EP0134295B1 - Apparatus for preventing overfilling of liquid tanks, especially for liquid tanker trucks - Google Patents

Apparatus for preventing overfilling of liquid tanks, especially for liquid tanker trucks Download PDF

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Publication number
EP0134295B1
EP0134295B1 EP83108895A EP83108895A EP0134295B1 EP 0134295 B1 EP0134295 B1 EP 0134295B1 EP 83108895 A EP83108895 A EP 83108895A EP 83108895 A EP83108895 A EP 83108895A EP 0134295 B1 EP0134295 B1 EP 0134295B1
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EP
European Patent Office
Prior art keywords
containers
liquids
liquid
valve
positions
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Expired
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EP83108895A
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German (de)
French (fr)
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EP0134295A1 (en
Inventor
László Dipl.-Ing. Törocsik
Ferenc Dipl.-Ing. Harangozo
Géza Juranics
Ferenc Hegyi
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Csepel Autogyar
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Csepel Autogyar
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Priority to EP83108895A priority Critical patent/EP0134295B1/en
Priority to DE8383108895T priority patent/DE3369841D1/en
Priority to AT83108895T priority patent/ATE25512T1/en
Publication of EP0134295A1 publication Critical patent/EP0134295A1/en
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Publication of EP0134295B1 publication Critical patent/EP0134295B1/en
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    • 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
    • B67D7/36—Arrangements of flow- or pressure-control valves
    • B67D7/362—Arrangements of flow- or pressure-control valves combined with over-fill preventing means
    • B67D7/365—Arrangements of flow- or pressure-control valves combined with over-fill preventing means using floats
    • B67D7/367—Arrangements of flow- or pressure-control valves combined with over-fill preventing means using floats the float acting pneumatically on a shut-off valve

Definitions

  • the invention relates to a device which automatically prevents overfilling of two liquid containers which can be filled by a common line. It is particularly suitable for liquid transport vehicles of this type, the liquid container of which is divided into two chambers.
  • the invention provides a device which is suitable for preventing the overfilling of two liquid containers which can be filled at the same time via a common filling pipe system with only one common shut-off element, without there being any risk that one of the liquid containers will overflow when it is faster than the other liquid container is filled.
  • the invention therefore relates to a device for automatically preventing overfilling of two liquid containers, in particular for liquid transport vehicles, in which a shut-off element held in the closed position by means of a spring is installed in the filling pipe system of the liquid container, to the opening element of which the piston of a pneumatic working cylinder is connected, which is connected to a compressed air source via a two-position three-way valve, the actuating element of which can be actuated via a sensor element in the respective liquid container, which detects the liquid level, for venting the working cylinder, each of the two liquid containers being equipped with a two-position three-way valve, each of which is equipped with the respective assigned liquid level sensor element is actuated.
  • the device according to the invention is characterized in that the two liquid containers can be filled simultaneously via a common filling pipe system, in which the shut-off element is common to the liquid containers, and in that the two-position three-way valves are connected to one another and to one with the three-way valve designed with positive feedback and with three positions Compressed air source are connected.
  • the container vehicles either two mutually independent containers are provided or the single container 30 is divided into two chambers 31, 32. Although according to the current regulations these cannot be filled at the same time, it is advantageous for the safe design of the vehicle to also provide for the possibility of simultaneously filling the containers 31, 32.
  • the filling of the containers 31 and 32 takes place via the filling line 33 by means of the pump 34, and their emptying by means of the outlet slide 35.
  • the bypass line 20 bypassing the pump 3 is connected to the filling line, in which the flow through the pressure limiting valve 21 is regulated.
  • the shut-off element 4 designed as a slide and held in the closed position by means of a spring 5, is installed in the filling line 33, to the opener element of which the piston of the pneumatic working cylinder 6 is connected.
  • the two-position, three-way valves 9a and 9b are attached to the two containers 31, 32, the connections 10 of which are connected to one another and to the working cylinder 6.
  • the second port 11 of each valve 9a and 9b is over the with positive feedback and three positions executed three-way valve 36 and the downstream rotary valve 12 connected to the compressed air tank 13.
  • the third connection 14 of the valves 9a, 9b is connected to the free atmosphere.
  • two components are arranged in each valve 9a, 9b, namely the shut-off element 15, which is loaded by the spring 16, and the slide 17.
  • the slide is connected to the float 18, which is articulated in the container . When the container is empty, the float is supported on the stop 19.
  • valve 36 In the central position of its valve element 37, the valve 36 releases the flow path of the compressed air both in the direction of the valve 9a and the valve 9b. If the pressure decreases on one side of the valve element 37, the valve element 37 moves according to the positive feedback in the direction of the room with the lower pressure and interrupts the flow path of the compressed air on this side.
  • the shut-off element 4 In order to fill the container, the shut-off element 4 must be opened. This is done by opening the rotary valve 12 so that compressed air flows from the compressed air container 13 via the valve 36 into the valves 9a and 9b.
  • the connections 10 of the valve 9a and the valve 9b are kept open by the floats 18, so that the working cylinder 6 is pressurized and the shut-off element opens. Since the same pressure prevails on both sides of the valve element 37 in this state, the valve element 37 is in the central position.
  • valve 9a or 9b belonging to this chamber is switched over by lifting the float, whereby the slide 17 is lowered and the blocking element 15 down on it Seat slides until the slide 17 clears the way between the connections 10 and 14 to vent the working cylinder 6.
  • the valve of the other chamber used to prevent overflow could not yet switch over, the working cylinder 6 could receive compressed air from this direction. To prevent this, the valve 36 is installed.
  • valve 9b has not yet switched over, so that the flow path of the compressed air through its connection 11 is still free. Accordingly, the compressed air would flow continuously through this valve, so that the working cylinder 6 would be filled in this position, but the system supplying it is already continuously vented through the valve 9a.
  • valve element 37 also blocks the path of the compressed air in the direction of the valve 9b. As a result, the air supply to the working cylinder 6 is finally cut off.
  • the shut-off element 4 is adjusted back into the closed state under the force of the spring 5 and the filling of the container 30 is interrupted.
  • the liquid flows in a circuit via the pressure limiter valve 21 and the bypass line 20.
  • the device can be separated from the compressed air container 13 by closing the rotary valve 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Abstract

1. A device for the automatic prevention of overfilling two containers for liquids (31, 32), particularly such as used for liquid hauling equipment, in which a shutoff element (4), held in the shutting position by a spring (5), is built into the feed pipe system (33) of the containers for liquids (31, 32), the breech mechanism of which is joined to the piston (7) of a pneumatic working cylinder (6) which is connected to a pressure air source (13) via a two positions - three way valve (9a, 9b), the actuating element of which is operated for the venting of the working cylinder (6) via a detecting element (18) sensing the level of the liquid and being situated in the respective container for liquids (31, 32), each of the containers being equipped with a two positions - three way valve (9a, 9b) actuated by the detector element (18), characterized in that the two containers for liquids (31, 32) can simultaniously be filled via a common feed pipe system (33) in which the shutoff element (4) is common for both containers for liquids (31, 32), and that the two positions - three way valves (9a, 9b) are connected with each other and with the pressure air source (13) via a three positions - three way valve (36) with positive feed back control.

Description

Die Erfindung bezieht sich auf eine Vorrichtung, die ein Überfüllen von zwei, durch eine gemeinsame Leitung füllbaren Flüssigkeitsbehältern automatisch verhindert. Sie ist insbesondere bei derartigen Flüssigkeitstransportfahrzeugen geeignet, deren Flüssigkeitsbehälter in zwei Kammern geteilt ist.The invention relates to a device which automatically prevents overfilling of two liquid containers which can be filled by a common line. It is particularly suitable for liquid transport vehicles of this type, the liquid container of which is divided into two chambers.

Bei Flüssigkeitsbehältern, deren Auffüllen durch ein am Behälter angeschlossenes Füllsystem erfolgt, besteht die übliche Forderung zum Verhindern des Überfüllens. Das ist insbesondere beim Einfüllen von brennbaren oder aus anderen Gründen gefährlichen Flüssigkeiten wichtig.In the case of liquid containers, the filling of which is carried out by a filling system connected to the container, the usual requirement is to prevent overfilling. This is particularly important when filling flammable or other dangerous liquids.

Da bei großen Behältern der Aufbau einer mechanischen Verbindung zwischen dem Flüssigkeitstandfühler und dem die Füllöffnung des Behälters verschließenden Absperrelement schwerfällig wäre, wurden elektrische und pneumatische Fernbetätigungssysteme entwickelt. Diese funktionieren im allgemeinen derart, daß der im Behälter angeordnete Flüssigkeitsstandfühler einen elektrischen Schalter oder ein pneumatisches Ventil betätigt, um das Absperrelement der Fülleitung mit Hilfe eines Elektromagneten bzw. Arbeitszylinders in den geschlossenen Zustand zu verstellen.Since it would be cumbersome to set up a mechanical connection between the liquid level sensor and the shut-off element closing the filling opening of the container in large containers, electrical and pneumatic remote control systems were developed. These generally function in such a way that the liquid level sensor arranged in the container actuates an electrical switch or a pneumatic valve in order to adjust the shut-off element of the filling line into the closed state with the aid of an electromagnet or working cylinder.

Aus der US-A-3.771.549 ist eine Vorrichtung mtt den Merkmalen aus dem einleitenden Teil des Patentanspruchs bekannt. Solange der Behälter nicht voll ist, ist die Druckluftquelle über das vom Flüssigkeitsstandfühler betätigbare Zweistellungs-Dreiwegeventil mit dem pneumatischen Arbeitszylinder verbunden, der das im Füllrohrsystem angeordnete - Absperrelement gegen die Kraft seiner Feder im geöffneten Zustand hält. Wenn der Behälter voll ist, schaltet das Zweisteilungs-Dreiwegeventil um und entlüftet den Arbeitszylinder, wodurch die Feder das Absperrelement der Fülleitung in die Schließstellung drückt. Daher wird bei dieser bekannten Vorrichtung ein Füllen oder ein weiteres Füllen des jeweiligen Flüssigkeitsbehälters auch dann verhindert, wenn die Hilfsenergie (in diesem Fall die Druckluft) ausfällt. Die Flüssigkeitstransportbehälter sind - wie bekannt - im allgemeinen in zwei oder mehr getrennte Kammern geteilt. Für einen solchen Fall ist bei der bekannten Vorrichtung für jede der Kammern ein gesondertes Absperrelement vorgesehen.From US-A-3,771,549 a device with the features from the introductory part of the patent claim is known. As long as the container is not full, the compressed air source is connected to the pneumatic working cylinder via the two-position, three-way valve that can be operated by the liquid level sensor, which keeps the shut-off element in the filling pipe system open against the force of its spring. When the container is full, the two-way, three-way valve switches over and bleeds the working cylinder, causing the spring to push the shut-off element of the filling line into the closed position. Therefore, with this known device, filling or further filling of the respective liquid container is prevented even if the auxiliary energy (in this case the compressed air) fails. As is known, the liquid transport containers are generally divided into two or more separate chambers. For such a case, a separate shut-off element is provided for each of the chambers in the known device.

Demgegenüber wird durch die Erfindung eine Vorrichtung geschaffen, die geeignet ist, das Überfüllen von zwei Flüssigkeitsbehältern zu verhindern, die über ein gemeinsames Füllrohrsystem mit nur einem gemeinsamen Absperrelement gleichzeitig gefüllt werden können, ohne daß Gefahr besteht, daß einer der Flüssigkeitsbehälter überläuft, wenn er schneller als der andere Flüssigkeitsbehälter gefüllt wird.In contrast, the invention provides a device which is suitable for preventing the overfilling of two liquid containers which can be filled at the same time via a common filling pipe system with only one common shut-off element, without there being any risk that one of the liquid containers will overflow when it is faster than the other liquid container is filled.

Die Erfindung bezieht sich also auf eine Vorrichtung zum automatischen Verhindern des Überfüllens von zwei Flüssigkeitsbehältern, insbesondere für Flüssigkeitstransportfahrzeuge, bei dem in das Füllrohrsystem der Flüssigkeitsbehälter ein mittels einer Feder in Schließstellung gehaltenes Absperrelement eingebaut ist, an dessen öffnerelement der Kolben eines pneumatischen Arbeitszylinder angeschlossen ist, der an eine Druckluftquelle über ein Zweistellungs-Dreiwegeventil angeschlossen ist, dessen Betätigungselement über ein im jeweiligen Flüssigkeitsbehälter befindliches, den Flüssigkeitsstand wahrnehmendes Fühlerelement zum Entlüften des Arbeitszylinders betätigbar ist, wobei jeder der beiden Flüssigkeitsbehälter mit jeweils einem Zweistellungs-Dreiwegeventil ausgerüstet ist, das über das jeweils zugeordnete Flüssigkeitsstandfühlerelement betätigbar ist. Die erfindungsgemäße Vorrichtung ist dadurch gekennzeichnet, daß die beiden Flüssigkeitsbehälter über ein ihnen gemeinsames Füllrohrsystem gleichzeitig füllbar sind, in welchem das Absperrelement den Flüssigkeitsbehältern gemeinsam ist, und daß die Zweistellungs-Dreiwegeventile über ein mit positiver Rückkopplung und mit drei Stellungen ausgeführtes Dreiwegeventil miteinander und mit der Druckluftquelle verbunden sind.The invention therefore relates to a device for automatically preventing overfilling of two liquid containers, in particular for liquid transport vehicles, in which a shut-off element held in the closed position by means of a spring is installed in the filling pipe system of the liquid container, to the opening element of which the piston of a pneumatic working cylinder is connected, which is connected to a compressed air source via a two-position three-way valve, the actuating element of which can be actuated via a sensor element in the respective liquid container, which detects the liquid level, for venting the working cylinder, each of the two liquid containers being equipped with a two-position three-way valve, each of which is equipped with the respective assigned liquid level sensor element is actuated. The device according to the invention is characterized in that the two liquid containers can be filled simultaneously via a common filling pipe system, in which the shut-off element is common to the liquid containers, and in that the two-position three-way valves are connected to one another and to one with the three-way valve designed with positive feedback and with three positions Compressed air source are connected.

Die Erfindung wird anhand der Zeichnung beschrieben, deren Figur die schematische Darstellung einer zur Verhinderung des Überfüllens eines zweiteiligen Behälters geeigneten Vorrichtung zeigt.The invention is described with reference to the drawing, the figure of which shows the schematic representation of a device suitable for preventing overfilling of a two-part container.

Bei einem Teil der Behälterfahrzeuge sind entweder zwei voneinander unabhängige Behälter vorgesehen oder ist der einzige Behälter 30 in zwei Kammern 31, 32 geteilt. Obwohl nach den derzeitigen Vorschriften diese nicht zugleich gefüllt werden können, ist es zur sicheren Ausgestaltung des Fahrzeuges vorteilhaft, auch für die Möglichkeit eines gleichzeitigen Füllens der Behälter 31, 32 zu sorgen.In some of the container vehicles either two mutually independent containers are provided or the single container 30 is divided into two chambers 31, 32. Although according to the current regulations these cannot be filled at the same time, it is advantageous for the safe design of the vehicle to also provide for the possibility of simultaneously filling the containers 31, 32.

Die für diesen Fall gestaltete Vorrichtung ist aus der Figur ersichtlich, wobei der Einfachheit halber die die beiden Behälter 31, 32 voneinander unabhängig machenden Bauelemente nicht dargestellt sind.The device designed for this case can be seen from the figure, for the sake of simplicity the components which make the two containers 31, 32 independent of one another are not shown.

Das Füllen der Behälter 31 und 32 erfolgt über die Fülleitung 33 mittels der Pumpe 34, und ihr Entleeren mittels des Auslaufschiebers 35. Zur Sicherung der Füllpumpe 34 ist an die Fülleitung die die Pumpe 3 umgehende Umgehungsleitung 20 angeschlossen, in der die Strömung durch das Druckbegrenzerventil 21 geregelt wird.The filling of the containers 31 and 32 takes place via the filling line 33 by means of the pump 34, and their emptying by means of the outlet slide 35. To secure the filling pump 34, the bypass line 20 bypassing the pump 3 is connected to the filling line, in which the flow through the pressure limiting valve 21 is regulated.

In die Fülleitung 33 ist das mittels einer Feder 5 in der Schließstellung gehaltene, als Schieber ausgebildete Absperrelement 4 eingebaut, an dessen Öffnerelement der Kolben des pneumatischen Arbeitszylinders 6 angeschlossen ist.The shut-off element 4, designed as a slide and held in the closed position by means of a spring 5, is installed in the filling line 33, to the opener element of which the piston of the pneumatic working cylinder 6 is connected.

An die beiden Behälter 31, 32 sind die durch je einen Schwimmer betätigten Zweistellungs-Dreiwegeventile 9a und 9b angebaut, deren Anschlüsse 10 miteinander und mit dem Arbeitszylinder 6 verbunden sind. Der zweite Anschluß 11 jedes Ventils 9a und 9b ist über das mit positiver Rückkopplung und drei Stellungen ausgeführte Dreiwegeventil 36 und das diesem nachgeschaltete Drehventil 12 an den Druckluftbehälter 13 angeschlossen. Der dritte Anschluß 14 der Ventile 9a, 9b ist mit der freien Atmosphäre verbunden. Zur Regelung des Strömungsweges der Luft sind in jedem Ventil 9a, 9b zwei Bauelemente angeordnet und zwar das Absperrelement 15, das durch die Feder 16 belastet wird, und der Schieber 17. Der Schieber ist an den Schwimmer 18 angeschlossen, der im Behälter gelenkig befestigt ist. In leerem Zustand des Behälters ist der Schwimmer auf dem Anschlag 19 abgestützt.The two-position, three-way valves 9a and 9b, each operated by a float, are attached to the two containers 31, 32, the connections 10 of which are connected to one another and to the working cylinder 6. The second port 11 of each valve 9a and 9b is over the with positive feedback and three positions executed three-way valve 36 and the downstream rotary valve 12 connected to the compressed air tank 13. The third connection 14 of the valves 9a, 9b is connected to the free atmosphere. To regulate the flow path of the air, two components are arranged in each valve 9a, 9b, namely the shut-off element 15, which is loaded by the spring 16, and the slide 17. The slide is connected to the float 18, which is articulated in the container . When the container is empty, the float is supported on the stop 19.

Das Ventil 36 gibt in der Mittelstellung seines Ventilelementes 37 den Strömungsweg der Druckluft sowohl in Richtung zu dem Ventil 9a als auch zu dem Ventil 9b frei. Geht an einer Seite des Ventilelementes 37 der Druck zurück, so bewegt sich das Ventilelement 37 der positiven Rückkopplung entsprechend in Richtung des Raumes mit dem niedrigeren Druck und unterbricht auf dieser Seite den Strömungsweg der Druckluft.In the central position of its valve element 37, the valve 36 releases the flow path of the compressed air both in the direction of the valve 9a and the valve 9b. If the pressure decreases on one side of the valve element 37, the valve element 37 moves according to the positive feedback in the direction of the room with the lower pressure and interrupts the flow path of the compressed air on this side.

Das Füllen der Behälter folgt in nachstehender Weise:

  • Sind die Behälter 31,32 nicht oder nicht vollständig aufgefüllt, liegt der Schwimmer 18 auf dem Antrag 19 auf, so daß der Schieber 17 den Entlüftungsanschluß 14 des Ventils 9a, 9b geschlossen und durch Anheben des Sperrelementes 15 gegen die Kraft der Feder 16 den Strömungsweg zwischen den beiden anderen Ausschlüssen 11 und 10 des Ventils 9a, 9b offen hält.
The containers are filled in the following way:
  • If the containers 31, 32 are not or not completely filled, the float 18 rests on the application 19, so that the slide 17 closes the vent connection 14 of the valve 9a, 9b and, by lifting the blocking element 15 against the force of the spring 16, the flow path holds open between the two other exclusions 11 and 10 of the valve 9a, 9b.

Im Ruhezustand ist das Drehventil 12 geschlossen, so daß aus dem Druckluftbehälter 13 zu den Ventilen 9a und 9b und demzufolge auch zum Arbeitszylinder 6 keine Druckluft gelangen kann. Daher hält die Feder 5 das Absperrelement 4 in der Schließstellung.In the idle state, the rotary valve 12 is closed, so that no compressed air can get from the compressed air container 13 to the valves 9a and 9b and consequently also to the working cylinder 6. Therefore, the spring 5 holds the shut-off element 4 in the closed position.

Um die Behälter füllen zu können, muß das Absperrelement 4 geöffnet werden. Dies erfolgt durch Öffnen des Drehventils 12, so daß Druckluft aus dem Druckluftbehälter 13 über das Ventil 36 in die Ventile 9a und 9b strömt. Bei leerem oder nicht voll aufgefülltem Behälter werden die Anschlüsse 10 des Ventils 9a und des Ventils 9b durch die Schwimmer 18 offengehalten, so daß der Arbeitszylinder 6 unter Druck gesetzt wird und das Absperrelement öffnet. Da in diesem Zustand auf beiden Seiten des Ventilelementes 37 der gleiche Druck herrscht, steht das Ventilelement 37 in der Mittelstellung.In order to fill the container, the shut-off element 4 must be opened. This is done by opening the rotary valve 12 so that compressed air flows from the compressed air container 13 via the valve 36 into the valves 9a and 9b. When the container is empty or not completely filled, the connections 10 of the valve 9a and the valve 9b are kept open by the floats 18, so that the working cylinder 6 is pressurized and the shut-off element opens. Since the same pressure prevails on both sides of the valve element 37 in this state, the valve element 37 is in the central position.

Mit dem Einschalten der Pumpe 34 beginnt das Auffüllen.When the pump 34 is switched on, the filling begins.

Nähert sich im Behälter in der einen der Kammern 31, 32 die Flüssigkeit dem zulässigen Flüssigkeitsstand, so wird das zu dieser Kammer gehörende Ventil 9a bzw. 9b durch Anheben des Schwimmers umgeschaltet, wobei der Schieber 17 abgesenkt wird und das Sperrelement 15 nach unten auf dessen Sitz gleiten läßt, bis der Schieber 17 den Weg zwischen den Anschlüssen 10 und 14 freigibt, um den Arbeitszylinder 6 zu entlüften. Falls jedoch das zum Verhindern des Überlaufens dienende Ventil der anderen Kammer noch nicht umschalten konnte, könnte der Arbeitszylinder 6 aus dieser Richtung Druckluft erhalten. Zur Verhinderung dessen ist das Ventil 36 eingebaut.If the liquid in the container in one of the chambers 31, 32 approaches the permissible liquid level, the valve 9a or 9b belonging to this chamber is switched over by lifting the float, whereby the slide 17 is lowered and the blocking element 15 down on it Seat slides until the slide 17 clears the way between the connections 10 and 14 to vent the working cylinder 6. However, if the valve of the other chamber used to prevent overflow could not yet switch over, the working cylinder 6 could receive compressed air from this direction. To prevent this, the valve 36 is installed.

Hat z.B. das Ventil 9a bereits umgeschaltet und würde demgemäß den Arbeitszylinder 6 entlüften, ohne daß jedoch das Ventil 9b hierbei bereits umgeschaltet hat, ergibt sich folgende Situation:

  • In dem Ventil 9a ist der Strömungsweg der Druckluft in Richtung zu seinem Anschluß 11 bereits verschlossen, so daß in dieser Richtung keine Druckluft aus dem Druckluftbehälter 13 strömen kann.
For example, if the valve 9a has already switched over and would accordingly vent the working cylinder 6 without the valve 9b already having switched over here, the following situation arises:
  • The flow path of the compressed air in the direction of its connection 11 is already closed in the valve 9a, so that no compressed air can flow out of the compressed air container 13 in this direction.

Das Ventil 9b hat noch nicht umgeschaltet, so daß der Strömungsweg der Druckluft durch seinen Anschluß 11 noch frei ist. Durch dieses Ventil würde demgemäß die Druckluft ununterbrochen strömen, so daß in dieser Stellung der Arbeitszylinder 6 gefüllt werden würde, wobei jedoch das diesen versorgende System durch das Ventil 9a bereits kontinuierlich entlüftet wird.The valve 9b has not yet switched over, so that the flow path of the compressed air through its connection 11 is still free. Accordingly, the compressed air would flow continuously through this valve, so that the working cylinder 6 would be filled in this position, but the system supplying it is already continuously vented through the valve 9a.

Da an dem dem Ventil 9a zugeordneten Anschluß des Ventilelementes 37 des Ventils 36 keine Druckluft strömt, was jedoch an dem dem Ventil 9b zugeorneten Anschluß der Fall ist, ist der Druck an diesem letzteren Anschluß geringer.Since no compressed air flows at the connection of the valve element 37 of the valve 36 assigned to the valve 9a, but this is the case at the connection assigned to the valve 9b, the pressure at this latter connection is lower.

Sich in dieser Richtung verschiebend, sperrt das Ventilelement 37 den Weg der Druckluft auch in Richtung zum Ventil 9b ab. Dadurch wird die Luftversorgung des Arbeitszylinders 6 endgültig unterbunden. Das Absperrelement 4 wird unter der Kraft der Feder 5 wieder in den geschlossenen Zustand verstellt und das Füllen des Behälters 30 wird unterbrochen.Moving in this direction, the valve element 37 also blocks the path of the compressed air in the direction of the valve 9b. As a result, the air supply to the working cylinder 6 is finally cut off. The shut-off element 4 is adjusted back into the closed state under the force of the spring 5 and the filling of the container 30 is interrupted.

Bis zum Abstellen der Pumpe 34 strömt die Flüssigkeit über das Druckbegrenzerventil 21 und die Umgehungsleitung 20 im Kreislauf. Nach Abstellen der Pumpe 34 ist die Vorrichtung durch Abschließen des Drehventils 12 vom Druckluftbehälter 13 abzutrennen.Until the pump 34 is switched off, the liquid flows in a circuit via the pressure limiter valve 21 and the bypass line 20. After the pump 34 has been switched off, the device can be separated from the compressed air container 13 by closing the rotary valve 12.

Beim Entleeren des Behälters 31 sinkt mit dem Rückgang des Flüssigkeitsstandes der Schwimmer 18 auf den Anschlag 13 zurück und mit dem Umschalten des Ventils 9a, 9b ist die Vorrichtung zur Verhinderung des Überlaufens erneut zu der zum Füllen erforderlichen Betätigung bereit.When the container 31 is emptied, the float 18 sinks back to the stop 13 as the liquid level drops and when the valve 9a, 9b is switched over, the overflow prevention device is again ready for the actuation required for filling.

Claims (1)

  1. A device for the automatic prevention of overfilling two containers for liquids (31,32), particulary such as used for liquid hauling equipment, in which a shutoff element (4), held in the shutting position by a spring (5), is built into the feed pipe system (33) of the containers for liquids (31, 32), the breech mechanism of which is joined to the piston (7) of a pneumatic working cylinder (6) which is connected to a pressure air source (13) via a two positons - three way valve (9a, 9b), the actuating element of which is operated for the venting of the working cylinder (6) via a detecting element (18) sensing the level of the liquid and being situated in the respective container for liquids (31, 32), each of the containers beeing equipped with a two positions - three way valve (9a, 9b) actuated by the detector element (18), characterized in that the two containers for liquids (31, 32) can simultaniously be filled via a common feed pipe system (33) in which the shutoff element (4) is common for both containers for liquids (31, 32), and that the two positions - three way valves (9a, 9b) are connected with each other and with the pressure air source (13) via a three positions - three way valve (36) with positive feed back control.
EP83108895A 1983-09-08 1983-09-08 Apparatus for preventing overfilling of liquid tanks, especially for liquid tanker trucks Expired EP0134295B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP83108895A EP0134295B1 (en) 1983-09-08 1983-09-08 Apparatus for preventing overfilling of liquid tanks, especially for liquid tanker trucks
DE8383108895T DE3369841D1 (en) 1983-09-08 1983-09-08 Apparatus for preventing overfilling of liquid tanks, especially for liquid tanker trucks
AT83108895T ATE25512T1 (en) 1983-09-08 1983-09-08 DEVICE FOR PREVENTING LIQUID CONTAINERS FROM OVERFILLING, ESPECIALLY FOR LIQUID TRANSPORT VEHICLES.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83108895A EP0134295B1 (en) 1983-09-08 1983-09-08 Apparatus for preventing overfilling of liquid tanks, especially for liquid tanker trucks

Publications (2)

Publication Number Publication Date
EP0134295A1 EP0134295A1 (en) 1985-03-20
EP0134295B1 true EP0134295B1 (en) 1987-02-25

Family

ID=8190671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108895A Expired EP0134295B1 (en) 1983-09-08 1983-09-08 Apparatus for preventing overfilling of liquid tanks, especially for liquid tanker trucks

Country Status (3)

Country Link
EP (1) EP0134295B1 (en)
AT (1) ATE25512T1 (en)
DE (1) DE3369841D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008157A1 (en) * 1990-03-15 1990-10-25 W Dietmar Richter Automatic volume filling system for explosive liquids - uses pneumatic components and differing pneumatic pressure relationships in pipeline and pneumatic or hydraulic servo-energy

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678658A (en) * 1950-11-02 1954-05-18 Bowser Inc Tank filling apparatus
US3771549A (en) * 1971-10-21 1973-11-13 Dover Corp System for loading and unloading a container at its bottom

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008157A1 (en) * 1990-03-15 1990-10-25 W Dietmar Richter Automatic volume filling system for explosive liquids - uses pneumatic components and differing pneumatic pressure relationships in pipeline and pneumatic or hydraulic servo-energy

Also Published As

Publication number Publication date
ATE25512T1 (en) 1987-03-15
DE3369841D1 (en) 1987-04-02
EP0134295A1 (en) 1985-03-20

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