CN102941988B - Sealing device with self-cleaning function used in internal floating roof storage tank - Google Patents
Sealing device with self-cleaning function used in internal floating roof storage tank Download PDFInfo
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- CN102941988B CN102941988B CN201210431694.5A CN201210431694A CN102941988B CN 102941988 B CN102941988 B CN 102941988B CN 201210431694 A CN201210431694 A CN 201210431694A CN 102941988 B CN102941988 B CN 102941988B
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Abstract
The invention relates to a compound sealing device applied to an internal floating roof storage tank. The compound sealing device can greatly improve the sealing effect and timely clear corrosion products attached to the tank wall, thereby greatly reducing the risk that blast accidents initiated by spontaneous combustion of the corrosion products occur in the tank. The compound sealing device comprises a fixed annular plate 6, a plurality of rubber scraping plates 10 and metal corrugated plates 5, wherein the rubber scraping plates 10 are mounted on the periphery of the fixed annular plate 6 in the axial direction of the fixed annular plate 6; a metal corrugated plate 9 is mounted at a bent part of a metal supporting bar 8; and the upper tail end of the metal supporting bar 8 is mounted below the plurality of rubber scraping plates 10. A plurality of sealing devices are evenly mounted on the whole circumference of a floating disc 3.
Description
Technical field
The present invention relates to a kind of for the sealing arrangement in internal floating roof tank, particularly a kind of for thering is the sealing arrangement of self-cleaning function in internal floating roof tank.
Background technology
Current, Petrochemical Enterprises clean cargo storage tank adopts internal floating roof tank mostly, in recent years, domestic occurred a lot of because of ferrous sulphide spontaneous combustion cause internal floating roof tank blast accidents, its immediate cause is in tank, to have a large amount of combustible gases, run in tank and after ferrous sulphide spontaneous combustion, occur to dodge quick-fried or burning, basic reason is that the floating plate sealing arrangement sealing effectiveness of internal floating roof tank is poor, gathers the ferrous sulphide erosion of a large amount of distributions in heaps on floating plate or tank skin.
In the time that storage tank is paid oil, floating plate moves downward, for keeping equilibrium of pressure, tank outer air enters in tank from tank deck, mixes with the combustible gas in tank, form the combustible gas in Explosive Range, meanwhile, provide sufficient new fresh oxygen to the ferrous sulphide erosion on tank skin and floating plate, accelerated oxidizing reaction, discharge large calorimetric union and gather in erosion, after arrival uniform temperature, spontaneous combustion occurs.
For eliminating this potential safety hazard, must greatly reduce combustible gas content in tank, meanwhile, eliminate the ferrous sulphide pyrophorus gathering on tank skin and floating plate.
From present circumstances, in tank, the main source of combustible gas is the very poor seal ring of sealing effectiveness, and other a small amount of oil gas carry out the annex on gap, floating plate and the floating plate of guidepost and floating plate.Current, the seal ring of internal floating roof tank generally adopts ligulate sealing, and only a rubber plate is attached to tank skin, due to the horizontal displacement of floating plate, between sealing and tank skin, often there is gap, in addition, along with the prolongation of time of run, rubber plate elasticity reduces, and is difficult to ensure to fit tightly with tank skin.Therefore, the sealing effectiveness of raising seal ring is the key that reduces hydrocarbon content in tank.
In tank, ferrous sulphide pyrophorus mainly comes in tank skin, and the especially tank skin part of middle and upper part is a small amount of next in tank deck.Because floating plate lifting is frequent, the tank skin of middle and upper part is in oil gas switches mutually frequently state, aggravate the formation of erosion, and clean cargo have certain corrosive property mostly, corrosion occurs tank skin is difficult to avoid, the basic place of therefore, removing in time the erosion of adhering on tank skin and avoid it to gather being eliminating erosion spontaneous combustion.
Summary of the invention
The invention provides a kind of compound sealing device that is applied to internal floating roof tank, can greatly improve sealing effectiveness, can remove in time again the corrosion product that tank skin adheres to, thereby greatly reduce the risk of the blast accident of tank Nei Fashengyin corrosion product spontaneous combustion initiation.
The invention provides a kind of sealing arrangement with self-cleaning function, comprise fixing ring flat-plate 6, multi-disc rubber flap 10 and a wavy metal shape scraper plate 9.Described rubber flap 10 has certain elasticity, and multi-disc rubber flap 10 is along the periphery that is axially arranged on fixing ring flat-plate 6 of fixing ring flat-plate 6.Described wavy metal shape scraper plate 9 is arranged on the bending part of a metallic support rod 8, described metallic support rod 8 is " < " shape, on it, end is arranged on the below of multi-disc rubber flap 10, lower end is provided with counter weight 7, the effect of counter weight is to ensure that metal corrugated scraper plate 9 is attached on tank skin closely, to realize the function of scraping impurity removing.
Multi-disc rubber flap 10 is all connected with fixing ring flat-plate 6 by bolt with wavy metal shape scraper plate 9, and the upper and lower side of fixing ring flat-plate 6 is respectively equipped with bolt hole.Described sealing arrangement is arranged between floating plate 3 and storage tank shell 1, is separately fixed at the edge of floating plate 3 by the bolt of fixing ring flat-plate 6 upper and lower sides, and the free end of described rubber flap 10 and described wavy metal shape scraper plate 9 all keep close contact with tank skin 1.
Multiple described sealing arrangements are evenly arranged on the whole circumference of floating plate 3.
The spacing of adjacent metal strut bar 8 can not be greater than 1.5m, is preferably 1.0m.
The quantity of described rubber flap 10 determines according to floating plate height, is preferably 8-10 sheet.
The invention still further relates to the application of described sealing arrangement in internal floating roof tank.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the sealing arrangement schematic diagram of floating plate when up;
Fig. 3 is the sealing arrangement schematic diagram of floating plate when descending, wherein,
1. storage tank shell; 2. sealing arrangement; 3. floating plate; 4. pasta; 5. bolt; 6. fixing ring flat-plate; 7. counter weight; 8. metallic support rod; 9. wavy metal shape scraper plate; 10. rubber flap.
Detailed description of the invention
Sealing arrangement disclosed in this invention, has self-cleaning function, for the floating plate of internal floating roof tank.Described sealing arrangement, comprises fixing ring flat-plate 6, multi-disc rubber flap 10 and a wavy metal shape scraper plate 9.Described rubber flap 10 has certain elasticity, and multi-disc rubber flap 10 is along the periphery that is axially arranged on fixing ring flat-plate 6 of fixing ring flat-plate 6.Described wavy metal shape scraper plate 9 is arranged on the bending part of a metallic support rod 8, described metallic support rod 8 is " < " shape, on it, end is arranged on the below of multi-disc rubber flap 10, lower end is provided with counter weight 7, the effect of counter weight is to ensure that metal corrugated scraper plate 9 is attached on tank skin closely, to realize the function of scraping impurity removing.Multi-disc rubber flap 10 is all connected with fixing ring flat-plate 6 by bolt with wavy metal shape scraper plate 9, and the upper and lower side of fixing ring flat-plate 6 is respectively equipped with bolt hole.
Described sealing arrangement both can have been realized the effective sealing to floating plate edge, can remove at any time corrosion and other attachments on tank skin with the up-and-down movement of floating plate again, to ensure the cleaning of tank skin.
Described sealing arrangement is arranged between floating plate 3 and internal floating roof tank tank skin 1, is separately fixed at the edge of floating plate 3 by the bolt of fixing ring flat-plate 6 upper and lower sides.In the time that floating plate 3 is up, rubber flap 10 under self elastomeric adjusting, downward, as shown in Figure 2.In the time that floating plate 3 is descending, rubber flap 10 under self elastomeric adjusting, upward, as shown in Figure 3.When floating plate 3 moves, rubber flap 10 and wavy metal shape scraper plate 9 play the effect of cleaning tank skin attachment simultaneously, wherein, wavy metal shape scraper plate 9 to hang intensity large, the attachment that viscosity is large is adhered in main responsible cleaning, and the dynamics that hangs of multi-disc rubber flap 10 is relatively soft, the main thoroughly attachment on cleaning tank skin surface of being responsible for.The attachment major part of disposing falls into oil in storage tank, and few part is mixed between multi-disc rubber flap, with the frequent up-downgoing of floating plate, can under the effect of self gravitation, drop down onto gradually in storage tank, thoroughly avoid the gather spontaneous combustion of ferrous sulphide on floating plate 3 tops.
And multi-disc rubber flap 10 keeps close contact with tank skin 1, also play the effect of sealing oil gas, prevent that the oil gas of floating plate 3 belows from entering the upper space of floating plate 3 through seal ring, because multi-disc rubber flap 10 is multi-layer sealed, its sealing effectiveness is much better than current individual layer sealing.
Taking the internal floating roof tank of 5000 cubic meters as example, floating plate diameter 24.8m, tank skin inside diameter is 25m, and inside tank skin, girth is 78.5m, and floating plate girth is 77.9m.Because the maximum clearance of floating plate and tank skin is about 300mm, therefore the length of rubber flap is preferably 420-450mm, to ensure that rubber flap fills up this gap completely.For ensureing the reliability of metal corrugated plate, the spacing of adjacent metal strut bar can not be greater than 1.5m, is generally advisable with 1.0m.The quantity of the rubber flap 10 of installing on every fixing ring flat-plate 6 is according to the decision of floating plate height, and general 8-10 sheet is advisable, and as too much in quantity, resistance is excessive, can affect the normal operation of floating plate.
Claims (7)
1. a sealing arrangement with self-cleaning function, is characterized in that, described sealing arrangement comprises a fixing ring flat-plate (6), multi-disc rubber flap (10) and wavy metal shape scraper plate (9),
Described rubber flap (10) has certain elasticity, and multi-disc rubber flap (10) is along the periphery that is axially arranged on fixing ring flat-plate (6) of fixing ring flat-plate (6);
Described wavy metal shape scraper plate (9) is arranged on the bending part of a metallic support rod (8), described metallic support rod (8) is " < " shape, on it, end is arranged on the below of multi-disc rubber flap (10), lower end is provided with counter weight (7)
Multi-disc rubber flap (10) is all connected with fixing ring flat-plate (6) by bolt with wavy metal shape scraper plate (9), and the upper and lower side of fixing ring flat-plate (6) is respectively equipped with bolt hole,
Described sealing arrangement is arranged between floating plate (3) and internal floating roof tank tank skin (1), be separately fixed at the edge of floating plate (3) by the bolt of fixing ring flat-plate (6) upper and lower side, the free end of described rubber flap (10) and described wavy metal shape scraper plate (9) all keep close contact with tank skin (1).
2. sealing arrangement as claimed in claim 1, is characterized in that, multiple described sealing arrangements are evenly arranged on the whole circumference of floating plate (3).
3. sealing arrangement as claimed in claim 1, is characterized in that, the spacing of adjacent metal strut bar (8) can not be greater than 1.5m.
4. sealing arrangement as claimed in claim 3, is characterized in that, the spacing of adjacent metal strut bar (8) is preferably 1.0m.
5. sealing arrangement as claimed in claim 1, is characterized in that, the quantity of described rubber flap (10) determines according to floating plate height.
6. sealing arrangement as claimed in claim 5, is characterized in that, the quantity of described rubber flap (10) is preferably 8-10 sheet.
7. the application of sealing arrangement in internal floating roof tank as described in as arbitrary in claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210431694.5A CN102941988B (en) | 2012-10-31 | 2012-10-31 | Sealing device with self-cleaning function used in internal floating roof storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210431694.5A CN102941988B (en) | 2012-10-31 | 2012-10-31 | Sealing device with self-cleaning function used in internal floating roof storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102941988A CN102941988A (en) | 2013-02-27 |
| CN102941988B true CN102941988B (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210431694.5A Active CN102941988B (en) | 2012-10-31 | 2012-10-31 | Sealing device with self-cleaning function used in internal floating roof storage tank |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110723425B (en) * | 2018-07-17 | 2022-02-08 | 中国石油化工股份有限公司 | Aluminum profile floating plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273250A (en) * | 1978-01-30 | 1981-06-16 | Kinghorn Sr Mark D | Sealing system for liquid storage tanks |
| CN2510436Y (en) * | 2001-09-27 | 2002-09-11 | 张凤球 | Combined outer floating plate for oil-storage tank |
| CN2803990Y (en) * | 2005-06-22 | 2006-08-09 | 贾钢 | Wax scraper of floating-roof oil tank |
| JP2008037434A (en) * | 2006-08-01 | 2008-02-21 | Japan Energy Corp | Floating roof tank and weather seal device for floating roof tank |
| TWM418899U (en) * | 2011-02-17 | 2011-12-21 | Ming-Cang Yu | Floating roof device for oil tank |
-
2012
- 2012-10-31 CN CN201210431694.5A patent/CN102941988B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273250A (en) * | 1978-01-30 | 1981-06-16 | Kinghorn Sr Mark D | Sealing system for liquid storage tanks |
| CN2510436Y (en) * | 2001-09-27 | 2002-09-11 | 张凤球 | Combined outer floating plate for oil-storage tank |
| CN2803990Y (en) * | 2005-06-22 | 2006-08-09 | 贾钢 | Wax scraper of floating-roof oil tank |
| JP2008037434A (en) * | 2006-08-01 | 2008-02-21 | Japan Energy Corp | Floating roof tank and weather seal device for floating roof tank |
| TWM418899U (en) * | 2011-02-17 | 2011-12-21 | Ming-Cang Yu | Floating roof device for oil tank |
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| Publication number | Publication date |
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| CN102941988A (en) | 2013-02-27 |
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