EP0805121A1 - Système de sécurité pour camions-citernes - Google Patents

Système de sécurité pour camions-citernes Download PDF

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Publication number
EP0805121A1
EP0805121A1 EP97850071A EP97850071A EP0805121A1 EP 0805121 A1 EP0805121 A1 EP 0805121A1 EP 97850071 A EP97850071 A EP 97850071A EP 97850071 A EP97850071 A EP 97850071A EP 0805121 A1 EP0805121 A1 EP 0805121A1
Authority
EP
European Patent Office
Prior art keywords
depot
valve
control device
lorry
compartment
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
Application number
EP97850071A
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German (de)
English (en)
Other versions
EP0805121B1 (fr
Inventor
Hans Albert Stefan Lossien
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP0805121A1 publication Critical patent/EP0805121A1/fr
Application granted granted Critical
Publication of EP0805121B1 publication Critical patent/EP0805121B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/32—Arrangements of safety or warning devices; Means for preventing unauthorised delivery of liquid

Definitions

  • tank lorry drivers have applied completely visual methods, i.e. they used a key-operated switch and, optionally, a product selector for the starting of pumps and valves. The filled quantity was then checked by the driver placing himself on top of the tank lorry with the manhole covers open. When the individual compartment was almost full, the driver had to climb down to the ground and stop the filling operation. This system is complicated and may cause accidents caused by, for example, slipping, explosion etc.
  • the various compartments of the tank lorries have then been equipped with an overcharging protection means in the form of a so-called thermistor, a resistor sensitive to temperature.
  • At the depot there was an amplifier that converted the signal from the thermistor to a relay signal for closing a solenoid valve at the depot.
  • This system functions if all components included are new and correctly adjusted. Problems may, however, arise after some time, e.g. a mechanical fault in the solenoid valve at the depot. As a consequence, the product continues to flow into the tank lorry although the electric signal to the solenoid valve has disappeared.
  • an unloading computer at the depot has a database with information on compartment volumes in each tank lorry.
  • the driver arrives at the depot, he enters a lorry code to give the unloading computer information on which lorry is involved.
  • the unloading computer obtains an identification.
  • the driver selects the product and indicates which compartment he wants to load.
  • a thermistor plug connected to the computer must be connected to the selected compartment.
  • This increased system confers the advantage that the unloaded quantity to the individual compartment cannot exceed the space of the compartment if the database is correct.
  • the unloading system loads the desired volume.
  • the system has a time delay which enables filling of the next compartment only after a certain time of waiting, thereby achieving a certain amount of safety that the driver has moved the thermistor plug to the next compartment and opened this.
  • An object of the present invention therefore is to further increase the safety and reduce the risk of malfunction and overflowing when unloading liquids to different types of lorries.
  • the invention is based on the knowledge that additional measures of precaution are necessary to counteract certain types of malfunction or wrong operation on the part of the staff or owing to deficiencies in the unloading computer or its database.
  • the invention is based on a known safety system, which comprises a control device at the depot for controlling the loading procedure and the opening and closing of a product valve in a connection conduit from the depot to an inlet conduit included in the tank lorry; a liquid-sensing transducer connected to said control device and arranged at the top in the individual load compartment of the tank lorry for interrupting the liquid supply to the individual load compartment for preventing overflow, when liquid is detected; a liquid level transducer connected to the control device of the depot at a lower level in the individual load compartment for interrupting the liquid supply when filling of this compartment to a predetermined maximum level therein has taken place; an inlet valve of the individual compartment, said inlet valve being connected to the control device of the depot and being activatable by said control device; an operating valve included in the inlet conduit; and a connection transducer connected to the control device of the depot and adapted to check whether the connection conduit is connected to the inlet conduit before the operating valve thereof, or not.
  • this known safety system is to be supplemented, according to the invention, with a sensor included in the connection of the control device to the inlet valve and adapted to sense the setting position of the inlet valve; a further sensor connected in series with said sensor and adapted to sense the setting position of the operating valve included in the inlet conduit; a control circuit included in the control device of the depot and adapted to prevent opening of the product valve or to close the same if one or both sensors indicate the closed position of the associated valve; a safety circuit which is included in the electric system of the tank lorry and is connected to the control device and is adapted to check that the engine of the lorry is switched off and to prevent starting of the engine of the lorry when loading is to take place.
  • the invention thus is based on the knowledge that an increase of the safety is required by sensing not only of both the setting position of the inlet valve included in the inlet conduit and the setting position of the operating valve included in the inlet conduit, but also of the fact that the engine of the tank lorry is switched off and cannot be started by means of its starting motor.
  • This information is then used in the control device of the unloading depot, thereby preventing a product valve from being opened if either of or both of these monitored valves is/are in closed condition or if the engine is running or if electric connection could be established between the ignition key switch and the starting motor.
  • the safety system has besides been increased with an identification device, which comprises an identification circuit on the tank lorry and a sensing circuit in the unloading device of the depot.
  • an identification device which comprises an identification circuit on the tank lorry and a sensing circuit in the unloading device of the depot.
  • the Figure illustrates only one compartment 10 in a tank lorry.
  • the components belonging to the individual compartment are therefore multiplied by the number of compartments in the tank lorry involved.
  • the compartment has a manhole cover (not shown) and a venting tube.
  • an inlet valve 11 At the lower end of the compartment there is an inlet valve 11 at the end of an inlet pipe 12.
  • the inlet pipe is part of a branch conduit, the various branches of which are connected to different compartments in the tank lorry.
  • the inlet valve 11 is pressure-controlled, in the case shown by compressed air via a conduit 13.
  • the conduit 13 is connectible, with the aid of connecting means 14 at the end of a supply conduit 15, to an external compressed-air source at the tank depot.
  • a control valve 16 is arranged in the conduit 15 for controlling the supply of compressed air.
  • an operating valve 17 is arranged, which in the shown embodiment is manual but which could also be compressed-air operated.
  • a limit transducer 18 is arranged to sense whether the valve is closed or open.
  • this limit transducer is connected in series on the one hand with a pressure gauge 19 sensing the pressure in the conduit 13 and, on the other hand, a lowermost level indicator 20 which is in the form of a thermistor or capacitive transducer and is arranged in the upper part of the compartment 10.
  • a further level indicator 21 which also is in the form of a thermistor or capacitive transducer.
  • the latter level indicator 21 is connected in series with a further limit transducer 22 arranged on the operating valve 17.
  • a safety circuit 23 is included in the tank lorry.
  • This device comprises a pressure-controlled switch, which is connected to the electric system of the tank lorry to prevent starting of the engine by means of the ignition key switch 24 of the tank lorry and its starting motor 25 and for preventing the loading operation from being begun if the motor should be running.
  • the pressure-controlled switch included in the safety circuit 23 is therefore, via a compressed-air conduit 26, a connecting means 27, a supply conduit 28 and a control valve 29 connected to an external compressed-air source at the depot.
  • the safety circuit 23 also includes transducers, which are connected to a signal line 30 and which are arranged to indicate whether the engine of the lorry is switched off and also indicate that the pressure-controlled switch has opened the electric circuit between the ignition key switch 24 and the starting motor 25.
  • the signal line 30 and signal lines 31 and 32 from the limit transducers 18, 22 are each connected to a pole in a contact means 33. This is in turn connectible to corresponding contact means 34 at the unloading position of the depot, such that the various signals can be conducted to a control device or circuit 35 which is arranged at the depot and is in the form of a PLC. If necessary, amplifiers 36 may have been arranged in the connection lines between the transducers 18 and 22 and the control circuit 35.
  • an inductive transducer 39 or some other type of transducer is arranged in prior-art manner. This transducer is connected to the control circuit 35 via a signal line 40. The control circuit 35 is in turn connected to a master computer 41.
  • a prior-art tank lorry has thus been modified by the lowermost thermistor 20 in the compartment 10 being connected in series with on the one hand a pressure gauge 19, which senses the pressure exerted on the pressure conduit 13 to the bottom valve 11 of the compartment and, on the other hand, with a limit transducer 18 of a manual or automatic valve 17, which is arranged on the manifolds or branch conduit 12 of the tank lorry.
  • This arrangement results in a feed-back coupling, such that the loading operation can begin only if the correct bottom valve 11 is pressurised and the correct operating valve 17 is open.
  • loading cannot begin until it has been checked that the engine of the tank lorry is not running and the pressure switch included in the safety circuit 23 has opened the necessary electric circuits for the starting motor and the engine, such that the engine certainly cannot be started during loading.
  • the depot tube 37 is connected to each individual compartment, and in this case the lorry is supplemented with a limit transducer on each compartment for sensing whether the depot tube 37 is connected to the correct compartment.
  • a multipolar electric member 33 is mounted on a cable from the tank lorry for the above-mentioned functions.
  • This member may have more contact pins than those shown, such that by strapping certain contact pins, it is possible to produce an identification code for the lorry involved.
  • a similar identification can be obtained by mounting an ID circuit on the tank lorry and connecting this ID circuit with the control circuit 35 and the computer 41 via the connecting cable from lorry to control circuit 35. Such an arrangement prevents mistakes and mishaps caused by the driver indicating an incorrect lorry code.
  • a capacity transducer 43 which senses liquid.
  • the transducer 43 is connected to the control circuit 35 of the depot via the multipolar electric member 33 and emits a signal to the control circuit if liquid should escape through the venting pipe. If the above-mentioned safety functions cannot be performed, this signal can therefore be used to activate emergency shut-down etc.
  • This compressed-air means comprises the connecting means 27 and also the same number of connecting means 14 as the number of compartments in the individual tank lorry.
  • the usual compressed-air system of the lorry is disconnected by means of a shuttle valve for each bottom valve. This means that compressed air is supplied from the depot only.
  • a compressed-air signal is used in order to disconnect the starting motor 25 of the tank lorry via the pressure switch included in the safety circuit 23.
  • the safety circuit 23 also checks that the engine of the lorry is switched off. The transducer of this pressure switch is, via the line 30, fed back to the depot. The unloading does not start without a feedback signal.
  • the carrying out of the invention requires modification of the depot as well.
  • a box In the unloading position a box is mounted, which contains the compressed-air valves 16 and 29 and the compressed-air connecting means 14, 27 in order to open the bottom valves 17 of the lorry and actuate the pressure switch included in the safety circuit 23 of the lorry.
  • the control circuit 35 (a PLC) is programmed so as to receive information on the compartment volumes of the lorry from a master computer having a database with information on the tank lorries concerned.
  • the unloading begins by the correct compartment receiving an opening signal.
  • the PLC control circuit 35 checks that all signals from the tank lorry are correct. If this is the case, the product valve 38 opens for filling a preselected quantity.
  • the preselected quantity has been dosed or the thermistor 20 of the depot has lost the signal, the unloading is interrupted until the driver has opened the operating valve 17 of the next compartment. This sequence is repeated until all preprogrammed compartments have been filled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP19970850071 1996-05-03 1997-05-02 Système de sécurité pour camions-citernes Expired - Lifetime EP0805121B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9601696A SE9601696L (sv) 1996-05-03 1996-05-03 Säkerhetssystem för tankbilar
SE9601696 1996-05-03

Publications (2)

Publication Number Publication Date
EP0805121A1 true EP0805121A1 (fr) 1997-11-05
EP0805121B1 EP0805121B1 (fr) 2002-07-31

Family

ID=20402446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970850071 Expired - Lifetime EP0805121B1 (fr) 1996-05-03 1997-05-02 Système de sécurité pour camions-citernes

Country Status (5)

Country Link
EP (1) EP0805121B1 (fr)
DE (1) DE69714337T2 (fr)
DK (1) DK0805121T3 (fr)
NO (1) NO312756B1 (fr)
SE (1) SE9601696L (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014074857A1 (fr) * 2012-11-08 2014-05-15 Selaware Capital Formation, Inc. Systèmes de commande empêchant la contamination croisée et comprenant des capteurs d'identité (id) de produit fluide
US10207912B2 (en) 2014-11-07 2019-02-19 Knappco Corporation Crossover protection system graphical user interfaces
US10407296B2 (en) 2016-10-12 2019-09-10 Knappco Corporation Optical fluid sensors for cross contamination control systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2018347983A1 (en) 2017-10-09 2020-04-09 Knappco, LLC Control systems for liquid product delivery vehicles

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058148A (en) * 1976-03-18 1977-11-15 Exxon Research & Engineering Co. Vapor hose hookup assurance
US4649968A (en) * 1985-01-10 1987-03-17 Air Products And Chemicals, Inc. Automatic precision liquid loading control system
US4780705A (en) * 1987-02-10 1988-10-25 Enterprise Brass Works Of Florida, Inc. Overfill sensing system
EP0440299A1 (fr) * 1990-02-02 1991-08-07 Shell Internationale Researchmaatschappij B.V. Système pour communication électronique de données entre deux réservoirs de fluide
WO1993009997A1 (fr) * 1991-11-12 1993-05-27 Marine Power And Control, Inc. Systeme pour prevenir le debordement de combustibles liquides
DE4215841A1 (de) * 1992-05-14 1993-11-18 Fass Werner Vorrichtung zur Steuerung der Befüllung und zur Sicherung gegen Überfüllung von Transportbehältern, insbesondere von auf Schienen fahrbaren Eisenbahntankwagen, mit Flüssigkeit
DE4402966A1 (de) * 1994-02-01 1995-08-03 Haar Maschbau Alfons Schlauchsicherung für die Fülleitungen eines mit einem Tankwagen in Strömungsverbindung zu bringenden Tanklagers
US5460210A (en) * 1990-09-28 1995-10-24 Dover Corporation Control system for filling tanks with liquids

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058148A (en) * 1976-03-18 1977-11-15 Exxon Research & Engineering Co. Vapor hose hookup assurance
US4649968A (en) * 1985-01-10 1987-03-17 Air Products And Chemicals, Inc. Automatic precision liquid loading control system
US4780705A (en) * 1987-02-10 1988-10-25 Enterprise Brass Works Of Florida, Inc. Overfill sensing system
EP0440299A1 (fr) * 1990-02-02 1991-08-07 Shell Internationale Researchmaatschappij B.V. Système pour communication électronique de données entre deux réservoirs de fluide
US5460210A (en) * 1990-09-28 1995-10-24 Dover Corporation Control system for filling tanks with liquids
WO1993009997A1 (fr) * 1991-11-12 1993-05-27 Marine Power And Control, Inc. Systeme pour prevenir le debordement de combustibles liquides
DE4215841A1 (de) * 1992-05-14 1993-11-18 Fass Werner Vorrichtung zur Steuerung der Befüllung und zur Sicherung gegen Überfüllung von Transportbehältern, insbesondere von auf Schienen fahrbaren Eisenbahntankwagen, mit Flüssigkeit
DE4402966A1 (de) * 1994-02-01 1995-08-03 Haar Maschbau Alfons Schlauchsicherung für die Fülleitungen eines mit einem Tankwagen in Strömungsverbindung zu bringenden Tanklagers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014074857A1 (fr) * 2012-11-08 2014-05-15 Selaware Capital Formation, Inc. Systèmes de commande empêchant la contamination croisée et comprenant des capteurs d'identité (id) de produit fluide
EP3312135A1 (fr) * 2012-11-08 2018-04-25 Delaware Capital Formation, Inc. Systèmes de contrôle de contamination croisée avec capteurs d'identification de produit fluide
EP3514108A1 (fr) * 2012-11-08 2019-07-24 Delaware Capital Formation, Inc. Systèmes de commande empêchant la contamination croisée et comprenant des capteurs d'identité (id) de produit fluide
US10207912B2 (en) 2014-11-07 2019-02-19 Knappco Corporation Crossover protection system graphical user interfaces
US10669147B2 (en) 2014-11-07 2020-06-02 Knappco, LLC Crossover protection system graphical user interfaces
US10407296B2 (en) 2016-10-12 2019-09-10 Knappco Corporation Optical fluid sensors for cross contamination control systems

Also Published As

Publication number Publication date
NO972034D0 (no) 1997-05-02
SE504529C2 (sv) 1997-03-03
NO972034L (no) 1997-11-04
DK0805121T3 (da) 2002-09-16
SE9601696D0 (sv) 1996-05-03
DE69714337T2 (de) 2004-03-04
EP0805121B1 (fr) 2002-07-31
SE9601696L (sv) 1997-03-03
DE69714337D1 (de) 2002-09-05
NO312756B1 (no) 2002-07-01

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