EP0731056B1 - Control and safety device and method for transferring liquid between a tanker truck and an underground storage tank - Google Patents

Abstract

At least one hose (30,31) is connected to at least one transfer pipe (22,23) by a transfer appliance (5,6) with connecting fitments (15,16). The inspection system forms a circuit (3) together with a power supply (1,2), and has a threshold value indicator (10) switching on the transfer appliance, on the storage container (20). At least one safety device interrupts the circuit of the threshold value indicator when the transfer process is defective, and the indicator switches off the transfer appliance on the tanker.

Description

The invention relates to a system and a method for monitoring and securing the transfer process between a tanker and a particularly underground storage container or another Tanker or between storage containers, at least one Hose using a transfer device with connection fittings, for example. on the tanker to at least one transfer tube, e.g. the storage tank is connectable and the monitoring system with a power supply a circuit forming a decanting device switching level indicator on the storage container. The invention further relates to the use of the system.

In the prior art, filling processes or refilling processes partly unsecured from tankers to underground storage containers or at least with inadequate security or security systems carried out. It may be due to poor maintenance or Misconduct by the operating personnel and as a result of faulty or damaged fittings and hoses lead to accidents which soils and / or groundwater in the area of the storage tanks for water-polluting substances such as fuels or acids occasionally be significantly burdened. The reason for such accidents is in practice, a jumping off or tearing off of the filling hose known during the filling process. Attacks the tanker driver or the security system in such a case can not immediately several thousand liters of fuel into the ground in just a few minutes reach.

To protect the environment, the legislator has therefore within the Federal Immission Control Ordinance, the Ordinance on Installations for Handling of water-polluting substances and through specialist companies (VAwS); Status: 12.08.1993, the petrol station ordinance and other legal Regulations on the use of a filling hose safety device (ASS) required.

It is also currently protecting the environment against fuel spills also monitoring the use of a gas pendulum hose required to prevent escaping fuel vapors to prevent from the storage container when filling.

In the prior art systems are known which formally meet the requirements. One of these systems will A data signal from the tanker in via filling and gas pendulum hose sent the cathedral shaft. A control unit is activated there, which in turn sends data back over the hose. Has a disadvantage it turned out, however, that the necessary equipment for Implementation of the system has defects when used in the cathedral shaft. E.g. are the means of establishing a safe contact between filling hose and control unit in the dome shaft susceptible to faults and mechanical loads during extended operation not grown enough, or can at sub-zero temperatures freeze. A plastic coupling used for insulation, for example requires a precisely dosed tightening torque to fix them. If you overtighten or tighten too little, Leaking amounts of so-called slobber, which continue to leak mostly penetrate the soil in an uncontrolled manner. Also will a defect of the limit transmitter on the storage tank is not recognized and does not prevent the storage tank from overflowing with the consequence of considerable amounts of leakage. The known system also requires significant investment that small or medium-sized enterprises be afraid to implement the system.

A system for monitoring the connection is known from EP 0 330 859 B1 of closable pipes and one between them Pipelines connectable connecting line known. The connecting line is designed to be electrically conductive and forms a part of it a closed circuit a monitoring device. The Shut-off devices of the pipelines are only by a Control device operable by the monitoring device is activated. An emergency stop switch is arranged in the circuit, through which the intrinsically safe circuit when needed can be interrupted. Via resistance or current measurement the closed state of the circuit is defined in Checked time intervals. As long as the pulsed signals to the monitoring device run back, the shut-off devices remain Pipes opened, otherwise they are closed. A disadvantage of this known monitoring system is that this system is very prone to failure if it is in the cathedral shaft underground storage container is arranged. Furthermore, with this previously known system can not be identified whether the Couplings are connected media-tight, so that considerable quantities of environmentally hazardous substances can get into the environment. This is caused in particular by the fact that the current flow for monitoring of the hose connection also occurs when the connection flange the connecting cable only loosely on the one to be connected Pipe (filler neck) rests. This known surveillance system therefore emphasizes that the shut-off devices exclusively via the one that can be activated by the monitoring device Control device can be actuated.

EP-0 330 860 B1 describes a monitoring system for filling or against overfilling a container is known, a PTC resistor the maximum permissible product level in the container detected. Between a filling pipe and a connecting pipe there is an electrically conductive connection line on the container arranged, isolated from the tap and the container is. An electric one is used to monitor the filling process Circuit in which the connecting line and the PTC resistor are connected in series. The PTC thermistor is immersed in the medium in the container, its change in resistance is monitored by a monitoring device detected and the shut-off devices in the Filling pipe closed by a control device after this was activated by the monitoring device. About resistance or Current measurement is the same as in EP-0 330 859 B1 closed state of the circuit at defined time intervals checked by means of pulses. This surveillance system is from the previously mentioned reasons susceptible to failure and leaky couplings with the result of spillage of contaminants will not identified. So here is a surveillance system dealt with which the PTC resistor and the connecting line in one Circuit are connected in series. It is also stated that the monitoring device has at least one voltage source and Functional elements for measuring suitable electrical parameters of the Circuit includes, namely to detect the mechanical state the connecting lines and the level. Finally the previously known system explicitly refers to a stationary one Tap and a portable storage container.

Systems are known from DE 34 36 893 A1 and DE 36 42 405 A1, monitoring and control for filling protection of tank systems to serve. However, the proposed measures relate on the prevention of the filling process with swapped limit sensors and the correct assignment of the limit switches to the respective Filler neck. In this context, contactless working Spoken sensors for monitoring the hose connection, wherein magnetic sensors are not mentioned.

All known systems are based on the fact that the monitoring and Control devices implemented with active electrical components are.

Based on the shortcomings identified in the prior art the invention has for its object a new system and method for monitoring and securing the transfer process between one Tanker and a storage container of the type mentioned to indicate which is extremely robust and for use in the cathedral shaft as well as in a tanker vehicle under the rough ones given there Operating conditions is suitable, and also inherently fail-safe is, i.e. that if an error occurs in the safe Operating state drops by locking itself and becoming one Failure to release the filling process or to interrupt it leads, furthermore, to the equipment of existing tankers and storage tank systems retrofittable and retrofitting and / or new equipment the operator is reasonable for cost reasons.

The object is solved by claims 1-22.

The task is solved with a system for monitoring and Securing the transfer process between a tanker and a Storage container of the type mentioned in the preamble of claim 1 the invention in that at least one of the existing level monitoring system switched on fail-safe working Safety device is provided, which in the event of a fault Transfer process interrupts the circuit of the limit indicator and this switches off the decanting device on the tanker. The fail-safe working safety device closes such System elements that are included in the system anyway and fall in the event of system errors, always in the operationally safe state. In further development of the inventive concept, in particular for safe Transfer of fuels for motor vehicles with petrol engines or Diesel engines are advantageously provided that the circuit the limit transmitter and / or its electronics at least one of the Filling hose and / or gas pendulum hose and / or their fittings assigned and with these directly or via mechanical / electrodynamic excitable means interacting additional circuitry which has the circuit of the limit indicator, which arises when the limit switch is connected correctly lasts as long as the filling hose or filling hose and gas pendulum hose correct with their fittings on the storage container side and / or vehicle-side connections connected or not are interrupted, and the circuit breaks as soon as fittings or hoses are not connected correctly, or hoses completely or partially torn off.

In contrast, the prior art monitoring system according to EP 0330859 B1 rises from the fact that the shut-off devices can be actuated exclusively by the activatable by the monitoring device controller. In the system according to the invention, the control device is activated via the PTC resistor / limit value circuit, ie the exclusivity is not given.

In contrast, EP 0 330 860 B1 deals with a monitoring system in which the PTC resistor and the connecting line are connected in series in a circuit. This is not the case with the system according to the invention; here the current via the connection lines, i.e. hoses, is only galvanically connected, there are at least two circuits. EP 0 330 860 B1 also states that the monitoring device comprises at least one voltage source and functional elements for measuring suitable electrical parameters of the circuit, specifically for detecting the mechanical state of the connecting lines and the fill level. This is also not the case with the new system according to the invention.

The new method presented here uses a new one Circuit with passive components such as reed sensors or relays existing circuit interrupted or closed. Because of this process the filling process is interrupted or released. This idea does not underlie all known systems and does not emerge from these.

The system according to the invention and the corresponding system are thus based Procedure based on a functional principle by which when filling underground storage tank of tank vehicles with the help of electrical current and its continuous flow the correct one Connection of all connection elements including the hoses determined becomes. The filling process can only start or to be continued as soon as all the intended connecting and connecting elements connected correctly. Thereby the complete demolition of a hose during the filling process practically without delay and the filling process also interrupted without delay. With fuels with volatile components such as ethanol or benzene are filled a storage container with gas oscillation, i.e. displaced gases and vapors are released into the container during liquid dispensing of the tanker vehicle by volume compensation against the liquid returned. Filling a storage tank for diesel fuel or kerosene can be done without gas exchange. More beneficial Training of the surveillance and security system are described in the subclaims.

Figur 1

ein Schalt- und Funktionsschema des Systems mit zur Überwachung des Umfüllvorganges zwischen einem Tankfahrzeug und einem unterirdischen Lagerbehälter mittels elektrischem Strom;

Figur 2

ein Schalt- und Funktionsschema des Systems mit Sicherung durch elektrischen Strom und mechanische Abtastung;

Figur 2a

ein Schalt- und Funktionsschema mit zwei DC/DC Wandlern und Schaltung des Grenzwertgeberstromkreises,

Figur 2b

ein Schalt- und Funktionsschema mit zwei DC/DC Wandlern und Schaltung der Stromversorgung des Grenzwertgebers,

Figur 3

ein Schalt- und Funktionsschema eines Sicherungssystems für Schlauchanschlüsse mit mechanischer Abtastung;

Figur 4

ein Schalt- und Funktionsschema einer Abfüllsicherung mit mechanischer und elektrodynamischer Anregung und Beschleunigungssensoren;

Figur 5

eine andere Ausführung eines Sicherungssystems mit elektrodynamischer Anregung und Beschleunigungssensoren;

Figur 6

in Ansicht und teilweise im Schnitt eine elektromechanische Abtastung an einem Schlauchanschluß;

Figur 7

ein Schema einer elektromechanischen Überwachung des Peilstabsitzes;

Figur 8

Mittel zur Anschlußüberwachung des Peilstabsitzes durch elektromagnetische Abtastung am Führungsrohr;

Figur 9

Mittel zur elektrischen Anschlußüberwachung des Peilstabsitzes durch eine Kontaktbrücke;

Figur 10

ein Schema einer Abfüllschlauchsicherung mit elektromechanischer Abtastung der Anschlußkupplungen;

Figur 11a-11d

Anordnung von Überwachungsmagneten und Reed-Schaltern an Schlauchkupplungen;

Figur 12a, 12b

Schlauchkupplungsteile mit integrierten Überwachungselementen, im geöffneten Zustand;

Figur 13

die Schlauchkupplungsteile gem. Fig. 12a, 12b im ordnungsgemäß gekuppelten Zustand.

The invention is explained in more detail below on the basis of exemplary embodiments, expedient details of the invention being apparent from the drawings. Show it:

Figure 1

a circuit and functional diagram of the system with to monitor the transfer process between a tanker and an underground storage container by means of electrical current;

Figure 2

a circuit and functional diagram of the system with protection by electrical current and mechanical scanning;

Figure 2a

a switching and functional diagram with two DC / DC converters and switching of the limit switch circuit,

Figure 2b

a switching and functional diagram with two DC / DC converters and switching the power supply of the limit switch,

Figure 3

a circuit and functional diagram of a security system for hose connections with mechanical scanning;

Figure 4

a circuit and functional diagram of a filling protection with mechanical and electrodynamic excitation and acceleration sensors;

Figure 5

another embodiment of a security system with electrodynamic excitation and acceleration sensors;

Figure 6

in view and partly in section an electromechanical scanning on a hose connection;

Figure 7

a diagram of an electromechanical monitoring of the dipstick seat;

Figure 8

Means for monitoring the connection of the dipstick seat by electromagnetic scanning on the guide tube;

Figure 9

Means for electrical connection monitoring of the dipstick seat by a contact bridge;

Figure 10

a diagram of a filling hose fuse with electromechanical scanning of the connection couplings;

Figure 11a-11d

Arrangement of monitoring magnets and reed switches on hose couplings;

Figure 12a, 12b

Hose coupling parts with integrated monitoring elements, when open;

Figure 13

the hose coupling parts acc. 12a, 12b in the properly coupled state.

Fig. 1 shows a first embodiment in a circuit and functional diagram of the system for monitoring and securing the transfer process between a fictitious tanker 19 and an underground one Storage container 20 with dome shaft 21. With 11 is the current one Level marked. In the storage container 20 is at the maximum permissible liquid level of the limit indicator 10 arranged. There is a voltage supply on the tanker 19 1 with the power source 2, for example a conventional 24 volt battery arranged. The power supply 1 of the limit transmitter 10 has a DC / DC converter 9 on a potential-free circuit 3, with at least one of the filling hose 30 and / or the gas pendulum hose 31 and / or their fittings 15 to 18 associated with them directly or via mechanically / electrodynamically excitable means 33 to 36 (see FIG. 4) interacting additional circuit arrangement, which closed the circuit 3 of the limit indicator 10 lasts as long as the filling hose 30 or filling hose 30 and Gas pendulum hose 31 correctly with their fittings 15 to 18 to the storage container and / or vehicle-side connections 5, 6; 22, 23 connected or not interrupted, and the circuit 3 interrupts as soon as fittings 15 to 18 or hoses 30, 31 fail are correctly connected or hoses 30, 31 in whole or in part are torn off.

• eine Leitung 100 zwischen dem Plus-Potential der Spannungsversorgung 1, 2 des Tankfahrzeugs 19 über einen DC/DC-Wandler 50 und dem Füllschlauch 30 oder Füllschlauchstutzen 5;
• eine Leitung 101 zwischen dem Minus-Potential des DC/DC-Wandlers 9, 50 und dem Minus-Potential des Grenzwertgebers 10;
• eine am Plus-Potential des Füllrohres 22 im Domschacht 21 angeschlossene Leitung 102 mit einer Verzweigung in zwei Leitungsäste 103, 104, von diesen abzweigend
• einen Ast 103 mit einer Relaisspule S2 mit Schalter C2 und Anschluß an einen zwischen den Isolationen 24, 25 angeordneten isolierten Bereich des Gaspendelschlauches 31 oder Gaspendelrohres 23;
• einen Ast 104 mit Wahlschalter C3 und anschließender Leitung 105 für das Plus-Potential mit Verbindung entweder direkt oder über Schalter C2 an die Spule S1 mit Schalter C1;
• eine Verbindung der Spule S1 mit der Leitung 106 an das Plus-Potential des Stromkreises vom Grenzwertgeber 10, wobei
• die Leitung über DC/DC-Wandler 9 zwischen der Spannungsversorgung 1, 2 und dem Schalter C1 angeschlossen ist;
• der Grenzwertgeber 10 zwischen Schalter C1 und über DC/DC-Wandler 9 dem Plus-Potential der Spannungsversorgung 1 angeschlossen ist;
• und das Plus-Potential des isolierten Gaspendelschlauches 31 über DC/DC-Wandler 9 mit dem Minus-Potential der Spannungsversorgung 1, 2 über eine Leitung 107 verbunden ist.

The additional circuitry includes the following features

• a line 100 between the plus potential of the voltage supply 1, 2 of the tank vehicle 19 via a DC / DC converter 50 and the filling hose 30 or filling hose connector 5;
• a line 101 between the negative potential of the DC / DC converter 9, 50 and the negative potential of the limit value transmitter 10;
• a line 102 connected to the plus potential of the filling pipe 22 in the dome shaft 21 with a branching into two line branches 103, 104, branching off from these
• a branch 103 with a relay coil S2 with switch C2 and connection to an insulated area of the gas pendulum hose 31 or gas pendulum tube 23 arranged between the insulations 24, 25;
• a branch 104 with selector switch C3 and subsequent line 105 for the plus potential with connection either directly or via switch C2 to coil S1 with switch C1;
• a connection of the coil S1 to the line 106 to the plus potential of the circuit from the limit indicator 10, wherein
• the line is connected via DC / DC converter 9 between the voltage supply 1, 2 and the switch C1;
• the limit switch 10 is connected between the switch C1 and via DC / DC converter 9 to the plus potential of the voltage supply 1;
• and the plus potential of the insulated gas pendulum hose 31 is connected via DC / DC converter 9 to the minus potential of the voltage supply 1, 2 via a line 107.

The coil S1 draws its negative potential from the circuit 3 of the Limit switch 10, the negative potential between the voltage source the limit value supply 1 and the switch C1 is tapped. The limit transmitter 10 is located between Switch C1 and the plus potential of the voltage source for supply of the limit switch 10. The plus potential is on the tanker of the gas pendulum hose 31 with the minus potential of Voltage source 1, 2 connected. The gas pendulum hose 31 is between the tap and the transport tank of the tanker vehicle 19 isolated by insulation 25.

The selector switch C3 is used for a storage tank for petrol set to position 1 and with a storage tank for diesel fuels to position 2. The selector switch C3 is switched in the simplest case, manually.

With the system shown in Fig. 1 with the help of electrical Current the correct connection of a hose 30, 31 determined. The filling process can only start or continue if the hoses 30, 31 are correctly connected and intact. Becomes a tear or partial tear of a hose during filling determined, then the filling process is practically without delay interrupted. When filling a storage tank for petrol fill hose 30 and gas pendulum hose 31 are correct connected, after which a current via filling hose 30, filling pipe 22, Coil S2, gas pendulum tube 22 and gas pendulum hose 31 flows. Thereby switch C2 is closed. As a result, electricity flows in Coil S1 and closes switch C1. The limit indicator electronics 90 releases the filling process.

If the gas pendulum hose 31 or the filling hose 30 is not correct connected, switch C2 and thus switch C1 remain open, the circuit 3 of the limit switch 10 is opened, the limit switch electronics 90 does not release the filling process.

Tears all or part of a hose during the filling process off, switch C2 is opened, then coil S1 does not flow Current, switch C1 opens, limit switch 10 and limit switch electronics 90 interrupt the filling process of the storage container 20, preferably by a known quick-closing valve in the filler neck 5 of the tanker 19.

Used to fill a storage tank for diesel fuels Filling hose 30 correctly connected, a current flows through the filling hose 30, filling tube 22 and switch C3 in position 2. This a current flows in coil S1 and closes switch C1. The limit indicator electronics 90 releases the filling process.

If the filling hose 30 is not connected correctly, the switch remains C1 opened, the circuit of the limit indicator 10 remains open, the limit indicator electronics 90 do not release the filling process. Tears the filling hose 30 completely or during the filling process partially off, switch C1 is opened, the limit indicator electronics 90 immediately interrupts the filling process of the storage container 20th

Through fictitious lines 108, 109, an earth contact is otherwise the Hoses 30, 31 indicated.

Fig. 2 shows an essentially similar circuit and functional diagram of the system of FIG. 1 with the difference that the Connection couplings of the fittings 17, 18 for filling hose 30 and Gas suspension hose 31 additional electromechanical monitors 38, 39 are provided. It is based on an exemplary in the embodiment shown in FIG. 6 by a known per se liquid-tight coupling 15 to 18 at the connection points between filling hose 30 on the one hand and filling pipe socket 5 / filling nozzle 2 on the other hand, or a corresponding gas-tight coupling between the gas pendulum hose 31 on the one hand and the gas pendulum tube 23 / connecting piece 6 on the other. 6 is one purely exemplary embodiment shown with a so-called screw coupling, in which hook-shaped claws 26, 27 helical Reach under guides 28, 29 and by rotating the Seal the coupling halves together. There is a magnetic switch on the side 44 arranged, the closed when the claw 26 is properly seated is, so that the circuit 3 of the limit switch 10 - like 1 - closed. In the event of incorrect assembly the coupling halves, for example the magnet 45 - it can also be a magnetic ring - from the intended position raised by spring force. This will via the magnets M1, M2 (see FIG. 2) the corresponding interruption switch CM1 or CM2 opened and the circuit 3 of the Limit transmitter 10 interrupted, the switching electronics 90 the Filling process on the vehicle-side connections blocks or interrupts. The other switching elements correspond to the system of FIG. 1. In Fig. 3 are the previously described electromechanical Monitors 38, 39 in series in circuit 3 of the limit switch 10 switched. The safety switches C1 and C2 have been omitted.

Figure 2a shows a circuit variant of Figure 2. The positive The potential of two DC / DC converters 9 becomes after an insulating piece 25 to the electrically conductive filling hose 30 or to the gas pendulum hose 31 connected. The current flows up to one at a time electromechanical scanning 38, 39, which the reed sensors Current flow only enabled if the hose connection is correct. The circuit is in each case via a third line 1 'in the limit indicator connecting cable realized. If the circuit is closed, close it the reed relays d11 and d12 the limit transmitter circuit. At Open hose tear or incorrect hose connection d11 and / or d12, interrupt the limit transmitter circuit and terminate immediately the filling process. Compared to the circuit of Fig. 2 has only changed that the mass via an additional line 1 'to Tanker 19 is performed. For a storage tank for diesel fuel the reed relay d12 is bridged, because in this case the Monitoring of a gas pendulum hose is not necessary. Schematic is in Fig. 2a also shows the case that a second storage container 20 'each with a filling hose 30' or a gas pendulum hose 31 ' is arranged. Reed relays d21 and d22 close the limit switch circuit, if the circuit via DC / DC converter (not closer shown) and via conductive filling hose and gas pendulum hose and after approval of the electromechanical monitoring of the couplings closed is.

Figure 2b shows a further circuit variant. The positive potential two DC / DC converter 9 is after an insulating piece 25 to the electrically conductive filling hose 30 or to the gas pendulum hose 31 connected. The current flows up to one electromechanical Sampling 38, 39, the current flow via reed sensors only releases if the hose connection is correct. The circuit will each via a third line 1 'in the limit indicator connection cable realized. Is the gas pendulum hose 31 when filling petrol correctly connected, reed relay d11 closes the circuit via the filling hose 30. The circuit closed in this way via the filling hose 30 gives the reed relay d10 Power supply of the limit switch 10 free, so that the filling process is released. When filling diesel fuel (without Gas swing) the switch d11 is bridged in the diesel dome shaft, so that the correctly connected filling hose 30 the power supply the limit switch 10 unlocks. If the hose breaks or incorrect reed connection open reed relays d10 and / or d11, interrupt the power supply to the limit switch circuit and immediately stop the filling process. Compared to the circuit variant 2a has changed that no longer in the circuit of the limit switch 10 is intervened, but in the power supply the limit switch 10.

4 is another embodiment of the filling hose safety system shown, in which the monitoring of the correct Seat of the hoses and couplings in particular the demolition of one Hose when filling storage containers with the help of structure-borne noise detected and the filling process is interrupted immediately. The system is with alternative designs in FIGS. 4 and 5 shown.

4 are located on the tanker 19 in Connection with the on-board battery (not shown) Limit transmitter electronics 90 and at the filler pipe socket 5 a sound generator 49 and on the connecting piece 6 of the gas pendulum hose 31 the sound generator 49 '. This is about mechanical / electrodynamic exciters for sound generation, such as in Ultrasound area for material examinations or medical Diagnostics or other similar purposes are known per se. On the opposite side, in the area of the gas pendulum tube 23 and filling tube 22 electro-acoustic acceleration sensors 33 and 34 are arranged, which interact with integrated circuit breakers 35, 36 and with a pre-programmed change in the frequency range of the sound waves generated, the acceleration sensors 34, 35 activate, which then open the switches 35, 36, thereby interrupt the circuit of the limit switch 10 and suddenly stop the filling process. The acceleration sensors 33, 34 have their own power supply 7, 8 and are otherwise connected to the limit indicator electronics 90.

The acceleration sensors 33, 34 thus monitor the entire Resonance chamber of the filling line 5, 22, 30 or the gas suspension line 6, 23, 31 and are able to deal with any disturbance occurring therein manifests itself in a frequency-dependent damping of structure-borne noise, report spontaneously and thus interrupt the filling process. This is done by the transfer function of the sound conducting Complete system such as outlet nozzle, filling hose, storage tank, piping, Gas pendulum hose, connecting piece etc. depending on the excited vibrations recorded by measurement and digital in the Evaluation electronics is stored. Will the transfer of the Structure-borne noise in this system, for example, by tearing off a hose interrupted, the transfer function changes significantly. This is immediately done by the evaluation electronics by comparison with the stored target transfer function detected.

The filling process is carried out with the help of the limit indicator electronics 90 controlled. This is done in the electrical supply line 3 of the limit indicator 10 an electrodynamic switching relay installed. are Filling hose 30 and gas pendulum hose 31 properly connected, the switching relay is replaced by the evaluation electronics Accelerometer switched, i.e. the contact is closed. The filling process continues until the limit transmitter 10 interrupts the current flow when in contact with fuel in the storage container 20, and so the filling process stops immediately. Now tear the filling hose 30 or gas pendulum hose 31, the structure-borne noise transfer function changes; a sensor 33 or 34 responds, interrupts the current flow by switching a switching relay 35, 36, and the limit value transmitter electronics 90 ends the instantaneous Filling process.

A second variant of functional security using structure-borne noise is shown by way of example in FIG. 5. This variant is on the tanker 19, at its outlet 5 for the fuel electroacoustic, dynamic sound generator 49 permanently mounted. Of the Structure-borne noise generated in a certain frequency spectrum is over the filler pipe socket 5, the filler hose 30, the filler pipe 22 and further through the interior of the storage container 20 through the Gas pendulum tube 23 in the dome shaft 21, further through the gas pendulum hose 31, and the connecting piece 6 on the vehicle 19 to the acceleration sensor 48 headed. The acceleration sensor 48 is in the Able to record the incoming structure-borne noise. One belongs to him Evaluation electronics 90, which are dependent on certain frequency windows determined that the structure-borne noise actually through the filling hose 30 / gas pendulum hose 31 has reached.

This decision is possible with the help of the frequency window, because Different transfer functions depending on the path of structure-borne noise are decisive, i.e. the amplitudes of structure-borne noise are damped depending on the frequency.

The respective transfer function is dependent on the excited one Vibrations recorded by measurement technology and digitally in the evaluation electronics filed. Is the transmission of structure-borne noise in this Chain interrupted by tearing off a hose 30, 31, so changes the transfer function is essential. This will be instantaneous through the evaluation electronics of the acceleration sensor 48 detected and converted into a control pulse. Through this the break switch 43 is opened, which then circuit 3 (Fig. 1) the limit switch 10 interrupts and so the filling process either does not release or stop immediately.

The connection of the limit indicator 10 to its power supply 1, 2 or to the limit indicator electronics 90 by means of a plug 4 trained in the cathedral shaft 21. This applies to both 5 as well as according to FIGS. 1 to 4.

7 is a diagram of an electromechanical monitoring the seat shown by the dipstick. Such monitoring is required because practical experience shows that the operating personnel during the decanting process on the storage container 20th pull the existing dipstick 13 out of the guide tube 12 because it does so due to the reduction in the pressure difference during the transfer process displaced gas volume the filling process by up to 20 to 25% is shortened. As a result, a large part of the volatile flows Components of the fuel not as intended by the connected gas pendulum hose 31 back to tanker 19, but escapes through the dipstick opening of the guide tube 12 in the area, but what exactly through the gas pendulum monitoring should be prevented in accordance with the operating instructions. To ensure this electromechanical monitoring of the dipstick seat provided, with the help of which the filling process is only released will be when the dipstick 13 is inserted into the guide tube 12 and Head 14 is properly locked.

For this purpose, the guide tube 12 is working correctly Monitoring device 40 attached to the improper Seat and / or locking of the dipstick 13 the circuit 3 of Limit switch 10 interrupts and this the refilling process on Tanker 19 switches off.

The device can preferably be attached to the guide tube 12 Have electromechanical scanning 40, with which when properly Locking the dipstick 13 by a tilting, rotating or Tilt-turn movement or the like on the head 14 of the dipstick 13 arranged magnet 41 corresponding to a representation in FIG. 8 in cooperation with one attached to the guide tube 12 Magnetic switch 42 activates this as soon as the magnet 41 is approximately in the horizontal plane of the magnet (reed) switch 42 has reached. The head 14 of the dipstick 13 is then in the guide tube 12 locked properly. The magnetic switch 42 closes one integrated in the circuit 3 of the limit indicator 10 Branch circuit 130, circuit 3, with current via the limit switch 10 flows and this releases the transfer process.

9 is another embodiment of monitoring the Dipstick seat represented by a contact bridge. It is Guide tube 12 at least in the area of the seat from the dipstick head 14 made of non-conductive material, preferably plastic and formed with built-in contacts 131, 132 that the Branch circuit 130 and at the same time circuit 3 of the Interrupt or close limit switch 10. The head 14 of the Dipstick 13, on the other hand, consists of electrically conductive material like brass, due to its conductivity when properly locked Head of the dipstick 13 of the secondary circuit 130 and at the same time this the circuit 3 closed and the transfer process released becomes.

Another way of ensuring that the dipstick is properly seated 13, the use of a light barrier, for example, the structure of which requires no further explanation. Furthermore, the Monitoring also by a structure-borne noise generator in cooperation with one stored in the electronics 90 of the limit indicator 10 Target transfer function take place. The effect is one changed sound transmission or resonance function when locked or unlocked dipstick 13 used.

In all of these embodiments, the filling process is instantaneous interrupted as soon as the dipstick 13 or the dipstick head 14 not properly in the area of the upper opening of the dipstick guide tube 12 is locked.

10 to 13 is an electrical circuit diagram (Fig. 10) and on the other hand are electromechanical monitoring elements and switching arrangements (Fig. 11 to 13) on hose coupling parts shown with integrated monitoring elements.

Figure 10 shows that in line 101 via DC / DC converter 9 between the negative potential of the voltage supply 1, 2 and the positive Potential of the limit switch 10, as shown in detail in the 11a to 11d can be seen, the coupling part 52 on the tanker connector 5 and the coupling part 54 on the filling tube 22 of the Storage tanks 20 each have an interruption (reed) switch 62, 64, and the Coupling part 56 on the tanker connector 6 and the coupling part 58 an interruption (reed) switch on the gas pendulum tube 23 of the storage tank 20 66, 68 is assigned, as well as the corresponding Couplings 72, 74 of the filling hose 30 and the couplings 76, 78 of the gas pendulum hose 31 each have a scanning permanent magnet 82, 84 and 86, 88, each firmly in the connector of the hose is integrated, is assigned, wherein the reed switches 62 to 68 according to the circuit diagram of FIG. 10 connected in series with one another via secondary circuit 131, 132 and un the circuit 3 of the limit switch 10 are integrated, and this only after all coupling parts have been properly connected 52 to 58 is closed with couplings 72 to 78 and the Transfer process is released.

This can be seen in detail from FIGS. 11a to 11d. After that are the reed switches 62, 64, 66, 68 each on the metallic Socket 5, 6 of the tank truck 19 and the metallic socket 22, 23 of the filling pipe 22 and the gas pendulum pipe 23 on the storage tank 20th arranged, whereas those with hook-shaped claws 26, 27 and with can be opened and closed, locked in the folded position Handles 89 provided parts 72, 74, 76, 78 on the hose coupling are provided at both hose ends. Are currently the coupling part with the hook-shaped on the tanker connection Claws and the counterpart of the coupling at the associated hose end. For the new monitoring system, both coupling parts have to be exchanged, provided the hose connection on the tanker truck is monitored should. If only the hose connection in the dome shaft is to be monitored, it is not necessary to swap both coupling parts. On the The hose end belonging to the manhole is located as outlined Coupling part with the hook-shaped claws 74, 78 already on Hose end.

The reed switches 62, 64, 66, 68 are in the circuit 3 of the Limit transmitter 10 integrated, each via secondary circuits 131, 132 and are without the presence of a magnetic Field opened. When a permanent magnet 62, 64, 66, 68 due to a rotary movement of the corresponding fittings the reed switches are switched and thus the circuit 3 of the limit switch 10 closed. Monitoring the individual connections between hose 30, 31 and tank truck 19 or storage container 20 is connected in series and in the circuit 3 of the limit indicator introduced so that only after connection of all couplings 15, 16, 17, 18 this circuit 3 is closed. The supervision individual connections can be made either by reed switches and several Permanent magnets, through several reed switches and a permanent magnet or by several reed switches and several permanent magnets respectively. If multiple reed switches to monitor the If a connection is available, they must be connected in parallel be. The closing of the clutches and thus the approach between permanent magnets and reed switches by placing and lateral rotation of the coupling parts 73, 74, 76, 78 and locking the lever 89 in the folded position. This is can be seen in detail from FIGS. 12a, 12b and 13.

FIG. 12a shows the rotatable coupling element on the filling hose 30 72 with the foldable hand lever 89 and the claw-shaped Holding elements 26 and 27. These engage in helical guides 28, 29 of the coupling piece 52 fastened to the filler pipe socket and are symbolized by a rotational movement, symbolized by an elliptical Arrow, locked and sealed. 12a and 12b the clutch 15 is still open. Then there is the permanent magnet 82 with its magnetic field outside the field area of the reed switch 62, which is then still open and the entire circuit the limit transmitter 10 keeps interrupted.

13, the clutch 15 is shown in the closed state, then the permanent magnet 82 the reed switch 62 so far is approximated that this switches due to the magnetic field and the Circuit of the limit switch 10 closes. This then gives that Transfer process free.

According to the description of those shown and explained in FIGS. 1 to 13 Exemplary embodiments are the functional principle according to the invention Describe the processes that can be assigned to the system as follows: an existing level monitoring system with limit switch for the fill level in the storage container connected safety device, Which existing system elements are included is at a malfunction of the system elements by changing the electrical Resistance simulated an upper tank level, or by Interruption of the circuit of a limit switch that is not connected is displayed, after which the limit indicator electronics complete the transfer process interrupts. This system is used in particular for monitoring and securing a transfer process between a tanker vehicle 19 for fuels and an underground storage container 20, which in a dome shaft 21 with a filling pipe 22 and a gas pendulum pipe 23 has, during the transfer process through a filling hose 30 and a gas pendulum hose 31 on the one hand to a filling device 5, 6 with connection fittings 15, 16 of the tanker 19 and on the other hand on the filling pipe 22 and gas pendulum pipe 23 of the storage container 20 can be connected and a voltage supply to the tanker 19 1, 2 a potential-free circuit via a DC / DC converter 9 3 forming a limit switch which switches the filling device 5, 6 10 with electronics 90, which when a predetermined filling level 11 in the storage container 20 the filling process prevents or interrupts, the circuit 3 of the limit switch 10 or its electronics 90 are connected so that they Filling process with closed circuit depending on resistance release and / or do not release if the circuit is interrupted or interrupt and the method is characterized in that the circuit of the limit switch 10 and / or its electronics 90 with at least one of the filling hose 30 and / or the pendulum hose 31 and / or their fittings 15 to 18 assigned and with this directly or indirectly mechanically / electrodynamically interacting additional circuit arrangement connected in series which closes the circuit of the limit indicator lasts as long as the filling hose 30 and / or the gas pendulum hose 31 correctly with their fittings 15 to 18 on the storage container and / or vehicle connections 5, 6; 22, 23 connected or are not interrupted, and the circuit breaks, as soon as fittings 15 to 18 or hoses 30, 31 are not connected correctly or hoses are torn off in whole or in part.

Finally, the system is used according to the claims 1 to 9 for monitoring and securing a transfer process between a tanker 19 and an underground storage container 20 and in particular for the immediate interruption of the transfer process Breakage and / or incorrect connection of filling hose 30 or Filling hose 30 and gas pendulum hose 31.

Another use of the monitoring system according to the invention relates to the filling of underground storage containers 20 with central filling shaft. This means that all filling tubes 22 with associated limit switch 10 and usually with two gas pendulum tubes 23 are accommodated in a filling dome 21. The special The problem is that the gas pendulum tubes 23 are not assigned to the respective filler tubes 22 or limit switches 10 more possible is. As a rule, you have up to six filling tubes 22 with associated ones Limit switches 10. Here the filling hose safety device is based on the same principle as for the single filling dome. Are filling hose 30 with associated limit transmitter 10 and a gas pendulum hose 31 correctly connected, then the circuit is constructed so that the Circuit created via the gas pendulum hose via the minus potential of the limit switch circuit or via a third Line 1 'in the limit switch connection cable closes. The electrical Connections of this gas pendulum hose 31 to all other limit indicators 10 is by reed relay, which by the existing Circuit are switched, interrupted. For example, become the second Filling tube 30 'with associated limit transmitter 10' and the second Gas pendulum hose 31 'connected, closes as before described the limit transmitter circuit and in turn all other electrical connections to the remaining limit switches interrupted.

The embodiments of the invention shown in FIGS. 1 to 13 are to be understood only as an example. In particular, the scanning elements 38, 39 (Fig. 2, Fig. 3) regarding their execution, for example. with regard to the arrangement and design of the switching elements 44, 45 left to the professional discretion of the designer. Same thing applies to the design and arrangement of acceleration sensors 48 and sound generators 49. The functionality of the System is due to a redundant design of the switching elements, For example, the limit switch 10 is significantly increased.

The invention optimally fulfills the task set out above, in particular because it is ensured that the filling process for the storage container is only possible if the limit indicator, filling hose and gas pendulum hose are connected in a dome shaft.

Claims (22)

1. Control and safety system for transferring liquid between a tanker truck (19) and an in particular underground storage tank (20) or another tanker truck or between storage tanks, whereby at least one hosepipe (30, 31) is connectable by means of a transfer device (5, 6) with connection fittings (15, 16), for example on the tanker truck (19) to at least one transfer pipe (22, 23), for example of the storage tank (20) and whereby the control system forming an electric circuit (3) with a power supply (1, 2) has a liquid level limit value sensor (10) on the storage tank (20) activating the transfer device (5, 6),
   characterized by
   at least one fail-safe safety device connected to the existing liquid level control system (1, 2, 3, 10), which device interrupts the electric circuit (3) of the limit value sensor (10) and the latter switches off the transfer device on the tanker truck (19).
2. Control and safety system for transferring liquid between a tanker truck (19) and an in particular underground storage tank (20) or another tanker truck or between storage tanks, which system has in particular in a dome shaft ('Domschacht') (21) at least one filling pipe (22) and at least one gas displacement pipe (23) and these are connectable through a filling hose (30) and a gas displacement hose (31) on the one side to a transfer device (5, 6) with connection fittings (15, 16), for example of the tanker truck (19), and at the other side to the filling pipe (22) and gas displacement pipe (23), for example of the storage tank (20), whereby the system with at least one power supply (1, 2) of the tanker truck (19) via at least one DC/DC converter (9) forming a potential-free electric circuit (3) has a limit value sensor (10) activating the transfer device (5, 6) with an electronic system (90) which prevents, interrupts or terminates the filling process on attainment of a preset liquid level (11) in the storage tank (20), whereby the electric circuit of the limit value sensor (10) or of its electronic system (90) has switching elements which are connected and designed in such a way that they enable the filling process when the electric circuit is closed and do not enable it or else interrupt it when the electric circuit is interrupted,
   characterized in that
   the electric circuit (3) of the limit value sensor (10) and/or of its switching electronics (90) has at least one additional circuit layout assigned to the filling hose (30) and/or gas displacement hose (31) and/or their fittings (15 through 18) interacting with them directly or by means of mechanically/electrodynamically activable elements (33 through 36), which circuit layout keeps the electric circuit (3) of the limit value sensor (10) closed as long as the filling hose (30) or filling hose (30) and gas displacement hose (31) are connected correctly with their fittings (15 through 18) to the connections (5, 6; 22, 23) at the storage tank side and/or truck side or are not interrupted and interrupts the electric circuit (3) as soon as fittings (15 through 18) or hoses (30, 31) are not correctly connected or hoses (30, 31) are completely or partially torn away.
3. System according to claim 2,
   characterized in that
   the additional circuit layout comprises the following features;

   a line (100) between the plus potential of the power supply (1, 2) of the tanker truck (19) via a DC/DC converter (50) and the filling hose (30) or filler pipe nozzle (5);

   a line (101) between the negative potential of the DC/DC converters (9, 50) and the negative potential of the limit value sensor (10);

   a line (102) connected to the positive potential of the filling pipe (22) with a branching into two line branches (103, 104), branching away from these

   a branch (103) with a relay coil (S2) with switch (C2) and connection to an insulated area of the gas displacement hose (31) or gas displacement pipe (23) located between the insulations (24, 25);

   a branch (104) with selector switch (C3) and connecting line (105) for the positive potential with connection either directly or by switch (C2) to the coil (S1) with switch (C1);

   a connection of the coil (S1) with the line (106) to the positive potential of the electric circuit of the limit value sensor (10), whereby the line is connected via DC/DC converter (9) between the power supply (1, 2) and the switch (C1) and

   the limit value sensor (10) is connected between switch (C1) and via DC/DC converter to the positive potential of the power supply (1) and

   the positive potential of the insulated gas displacement hose (31) is connected via DC/DC converter (9) with the negative potential of the power supply (1, 2) by means of a line (107).
4. System according to claim 2,
   characterized in that
   the selector switch (C3) has at least two positions (pos. 1/pos. 2) for selection of different filling media, for example gasoline or diesel fuel (Fig. 1).
5. System according to claims 1 through 4,
   characterized in that
   in the line (101) via the DC/DC converter (9) between the negative potential of the power supply (1, 2) and the positive potential of the limit value sensor (10) on the one hand a cut-out switch (CM1) assigned to the coupling (17) between the filling pipe (22) and the filling hose (30) and on the other hand, connected in series with the cut-out switch, a cut-out switch (CM2) assigned to the coupling (18) between the gas displacement pipe (23) and the gas displacement hose (31) with both a mechanical and an electrical scanning device (38, 39) for the couplings (17, 18) is interactively positioned, with the scanning devices (38, 39) controlling the correct seating of each coupling (17, 18) and, in the event of a faulty seating, opening the corresponding cut-out switches (CM1) or (CM2) by means of solenoids or coils (M1, M2) and interrupting the electric circuit (3) of the limit value sensor (10), whose electronic system (90) disables or interrupts the filling process.
6. System according to claim 5,
   characterized in that
   the electrical/mechanical scanning device (38, 39) is an electromagnetic switch (44) interacting mechanically with the coupling (17, 18), which switch, in the event of a faulty seating of a coupling (17, 18) or of the magnetic ring (45) or of the electromagnetic switch (44), opens the corresponding cut-out switch (CM1, CM2) and interrupts the electric circuit (3) of the limit value sensor (10).
7. System according to at least one
   of the preceding claims 1 through 6,
   characterized in that
   the positive potential of two DC/DC converters (9) is connected after an insulating part (25) respectively to the electrically conductive filling hose or gas displacement hose (31), which hoses for their part are each connected with the negative potential of the DC/DC converter (9) after an insulating part (24) and mechanical/electrical scanning (38, 39) of the couplings (17, 18) and via reed relays (d11, d12) onto the common ground wire or onto a third line (1') in the connecting cable of the limit value sensor and the third line (1') is connected with the negative potential of the DC/DC converters (9), whereby the reed relays, in the event of the hoses not being properly connected, interrupt the electric circuit of the limit value sensor and thus terminate or do not enable the filling process.
8. System according to at least one
   of the preceding claims 1 through 6,
   characterized in that
   the positive potential of two DC/DC converters (9) is connected after an insulating part (25) respectively to the electrically conductive filling hose (30) or gas displacement hose (31), which hoses for their part are each connected after an insulating part (24) and mechanical/electrical scanning (38, 39) of the couplings (17, 18) and via a common reed relay (d11) onto a third line (1') in the connecting cable of the limit value sensor and the third line (1') is connected with the negative potential of the DC/DC converters (9) and that a reed relay (d10) is located in the electric circuit (9, 30, 1') via the filling hose (30), preferably between DC/DC converter (9) and filling hose (30), which relay is connected into the power supply (2) of the limit value sensor (10) (switch d10), whereby the reed relay (d10) enables the power supply (2) of the limit value sensor (10) if the filling hose (30) is properly connected, or otherwise interrupts it.
9. System according to one or more of claims 1 through 8,
   characterized in that
   in the line (101) via DC/DC converter (9) between the negative potential of the power supply (1, 2) and the positive potential of the limit value sensor (10) at least one interrupt (reed) switch (62, 64) are assigned to the coupling part (52) at the tanker truck connection nozzle (5) and to the coupling part (54) at the filling pipe (22) of the storage tank (20) and at least one interrupt (reed) switch (66, 68) to the coupling part (56) at the tanker truck connection nozzle (6) and to the coupling part (58) at the gas displacement pipe (23) of the storage tank, and one scanning permanent magnet (82, 84 or 86, 88 respectively) each is assigned to the corresponding connection couplings (72, 74) of the filling hose (30) and to the connection couplings (76, 78) of the gas displacement hose (31), that the reed switches (62 through 68) are, where applicable, connected in parallel to one another via auxiliary circuits (131, 132) and are integrated in series into the electric circuit (3) of the limit value sensor (10), and the sensor is closed and the transfer process enabled only when all coupling parts (52 through 58) with connection couplings (72 through 78) have been properly connected.
10. System according to claim 1 or 2,
    characterized in that
    the electric circuit (3) of the limit value sensor (10) and of its electronic system (90) has an additional circuit layout with electro-acoustic accelerating sensors (33, 34) interacting with integrated cut-out switches (35, 36) assigned both to the filling pipe (22) and to the gas displacement pipe (23) in the dome shaft ('Domschacht') (21), and that an electrodynamic sound generator (49) is located at the filling pipe nozzle (5) of the tanker truck (19) and/or as the case may be at the truck-side connection nozzle (6) of the gas displacement hose (31) respectively.
11. System according to claim 10,
    characterized in that
    the accelerating sensors (33, 34) interrupt the electric circuit (3) of the limit value sensor (10).
12. System according to claim 1 or 2
    characterized in that
    a sound generator (49) is located at the truck-side filling nozzle (5) and an electro-acoustic accelerating sensor (48) at the connection nozzle (6) for the gas displacement hose (31) and that same has an interrupt switch (43) integrated into the electric circuit (3) of the limit value sensor (10) and configured interactivably with same.
13. Control and safety system for transferring liquid between a tanker truck (19) and an in particular underground storage tank (20) according to one or more of claims 1 through 12, whereby the storage tank (20) in particular in the dome shaft ('Domschacht') (21) has besides a filling pipe (22) and a gas displacement pipe (23) a guide pipe (12) for a dipstick (13),
    characterized in that
    a fail-safe control device (40) is mounted at the guide pipe (12), which device keeps the electric circuit (3) of the limit value sensor (10) closed when the dipstick (13) is seated and/or locked properly and enables the transfer process and interrupts the electric circuit (3) of the limit value sensor (10) when the dipstick (13) is withdrawn or not seated and/or locked properly and same switches off the transfer process at the tanker truck (19).
14. System according to claim 13,
    characterized in that
    an electro-mechanical scanner (40) mounted at the guide pipe (12), with which scanner, if the dipstick (13) is properly locked by means of a tilting, turning or tilting-and-turning movement or the like, a solenoid (41) located at the head (14) of the dipstick (13) in interaction with an electromagnetic switch (42) mounted at the guide pipe (12) activates same and thereby closes the electric circuit (3) by means of an auxiliary circuit (130) integrated into the electric circuit (3) of the limit value sensor (10), as a result of which the transfer process is enabled.
15. System according to claim 14,
    characterized in that
    the guide pipe (12) is executed in non-conductive material such as plastic and with integrated contacts (131, 132) which interrupt the auxiliary circuit (130) and simultaneously through it the electric circuit (3) of the limit value sensor (10), and that the head (14) of the dipstick (13) is made of electrically conductive material such as brass, through whose conductivity the auxiliariy electric circuit (130) and simultaneously through it the electric circuit (3) is closed and the transfer process enabled if the head of the dipstick (13) is correctly locked.
16. System according to claim 13,
    characterized in that
    the control device (40) for switching the auxiliary circuit (130) on and off has means such as a light barrier or a structure-borne sound generator in interaction with a SETPOINT transmission function stored in the electronic system (90) of the limit value sensor (10).
17. System according to one or more of claims 13 through 16,
    characterized in that
    the auxiliary circuits (130 through 132) are connected in series with the electric circuit (3) of the limit value sensor (10).
18. Control and safety system for transferring liquid between a tanker truck (19) and an in particular underground storage tank (20) or another tanker truck or between storage tanks, whereby in particular in a dome shaft ('Domschacht') (21) at least one filling pipe (22) and at least one gas displacement pipe (23) are present and these pipes are connectable through a filling hose (30) and a gas displacement hose (31) on the one side to a filling device (5, 6) with connection fittings (15, 16), for example of the tanker truck (19) and on the other side to filling pipe (22) and gas displacement pipe (23), for example of the storage tank (20) and at least one power supply (1, 2) of the tanker truck (19) forming a potential-free electric circuit (3) has a limit value sensor (10) activating the transfer device (5, 6) with an electronic system (90) which prevents or interrupts the filling process on attainment of a preset liquid level (11) in the storage tank (20), whereby the electric circuit (3) of the limit value sensor (10) or its electronic system (90) are connected in such a way that they enable the filling process depending on resistance when the electric circuit is closed and do not enable it or else interrupt it when the electric circuit is interrupted,
    characterized in that
    the electric circuit (3) of the limit value sensor (10) and/or its electronic system (90) with at least one additional circuit layout assigned to the filling hose (30) and/or gas displacement hose (31) and/or their fittings (15 through 18) and/or to the dipstick (13) and interacting with them mechanically/electrodynamically directly or indirectly, which circuit layout keeps the electric circuit of the limit value sensor closed as long as the dipstick (13) is properly seated and/or locked and/or as long as the filling hose (30) and/or gas displacement hose (31) are connected correctly with their fittings (15 through 18) to the connections (5, 6; 22, 23) at the storage tank side and/or truck side or are not interrupted and interrupts the electric circuit as soon as fittings (40, 15 through 18) or hoses (30, 31) are not correctly connected or hoses (30, 31) are completely or partially torn away or the dipstick (13) is not properly seated or not locked.
19. Application of the system according to claims 1 through 17 as a control and safety system for transferring liquid, in particular fuels, between a tanker truck (19) and an underground storage tank (20) and in particular for immediate interruption of the transfer process in the event of the filling hose (30) or filling hose (30) and gas displacement hose (31) being fractured and/or not correctly connected or of the dipstick (13) not being correctly seated.
20. Application of the system according to at least one of claims 1 through 17 as a control and safety system for transferring liquid, in particular fuels, between a tanker truck (19) and a storage tank (20) in the case of more than one, in particular underground storage tanks (20, 20' ...), whereby all their filling pipes (22, 22' ...) with pertinent limit value sensor (10, 10' ...) and at least one, as a rule two gas displacement pipes (23, 23') are accommodated in one mutual filling dome ('Fülldom') (21) and whereby the electrical connections of a correctly connected gas displacement hose (31) are connected to all other limit value sensors (10) by reed relays, which are activated by the existing electric circuit, are interrupted if at least one filling pipe of the plurality of filling pipes (22, 22' ...) with pertinent limit value sensor (10. 10' ...) and at least one gas displacement pipe (23, 23') are correctly connected to their filling hose (30) or gas displacement hose (31) respectively and the limit value sensor circuit is closed.
21. Hose connection in a control and safety system for transferring liquid between a tanker truck (19) and an in particular underground storage tank (20) or another tanker truck or between storage tanks, whereby at least one hose (30, 31) is connectable by means of a transfer device (5, 6) with connection fittings (15, 16), for example at the tanker truck (19), to at least one transfer pipe (22, 23), for example of the storage tank (20) and whereby the control system forming with a power supply (1, 2) an electric circuit (3) has at the storage tank (20) a liquid level limit value sensor (10) activating the transfer device (5, 6)
    characterized in that
    in a line (101, 30, 31) via at least one DC/DC converter (9) between the negative potential of the power supply (1, 2) and the positive potential of the limit value sensor (10) at least one interrupt (reed) switch (62, 64) is assigned to the coupling part (52), for example at the tanker truck connection nozzle (5), and to the coupling part (54), for example at the filling pipe (22) of the storage tank (20), and at least one interrupt (reed) switch (66, 68) to the coupling part (56) at the tanker truck connection nozzle (6) and to the coupling part (58) at the gas displacement pipe (23) of the storage tank (20), and one scanning permanent magnet (82, 84 or 86, 88 respectively) each is assigned to the corresponding connection couplings (72, 74) of the filling hose (30) and to the connection couplings (76, 78) of the gas displacement hose (31), that the reed switches (62 through 68) are, where applicable, connected in parallel to one another and are integrated in series into the electric circuit (3) of the limit value sensor (10), and same is closed and the transfer process enabled only when all coupling parts (52 through 58) with connection fittings (72 through 78) have been properly connected or enables the current flow via the connection lines (30, 31) only when all coupling parts (52 through 58) with connection fittings (72 through 78) have been properly connected, whereby the reed relays (d11 and d12) then close the limit value sensor circuit (3), thus enabling the filling process, or alternatively the reed relay (d10) enables or interrupts the power supply of the limit value sensor.
22. Hose connection in an optionally designed control and safety system for transferring liquid between a tanker truck (19) and an in particular underground storage tank (20) or another tanker truck or between storage tanks, whereby at least one hose (30, 31) is connectable by means of a transfer device (5, 6) with connection fittings (15, 16), for example at the tanker truck (19), (and) to at least one transfer pipe (22, 23), for example of the storage tank (20), whereby the connection fittings (15, 16) comprise at least two coupling parts (52, 54, 56, 58) assigned, for example, to the tanker truck (19) and to the transfer pipe (22, 23) and connection fittings (72, 74, 76, 78) assigned to the hose (30, 31),
    characterized in that
    at least one interrupt (reed) switch (62, 64) each is assigned to the coupling part (52) at the tanker truck connection nozzle (5) and/or to the coupling part (54) at the filling pipe (22) of the storage tank (20) and at least one interrupt (reed) switch (66, 68) each to the coupling part (56) at the tanker truck connection nozzle (6) and/or to the coupling part (58) at the gas displacement pipe (23) of the storage tank, and one scanning permanent magnet (82, 84) or (86, 88) respectively each is assigned to the corresponding connection couplings (72, 74) of the filling hose (30) and/or to the connection couplings (76, 78) of the gas displacement hose (31), which magnet is firmly integrated in the respective connection coupling of the pertinent hose (30, 31).

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