EP0235767B1 - Blocking device for liquids - Google Patents

Blocking device for liquids Download PDF

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Publication number
EP0235767B1
EP0235767B1 EP87102851A EP87102851A EP0235767B1 EP 0235767 B1 EP0235767 B1 EP 0235767B1 EP 87102851 A EP87102851 A EP 87102851A EP 87102851 A EP87102851 A EP 87102851A EP 0235767 B1 EP0235767 B1 EP 0235767B1
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EP
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Prior art keywords
chamber
shut
liquid
seat
valve
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EP87102851A
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German (de)
French (fr)
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EP0235767A2 (en
EP0235767A3 (en
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Paul Wenger
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Priority to AT87102851T priority Critical patent/ATE52120T1/en
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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
    • E03F5/16—Devices for separating oil, water or grease from sewage in drains leading to the main sewer

Definitions

  • the invention relates to a shut-off device for liquids of the type specified in the preamble of claim 1.
  • a device of this type is known from GB-A 2 129 027.
  • the closure piece is held in the closed position by a small force.
  • a counterweight is used for this.
  • the construction is such that no contaminants can accumulate on the counterweight, which would increase the force holding the locking piece in the closed position.
  • oil or petrol that flows onto the street or onto a property in the event of an oil accident gets into the pipe network in the same way as rainwater through the street drain and the sewer inlet shafts before the oil or Gasoline on the street or property could be prevented. From the sewage system, the oil gets into open water, because of the oil or petrol residues remaining in the raw butts for a long time. This has the well-known, serious sequelae, which were previously only avoidable to a limited extent using expensive means.
  • the invention seeks to remedy this.
  • the invention achieves the object of creating a shut-off device for liquids which locks when an arbitrary amount of a liquid of lower density occurs and opens when a liquid of higher density occurs.
  • the facility with a gully i.e. H. is used in the upper end of a sewage system of a sewage system, the liquid of higher density being water, that of lower density being oil or gasoline, it is an oil barrier which is particularly suitable for the purposes of water protection.
  • this is apparently not the only usability of the facility, especially since. B. malfunctions in chemical plants u.
  • the entry of a liquid other than the intended in a line must be avoided, for which the device according to the invention can be used if the other liquid has a lower density than that.
  • the device's shut-off device also acts as an odor trap and as a check valve.
  • the liquid of lower density also acts in the closing direction of the closure piece.
  • the effect as a check valve can be maintained or canceled.
  • the advantages achieved by the invention are essentially to be seen in the fact that the barrier acts on any amount of the less dense liquid.
  • the device according to the invention is structurally simple and easy to clean. It can be designed as an insert made of cast iron or plastic that can be inserted into the upper end of the inlet shaft and is easily removable. For the liquid of higher density, there is practically no risk of icing in the case of water, especially if the shut-off element is, as is preferred, a flap valve.
  • the single figure shows a vertical section through a shut-off device for liquids for use as an oil barrier in the upper end of a sewer drainage shaft.
  • the device shown is designed as an insert 2 with a rectangular plan that can be inserted into the upper end of a partially shown inlet shaft I, the basic structure of which consists of the following parts: a first chamber 4, open at the top, under the lock grate 5 of the inlet shaft I, a closed one second chamber 7, a partition 8 between the two chambers 4 and 7, an overflow 10 of the first chamber 4, which is formed by a passage opening in the uppermost part of the partition 8, an outlet valve 12 designed as a flap valve with a flap 13 and a flap seat 14 at the bottom 15 of the first chamber 4 and a flap 19 arranged via a flap seat 16 on the bottom 17 of the second chamber 7, the flaps 13 and 19 closed in the illustrated rest position being firmly connected to one another and around a horizontal one arranged on the dividing wall 8 Flap axis 20 are pivotable.
  • the bottom 15 of the first chamber 4 and the bottom 17 of the second chamber 7 are arranged symmetrically with respect to the plane of the partition 8, starting from the flap axis 20, downwards.
  • Under the second chamber 7 there is a space 34 which is delimited by a wall 22 which is almost flush with the partition 8 and a further wall 23 and which has an opening 25 adjoining the opening of the seat 16 and by an opening 26 at the lower end of the wall 22 communicates with a space 27 under the first chamber 4.
  • a cap 30 is attached to the inlet side of the overflow 10, which cap is open at the bottom and is connected to the partition 8 at its lateral edges and at its upper edge in order to prevent splash water from the first chamber 4 from flowing over the Overflow 10 reaches the second chamber 7.
  • a hanging, non-return valve 31 is arranged on the outlet side of the overflow 10. The first chamber 4 is accessible after the sluice grate 5 has been removed, the second chamber 7 is accessible after the removal of a watertight closing piece 33.
  • the flap 13 of the exhaust valve 12 is located under the flap seat 14, the flap 19 is arranged above its flap seat 16. Accordingly, a liquid in the first chamber 4 acts on the flap 13 of the outlet valve 12 in the opening direction, and a liquid in the second chamber 7 acts on the second flap 19 in the closing direction.
  • the two flaps 13 and 19 are resiliently held in the closed position in that the flap 13 of the outlet valve 12 is made lighter than the flap 19 (as shown in the drawing by the thickness below separated the flaps 13 and 19 is expressed).
  • the difference in weight of the two flaps 13 and 19 is dimensioned such that the torque holding them in the closed position by gravity is overcome by the torque acting in the opening direction, which the pressure acting on the flap 13 exerts on a water filling of the first chamber 4 before that Level of filling reaches the overflow 10, but is not overcome when the first chamber 4 is completely filled with oil or petrol, which is also in a layer of relatively small thickness above the lock grate 5, as is the case when oil or Petrol flows on the street.
  • the second flap 19 and its seat 16 form a second valve, but the same is not used as a shut-off device, but rather only to improve or additionally secure the blocking action against oil or gasoline, by the pressure at the bottom 16 of the second chamber 7 being an additional force Closing direction exerts on the outlet valve 12 when the second chamber 7 contains a liquid, which - as described above - is only possible if oil or gasoline, but not if water flows into the first chamber 4.
  • the device can in principle also be carried out without the second chamber 7, the flap 13 of the outlet valve 12 being able to be held in the closed position by a counterweight (or a spring), so that it gives way before the water in the single chamber detects the height of the sluice grate reached (e.g. when the chamber is about half full), but does not give way when the chamber is completely filled with oil or petrol, which is also above the sluice grate 5.
  • the device Since the outlet valve 12 (and likewise - if present - the second flap 19) is closed in the rest position, the device also acts as an odor trap, and since the flap 13 rests on the underside of its seat 14, the device also acts as a check valve, for which purpose the seat opening 16 (if present) is to be dimensioned equal to or better smaller than that of the exhaust valve 12. By making it larger, the effect as a check valve can be prevented if desired (with the check valve 31 being omitted. With these effects of the device, the density of the liquid is not important.
  • the device can also be carried out without the seat 16 if it is ensured in another way that the ground pressure of a liquid which has spilled over the overflow 10 acts only on the upper side of the flap 19, and whose swiveling is sufficiently preserved.
  • a (not shown) balloon or bag made of flexible material lies on the flap 19 and is connected tightly to the opening forming the overflow 10, so that liquid that has spilled over the overflow places a load on the flap 19.
  • the edge of the flap 19 could also be tightly connected to the side walls of the second chamber 7 below the overflow 10 by a bellows (not shown).
  • the balloon, bag or bellows is supported on the side walls of the second chamber 7 when liquid flows into it, it can consist of very flexible, light material, so that it (in an empty state) does not significantly load or prevent the flap 19.
  • the balloon or pouch can be squeezed out or simply replaced after an oil accident. In these two versions, parts 17, 22, 23, 26 and 31 are superfluous.
  • the second chamber 7 can be tapered as desired above its space required for pivoting the flap 19. It is also sufficient if it only has the height required for pivoting the flap 19, and through a tube with the opening of the partition 8 forming the overflow 10 . connected is. In this case, a smaller amount of liquid that has passed over the overflow 10 is sufficient for the locking flap 19 to promote or secure the locking action.

Abstract

1. Shut-off device for liquids, particularly for gulleys, with a chamber (4) having at the top an inlet (5) and at the bottom an outlet with a shut-off means (12), the closure member (13) of which is yieldingly maintained in the closed position in order to yield before the ground pressure of a liquid, particularly water, in the chamber (4), characterised in that the closure member (13) which, when the chamber (4) is filled with this liquid, yields, before its level reaches the inlet (5) or an overflow (10) provided on the chamber (4), during filling with a liquid of lower density, particularly oil or petrol, remains in the closed position when the level thereof reaches or exceeds the inlet (5) or overflow (10).

Description

Die Erfindung bezieht sich auf eine Absperreinrichtung für Flüssigkeiten der im Oberbegriff des Anspruchs 1 angegebenen Gattung.The invention relates to a shut-off device for liquids of the type specified in the preamble of claim 1.

Eine Einrichtung dieser Gattung ist aus der GB-A 2 129 027 bekannt. Bei dieser bekannten Einrichtung ist das Verschlussstück durch eine kleine Kraft in Schliesslage gehalten. Dazu dient ein Gegengewicht. Dabei ist die Konstruktion so, dass sich auf dem Gegengewicht keine Verunreinigungen ansammeln können, welche die das Verschlussstück in Schliesslage haltende Kraft erhöhen würden.A device of this type is known from GB-A 2 129 027. In this known device, the closure piece is held in the closed position by a small force. A counterweight is used for this. The construction is such that no contaminants can accumulate on the counterweight, which would increase the force holding the locking piece in the closed position.

Wird die bekannte Einrichtung in Gullys verwendet, so gelangt Oel oder Benzin, das bei einem Oelunfall auf die Strasse oder auf ein Grundstück fliesst, auf demselben Weg wie Niederschlagswasser durch den Strassenablauf und die Einlaufschächte der Kanalisation in deren Rohrnetz, bevor die Ausbreitung des Oels oder Benzins auf der Strasse oder dem Grundstück verhindert werden könnte. Von der Kanalisation gelangt das Oel in offene Gewässer, und zwar wegen im Rohmetz verbleibender Oel- oder Benzinrückstände während einer längeren Zeit. Das hat die hinreichend bekannten, schwerwiegenden Folgeerscheinungen, die bisher auch mit aufwendigen Mitteln nur begrenzt vermeidbar waren.If the known device is used in gullies, oil or petrol that flows onto the street or onto a property in the event of an oil accident gets into the pipe network in the same way as rainwater through the street drain and the sewer inlet shafts before the oil or Gasoline on the street or property could be prevented. From the sewage system, the oil gets into open water, because of the oil or petrol residues remaining in the raw butts for a long time. This has the well-known, serious sequelae, which were previously only avoidable to a limited extent using expensive means.

Hier will die Erfindung Abhilfe schaffen. Die Erfindung, wie sie in den Patentansprüchen angegeben ist, löst die Aufgabe, eine Absperreinrichtung für Flüssigkeiten zu schaffen, die beim Auftreten einer beliebigen Menge einer Flüssigkeit geringerer Dichte sperrt und beim Auftreten einer Flüssigkeit höherer Dichte öffnet. Wenn die Einrichtung bei einem Gully, d. h. im oberen Ende eines Einlaufschachtes einer Kanalisation verwendet wird, wobei die Flüssigkeit höherer Dichte Wasser, diejenige geringerer Dichte Oel oder Benzin ist, handelt es sich um eine besonders für die Zwecke des Gewässerschutzes geeignete Oelsperre. Jedoch ist dies offenbar nicht die einzige Brauchbarkeit der Einrichtung, zumal z. B. bei Betriebsstörungen in chemischen Anlagen u. U. das Einlaufen einer anderen Flüssigkeit als der bestimmungsgemässen in eine Leitung vermieden werden muss, wozu die erfindungsgemässe Einrichtung verwendbar ist, wenn die andere Flüssigkeit eine niedrigere Dichte hat als jene. Das Absperrorgan der Einrichtung wirkt auch als Geruchsverschluss und als Rückschlagventil. Bei einer besonderen Ausführungsart der Erfindung wirkt die Flüssigkeit geringerer Dichte zusätzlich in Schliessrichtung des Verschlussstückes. Bei Weiterbildungen dieser Ausführungsart kann die Wirkung als Rückschlagventil beibehalten oder aufgehoben werden.The invention seeks to remedy this. The invention, as specified in the patent claims, achieves the object of creating a shut-off device for liquids which locks when an arbitrary amount of a liquid of lower density occurs and opens when a liquid of higher density occurs. If the facility with a gully, i.e. H. is used in the upper end of a sewage system of a sewage system, the liquid of higher density being water, that of lower density being oil or gasoline, it is an oil barrier which is particularly suitable for the purposes of water protection. However, this is apparently not the only usability of the facility, especially since. B. malfunctions in chemical plants u. U. The entry of a liquid other than the intended in a line must be avoided, for which the device according to the invention can be used if the other liquid has a lower density than that. The device's shut-off device also acts as an odor trap and as a check valve. In a special embodiment of the invention, the liquid of lower density also acts in the closing direction of the closure piece. In further developments of this embodiment, the effect as a check valve can be maintained or canceled.

Die durch die Erfindung erzielten Vorteile sind im wesentlichen darin zu sehen, dass die Sperre bei einer beliebig grossen Menge der weniger dichten Flüssigkeit wirkt. Dabei ist die erfindungsgemässe Einrichtung konstruktiv einfach und leicht zu reinigen. Sie kann als ein in das obere Ende des Einlaufschachtes einsetzbarer und leicht herausnehmbarer Einsatz aus Gusseisen oder Kunststoff ausgeführt werden. Für die Flüssigkeit höherer Dichte besteht, besonders wenn das Absperrorgan, wie bevorzugt, ein Klappventil ist, im Falle von Wasser praktisch keine Vereisungsgefahr.The advantages achieved by the invention are essentially to be seen in the fact that the barrier acts on any amount of the less dense liquid. The device according to the invention is structurally simple and easy to clean. It can be designed as an insert made of cast iron or plastic that can be inserted into the upper end of the inlet shaft and is easily removable. For the liquid of higher density, there is practically no risk of icing in the case of water, especially if the shut-off element is, as is preferred, a flap valve.

Im folgenden wird die Erfindung anhand einer lediglich einen Ausführungsweg darstellende Zeichnung näher erläutert.The invention is explained in more detail below with reference to a drawing which represents only one embodiment.

Die einzige Figur zeigt einen vertikalen Schnitt durch eine Absperreinrichtung für Flüssigkeiten zur Verwendung als Oelsperre im oberen Ende eines Ablaufschachtes einer Kanalisation.The single figure shows a vertical section through a shut-off device for liquids for use as an oil barrier in the upper end of a sewer drainage shaft.

Die dargestellte Einrichtung ist als in das obere Ende eines nur teilweise dargestellten Einlaufschachtes I einsetzbarer Einsatz 2 mit rechteckigem Grundriss ausgeführt, der in seinem grundsätzlichen Aufbau aus folgenden Teilen besteht: Eine oben offene, erste Kammer 4 unter dem Schleusenrost 5 des Einlaufschachtes I, eine geschlossene zweite Kammer 7, eine Trennwand 8 zwischen den beiden Kammern 4 und 7, ein Ueberlauf 10 der ersten Kammer 4, der durch eine Durchlassöffnung im obersten Teil der Trennwand 8 gebildet ist, ein als Klappenventil ausgebildetes Auslassventil 12 mit einer Klappe 13 und einem Klappensitz 14 am Boden 15 der ersten Kammer 4 und eine über einen Klappensitz 16 am Boden 17 der zweiten Kammer 7 angeordnete Klappe 19, wobei die in der dargestellten Ruhelage geschlossenen Klappen 13 und 19 fest miteinander verbunden und um eine horizontale, an der Trennwand 8 angeordnete, gemeinsame Klappenachse 20 schwenkbar sind.The device shown is designed as an insert 2 with a rectangular plan that can be inserted into the upper end of a partially shown inlet shaft I, the basic structure of which consists of the following parts: a first chamber 4, open at the top, under the lock grate 5 of the inlet shaft I, a closed one second chamber 7, a partition 8 between the two chambers 4 and 7, an overflow 10 of the first chamber 4, which is formed by a passage opening in the uppermost part of the partition 8, an outlet valve 12 designed as a flap valve with a flap 13 and a flap seat 14 at the bottom 15 of the first chamber 4 and a flap 19 arranged via a flap seat 16 on the bottom 17 of the second chamber 7, the flaps 13 and 19 closed in the illustrated rest position being firmly connected to one another and around a horizontal one arranged on the dividing wall 8 Flap axis 20 are pivotable.

Der Boden 15 der ersten Kammer 4 und der Boden 17 der zweiten Kammer 7 sind symmetrisch in Bezug auf die Ebene der Trennwand 8, ausgehend von der Klappenachse 20, schräg abwärts angeordnet. Unter der zweiten Kammer 7 befindet sich ein durch eine mit der Trennwand 8 nahezu fluchtende Wand 22 und eine weitere Wand 23 begrenzter Raum 34, der eine an die Oeffnung des Sitzes 16 anschliessende Oeffnung 25 hat und durch eine Oeffnung 26 am unteren Ende der Wand 22 mit einem Raum 27 unter der ersten Kammer 4 in Verbindung steht.The bottom 15 of the first chamber 4 and the bottom 17 of the second chamber 7 are arranged symmetrically with respect to the plane of the partition 8, starting from the flap axis 20, downwards. Under the second chamber 7 there is a space 34 which is delimited by a wall 22 which is almost flush with the partition 8 and a further wall 23 and which has an opening 25 adjoining the opening of the seat 16 and by an opening 26 at the lower end of the wall 22 communicates with a space 27 under the first chamber 4.

In der ersten Kammer 4 ist an der Eingangsseite des Ueberlaufs 10 eine Kappe 30 angebracht, die unten offen und an ihren seitlichen Rändern und an ihrem oberen Rand mit der Trennwand 8 verbunden ist, um zu verhindern, dass Spritzwasser aus der ersten Kammer 4 über den Ueberlauf 10 in die zweite Kammer 7 gelangt. An der Auslaufseite des Ueberlaufs 10 eine hängende, Rückschlagklappe 31 angeordnet. Die erste Kammer 4 ist nach Wegnahme des Schleusenrostes 5, die zweite Kammer 7 ist nach Entfernen eines wasserdicht schliessenden Verschlussstückes 33 zugänglich.In the first chamber 4, a cap 30 is attached to the inlet side of the overflow 10, which cap is open at the bottom and is connected to the partition 8 at its lateral edges and at its upper edge in order to prevent splash water from the first chamber 4 from flowing over the Overflow 10 reaches the second chamber 7. A hanging, non-return valve 31 is arranged on the outlet side of the overflow 10. The first chamber 4 is accessible after the sluice grate 5 has been removed, the second chamber 7 is accessible after the removal of a watertight closing piece 33.

Die Klappe 13 des Auslassventils 12 ist unter dem Klappensitz 14, die Klappe 19 ist oberhalb ihres Klappensitzes 16 angeordnet. Demgemäss beaufschlagt eine Flüssigkeit in der ersten Kammer 4 die Klappe 13 des Auslassventils 12 in Oeffnungsrichtung, und eine Flüssigkeit in der zweiten Kammer 7 beaufschlagt die zweite Klappe 19 in Schliessrichtung. Die beiden Klappen 13 und 19 sind nachgiebig in Schliesslage gehalten, indem die Klappe 13 des Auslassventils 12 leichter ausgeführt ist als die Klappe 19 (wie in der Zeichnung durch den Dickenunterschied der Klappen 13 und 19 zum Ausdruck kommt). Dabei ist der Gewichtsunterschied der beiden Klappen 13 und 19 so bemessen, dass das sie durch die Schwerkraft in Schliesslage haltende Drehmoment durch das in Oeffnungsrichtung wirkende Drehmoment überwunden wird, das der auf die Klappe 13 wirkende Druck einer Wasserfüllung der ersten Kammer 4 ausübt, bevor das Niveau der Füllung den Ueberlauf 10 erreicht, aber nicht überwunden wird, wenn die erste Kammer 4 vollständig mit Oel oder Benzin gefüllt ist, das auch noch in einer Schicht verhältnismässig geringer Dicke über dem Schleusenrost 5 steht, wie das der Fall ist, wenn Oel oder Benzin auf der Strasse fliesst.The flap 13 of the exhaust valve 12 is located under the flap seat 14, the flap 19 is arranged above its flap seat 16. Accordingly, a liquid in the first chamber 4 acts on the flap 13 of the outlet valve 12 in the opening direction, and a liquid in the second chamber 7 acts on the second flap 19 in the closing direction. The two flaps 13 and 19 are resiliently held in the closed position in that the flap 13 of the outlet valve 12 is made lighter than the flap 19 (as shown in the drawing by the thickness below separated the flaps 13 and 19 is expressed). The difference in weight of the two flaps 13 and 19 is dimensioned such that the torque holding them in the closed position by gravity is overcome by the torque acting in the opening direction, which the pressure acting on the flap 13 exerts on a water filling of the first chamber 4 before that Level of filling reaches the overflow 10, but is not overcome when the first chamber 4 is completely filled with oil or petrol, which is also in a layer of relatively small thickness above the lock grate 5, as is the case when oil or Petrol flows on the street.

Damit ergibt sich folgende Wirkungsweise der Sperreinrichtung: Wenn Wasser durch den Schleusenrost 5 in die erste Kammer 4 läuft, öffnet das Auslassventil 12 bevor der Wasserstand die Höhe des Ueberlaufs 10 erreichen kann. Wenn jedoch Oel oder Benzin in die erste Kammer 4 fliesst, bleibt das Auslassventil 12 geschlossen. Sobald der Oel- bzw. Benzinstand die Höhe des Ueberlaufs 10 erreicht hat, fliesst weiteres in die erste Kammer 4 gelangendes Oel bzw. Benzin über den Ueberlauf 10 in die zweite Kammer 7 und beaufschlagt dort die zweite Klappe 19, wodurch die beiden, fest miteinander verbundenen Klappen 13 und 19 zusätzlich in Schliesslage belastet werden, so dass auch eine über dem Schleusenrost 5 stehende, den hydrostatischen Druck erhöhende Oel- oder Bezinschicht die Klappe 18 des Auslassventils 12 nicht zu öffenen vermag. Nach dem Oelunfall wird der Einsatz 2 aus dem Einlaufschacht I herausgenommen, entleert und gereinigt oder die Kammern 4 und 7 werden nach Wegnahme des Schleusenrostes 5 und des Verschlussstückes 33 ausgepumpt.This results in the following mode of operation of the locking device: When water runs through the sluice grate 5 into the first chamber 4, the outlet valve 12 opens before the water level can reach the height of the overflow 10. However, when oil or gasoline flows into the first chamber 4, the exhaust valve 12 remains closed. As soon as the oil or petrol level has reached the level of the overflow 10, further oil or petrol flowing into the first chamber 4 flows via the overflow 10 into the second chamber 7 and acts there on the second flap 19, whereby the two are firmly attached to one another connected flaps 13 and 19 are additionally loaded in the closed position, so that even an oil or gasoline layer standing above the sluice grate 5 and increasing the hydrostatic pressure is unable to open the flap 18 of the outlet valve 12. After the oil accident, the insert 2 is removed from the inlet shaft I, emptied and cleaned, or the chambers 4 and 7 are pumped out after the sluice grate 5 and the closure piece 33 have been removed.

Konstruktiv bilden die zweite Klappe 19 und deren Sitz 16 ein zweites Ventil, jedoch ist dasselbe nicht als ein Absperrorgan sondern nur zur Verbesserung oder ergänzenden Sicherung der Sperrwirkung gegen Oel oder Benzin verwendet, indem der Druck am Boden 16 der zweiten Kammer 7 eine zusätzliche Kraft in Schliessrichtung auf das Auslassventil 12 ausübt, wenn die zweite Kammer 7 eine Flüssigkeit enthält, was - wie oben beschrieben - nur möglich ist, wenn Oel oder Benzin, nicht aber, wenn Wasser in die erste Kammer 4 fliesst. Demnach kann die Einrichtung grundsätzlich auch ohne die zweite Kammer 7 ausgeführt werden, wobei die Klappe 13 des Auslassventils 12 durch ein Gegengewicht (oder eine Feder) in Schliesslage gehalten werden kann, so dass sie nachgibt, bevor Wasser in der einzigen Kammer die Höhe des Schleusenrostes erreicht (z.B., wenn die Kammer etwa zur Hälfte gefüllt ist), aber nicht nachgibt, wenn die Kammer vollständig mit Oel oder Benzin gefüllt ist, das auch noch über dem Schleusenrost 5 steht.Structurally, the second flap 19 and its seat 16 form a second valve, but the same is not used as a shut-off device, but rather only to improve or additionally secure the blocking action against oil or gasoline, by the pressure at the bottom 16 of the second chamber 7 being an additional force Closing direction exerts on the outlet valve 12 when the second chamber 7 contains a liquid, which - as described above - is only possible if oil or gasoline, but not if water flows into the first chamber 4. Accordingly, the device can in principle also be carried out without the second chamber 7, the flap 13 of the outlet valve 12 being able to be held in the closed position by a counterweight (or a spring), so that it gives way before the water in the single chamber detects the height of the sluice grate reached (e.g. when the chamber is about half full), but does not give way when the chamber is completely filled with oil or petrol, which is also above the sluice grate 5.

Da das Auslassventil 12 (und ebenso - falls vorhanden - die zweite Klappe 19) in Ruhelage geschlossen ist, wirkt die Einrichtung übrigens auch als Geruchsverschluss, und da die Klappe 13 dabei an der Unterseite ihres Sitzes 14 anliegt, wirkt die Einrichtung auch als Rückschlagventil, wozu die Sitzöffnung 16 (falls vorhanden) gleich oder besser kleiner als die des Auslassventils 12 zu bemessen ist. Indem sie grösser bemessen wird, kann die Wirkung als Rückschlagventil gewünschtenfalls verhindert werden (wobei das Rückschlagklappe 31 wegzulassen ist. Bei diesen Wirkungen der Einrichtung kommt es auf die Dichte der Flüssigkeit nicht an.Since the outlet valve 12 (and likewise - if present - the second flap 19) is closed in the rest position, the device also acts as an odor trap, and since the flap 13 rests on the underside of its seat 14, the device also acts as a check valve, for which purpose the seat opening 16 (if present) is to be dimensioned equal to or better smaller than that of the exhaust valve 12. By making it larger, the effect as a check valve can be prevented if desired (with the check valve 31 being omitted. With these effects of the device, the density of the liquid is not important.

Da die zweite Klappe 19 nicht als Ventilklappe wirkt, kann die Einrichtung auch ohne den Sitz 16 ausgeführt werden, wenn auf eine andere Weise sichergestellt wird, dass der Bodendruck einer über den Ueberlauf 10 gelaufenen Flüssigkeit nur auf die obere Seite der Klappe 19 wirkt, und deren Schwenkbarkeit hinreichend erhalten bleibt. Dazu kann z.B. ein (nicht dargestellter) Ballon oder Beutel aus flexiblem Material auf der Klappe 19 liegen und dicht an die den Ueberlauf 10 bildende Oeffnung angeschlossen sein, so dass über den Ueberlauf gelaufene Flüssigkeit die Klappe 19 belastet. Auch könnte der Rand der Klappe 19 durch einen (nicht dargestellten) Faltenbalg mit den Seitenwänden der zweiten Kammer 7 unterhalb des Ueberlaufs 10 dicht verbunden sein. Da der Ballon, Beutel oder Faltenbalg sich an den Seitenwänden der zweiten Kammer 7 abstützt, wenn Flüssigkeit in ihn fliesst, kann er aus sehr nachgiebigem, leichten Material bestehen, so dass er (in leerem Zustand) die Klappe 19 weder nennenswert belastet noch hindert. Der Ballon oder Beutel kann nach einem Oelunfall ausgedrückt oder einfach ersetzt werden. Bei diesen beiden Ausführungen sind die Teile 17, 22, 23, 26 und 31 überflüssig.Since the second flap 19 does not act as a valve flap, the device can also be carried out without the seat 16 if it is ensured in another way that the ground pressure of a liquid which has spilled over the overflow 10 acts only on the upper side of the flap 19, and whose swiveling is sufficiently preserved. For this, e.g. a (not shown) balloon or bag made of flexible material lies on the flap 19 and is connected tightly to the opening forming the overflow 10, so that liquid that has spilled over the overflow places a load on the flap 19. The edge of the flap 19 could also be tightly connected to the side walls of the second chamber 7 below the overflow 10 by a bellows (not shown). Since the balloon, bag or bellows is supported on the side walls of the second chamber 7 when liquid flows into it, it can consist of very flexible, light material, so that it (in an empty state) does not significantly load or prevent the flap 19. The balloon or pouch can be squeezed out or simply replaced after an oil accident. In these two versions, parts 17, 22, 23, 26 and 31 are superfluous.

Da der in der zweiten Kammer 7 auf die zweite Klappe 19 wirkende Flüssigkeitsdruck nur von der Höhe der über deren Kammerboden 17 stehenden Flüssigkeit abhängt, kann die zweite Kammer 7 oberhalb ihres zum Schwenken der Klappe 19 erforderlichen Raumes beliebig verjüngt sein. Es genügt auch, wenn sie nur die zum Schwenken der Klappe 19 erforderliche Höhe hat, und durch ein Rohr mit der den Ueberlauf 10 bildenden Oeffnung der Trennwand 8. verbunden ist. Dabei genügt für die die Sperrwirkung fördernde bzw. sichernde Wirkung der zweiten Klappe 19 eine kleinere, über den Ueberlauf 10 gelaufene Flüssigkeitsmenge.Since the liquid pressure acting on the second flap 19 in the second chamber 7 depends only on the height of the liquid standing above the chamber bottom 17 thereof, the second chamber 7 can be tapered as desired above its space required for pivoting the flap 19. It is also sufficient if it only has the height required for pivoting the flap 19, and through a tube with the opening of the partition 8 forming the overflow 10 . connected is. In this case, a smaller amount of liquid that has passed over the overflow 10 is sufficient for the locking flap 19 to promote or secure the locking action.

Claims (9)

1. Shut-off device for liquids, particularly for gul- leys, with a chamber (4) having at the top an inlet (5) and at the bottom an outlet with a shut-off means (12), the closure member (13) of which is yieldingly maintained in the closed position in order to yield before the ground pressure of a liquid, particularly water, in the chamber (4), characterised in that the closure member (13) which, when the chamber (4) is filled with this liquid, yields, before its level reaches the inlet (5) or an overflow (10) provided on the chamber (4), during filling with a liquid of lower density, particularly oil or petrol, remains in the closed position when the level thereof reaches or exceeds the inlet (5) or overflow (10).
2. A device according to claim 1 in which the shut-off means is a flap valve (12), the seat (14) of which is disposed on the expediently inclined bottom (15) of the chamber (4) extending preferably close to its peripheral edge (15).
3. A device according to claim 1 or 2, with an overflow (10), at which the overflow (10) extends into a space (7) on the bottom surface (17) of which there is a member (19) adapted for movement together with the closure member (13) of the shut-off member (12) and which acts on the closure member (13) of the shut-off member (12) when acted upon in the closure direction by the bottom pressure of a liquid in this space (7).
4. A device according to claim 3, in which the space is formed by a second chamber (7), the bottom (17) of which is provided with a seat (16) for a second valve (19) which forms the member, the two valves (13, 19) being rigidly connected to each other, being pivotable about an at least substantially horizontal valve axis (20) extending between their seats (14, 16) and being maintained in the position of closure resiliently by the torque acting on the valves (13, 19) by their force of gravity or by a spring force.
5. A device according to claim 4, in which the bottom surfaces (15, 17) of the two chambers (4, 7) are disposed in planes extending obliquely downwardly to both sides of the common valve axis (20), each valve seat aperture (14, 16) extending to a point close to the edge of the chamber bottom (15 or 17).
6. A device according to claim 4 or 5, in which the seat aperture (14) of the shut-off member (12) and the seat aperture (16) in the bottom (17) of the second chamber (7) lead into interconnected spaces (24, 27) under the chambers (4, 7) and in that the surface of the underside of the valve (13) of the shut-off member (12) is larger than the opening in the seat (16) in the bottom (17) of the second chamber (7) so that the two valves (13, 19) do not yield to a liquid rising in the spaces (24, 27).
7. A device according to claim 4 or 5, in which the two seat apertures (14, 16) lead into interconnected spaces (24, 27) under the chambers (4, 7) and in that the surface of the underside of the valve (13) is so much smaller than the opening in the seat (16) in the bottom (17) of the second chamber (7) that the two valves (13, 19) can yield to a liquid rising in the space (24, 27).
8. A device according to one of claims 1 to 7, in which the chamber (4) or the first and second chambers (4, 7) are accessible for emptying.
9. A device according to one of claims 1 to 8, which is constructed as an insert (2) adapted to be inserted into the top end of an inlet shaft (1) of a ducting system.
EP87102851A 1986-03-05 1987-02-27 Blocking device for liquids Expired - Lifetime EP0235767B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102851T ATE52120T1 (en) 1986-03-05 1987-02-27 SHUT-OFF DEVICE FOR LIQUIDS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH908/86 1986-03-05
CH908/86A CH671988A5 (en) 1986-03-05 1986-03-05

Publications (3)

Publication Number Publication Date
EP0235767A2 EP0235767A2 (en) 1987-09-09
EP0235767A3 EP0235767A3 (en) 1987-12-02
EP0235767B1 true EP0235767B1 (en) 1990-04-18

Family

ID=4197978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102851A Expired - Lifetime EP0235767B1 (en) 1986-03-05 1987-02-27 Blocking device for liquids

Country Status (4)

Country Link
EP (1) EP0235767B1 (en)
AT (1) ATE52120T1 (en)
CH (1) CH671988A5 (en)
DE (1) DE3762359D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4311719A1 (en) * 1993-04-08 1994-10-13 Dyckerhoff & Widmann Ag Light liquid separator with an automatic closure
GB2291073A (en) * 1994-07-07 1996-01-17 B & Al Co Pte Limited Drainage trap

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1351677A (en) * 1919-01-20 1920-08-31 Henry W Nagel Sewer-trap
DE1941891A1 (en) * 1969-08-18 1971-03-04 Karl Meier Separator or barrier for liquids with a specific weight lower than that of water
GB2129027A (en) * 1982-10-26 1984-05-10 Wan Ming Liao Roadside drain inlets

Also Published As

Publication number Publication date
EP0235767A2 (en) 1987-09-09
CH671988A5 (en) 1989-10-13
ATE52120T1 (en) 1990-05-15
EP0235767A3 (en) 1987-12-02
DE3762359D1 (en) 1990-05-23

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