WO2002012841A1 - Appareil pour determiner le contenu en fluide d'un contenant - Google Patents

Appareil pour determiner le contenu en fluide d'un contenant Download PDF

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Publication number
WO2002012841A1
WO2002012841A1 PCT/GB2001/003519 GB0103519W WO0212841A1 WO 2002012841 A1 WO2002012841 A1 WO 2002012841A1 GB 0103519 W GB0103519 W GB 0103519W WO 0212841 A1 WO0212841 A1 WO 0212841A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch
elements
container
receiver
warning
Prior art date
Application number
PCT/GB2001/003519
Other languages
English (en)
Inventor
Ian Rowlinson
Original Assignee
Gasmat Espana Sl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gasmat Espana Sl filed Critical Gasmat Espana Sl
Priority to AU2001278583A priority Critical patent/AU2001278583A1/en
Priority to EP01956659A priority patent/EP1319172A1/fr
Priority to CA002418668A priority patent/CA2418668A1/fr
Publication of WO2002012841A1 publication Critical patent/WO2002012841A1/fr

Links

Classifications

    • 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
    • F17C13/023—Special adaptations of indicating, measuring, or monitoring equipment having the mass as the parameter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G17/00—Apparatus for or methods of weighing material of special form or property
    • G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
    • 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
    • F17C2250/03—Control means
    • F17C2250/034—Control means using wireless transmissions
    • 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
    • F17C2250/03—Control means
    • F17C2250/036—Control means using alarms
    • 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
    • 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
    • F17C2250/0421—Mass or weight of the content of the vessel
    • 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
    • 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
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • 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
    • 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 an apparatus for use in determining the fluid contents of a container. It further relates to an apparatus which can trigger an alarm signal when the weight of a fluid container falls below a predetermined value.
  • an apparatus for establishing when the quantity of fluid remaining in a container falls below an adjustable predetermined level comprising:
  • a base housing elements adapted to deflect proportionally to the weight applied to them, and
  • a lid adapted to sit on the elements in the base and for receiving or otherwise supporting the container thereon
  • the elements are arranged to operate a switch when deflection of the elements reaches or falls below a predetermined value, the switch enabling a circuit comprising a warning or alarm system.
  • the elements preferably comprise one or more levers operatively linked together.
  • the levers are operable by tabs extending downwardly from the lid.
  • the switch is preferably mounted directly on the elements, the direct linkage reducing the chance and size of an error.
  • the switch is preferably pivotally mounted on one of the elements.
  • the switch is connected to the element by means of a tensioning member which biases the switch to return to its normal position.
  • the pivotal mounting of the switch prevents damage when the force urging the switch into a closed position becomes too great.
  • the tensioning member ensures that the switch returns to a rest position when the force is removed.
  • the circuit is preferably enabled by contact of the switch with a switch receiver.
  • the position of the switch receiver is preferably adjustable. Adjustment is advantageously by means of a screw-threaded adjustment means acting on the switch receiver, the screw-threaded adjustment providing small incremental changes to be made and consequentially, high sensitivity.
  • a tensioning member advantageously links the adjustment means to the switch receiver to take out any play in the upward or downward motion of the switch receiver.
  • the apparatus can additionally comprise a restraining member to prevent rotation of the switch receiver on turning of the adjustment means.
  • the restraining member is preferably attached to the upper part of the apparatus to aid assembly of the apparatus and give increased repeatability of measurement.
  • the warning system preferably comprises one or more visual displays, such as light emitting diodes located on the apparatus.
  • the warning system can also comprise an audio/visual alarm remote from the apparatus.
  • the linkage between the remote alarm and the apparatus can be via a wire or alternatively electromagnetic radiation.
  • Figure 1 is a perspective view of a platen
  • Figure 2 is a perspective view of an audio visual indicator
  • Figure 3 is a perspective view of a radio frequency (RF) receiver to receive a signal from the transmitter of Figure 4;
  • RF radio frequency
  • FIG. 4 is a perspective view of a radio frequency (RF) transmitter
  • Figure 5 is a perspective view of the platen of Figure 1 with the top press removed;
  • FIG. 6 is a detailed view of the switching system
  • Figure 7 is a perspective view of levers and a switch arm, with the other components removed.
  • FIGS 8 to 10 are perspective views of the switch lever and switch arm with the other components removed.
  • references to a fluid should be taken to include not simply liquids, but also particulate solids which can be caused to flow upon application of a force.
  • Figure 1 shows a platen, generally referenced 10, comprising a base pressing 11 and a top pressing 12 both formed from steel and having a paint finish.
  • a rubber mat 13 is bonded by means of an adhesive to the upper surface of the top pressing 12.
  • the top pressing 12 and the base pressing 11 of the platen 10 are substantially circular, the platen 10 however comprising an extension 14 to house control and display features.
  • the control and display features comprise two warning light emitting diodes (LED) 15 and 16 and an on/off switch 17.
  • the display features further comprise an adjuster knob 18 for use in calibrating the apparatus.
  • a remote audio/visual indicator 20 as illustrated in Figure 2 can be added in addition to the warning LED's 15, 16 to indicate when the pre-set level of liquid has been reached in the container resting on the platen 10.
  • Figures 3 and 4 illustrate components of a remote audio visual indicator for use when the container is being stored in a position not normally accessed by people or personnel responsible for maintenance of the container.
  • An audio/visual receiver 30 is contained within a housing and is powered from the standard mains supply via an A/C transformer adapter.
  • the transmitter 40 is connected to the platen 10 by a short wire from which it receives both the signal and its power supply. On receipt of the signal from the transmitter 40 by the receiver 30, the receiver 30 emits an audible and visual warning of the content level in the container.
  • the housing for the receiver 30 is typically 65mm wide, 145mm in length and 30mm in depth.
  • a typical material from which the outer casing is formed is polyacrylonitrile butadiene styrene (ABS).
  • a typical size for the transmitter 40 is 36mm in width, 63 mm in length and 15mm in depth.
  • the housing for the transmitter 40 is typically also formed from ABS.
  • FIGS 5 and 6 show the internal details of the platen 10.
  • Four legs 50 are attached and extend downwardly from the top pressing 12 (not illustrated).
  • the base pressing 11 and the top pressing 12 are held together by an assembly spring 51.
  • the assembly spring 51 acts to hold the base pressing 11 and the top pressing 12 together and maintains a pre-set tension between them.
  • the base pressing 11 further houses a battery case 52 which itself houses the 9-volt batteries used to power the electronic circuitry of the platen 10.
  • a N-shaped primary lever 54 is supported at N-shaped slots 55A,B formed in the base pressing 11 and in use supports the top pressing 12.
  • the top pressing 12 is further supported by two secondary levers 56A,B. These are themselves supported at a first end in N-shaped slots 57A,B made within the base pressing 11 and at a second end by slots within the primary lever 54.
  • Each arm of the primary lever 54 and each of the secondary levers 56A,B is located within a N-shaped slot formed in the legs 50.
  • the primary lever 54 further comprises a substantially triangular plate 58 at the apex formed by its two arms. The triangular plate 58 retains the main spring 59 which biases the primary lever 54 in an upward direction.
  • a switch lever 60 is pivoted about pivot point 61 and houses on its outer surface a switch 62.
  • a switch lever spring 63 is attached at a first end to the triangular plate 58 and at a second end to a retaining tab 64 located on the underside of the switch lever 60 and which extends inwardly underneath the primary lever 54.
  • the platen 10 further comprises an on/off switch 17.
  • a switch arm 65 is screw threadedly connected to adjuster knob 18 and is held in spaced relationship from adjuster knob 18 by switch-arm tensioner 66.
  • the switch-arm tensioner 66 consists of a spring which acts to maintain the separation between the adjuster knob 18 and the switch arm 65.
  • a switch arm guide 67 which is welded to the top pressing 12 is located within a hole in the switch arm 65 and prevents the switch arm 65 from rotating when the adjuster knob 18 is actuated.
  • a sigmoid metal strip 69 is located at a first end to switch 62. The second end of the strip 69 extends beneath the switch arm 65.
  • an empty bottle is placed on the rubber mat 13 on the top pressing 12 of the platen 10.
  • the weight of the bottle is transferred through the four legs 50 extending from the top pressing 12 to the primary and secondary levers 54, 56A,B.
  • a primary lever 54 and the two secondary levers 56A,B are deflected in a downward direction, the primary lever 54 acting against the main spring 59.
  • the adjuster knob 18 is rotated and, acting through the switch arm tensioner 66 causes either upward or downward motion of the switch arm 65. Rotation of the adjuster knob 18 is continued until the switch arm 65 contacts the strip 69.
  • the contact between the switch arm 65 and the strip 69 causes an electric circuit to be formed actuating the warning LED's 15,16. If desired, and to conserve energy the system may now be switched off by means of the on/off switch 17.
  • the empty bottle is removed and replaced by a full bottle on the rubber mat 13 of the platen 10 and the on/off switch 17 again actuated.
  • the primary lever 54 is depressed further than previously by the empty bottle and the contact between the strip 69 and the switch arm 65 is broken, with the result that the warning LED's 15, 16 are not activated.
  • the bottle becomes lighter and the tension from the main spring 59 causes the primary lever 54 to rise until eventually contact between the strip 69 and the switch arm 65 is re-established, activating the LED's 15, 16. An operator is thus alerted to the fact that the bottle needs to be changed for a fresh bottle. Where bottles used for each fresh batch of fluid are identical, no further calibration of the apparatus is required and a new bottle may simply be inserted.
  • the apparatus as described herein thus provides for an accurate and repeatable indication as to when a container is empty. It can also be used to indicate when a container is almost empty. In this usage, when the near empty condition is indicated, the container can be changed immediately which minimises the time when supply of fluid is not available.
  • This mode of action can be set quite simply, wherein the above method is used to determine the contact point when an empty bottle is present.
  • the switch arm 65 can be depressed by means of the adjuster knob 18 to bring it into closer proximity with the strip 69.
  • the strip 69 rises as a result of the bottle being emptied, contact between the strip 69 and the switch arm 65 takes place before the bottle is empty.
  • the top pressing can rest on a disc or other member held in spaced relationship to the top pressing, the raising and lowering of which causes an electric circuit to be closed or opened to activate or deactivate a warning system.
  • the disc or other member can be supported on a hydraulic system to cushion it and provide a measured and consistent response to pressure being applied to the top pressing.
  • a hydraulic system may find particular use where the apparatus is to be used to weigh large containers such as road tankers or intermediate bulk containers.
  • the apparatus can be used therefore to monitor delivery of a load, and is particularly useful where the load must be isolated from the environment, as monitoring of the removal of fluid from the container can be carried out without the fluid coming into contact with the surrounding atmosphere.
  • the measurement of a mass is known to be more accurate and less prone to error than measurement of a volume.
  • the apparatus can also find use, for example, in the healthcare industry in which the administration of a medicament, for example, via an aerosol can be closely monitored.
  • the adjustment means for the switch receiver may be calibrated so that a given number of turns is known to correspond to a certain weight. This would, for example, obviate the need for re-calibration where a particular fluid is supplied in two different containers, for example, either plastic or glass having known weight difference. Such a facility would also allow a container to be removed when only a certain quantity of fluid is remaining therein where a known quantum of the fluid content needs to be removed. In this case, the circuit which normally actuates the warning or alarm system can also be used to switch off a pump removing fluid from the container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Closures For Containers (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Emergency Alarm Devices (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un appareil (10) servant à déterminer lorsque le niveau de fluide restant dans un contenant tombe au-dessous d'un seuil déterminé variable. Cet appareil comporte une base (11), dans laquelle sont logés des éléments conçus pour la déflexion proportionnelle au poids exercé sur eux. Un couvercle (12), conçu pour être placé sur les éléments, sert de support au contenant. Les éléments sont disposés pour agir sur une commutation (62), lorsque leur déflexion atteint une valeur définie ou est inférieure à celle-ci, déclenchant ainsi un système d'avertissement ou d'alarme. Ce système d'avertissement, qui comporte une ou plusieurs diodes électroluminescentes (15, 16) ou une alarme audible/visuelle (20), peut soit être intégré dans l'appareil, soit se trouver à distance de celui-ci. Les éléments comprennent un certain nombre de leviers (54), reliés entre eux de manière fonctionnelle, qui réagissent en fonction du poids du contenant sur le couvercle (12).
PCT/GB2001/003519 2000-08-05 2001-08-06 Appareil pour determiner le contenu en fluide d'un contenant WO2002012841A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2001278583A AU2001278583A1 (en) 2000-08-05 2001-08-06 An apparatus for determining the fluid content of a container
EP01956659A EP1319172A1 (fr) 2000-08-05 2001-08-06 Appareil pour determiner le contenu en fluide d'un contenant
CA002418668A CA2418668A1 (fr) 2000-08-05 2001-08-06 Appareil pour determiner le contenu en fluide d'un contenant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0019163.5 2000-08-05
GB0019163A GB0019163D0 (en) 2000-08-05 2000-08-05 Apparatus for determining the fluid content of a container

Publications (1)

Publication Number Publication Date
WO2002012841A1 true WO2002012841A1 (fr) 2002-02-14

Family

ID=9896980

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/003519 WO2002012841A1 (fr) 2000-08-05 2001-08-06 Appareil pour determiner le contenu en fluide d'un contenant

Country Status (5)

Country Link
EP (1) EP1319172A1 (fr)
AU (1) AU2001278583A1 (fr)
CA (1) CA2418668A1 (fr)
GB (1) GB0019163D0 (fr)
WO (1) WO2002012841A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524617A (en) * 1983-10-06 1985-06-25 The Cooper Thermometer Company Fuel gauge for propane tank
BE905866A (fr) * 1986-12-04 1987-04-01 Mesguich Francis Procede pour verifier la quantite d'un produit contenu dans un recipient et dispositif pour la mise en oeuvre dudit procede.
GB2237395A (en) * 1989-10-13 1991-05-01 Polar Refrigeration Services Weighing device
WO2001009572A1 (fr) * 1999-07-29 2001-02-08 Al-Modiny, Leila, Iman, Mia, Khalid Balance pour recipient a gaz

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524617A (en) * 1983-10-06 1985-06-25 The Cooper Thermometer Company Fuel gauge for propane tank
BE905866A (fr) * 1986-12-04 1987-04-01 Mesguich Francis Procede pour verifier la quantite d'un produit contenu dans un recipient et dispositif pour la mise en oeuvre dudit procede.
GB2237395A (en) * 1989-10-13 1991-05-01 Polar Refrigeration Services Weighing device
WO2001009572A1 (fr) * 1999-07-29 2001-02-08 Al-Modiny, Leila, Iman, Mia, Khalid Balance pour recipient a gaz

Also Published As

Publication number Publication date
GB0019163D0 (en) 2000-09-27
AU2001278583A1 (en) 2002-02-18
CA2418668A1 (fr) 2002-02-14
EP1319172A1 (fr) 2003-06-18

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