EP0353547B1 - Gulley emptying vehicule for removal of sludge and liquid - Google Patents

Gulley emptying vehicule for removal of sludge and liquid Download PDF

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Publication number
EP0353547B1
EP0353547B1 EP89113290A EP89113290A EP0353547B1 EP 0353547 B1 EP0353547 B1 EP 0353547B1 EP 89113290 A EP89113290 A EP 89113290A EP 89113290 A EP89113290 A EP 89113290A EP 0353547 B1 EP0353547 B1 EP 0353547B1
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EP
European Patent Office
Prior art keywords
suction
vacuum pump
pump
chamber
emptying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89113290A
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German (de)
French (fr)
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EP0353547A1 (en
Inventor
Jürgen Dipl.-Ing. Schatt
David Alan Dipl.-Ing. Roberts
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Siemens AG
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Siemens AG
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Publication date
Priority claimed from DE19883826140 external-priority patent/DE3826140A1/en
Priority claimed from DE8809800U external-priority patent/DE8809800U1/de
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT89113290T priority Critical patent/ATE81536T1/en
Publication of EP0353547A1 publication Critical patent/EP0353547A1/en
Application granted granted Critical
Publication of EP0353547B1 publication Critical patent/EP0353547B1/en
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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
    • E03F7/10—Wheeled apparatus for emptying sewers or cesspools
    • E03F7/103—Wheeled apparatus for emptying sewers or cesspools with a tank featuring one or more partition walls
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
    • E03F7/10—Wheeled apparatus for emptying sewers or cesspools

Definitions

  • the invention relates to a suction truck for the disposal of sludge and liquids.
  • suction vehicles are generally known, see in particular DE-U-87 03019.
  • the receptacle is subdivided into a suction and a pressure space by a clearing piston arranged displaceably in the container.
  • the suction and pressure chambers are connected via pipes to a vacuum pump, which is used both for generating a negative pressure and for generating an excess pressure.
  • the suction or pressure chamber can be connected to the vacuum pump by means of check valves arranged in the pipelines leading to the suction and pressure chamber, which must be opened or closed depending on the operating mode.
  • a separate compensating line is provided which opens into the pressure chamber bypassing the corresponding shut-off valve.
  • filling mode both the suction and the pressure chamber are pressurized via the pipes.
  • draining mode only the pressure chamber is pressurized.
  • corresponding valves When switching from one operating mode to the other, corresponding valves must be operated in the known case.
  • the arrangement of the valves means a corresponding outlay on equipment for the suction vehicle.
  • suction vehicles are known, for example, from DIN 30 705, Part 1, in which sludge or liquids are sucked in by means of a vacuum pump which draws air in through the receptacle.
  • a vacuum pump which draws air in through the receptacle.
  • sludge or liquid is sucked into the receptacle via a suction pipe connected to the receptacle.
  • air is pressed into it by the vacuum pump and thereby the sludge or the liquid through one on the receptacle provided the proposed drain port back to the outside.
  • a four-way valve is provided in these known sludge wagons, through which either the inlet or the outlet of the vacuum pump is connected to the receptacle.
  • the arrangement of such a four-way valve also requires appropriate piping between the vacuum pump and the valve.
  • the invention has for its object to design suction vehicles of the type described above so that switching between the different operating modes is significantly simplified.
  • a non-return valve is provided in the pipeline leading to the suction chamber in a suction truck with a receptacle divided into a suction and pressure chamber. Since a check valve locks or opens automatically depending on the direction of flow, there is no need to specifically operate this blocking element. It only has to be switched on the vacuum pump from suction to pressure mode or from pressure to suction mode. The direct connection of the vacuum pump to the pressure chamber also makes the separate compensation line unnecessary. This not only results in simple operation of the vacuum truck, but also active and passive components are eliminated.
  • a further solution to the object is achieved according to the invention in that a vacuum pump that can be operated in both directions of rotation is provided, the direction of rotation of which is switched over for filling and emptying the receptacle. This is the mechanical reversal of the The direction of air flow is no longer necessary, making a four-way valve superfluous. At the same time, the complex piping is also eliminated.
  • Pumps according to claims 3 to 9 can be provided as vacuum pumps operable in both directions of rotation.
  • the gas ring pump is the most suitable of the pumps mentioned above. It can be easily switched from one direction of rotation to the other. The delivery rate and the compression ratio decrease when the gas ring pump is operated in the opposite direction of rotation due to its design; since the performance requirements for the vacuum pump when emptying the sludge container are lower than when filling, the reduced output of a gas ring pump operated in the opposite direction is still completely sufficient for the emptying process.
  • a suction pipe 5 is connected to the receptacle 1 through which sludge or liquid can be sucked into the suction chamber 3.
  • an emptying nozzle 6 is provided on the receptacle 1.
  • a vacuum pump 7 assigned to the suction vehicle is connected with its suction and pressure ports 8 and 9 to two connections 11 and 12 of a four-way valve 10.
  • one connection 13 is connected to a main pipeline 15 leading to the suction vehicle and the other connection 14 is connected to a pipe socket 16 opening into the atmosphere.
  • the main pipeline 15 is divided into a first and a second pipe section 17 and 18, the first of which opens into the pressure chamber 4 via a pressure inlet 24 and the second opens into the suction chamber 3 via a suction inlet 25.
  • a check valve 19 or 20 is provided in each of the first and second pipe sections 17 and 18.
  • the main pipe 15 is connected to the suction port 8 of the vacuum pump 7 via the four-way valve 10.
  • the check valve 19 of the first pipe section 17 must be closed and the check valve 20 of the second pipe section 18 must be opened. Air is thus sucked in by the vacuum pump 7 from the suction chamber 3, so that 5 sludge or liquid can be sucked into the suction chamber 3 of the receptacle 1 via the suction pipe.
  • the clearing piston 2 moves towards the pressure chamber 4.
  • the pressure chamber 4 is kept at the same pressure as the suction chamber 3 via the compensating tube 21.
  • the flow direction of the air in the main pipeline 15 must be switched via the four-way valve 10.
  • the main pipeline 15 is now connected to the pressure port 9 of the vacuum pump 7.
  • the check valve 20 of the second pipe section 18 is closed and the check valve 19 of the first pipe section 17 is opened.
  • Air is now conveyed into the pressure chamber 4 by the vacuum pump 7 and the pressure which builds up thereby moves the clearing piston 2 against the filling in the suction chamber 3 of the receptacle 1.
  • the contents of the suction chamber 3 are emptied again via the opened discharge nozzle 6.
  • a check valve 22 is arranged in the suction vehicle according to the invention according to FIG. 2 in the second pipe section 18 opening into the suction chamber 3. with an air flow directed towards the suction space 3, blocks.
  • the air conveyed from the vacuum pump 7 to the suction vehicle cannot get into the suction space 3 of the receptacle 1, but flows through the non-lockable first pipe section 17 into the pressure space 4 of the receptacle 1. Due to the pressure build-up in the pressure space 4, the clearing piston 2 - as already described - shifted accordingly and the suction chamber 3 emptied.
  • the main pipeline 15 is connected again to the suction port 8 of the vacuum pump 7 by means of the four-way valve 10. Air can now be sucked in from the suction chamber 3 by the vacuum pump 7, since the check valve 22 automatically goes into its open position and thus clears the suction path. Via the unblocked first pipe section 17, the same pressure as in the suction chamber 3 is generated in the pressure chamber 4, so that no separate compensating line is required.
  • a gas ring pump 26 that can be operated in both directions of rotation is provided as the vacuum pump.
  • the direction of rotation of such a gas ring pump 26 also reverses its direction of delivery. There is therefore no longer any need for a mechanically switchable four-way valve in order to apply suction air and compressed air to the receptacle 1 once. With the four-way valve, there is also no piping for connecting this valve to the vacuum pump.
  • the main pipeline 15 is connected to the connecting piece, which acts as a suction port 27 in the direction of rotation corresponding to the design of the gas ring pump 26.
  • the other connecting piece which acts as a pressure port 28 in this direction of rotation, opens into the atmosphere.
  • the gas ring pump 26 When filling the receptacle 1, the gas ring pump 26 is operated in the direction of rotation corresponding to its design. So that the gas ring pump 26 sucks air from the receptacle 1, so that sludge and liquid are sucked in through the suction pipe 5 of the receptacle 1. If the receptacle 1 is filled, the gas ring pump 26 is now switched over in its direction of rotation for emptying the same. This also reverses their direction of funding. The gas ring pump 26 now sucks air from the atmosphere via its actual pressure port 28 and presses it via its actual suction port 27 into the main pipeline 15 and from there via the pipe section 17 and the pressure inlet 24 into the Pressure chamber 4 of the receptacle 1. The check valve 20 assigned to the suction inlet 25 and arranged in the pipe section 18 is previously closed and the check valve 19 assigned to the pressure inlet 24 and arranged in the pipe section 17 is opened accordingly.
  • the clearing piston 2 Due to the pressure building up in the pressure chamber 4 of the receptacle 1, the clearing piston 2 is pressed against the filling into the suction chamber 3 of the receptacle 1 and urges it outwards again via the opened discharge nozzle 6.

Description

Die Erfindung betrifft einen Saugwagen zum Entsorgen von Schlämmen und Flüssigkeiten.The invention relates to a suction truck for the disposal of sludge and liquids.

Derartige Saugwagen sind allgemein bekannt, siehe insbesondere DE-U-87 03019. Der Aufnahmebehälter ist bei einem solchen Saugwagen durch einen im Behälter verschiebbar angeordneten Räumkolben in einen Saug- und einen Druckraum unterteilt. Über Rohrleitungen sind der Saug- und der Druckraum mit einer Vakuumpumpe verbunden, die sowohl zum Erzeugen eines Unterdruckes als auch zum Erzeugen eines Überdruckes verwendet wird. Durch in den zum Saug- und Druckraum führenden Rohrleitungen angeordnete Sperrventile, die je nach Betriebsart geöffnet oder geschlossen werden müssen, kann der Saug- oder Druckraum mit der Vakuumpumpe verbunden werden. Da der Druckraum während des Füllbetriebes auf gleichem Druck wie der Saugraum gehalten werden muß, damit die Bewegung des Räumkolbens nicht behindert wird, ist eine gesonderte Ausgleichsleitung vorgesehen, die unter Umgehung des entsprechenden Sperrventiles in den Druckraum mündet. Im Füllbetrieb wird also sowohl der Saug- als auch der Druckraum über die Rohrleitungen mit Unterdruck beaufschlagt. Im Entleerungsbetrieb wird nur der Druckraum mit Überdruck beaufschlagt. Beim Umstellen von der einen Betriebsart auf die andere müssen im bekannten Fall entsprechende Ventile betätigt werden. Außerdem bedeutet die Anordnung der Ventile einen entsprechenden Ausstattungsaufwand für den Saugwagen.Such suction vehicles are generally known, see in particular DE-U-87 03019. In such a suction vehicle, the receptacle is subdivided into a suction and a pressure space by a clearing piston arranged displaceably in the container. The suction and pressure chambers are connected via pipes to a vacuum pump, which is used both for generating a negative pressure and for generating an excess pressure. The suction or pressure chamber can be connected to the vacuum pump by means of check valves arranged in the pipelines leading to the suction and pressure chamber, which must be opened or closed depending on the operating mode. Since the pressure chamber must be kept at the same pressure as the suction chamber during the filling operation so that the movement of the clearing piston is not hindered, a separate compensating line is provided which opens into the pressure chamber bypassing the corresponding shut-off valve. In filling mode, both the suction and the pressure chamber are pressurized via the pipes. In the draining mode, only the pressure chamber is pressurized. When switching from one operating mode to the other, corresponding valves must be operated in the known case. In addition, the arrangement of the valves means a corresponding outlay on equipment for the suction vehicle.

Ferner sind Saugwagen z.B. durch DIN 30 705, Teil 1, bekannt, bei denen das Ansaugen von Schlämmen oder Flüssigkeiten mittels einer Vakuumpumpe erfolgt, die Luft über den Aufnahmebehälter ansaugt. Dadurch wird über ein an den Aufnahmebehälter angeschlossenes Saugrohr Schlamm oder Flüssigkeit in den Aufnahmebehälter eingesaugt. Zum Entleeren des Aufnahmebehälters wird durch die Vakuumpumpe Luft in diesen hineingedrückt und dadurch der Schlamm bzw. die Flüssigkeit durch einen am Aufnahmebehälter vorgesehenen Entleerungsstutzen wieder nach außen gefördert. Um mittels der Vakuumpumpe Luft in den Aufnahmebehälter fördern zu können, ist bei diesen bekannten Schlammwagen ein Vierwegeventil vorgesehen, durch das entweder der Einlaß oder der Auslaß der Vakuumpumpe an den Aufnahmebehälter angeschlossen wird. Die Anordnung eines solchen Vierwegeventiles erfordert außerdem eine entsprechende Verrohrung zwischen der Vakuumpumpe und dem Ventil.Furthermore, suction vehicles are known, for example, from DIN 30 705, Part 1, in which sludge or liquids are sucked in by means of a vacuum pump which draws air in through the receptacle. As a result, sludge or liquid is sucked into the receptacle via a suction pipe connected to the receptacle. To empty the receptacle, air is pressed into it by the vacuum pump and thereby the sludge or the liquid through one on the receptacle provided the proposed drain port back to the outside. In order to be able to convey air into the receptacle by means of the vacuum pump, a four-way valve is provided in these known sludge wagons, through which either the inlet or the outlet of the vacuum pump is connected to the receptacle. The arrangement of such a four-way valve also requires appropriate piping between the vacuum pump and the valve.

Der Erfindung liegt die Aufgabe zugrunde, Saugwagen der eingangs beschriebenen Art so auszubilden, daß das Umschalten zwischen den verschiedenen Betriebsarten wesentlich vereinfacht ist.The invention has for its object to design suction vehicles of the type described above so that switching between the different operating modes is significantly simplified.

Die Aufgabe wird erfindungsgemäß durch die im Anspruch 1 angegebenen Merkmale gelöst. Eine weitere Lösung der Aufgabe besteht in den im Anspruch 2 angegebenen Merkmalen.The object is achieved by the features specified in claim 1. Another solution to the problem consists in the features specified in claim 2.

Nach Anspruch 1 ist bei einem Saugwagen mit einem in einen Saug- und Druckraum unterteilten Aufnahmebehältnis erfindungsgemäß ein Rückschlagventil in der zum Saugraum führenden Rohrleitung vorgesehen. Da ein Rückschlagventil in Abhängigkeit von der Strömungsrichtung selbsttätig sperrt bzw. öffnet, entfällt ein gezieltes Betätigen dieses Sperrorganes. Es muß lediglich an der Vakuumpumpe von Saug- auf Druckbetrieb bzw. von Druck- auf Saugbetrieb umgestellt werden. Die direkte Verbindung der Vakuumpumpe mit dem Druckraum macht außerdem die gesonderte Ausgleichsleitung überflüssig. Somit ergibt sich nicht nur eine einfache Bedienungsweise des Saugwagens, sondern es kommen auch aktive und passive Bauteile in Fortfall.According to claim 1, a non-return valve is provided in the pipeline leading to the suction chamber in a suction truck with a receptacle divided into a suction and pressure chamber. Since a check valve locks or opens automatically depending on the direction of flow, there is no need to specifically operate this blocking element. It only has to be switched on the vacuum pump from suction to pressure mode or from pressure to suction mode. The direct connection of the vacuum pump to the pressure chamber also makes the separate compensation line unnecessary. This not only results in simple operation of the vacuum truck, but also active and passive components are eliminated.

Eine weitere Lösung der gestellten Aufgabe gelingt erfindungsgemäß nach Anspruch 2 dadurch, daß eine in beiden Drehrichtungen betreibbare Vakuumpumpe vorgesehen ist, deren Drehrichtung zum Füllen und Entleeren des Aufnahmebehälters jeweils umgeschaltet ist. Damit ist die mechanische Umsteuerung der Strömungsrichtung der Luft nicht mehr notwendig und somit ein Vierwegeventil überflüssig. Gleichzeitig entfällt auch die aufwendige Verrohrung.A further solution to the object is achieved according to the invention in that a vacuum pump that can be operated in both directions of rotation is provided, the direction of rotation of which is switched over for filling and emptying the receptacle. This is the mechanical reversal of the The direction of air flow is no longer necessary, making a four-way valve superfluous. At the same time, the complex piping is also eliminated.

Vorteilhafte Ausgestaltungen der Erfindung nach Anspruch 2 sind in den Unteransprüchen beschrieben.Advantageous embodiments of the invention according to claim 2 are described in the subclaims.

Als in beiden Drehrichtungen betreibbare Vakuumpumpen können Pumpen gemäß der Ansprüche 3 bis 9 vorgesehen sein.Pumps according to claims 3 to 9 can be provided as vacuum pumps operable in both directions of rotation.

Von den vorgenannten Pumpen eignet sich die Gasringpumpe am besten. Sie kann problemlos von der einen in die andere Drehrichtung umgeschaltet werden. Zwar sinkt die Förderleistung und auch das Verdichtungsverhältnis, wenn die Gasringpumpe in der von ihrer Konstruktion her entgegengesetzten Drehrichtung betrieben wird; da die Leistungsanforderungen an die Vakuumpumpe beim Entleeren des Schlammbehälters geringer sind als beim Füllen, reicht die reduzierte Leistung einer in der entgegengesetzten Richtung betriebenen Gasringpumpe noch vollkommen für den Entleerungsvorgang aus.The gas ring pump is the most suitable of the pumps mentioned above. It can be easily switched from one direction of rotation to the other. The delivery rate and the compression ratio decrease when the gas ring pump is operated in the opposite direction of rotation due to its design; since the performance requirements for the vacuum pump when emptying the sludge container are lower than when filling, the reduced output of a gas ring pump operated in the opposite direction is still completely sufficient for the emptying process.

Anhand in der Zeichnung dargestellter Ausführungsbeispiele wird die Erfindung nachfolgend näher beschrieben. Es zeigt:

  • Fig. 1 in schematischer Darstellung einen Saugwagen nach dem Stand der Technik,
  • Fig. 2 in schematischer Darstellung einen erfindungsgemäßen Saugwagen nach Anspruch 1,
  • Fig. 3 in schematischer Darstellung einen erfindungsgemäßen Saugwagen nach Anspruch 2.
The invention is described in more detail below with reference to exemplary embodiments shown in the drawing. It shows:
  • 1 is a schematic representation of a vacuum truck according to the prior art,
  • 2 is a schematic representation of a suction truck according to the invention according to claim 1,
  • 3 shows a schematic representation of a suction truck according to the invention according to claim 2.

Mit 1 ist der Aufnahmebehälter eines Saugwagens bezeichnet, der durch einen verschiebbar angeordneten Räumkolben 2 in einen Saugraum 3 und einen Druckraum 4 unterteilt ist. Über einen Schieber 23 ist ein Saugrohr 5 an dem Aufnahmebehälter 1 angeschlossen, durch das Schlamm oder Flüssigkeit in den Saugraum 3 eingesaugt werden kann. Zum Entleeren des Saugraumes 3 ist ein Entleerungsstutzen 6 an dem Aufnahmebehälter 1 vorgesehen.1 with the receptacle of a suction truck is designated, which is divided by a displaceably arranged clearing piston 2 into a suction chamber 3 and a pressure chamber 4. About one Slider 23, a suction pipe 5 is connected to the receptacle 1 through which sludge or liquid can be sucked into the suction chamber 3. For emptying the suction chamber 3, an emptying nozzle 6 is provided on the receptacle 1.

Eine dem Saugwagen zugeordnete Vakuumpumpe 7 ist mit ihren Saug- und Druckstutzen 8 und 9 mit zwei Anschlüssen 11 und 12 eines Vierwegeventiles 10 verbunden. Von den beiden anderen Anschlüssen 13 und 14 des Vierwegeventiles 10 ist der eine Anschluß 13 mit einer zum Saugwagen führenden Hauptrohrleitung 15 und der andere Anschluß 14 mit einem in die Atmosphäre mündenden Rohrstutzen 16 verbunden. Die Hauptrohrleitung 15 teilt sich in ein erstes und zweites Rohrleitungsstück 17 und 18 auf, von denen das erstes über einen Druckeinlaß 24 in den Druckraum 4 und das zweite über einen Saugeinlaß 25 in den Saugraum 3 mündet.A vacuum pump 7 assigned to the suction vehicle is connected with its suction and pressure ports 8 and 9 to two connections 11 and 12 of a four-way valve 10. Of the two other connections 13 and 14 of the four-way valve 10, one connection 13 is connected to a main pipeline 15 leading to the suction vehicle and the other connection 14 is connected to a pipe socket 16 opening into the atmosphere. The main pipeline 15 is divided into a first and a second pipe section 17 and 18, the first of which opens into the pressure chamber 4 via a pressure inlet 24 and the second opens into the suction chamber 3 via a suction inlet 25.

Bei dem Saugwagen nach dem Stand der Technik (Fig. 1) ist in dem ersten und zweiten Rohrleitungsstück 17 und 18 jeweils ein Sperrventil 19 bzw. 20 vorgesehen. Außerdem zweigt von dem Hauptrohr 15 noch ein in dem Druckraum 4 mündendes Ausgleichsrohr 21 ab.In the suction truck according to the prior art (FIG. 1), a check valve 19 or 20 is provided in each of the first and second pipe sections 17 and 18. In addition, a compensating tube 21, which opens into the pressure chamber 4, branches off from the main tube 15.

Zum Füllen des Saugwagens wird über das Vierwegeventil 10 das Hauptrohr 15 mit dem Saugstutzen 8 der Vakuumpumpe 7 verbunden. Das Sperrventil 19 des ersten Rohrleitungsstückes 17 muß geschlossen und das Sperrventil 20 des zweiten Rohrleitungsstückes 18 geöffnet werden. Damit wird durch die Vakuumpumpe 7 Luft aus dem Saugraum 3 angesaugt, so daß über das Saugrohr 5 Schlamm oder Flüssigkeit in den Saugraum 3 des Aufnahmebehälters 1 eingesaugt werden kann. Mit zunehmender Füllung des Saugraumes 3 bewegt sich der Räumkolben 2 zum Druckraum 4 hin. Um diese Bewegung nicht zu behindern, wird der Druckraum 4 über das Ausgleichsrohr 21 auf dem gleichen Druck wie der Saugraum 3 gehalten.To fill the suction vehicle, the main pipe 15 is connected to the suction port 8 of the vacuum pump 7 via the four-way valve 10. The check valve 19 of the first pipe section 17 must be closed and the check valve 20 of the second pipe section 18 must be opened. Air is thus sucked in by the vacuum pump 7 from the suction chamber 3, so that 5 sludge or liquid can be sucked into the suction chamber 3 of the receptacle 1 via the suction pipe. With increasing filling of the suction chamber 3, the clearing piston 2 moves towards the pressure chamber 4. In order not to hinder this movement, the pressure chamber 4 is kept at the same pressure as the suction chamber 3 via the compensating tube 21.

Ist der Saugraum 3 gefüllt und soll wieder entleert werden, muß über das Vierwegeventil 10 die Strömungsrichtung der Luft in der Hauptrohrleitung 15 umgeschaltet werden. Die Hauptrohrleitung 15 wird jetzt nämlich mit dem Druckstutzen 9 der Vakuumpumpe 7 verbunden. Außerdem wird das Sperrventil 20 des zweiten Rohrleitungsstückes 18 geschlossen und das Sperrventil 19 des ersten Rohrleitungsstückes 17 geöffnet. Nunmehr wird von der Vakuumpumpe 7 Luft in den Druckraum 4 gefördert und der sich dadurch aufbauende Druck bewegt den Räumkolben 2 gegen die Füllung in dem Saugraum 3 des Aufnahmebehälters 1. Über den geöffneten Entleerungsstutzen 6 wird der Inhalt des Saugraumes 3 wieder entleert.If the suction chamber 3 is filled and is to be emptied again, the flow direction of the air in the main pipeline 15 must be switched via the four-way valve 10. The main pipeline 15 is now connected to the pressure port 9 of the vacuum pump 7. In addition, the check valve 20 of the second pipe section 18 is closed and the check valve 19 of the first pipe section 17 is opened. Air is now conveyed into the pressure chamber 4 by the vacuum pump 7 and the pressure which builds up thereby moves the clearing piston 2 against the filling in the suction chamber 3 of the receptacle 1. The contents of the suction chamber 3 are emptied again via the opened discharge nozzle 6.

Um das mühselige Betätigen der Sperrventile zu vermeiden, ist bei dem erfindungsgemäßen Saugwagen nach Fig. 2 in dem in den Saugraum 3 mündenden zweiten Rohrleitungsstück 18 ein Rückschlagventil 22 angeordnet, das bei Druckbeaufschlagung, d.h. bei einer zum Saugraum 3 hin gerichteten Luftströmung, sperrt. Damit kann die von der Vakuumpumpe 7 zum Saugwagen hin geförderte Luft nicht in den Saugraum 3 des Aufnahmebehälters 1 gelangen, sondern strömt über das nicht absperrbare erste Rohrleitungsstück 17 in den Druckraum 4 des Aufnahmebehälters 1. Durch den Druckaufbau im Druckraum 4 wird der Räumkolben 2 - wie bereits beschrieben - entsprechend verschoben und der Saugraum 3 entleert.In order to avoid the tedious actuation of the shut-off valves, a check valve 22 is arranged in the suction vehicle according to the invention according to FIG. 2 in the second pipe section 18 opening into the suction chamber 3. with an air flow directed towards the suction space 3, blocks. Thus, the air conveyed from the vacuum pump 7 to the suction vehicle cannot get into the suction space 3 of the receptacle 1, but flows through the non-lockable first pipe section 17 into the pressure space 4 of the receptacle 1. Due to the pressure build-up in the pressure space 4, the clearing piston 2 - as already described - shifted accordingly and the suction chamber 3 emptied.

Zum Füllen des Saugraumes 3 wird die Hauptrohrleitung 15 mittels des Vierwegeventiles 10 wieder mit dem Saugstutzen 8 der Vakuumpumpe 7 verbunden. Von der Vakuumpumpe 7 kann nunmehr Luft aus dem Saugraum 3 angesaugt werden, da das Rückschlagventil 22 selbsttätig in seine Öffnungsstellung geht und damit den Ansaugweg freigibt. Über das nicht abgesperrte erste Rohrleitungsstück 17 wird in dem Druckraum 4 der gleiche Druck wie in dem Saugraum 3 erzeugt, so daß es keiner gesonderten Ausgleichsleitung bedarf.To fill the suction chamber 3, the main pipeline 15 is connected again to the suction port 8 of the vacuum pump 7 by means of the four-way valve 10. Air can now be sucked in from the suction chamber 3 by the vacuum pump 7, since the check valve 22 automatically goes into its open position and thus clears the suction path. Via the unblocked first pipe section 17, the same pressure as in the suction chamber 3 is generated in the pressure chamber 4, so that no separate compensating line is required.

Bei dem erfindungsgemäßen Saugwagen nach Fig. 2 ist somit zur Umstellung der Betriebsarten lediglich eine Umschaltung der am Saugwagen wirksam werdenden Strömungsrichtung des von der Vakuumpumpe 7 erzeugten Luftstromes notwendig. Die Anordnung des Rückschlagventiles 22 in dem zweiten Rohrleitungsstück 18 führt darüber hinaus noch zur Einsparung eines Sperrventiles im ersten Rohrleitungsstück 17 und zu einer einfacheren Verrohrung.In the suction vehicle according to the invention according to FIG. 2, all that is required to change the operating modes is merely to switch the direction of flow of the air flow generated by the vacuum pump 7 that becomes effective on the suction vehicle. The arrangement of the check valve 22 in the second pipe section 18 also leads to the saving of a check valve in the first pipe section 17 and to a simpler piping.

Bei dem erfindungsgemäßen Saugwagen nach Fig. 3 ist als Vakuumpumpe eine in beiden Drehrichtungen betreibbare Gasringpumpe 26 vorgesehen. Mit der Drehrichtung einer solchen Gasringpumpe 26 kehrt sich auch deren Förderrichtung um. Somit bedarf es keines mechanisch umschaltbaren Vierwegeventiles mehr, um den Aufnahmebehälter 1 einmal mit Saugluft und einmal mit Druckluft zu beaufschlagen. Mit dem Vierwegeventil entfällt auch die entsprechende Verrohrung für den Anschluß dieses Ventiles an die Vakuumpumpe.3, a gas ring pump 26 that can be operated in both directions of rotation is provided as the vacuum pump. The direction of rotation of such a gas ring pump 26 also reverses its direction of delivery. There is therefore no longer any need for a mechanically switchable four-way valve in order to apply suction air and compressed air to the receptacle 1 once. With the four-way valve, there is also no piping for connecting this valve to the vacuum pump.

Die Hauptrohrleitung 15 wird mit dem Anschlußstutzen verbunden, welcher bei der der konstruktiven Auslegung der Gasringpumpe 26 entsprechenden Drehrichtung als Saugstutzen 27 wirkt. Der andere, bei dieser Drehrichtung als Druckstutzen 28 wirkende Anschlußstutzen, mündet in die Atmosphäre.The main pipeline 15 is connected to the connecting piece, which acts as a suction port 27 in the direction of rotation corresponding to the design of the gas ring pump 26. The other connecting piece, which acts as a pressure port 28 in this direction of rotation, opens into the atmosphere.

Beim Füllen des Aufnahmebehälters 1 wird die Gasringpumpe 26 in der ihrer konstruktiven Gestaltung entsprechenden Drehrichtung betrieben. Damit saugt die Gasringpumpe 26 Luft aus dem Aufnahmebehälter 1 an, so daß Schlamm und Flüssigkeit über das Saugrohr 5 des Aufnahmebehälters 1 angesaugt werden. Ist der Aufnahmebehälter 1 gefüllt, so wird zum Entleeren desselben nunmehr die Gasringpumpe 26 in ihrer Drehrichtung umgeschaltet. Damit kehrt sich auch deren Förderrichtung um. Die Gasringpumpe 26 saugt jetzt über ihren eigentlichen Druckstutzen 28 Luft aus der Atmosphäre an und drückt diese über ihren eigentlichen Saugstutzen 27 in die Hauptrohrleitung 15 und von dieser über das Rohrleitungsstück 17 und den Druckeinlaß 24 in den Druckraum 4 des Aufnahmebehälters 1. Das dem Saugeinlaß 25 zugeordnete und im Rohrleitungsstück 18 angeordnete Sperrventil 20 wird zuvor geschlossen und das dem Druckeinlaß 24 zugeordnete und im Rohrleitungsstück 17 angeordnete Sperrventil 19 entsprechend geöffnet.When filling the receptacle 1, the gas ring pump 26 is operated in the direction of rotation corresponding to its design. So that the gas ring pump 26 sucks air from the receptacle 1, so that sludge and liquid are sucked in through the suction pipe 5 of the receptacle 1. If the receptacle 1 is filled, the gas ring pump 26 is now switched over in its direction of rotation for emptying the same. This also reverses their direction of funding. The gas ring pump 26 now sucks air from the atmosphere via its actual pressure port 28 and presses it via its actual suction port 27 into the main pipeline 15 and from there via the pipe section 17 and the pressure inlet 24 into the Pressure chamber 4 of the receptacle 1. The check valve 20 assigned to the suction inlet 25 and arranged in the pipe section 18 is previously closed and the check valve 19 assigned to the pressure inlet 24 and arranged in the pipe section 17 is opened accordingly.

Durch den sich im Druckraum 4 des Aufnahmebehälters 1 aufbauenden Druck wird der Räumkolben 2 gegen die Füllung in den Saugraum 3 des Aufnahmebehälters 1 gedrückt und drängt diese über den geöffneten Entleerungsstutzen 6 wieder nach außen.Due to the pressure building up in the pressure chamber 4 of the receptacle 1, the clearing piston 2 is pressed against the filling into the suction chamber 3 of the receptacle 1 and urges it outwards again via the opened discharge nozzle 6.

Es wurde erkannt, daß die Gasringpumpe 26 beim Betrieb mit der ihrer durch konstruktive Gestaltung vorgegebenen Drehrichtung entgegengerichteten Drehrichtung noch eine Verdichtungsleistung erbringt, die zum Entleeren eines Saugwagens ausreicht. Somit ist es möglich, durch bloße Umschaltung der Drehrichtung der Gasringpumpe 26 den Füll- und Entleerungsvorgang eines Saugwagens durchzuführen.It has been recognized that the gas ring pump 26, when operating with the direction of rotation opposite to that determined by its design, still produces a compression capacity which is sufficient for emptying a suction vehicle. It is thus possible to carry out the filling and emptying process of a suction vehicle simply by switching the direction of rotation of the gas ring pump 26.

Claims (9)

  1. Suction vehicle for disposing of mud and liquids, having a receiving tank (1) which, for filling and emptying, can optionally have vacuum or excess pressure applied to it by a built-on vacuum pump (7), whereby the receiving tank (1) is subdivided into a suction chamber and a compression chamber (3, 4), and the vacuum pump (7) is connected by means of pipelines (15, 17, 18) both to the suction chamber and to the compression chamber (3, 4), characterised in that the vacuum pump (7) is directly connected to the compression chamber (4) by means of a pipeline (15, 17), and a non-return valve (22), which closes when pressure is applied, is arranged in the pipeline (18) leading to the suction chamber (3).
  2. Suction vehicle for disposing of mud and liquids, having a receiving tank (1) which can be acted on optionally by vacuum or excess pressure by a built-on vacuum pump (7, 26) for filling and emptying, characterised in that the vacuum pump (26) can be operated in both directions of rotation, and the direction of rotation of the vacuum pump (26) can be reversed for filling and emptying the receiving tank (1) respectively.
  3. Suction vehicle according to claim 2, wherein a gas ring pump (26) is provided as a vacuum pump.
  4. Suction vehicle according to claim 2, wherein a rotary-piston pump is provided as a vacuum pump.
  5. Suction vehicle according to claim 2, wherein a rotary slide valve pump (7), which has two rotary slide valves offset by 180° with respect to each other, is provided as a vacuum pump.
  6. Suction vehicle according to claim 2, wherein a diaphragm pump is provided as a vacuum pump.
  7. Suction vehicle according to claim 2, wherein a piston pump is provided as a vacuum pump.
  8. Suction vehicle according to claim 2, wherein a screw pump is provided as a vacuum pump.
  9. Suction vehicle according to claim 2, wherein a claw pump is provided as a vacuum pump.
EP89113290A 1988-08-01 1989-07-19 Gulley emptying vehicule for removal of sludge and liquid Expired - Lifetime EP0353547B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89113290T ATE81536T1 (en) 1988-08-01 1989-07-19 VACUUM TRUCK FOR DISPOSING SLUDGES AND LIQUIDS.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8809800U 1988-08-01
DE19883826140 DE3826140A1 (en) 1988-08-01 1988-08-01 Suction vehicle for disposing of sludge and fluids
DE3826140 1988-08-01
DE8809800U DE8809800U1 (en) 1988-08-01 1988-08-01

Publications (2)

Publication Number Publication Date
EP0353547A1 EP0353547A1 (en) 1990-02-07
EP0353547B1 true EP0353547B1 (en) 1992-10-14

Family

ID=25870730

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89908167A Pending EP0426710A1 (en) 1988-08-01 1989-07-19 Suction waggon for disposal of sludges and liquids
EP89113290A Expired - Lifetime EP0353547B1 (en) 1988-08-01 1989-07-19 Gulley emptying vehicule for removal of sludge and liquid

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP89908167A Pending EP0426710A1 (en) 1988-08-01 1989-07-19 Suction waggon for disposal of sludges and liquids

Country Status (4)

Country Link
EP (2) EP0426710A1 (en)
DE (1) DE58902455D1 (en)
ES (1) ES2035463T3 (en)
WO (1) WO1990001590A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT396145B (en) * 1990-11-15 1993-06-25 Josef Kaiser SWITCHING DEVICE FOR WATER RING PUMPS IN CONNECTION WITH A SUCTION PRESSURE BARREL
JP3229897B2 (en) * 1992-04-13 2001-11-19 三菱電機株式会社 Three-level three-phase inverter device
ES2142193B1 (en) * 1996-04-22 2000-11-01 Daorje S A MOBILE ASPIRATION-DRIVING EQUIPMENT FOR SLUDGE AND / OR EFFLUENTS.
DE19942187A1 (en) * 1999-09-03 2001-03-29 Oase Wuebker Gmbh & Co Kg Mud vacuum

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE129554C (en) *
DE170676C (en) *
FR963365A (en) * 1950-07-06
US1904056A (en) * 1929-12-02 1933-04-18 Kjer Viggo Axel Reversible rotary blower or pump
GB887583A (en) * 1958-05-12 1962-01-17 Ernest Edward Wagner Rotary device with plate valve
CH434109A (en) * 1964-01-08 1967-04-15 Zellinger Ing Fritz Process for transporting sedimenting suspensions and transport vehicle for carrying out this process
US3971400A (en) * 1975-01-24 1976-07-27 Thompson David L Portable vacuum and pressure liquid tank apparatus
DE8703019U1 (en) * 1987-02-27 1987-05-27 Wiedemann, Karl, 8901 Welden, De

Also Published As

Publication number Publication date
DE58902455D1 (en) 1992-11-19
EP0426710A1 (en) 1991-05-15
WO1990001590A1 (en) 1990-02-22
ES2035463T3 (en) 1993-04-16
EP0353547A1 (en) 1990-02-07

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