EP1668286A1 - Procede et dispositif pour detecter le niveau de seperation des phases liquide et gazeuse dans un reservoir metallique - Google Patents
Procede et dispositif pour detecter le niveau de seperation des phases liquide et gazeuse dans un reservoir metalliqueInfo
- Publication number
- EP1668286A1 EP1668286A1 EP04791454A EP04791454A EP1668286A1 EP 1668286 A1 EP1668286 A1 EP 1668286A1 EP 04791454 A EP04791454 A EP 04791454A EP 04791454 A EP04791454 A EP 04791454A EP 1668286 A1 EP1668286 A1 EP 1668286A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- frame
- level
- temperatures
- temperature
- 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.)
- Withdrawn
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/002—Automated filling apparatus
- F17C5/005—Automated filling apparatus for gas bottles, such as on a continuous belt or on a merry-go-round
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
- G01F23/247—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices for discrete levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
- G01F23/247—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices for discrete levels
- G01F23/248—Constructional details; Mounting of probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/058—Size portable (<30 l)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/01—Mounting arrangements
- F17C2205/0153—Details of mounting arrangements
- F17C2205/018—Supporting feet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/035—Propane butane, e.g. LPG, GPL
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. for liquefied gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0408—Level of content in the vessel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0439—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0486—Indicating or measuring characterised by the location
- F17C2250/0491—Parameters measured at or inside the vessel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0486—Indicating or measuring characterised by the location
- F17C2250/0495—Indicating or measuring characterised by the location the indicated parameter is a converted measured parameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/02—Improving properties related to fluid or fluid transfer
- F17C2260/024—Improving metering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/05—Applications for industrial use
- F17C2270/059—Mass bottling, e.g. merry belts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/07—Applications for household use
- F17C2270/0745—Gas bottles
Definitions
- the present invention relates to a method and a device for detecting the level of separation of the liquid and gaseous phases contained in a metal tank of pressurized gas, in particular in a butane or propane bottle.
- a metal tank of pressurized gas in particular in a butane or propane bottle.
- the level of separation of the liquid and gas phases contained in the butane and propane bottles is generally detected using a cesium cell.
- this solution requires that important safety measures be taken to ensure effective protection of the installations and the personnel against the gamma rays emitted by the cell. Carrying out the detection of the separation level in an explosive area further increases the precautions to be taken.
- Another solution has been proposed recently for detecting the level of separation of the liquid and gaseous phases. .
- the present invention proposes to overcome the drawbacks of the aforementioned solutions and, to do this, it relates to a method for detecting the level of separation of the liquid and gaseous phases contained in a metal reservoir of pressurized gas, in particular in a bottle of butane or propane, this process being characterized in that it comprises the steps consisting in: measuring the temperature of the wall of the tank in two locations located one at the maximum at the level of the minimum admissible separation level and the other at least at the height of the maximum authorized level, the measurement being carried out in.
- the method according to the invention makes it possible to detect this last. Since this temperature difference is only detectable for a short period of time, the method according to the invention must obviously be implemented within a limited time after filling. Preferably, the temperature measurement is carried out within a maximum of 30 minutes after filling the tank. Beyond this period, the temperatures of the parts of the tank situated on either side of the separation level become uniform again. According to a first embodiment of the method according to the invention, the temperature is measured using two infrared pyrometers.
- the measurement of the temperatures can however be carried out using a single infrared pyrometer movable vertically.
- the method according to this variant has the advantage of being easy to implement.
- the method according to the invention may comprise a step consisting in spraying water vapor onto at least the part of the tank at the level of which the temperature measurements are carried out, the projection of the vapor being ensured before carrying out the temperature measurements. Thanks to this vapor projection, the difference between the temperatures of the liquid and gaseous phases can be more easily detected, which makes it possible to locate more precisely the level of separation of these two phases.
- the method according to the invention is preferably implemented in an installation for filling gas cylinders, the temperature measurement being carried out at a fixed station in which the gas bottles are brought one after the other.
- the present invention also relates to a device for detecting the level of separation of the liquid and gaseous phases contained in a metal tank of pressurized gas, in particular in a butane or propane bottle, this device being characterized in that it comprises a frame carrying means for measuring the temperature of the tank at two locations, one located at the maximum at the level of the minimum admissible separation level and the other at the minimum at the height of the maximum authorized level, and processing means for comparing the temperatures measured at the two locations in order to extract the tank from the commercial circuit when the temperatures are identical.
- the frame is mounted on a gantry on which it is vertically movable between an extreme high position in which a tank is in place in front of the temperature measurement means and an extreme low position in which no tank is in front of said means temperature measurement.
- the frame can advantageously include at least one shoe resting on the upper part of the tank when it is in its extreme high position and hang under the gantry when it is in its extreme low position.
- the temperature measurement means are automatically at the desired height so that a possible temperature difference between the parts of the tank which are situated on either side of the level of separation of the liquid and gaseous phases can be detected under optimal conditions.
- the gantry can advantageously overlap a conveyor associated with an installation for filling gas bottles and capable of driving the bottles one after the other.
- the filling installation can operate at a high rate since it can process up to 1200 bottles per hour.
- the bottles raise the shoe and move the frame from its extreme low position to its extreme high position when they come under the gantry.
- the temperature measurement means comprise two infrared pyrometers directed towards the side wall of the tank and fixed on the frame so as to measure the temperatures at the two locations.
- the temperature measurement means comprise a single infrared pyrometer directed towards the side wall of the tank and movable vertically on the frame so as to measure the temperatures at the two locations.
- the frame can advantageously be provided with a carriage on which the temperature measurement means are mounted and which is provided with a contact element intended to bear against the side wall of a reservoir under the action of an elastic member when the reservoir is in front of the measuring means.
- the carriage is carried by an assembly mounted on the frame and on which it is movable perpendicular to the trajectory of the containers, its movement being ensured against the action of the elastic member on the tanks arriving in front of the contact element and exerting on it a push to follow their trajectory.
- the temperature measuring means can be easily maintained at a predetermined distance from the tank, which allows them to provide precise results.
- the support can advantageously be movable parallel to the trajectory of the bottles, between a first position from which temperature measurements begin and a second position in which said measurements end. This characteristic makes it possible to obtain precise temperature measurements when the tanks circulate continuously in front of the measuring means. The response time of the latter has no influence on the measurements since they can be carried out several times while the tanks are moving.
- the support comprises a drive stud movable perpendicular to the trajectory of the reservoirs, between an advanced position in which it is placed in front of a reservoir, at the start of the measurements, and a retracted position in which it is distant from the reservoir, the end of said measures.
- the movement of the support during the execution of the measurements can thus be ensured by the tanks during their movement, which makes it possible to simplify the structure of the detection device.
- a jack is provided between the frame and the support to return the latter to its first position when the measurements are completed. Thanks to this jack, the detection device can operate automatically and without dead time.
- the detection device may also comprise means for projecting water vapor onto at least the part of the tanks at the level of which the temperature measurements are carried out, the projection means being actuated before the realization of the temperature measurements. Thanks to the sprayed water vapor, the temperature differences between the liquid and gaseous phases can be more easily detected, which allows a more precise localization of the level of separation of these two phases.
- Figure 1 is a side view of a detection device according to the invention, mounted on a gantry straddling the conveyor of an installation for filling gas bottles, this device being shown while its frame is in its extreme low position;
- Figure 2 is a view similar to Figure 1 but showing the device while its frame is in its upper extreme position;
- Figure 3 is a schematic sectional view along line III-III of Figure 2.
- Figure 4 is a sectional view similar to that of Figure 3, but showing another detection device according to one invention
- Figure 5 is a side view of the device visible in Figure 4, the support of the measuring means being in its first position
- Figure 6 is a side view similar to that of Figure 5 but in which the support of the measuring means is in its second position
- - Figure 7 is a sectional view similar to that of Figure 4, but in which the measuring means comprise a single infrared pyrometer.
- the device shown in Figures 1 to 3 was developed to detect the level of separation of the liquid and gas phases contained in butane or propane bottles. It could however be used to find out the liquid level in other metal tanks containing other pressurized gases.
- the detection device comprises a frame 1 mounted on a gantry 2 overlapping the conveyor 3 of an installation designed to fill gas bottles 4.
- the frame 1 comprises a vertical support 5 on which two infrared pyrometers 6 are fixed horizontally one above each other.
- the pyrometers are not necessarily arranged along the same vertical; they could indeed be located on an oblique line, in particular to facilitate maintenance operations.
- the frame 1 also comprises a frame 7 located above the conveyor 3 of the filling installation and connected to the support 5 by a horizontal arm 8 visible in FIG. 3.
- the side walls of the frame 7 extend parallel to the conveyor 3 and are each connected by two parallel connecting rods 9 to a structure 10 fixed to the upper part of the gantry 2. Thanks to this particular mounting, the frame 1 is movable vertically between an extreme low position visible in the figure
- the underside of the chassis 7 carries two pads 11 extending parallel to the conveyor 3 and spaced from each other so as to be able to receive the tap of the bottles 4 between them.
- the underside of the pads 11 tilts towards the bottom, from the front edge of these to a flat intermediate part intended to cooperate with the dome of the bottles 4. It then tilts upwards, from this intermediate part to the rear edge of the pads.
- the lower end of the front edge of the pads 11 is slightly higher than the base of the dome of the bottles.
- a bottle 4 when driven in the direction of arrow F and advances under the gantry 2, its dome comes into contact with the pads 11 and lifts the frame 1.
- the frame arrives in its extreme high position when the bottle 4 is in front of the pyrometers 6, under the gantry 2.
- the conveyor 3 can possibly be immobilized when the frame is in its extreme high position.
- the two pyrometers 6 are directed towards the side wall of the bottle, the lower pyrometer normally being located below the minimum admissible level of separation of the liquid and gaseous phases contained in the bottle, while the upper pyrometer is normally located at a height less than or equal to the maximum separation level allowed.
- the pyrometers 6 are used to determine the temperatures of the parts of the wall of the bottle which are located in front of them and can be distant from each other by a distance of the order of 5 mm to 10 cm.
- the bottle is filled with liquefied gas. When it enters the bottle, it partially expands and vaporizes, which cools the incident liquid and gas phases and creates a temperature difference between these two phases. As the heat of the liquid phase diffuses more quickly towards the wall of the bottle than the heat of the gas phase, a temperature gradient is established on either side of the level of separation of the two phases. It is therefore this temperature gradient which is determined using the two pyrometers 6.
- the level of separation of the liquid and gas phases is located at an intermediate height between the horizontal axes of the pyrometers.
- the bottle is therefore properly filled and can be put on the market.
- the level of separation of the liquid and gaseous phases is situated outside the interval delimited by the horizontal axes of the pyrometers. In this case, the bottle is not filled enough or is too full and must be eliminated from the commercial circuit.
- the determination of the temperatures of the parts of the wall of the bottle which are in front of the pyrometers must of course be carried out very shortly after the filling of the bottle.
- the detection device also comprises processing means, not shown, for comparing the temperatures determined by the pyrometers and deciding whether the bottle which has just been filled can be directed into the commercial circuit or be eliminated therefrom. It will be recalled that the bottle is accepted when a temperature difference is detected by the pyrometers and refused when the temperatures determined by the latter are identical.
- the conveyor can work step by step and stop when a bottle reaches the gantry. However, it can operate continuously, the temperature measurements being carried out while the bottles are circulating in front of the pyrometers.
- a shock absorber device can be provided to allow the frame to come smoothly into its extreme low position when the bottles 4 move away from the gantry 2, once the temperature measurements have been made.
- the processing means of the detection device can advantageously include an automatic device for controlling the evacuation of bottles which cannot be placed on the market. If necessary, this machine could transmit information outside the explosive area via optical fibers to a production supervision station. Means could also be provided for automatically adjusting the height of the pyrometers on the frame, depending the temperature of the liquid phase contained in the bottles, in order to take account of the variations in height of the minimum admissible and maximum authorized separation levels, these variations depending on the temperature and the gas contained in the bottles.
- the detection device which has just been described also comprises means 12 for projecting water vapor onto the bottles 4, at least on their part at the level of which the temperature measurements are made.
- the means 12 are located upstream of the gantry 2 and include a steam generator 13 located near the conveyor 3, and at least one nozzle 14 connected to the generator 13 via a pipe 15 and oriented so as to project the water vapor the bottles circulating in front of it. Thanks to this vapor projection, the difference between the temperatures of the liquid and gaseous phases can be detected more easily, and the measurements provided by the pyrometers 6 can be more precise.
- the detection device visible in FIGS. 4 to 6 has great similarities with that which has just been described with reference to FIGS.
- the device shown in Figures 4 to 6 differs from the device visible in Figures 1 to 3 in that the frame 1 comprises a carriage 16 on which are mounted the two infrared pyrometers 6 and which is provided with a bar horizontal 17 extending parallel to the trajectory of the bottles 4.
- the carriage 16 is carried by an assembly 18 on which it is displaceable perpendicular to the trajectory of the bottles.
- a spring 19 extending parallel to the pyrometers 6 and compressed between a bracket 20 of the assembly 18 and the carriage 16 biases the latter towards the trajectory of the bottles, in the direction of the arrow FI.
- the assembly 18 is movable on the frame 1, parallel to the trajectory of the bottles, between a first position (visible in Figure 5) from which the measurements begin. temperature, and a second position (visible in FIG. 6) in which said measurements end.
- the carriage 16 comprises a drive stud 21 movable perpendicular to the trajectory of the bottles, between an advanced position (visible in FIG.
- a jack 22 carried by the carriage 16 is provided to move the pad 21 between its advanced and retracted positions as a function of the position of the bottles on the conveyor 3.
- the pad 21 forces the 'assembly 18 to move with it in the direction of arrow F2 in Figure 5, the assembly 18 of course driving the carriage 16 with him.
- the pyrometers 6 thus remain longer in front of the bottle situated under the gantry, which allows the execution of several successive measurements and consequently the obtaining of a more precise result.
- a jack 23 mounted between the frame 1 and the assembly 18 is provided to return the latter to its first position when the measurements are completed.
- the assembly 18, which is movable parallel to the trajectory of the bottles 4 is in reality carried by the support 5 of the frame.
- the support 5 is itself movable vertically relative to the horizontal arm 8 of the frame 1 under the control of a jack not shown. Thanks to this particular arrangement, it is therefore possible to carry out the temperature measurements at predetermined locations on the side wall, the choice of these locations being chosen for example according to the size of the bottles.
- the detection device visible in FIG. 7 has great similarities with that which has just been described with reference to FIGS. 4 to 6.
- the device shown in Figure 7 differs from the device visible in Figures 4 to 6 in that the carriage 16 includes a single infrared pyrometer 6.
- This pyrometer 6 can be moved vertically on the carriage 16 under the control of a jack 24 so that it can measure at the desired locations the temperature of the bottle located in front of it. It will be recalled for all practical purposes that, again, the temperature measurements are carried out in two locations, one located at the maximum at the height of the minimum admissible separation level and the other at the minimum at the height of the maximum authorized level.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0311594A FR2860573B1 (fr) | 2003-10-03 | 2003-10-03 | Procede et dispositif pour detecter le niveau de separation des phases liquide et gazeuse dans un reservoir metallique |
PCT/FR2004/002490 WO2005033576A1 (fr) | 2003-10-03 | 2004-10-01 | Procede et dispositif pour detecter le niveau de seperation des phases liquide et gazeuse dans un reservoir metallique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1668286A1 true EP1668286A1 (fr) | 2006-06-14 |
Family
ID=34307391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04791454A Withdrawn EP1668286A1 (fr) | 2003-10-03 | 2004-10-01 | Procede et dispositif pour detecter le niveau de seperation des phases liquide et gazeuse dans un reservoir metallique |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1668286A1 (fr) |
FR (1) | FR2860573B1 (fr) |
WO (1) | WO2005033576A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2045586A1 (fr) * | 2007-10-01 | 2009-04-08 | Siemens Milltronics Process Instruments Inc. | Procédé et système de mesure du niveau de remplissage d'un matériel |
CN102353476B (zh) * | 2011-06-03 | 2013-02-13 | 华中科技大学 | 水风逆流空气采样及测温装置 |
GB2517458A (en) * | 2013-08-21 | 2015-02-25 | George Edwards | Measurement device, measurement system, canister and measurement method |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB917988A (en) * | 1960-12-23 | 1963-02-13 | George Haim | Method and means for determining the level of a liquid in a container |
FR1334715A (fr) * | 1961-09-28 | 1963-08-09 | Shell Int Research | Appareil pour le remplissage automatique de récipients |
US3151468A (en) * | 1962-04-26 | 1964-10-06 | Cryogenics Inc | Liquid level control for cold traps |
FR2306935A1 (fr) * | 1975-04-10 | 1976-11-05 | Gaz De France | Dispositif electronique pour commander et controler le remplissage d'un reservoir de gaz liquefie a basse temperature |
CA1169947A (fr) * | 1981-08-20 | 1984-06-26 | Howard R. Braun | Regulateur de niveau d'azote en phase liquide |
SE439768B (sv) * | 1982-03-10 | 1985-07-01 | Primus Sievert Ab | Anordning for automatiskt begrensad tillforsel av ett flode av vetska |
DE3421803A1 (de) * | 1984-06-12 | 1985-12-12 | Messer Griesheim Gmbh, 6000 Frankfurt | Vorrichtung zur ermittlung des fuellstandes in kryobehaeltern |
FR2677735B1 (fr) * | 1991-06-17 | 1995-08-25 | Totalgaz Cie Fse | Dispositif de commande d'emplissage, et d'arret automatique a un niveau determine, de reservoirs de gaz de petrole liquefie. |
US5209115A (en) * | 1991-09-11 | 1993-05-11 | Intelsat | Liquid detector for thin-walled tanks operating in zero gravity |
FR2681934B1 (fr) * | 1991-09-27 | 1993-12-31 | Automation Mecanique Provencale | Procede et installation de remplissage de bouteilles de gaz liquide et de controle desdites bouteilles apres remplissage. |
DE29606594U1 (de) * | 1996-04-11 | 1996-06-05 | Siemens AG, 80333 München | Überwachungssystem für Flüssiggasbehälter, Druckgasbehälter oder Flüssiggas- bzw. Druckgasrohrleitungen |
FR2793555B3 (fr) * | 1999-05-11 | 2001-07-13 | Cybernetix | Procede et installation de mesure du niveau de remplissage d'un reservoir ou d'une bouteille opaque |
-
2003
- 2003-10-03 FR FR0311594A patent/FR2860573B1/fr not_active Expired - Fee Related
-
2004
- 2004-10-01 WO PCT/FR2004/002490 patent/WO2005033576A1/fr not_active Application Discontinuation
- 2004-10-01 EP EP04791454A patent/EP1668286A1/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2005033576A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2005033576A1 (fr) | 2005-04-14 |
FR2860573B1 (fr) | 2006-01-21 |
FR2860573A1 (fr) | 2005-04-08 |
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