CN110466899A - The sealing device of floating roof tank and application - Google Patents
The sealing device of floating roof tank and application Download PDFInfo
- Publication number
- CN110466899A CN110466899A CN201910912352.7A CN201910912352A CN110466899A CN 110466899 A CN110466899 A CN 110466899A CN 201910912352 A CN201910912352 A CN 201910912352A CN 110466899 A CN110466899 A CN 110466899A
- Authority
- CN
- China
- Prior art keywords
- floating roof
- roof tank
- floating
- sealing device
- flexible cylinder
- 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.)
- Pending
Links
- 238000007667 floating Methods 0.000 title claims abstract description 98
- 238000007789 sealing Methods 0.000 title claims abstract description 34
- 239000007791 liquid phase Substances 0.000 claims abstract description 30
- 229920001971 elastomer Polymers 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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
- B65D88/42—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle
- B65D88/48—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle with fluid means acting on the 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention belongs to large-scale floating roof tank technical fields, it is related specifically to a kind of sealing device of floating roof tank, including a flexible cylinder, the upper end fixed seal connection of the flexible cylinder is in the upper end of floating roof tank tank skin, the lower end of the flexible cylinder flips up inwardly and is sealedly and fixedly connected on the floating plate of floating roof tank, and flexible cylinder lower end flips up in the sandwiched area to be formed full of liquid phase assist medium.The present invention is that the dynamic sealing of annular space is become static seal at two, the variation of the seal face distance as caused by the expansion of rubber membrane and the movement of folding-compensation floating roof disk.Program structure is simple, of less demanding to storage tank cylinder ovality, good seal performance.
Description
Technical field
The invention belongs to large-scale floating roof tank technical field, it is related specifically to sealing device and the application of a kind of floating roof tank.
Background technique
Floating roof tank is divided to internal floating roof tank and two kinds of external floating top tank.Internal floating roof tank is exactly in general fixed tank plus one can
With the disk of floating to completely cut off the contact with volatile liquid phase medium with atmosphere.External floating top tank then without fixed top, floats
Top is directly exposed to outer.There is the interval of certain distance between floating plate and tank skin, forms the annular space in exposed liquid phase medium face.For
Contact of the liquid phase medium with atmosphere in isolation annular space prevents medium from volatilizing, and sealing device is arranged between floating plate and tank skin.
Floating roof tank sealing device mainly has mechanical device sealing, elastic foam or packing seal, fluid means sealing and magnetic means
Sealing.Floating roof tank sealing device is to ensure that one of safe handling key factor of floating roof tank.The sealing floated between top and tank skin
It is a kind of more special dynamic sealing, because not only there is elevating movement on top of floating, there are also horizontal shakings.This results in floating roof circle
Gap between disk and tank skin is variation, and this changes the ovality due to tank skin cylinder and increases.Existing sealing
Technology major defect is that structure is complicated, part is more, vulnerable part is more, thus influences sealing effect.
Summary of the invention
In view of the above technical problems, the purpose of the present invention is to provide a kind of sealing device of floating roof tank, which has
The characteristics of structure is simple, good seal performance.
To achieve the above object, the technical solution used in the present invention is:
A kind of sealing device of floating roof tank, it is characterised in that: including a flexible cylinder, the upper end of the flexible cylinder is fixed
It is sealedly connected on the upper end of floating roof tank tank skin, the lower end of the flexible cylinder flips up inwardly and is sealedly and fixedly connected in floating roof
On the floating plate of tank, flexible cylinder lower end is flipped up in the sandwiched area to be formed full of liquid phase assist medium.
Further, the lower end of the flexible cylinder and floating plate top edge are tightly connected.
Further, the edge of the floating plate lower surface is equipped with circular ring shape supporting walls, is used to support the flexibility flipped up
Cylinder.
Further, the density of the liquid phase assist medium is equal to the density of the liquid phase medium in floating roof tank.
Further, the liquid level of liquid phase assist medium is higher than floating plate upper surface in the sandwiched area；Table on the floating plate
Face is equipped with one and separates cylinder, for stopping liquid phase assist medium.
Further, the bottom of the sandwiched area is equipped with support annulus, for by the inside and outside flexible cylinder of sandwiched area
It struts；The outer diameter of the support annulus is equal to the thickness that tank skin internal diameter subtracts 2 times of flexible cylinders, supports the internal diameter of annulus to be equal to floating
Dish external diameter adds the thickness of 2 times of flexible cylinders.
Further, the support annulus is flexible annular airbag structure, and internal hydraulically full, global density is greater than liquid phase
The density of assist medium.
Further, the guiding device for preventing floating plate from rotating is equipped between the floating plate and floating roof tank.
Further, the guiding device is the coaxial sleeve of one group of rectangular section, and the coaxial sleeve includes inside and outside cloth
The inner sleeve and outer tube set, the outer tube is fixedly mounted on the center of floating roof tank abhiseca or fills the center at bottom, described interior
Casing is connect with floating plate center.
A kind of rubber membrane dry gas-holder, it is characterised in that: the sealing device including any of the above-described floating roof tank is used for
Seal rubber film dry gas-holder tank body and piston plate.
The invention has the benefit that the present invention is that the dynamic sealing of annular space is become static seal at two, by flexibility circle
The variation of seal face distance caused by the expansion of cylinder (rubber membrane) and the movement of folding-compensation floating roof disk.Program structure letter
It is single, good seal performance of less demanding to storage tank cylinder ovality.
Detailed description of the invention
Fig. 1 is the internal floating roof tank schematic diagram (vertical section) using apparatus of the present invention.
Fig. 2 be in Fig. 1 A-A to schematic cross-section.
In figure: 1- tank skin；2- floating plate；3- flexible cylinder；4- liquid phase assist medium；5- supports annulus；6- separates cylinder；7-
Inner sleeve；8- outer tube；9- circular ring shape supporting walls；The first pressing plate of 10-；The second pressing plate of 11-.
Specific embodiment
For a better understanding of the present invention, technical solution of the present invention is done further below with reference to embodiment and attached drawing
Explanation.
A kind of sealing device of floating roof tank, is mounted in floating roof tank, for sealing tank skin 1 and floating plate 2.
Including a flexible cylinder 3, the flexible cylinder 3 is that slightly the cylinder cartridge type of taper, diameter are big made of rubber membrane
One end and tank skin 1 be tightly connected by the first pressing plate 10, it is close that the small one end of diameter and 2 upper surface of floating plate pass through the second pressing plate 11
Envelope connection.The material of the flexible cylinder 3 is composite material, and when storage medium is petroleum-type product, internal layer uses nitrile rubber,
Outer layer uses neoprene, and two layers of adhesive plaster has nylon cord；It, can be when storage medium is all corrosive to both rubber
Add one layer of polytetrafluoroethylene film on the basis of the former nitrile rubber again.The performance of rubber membrane meets HG/T4074-2008 " gas-holder
With rubber sealing film ".
The upper end fixed seal connection of the flexible cylinder 3 is in the upper end of floating roof tank tank skin 1, and flexible cylinder 3 is close to tank skin 1
It naturally droops, the lower end of the flexible cylinder 3 flips up inwardly and is sealedly and fixedly connected in 2 top edge of floating plate of floating roof tank.
3 lower end of flexible cylinder, which flips up, will form a sandwiched area between tank skin 1 and floating plate 2, flexible
3 lower end of cylinder flips up in the sandwiched area to be formed full of liquid phase assist medium 4；The density etc. of the liquid phase assist medium 4
In the density of the liquid phase medium in floating roof tank；The liquid level of liquid phase assist medium 4 is higher than 2 upper surface of floating plate in the sandwiched area；
2 upper surface of floating plate is equipped with one and separates cylinder 6, for stopping liquid phase assist medium 4.
The length of flexible cylinder 3 to remain to form sandwiched area even if when floating plate 2 is in extreme lower position.Liquid phase
The effect of assist medium 4 is the sandwiched area for maintaining flexible cylinder 3, so that flexible cylinder 3 is easy to be flipped up and drops down.
The edge of 2 lower surface of floating plate is equipped with circular ring shape supporting walls 9, is used to support the flexible cylinder 3 flipped up
The bottom of the sandwiched area is equipped with support annulus 5, main for strutting the inside and outside flexible cylinder 3 of sandwiched area
Acting on is to maintain sandwiched area, be in extreme lower position in floating plate 2 or when close to extreme lower position, also functions to limitation floating plate 2 partially
The effect that the heart is swung.As a kind of selection, the support annulus 5 is flexible annular airbag structure, internal hydraulically full, whole close
Degree is greater than the density of liquid phase assist medium 4, and the outer diameter of the flexible annular airbag structure is equal to 1 internal diameter of tank skin and subtracts 2 times of flexibilities
The thickness of cylinder 3, internal diameter, which is equal to, states the thickness that 2 outer diameter of floating plate adds 2 times of flexible cylinders 3.Alternatively, annulus is supported
5 can also select larger-diameter seamless steel pipe to flatten, and butt weld must polish polishing, then be horizontally arranged, in highest
Place opens up the relieving device of a φ 10, then opens a M20 threaded hole, injects auxiliary liquid phase into ring by the threaded hole of M20 and is situated between
Matter has liquid phase medium outflow at 10 hole φ.Soldering and sealing threaded hole and relieving device, and weld seam is polished polishing.
The deflection of floating plate 2 in order to prevent is equipped between the floating plate 2 and floating roof tank for preventing leading for the rotation of floating plate 2
To device.The guiding device is the coaxial sleeve of one group of rectangular section, and the coaxial sleeve includes the inside and outside inner sleeve 7 arranged
With outer tube 8, the outer tube 8 is fixedly mounted on the center of floating roof tank abhiseca or fills the center at bottom, the inner sleeve 7 with it is floating
The connection of 2 center of disk, the length of coaxial sleeve are pulled out or are retracted with the height change of floating plate 2.Coaxial sleeve is mounted on storage
On tank bottom, tank deck can remove.
Embodiment one
When tank skin 1 interior diameter be D, be highly H, bearing beam height be h when, each key parameter of above-mentioned technical proposal is pressed
Formula is stated to determine.
The diameter D0=D- (100~200) of floating plate 2；
3 outside diameter D1=D- (10~50) of flexible cylinder；
3 end diameter D2=D0 of flexible cylinder；
Flexible cylinder 3 length H1=H- (100~500)-h+1.57 × (D1-D2)+200；
3 thickness δ=3 of flexible cylinder；
Liquid phase assist medium 4 volume V=0.393 × (H1-100) × [(D1-6)2-(D2-6)2]；
Separate the overall diameter D3=D- (300~600) of cylinder 6；
Separate height H3=1.02 × V/ [(D1-6) of cylinder 62-D32)]+50；
Support 5 center diameter of a circle D4=0.5 × (D+D2) of annulus；
Support 5 cross-sectional width L=(50~100) -10 of annulus；
Support 5 depth of section H=50~100 of annulus；
Support 5 section thickness δ=2.5~4.5 of annulus；
Liquid phase assist medium 4 can pay the utmost attention to tap water, as being in zero degree in the low ambient temperature longer term of storage tank location
Hereinafter, the conduction oil of low volatility then can be selected.The density of liquid phase assist medium 4 and the density contrast of storage medium are the smaller the better.
The section of guide sleeve is rectangle, can limit the rotation of floating plate 2 well.Between having between inner sleeve 7 and outer tube 8
Gap, in 8 slide inside of outer tube, the flanged plate by 8 lower end of blind plate and outer tube of 7 upper end of inner sleeve positions inner sleeve 7, therefore
Blind plate and flange plate thickness should not be too small, can use 20mm-50mm.7 blind plate of inner sleeve and the peripheral clearance in 8 section of outer tube are
2mm, the peripheral clearance of inner sleeve 7 and 8 flange plate hole of outer tube also 2mm.Inner sleeve 7 and 8 material of outer tube are Q235 steel plate, are quenched
Fire processing, inner surface reach mirror surface roughness by grinding, and four blocks of plates connect into four-prism with screw.Blind plate periphery
It also needs to reach mirror surface roughness by grinding with flanged plate hole surface.
Diameter 12m storage tank below can use floating roof disk guiding device in center shown in FIG. 1；The storage tank of major diameter is then
2 guiding device of floating plate of two or three casings is set, and the inside and outside tube section of casing is circle at this time.Two casings are with floating plate 2
It is arranged symmetrically centered on center；Three are then evenly distributed on some circumference of floating plate 2.
Embodiment two
A kind of rubber membrane dry gas-holder, the sealing device including the floating roof tank in embodiment one are dry for seal rubber film
Floating plate 2 in embodiment one need to only be become the ball of rubber membrane dry gas-holder instead of its rubber membrane by formula gas holder tank body and piston plate
Face piston plate, liquid phase medium become gas phase media.
Described above is only Application Example of the invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore according to equivalence changes made by scope of the present invention patent, still belongs to protection scope of the present invention.
Claims (10)
1. a kind of sealing device of floating roof tank, it is characterised in that: including a flexible cylinder (3), the upper end of the flexible cylinder (3)
Fixed seal connection flips up inwardly in the upper end of floating roof tank tank skin (1), the lower end of the flexible cylinder (3) and seals fixation
It is connected on the floating plate (2) of floating roof tank, flexible cylinder (3) lower end flips up in the sandwiched area to be formed to be situated between full of liquid phase auxiliary
Matter (4).
2. the sealing device of floating roof tank according to claim 1, it is characterised in that: the lower end of the flexible cylinder (3) with
Floating plate (2) top edge is tightly connected.
3. the sealing device of floating roof tank according to claim 2, it is characterised in that: the edge of floating plate (2) lower surface
Equipped with circular ring shape supporting walls (9), it is used to support the flexible cylinder (3) flipped up.
4. the sealing device of floating roof tank according to claim 1, it is characterised in that: the liquid phase assist medium (4) it is close
Degree is equal to the density of the liquid phase medium in floating roof tank.
5. the sealing device of floating roof tank according to claim 1, it is characterised in that: liquid phase auxiliary is situated between in the sandwiched area
The liquid level of matter (4) is higher than floating plate (2) upper surface；Floating plate (2) upper surface is equipped with one and separates cylinder (6), for stopping liquid phase
Assist medium (4).
6. the sealing device of floating roof tank according to claim 1, it is characterised in that: the bottom of the sandwiched area is equipped with branch
Ring (5) are held round, for strutting the inside and outside flexible cylinder (3) of sandwiched area；The outer diameter of support annulus (5) is equal to tank skin
(1) internal diameter subtracts the thickness of 2 times of flexible cylinders (3), and the internal diameter of support annulus (5) is equal to floating plate (2) outer diameter plus 2 times of flexible circles
The thickness of cylinder (3).
7. the sealing device of floating roof tank according to claim 6, it is characterised in that: the support annulus (5) is flexible ring
Shape airbag structure, internal hydraulically full, global density is greater than the density of liquid phase assist medium (4).
8. the sealing device of floating roof tank according to claim 1, it is characterised in that: between the floating plate (2) and floating roof tank
Equipped with the guiding device for preventing floating plate (2) from rotating.
9. the sealing device of floating roof tank according to claim 9, it is characterised in that: the guiding device is that one group of rectangle is cut
The coaxial sleeve in face, the coaxial sleeve include the inside and outside inner sleeve (7) and outer tube (8) arranged, the outer tube (8) is fixed
It is mounted on the center of floating roof tank abhiseca or fills the center at bottom, the inner sleeve (7) connect with floating plate (2) center.
10. a kind of rubber membrane dry gas-holder, it is characterised in that: the sealing dress including any floating roof tank of claim 1 to 9
It sets, is used for seal rubber film dry gas-holder tank body and piston plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910912352.7A CN110466899A (en) | 2019-09-25 | 2019-09-25 | The sealing device of floating roof tank and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910912352.7A CN110466899A (en) | 2019-09-25 | 2019-09-25 | The sealing device of floating roof tank and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110466899A true CN110466899A (en) | 2019-11-19 |
Family
ID=68516866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910912352.7A Pending CN110466899A (en) | 2019-09-25 | 2019-09-25 | The sealing device of floating roof tank and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110466899A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112550959A (en) * | 2020-12-16 | 2021-03-26 | 浙江海洋大学 | Internal floating roof oil tank sealing device of oil tanker |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0177399A1 (en) * | 1984-09-27 | 1986-04-09 | Electricite De France | Liquid tank with a floating roof, such as a storage tank used in the electronuclear field |
| JPH0518494A (en) * | 1991-07-10 | 1993-01-26 | Ishii Iron Works Co Ltd | Dry type gas holder |
| JPH0585592A (en) * | 1991-09-19 | 1993-04-06 | Mitsui Constr Co Ltd | Membrane type liquid storage tank |
| CN2442081Y (en) * | 2000-09-14 | 2001-08-08 | 崔金声 | Flexible sealed dry air cabinet |
| JP2008232345A (en) * | 2007-03-22 | 2008-10-02 | Nippon Steel Corp | Gas holder |
| CN204297427U (en) * | 2014-12-17 | 2015-04-29 | 沈科 | For floating roof and the tank arrangement of storage tank |
| CN206265662U (en) * | 2016-12-13 | 2017-06-20 | 中国海洋石油总公司 | Internal floating roof tank |
| CN107226296A (en) * | 2017-04-27 | 2017-10-03 | 北斗启明（北京）节能科技服务有限公司 | A kind of assembly type steel connects floating plate in liquid entirely |
| CN208699594U (en) * | 2018-07-24 | 2019-04-05 | 湖南思创节能技术有限公司 | A kind of interior floating plate anti-rotation device and interior floating plate |
| CN211109057U (en) * | 2019-09-25 | 2020-07-28 | 武汉工程大学 | Sealing device of floating roof tank and rubber film dry-type gas holder |
-
2019
- 2019-09-25 CN CN201910912352.7A patent/CN110466899A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0177399A1 (en) * | 1984-09-27 | 1986-04-09 | Electricite De France | Liquid tank with a floating roof, such as a storage tank used in the electronuclear field |
| JPH0518494A (en) * | 1991-07-10 | 1993-01-26 | Ishii Iron Works Co Ltd | Dry type gas holder |
| JPH0585592A (en) * | 1991-09-19 | 1993-04-06 | Mitsui Constr Co Ltd | Membrane type liquid storage tank |
| CN2442081Y (en) * | 2000-09-14 | 2001-08-08 | 崔金声 | Flexible sealed dry air cabinet |
| JP2008232345A (en) * | 2007-03-22 | 2008-10-02 | Nippon Steel Corp | Gas holder |
| CN204297427U (en) * | 2014-12-17 | 2015-04-29 | 沈科 | For floating roof and the tank arrangement of storage tank |
| CN206265662U (en) * | 2016-12-13 | 2017-06-20 | 中国海洋石油总公司 | Internal floating roof tank |
| CN107226296A (en) * | 2017-04-27 | 2017-10-03 | 北斗启明（北京）节能科技服务有限公司 | A kind of assembly type steel connects floating plate in liquid entirely |
| CN208699594U (en) * | 2018-07-24 | 2019-04-05 | 湖南思创节能技术有限公司 | A kind of interior floating plate anti-rotation device and interior floating plate |
| CN211109057U (en) * | 2019-09-25 | 2020-07-28 | 武汉工程大学 | Sealing device of floating roof tank and rubber film dry-type gas holder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112550959A (en) * | 2020-12-16 | 2021-03-26 | 浙江海洋大学 | Internal floating roof oil tank sealing device of oil tanker |
| CN112550959B (en) * | 2020-12-16 | 2022-07-08 | 浙江海洋大学 | Internal floating roof oil tank sealing device of oil tanker |
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