CN102941988A - 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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- CN102941988A CN102941988A CN2012104316945A CN201210431694A CN102941988A CN 102941988 A CN102941988 A CN 102941988A CN 2012104316945 A CN2012104316945 A CN 2012104316945A CN 201210431694 A CN201210431694 A CN 201210431694A CN 102941988 A CN102941988 A CN 102941988A
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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 the internal floating roof tank, particularly a kind of sealing arrangement for having self-cleaning function in the internal floating roof tank.
Background technology
Current, Petrochemical Enterprises clean cargo storage tank adopts internal floating roof tank mostly, in recent years, domestic a lot of internal floating roof tank blast accidents that cause because of the ferrous sulphide spontaneous combustion have occured, its immediate cause is to have a large amount of combustible gases in the tank, run into the quick-fried or burning of sudden strain of a muscle occurs after the ferrous sulphide spontaneous combustion in the tank, 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 the tank skin.
When storage tank is paid oil, floating plate moves downward, be to keep equilibrium of pressure, the tank outer air enters in the tank from tank deck, mixes with combustible gas in the tank, formation is in the combustible gas in the Explosive Range, simultaneously, provide sufficient new fresh oxygen to the ferrous sulphide erosion that is on tank skin and the floating plate, accelerated oxidizing reaction, discharge large calorimetric union and gather in erosion, after the arrival uniform temperature spontaneous combustion occurs namely.
For eliminating this potential safety hazard, must greatly reduce combustible gas content in the tank, simultaneously, eliminate the ferrous sulphide pyrophorus that gathers on tank skin and the floating plate.
From present circumstances, the main source of combustible gas is the very poor seal ring of sealing effectiveness in the tank, and other a small amount of oil gas come the annex on slit, floating plate and the floating plate of guidepost and floating plate.Current, the seal ring of internal floating roof tank generally adopts the ligulate sealing, and only a rubber plate is attached to tank skin, because often there is the slit in the horizontal displacement of floating plate between sealing and the tank skin, in addition, along with the prolongation of time of run, rubber plate elasticity reduces, and is difficult to guarantee to fit tightly with tank skin.Therefore, the sealing effectiveness of raising seal ring is the key that reduces hydrocarbon content in the tank.
The ferrous sulphide pyrophorus mainly comes in tank skin in the tank, and especially the tank skin part of middle and upper part is a small amount of next in tank deck.Because the floating plate lifting is frequent, the tank skin of middle and upper part is in the state that oil gas frequently switches mutually, aggravated the formation of erosion, and clean cargo have certain corrosive property mostly, the tank skin corrosion is difficult to avoid, therefore, in time remove the basic place that the erosion of adhering on the tank skin avoids it to gather being eliminating the 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 in time remove the corrosion product that tank skin adheres to again, 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 fixedly ring flat-plate 6, multi-disc rubber flap 10 and a wavy metal shape scraper plate 5.Described rubber flap 10 has certain elasticity, and multi-disc rubber flap 10 axially is installed in the fixedly periphery of ring flat-plate 6 along fixing ring flat-plate 6.Described wavy metal shape scraper plate 9 is installed in the bending part of a metallic support rod 8, described metallic support rod 8 is "＜" shape, end is installed in the below of multi-disc rubber flap 10 on it, lower end is equipped with counter weight 7, the effect of counter weight is to guarantee that metal corrugated scraper plate 9 is attached on the tank skin closely, with the function that realizes scraping impurity removing.
A plurality of described sealing arrangements evenly are installed on the whole circumference of floating plate 3.
The spacing of adjacent metal strut bar 8 can not greater than 1.5m, be preferably 1.0m.
The quantity of described rubber flap 10 determines according to the floating plate height, is preferably the 8-10 sheet.
The invention still further relates to the application of described sealing arrangement in internal floating roof tank.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the sealing arrangement scheme drawing of floating plate when up;
Fig. 3 is the sealing arrangement scheme drawing 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.
The specific embodiment
Sealing arrangement disclosed in this invention has self-cleaning function, is used for the floating plate of internal floating roof tank.Described sealing arrangement comprises fixedly ring flat-plate 6, multi-disc rubber flap 10 and a wavy metal shape scraper plate 5.Described rubber flap 10 has certain elasticity, and multi-disc rubber flap 10 axially is installed in the fixedly periphery of ring flat-plate 6 along fixing ring flat-plate 6.Described wavy metal shape scraper plate 9 is installed in the bending part of a metallic support rod 8, described metallic support rod 8 is "＜" shape, end is installed in the below of multi-disc rubber flap 10 on it, lower end is equipped with counter weight 7, the effect of counter weight is to guarantee that metal corrugated scraper plate 9 is attached on the tank skin closely, with the function that realizes scraping impurity removing.Multi-disc rubber flap 10 is connected with wavy metal shape scraper plate all and is connected with fixing ring flat-plate 6 by bolt, and fixedly the upper and lower side of ring flat-plate 6 is respectively equipped with bolt hole.
Described sealing arrangement both can have been realized the effective sealing to the floating plate edge, can remove at any time corrosion and other attachments on the tank skin with the up-and-down movement of floating plate again, to guarantee the cleaning of tank skin.
Described sealing arrangement is installed between floating plate 3 and the internal floating roof tank tank skin 1, is separately fixed at the edge of floating plate 3 by the fixing bolt of ring flat-plate 6 upper and lower sides.When floating plate 3 was up, rubber flap 10 was under self elastomeric adjusting, towards the below, as shown in Figure 2.When floating plate 3 was descending, rubber flap 10 was under self elastomeric adjusting, towards the top, as shown in Figure 3.During floating plate 3 operation, 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 large attachment of viscosity 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 the storage tank, and few part is mixed between the multi-disc rubber flap, with the frequent up-downgoing of floating plate, can under the effect of self gravitation, drop down onto gradually in the storage tank, thoroughly avoided 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, the oil gas that prevents floating plate 3 belows passes the upper space that seal ring enters floating plate 3, because multi-disc rubber flap 10 is multi-layer sealed, its sealing effectiveness is much better than present individual layer sealing.
Take the internal floating roof tank of 5000 cubic meters as example, floating plate diameter 24.8m, the tank skin inside diameter is 25m, and then the inboard girth of tank skin is 78.5m, and the floating plate girth is 77.9m.Because the maximum clearance of floating plate and tank skin is about 300mm, so the length of rubber flap is preferably 420-450mm, to guarantee that rubber flap fills up this gap fully.For guaranteeing the reliability of metal corrugated plate, the spacing of adjacent metal strut bar can not greater than 1.5m, generally be advisable with 1.0m.The quantity of the every rubber flap 10 of fixedly installing on the ring flat-plate 6 determines that according to the floating plate height general 8-10 sheet is advisable, and too much such as quantity, then resistance is excessive, can affect the normal operation of floating plate.
Claims (7)
1. the 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 (5),
Described rubber flap (10) has certain elasticity, and multi-disc rubber flap (10) axially is installed in the fixedly periphery of ring flat-plate (6) along fixing ring flat-plate (6);
Described wavy metal shape scraper plate (9) is installed in the bending part of a metallic support rod (8), and described metallic support rod (8) is "＜" shape, and end is installed in the below of multi-disc rubber flap (10) on it, and lower end is equipped with counter weight (7),
Multi-disc rubber flap (10) is connected 9 with wavy metal shape scraper plate) all be connected with fixing ring flat-plate (6) by bolt, fixedly the upper and lower side of ring flat-plate (6) is respectively equipped with bolt hole,
Described sealing arrangement is installed between floating plate (3) and the internal floating roof tank tank skin (1), be separately fixed at the edge of floating plate (3) by the fixing bolt of 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, a plurality of described sealing arrangements evenly are installed 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 the floating plate height.
6. sealing arrangement as claimed in claim 5 is characterized in that, the quantity of described rubber flap (10) is preferably the 8-10 sheet.
7. the application of sealing arrangement in internal floating roof tank as described in arbitrary such as 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 true CN102941988A (en) | 2013-02-27 |
| CN102941988B 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110723425A (en) * | 2018-07-17 | 2020-01-24 | 广东世华设备技术有限公司 | 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110723425A (en) * | 2018-07-17 | 2020-01-24 | 广东世华设备技术有限公司 | Aluminum profile floating plate |
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| Publication number | Publication date |
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| CN102941988B (en) | 2014-08-20 |
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