴とする作業用鞘管である。
前記タンクから前記バレル内への流路を遮断する遮断工程と、
前記バレル内に前記作業用鞘管を挿入して、前記挿通孔が前記ポンプ吐出配管の開口と対向するように配置する鞘管配置工程と、
前記ポンプ吐出配管の前記バレルから離れた側から前記バレルに向けて不活性ガスを放出し、前記作業空間内を不活性ガスでパージするパージ工程と、
前記閉塞部材を前記挿通孔から挿通させて、前記ポンプ吐出配管内に挿入することで、前記ポンプ吐出配管を閉塞するポンプ吐出配管閉塞工程と、
を順次行うことを特徴とするポンプ吐出配管の改修作業をするための環境整備方法である。
2 タンク
3 バレル
4 ポンプ吐出配管
7 ヘキサプラグ(閉塞部材)
15 鞘管周壁(周壁)
15a 挿通孔
Claims (9)
- 燃料が貯留されたタンク内に挿入された筒状のバレルの周面から分岐されたポンプ吐出配管の改修作業をする際に用いられ、
前記バレル内に挿入可能な有底筒状で、その内部に作業空間を有し、
前記ポンプ吐出配管を閉塞する閉塞部材を挿通させる挿通孔が、その周壁を貫通して設けられ、
前記バレル内に挿入された状態で、前記挿通孔が前記ポンプ吐出配管の開口と対向する位置になるように設けられていることを特徴とする作業用鞘管。 - 前記バレル内に挿入された状態で、前記バレルと前記周壁との隙間において前記挿通孔を囲むようにリング状に設けられて、当該リングの内外を仕切る仕切り部材を備えていることを特徴とする請求項1記載の作業用鞘管。
- 前記仕切り部材が、前記挿通孔の周縁乃至その近傍から筒状に立設された立設部と、該立設部に外嵌されるパッキンと、を備え、
前記バレル内に挿入された状態で、前記パッキンが前記バレルの内周面に密着された状態となることを特徴とする請求項2記載の作業用鞘管。 - 前記バレル内に挿入された状態で、前記バレルの径方向の位置決めをする位置決め部が、前記バレル内への挿入方向側の端部に設けられていることを特徴とする請求項1乃至請求項3のうちいずれか一項記載の作業用鞘管。
- 前記バレル内に挿入された状態で、前記バレルに対する傾きを補正する傾き補正部が、前記周壁において、前記挿通孔と対向する位置に設けられていることを特徴とする請求項1乃至請求項4のうちいずれか一項記載の作業用鞘管。
- 前記作業空間の酸素濃度を測定する酸素濃度計が設けられていることを特徴とする請求項1乃至請求項5のうちいずれか一項記載の作業用鞘管。
- 前記作業空間の可燃性ガスを検知するガス検知器が設けられていることを特徴とする請求項1乃至請求項6のうちいずれか一項記載の作業用鞘管。
- 請求項1乃至請求項7のうちいずれか一項記載の作業用鞘管を用いて前記ポンプ吐出配管の改修作業をするための環境整備方法であって、
前記タンクから前記バレル内への流路を遮断する遮断工程と、
前記バレル内に前記作業用鞘管を挿入して、前記挿通孔が前記ポンプ吐出配管の開口と対向するように配置する鞘管配置工程と、
前記ポンプ吐出配管の前記バレルから離れた側から前記バレルに向けて不活性ガスを放出し、前記作業空間内を不活性ガスでパージするパージ工程と、
前記閉塞部材を前記挿通孔から挿通させて、前記ポンプ吐出配管内に挿入することで、前記ポンプ吐出配管を閉塞するポンプ吐出配管閉塞工程と、
を順次行うことを特徴とするポンプ吐出配管の改修作業をするための環境整備方法。 - 前記閉塞部材が、ヘキサプラグであることを特徴とする請求項8記載のポンプ吐出配管の改修作業をするための環境整備方法。
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AU2016237529A AU2016237529B2 (en) | 2015-03-20 | 2016-03-15 | Working sheath tube and environmental maintenance method for renovating operation of pump-discharge pipe |
US15/559,347 US10598313B2 (en) | 2015-03-20 | 2016-03-15 | Working sheath tube and environmental maintenance method for renovating operation of pump-discharge pipe |
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JP2015057306A JP6516523B2 (ja) | 2015-03-20 | 2015-03-20 | 作業用鞘管、及び、ポンプ吐出配管の改修作業をするための環境整備方法 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0571600U (ja) * | 1992-02-28 | 1993-09-28 | 石川島播磨重工業株式会社 | ポンプバレルのパージ装置 |
JP2012154077A (ja) * | 2011-01-25 | 2012-08-16 | Taiyo Industry Kk | マンホール改修工法及びマンホール改修構造 |
JP2013167564A (ja) * | 2012-02-16 | 2013-08-29 | Shimizu Corp | 閉塞部材 |
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US3068561A (en) * | 1957-11-20 | 1962-12-18 | Wayne W Jones | Method of installing a flexible tank liner |
US3623629A (en) * | 1969-02-27 | 1971-11-30 | John A Hendershot | Tank liner |
US5505327A (en) * | 1994-01-18 | 1996-04-09 | Witt; F. C. | Flexible lined tank with vacuum in the manway |
GB0313483D0 (en) * | 2003-06-11 | 2003-07-16 | Boc Group Plc | Liquefied gas storage installation |
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2016
- 2016-03-15 WO PCT/JP2016/058146 patent/WO2016152653A1/ja active Application Filing
- 2016-03-15 AU AU2016237529A patent/AU2016237529B2/en active Active
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0571600U (ja) * | 1992-02-28 | 1993-09-28 | 石川島播磨重工業株式会社 | ポンプバレルのパージ装置 |
JP2012154077A (ja) * | 2011-01-25 | 2012-08-16 | Taiyo Industry Kk | マンホール改修工法及びマンホール改修構造 |
JP2013167564A (ja) * | 2012-02-16 | 2013-08-29 | Shimizu Corp | 閉塞部材 |
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US20180112830A1 (en) | 2018-04-26 |
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