EP0628476A1 - Drucksensorkombination für ein Wasserfahrzeug und Ventil mit einem Ventilgehäuse, einem Sensorgehäuse und einem Hauptgehäuse dafür - Google Patents
Drucksensorkombination für ein Wasserfahrzeug und Ventil mit einem Ventilgehäuse, einem Sensorgehäuse und einem Hauptgehäuse dafür Download PDFInfo
- Publication number
- EP0628476A1 EP0628476A1 EP94201499A EP94201499A EP0628476A1 EP 0628476 A1 EP0628476 A1 EP 0628476A1 EP 94201499 A EP94201499 A EP 94201499A EP 94201499 A EP94201499 A EP 94201499A EP 0628476 A1 EP0628476 A1 EP 0628476A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pressure sensor
- sensor combination
- housing
- pressure
- Prior art date
- 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.)
- Granted
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/12—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude for indicating draught or load
Definitions
- the invention relates to a pressure sensor combination suitable for being mounted in the outer wall of a vessel permitting a water pressure-sensitive element of the pressure sensor combination to be in contact with the ambient water.
- the invention also relates to a valve housing with a valve, sensor housing and basic housing of this pressure sensor combination.
- Such pressure sensor combinations are known from Dutch patent application No. 9001376 and are commonly used for determining the draft of a vessel and, accordingly, the weight of the load of the vessel.
- this water displacement is directly related to the weight of the ship and hence also to the load of the ship.
- a pressure sensor combination mounted at a known position in the wall of a vessel measures the water pressure adjacent to the wall of the ship.
- this water pressure is directly proportional to the height difference between the water surface and the pressure-sensitive element of the pressure sensor combination.
- the draft of the vessel is known, enabling determination of the weight of the load.
- the pressure sensor combination is connected to an apparatus to which output signals from one or more pressure sensor combinations, which are a measure for the above-mentioned water pressure, are fed.
- the apparatus determines the weight of the load, which weight may subsequently be directly shown on a display.
- a drawback of these pressure sensor combinations is that the pressure-sensitive element may easily be damaged, especially during sailing.
- the pressure-sensitive element usually comprises a diaphragm which, in mounted condition, is located adjacent to the bottom face of the wall of the ship. Consequently, the pressure-sensitive element is particularly vulnerable and may for instance easily be damaged by objects and dirt floating in the ambient water.
- the pressure sensor combination is placed in the bottom of the vessel, as a result of which this vulnerability increases much further.
- An inland ship, for instance will often grind over the bottom of a river or canal, so that the pressure-sensitive element may be heavily damaged and consequently becomes entirely useless.
- a possible solution for preventing the pressure-sensitive element from being damaged could be found in placing the pressure-sensitive element by a certain depth within the outer surface of the ship surface, so that it can be damaged less easily.
- this has as a drawback that an air bubble of an unknown size may be located between the pressure-sensitive element and the outer surface of the ship surface.
- a lower water pressure will be measured by the pressure-sensitive element and an unknown difference in draft will be measured, corresponding to the unknown vertical height of the air column which is located under the pressure-sensitive element. If this vertical height of the air column is for instance 1 cm, a draft will be measured which is 1 cm less than the actual draft.
- the object of the invention is to overcome all above-mentioned drawbacks, and to this end, the invention is characterized in that the pressure sensor combination comprises a movable valve capable of at least partly releasing and closing a passage from the ambient water to the pressure-sensitive element. If necessary, the valve will close this passage so as to protect the pressure-sensitive element against damage from outside.
- the pressure-sensitive element directly below the bottom face of the pressure sensor combination, so that the vertical height of the above-mentioned air column is bound to a well and acceptably defined maximum.
- the inaccuracy of the pressure sensor combination is also known. This involves the possibility of determining the above-mentioned draft with an inaccuracy which is for instance less than 3 mm.
- the pressure sensor combination comprises a channel which originates adjacent to the pressure-sensitive element and ends in an opening of the pressure sensor combination to the ambient water, the valve being coupled to the rest of the pressure sensor combination for movement in the longitudinal direction of the channel through a limited path, and the valve in a first extreme position at least partly releasing the opening and in a second extreme position at least partly closing the opening. In this second extreme position, the pressure-sensitive element cannot be damaged from outside.
- the valve at least partly releases the opening when no external forces are being applied to the valve. Hence, if there is no a danger that the pressure-sensitive element can be damaged, this passage is released.
- the valve will at least partly release the opening under the influence of gravity, when no external forces are being applied to the valve. This is important in particular when the pressure sensor combination is mounted in the bottom of a vessel. However, it is also possible to use for instance a spring for releasing the opening at least partly when no external forces are being applied to the valve. This last will commonly be used when the pressure sensor combination is mounted in a side wall of the vessel.
- a part of the valve when the pressure sensor combination is mounted in the wall of the vessel, a part of the valve is located outside the wall of the vessel in the ambient water when it is in the first extreme position and inside the wall of the vessel when it is in the second extreme position. Hence, when the wall of the vessel chafes along an object or the bottom, this part of the valve will be pushed toward the second extreme position and accordingly protect the pressure-sensitive element.
- the channel at least comprises a first and a second channel portion, adjoining each other, the first channel portion being located adjacent to the opening, the second channel portion being located between the first channel portion and the pressure-sensitive element, the valve at least comprising a first and a second valve part, adjoining each other, the second valve part being at least partly located within the second channel portion, the first valve part having a largest diameter which is greater than a smallest diameter of the second channel portion and smaller than the diameter of the opening, the first valve part in the first extreme position being at least partly located outside the first channel portion and in the second extreme position being located inside the first channel portion and closes this passage accordingly.
- the pressure sensor combination comprises a bottom face wherein the above-mentioned opening is located, the second valve part having a convex outer surface, an edge of which, in the first position, is precisely within the bottom face.
- the valve will not start vibrating during sailing and ensure a proper streamlining of the wall of the vessel.
- the valve will react very adequately to an object, river bottom or dirt which threatens to damage the pressure-sensitive element.
- the channel comprises a third channel portion, located between the pressure-sensitive element and the second channel portion
- the valve comprises a third valve part at least partly located inside the third channel portion, adjoining the second valve part and having a largest diameter greater than the smallest diameter of the second channel portion.
- the valve is connected to the rest of the pressure sensor combination so as to be movable in a very simple manner.
- the first channel portion and the first valve part taper off, at least partly, in the direction from the opening to the pressure-sensitive element. This ensures a proper sealing in the second extreme position.
- the pressure sensor combination comprises a valve housing on which the valve is movably mounted, the second channel portion being located inside the valve housing.
- the first and third channels are at least partly located inside the valve housing.
- the pressure sensor combination comprises a sensor housing wherein the pressure-sensitive element is contained, the pressure-sensitive element of the sensor housing in mounted condition being located adjacent to a side of the valve housing facing away from the outer side. This has as an effect that mounting and dismounting is easy.
- the sensor housing can easily be changed without removal of the valve. This also provides the possibility of using an at least practically unmodified, known sensor housing to which a valve housing with a valve are added.
- the pressure sensor combination comprises a basic housing suitable for being mounted in an opening of the wall of a vessel, the valve housing in mounted condition being located inside the basic housing and the sensor housing in mounted condition being at least partly located inside the basic housing.
- the valve housing, sensor housing and basic housing are cylindrical.
- the cylinder outer surface of the valve housing and at least a part of the sensor housing are provided with a thread and the cylinder inner surface of the basic housing is at least partly provided with a thread permitting the valve housing and the sensor housing to be screwed into the basic housing.
- the pressure sensor combination comprises control means for operably bringing the valve from the first to the second extreme position and vice versa.
- the valve can for instance be brought into its second extreme position from the pilot house when it is known that the danger of damage to the pressure-sensitive element is substantial.
- This can be realized in a very simple manner by providing the valve with a permanent magnetic material and bringing it from the first to the second extreme position and vice versa by means of a controllable, reversible magnetic field.
- reference numeral 1 designates a ship wall wherein, in Fig. 1, a pressure sensor combination 2 is mounted.
- the ship wall is the flat, practically horizontal bottom of the vessel, but it may also be a side wall of the ship.
- the pressure sensor combination is placed in a horizontal bottom 1 of a vessel.
- the pressure sensor combination comprises a valve housing 4 accommodating a valve 6 which, in this case, is movable up and down through a limited path.
- the pressure sensor combination comprises a sensor housing 8, accommodating, at the bottom end thereof, a water pressure-sensitive element 10.
- the water pressure-sensitive element 10 comprises a diaphragm.
- a water pressure measured by the pressure-sensitive element is converted into a signal which represents this pressure on line 12.
- the pressure sensor combination comprises a basic housing 14 mounted in an opening 16 of the ship wall 1.
- the basic housing is connected to the ship wall 1 by a weld 18 on the inside 20 of the vessel.
- the outside of the vessel, i.e. the ambient water, is designated by reference numeral 22.
- the pressure-sensitive element 10 is in communication with the ambient water via a passage 24, to be further described hereinafter, which ends in an opening 26 in the bottom face 28 of the pressure sensor combination 2.
- the pressure sensor combination comprises the passage 24, composed of a first channel portion 30 partly tapering off in the direction from the opening 26 to the pressure-sensitive element 10. Adjacent to the opening 26 and as far as the opening, however, the first channel portion 30 has a constant diameter through a path here designated by reference numeral 32.
- a second channel portion 34 is located between the first channel portion and the pressure-sensitive element 10. The second channel portion 34 has a constant diameter and directly adjoins the first channel portion 30.
- the pressure sensor combination comprises a third channel portion 36, adjoining the pressure-sensitive element 10 on the one hand and the second channel portion 34 on the other.
- the pressure-sensitive element is slightly recessed in the sensor housing as indicated by reference numeral 38. This involves that the side wall of the first channel portion 30 is formed by a portion of the basic housing 14 and a portion of the valve housing 4. The side wall of the second channel portion 34 is formed by the valve housing. The side wall of the third channel portion 36 is formed by a portion of the valve housing 4 and a portion of the sensor housing 8.
- the valve 6 is composed of a first valve part 40 which tapers off in the direction from the opening 26 to the pressure-sensitive element 10 and has a convex surface 42.
- a second valve part 44 directly adjoins the first valve part 40 and has a constant diameter.
- the valve 6 comprises a third valve part 46 which directly adjoins the second valve part 44 and tapers off in the direction from the pressure-sensitive element 10 to the opening 26.
- the third valve part 46 further comprises at least one valve channel 47 as shown in Fig. 3 in a view according to the arrow p of Fig. 2.
- the depth a in radial direction of the valve channel 47 is constructed so as extend at least beyond the side wall 49 of the second channel portion 34, so that in a first extreme position an open communication 51 is present between the third and the second channel portion.
- the largest diameter d3 of the third valve part 46 is greater than the smallest diameter D2 of the second channel portion 34, which, in this case, is constant. Consequently, when the pressure sensor combination is disposed in a horizontal bottom 1, the valve 6 cannot fall from the valve housing 4.
- the largest diameter d1 of the first valve part 40 is also greater than the smallest diameter D2 of the second channel portion 34. As a result, the path of travel of the valve is also limited in the direction from the opening 26 to the pressure-sensitive element 10.
- the first and second valve parts 40, 46 function as members cooperating with the valve housing 4, which determine the first and second extreme positions.
- the first valve part 40 in cooperation with the valve housing 4, functions as a shut-off member when the valve 6 is in the second extreme position.
- the largest diameter dl of the first valve part is smaller than the diameter D1 of the opening 26.
- the largest diameter of the third valve part 46 is also smaller than the smallest diameter D3 of a third channel portion 36 located in the valve housing.
- the largest diameter d2 of the second valve part 44 is smaller than the smallest diameter D2 of the second channel portion 34.
- the length H2 of the second channel portion 34 is smaller than the length h2 of the second valve part 44 in the longitudinal direction of the second channel portion 34.
- the passage 24 In a first extreme position, as is shown in Figs 1 and 2, the passage 24 is not closed off. However, when the wall of the ship, and in particular the surface 42 of the valve 6 contacts an object, this object will move the valve 6 in the direction of the pressure-sensitive element and in a second extreme position, shown in Fig. 4, close the passage 24. As a result, the pressure-sensitive element is well-protected against damage. Also in the case where the bottom of the vessel grinds over the ground, the valve 6 will be moved toward the second extreme position through the contact with the bottom.
- the edge 48 of the first valve part 40 is precisely within the opening 26, i.e. precisely below the bottom face 26. This prevents the valve from fluttering and vibrating, possibly, during sailing, due to the flow of the ambient water.
- the valve 6 is preferably entirely within the basic housing (see Fig. 4), so that it cannot be damaged when the ship wall 1 for instance grinds over the bottom of a river.
- the pressure sensor combination may moreover be provided with a spring 50, causing the valve 6 to move toward its first extreme position when no external forces are being applied to the valve 6. This allows the pressure sensor combination also to be used successfully in a practically vertical wall of a vessel.
- valve housing 4, valve 6, sensor housing 8 and basic housing 14 are rotational-symmetric round an axis through arrow p.
- the outside of the valve housing 4 and the sensor housing are provided with thread 52.
- the inside of the basic housing 14 is provided with thread 54 which is complementary to the thread 52.
- the valve housing can be screwed into the basic housing 14 from the inside of a vessel.
- the sensor housing can be screwed into the basic housing onto the valve housing 4.
- valve 6 of a permanent magnetic material and to construct the sensor housing and the valve housing of a material which is difficult to magnetize.
- a magnetic field can be generated which selectively moves the valve 6 toward a first or second extreme position, depending on the direction of the magnetic field.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9300897 | 1993-05-26 | ||
NL9300897A NL9300897A (nl) | 1993-05-26 | 1993-05-26 | Druksensor-combinatie voor een vaartuig en klep met klephuis, sensorhuis en basishuis hiervan. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0628476A1 true EP0628476A1 (de) | 1994-12-14 |
EP0628476B1 EP0628476B1 (de) | 1998-03-18 |
Family
ID=19862443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19940201499 Expired - Lifetime EP0628476B1 (de) | 1993-05-26 | 1994-05-26 | Drucksensorkombination für ein Wasserfahrzeug und Ventil mit einem Ventilgehäuse, einem Sensorgehäuse und einem Hauptgehäuse dafür |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0628476B1 (de) |
DE (1) | DE69409036T2 (de) |
NL (1) | NL9300897A (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2160035A1 (es) * | 1999-02-23 | 2001-10-16 | Univ Cadiz | Procedimiento automatizado para el calculo en tiempo real del peso de la arena transportada en un ganguil o draga autoportante. |
NL1029071C2 (nl) | 2005-05-18 | 2006-11-21 | Sygo B V | Werkwijze en inrichting voor het bepalen van de diepgang van een boot. |
JP2014144776A (ja) * | 2014-05-20 | 2014-08-14 | Mitsubishi Heavy Ind Ltd | 船舶の気泡回収装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB183719A (en) * | 1921-08-15 | 1922-08-03 | Frank Wilber Merritt | Improvements in means for automatically registering a ship's draft |
US3020504A (en) * | 1958-12-24 | 1962-02-06 | Bourns Inc | Pressure transducer |
FR2006829A1 (de) * | 1968-04-24 | 1970-01-02 | Siemens Ag | |
US3765364A (en) * | 1972-07-26 | 1973-10-16 | J Booth | Flush-through port device |
FR2341849A1 (fr) * | 1976-02-23 | 1977-09-16 | Bourdon Ets | Dispositif d'event de securite pour manometre et analogue |
US4289457A (en) * | 1979-07-30 | 1981-09-15 | Porter Carl W | Combination sea valve and deballast pump |
GB2158200A (en) * | 1984-05-04 | 1985-11-06 | Mks Instr Inc | High-speed protective check valve |
-
1993
- 1993-05-26 NL NL9300897A patent/NL9300897A/nl not_active Application Discontinuation
-
1994
- 1994-05-26 EP EP19940201499 patent/EP0628476B1/de not_active Expired - Lifetime
- 1994-05-26 DE DE1994609036 patent/DE69409036T2/de not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB183719A (en) * | 1921-08-15 | 1922-08-03 | Frank Wilber Merritt | Improvements in means for automatically registering a ship's draft |
US3020504A (en) * | 1958-12-24 | 1962-02-06 | Bourns Inc | Pressure transducer |
FR2006829A1 (de) * | 1968-04-24 | 1970-01-02 | Siemens Ag | |
US3765364A (en) * | 1972-07-26 | 1973-10-16 | J Booth | Flush-through port device |
FR2341849A1 (fr) * | 1976-02-23 | 1977-09-16 | Bourdon Ets | Dispositif d'event de securite pour manometre et analogue |
US4289457A (en) * | 1979-07-30 | 1981-09-15 | Porter Carl W | Combination sea valve and deballast pump |
GB2158200A (en) * | 1984-05-04 | 1985-11-06 | Mks Instr Inc | High-speed protective check valve |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2160035A1 (es) * | 1999-02-23 | 2001-10-16 | Univ Cadiz | Procedimiento automatizado para el calculo en tiempo real del peso de la arena transportada en un ganguil o draga autoportante. |
NL1029071C2 (nl) | 2005-05-18 | 2006-11-21 | Sygo B V | Werkwijze en inrichting voor het bepalen van de diepgang van een boot. |
JP2014144776A (ja) * | 2014-05-20 | 2014-08-14 | Mitsubishi Heavy Ind Ltd | 船舶の気泡回収装置 |
Also Published As
Publication number | Publication date |
---|---|
EP0628476B1 (de) | 1998-03-18 |
DE69409036T2 (de) | 1998-09-24 |
DE69409036D1 (de) | 1998-04-23 |
NL9300897A (nl) | 1994-12-16 |
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