US20180118454A1 - Leak Preventing Device and Tank for Transporting Liquid With such a Device - Google Patents
Leak Preventing Device and Tank for Transporting Liquid With such a Device Download PDFInfo
- Publication number
- US20180118454A1 US20180118454A1 US15/568,039 US201615568039A US2018118454A1 US 20180118454 A1 US20180118454 A1 US 20180118454A1 US 201615568039 A US201615568039 A US 201615568039A US 2018118454 A1 US2018118454 A1 US 2018118454A1
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- United States
- Prior art keywords
- tank
- floating body
- hose
- preventing device
- leak preventing
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- 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.)
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- 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
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
Definitions
- the present invention relates to a leak preventing device according to the preamble of claim 1 for preventing liquid from leaking out of a damaged tank.
- the invention also relates to a tank for transporting liquid provided with such a device.
- Liquid fuel and other types of liquids may be transported and stored in tanks of various types. If such a tank is damaged, for instance due to an accident or wear, the liquid in the tank may leak to the surrounding environment, which may cause a lot of problem, for instance in the form of material damages, environmental pollution and health and safety hazards for people in the vicinity of the leaking tank. It is previously known, for instance from GB 1 020 581 A and DE 1 525 465 B, that liquid may be prevented from leaking out through a leak below the surface of the liquid in a tank by producing a sufficient underpressure in a gas-filled space above the surface of the liquid in the tank by means of a vacuum pump.
- a leak preventing device is previously known from WO 87/02650 A1.
- This previously known device has the form of a leak sealing pad which is to be attached to an outer wall of a tank so as to cover a leak opening in the tank wall and thereby prevent gas or liquid from flowing out of the tank through the leak opening.
- the pad is pressed against the tank wall under the effect of an underpressure generated in a vacuum chamber of the pad by means of a vacuum pump.
- this leak preventing device is only suitable for use when it comes to an easily accessible leak concentrated to a limited area.
- the object of the present invention is to provide a new and favourable leak preventing device for preventing liquid from leaking out of a damaged tank.
- the above-mentioned object is achieved by a leak preventing device having the features defined in claim 1 .
- the leak preventing device of the present invention comprises:
- a leak-preventing underpressure may be achieved inside a tank in a simple manner.
- a vacuum pump is to be connected to the flexible hose inside the tank and the vacuum pump is to be operated in order to draw off gas from the gas-filled space in the tank above the surface of the liquid in the tank via the flexible hose and thereby produce an underpressure in said space sufficient for preventing liquid from continuing to leak out of the tank through said leak.
- the floating body will always float at the surface of the liquid in the tank irrespective of the prevailing inclination of the tank, and the floating body may thereby ensure that the flexible hose always is maintained in fluid communication with the gas-filled space in the tank above the surface of the liquid in the tank. Furthermore, the leak preventing device of the present invention may be used even if the leak opening is inaccessible.
- said first end of the hose is fixed to the floating body in such a manner that the hose projects from the underside of the floating body at the centre thereof.
- the weight of the hose will contribute in keeping the floating body floating in a correct position with its underside facing vertically downwards.
- said second end of the hose is connected to a shut-off valve, which is fixed to the tank and accessible from the outside of the tank.
- the shut-off valve makes it easy to put the flexible hose inside the tank in communication with a vacuum pump when so needed and to otherwise keep the flexible hose disconnected from the ambient air.
- said shut-off valve is connected to a coupling member, which is configured for releasable engagement with a corresponding coupling member arranged at an end of a suction hose from a vacuum pump.
- a vacuum pump may easily and rapidly be connected to the flexible hose inside the tank when so needed.
- the flexible hose is connected to one or more further shut-off valves, which are fixed to the tank at a distance from each other and accessible from the outside of the tank, wherein each such further shut-off valve is connected to a coupling member which is configured for releasable engagement with a corresponding coupling member arranged at an end of a suction hose from a vacuum pump.
- Each shut-off valve with its associated coupling member constitutes an access point through which a vacuum pump may be connected to the flexible hose inside the tank.
- the invention also relates to a tank for transporting liquid having the features defined in claim 11 .
- FIG. 1 is a schematic longitudinal section through a tank provided with a leak preventing device according to an embodiment of the present invention
- FIG. 2 is a schematic longitudinal section through the tank of FIG. 1 , as seen with a vacuum pump connected to the flexible hose inside the tank,
- FIG. 3 is a detail enlargement of the encircled area III in FIG. 1
- FIG. 4 is a detail enlargement of the encircled area IV in FIG. 2 .
- FIG. 5 is a schematic perspective view from below of a floating body included in the leak preventing device of FIG. 1 ,
- FIG. 6 is a schematic perspective view from above of the floating body of FIG. 5 .
- FIG. 7 is a schematic vertical section through the floating body of FIGS. 5 and 6 .
- FIG. 8 is a schematic planar view from above of the floating body of FIGS. 5 and 6 .
- FIG. 9 is a schematic vertical section through a floating body according to an alternative variant.
- a leak preventing device 1 according to an embodiment of the present invention is schematically illustrated in FIGS. 1-4 .
- the leak preventing device 1 is to be used with a tank 2 for transporting and/or storing liquid in order to prevent liquid from leaking out of the tank through a hole or crack in a wall of the tank below the surface 3 of the liquid in the tank if the tank is damaged due to an accident or wear.
- the leak preventing device 1 is to be pre-mounted to the tank 2 so as to be ready for use in a possible situation when the tank is damaged and liquid starts to leak out of the tank.
- the leak preventing device 1 comprises a floating body 4 which is configured to have such a buoyancy that it is capable of floating at the surface 3 of the liquid in the tank 2 with at least an upper part of the floating body 4 located above the surface 3 of the liquid in the tank.
- the leak preventing device 1 also comprises a flexible hose 5 with a first end 6 a and an opposite second end 6 b .
- the first end 6 a of the hose is fixed to the floating body 4 and the hose 5 is fixed to a wall 7 of the tank 2 at a point of attachment 8 at a distance from said first end 6 a , wherein the hose 5 extends freely inside the tank 2 between the floating body 4 and said point of attachment 8 .
- the second end 6 b of the hose is connected or connectable to a suction side of a vacuum pump 9 (see FIG. 2 ) so as to allow the vacuum pump to draw off gas via the hose 5 from a gas-filled space 10 in the tank 2 above the floating body 4 and above the surface 3 of the liquid in the tank in order to reduce the pressure in said space 10 to such a low value that leakage of liquid from the tank 2 through a possible leak below the surface 3 of the liquid is prevented.
- the second end 6 b of the hose is connected to a shut-off valve 11 , which is fixed to the tank 2 and accessible from the outside of the tank.
- the shut-off valve 11 is connected to a coupling member 13 which is configured for releasable engagement with a corresponding coupling member 14 (see FIG. 4 ) arranged at an end of a suction hose 15 from a vacuum pump 9 .
- the flexible hose 5 is with advantage connected to two or more shut-off valves 11 which are fixed to the tank 2 at a distance from each other and accessible from the outside of the tank 2 , as illustrated in FIGS. 1-4 , wherein each shut-off valve 11 is connected to a coupling member 13 configured for releasable engagement with a corresponding coupling member 14 arranged at an end of a suction hose 15 from a vacuum pump 9 .
- the leak preventing device 1 comprises three shut-off valves 11 with associated coupling members 13 .
- the shut-off valves 11 are connected to each other by means of connecting pipes 16 which are mounted to the tank 2 on the outside thereof.
- the connecting pipes 16 may as an alternative be mounted inside the tank 2 .
- Each shut-off valve 11 comprises a valve member (not shown) which is moveable by means of a maneuvering member 12 between a closed position and an open position.
- the maneuvering member 12 may for instance have the form of a lever or knob.
- the suction hose 15 of the vacuum pump 9 is to be connected to one of the shut-off valves 11 when need arises.
- the leak preventing device of the present invention may as an alternative comprise a vacuum pump which is permanently connected to the flexible hose 5 inside the tank 2 via a shut-off valve 11 .
- the first end 6 a of the flexible hose 5 is with advantage fixed to the floating body 4 in such a manner that the hose 5 projects from the underside 17 a of the floating body at the centre thereof, as illustrated in FIGS. 5 and 7 .
- the floating body 4 is provided with a suction channel 18 , wherein the first end 6 a of the flexible hose 5 is connected to a lower end 19 a of the suction channel 18 and an inlet opening 20 is arranged at an upper end 19 b of the suction channel 18 .
- the inlet opening 20 is provided in a part of the floating body 4 which is configured to be located above the surface 3 of the liquid in the tank 4 when the floating body 4 is floating at the surface 3 of the liquid in the tank.
- the suction channel 18 extends across the floating body 4 from the underside 17 a of the floating body to the upper side 17 b thereof along the centre axis of the floating body 4 .
- the inlet opening 20 of the suction channel 18 is arranged at the upper end of a pipe 21 which projects from the upper side 17 b of the floating body 4 , wherein the upper end of the pipe 21 is received in a cover 22 which is configured to prevent liquid from splashing into the suction channel 18 through the inlet opening 20 .
- the cover 22 is fixed to the pipe 21 by means of a supporting member 23 in the form of a plate or the similar, wherein gas is allowed to flow into the cover 22 towards the inlet opening 20 of the suction channel 18 through gaps 24 between the supporting member 23 and an inner wall of the cover 22 , as illustrated in FIGS. 7 and 8 , or through gaps in the supporting member 23 .
- a check valve 25 is arranged at the inlet opening 20 of the suction channel 18 in order to keep the inlet opening closed when no gas to is drawn off via the flexible hose 5 from the gas-filled space 10 above the surface 3 of the liquid in the tank 2 .
- the check valve 25 comprises a valve member 26 , for instance in the form of a disc, which is moveably mounted to the float 4 at the upper end 19 b of the suction channel 18 .
- valve member 26 Under the effect of a suction effect in the suction channel 18 produced by a vacuum pump 9 , the valve member 26 is moveable from a closed position, in which the valve member 26 covers the inlet opening 20 of the suction channel 18 and thereby prevents liquid from splashing into the suction channel 18 through the inlet opening 20 , to an open position, in which the valve member 26 is swung away from the inlet opening 20 .
- a stop member 27 is with advantage arranged at the inlet opening 20 of the suction channel 18 in order to define the closed position of the valve member 26 , wherein the valve member 26 is configured to abut against this stop member 27 in its closed position.
- the valve member 26 is preferably spring-loaded so as to assume its closed position under the effect of the spring force from a spring member (not shown) acting on the valve member 26 .
Abstract
A leak preventing device (1) for preventing liquid from leaking out of a damaged tank (2), the device comprising:—a floating body (4) capable of floating at the surface (3) of the liquid in the tank; and—a flexible hose (5), the first end of the hose being fixed to the floating body and the hose being fixed to a wall of the tank at a point of attachment (8) at a distance from said first end, wherein the hose extends freely inside the tank between the floating body and said point of attachment and wherein the second end of the hose is connectable to a suction side of a vacuum pump(9) so as to allow gas to be drawn off via the hose from a gas-filled space (10) in the tank above the surface of the liquid in order to produce an under pressure in said space. The invention also relates to a tank for transporting liquid provided with such a device.
Description
- The present invention relates to a leak preventing device according to the preamble of claim 1 for preventing liquid from leaking out of a damaged tank. The invention also relates to a tank for transporting liquid provided with such a device.
- Liquid fuel and other types of liquids may be transported and stored in tanks of various types. If such a tank is damaged, for instance due to an accident or wear, the liquid in the tank may leak to the surrounding environment, which may cause a lot of problem, for instance in the form of material damages, environmental pollution and health and safety hazards for people in the vicinity of the leaking tank. It is previously known, for instance from GB 1 020 581 A and DE 1 525 465 B, that liquid may be prevented from leaking out through a leak below the surface of the liquid in a tank by producing a sufficient underpressure in a gas-filled space above the surface of the liquid in the tank by means of a vacuum pump.
- A leak preventing device is previously known from WO 87/02650 A1. This previously known device has the form of a leak sealing pad which is to be attached to an outer wall of a tank so as to cover a leak opening in the tank wall and thereby prevent gas or liquid from flowing out of the tank through the leak opening. The pad is pressed against the tank wall under the effect of an underpressure generated in a vacuum chamber of the pad by means of a vacuum pump. However, this leak preventing device is only suitable for use when it comes to an easily accessible leak concentrated to a limited area.
- The object of the present invention is to provide a new and favourable leak preventing device for preventing liquid from leaking out of a damaged tank.
- According to the present invention, the above-mentioned object is achieved by a leak preventing device having the features defined in claim 1.
- The leak preventing device of the present invention comprises:
-
- a floating body with a buoyancy which makes it capable of floating at the surface of the liquid in the tank with at least an upper part of the floating body located above the surface of the liquid in the tank; and
- a flexible hose with a first end and an opposite second end, the first end of the hose being fixed to the floating body and the hose being fixed to a wall of the tank at a point of attachment at a distance from said first end, wherein the hose extends freely inside the tank between the floating body and said point of attachment and wherein the second end of the hose is connected or connectable to a suction side of a vacuum pump so as to allow gas to be drawn off via the hose from a gas-filled space in the tank above the surface of the liquid in the tank in order to produce an underpressure in said space.
- With the leak preventing device of the present invention, a leak-preventing underpressure may be achieved inside a tank in a simple manner. When liquid leaks out of the tank through a leak below the surface of the liquid in the tank, for instance when the tank has been damaged due to an accident, a vacuum pump is to be connected to the flexible hose inside the tank and the vacuum pump is to be operated in order to draw off gas from the gas-filled space in the tank above the surface of the liquid in the tank via the flexible hose and thereby produce an underpressure in said space sufficient for preventing liquid from continuing to leak out of the tank through said leak. The floating body will always float at the surface of the liquid in the tank irrespective of the prevailing inclination of the tank, and the floating body may thereby ensure that the flexible hose always is maintained in fluid communication with the gas-filled space in the tank above the surface of the liquid in the tank. Furthermore, the leak preventing device of the present invention may be used even if the leak opening is inaccessible.
- According to an embodiment of the invention, said first end of the hose is fixed to the floating body in such a manner that the hose projects from the underside of the floating body at the centre thereof. Hereby, the weight of the hose will contribute in keeping the floating body floating in a correct position with its underside facing vertically downwards.
- According to another embodiment of the invention, said second end of the hose is connected to a shut-off valve, which is fixed to the tank and accessible from the outside of the tank. The shut-off valve makes it easy to put the flexible hose inside the tank in communication with a vacuum pump when so needed and to otherwise keep the flexible hose disconnected from the ambient air.
- According to another embodiment of the invention, said shut-off valve is connected to a coupling member, which is configured for releasable engagement with a corresponding coupling member arranged at an end of a suction hose from a vacuum pump. Hereby, a vacuum pump may easily and rapidly be connected to the flexible hose inside the tank when so needed.
- According to another embodiment of the invention, the flexible hose is connected to one or more further shut-off valves, which are fixed to the tank at a distance from each other and accessible from the outside of the tank, wherein each such further shut-off valve is connected to a coupling member which is configured for releasable engagement with a corresponding coupling member arranged at an end of a suction hose from a vacuum pump. Each shut-off valve with its associated coupling member constitutes an access point through which a vacuum pump may be connected to the flexible hose inside the tank. By providing several such access points, the risk that the tank, in connection with an accident, would end up in a position in which no access to the flexible hose inside the tank is possible is reduced.
- Further advantageous features of the leak preventing device of the present invention will appear from the following description and the dependent claims.
- The invention also relates to a tank for transporting liquid having the features defined in claim 11.
- Further advantageous features of the tank of the present invention will appear from the following description.
- With reference to the appended drawings, a specific description of embodiments of the invention cited as examples follows below. In the drawings:
-
FIG. 1 is a schematic longitudinal section through a tank provided with a leak preventing device according to an embodiment of the present invention, -
FIG. 2 is a schematic longitudinal section through the tank ofFIG. 1 , as seen with a vacuum pump connected to the flexible hose inside the tank, -
FIG. 3 is a detail enlargement of the encircled area III inFIG. 1 -
FIG. 4 is a detail enlargement of the encircled area IV inFIG. 2 , -
FIG. 5 is a schematic perspective view from below of a floating body included in the leak preventing device ofFIG. 1 , -
FIG. 6 is a schematic perspective view from above of the floating body ofFIG. 5 , -
FIG. 7 is a schematic vertical section through the floating body ofFIGS. 5 and 6 , -
FIG. 8 is a schematic planar view from above of the floating body ofFIGS. 5 and 6 , and -
FIG. 9 is a schematic vertical section through a floating body according to an alternative variant. - A leak preventing device 1 according to an embodiment of the present invention is schematically illustrated in
FIGS. 1-4 . The leak preventing device 1 is to be used with atank 2 for transporting and/or storing liquid in order to prevent liquid from leaking out of the tank through a hole or crack in a wall of the tank below thesurface 3 of the liquid in the tank if the tank is damaged due to an accident or wear. Thus, the leak preventing device 1 is to be pre-mounted to thetank 2 so as to be ready for use in a possible situation when the tank is damaged and liquid starts to leak out of the tank. - The leak preventing device 1 comprises a
floating body 4 which is configured to have such a buoyancy that it is capable of floating at thesurface 3 of the liquid in thetank 2 with at least an upper part of thefloating body 4 located above thesurface 3 of the liquid in the tank. The leak preventing device 1 also comprises aflexible hose 5 with afirst end 6 a and an opposite second end 6 b. Thefirst end 6 a of the hose is fixed to thefloating body 4 and thehose 5 is fixed to awall 7 of thetank 2 at a point ofattachment 8 at a distance from saidfirst end 6 a, wherein thehose 5 extends freely inside thetank 2 between thefloating body 4 and said point ofattachment 8. The second end 6 b of the hose is connected or connectable to a suction side of a vacuum pump 9 (seeFIG. 2 ) so as to allow the vacuum pump to draw off gas via thehose 5 from a gas-filledspace 10 in thetank 2 above thefloating body 4 and above thesurface 3 of the liquid in the tank in order to reduce the pressure in saidspace 10 to such a low value that leakage of liquid from thetank 2 through a possible leak below thesurface 3 of the liquid is prevented. - In the illustrated embodiment, the second end 6 b of the hose is connected to a shut-off valve 11, which is fixed to the
tank 2 and accessible from the outside of the tank. The shut-off valve 11 is connected to acoupling member 13 which is configured for releasable engagement with a corresponding coupling member 14 (seeFIG. 4 ) arranged at an end of asuction hose 15 from avacuum pump 9. - The
flexible hose 5 is with advantage connected to two or more shut-off valves 11 which are fixed to thetank 2 at a distance from each other and accessible from the outside of thetank 2, as illustrated inFIGS. 1-4 , wherein each shut-off valve 11 is connected to acoupling member 13 configured for releasable engagement with a corresponding coupling member 14 arranged at an end of asuction hose 15 from avacuum pump 9. In the illustrated example, the leak preventing device 1 comprises three shut-off valves 11 with associatedcoupling members 13. The shut-off valves 11 are connected to each other by means of connectingpipes 16 which are mounted to thetank 2 on the outside thereof. The connectingpipes 16 may as an alternative be mounted inside thetank 2. - Each shut-off valve 11 comprises a valve member (not shown) which is moveable by means of a maneuvering
member 12 between a closed position and an open position. Themaneuvering member 12 may for instance have the form of a lever or knob. - In the illustrated embodiment, the
suction hose 15 of thevacuum pump 9 is to be connected to one of the shut-off valves 11 when need arises. However, the leak preventing device of the present invention may as an alternative comprise a vacuum pump which is permanently connected to theflexible hose 5 inside thetank 2 via a shut-off valve 11. - The
first end 6 a of theflexible hose 5 is with advantage fixed to thefloating body 4 in such a manner that thehose 5 projects from theunderside 17 a of the floating body at the centre thereof, as illustrated inFIGS. 5 and 7 . In the embodiments illustrated inFIGS. 5-9 , thefloating body 4 is provided with asuction channel 18, wherein thefirst end 6 a of theflexible hose 5 is connected to a lower end 19 a of thesuction channel 18 and an inlet opening 20 is arranged at an upper end 19 b of thesuction channel 18. Theinlet opening 20 is provided in a part of the floatingbody 4 which is configured to be located above thesurface 3 of the liquid in thetank 4 when the floatingbody 4 is floating at thesurface 3 of the liquid in the tank. In the illustrated examples, thesuction channel 18 extends across the floatingbody 4 from theunderside 17 a of the floating body to the upper side 17 b thereof along the centre axis of the floatingbody 4. - In the embodiment illustrated in
FIGS. 5-8 , the inlet opening 20 of thesuction channel 18 is arranged at the upper end of apipe 21 which projects from the upper side 17 b of the floatingbody 4, wherein the upper end of thepipe 21 is received in acover 22 which is configured to prevent liquid from splashing into thesuction channel 18 through theinlet opening 20. Thecover 22 is fixed to thepipe 21 by means of a supportingmember 23 in the form of a plate or the similar, wherein gas is allowed to flow into thecover 22 towards the inlet opening 20 of thesuction channel 18 throughgaps 24 between the supportingmember 23 and an inner wall of thecover 22, as illustrated inFIGS. 7 and 8 , or through gaps in the supportingmember 23. - In the embodiment illustrated in
FIG. 9 , acheck valve 25 is arranged at the inlet opening 20 of thesuction channel 18 in order to keep the inlet opening closed when no gas to is drawn off via theflexible hose 5 from the gas-filledspace 10 above thesurface 3 of the liquid in thetank 2. Thecheck valve 25 comprises avalve member 26, for instance in the form of a disc, which is moveably mounted to thefloat 4 at the upper end 19 b of thesuction channel 18. Under the effect of a suction effect in thesuction channel 18 produced by avacuum pump 9, thevalve member 26 is moveable from a closed position, in which thevalve member 26 covers the inlet opening 20 of thesuction channel 18 and thereby prevents liquid from splashing into thesuction channel 18 through theinlet opening 20, to an open position, in which thevalve member 26 is swung away from theinlet opening 20. Astop member 27 is with advantage arranged at the inlet opening 20 of thesuction channel 18 in order to define the closed position of thevalve member 26, wherein thevalve member 26 is configured to abut against thisstop member 27 in its closed position. Thevalve member 26 is preferably spring-loaded so as to assume its closed position under the effect of the spring force from a spring member (not shown) acting on thevalve member 26. - The invention is of course not in any way restricted to the embodiments described above. On the contrary, many possibilities to modifications thereof will be apparent to a person with ordinary skill in the art without departing from the basic idea of the invention such as defined in the appended claims.
Claims (20)
1. A leak preventing device for preventing liquid from leaking out of a damaged tank (2), wherein the leak preventing device (1) comprises:
a floating body (4) with a buoyancy which makes it capable of floating at the surface (3) of the liquid in the tank (2) with at least an upper part of the floating body (4) located above the surface (3) of the liquid in the tank (2); and
a flexible hose (5) with a first end (6 a) and an opposite second end (6 b), the first end (6 a) of the hose being fixed to the floating body (4) and the hose (5) being fixed to a wall (7) of the tank (2) at a point of attachment (8) at a distance from said first end (6 a), wherein
the hose (5) extends freely inside the tank (2) between the floating body (4) and said point of attachment (8) and
the second end (6 b) of the hose is connected or connectable to a suction side of a vacuum pump (9) to allow gas to be drawn off via the hose (5) from a gas-filled space (10) in the tank (2) above the surface (3) of the liquid in the tank (2) to produce an underpressure in said space (10).
2. A leak preventing device according to claim 1 , wherein said first end (6 a) of the hose is fixed to the floating body (4) in such a manner that the hose (5) projects from the underside (17 a) of the floating body at the centre thereof.
3. A leak preventing device according to claim 1 , wherein
a suction channel (18) is arranged in the floating body (4);
the suction channel (18) has an inlet opening (20) at its upper end, this inlet opening (20) is arranged in a part of the floating body (4) which is configured to be located above the surface (3) of the liquid in the tank (2) when the floating body (4) is floating at the surface (3) of the liquid in the tank (2); and
the first end (6 a) of the hose is connected to a lower end (19 a) of the suction channel (18).
4. A leak preventing device according to claim 3 , wherein a check valve (25) is arranged at the inlet opening (20) of the suction channel (18) to keep the inlet opening closed when no gas to is drawn off via the hose (5) from said gas-filled space (10) in the tank (2).
5. A leak preventing device according to claim 3 , wherein
the inlet opening (20) of the suction channel (18) is provided at an upper end of a pipe (21) which projects from the upper side (17 b) of the floating body (4); and
the upper end of said pipe (21) is received in a cover (22), which is configured to prevent liquid from splashing into the suction channel (18) through the inlet opening (20).
6. A leak preventing device according to claim 3 , wherein the suction channel (18) extends across the floating body (4) from the underside (17 a) of the floating body to the upper side (17 b) thereof.
7. A leak preventing device according to claim 1 , wherein said second end (6 b) of the hose is connected to a shut-off valve (11), which is fixed to the tank (2) and accessible from the outside of the tank (2).
8. A leak preventing device according to claim 7 , wherein said shut-off valve (11) is connected to a coupling member (13), which is configured for releasable engagement with a corresponding coupling member (14) arranged at an end of a suction hose (15) from a vacuum pump (9).
9. A leak preventing device according to claim 7 , wherein
the flexible hose (5) is connected to one or more further shut-off valves (11), which are fixed to the tank (2) at a distance from each other and accessible from the outside of the tank (2); and
each such further shut-off valve (11) is connected to a coupling member (13), which is configured for releasable engagement with a corresponding coupling member (14) arranged at an end of a suction hose (15) from a vacuum pump (9).
10. A leak preventing device according to claim 9 , wherein the shut-off valves (11) are connected to each other by connecting pipes (16) mounted to the tank (2) on the outside or on the inside thereof.
11. A tank for transporting liquid, wherein the tank (2) is provided with a leak preventing device (1) according to claim 1 .
12. A leak preventing device according to claim 2 , wherein
a suction channel (18) is arranged in the floating body (4);
the suction channel (18) has an inlet opening (20) at its upper end;
this inlet opening (20) is arranged in a part of the floating body (4) which is configured to be located above the surface (3) of the liquid in the tank (2) when the floating body (4) is floating at the surface (3) of the liquid in the tank (2); and
the first end (6 a) of the hose is connected to a lower end (19 a) of the suction channel (18).
13. A leak preventing device according to claim 12 , wherein a check valve (25) is arranged at the inlet opening (20) of the suction channel (18) to keep the inlet opening closed when no gas to is drawn off via the hose (5) from said gas-filled space (10) in the tank (2).
14. A leak preventing device according to claim 12 , wherein
the inlet opening (20) of the suction channel (18) is provided at an upper end of a pipe (21) which projects from the upper side (17 b) of the floating body (4); and
the upper end of said pipe (21) is received in a cover (22), which is configured to prevent liquid from splashing into the suction channel (18) through the inlet opening (20).
15. A leak preventing device according to claim 14 , wherein the suction channel (18) extends across the floating body (4) from the underside (17 a) of the floating body to the upper side (17 b) thereof.
16. A leak preventing device according to claim 13 , wherein the suction channel (18) extends across the floating body (4) from the underside (17 a) of the floating body to the upper side (17 b) thereof.
17. A leak preventing device according to claim 12 , wherein the suction channel (18) extends across the floating body (4) from the underside (17 a) of the floating body to the upper side (17 b) thereof.
18. A leak preventing device according to claim 5 , wherein the suction channel (18) extends across the floating body (4) from the underside (17 a) of the floating body to the upper side (17 b) thereof.
19. A leak preventing device according to claim 4 , wherein the suction channel (18) extends across the floating body (4) from the underside (17 a) of the floating body to the upper side (17 b) thereof.
20. A leak preventing device according to claim 15 , wherein said second end (6 b) of the hose is connected to a shut-off valve (11), which is fixed to the tank (2) and accessible from the outside of the tank (2).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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SE1550478A SE538812C2 (en) | 2015-04-22 | 2015-04-22 | Leak preventing device and tank for transporting liquid provided with such a device |
SE1550478-0 | 2015-04-22 | ||
PCT/SE2016/050330 WO2016171606A1 (en) | 2015-04-22 | 2016-04-15 | Leak preventing device and tank for transporting liquid provided with such a device |
Publications (1)
Publication Number | Publication Date |
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US20180118454A1 true US20180118454A1 (en) | 2018-05-03 |
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ID=57144452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/568,039 Abandoned US20180118454A1 (en) | 2015-04-22 | 2016-04-15 | Leak Preventing Device and Tank for Transporting Liquid With such a Device |
Country Status (7)
Country | Link |
---|---|
US (1) | US20180118454A1 (en) |
EP (1) | EP3286110A4 (en) |
JP (1) | JP2018516813A (en) |
KR (1) | KR20180011093A (en) |
CN (1) | CN107531409A (en) |
SE (1) | SE538812C2 (en) |
WO (1) | WO2016171606A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110853888A (en) * | 2019-11-21 | 2020-02-28 | 西安西电变压器有限责任公司 | Transformer vegetable oil tank and transformer oiling system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3650293A (en) * | 1970-11-25 | 1972-03-21 | Acf Ind Inc | Floating vent for railway tank car safety relieve valve |
US3672533A (en) * | 1970-12-03 | 1972-06-27 | Chemagro Corp | Floating vent device |
US5092259A (en) * | 1989-07-10 | 1992-03-03 | Mo Husain | Inert gas control in a system to reduce spillage of oil due to rupture of ship's tank |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1222329B (en) * | 1961-08-29 | 1966-08-04 | Walter Nicolai | Method and device for preventing leakage losses on liquid storage containers with negative pressure in the air space of the container |
CH423379A (en) * | 1961-08-29 | 1966-10-31 | Nicolai Walter | Device on liquid storage containers to prevent liquid leaks and to display or monitor leaks in the storage container |
DE1525465B1 (en) * | 1963-01-14 | 1970-02-12 | Klug Friedrich A Dipl Math Dip | Device for the automatic control of a vacuum pump for maintaining an internal bottom pressure in a storage container which is lower than the atmospheric ambient pressure |
GB1027147A (en) * | 1963-09-17 | 1966-04-27 | Laporte Chemical | Venting device |
DE1233676B (en) * | 1964-03-25 | 1967-02-02 | Fendel Geb | Device for setting a negative pressure in liquid storage tanks |
US5156109A (en) * | 1989-07-10 | 1992-10-20 | Mo Husain | System to reduce spillage of oil due to rupture of ship's tank |
US5333752A (en) * | 1993-02-18 | 1994-08-02 | Clawson Tank Company | Storage container unit for hazardous liquids |
US20040234338A1 (en) * | 2003-05-19 | 2004-11-25 | Monroe Thomas K. | Secondary containment monitoring system |
JP2013522130A (en) * | 2010-03-11 | 2013-06-13 | ディバーシー・インコーポレーテッド | Exhaust tube apparatus and method |
DE102010020747A1 (en) * | 2010-05-17 | 2011-11-17 | Jörg Heinz Lohse | Tank transport system for e.g. non-hazardous materials and hazardous materials, has material-moderate plastic foils or side folded tubes provided for resin of hard cell-tank and for inner liner |
CA2872993A1 (en) * | 2014-11-28 | 2015-04-16 | David Joseph Lake | Electro vac system |
-
2015
- 2015-04-22 SE SE1550478A patent/SE538812C2/en unknown
-
2016
- 2016-04-15 CN CN201680023475.XA patent/CN107531409A/en active Pending
- 2016-04-15 JP JP2017555576A patent/JP2018516813A/en active Pending
- 2016-04-15 WO PCT/SE2016/050330 patent/WO2016171606A1/en active Application Filing
- 2016-04-15 KR KR1020177033084A patent/KR20180011093A/en unknown
- 2016-04-15 EP EP16783496.9A patent/EP3286110A4/en not_active Withdrawn
- 2016-04-15 US US15/568,039 patent/US20180118454A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3650293A (en) * | 1970-11-25 | 1972-03-21 | Acf Ind Inc | Floating vent for railway tank car safety relieve valve |
US3672533A (en) * | 1970-12-03 | 1972-06-27 | Chemagro Corp | Floating vent device |
US5092259A (en) * | 1989-07-10 | 1992-03-03 | Mo Husain | Inert gas control in a system to reduce spillage of oil due to rupture of ship's tank |
Also Published As
Publication number | Publication date |
---|---|
CN107531409A (en) | 2018-01-02 |
EP3286110A4 (en) | 2018-12-05 |
KR20180011093A (en) | 2018-01-31 |
SE1550478A1 (en) | 2016-10-23 |
JP2018516813A (en) | 2018-06-28 |
WO2016171606A1 (en) | 2016-10-27 |
EP3286110A1 (en) | 2018-02-28 |
SE538812C2 (en) | 2016-12-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |