DK171541B1 - Emergency discharge device for storage or cargo tanks by means of which a connection can be established to one or more ballast tanks - Google Patents
Emergency discharge device for storage or cargo tanks by means of which a connection can be established to one or more ballast tanks Download PDFInfo
- Publication number
- DK171541B1 DK171541B1 DK82292A DK82292A DK171541B1 DK 171541 B1 DK171541 B1 DK 171541B1 DK 82292 A DK82292 A DK 82292A DK 82292 A DK82292 A DK 82292A DK 171541 B1 DK171541 B1 DK 171541B1
- Authority
- DK
- Denmark
- Prior art keywords
- tanks
- ballast
- tank
- cargo
- burst plate
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/082—Arrangements for minimizing pollution by accidents
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Public Health (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Ocean & Marine Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Safety Valves (AREA)
- Pipeline Systems (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
DK 171541 B1DK 171541 B1
Opfindelsen angår en nødtømningsindretning til tilvejebringelse af en forbindelse mellem en lasttank og en ballasttank i et skib under anvendelse af et fjernbetjeneligt afspærringsorgan i en forbindelsesledning mellem tankene.The invention relates to an emergency discharge device for providing a connection between a cargo tank and a ballast tank in a ship using a remote controlled shut-off member in a connecting line between the tanks.
5 Mellem de lasttanke i et skib, der udelukkende skal fyldes med olie eller eventuelt flydende kemikalier, og de kun ballastvand optagende ballasttanke må der normalt ingen rørledningsforbindelser findes. Bliver imidlertid en fyldt lasttank beskadiget, så foreligger den risiko, at dennes 10 hele indhold strømmer ud i det skibet omgivende vand. Da en fuldt eller delvis lastet tankbåd sædvanligvis har tomme ballasttanke, foreslås det inden for rammerne for opfindelsen i nødstilfælde at lede olie fra beskadigede last- eller forrådstanke til tomme ballasttanke.5 Between the cargo tanks of a ship to be filled exclusively with oil or any liquid chemicals, and the only ballast water absorbing ballast tanks, no pipeline connections should normally be found. However, if a filled cargo tank is damaged, there is a risk that its entire contents will flow into the surrounding water of the ship. Since a fully or partially loaded tanker usually has empty ballast tanks, it is proposed within the scope of the invention to emergency oil from damaged cargo or storage tanks to empty ballast tanks.
15 I EP patentskrift nr. 432 819 er det allerede fore slået mellem lasttanke og ballasttanke at tilvejebringe forbindelsesledninger med hver to afspærringsventiler, som på grund af en alarm fra en fyldestandsføler skal åbnes ved fjernbetjening. Der foreligger imidlertid ingen sikkerhed 20 mod en overstrømning af væsken ved utætte ventiler eller disses fejlbetjening.15 In EP Patent No. 432,819, it is already proposed between load tanks and ballast tanks to provide connecting lines with every two shut-off valves, which, due to an alarm from a filling level sensor, must be opened by remote control. However, there is no security 20 against overflow of the liquid by leaking valves or their malfunction.
Opfindelsens formål er tilvejebringelse af en nødtømningsindretning til en forråds- eller lasttank, ved hjælp af hvilken en forbindelse mellem lasttanken og en ballasttank 25 i nødstilfælde kan etableres, og som ved siden af et afspærringsorgan har et yderligere lukkemiddel, som kun kan åbnes én gang, samt en kontrolmulighed for den tætnende funktion af afspærringsmidlet.The object of the invention is to provide an emergency discharge device for a storage or cargo tank by means of which a connection between the cargo tank and a ballast tank 25 can be established in an emergency, and which has, next to a locking means, an additional closing means which can only be opened once, as well as a control option for the sealing function of the blocking means.
Dette opnås ifølge opfindelsen ved en nødtømnings-30 indretning af den indledningsvis nævnte art med de i krav l's kendetegnende del angivne ejendommeligheder.This is achieved according to the invention by means of an emergency discharge device of the kind mentioned initially with the characteristics specified in claim 1.
Nødtømningsindretningen anbringes mellem rørledningsdele, der til den ene side er forbundet med en lasttank og til den anden side med en ballasttank, eller mellem rørled-35 ninger, som dels hører til et lastoliesystem og dels til et ballastvandsystem. Herved er det uden betydning, om via 2 DK 171541 B1 hver af de to sider af nødtømningsindretningen kun én eller flere tanke er forbundet med hinanden. I en foretrukken udførelsesform er til én lasttank knyttet flere ballasttanke.The emergency discharge device is placed between pipeline parts connected to one cargo tank on the one hand and to a ballast tank on the other, or between pipelines which belong partly to a cargo oil system and partly to a ballast water system. It is therefore irrelevant that, via 2 DK 171541 B1, each of the two sides of the emergency discharge device is connected to only one or more tanks. In a preferred embodiment, several ballast tanks are attached to one cargo tank.
Indretningen omfatter et fjernbetj eneligt afspærrings-5 organ, et sig dertil sluttende sikkerhedsrum og en dette i retning mod ballasttanken afspærrende sprængplade. Det rørformede sikkerhedsrum er fyldt med en sikkerheds væske, eksempelvis en hydraulikolie, og fra sikkerhedsrummet fører et kontroltrykrør opad til over hoveddækket til et skueglas 10 og/eller en buffertank, hvori fyldestanden af sikkerhedsvæs-ken kan overvåges. Stiger væsken i skueglasset, så foreligger der en lækage af afspærringsorganet, og der trænger lastolie ind i sikkerhedsrummet. Synker derimod væskespejlet i skueglasset, så tyder dette på en utæthed ved sprængpladen og 15 en udstrømning af sikkerhedsvæsken i ballasttanken. Kontrol-trykrøret kan endvidere via mindst ét særskilt fjernbetje-neligt afspærringsorgan være forbundet med et hyrauliksystem. Trykket i hydrauliksystemet er så stort, at efter åbning af afspærringsorganet er trykket i nødstilfælde tilstrækkeligt 20 til at ødelægge sprængpladen, så at olie ved åbnet afspærringsorgan kan strømme fra lasttanken til ballasttanken. Efter ødelæggelsen af sprængpladen lukkes afspærringsorganet til hydrauliksystemet. Hydraulikolien fra sikkerhedsrummet er ligeledes strømmet ind i ballasttanken. Da der i skue-25 glasset nu ikke længere kan aflæses nogen fyldestand, bliver der heraf klart, at sprængpladen forud er blevet ødelagt, og at ballasttanken derfor ikke længere må benyttes som sådan, uden at olien fjernes, og tanken renses. Den foran beskrevne visuelle kontrol ved hjælp af en i et skueglas 30 synlig fyldestand kan naturligvis også fortrinsvis yderligere ske ved hjælp af egnede måleindretninger, hvis måleværdier videregives til broen, for dér at vise den upåklageligt tætnende funktion af indretningen eller ødelæggelsen af sprængpladen efter et nødstilfælde.The device comprises a remote controlled locking means, a security room adjacent thereto and an explosive plate blocking the ballast tank. The tubular safety compartment is filled with a safety fluid, for example a hydraulic oil, and from the safety compartment a control pressure tube leads upwards over the main deck to a sight glass 10 and / or a buffer tank in which the filling level of the safety fluid can be monitored. If the liquid rises in the sight glass, there is a leakage of the locking means and cargo oil penetrates into the safety room. On the other hand, if the liquid level drops in the sight glass, this indicates a leak at the burst plate and an outflow of the safety fluid in the ballast tank. Furthermore, the control pressure tube can be connected to a hydraulic system via at least one separate remote controlled locking means. The pressure in the hydraulic system is so great that, after opening the shut-off means, the pressure in an emergency is sufficiently 20 to destroy the burst plate, so that when opened, the oil can flow from the load tank to the ballast tank. After destruction of the burst plate, the shut-off member is closed to the hydraulic system. The hydraulic oil from the safety room has also been poured into the ballast tank. Since no fill level can now be read in the sight-glass, it becomes clear from this that the burst plate has been destroyed beforehand and that the ballast tank must therefore no longer be used as such without removing the oil and the tank is cleaned. Of course, the visual control described above with the aid of a filler visible in a sight glass 30 may also preferably be further accomplished by means of suitable measuring devices, whose measurement values are passed to the bridge, to show there the impeccably sealing function of the device or the destruction of the burst plate after an emergency. .
35 Opfindelsen skal i det følgende beskrives nærmere, idet der henvises til tegningen, der forenklet viser en 3 DK 171541 B1 foretrukken udførelsesform.The invention will now be described in more detail with reference to the drawing which, in simplified form, shows a preferred embodiment.
I en ledning 1, der eksemplvis kommer fra en olie-lasttank, befinder sig et fjernbetjeneligt afspærringsorgan 3. Til dette slutter sig et med en sikkerhedsvæske 11, f.eks.In a conduit 1 which, for example, comes from an oil cargo tank, is a remote controlled shut-off member 3. To this end one joins a safety fluid 11, e.g.
5 hydraulikolie, fyldt sikkerhedsrum 5, der ved hjælp af en sprængplade 4 er lukket i forhold til en ledning 2, der fører til en ballasttank. Fra sikkerhedsrummet 5 fører et kontrol trykrør 6 til en kontrolindretning 7 i form af et skueglas og/eller en buffertank. Kontroltrykrøret 6 kan via 10 et fjernbetjeneligt afspærringsorgan 8 forbindes med et hydrauliksystem 9.5 hydraulic oil, filled safety compartment 5, which is closed by means of an explosive plate 4 in relation to a conduit 2 leading to a ballast tank. From the safety room 5, a control pressure tube 6 leads to a control device 7 in the form of a sight glass and / or a buffer tank. The control pressure tube 6 can be connected via a remote control locking means 8 to a hydraulic system 9.
Som sikkerhedsvæske foretrækkes hydraulikolie, som ombord står til rådighed i et hydrauliksystem. Sprængpladen 4 er dimensioneret således, at den ikke kan ødelægges på 15 grund af de optrædende statiske og dynamiske kræfter i sikkerhedsrummet 5 og trykrøret 6. Sprængpladen 4 er imidlertid afstemt således med trykket i hydrauliksystemet 9, at ved åbning af hydraulikafspærringsorganet 8 ødelægger en trykimpuls fra hydrauliksystemet 9 sprængpladen 4. Derefter må 20 hydraulikafspærringsorganet 8 lukkes igen, og det fjern-betjenelige afspærringsorgan 3 for olien åbnes.Hydraulic oil, which is available on board in a hydraulic system, is preferred as a safety fluid. The burst plate 4 is sized so that it cannot be destroyed due to the static and dynamic forces occurring in the safety compartment 5 and the pressure pipe 6. However, the burst plate 4 is aligned with the pressure in the hydraulic system 9, that upon opening the hydraulic shut-off member 8, a pressure pulse of the hydraulic system 9 burst plate 4. Then, the hydraulic shut-off member 8 must be closed again and the remote-controlled shut-off member 3 for the oil is opened.
Ved anbringelse af nødtømningsindretningen i en egnet højde neden under hoveddækket 10 og med store diametre af ledningerne 1 og 2 kan forholdsvis hurtigt i det mindste en 25 del af olien strømme fra en beskadiget lasttank til en tom lasttank.By placing the emergency discharge device at a suitable height below the main deck 10 and with large diameters of the conduits 1 and 2, relatively at least a portion of the oil can flow from a damaged cargo tank to an empty cargo tank relatively quickly.
Såfremt olien transporteres fra en beskadiget lasttank til en ballasttank ved hjælp af pumper, kan sprængpladen 4 være dimensioneret således i forhold til oliepumpernes pum-30 petryk ved åbnet afspærringsorgan 3, at pumpetrykket kan ødelægge sprængpladen 4. Også i dette tilfælde er ødelæggelsen af sprængpladen 4 erkendelig i skueglasset 7. For at undgå fejlbetjeninger, ved hvilke sprængpladen 4 utilsigtet ødelægges, er imidlertid yderligere sikkerhedsforanstaltnin-35 ger hensigtsmæssige, som forhindrer, at olie af vanvare pumpes i ballasttanken eller -tankene.If the oil is transported from a damaged cargo tank to a ballast tank by means of pumps, the burst plate 4 may be dimensioned in relation to the pumping pressure of the oil pumps at open shut-off means 3 so that the pump pressure can destroy the burst plate 4. Also in this case, the destruction of the burst plate 4 recognizable in the sight glass 7. However, in order to avoid malfunctions in which the burst plate 4 is inadvertently destroyed, additional safety measures are appropriate which prevent the oil from being pumped into the ballast tank or tanks.
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914121175 DE4121175C1 (en) | 1991-06-22 | 1991-06-22 | |
DE4121175 | 1991-06-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
DK82292D0 DK82292D0 (en) | 1992-06-22 |
DK82292A DK82292A (en) | 1992-12-23 |
DK171541B1 true DK171541B1 (en) | 1996-12-30 |
Family
ID=6434826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK82292A DK171541B1 (en) | 1991-06-22 | 1992-06-22 | Emergency discharge device for storage or cargo tanks by means of which a connection can be established to one or more ballast tanks |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE4121175C1 (en) |
DK (1) | DK171541B1 (en) |
GB (1) | GB2257396B (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1106135B (en) * | 1959-09-05 | 1961-05-04 | Bbc Brown Boveri & Cie | Safety valve arrangement for a contaminated gas in nuclear reactor plants |
US4964437A (en) * | 1989-12-15 | 1990-10-23 | Energy Transportation Group, Inc. | Apparatus and method for control of oil leakage from damaged tanker |
-
1991
- 1991-06-22 DE DE19914121175 patent/DE4121175C1/de not_active Expired - Fee Related
-
1992
- 1992-06-16 GB GB9212774A patent/GB2257396B/en not_active Expired - Fee Related
- 1992-06-22 DK DK82292A patent/DK171541B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB2257396B (en) | 1995-03-01 |
DK82292D0 (en) | 1992-06-22 |
GB9212774D0 (en) | 1992-07-29 |
DE4121175C1 (en) | 1992-11-05 |
GB2257396A (en) | 1993-01-13 |
DK82292A (en) | 1992-12-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B1 | Patent granted (law 1993) | ||
PBP | Patent lapsed |