WO2012096334A1 - Corps flottant - Google Patents

Corps flottant Download PDF

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Publication number
WO2012096334A1
WO2012096334A1 PCT/JP2012/050446 JP2012050446W WO2012096334A1 WO 2012096334 A1 WO2012096334 A1 WO 2012096334A1 JP 2012050446 W JP2012050446 W JP 2012050446W WO 2012096334 A1 WO2012096334 A1 WO 2012096334A1
Authority
WO
WIPO (PCT)
Prior art keywords
floating
floating body
gap
sides
main body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/050446
Other languages
English (en)
Japanese (ja)
Inventor
邦治 醍醐
俊雄 仙田
昭文 松苗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Honshu Seikan Co Ltd
Original Assignee
Nippon Steel Corp
Honshu Seikan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp, Honshu Seikan Co Ltd filed Critical Nippon Steel Corp
Priority to US13/978,838 priority Critical patent/US20130284741A1/en
Priority to RU2013132012/12A priority patent/RU2553197C2/ru
Priority to EP12734557.7A priority patent/EP2664561A4/fr
Priority to CN201280004988.8A priority patent/CN103298714B/zh
Priority to JP2012530018A priority patent/JP5405670B2/ja
Publication of WO2012096334A1 publication Critical patent/WO2012096334A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
    • B65D88/42—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle
    • B65D88/50—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle with resilient foam or stuffed seal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/22—Safety features

Definitions

  • the present invention relates to a floating body used for a floating roof of a floating roof type storage tank for storing petroleum products such as crude oil and gasoline.
  • a floating roof type storage tank is generally known as a tank for storing a flammable liquid such as oil.
  • This type of floating roof type storage tank has a structure in which a floating roof formed of a steel plate or the like is floated on this liquid so as to cover the liquid level of flammable liquid such as oil stored in the tank. .
  • the floating roof has a pontoon having a hollow (floating chamber) inside, and the entire floating roof floats in a liquid by the buoyancy of the pontoon.
  • the floating roof also moves up and down following the change in the liquid level due to the increase or decrease of the liquid stored in the tank, and the state where the liquid level of the stored liquid is always covered with the floating roof is maintained.
  • the pontoon of the floating roof formed of a steel plate may be damaged from the welded portion or the like due to vibration caused by sloshing (liquid level vibration) or the like.
  • sloshing liquid level vibration
  • Patent Document 1 and Patent Document 2 even if the pontoon is damaged in this way and the liquid in the tank enters the pontoon, in order to maintain an appropriate buoyancy, It has been proposed to accommodate (floating). By accommodating the floating body in the pontoon in this way, even if liquid enters the pontoon, the entire floating roof is maintained in a state of floating in the liquid in the tank by the buoyancy of the floating body itself.
  • the conventional floating body since the conventional floating body has a hermetically sealed structure, there is a risk that the internal gas expands due to heating during a fire and breaks, and further, there is a risk that the gas will shrink due to cooling after extinguishing. For this reason, the conventional floating body may not be able to maintain an appropriate buoyancy due to a temperature change during a fire.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a floating body that is excellent in fire resistance and can maintain an appropriate buoyancy even if there is a temperature change in the surrounding environment.
  • One aspect of the present invention is a floating body that is accommodated in a floating chamber of a floating roof of a floating roof tank, and is made of a metal body that has an opening at least at one location and has an internal space. And a metal lid that covers the opening and has an edge attached to the opening by winding, and an external space of the main body between the opening and the edge.
  • a first gap that communicates with the internal space and allows an approaching and separating operation between the main body and the lid; and the first gap when the lid is closest to the main body. And a first abutting portion for blocking.
  • the main body forms a cylinder having a pair of the openings; the lid body is fastened to each of the openings of the cylinder.
  • the first gap is provided between one of the lids and one of the openings to which the one lid is attached, and between the other of the lids and the other of the openings.
  • the first contact portion is provided; a configuration may be employed.
  • the floating body according to (1) or (2) may be a metal square can in which the cylindrical body is square and each lid body is square.
  • the opening of the main body You may employ
  • the opening and the edge, wherein the first contact portion is formed in an annular shape along the opening. The line contact part between parts may be sufficient.
  • the number of windings may be two or more.
  • the first gap is A plurality of linear gap portions along the approaching / separating direction, and a folded back gap portion that folds the linear gap portions together to connect each other;
  • the average gap size of these linear gap portions is in the range of 100 ⁇ m or more and 175 ⁇ m or less; the configuration may be adopted.
  • the plate thickness of the main body is in the range of 0.20 mm to 0.32 mm; the plate thickness of the lid is 0 Within the range of 20 mm to 0.32 mm; a configuration may be employed.
  • the main body is formed by bending a rectangular metal plate into a cylindrical shape and joining two opposite sides; Joining is performed by tightening, and the inner space and the outer space of the main body are communicated between the two tightened sides, and an approaching and separating operation between the two sides is allowed.
  • a configuration may be adopted in which a second gap is provided; and a second contact portion that blocks the second gap when the two sides are closest to each other.
  • the number of windings between the two sides may be two or more.
  • the second contact portion may be a line contact portion between the two sides.
  • Another aspect of the present invention is a floating body accommodated in a floating chamber of a floating roof of a floating roof type tank, and a rectangular metal plate is folded into a cylindrical shape and two opposite sides are joined to each other. A main body; a lid fixed to cover the opening of the main body, and the joining is performed by tightening, and the inner space of the main body and the exterior are between the two tightened sides.
  • the number of windings between the two sides may be two or more.
  • the third contact portion may be a line contact portion between the two sides.
  • the floating body according to the aspect described in (1) of the present invention it is excellent in fire resistance and can maintain proper buoyancy even if there is a temperature change in the surrounding environment.
  • the floating body of this aspect is metal, it is excellent in fire resistance so that it cannot compare with the conventionally proposed resin floating body.
  • the problem of the present application cannot be solved simply by making the conventionally proposed resin floating body simply made of metal. That is, assuming a metal floating body that is simply sealed with air inside to obtain buoyancy, on the other hand, when heated by a flame such as when a fire occurs, the air sealed inside It cannot be forbidden that the internal pressure rises due to heating.
  • this adjustment function is achieved only by tightening without using extra parts such as a safety valve, so it can be manufactured at low cost and contributes to the weight reduction of the floating body itself. is doing.
  • the liquid now acts as an external pressure on the floating body. Then, the lid body that has been subjected to the external pressure performs a slight approach operation as if pressed against the main body, and as a result, the first gap is automatically blocked at the first contact portion. Therefore, since air is sealed in the internal space of the floating body, sufficient buoyancy can be obtained.
  • the floating roof using the floating body of the above aspect even if there is a required temperature change in the floating chamber, there is less deformation such as expansion and contraction, and appropriate buoyancy can be achieved.
  • a plurality of floating bodies that can be maintained are accommodated. Therefore, even if the floating chamber is damaged due to a fire or the like, the floating roof can be maintained in the liquid stored in the floating roof type tank by the buoyancy of the floating body.
  • FIG. 1 is a longitudinal sectional view showing a floating roof 200 in which the floating body 10 according to the first embodiment of the present invention is accommodated in a pontoon 220 and a floating roof type tank 100.
  • reference sign CL indicates the central axis of the floating roof tank 100.
  • a liquid storage product OL such as petroleum products is stored in a bottomed cylindrical floating roof tank 100 of the present embodiment, and floats on the liquid surface of the liquid storage product OL.
  • the roof 200 is floating.
  • the floating roof 200 is formed of a steel plate, and is formed in a ring shape along the peripheral edge of the upper surface of the roof main body 210, and when viewed from the longitudinal section, the floating roof 200 is outward from the center of the ring.
  • a pontoon 220 that gradually increases in height.
  • the pontoon 220 is arranged so as to be coaxial with the outer wall 220a, which is a cylindrical outer wall 220a that is welded and fixed to the roof main body 210 so as to stand vertically upward from the peripheral edge thereof.
  • a cylindrical inner wall 220b welded and fixed so as to stand vertically above the upper surface and a space between the outer wall 220a and the inner wall 220b are welded and fixed to the upper edges of the outer wall 220a and the inner wall 220b.
  • the pontoon 220 has a floating chamber E that is a ring-shaped cavity formed therein, and buoyancy can be generated by the air confined in the floating chamber E. Therefore, due to the buoyancy of the pontoon 220, the entire floating roof 200 floats over the upper surface of the liquid storage product OL stored in the floating roof tank 100.
  • a predetermined gap G is provided between the outer peripheral surface 222 of the pontoon 220 and the inner peripheral surface 101 of the floating roof type tank 100.
  • a ring-shaped seal 221 is provided so as to be sandwiched in the gap G, and the upper opening of the floating roof tank 100 is sealed by filling the gap G.
  • the seal 221 has a structure in which, for example, a cover sheet such as nitrile rubber (NBR: Nitrile Butadiene Rubber) or fluorine rubber is formed in a floating ring shape and fixed to the outer peripheral surface 222 of the floating roof 200 (pontoon 220).
  • the cover sheet has a compressed urethane foam.
  • a large number of floating bodies 10 are accommodated in the floating chamber E of the pontoon 220.
  • these floating bodies 10, 18 liter cans made of metal and having a square shape (cuboid shape) are employed in the present embodiment.
  • Such rectangular floating bodies 10 are accommodated in the floating chamber E of the pontoon 220 in a state where a plurality of rows of the floating bodies 10 are arranged and stacked in a plurality of stages.
  • a large number of floating bodies 10 can be accommodated in the floating chamber E with little spatial loss.
  • the buoyancy of the floating roof 200 can be sufficiently secured even when the liquid storage product OL enters the floating chamber E.
  • Each floating body 10 is moved into and out of the floating chamber E from a manhole 223 formed on, for example, the upper wall 220c of the pontoon 220, so that the floating body E can be moved into and out of the floating chamber E for installation or maintenance. It is possible to take out.
  • the floating bodies 10 in the floating chamber E of the pontoon 220 they may be simply stacked and may be bundled together so that the arrangement does not collapse.
  • each floating body 10 after being bound may be fixed to an inner wall such as a bottom wall in the floating chamber E.
  • these bundling and fixing are not indispensable for exerting the buoyancy of the floating body 10, the present embodiment illustrates a configuration in which these bundling and fixing are not performed.
  • a large number of floating bodies 10 are accommodated in the floating chamber E of the pontoon 220.
  • the floating body 10 itself is hollow and lightweight, the buoyancy of the pontoon 220 as a whole can be maintained.
  • the specific structure of the floating body 10 will be described later.
  • FIG. 2 shows that the seal 221 is damaged and lost due to vibration caused by sloshing (liquid level vibration) or the like in the floating roof tank 100 shown in FIG. 4 is a longitudinal sectional view showing a state in which a liquid storage product OL has entered a floating chamber E.
  • FIG. 4 is a longitudinal sectional view showing a state in which a liquid storage product OL has entered a floating chamber E.
  • the weight of the floating roof 200 can be supported by the buoyancy of each floating body 10, so that the floating roof 200 remains floating in the liquid storage OL even when the liquid storage OL enters the pontoon 220. it can. That is, even if the liquid storage product OL enters the pontoon 220, it is possible to leave the entire surface of the liquid storage product OL covered with the floating roof 200 except for the gap G.
  • the floating roof 200 is stored in the floating roof tank 100 even if the pontoon 220 is damaged due to sloshing or the like and the liquid storage OL enters the floating chamber E. It is required to float while covering the upper surface of the OL. Further, even if a fire occurs in this state, the floating roof 200 is required to float over the liquid level of the liquid storage product OL stored in the floating roof tank 100. In order to satisfy these requirements, the floating body 10 itself accommodated in the floating chamber E of the pontoon 220 is required to satisfy both airtightness and fire resistance.
  • the floating body 10 (metal can) is made of a thin metal plate (for example, tin-plated steel plate, tin-free steel, etc.), and is a rectangular tube body (metal) with curved portions formed at four corners. And a pair of lid plates 12 and 13 (metal end plates forming a lid), which are also made of a thin metal plate, are integrally combined.
  • a thin metal plate for example, tin-plated steel plate, tin-free steel, etc.
  • lid plates 12 and 13 metal end plates forming a lid
  • Each of the cover plates 12 and 13 has the same shape as each other, and has a quadrangular shape in which the four corners are curved so as to match the shape of the opening 11x of the rectangular cylindrical body 11.
  • the lid plate 12 is joined so as to close the upper opening portion 11x of the rectangular cylindrical body 11, while the lid plate 13 is joined so as to close the lower opening portion 11x of the rectangular cylindrical body 11. In this way, by closing the upper and lower openings 11x of the rectangular cylinder 11 with the cover plates 12 and 13, air can be enclosed in the floating body 10.
  • each of the four side wall surfaces 11 y of the rectangular cylindrical body 11 On each of the four side wall surfaces 11 y of the rectangular cylindrical body 11, a pair of longitudinal reinforcing beads 111 formed between the upper and lower openings 11 x and a pair extending in a direction intersecting the longitudinal reinforcing beads 111.
  • the horizontal reinforcing beads 112 and the rectangular reinforcing portions 113 (commonly called picture frames) formed so as to be surrounded by the vertical reinforcing beads 111 and the horizontal reinforcing beads 112 are formed by pressing.
  • Each of the four side wall surfaces 11y is reinforced by the formation of the vertical reinforcing beads 111, the horizontal reinforcing beads 112, and the rectangular reinforcing portions 113, and as a result, the entire rectangular cylindrical body 11 is structurally reinforced.
  • the square cylinder 11 and the cover plate 12 are joined together by, for example, winding shown in FIGS. 4A and 4B.
  • the other cover board 13 is not demonstrated in particular, it is joined to the square cylinder 11 by the double winding fastening similar to the cover board 12.
  • the one opening portion 11x of the rectangular cylindrical body 11 expands while gently curving from the inside toward the outside.
  • a flange 11a is formed.
  • the edge portion 12x of the cover plate 12 has an inclined portion 12x1 that rises obliquely upward along the inner surface of the flange 11a, and a parallel portion 12x2 that continues to the inclined portion 12x1 and is substantially parallel to the central portion of the cover plate 12.
  • a curled portion 12x3 that is continuous with the parallel portion 12x2 and is bent in an arc shape so as to go from the upper side to the lower side of the flange 11a.
  • the said longitudinal reinforcement bead 111 (refer FIG. 3A) in which a front-end
  • FIG. 4B shows a state after the double winding is performed in this manner.
  • a winding portion 18 is formed at a joint portion between the opening portion 11 x of the rectangular tube body 11 and the edge portion 12 x of the cover plate 12.
  • the portion of the vertical reinforcing bead 111 in the tightening portion 18 is crushed and further flattened during the tightening.
  • both ends of the longitudinal reinforcing bead 111 are processed flat by the above-described processing of the flange 11a and the above-described winding tightening, and the portion between the ends flattened in this way, that is, the winding is tightened.
  • the part other than the part keeps the original dent and functions as a longitudinal reinforcing bead 111 for reinforcement.
  • the opening 11x of the rectangular cylinder 11 after double winding is an inclined part that is inclined obliquely from the inside of the square cylinder 11 to the outside.
  • 11x1 a first linear portion 11x2 that is continuous with the inclined portion 11x1 and is linearly formed along the longitudinal direction (vertical direction) of the rectangular cylindrical body 11, and a linear cylindrical body 11 that is continuous with the first linear portion 11x2.
  • the edge portion 12x of the lid plate 12 after double winding is bent from the center portion of the lid plate 12 toward the longitudinal direction (vertical direction) of the rectangular cylinder 11.
  • a portion 12x4 a third straight portion 12x5 continuous with the second bent portion 12x4 and linearly formed in the longitudinal direction, and continuous with the third straight portion 12x5 and externally from the inside of the rectangular cylindrical body 11
  • a third bent portion 12x6 folded back in a U-shape toward the direction, a fourth straight portion 12x7 connected to the third bent portion 12x6 and linearly formed along the longitudinal direction (vertical direction)
  • the fourth bent portion 12x8 communicates with the fourth linear portion 12x7 and is folded back in a U-shape from the outside to the inside of the rectangular cylindrical body 11, and continues to the fourth bent portion 12x8.
  • double winding refers to a method in which the curled portion 12x3 of the cover plate 12 is wound around the flange 11a of the quadrangular cylinder 11, and is crimped and joined. Since the cover plate 12 and the rectangular cylinder 11 are doubled, it is called double winding. And in this coiling
  • the gap 151a that directly communicates with the internal space of the rectangular cylinder 11 and has a curved shape, and the longitudinal direction of the square cylinder 11 that is continuous with the gap 151a.
  • a linear gap 151 extending in the (vertical direction), a gap 154a continuous with the gap 151 and folded back in a U-shape from the inside of the rectangular cylinder 11 to the outside, and continued to the gap 154a.
  • a linear gap 154 extending along the longitudinal direction, a gap 153a continuous with the gap 154 and folded back in a U shape from the outside toward the inside, and a gap 153a continuous with the gap 153a.
  • the gap 152a returning Ri includes said longitudinal direction extends along a linear gap 152 to further direct communication with the outer space of the rectangular tube body 11 with connected to the gap 152a, the.
  • the floating body 10 When the pontoon 220 is damaged and the liquid storage product OL enters the floating chamber E, the floating body 10 receives an external pressure P1 from the surroundings by the liquid storage product OL filling the external space as shown in FIG. 6A. Since the external pressure P1 is applied to the outer surface of the cover plate 12, the edge 12x of the cover plate 12 is pressed against the opening 11x of the rectangular cylinder 11, so that a part of the gap path (the contact portion 161 shown in the drawing) 162), line contact occurs along the shape of the opening 11x, and as a result, the gap path is blocked. By this blocking, it is possible to suppress as much as possible the liquid storage product OL that fills the periphery of the floating body 10 from entering the internal space of the floating body 10, and thus the buoyancy of the floating body 10 is maintained.
  • the floating body 10 when a fire occurs and the floating body 10 is heated from the surroundings, as shown in FIG. 6B, the air confined in the inside is also heated to increase the pressure (internal pressure P2). Due to the internal pressure P2, the edge 12x of the cover plate 12 tends to be slightly separated from the opening 11x of the rectangular cylindrical body 11, so that the gap path is blocked (locations 161 and 162 described above). A gap is formed. As a result, the substantially spiral gap path that communicates between the internal space and the external space of the floating body 10 is formed, and the pressure increase in the internal space can be reliably released (exhausted) to the external space. . Therefore, the floating body 10 can maintain its buoyancy without being damaged.
  • a sealing material is put in portions corresponding to the inclined portion 12x1, the parallel portion 12x2, and the curled portion 12x3 of the lid plate 12, and then the lid
  • the plate 12 and the rectangular tube body 11 are wound and the four gaps 151 to 154 formed in the wound portion 18 are filled with the sealing material to improve the sealing performance.
  • the sealing material is used because the function as a container cannot be exhibited at all when the liquid stored in the metal can leaks, and there is no structure without the sealing material.
  • a sealing material in the inclined portion 12x1, the parallel portion 12x2, and the curled portion 12x3 of the lid plate 12 on the contrary. Absent. This is because if the sealing material is inserted, the gaps 151 to 154 are filled with the sealing material after winding. Normally, metal cans are used as containers, so a sealing material is essential. However, in the floating body 10 of the present embodiment, conversely, a gap is positively formed without using a sealing material. A configuration that cannot be conceived is adopted.
  • the gap sizes of the four gaps 151 to 154 can be adjusted by increasing or decreasing the tightening pressure by the double tightening machine.
  • the tightening thickness dimension T (hereinafter simply referred to as the T dimension) of the tightening portion 18 shown in FIG. 5 decreases and the clearance dimensions of the four clearances 151 to 154 decrease.
  • the T dimension of the tightening portion 18 is increased, and the clearance dimensions of the four clearances 151 to 154 are increased.
  • the four gaps 151 to 154 in the winding portion 18 serve as a gas (air) flow path between the internal space and the external space of the floating body 10 forming a metal can.
  • the floating roof tank is made while minimizing the intrusion of the liquid storage OL (liquid) as much as possible (maintaining buoyancy as much as possible).
  • the deformation of expansion and contraction of the floating body 10 due to heating at the time of 100 fires and cooling after quenching can be suppressed as much as possible.
  • the average gap size (thickness) of the gaps 151, 152, 153, and 154 in the plane cross section at the 2 ⁇ ML position) is defined as follows.
  • the thickness of the rectangular cylinder 11 is S 1 in the unit of mm
  • the plate thickness of the cover plates 12 and 13 is the unit of S 2 in the unit of mm
  • the thickness of the tightening portion 18 is T in the unit of mm
  • the tightening is R
  • the thickness T of the tightening portion 18 was changed by 0.10 mm within a range of 1.70 mm to 2.70 mm.
  • the floating body 10 was immersed in water and left for 48 hours. Then, the amount of water that entered the internal space of the floating body 10 after 48 hours was measured. As the amount of water immersion, the test was performed 5 times, and the average value was obtained.
  • Table 1 shows the thickness T of the tightening portion 18, the average gap size G calculated from Equation 1 above, and the amount of water immersion.
  • Table 2 shows the relationship between the amount of water injected into the internal space of the floating body 10 and the submergence depth of the floating body 10, which was performed for confirmation.
  • the submergence depth of the floating body 10 represents the degree of sinking when the floating body 10 in which an arbitrary amount of water has been poured into the internal space is left in the water, and is the most of the three sides of the floating body 10 described above. The depth is expressed by how long a long side (350.0 mm) is submerged from the water surface.
  • the floating body 10 that has been poured (submerged) by about 500 ml has substantially the same submerged depth as compared with the floating body 10 that is not poured. That is, with a water injection amount (submerged amount) of about 500 ml, the floating body 10 can maintain sufficient buoyancy without affecting the buoyancy of the floating body 10.
  • the floating bodies 10 shown in Table 1 in which the thickness T of the tightening portion 18 is 1.70 mm to 2.70 mm have sufficient buoyancy.
  • the floating body 10 having a thickness T of the tightening portion 18 of 2.20 mm or less (an average gap dimension G of 175 ⁇ m or less) is preferable because the buoyancy can be maintained by making the water immersion as small as possible.
  • the upper plate of the pontoon 220 was cooled with water, and the upper plate of the pontoon 220 was opened to rapidly cool the inside of the pontoon 220 in the air. As a result, it was rapidly cooled at 400 ° C. for about 9 minutes from when natural fire extinguishes (floating body temperature 700 ° C.) to when the upper plate of the pontoon 220 was opened (floating body temperature 300 ° C.). It was. However, some shrinkage deformation occurred in the floating body 10 while the upper plate of the pontoon 220 was opened and the inside of the pontoon 220 was rapidly cooled in the air. However, this contraction deformation is not contraction enough to reduce the buoyancy of the floating body 10.
  • the distribution path of gas (air) becomes wider. Therefore, expansion and contraction deformation of the floating body 10 during heating and cooling are reduced.
  • the performance required for the floating body 10 depends on whether emphasis is placed on buoyancy (sealing performance) or expansion / shrinkage deformation (air permeability) during heating and cooling. It is preferable to set the dimension and the average gap dimension G. All of the floating bodies 10 used in the above-described tests satisfy the performance related to the buoyancy (sealing property) and the expansion / contraction deformation (air permeability) required for the floating body 10. However, when the performance of either sealing performance or air permeability is regarded as important, the T dimension and the average gap dimension G of the floating body 10 may be appropriately set according to the request. As a result, deformation such as expansion and contraction due to temperature changes during a fire is reduced, and proper buoyancy can be maintained for a long period of time.
  • the floating body 10 (18 liter square can) used in the above test has a smaller amount of liquid ingress while ensuring a certain degree of gas (air) air permeability. Therefore, the T dimension is preferably 1.90 mm or more and 2.20 mm or less, that is, the average gap dimension G is 100 ⁇ m or more and 175 ⁇ m or less.
  • the dimension is 2.1 mm or more and 2.2 mm or less, that is, the average gap dimension G is 150 ⁇ m or more and 175 ⁇ m or less.
  • the preferable range of the T dimension is a value that varies depending on the thickness of the rectangular cylinder 11 and the cover plates 12 and 13 used for the floating body 10 and the number of windings. Since the range of the average gap dimension G is the average dimension (thickness) of the gap, it is a value that does not depend on the plate thickness, the number of windings, etc. of the floating body 10. Therefore, when using the floating body 10 having a plate thickness and the number of windings other than those used in the above test, the average gap dimension G of the floating body 10 is controlled to be within the above-described preferable range. That's fine.
  • a metal can (18 liter square can) was used as the floating body 10, but the present invention is not limited to this, and a metal body having a fire resistance and a metal lid are wound together. Any structure may be used as long as the internal space is hollow.
  • the winding with which the square cylinder 11 (metal cylinder) and the cover plates 12 and 13 (metal end plate) are double-tightening (the number of turns is 2).
  • the number of windings of the floating body 10 is not limited to this, and the number of windings may be changed as necessary.
  • both the two opening parts 11x of the square cylinder 11 are used as the cover plates 12 and 13 using the square cylinder 11 and the cover plates 12 and 13 which have a pair of opening part 11x.
  • the floating body 10 was formed.
  • the floating body 10 is not limited to two places to be tightened, and it is sufficient that an opening is formed at least at one place and the space between the main body having the internal space and the lid body is tightened. In this case, since the overall length of the gap formed annularly along the opening 11x of the floating body 10 changes, the average gap dimension G may be controlled accordingly.
  • each of the rectangular cylinder 11 and the cover plates 12 and 13 is not limited to the plate thickness used in the above test (the tube thickness 0.27 mm and the lid plate thickness 0.32 mm), and as necessary. May be changed. However, it is preferable that each of the plate thickness of the rectangular cylinder 11 and the plate thicknesses of the cover plates 12 and 13 is 0.20 mm to 0.32 mm. When a material having a thickness within this range is used, it is possible to manufacture the floating body 10 by winding the rectangular tube body 11 and the cover plates 12 and 13 using an existing can manufacturing process manufacturing apparatus. . Therefore, the capital investment cost can be suppressed and the manufacturing cost can be reduced.
  • the rectangular (cuboid) floating body 10 is used, but the shape of the floating body 10 is not limited to this.
  • the shape of the floating body 10 may be a round shape (cylindrical shape such as a drum can) or other shapes.
  • the plurality of floating bodies 10 can be accommodated in the floating chamber E of the pontoon 220 with less spatial loss. Therefore, it is preferable because a larger buoyancy of the pontoon 220 can be secured.
  • the floating body 10 of the present embodiment described above is summarized below.
  • the floating body 10 of this embodiment is accommodated and used in the floating chamber E of the floating roof 200 of the floating roof type tank 100.
  • the opening part 11x is formed in two places, and the metal square cylinder 11 (main body) which has internal space, and the opening part 11x are covered, and the edge part 12x is wound around this opening part 11x.
  • Attached metal lid plates 12 and 13 (lid body) are provided. And between the opening part 11x and the edge part 12x, between the external space of the square cylinder 11 (main body) and the said internal space, the square cylinder 11 (main body) and the cover plates 12 and 13 are communicated.
  • the gap path (first gap) that allows the approaching / separating operation between the (cover bodies); and the gap path (when the lid plates 12 and 13 (cover body) are closest to the rectangular cylinder 11 (main body))
  • Contact portions 161 and 162 (first contact portions) that block the first gap) are provided.
  • the square cylinder 11 (main body) has comprised the cylinder which has a pair of opening part 11x.
  • lid plates 12 and 13 lid bodies
  • the gap path (the first path) between both the lid plate 12 and the one opening 11x to which the lid plate 12 is attached and between the lid plate 13 and the other opening 11x to which the lid plate 13 is attached.
  • a clearance) and contact portions 161 and 162 are provided.
  • the floating body 10 of the present embodiment is a metal square can in which the cylindrical body 11 is square and the lid plates 12 and 13 (lid bodies) form a quadrangle.
  • the tightening portion 18 (the portion to be tightened) is viewed in the cross section of FIG. 5 including the approaching and separating direction, the opening 11x of the rectangular cylinder 11 (main body) and the cover plate 12, 13 (lid) 12x is engaged with the edge 12x.
  • each of the contact parts 161, 162 (first contact part) is formed in a ring shape along the opening part 11x, and the line contact part between the opening part 11x and the edge part 12x. It is.
  • the number of windings of the winding is 2. As described above, the number of windings may be further increased as necessary.
  • the thickness of the rectangular cylinder 11 (main body) is in the range of 0.20 mm to 0.32 mm. Further, the plate thicknesses of the cover plates 12 and 13 (lid bodies) are in the range of 0.20 mm to 0.32 mm.
  • the floating body 10 which concerns on 2nd Embodiment of this invention is demonstrated below.
  • the structure of the rectangular cylinder 11 (main body) is particularly different from that of the first embodiment. Therefore, the differences will be mainly described, and the other structures are assumed to be the same as those of the first embodiment. A duplicate description is omitted.
  • the rectangular cylinder 11 of the first embodiment has a structure in which a rectangular metal plate is bent and formed into a quadrangular rectangular shape, and then two opposite sides are overlapped and welded. As described above, in this embodiment, winding is used instead of welding. This will be described below with reference to FIGS. 7B and 7C.
  • the rectangular cylinder 11 has a cylindrical shape having a pair of the opening portions 11x by connecting the opposing two sides 19x and 19y of the rectangular metal plate 19 to each other. Yes. Then, this connection is a tightening, and the two sides 19x, 19y that communicate with each other between the inner space and the outer space of the rectangular cylindrical body 11 between the two sides 19x, 19y that are tightened are opposed to each other.
  • a cylindrical gap 20 that allows an approaching / separating operation therebetween and cylindrical contact portions 211 and 212 that block the cylindrical gap 20 when the opposing two sides 19x and 19y are closest to each other are provided.
  • the number of windings is 2 or more, this embodiment illustrates double winding. You may change the winding number of winding as needed.
  • a sealing material is similarly applied to the rectangular cylinder 11 itself.
  • the winding structure which provided the clearance gap without interposing is employ
  • the air pressure in the internal space can be more reliably discharged by heating received in the event of a fire or the like. That is, as shown in FIG. 7B, for example, when the pontoon 220 is damaged and the liquid storage product OL enters the floating chamber E, the floating body 10 applies an external pressure from the surroundings by the liquid storage product OL filling the external space. receive.
  • the rectangular cylinder 11 Since the two sides 19x and 19y of the rectangular cylinder 11 are pressed by this external pressure, the rectangular cylinder 11 has a portion of the cylindrical gap 20 (the cylinder abutting portions 211 and 212 shown in the drawing). Line contact along the longitudinal direction occurs, and as a result, communication between the internal space and the external space of the rectangular tube 11 is blocked. By this blocking, it is possible to suppress as much as possible the liquid storage product OL that fills the periphery of the floating body 10 from entering the internal space of the floating body 10, and thus the buoyancy of the floating body 10 is maintained. Moreover, as shown in FIG. 7C, for example, when a fire occurs and the floating body 10 is heated from the surroundings, the air confined in the internal space is also heated to increase the pressure.
  • the two sides 19x and 19y of the rectangular cylinder 11 which are wound up tend to be slightly separated from each other, so that a gap is formed at the blocked location (the locations of the above-mentioned reference numerals 211 and 212). .
  • the substantially spiral cylindrical gap 20 that communicates between the internal space and the external space of the floating body 10 is formed, and the pressure in the internal space is reliably released (exhausted) to the external space. Can do. Therefore, the floating body 10 can maintain its buoyancy without being damaged. Even if the separation distance is very small, air (gas) has a lower viscosity than the liquid storage product OL (liquid) and can be easily ventilated.
  • the floating body 10 of the present embodiment described above adopts the following configuration in addition to the configuration of the first embodiment.
  • the rectangular cylinder 11 (main body) is formed by folding a rectangular metal plate 19 into a rectangular cylinder and joining two sides 19x and 19y facing each other. Furthermore, this joining is made by winding, and the space between the two sides 19x and 19y thus tightened is communicated between the internal space and the external space of the rectangular cylinder 11 (main body), and the two sides
  • the cylinder gap 20 (second gap) that allows an approaching and separating operation between 19x and 19y and the two sides 19x and 19y are closest to each other, the cylinder gap 20 (second gap) is blocked. Cylinder contact portions 211 and 212 (second contact portions) to be provided.
  • the number of windings between the two sides 19x and 19y is two. As described above, the number of windings may be further increased as necessary.
  • the cylindrical body contact portions 211 and 212 (second contact portions) are line contact portions between the two sides 19x and 19y.
  • the rectangular cylinder 11 may employ a configuration in which the joining between the opposing two sides 19x and 19y of the rectangular metal plate 19 is joined by winding.
  • the cylinder gap 20 that allows the relative approaching and separating operation between the two opposite sides 19x and 19y and the cylinder that blocks the cylinder gap 20 when the two opposite sides 19x and 19y are closest to each other.
  • the contact portions 211 and 212 satisfy the performance of the buoyancy of the floating body 10 (sealing property when immersed in the pontoon) and suppression of expansion / contraction deformation (air permeability when heated from the surroundings).
  • the floating body 10 of the present modification is housed and used in the floating chamber E of the floating roof 200 of the floating roof type tank 100. Then, the rectangular metal plate 19 is folded into a quadrangular cylindrical shape, and the rectangular cylinder 11 (main body) in which two sides 19x and 19y facing each other are joined; and the opening 11x of the rectangular cylindrical body 11 (main body) is covered. A fixed lid plate 12, 13 (lid body); and the joining is performed by tightening, and the rectangular cylinder 11 (main body) is provided between the two sides 19x and 19y that are tightened.
  • a cylindrical gap 20 (third gap) that allows communication between the internal space and the external space and allows the approach and separation between the two sides 19x and 19y; and the two sides 19x and 19y are mutually connected
  • cylinder contact portions 211 and 212 (third contact portions) that block the cylinder gap 20 (third gap) when they are closest to each other.
  • the number of windings between the two sides 19x and 19y is 2 or more. As described above, the number of windings may be further increased as necessary.
  • the cylindrical contact portions 211 and 212 (third contact portions) are line contact portions between the two sides 19x and 19y.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Tents Or Canopies (AREA)

Abstract

La présente invention concerne un corps flottant contenu dans une chambre de flottabilité d'un toit de ponton dans un réservoir de type à toit flottant à ponton, et comportant: un corps principal métallique qui est formé avec une partie ouverte dans au moins un emplacement, et qui présente un espace intérieur ; et un couvercle métallique qui recouvre la partie ouverte, et qui présente une partie de bord qui est fixée par agrafage à la partie ouverte. Entre la partie ouverte et la partie de bord sont prévus un premier intervalle qui permet une communication entre un espace extérieur et l'espace intérieur du corps principal, et qui permet la jonction et la séparation entre le corps principal et le couvercle, et une première partie adjacente qui bloque le premier intervalle lorsque le couvercle se trouve à son point le plus proche du corps principal.
PCT/JP2012/050446 2011-01-14 2012-01-12 Corps flottant Ceased WO2012096334A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US13/978,838 US20130284741A1 (en) 2011-01-14 2012-01-12 Floating body
RU2013132012/12A RU2553197C2 (ru) 2011-01-14 2012-01-12 Плавающее тело
EP12734557.7A EP2664561A4 (fr) 2011-01-14 2012-01-12 Corps flottant
CN201280004988.8A CN103298714B (zh) 2011-01-14 2012-01-12 浮体
JP2012530018A JP5405670B2 (ja) 2011-01-14 2012-01-12 浮き体

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-005735 2011-01-14
JP2011005735 2011-01-14

Publications (1)

Publication Number Publication Date
WO2012096334A1 true WO2012096334A1 (fr) 2012-07-19

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ID=46507226

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PCT/JP2012/050446 Ceased WO2012096334A1 (fr) 2011-01-14 2012-01-12 Corps flottant

Country Status (6)

Country Link
US (1) US20130284741A1 (fr)
EP (1) EP2664561A4 (fr)
JP (1) JP5405670B2 (fr)
CN (1) CN103298714B (fr)
RU (1) RU2553197C2 (fr)
WO (1) WO2012096334A1 (fr)

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KR20200024872A (ko) * 2017-08-29 2020-03-09 포샨 순더 메이디 일렉트리컬 히팅 어플라이언시스 메뉴팩쳐링 코., 리미티드 조리 장치의 교반 장치 및 조리 장치

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KR102368719B1 (ko) * 2021-08-27 2022-02-25 손용엽 유류 저장 탱크의 플로팅 커버용 다각형 폰툰

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JPH0411991Y2 (fr) * 1986-06-02 1992-03-24
JPH04239489A (ja) * 1991-01-17 1992-08-27 Misawa Homes Co Ltd フロート蓋
JP4172846B2 (ja) * 1998-06-26 2008-10-29 株式会社フジタ 水位追従式水中ポンプ
JP4229235B2 (ja) * 2003-11-27 2009-02-25 株式会社石井鐵工所 浮屋根の浮力増強構造
JP2006026638A (ja) * 2004-07-12 2006-02-02 Honshu Seikan Kk 角形状缶
JP2006143291A (ja) 2004-11-22 2006-06-08 Idemitsu Eng Co Ltd 浮屋根式貯蔵タンク

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200024872A (ko) * 2017-08-29 2020-03-09 포샨 순더 메이디 일렉트리컬 히팅 어플라이언시스 메뉴팩쳐링 코., 리미티드 조리 장치의 교반 장치 및 조리 장치
KR102231456B1 (ko) 2017-08-29 2021-03-23 포샨 순더 메이디 일렉트리컬 히팅 어플라이언시스 메뉴팩쳐링 코., 리미티드 조리 장치의 교반 장치 및 조리 장치

Also Published As

Publication number Publication date
EP2664561A1 (fr) 2013-11-20
RU2553197C2 (ru) 2015-06-10
US20130284741A1 (en) 2013-10-31
RU2013132012A (ru) 2015-02-20
CN103298714B (zh) 2015-06-17
CN103298714A (zh) 2013-09-11
EP2664561A4 (fr) 2015-09-23
JP5405670B2 (ja) 2014-02-05
JPWO2012096334A1 (ja) 2014-06-09

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