NO773895L - DAVIT. - Google Patents
DAVIT.Info
- Publication number
- NO773895L NO773895L NO773895A NO773895A NO773895L NO 773895 L NO773895 L NO 773895L NO 773895 A NO773895 A NO 773895A NO 773895 A NO773895 A NO 773895A NO 773895 L NO773895 L NO 773895L
- Authority
- NO
- Norway
- Prior art keywords
- davit
- specified
- gas
- jacks
- lifeboat
- Prior art date
Links
- 239000007789 gas Substances 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 230000005484 gravity Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000005303 weighing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002775 capsule Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B23/00—Equipment for handling lifeboats or the like
- B63B23/02—Davits, i.e. devices having arms for lowering boats by cables or the like
- B63B23/04—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type
- B63B23/06—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type with actual pivots
- B63B23/10—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type with actual pivots with positive drive of the arms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Catalysts (AREA)
- Emergency Lowering Means (AREA)
Description
"Davit" "David"
Foreliggende oppfinnelse angår en davit for en livbåt påThe present invention relates to a davit for a lifeboat on
en sjogående innretning, utstyrt med en eller flere bære-a sea-going device, equipped with one or more carrying
armer og méd en drivmekanisme som livbåten kan beveges ved hjelp av mellom innenbords og utenbords stilling. arms and with a drive mechanism by means of which the lifeboat can be moved between inboard and outboard positions.
Med livbåt menes i denne sammenheng vanlige livbåter, red-ningsflåter, redningskapsler og lignende, mens sjogående innretning kan utgjores av f.eks. et skip, en flytekran, en boreplatform og annet. In this context, lifeboat means ordinary lifeboats, life rafts, rescue capsules and the like, while seagoing equipment can be made of e.g. a ship, a floating crane, a drilling platform and more.
I henhold til internationale konvensjoner inndeles daviterAccording to international conventions, davits are divided
i to hovedgrupper:in two main groups:
1) Heisedaviter tillatt for livbåter som veier mindre enn 2.300 kp når de skal svinges ut. , 2) Tyngdekraftdaviter for livbåter som veier mer enn 2.300 kp 1) Hoist davits permitted for lifeboats weighing less than 2,300 kp when they are to be swung out. , 2) Gravity davits for lifeboats weighing more than 2,300 kp
når de skal svinges ut, samt tillatt for. livbåter som nevnt under punkt 1. when they are to be swung out, as well as permitted for. lifeboats as mentioned under point 1.
Vanligvis forstås folgende i klassifiseringsselskaper ogUsually the following is understood in classification societies and
innen skipsinspeksjon:within ship inspection:
1.1) Heisedaviter er daviter som brukes for å bringe en liv-1.1) Lifting davits are davits that are used to bring a life-
båt i utenbords stilling ved hjelp av menneskelig kraft.boat in outboard position using human power.
2.1) Tyngdekraftdaviter er daviter som brukes for å bringe en livbåt til utenbords stilling bare ved hjelp av tyngdekraft. 2.1) Gravity davits are davits that are used to bring a lifeboat to the outboard position using only gravity.
De betraktninger som har medfort inndelingen av daviter i de ovenfornevnte grupper: '; The considerations that have led to the division of davits into the above-mentioned groups: ';
a) Menneskeligkraft såvel som tyngdekraft er alltig disponibel J; når det er nodvendig å forlate et skip, og begge typer kraft a) Human power as well as gravity is always available J; when it is necessary to abandon a ship, and both types of power
er uavhengig av den sjogående innretning. ;! b) Heisedaviter og tyngdekraftdaviter var allerede vanlige i bruk, og ble ansett for å være-de for tiden beste losninger. sV is independent of the viewing device. ;! b) Lift davits and gravity davits were already common in use, and were considered to be the best solutions at the time. sV
Videre kan det fastslås at heisedaviter nesten alltid er utstyrt med mekaniske innretninger for å skru davitene inn og ut. Ved den senere tids utvikling av mekaniske daviter er tatt . i bruk hydrauliske sylindere med håndpumper i stedet for. skrue-, spindler. Furthermore, it can be established that hoist davits are almost always equipped with mechanical devices to screw the davits in and out. The recent development of mechanical davits has taken . in use hydraulic cylinders with hand pumps instead. screw, spindles.
Disse losninger har de ulemper at for storre livbåter må tyngdekraftdaviter være basert på glidning, det må finnes svingesysterner eller andre midler for å tillate bevegelse av livbåten fra innenbords til utenbords stilling ved hjelp av davitene, og å senke livbåten til vannoverflaten fra den utenbords stilling. These solutions have the disadvantages that for larger lifeboats gravity davits must be based on sliding, there must be swivel cisterns or other means to allow movement of the lifeboat from the inboard to outboard position using the davits, and to lower the lifeboat to the water surface from the outboard position.
Formålet med den foreliggende oppfinnelse er å komme fremThe purpose of the present invention is to arrive at
til en davit av en slik konstruksjon at den kan anvendes for livbåter som veier både mer og mindre, enn 2.300 kp, uten. an-, to a davit of such a construction that it can be used for lifeboats weighing both more and less than 2,300 kp, without. an-,
vendelse av av tyngdekraft eller menneskelig kraft.reversal of gravity or human power.
Dette oppnås i henhold til oppfinnelsen ved at drivmekanismenThis is achieved according to the invention by the drive mechanism
er tilkoblet sin egen kilde med konsentrert energi. Med denne energikilde er det mulig å manbvrere davitene uavhengig av energisystemet i den sjogående innretning, og uavhengig av storrelsen av den vekt livbåten har når den skal svinges ut, is connected to its own source of concentrated energy. With this energy source, it is possible to man the davits independently of the energy system in the seagoing device, and regardless of the size of the lifeboat's weight when it has to be swung out,
slik at livbåten kan beveges mellom innenbords og utenbords-so that the lifeboat can be moved between inboard and outboard
stilling selv om skipet eller en annen sjogående innretning har slagside. position, even if the ship or other sea-going device has a starboard side.
I henhold til en foretrukket utforelsesform av oppfinnelsenAccording to a preferred embodiment of the invention
omfatter kilden med konsentrert energi et antall tanker med komprimert gass.. the source of concentrated energy comprises a number of tanks with compressed gas..
Oppfinnelsen skal i det folgende forklares nærmere under hen-visning til de vedfoyde tegninger.:Fig. 1 viser skjematisk en davit i henhold til oppfinnelsen sett i livbåtens lengderetning. ; , \ , • i Fig. 2 viser et skjema for styring av driften av daviten vist i figur 1. The invention will be explained in more detail in the following with reference to the attached drawings.: Fig. 1 schematically shows a davit according to the invention seen in the lifeboat's longitudinal direction. ; , \ , • in Fig. 2 shows a diagram for controlling the operation of the davit shown in Fig. 1.
X X
Daviten vist i figur 1 omfatter en bærearm 1 som kan svingeThe davit shown in figure 1 comprises a support arm 1 which can swing
om en horisontal aksel 2 festet til et dekk 3. Figuren viser også skroget 4 til den sjogående innretning. Bærearmen ligger i utenbords stilling (vist med strekpunktlinjer) i vinkel med vertikalretningen, på en fast understøttelse 6 ved hjelp av about a horizontal shaft 2 attached to a deck 3. The figure also shows the hull 4 of the seagoing device. The support arm lies in the outboard position (shown with dotted lines) at an angle to the vertical direction, on a fixed support 6 by means of
en stottearm 5 som er forbundet med dekket 3 i vertikal stil-a support arm 5 which is connected to the tire 3 in a vertical style
ling. Til en trekantet plate 7, som er festet mellom.bærearmen 1 og stottearmen 5, er svingeakselén 8 festet, og stempelstangen ling. To a triangular plate 7, which is attached between the support arm 1 and the support arm 5, the swing axle 8 is attached, and the piston rod
9 for en hydraulisk jekk 10, som med den annen ende 11 er sving-9 for a hydraulic jack 10, which with the other end 11 is swing-
bart festet til holderen 12, forbundet med dekket 3, idet holderen også bærer svingeakselén 2. must be attached to the holder 12, connected to the tire 3, as the holder also carries the swing axle 2.
Bærearmen 1 har en trinse 13 for en kabel 14 nær sin ovre ende, til hvilen kabel en livbåts er opphengt i daviten.Denne kabel 14 går til en vinsj som kabelen kan trekkes ut fra eller vikles på. The support arm 1 has a pulley 13 for a cable 14 near its upper end, until the rest cable of a lifeboat is suspended in the davit. This cable 14 goes to a winch from which the cable can be pulled out or wound on.
Virkemåten for daviten er som folger: Den hydrauliske jekk 10 manovreres ved hjelp av en kilde med konsentrert energi, med hvilken stempelstangen 9 skyves ut og armen 1 beveges fra den innenbords stilling,vist i figur 11 med heltrukne linjer,forbi vertikal stilling til utenbords stilling, vist med, strekpunktlinjer. Livbåten S er vist i to forskjellige utenbords stillinger, The operation of the davit is as follows: The hydraulic jack 10 is maneuvered using a source of concentrated energy, with which the piston rod 9 is pushed out and the arm 1 is moved from the inboard position, shown in figure 11 with solid lines, past the vertical position to the outboard position , shown with, dash-dotted lines. The lifeboat S is shown in two different outboard positions,
vist med strekpunktlinjer, hvilke stillinger tilsvarer to forskjellige helningsvinkler for dekket 3. Daviten i henhold shown with dotted lines, which positions correspond to two different angles of inclination for the deck 3. The davit according
til oppfinnelsen kan bringe livbåten S til utenbords stilling ved de forskjelligste helningsvinkler, slik at den kan senkes til vannoverflaten. to the invention can bring the lifeboat S to the outboard position at the most different angles of inclination, so that it can be lowered to the surface of the water.
I figur 2 er skjematisk vist koblingsopplégget for de toFigure 2 schematically shows the connection arrangement for the two
hydrauliske jekker 10, som hver er forbundet med en bærearm:hydraulic jacks 10, each of which is connected to a support arm:
nær den fremre eller bakre ende av livbåten S.near the fore or aft end of the lifeboat S.
Energikilden utgjores av en akkumulator 16, som på en side inneholder en gass under meget hoyt trykk, f.eks. 5 liter nitrogen under 140 ato, mens den på den annen side inneholder "C hydraulisk fluid, f.eks. 45 liter olje. Ved hjelp av den komprimerte gass kan det hydrauliske fluid fores via regulerings-ventilen 17 og roret 18 til den ene ende av sylidrené 10, slik^ at det hydrauliske fluid trykker mot fremsiden av stmpélet 19. På denne måte beveges stempelstengene 9 i retning ut av sylind-rene 10, og bevegelsen av bærearmen fra sin stilling innenbords The energy source is made up of an accumulator 16, which on one side contains a gas under very high pressure, e.g. 5 liters of nitrogen below 140 ato, while on the other hand it contains "C hydraulic fluid, e.g. 45 liters of oil. With the help of the compressed gas, the hydraulic fluid can be fed via the control valve 17 and the rudder 18 to one end of cylinder liner 10, so that the hydraulic fluid presses against the front of the piston 19. In this way, the piston rods 9 are moved in the direction out of the cylinders 10, and the movement of the support arm from its position inboard
til utenbords finner sted. - until outboard takes place. -
Jekkene 10 er utstyrt med styreventiler 20, ved hjelp av hvilke det hydrauliske fluid også kan bringes til baksiden av stempelt. The jacks 10 are equipped with control valves 20, by means of which the hydraulic fluid can also be brought to the rear of the piston.
Det hydrauliske fluid kommer via styreventilen 21, som har tre stillinger. I stilling 0 er alt stengt, i stilling 1 trykker gassen fra akkumulatoren 16 stempelstengene 9 utover, hvorved fluidet på stempelstangsiden strommer til reservoaret 22 for pumpen 23 gjennom styreventilene 20, hvilken pumpe fortrinns- The hydraulic fluid comes via the control valve 21, which has three positions. In position 0 everything is closed, in position 1 the gas from the accumulator 16 pushes the piston rods 9 outwards, whereby the fluid on the piston rod side flows to the reservoir 22 for the pump 23 through the control valves 20, which pump is preferred
vis drives av motoren M. I stilling 2 trykker pumpen 23 stempelstengene innover, og akkumulatoren oppnår igjen hovedsakelig sitt opprinnelige trykk. vis is driven by the motor M. In position 2, the pump 23 pushes the piston rods inward, and the accumulator again achieves mainly its original pressure.
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL777708953A NL7708953A (en) | 1977-08-12 | 1977-08-12 | DAVIT FOR A RESCUE CRAFT OF A MARINE INSTALLATION. |
Publications (1)
Publication Number | Publication Date |
---|---|
NO773895L true NO773895L (en) | 1979-02-13 |
Family
ID=19829008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO773895A NO773895L (en) | 1977-08-12 | 1977-11-14 | DAVIT. |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5431190A (en) |
DE (1) | DE2750579A1 (en) |
FI (1) | FI773394A (en) |
NL (1) | NL7708953A (en) |
NO (1) | NO773895L (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL168291C (en) * | 1979-03-11 | 1982-03-16 | Breejen Beheer | CRANE FOR A DREDGER OF A DREDGING VESSEL. |
-
1977
- 1977-08-12 NL NL777708953A patent/NL7708953A/en not_active Application Discontinuation
- 1977-11-11 FI FI773394A patent/FI773394A/en not_active Application Discontinuation
- 1977-11-11 DE DE19772750579 patent/DE2750579A1/en active Pending
- 1977-11-14 JP JP13578077A patent/JPS5431190A/en active Pending
- 1977-11-14 NO NO773895A patent/NO773895L/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPS5431190A (en) | 1979-03-07 |
NL7708953A (en) | 1979-02-14 |
FI773394A (en) | 1979-02-13 |
DE2750579A1 (en) | 1979-02-22 |
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