EP0130306B1 - Procédé et dispositif pour contrôler un séparateur de tubes - Google Patents

Procédé et dispositif pour contrôler un séparateur de tubes Download PDF

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Publication number
EP0130306B1
EP0130306B1 EP84104819A EP84104819A EP0130306B1 EP 0130306 B1 EP0130306 B1 EP 0130306B1 EP 84104819 A EP84104819 A EP 84104819A EP 84104819 A EP84104819 A EP 84104819A EP 0130306 B1 EP0130306 B1 EP 0130306B1
Authority
EP
European Patent Office
Prior art keywords
pressure
line
comparison
isolator
throughflow
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
Application number
EP84104819A
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German (de)
English (en)
Other versions
EP0130306A2 (fr
EP0130306A3 (en
EP0130306B2 (fr
Inventor
Jürgen Dipl.-Ing. Bälz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCHUBERT & SALZER INGOLSTADT-ARMATUREN GMBH
Original Assignee
Schubert & Salzer Ingolstadt-Armaturen GmbH
Schubert und Salzer Maschinenfabrik AG
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Application filed by Schubert & Salzer Ingolstadt-Armaturen GmbH, Schubert und Salzer Maschinenfabrik AG filed Critical Schubert & Salzer Ingolstadt-Armaturen GmbH
Priority to AT84104819T priority Critical patent/ATE41962T1/de
Publication of EP0130306A2 publication Critical patent/EP0130306A2/fr
Publication of EP0130306A3 publication Critical patent/EP0130306A3/de
Application granted granted Critical
Publication of EP0130306B1 publication Critical patent/EP0130306B1/fr
Publication of EP0130306B2 publication Critical patent/EP0130306B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve

Definitions

  • the present invention relates to a method for controlling a pipe separator as a function of a pressure difference predetermined at a comparison point, which is obtained by comparing the pressures of the inflow side and outflow side, in a device for preventing the backflow of a medium from a discharge line, at which the pressure in a constant safety value is added to the drain line and at which the flow through the pipe separator is released when the predetermined pressure difference is reached, and when the pressure drops below this pressure difference, the flow is interrupted again and the pressure difference is only reduced again when the flow has ended, and a device for carrying it out Procedure.
  • the object of the invention is therefore to provide a method and a device with the aid of which a safe control of the pipe separator is possible even with small amounts of withdrawal without the risk of unstable operating conditions.
  • This object is achieved in that the pressure on the outlet side is reduced for the duration of the throughflow and is built up again when the throughflow has ended, and the pressure thus obtained is in each case compared with the pressure on the inflow side.
  • the flow rate is increased on the outflow side for reducing the outflow-side pressure.
  • a device with a pressure comparison device assigned to the pipe separator which has two opposing comparison surfaces, one of which is subjected to the pressure in the inflow line of the pipe separator and the other to the pressure in the outflow line of the pipe separator and an additional safety value.
  • the device has a backflow preventer connected downstream of the pipe separator, for carrying out the method it is provided that a decoupling device which is effective when the flow through the pipe separator is released and which is connected in parallel to the backflow preventer and contains a secondary backflow preventer is provided between the drain line and the outflow-side comparison surface of the pressure comparison device , which in comparison to the backflow preventer releases the flow even with a small amount withdrawn from the drain line, the secondary backflow preventer with the drain line in front and communicates after the backflow preventer.
  • the design of the secondary backflow preventer causes a greater pressure reduction than the main backflow preventer, so that the downstream side of the pressure comparison device, which is connected to the outlet side of the secondary backflow preventer, is subjected to a lower pressure than in the absence of such a secondary -Return valve.
  • the secondary backflow preventer forms a decoupling device for the pressure comparison device, which is effective when the flow through the pipe separator is released.
  • the pressure drop in the main backflow preventer can be smaller so as to achieve a high flow rate.
  • the secondary backflow preventer has an injector nozzle on the outlet side, which opens into a suction chamber, which in turn is assigned to the comparison surface of the pressure comparison device facing the discharge line and is connected to the discharge line.
  • the injection pump formed in this way causes the flowing medium to reduce the pressure in the surrounding suction space and in the pressure chamber communicating with it, the pressure comparison device tion, whereby the injection pump decouples this pressure chamber as long as the medium flows through the injection pump.
  • the secondary non-return valve has a chamber with a closure element designed as a ball.
  • the ball is advantageously acted upon by a compression spring against the flowing medium, the compression spring being supported on a conical wall of the chamber which merges into the injector nozzle.
  • Pipe separator in the sense of the present invention should be understood to mean any device for shutting off and venting a pipeline, even if no interruption in the pipeline can be generated by an air gap (DE-PS 3 024 545).
  • control security is increased by the method and the device according to the invention by creating stable control conditions.
  • a flutter, i.e. H. an alternating opening and closing of the pipe separator is definitely avoided in this way.
  • the device for preventing the backflow of a medium from a drain line 11 into an inflow line 10 is first explained with the aid of FIG.
  • An essential part of this device is a pipe separator 2 known per se, the special design of which is in principle irrelevant for the present invention.
  • a control valve 3 is connected upstream of the pipe separator 2, which in turn is controlled by a pressure comparison device 4.
  • This pressure comparison device 4 is located between a first comparison line 40, which - in relation to the flow direction through the pipe separator 2 - opens into the inflow line 10 in front of the control valve 3, and a second comparison line 41, which downstream of the pipe separator 2 and a backflow preventer 5 in the drain line 11 opens.
  • control valve 3 and the pipe separator 2 are connected to one another via a connecting line 12, into which a relief line 13 opens.
  • a relief line 13 there is a relief valve 6 which is controlled by the pressure comparison device 4 at the same time as the control valve 3.
  • the pipe separator 2 shown in FIG. 1 has a housing 20 with a piston 21 which is displaceably guided therein and which is sealed off from the wall of the housing 20 by an annular seal 210.
  • the piston 21 merges into a pipe section 211 which, in the flow position of the pipe separator 2, extends into a pipe socket 22 at the end of the housing 20 facing away from the drain line 11.
  • an annular seal 220 is provided in order to seal the pipe piece 211 in its position retracted into the pipe socket 22 to the outside.
  • the pipe section 211 In the ventilation position, the pipe section 211 has left the pipe socket 22, so that an annular gap forms between the pipe section 211 and the pipe socket 22 and a ventilation opening 23 provided in the peripheral wall of the housing 20 is opened. In the area of this annular gap on the underside of the housing 20 there is a drainage connection 24 for spray water, which ends above a collecting funnel 25.
  • the housing 20 has a support ring 26 for a return spring 27 at the free end of the tube piece 211 in its venting position, at the other end of which the piston 21 is supported.
  • the housing 20 carries on its end face 200 facing the connecting line 12 a valve rod 29 with a closure element 290, which can work in the manner of a sliding seal with the inner circumference of the tube piece 211.
  • the mentioned backflow preventer 5 is arranged between the pipe separator 2 and the drain line 11. According to the embodiment shown in FIG. 1, it has a check cone 51 which is mounted and guided in a housing 50 and which is acted upon by a spring 52 in the direction of the pipe socket 22, the end of which is designed as a seat for the check cone 51.
  • the control valve 3 has a housing 30 which is divided transversely to the flow direction by a wall 31. In this wall 31 there is an opening 33 surrounded by a seat 32, which can be closed or released by a closure member 34.
  • the closure member 34 is connected via a lifting rod 35 to a piston 42 of the pressure comparison device 4.
  • This piston 42 is sealingly guided in a housing 43 and divides it into two pressure chambers 431 and 432.
  • the piston 42 is acted upon in the closing direction of the closure member 34 by a compression spring 44 which is supported on the end face of the housing 43 and whose actuating force is set to a constant safety value is what will be explained in more detail later.
  • the pressure spring 44 receiving the pressure chamber 432 of the housing 43, the drain line 11 is connected via the comparison line 41, while the pressure chamber 431 opposite the piston 42 with respect to the piston 42 Housing 43 is connected to the comparison line 40.
  • the piston 42 merges into a cylinder piece 420, with the aid of which it is guided in a guide tube 430.
  • the end face of the piston 42 facing the pressure chamber 432 forms a first comparison surface 423 of the pressure comparison device 4.
  • the second surface of the same size required for the pressure comparison is the sum of the effective end surface of the closure member 34 (comparison surface 424) and that of the cylinder piece 420 surrounding annular comparison surface 422 of the end face of the piston 42 facing the pressure chamber 431. Only the surface that corresponds to the cross-sectional area of the section 350 of the lifting rod 35 adjoining the closure member 34 is to be regarded as the effective end face of the closure member 34.
  • this protruding area of the closure member 34 results in a pressure equalization after it has been lifted off by the medium acting on the closure member 34 on both sides, while with the control valve 3 still closed, that in the inflow line Medium exposed area of the closure member 34 is determined by the size of the opening 33 corresponding to the cross-sectional area of the cylinder piece 420.
  • the relief valve 6 is located in the guide tube 430, which connects the housing 43 of the pressure comparison device 4 to the housing 30 of the control valve 3.
  • the two line sections 130 and 131 of the relief line 13 open into this guide tube 430 in a mutually offset manner, the line section 130 leading to the connecting line 12 and the line section 131 ending above a collecting funnel 28.
  • the relief valve 6 essentially consists of a tapered section 60 of the lifting rod 35.
  • This section 60 is delimited by the cylinder piece 420 on the one hand and by the section 350 on the other hand.
  • the cylinder piece 420 has an annular seal 421 at its end facing the section 60.
  • the section 350 has two ring seals 61 and 62. These are arranged on the section 350 of the lifting rod 35 so that the ring seal 61 is in the flow position of the control valve 3 between the staggered line sections 130 and 131 of the relief pipe 13 opening into the guide tube 430 .
  • the ring seal 61 In the closed position of the control valve 3, the ring seal 61 is located between the relief line 13 and the housing 30.
  • the further ring seal 62 is always located between the relief line 13 and the housing 30, regardless of the respective working position of the lifting rod 35.
  • the piston 42 of the pressure comparison device 4 will always begin its stroke movement in one or the other direction when the difference between the pressures in the inflow line 10 and in the outflow line 11 is due to the compression spring 44 security value in one direction or the other.
  • This start of stroke is completely independent of the local operating conditions and the pressure fluctuations that may occur in the inflow line 10 and / or the outflow line 11, as will be described in detail below with reference to FIG. 1.
  • FIG 1 shows the device just described in its construction in the shut-off and ventilation position. In this position, both the control valve 3 and the pipe separator 2 as well as the backflow preventer 5 are in their closed position, while the relief valve 6 is in its flow position.
  • the pressure ratio at the comparison surfaces 423 and 422 and 424 of the pressure comparison device also changes accordingly . Attention 4. As well as the pressure acting on the end face of the closure member 34 (comparison surface 424) and on the comparison surface 422 surrounding the cylinder section 420 of the medium located in the inflow line 10, the pressure acting on the comparison surface 423 in the discharge line 11 and the compression spring 44 exceeds, the piston 42 begins its lifting movement. The closure member 34 is lifted from its seat 32, whereby the opening 33 of the control valve 3 is released.
  • the relief valve 6 reaches its closed position, in which the ring seal 61 closes the connection between the line sections 130 and 131 of the relief line 13.
  • the medium flowing through the opened control valve 3 can therefore not leave the connecting line 12 and acts on the piston 21 of the pipe separator 2 with the full pressure.
  • the piston 21 now moves into its other end position, in which the pipe section 211 is immersed in the pipe socket 22 and the ventilation opening 23 closes against the inside of this pipe socket 22.
  • the closure element 290 leaves the pipe section 211, so that the flow through the pipe separator 2 is also released.
  • the medium flowing through the pipe separator 2 now lifts the non-return cone 51 from its seat and thus opens the way through the backflow preventer 5 itself.
  • the backflow preventer 5 returns to its closed position.
  • the pressure acting on the comparison surface 423 now exceeds the pressure acting on the comparison surfaces 422 and 424.
  • the piston 42 is moved in the direction of the control valve 3, the closure member 34 of which thereby rests against its seat 32.
  • the ring seal 61 again releases the connection between the line sections 130 and 131 of the relief line 13, so that the pressure in the connection line 12 can be reduced by the medium flowing off via the relief line 13.
  • the return spring 27 exceeds the pressure of the medium acting on the piston 21 and pushes the piston 42 back into its basic position shown in FIG. 1, in which the closure element 290 prevents the flow through the pipe section 211 and the pipe section 211 allows air to enter.
  • the control of the device for preventing the backflow of a medium from the drain line 11 into the inflow line 10 is therefore not carried out by adapting the pipe separator 2 to the operating conditions present in the individual case.
  • the return spring 27 of the pipe separator 2 can thus be dimensioned independently of the response pressure required in each case. Rather, the pressures in the inflow line 10 and in the outflow line 11 are compared with one another in a comparison point (lifting rod 35 with comparison surfaces 423 and 422 and 424). In this case, the pressure on the side of the comparison point facing the discharge line 11 is increased by a constant safety value, which in the exemplary embodiment shown is effected by the compression spring 44 acting on the piston 42.
  • This compression spring 44 is therefore dimensioned such that the pressure it exerts on the piston 42 generates the pressure difference desired or prescribed by law as a safety value between the inflow line 10 and the outflow line 11. As soon as this pressure equilibrium is lost, this causes a stroke movement of the piston 42 in the corresponding stroke direction.
  • the device for preventing the backflow of the medium from the discharge line 11 into the inflow line 10 has been described in connection with a pipe separator 2, the drive (piston 21) of which is located in the flow path of the medium.
  • Figure 2 shows a modified device with a pipe separator 2, the pressure chamber 81 is arranged outside the flow path of the medium.
  • the pipe separator 2 has a housing 80 which receives a pressure chamber 81 at its end facing the inflow line 10.
  • the pressure chamber 81 is connected to the inflow line 10 via the comparison line 40 branching from it, via a control valve 9 and a control line 810 ending in the pressure chamber 81.
  • the pressure chamber 81 is delimited by the piston 82, which is sealingly guided on the housing wall and on an inlet connection 800 connected to the inflow line 10.
  • a drive sleeve 820 guided in the inlet connection 800 is connected to the piston 82, the end thereof remote from the inlet connection 800 being closed and carrying a seal 821 projecting radially beyond the drive sleeve 820.
  • the drive sleeve 820 has on its circumference one or more openings 822 which act on a locking member 83 slidably mounted on the drive sleeve 820 with the aid of a compression spring 84 which is supported on the piston 82 and which presses the closure member 83 against the seal 821 presses.
  • the closure member 83 has a bulge 830 which encloses a chamber 831. The medium can flow through this when the closure member 83 is lifted off the seal 821.
  • a connecting line 14 leading to the backflow preventer 5 is surrounded by a seal 801 with which the end of the bulge 830 of the closure member can cooperate.
  • the housing 80 is divided into two chambers 802 and 803 by a support ring 85.
  • a return spring 86 for the piston 82 is supported on the support ring 85.
  • the chamber 802 receives the closure member 83.
  • the control valve 9 is designed as a slide valve and has in a housing 90 two pistons 91 and 92, each with two ring seals 910 and 911 or 920 and 921 for sealing against the housing 90.
  • the pistons 91 and 92 are with one another and with the piston 42 (FIG. 1) or a membrane 45 (FIG. 2) of the pressure comparison device 4 by means of a piston rod 93.
  • a branch line 400 branches off from the comparison line 40. This is arranged and dimensioned such that it always opens into the housing between the two pistons 91 and 92, regardless of the working position of the two pistons 91 and 92.
  • the housing 90 also opens a relief line 94 in such a way that in the end position shown the pistons 91 and 92, the branch line 400 with the Relief line 94 is connected, while the branch line 400 in the other end position of the pistons 91 and 92 is connected to the control line 810.
  • the control line 810 has an enlarged orifice 811 which, in the end position of the piston 92 shown, brings about a connection between the control line 810 and a relief line 95, while this connection is interrupted in the other end position of the piston 92.
  • the relief line 94 ends above a collecting funnel 940, while the relief line 95 ends above a collecting funnel 950.
  • the collecting funnels 940 and 950 can be combined to form a common component.
  • FIG. 2 shows a device which prevents a pressure increase caused by the medium flowing through the pipe separator on the side of the pressure comparison device 4 facing the drain line 11.
  • a decoupling device 7 is arranged between the drain line 11 and the side of the pressure comparison device 4 facing the drain line 11.
  • such a decoupling device 7 has been omitted from the device shown in FIG. 1.
  • a negative pressure is generated as a function of the flow velocity of the flowing medium, with which the side of the pressure comparison device 4 facing the drain line 11 is acted upon.
  • the decoupling device 7 is arranged between the drain line 11 and the comparison surface 423 of the pressure comparison device 4 facing the drain line 11, parallel to the backflow preventer 5. It has a control line 70 which on one side opens into the connecting line 14 between the pipe separator 2 and the backflow preventer 5 and on the other side into the drain line 11.
  • a secondary non-return valve 53 and an injection pump 71 are located one behind the other in the control line 70 in the flow direction.
  • the secondary non-return valve 53 has a ball 54 as a closure member, which is arranged in a chamber 55 which is enlarged relative to the control line 70.
  • the ball 54 is acted upon by a compression spring 56 which, when the control line 70 is not traversed by the medium, is held in contact with a conical wall 550 of the chamber 55 which merges into the control line 70.
  • the compression spring 56 in turn is supported on a conical wall 551 of the chamber 55 which merges into an injection nozzle 710.
  • the chamber 55 receiving the ball 54 is thus delimited by the injection pump 71.
  • the start 700 of the control line 70 which has a larger diameter than the injection nozzle 710, is arranged at a distance in front of the injection nozzle 710.
  • This beginning 700 of the control line 70 and the injection nozzle 710 essentially form the injection pump 71, which is surrounded by a suction space 72.
  • This suction space 72 is connected to the pressure comparison device 4 via the comparison line 41.
  • the starting position of the device shown in FIG. 2 corresponds to that of the device shown in FIG. In this position, the difference between the pressures in the inflow line 10 and in the outflow line 11 is less than the safety value defined by the compression spring 44.
  • the pressure chamber 431 of the pressure comparison device 4 is connected to the outlet connection 94 and the pressure chamber 81 of the pipe separator 2 is connected to the outlet connection 95, so that both pressure chambers 431 and 81 are relieved.
  • the pressure ratio in the inflow line 10 and in the outflow line 11 changes in such a way that the pressure acting on the comparison surface 425 of the pressure comparison device 4 outweighs the pressure acting on the comparison surface 423 by more than the safety value, this begins on the comparison surface 425 acting medium to move the membrane 45 (or the piston 42) against the compression spring 44.
  • the membrane 45 takes the two pistons 91 and 92 with it via the piston rod 93, pressure equalization taking place through the opening 900 in the housing 90.
  • the connections between the comparison line 40 and the relief line 94 and between the control line 810 and the relief line 95 are interrupted, while the connection between the comparison line 40 and the control line 810 leading into the pressure chamber 81 is released.
  • the piston 82 of the pipe separator 2 which is acted upon in this way takes the closure member 83, which is supported on the seal 821 under the action of the compression spring 84, via the drive sleeve 82 until it runs onto the seal 801.
  • the medium not only flows through the backflow preventer 5, but also flows through the control line 70 which is secured against backflow of the medium by the secondary backflow preventer 53.
  • the injection pump 71 causes a flow in the suction chamber 72 when the medium flows Generates negative pressure with which the pressure comparison device 4 is acted on, so that a pressure reduction is brought about there. Even in the case of small removal quantities and low flow velocities of the medium, the pressure ver same device 4 no pressure increase occur, which would result in the closing of the pipe separator 2.
  • the spring 52 overcomes the pressure of the medium flowing in from the pipe separator 2 and brings the non-return cone 51 into its closed position.
  • the medium only flows through the secondary backflow preventer 53 and the injection pump 71, as a result of which the flow rate increases there and thereby also ensures that the pipe separator 2 remains in its flow position even with such small withdrawal quantities.
  • the pressure in the suction chamber 72 does not increase again until the withdrawal quantity drops further, so that the flow velocity in the injection pump 71 drops below a value specified by the construction. If the pressure difference between the inflow line 10 and the outflow line 11, which is predetermined by the compression spring 44, is undershot, the pressure comparison device 4 causes the pipe separator 2 to be returned to its closing and ventilation position.
  • the membrane 45 returns to the starting position shown in FIG. 3 when the safety value falls below (force of the compression spring 44).
  • the pistons 91 and 92 are adjusted via the piston rod 93, so that the connection between the comparison line 40 and the control line 810 is interrupted again and the connection between the comparison line 40 and the drain port 94 on the one hand and between the control line 810 and the drain port 95 on the other hand is released, so that the pressure chambers 431 and 81 are relieved and allow an accelerated return of the pipe separator 2 to its ventilation position.
  • the pressure comparison device 4 is always arranged outside the pipe separator 2. However, this is not a requirement. 3, a modification of the embodiment shown in FIG. 2 is discussed, in which the pressure comparison device 4 is integrated in the pipe separator 2.
  • the piston 82 of the pipe separator 2 is part of the pressure comparison device 4, the pressure chamber 81 of the pipe separator 2 facing the inflow line 10 simultaneously forming one of the two pressure chambers of the pressure comparison device 4.
  • This pressure chamber 81 is connected via one or more openings 401, which corresponds to the comparison line 40 shown in FIGS. 1 and 2, to a prechamber 804, which in turn is connected to the inflow line 10.
  • the openings 822 controlling the flow through the pipe separator 2 are in this case arranged at the end of the inlet connection 800 facing away from the inflow line 10, which end is closed on its end face 806 and has an annular seal 805 on its outer circumference.
  • the chamber between the support ring 85 and the piston 82 thus forms the other pressure chamber 432 of the pressure comparison device 4.
  • the sleeve-like closure member 87 has between the support ring 85 and its free end an annular bulge 870, which is dimensioned such that in the flow position of the pipe separator 2, the bulge 870 establishes the connection between the openings 822 and a V 6 closure sleeve 88.
  • This closure sleeve 88 is displaceably guided on an outlet nozzle 807 projecting into the interior of the housing 80 and is pressed by a compression spring 89 in the direction of the inlet nozzle 800 against a stop 807 provided on the outlet nozzle 807.
  • the closure sleeve 88 At its end facing the inlet connection 80, the closure sleeve 88 carries a sealing ring 801 for cooperation with the free end of the closure member 87.
  • the return spring 860 defines the safety value, which determines the pressure difference from which the pipe separator 2 is to assume its flow position. If this safety value is exceeded by the pressure difference between the inflow line 10 (pressure chamber 81) and the outflow line 11 (pressure chamber 432), the piston 82 moves the closure member 87, which thereby runs onto the closure sleeve 88 and prevents ventilation via the ventilation opening 23. At the same time, the bulge 870 releases the connection between the inflow line 10 and the outflow line 11, the backflow preventer 5 and the decoupling device 7 operating in the manner already described above.
  • the pipe separator 2 then returns in a corresponding manner.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Safety Valves (AREA)
  • Check Valves (AREA)
  • Cell Separators (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Pipeline Systems (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (6)

1. Procédé pour commander un séparateur de tubes en fonction d'une différence de pression en un endroit de comparaison, qui s'obtient par comparaison des pressions du côté admission et du côté évacuation, dans le cas d'un dispositif destiné à empêcher le reflux d'un milieu hors d'un conduit d'évacuation, procédé dans lequel une valeur constante de sécurité est ajoutée par calcul à la pression régnant dans le conduit d'évacuation, et dans lequel, lorsque la différence prédéterminée de pression est atteinte, le passage par le séparateur de tubes est dégagé et, lorsque la pression se situe au-dessous de cette différence de pression, le passage est de nouveau interrompu et la différence de pression est à nouveau diminuée en premier lieu par l'achèvement du passage, procédé caractérisé en ce que, du côté évacuation, la pression est réduite pendant la durée du passage et, avec l'achèvement du passage, elle augmente à nouveau et la pression ainsi obtenue est à chaque fois comparée à la pression du côté admission.
2. Procédé selon la revendication 1, caractérisé en ce que, pour diminuer la pression du côté évacuation, la vitesse d'écoulement est augmentée du côté évacuation.
3. Dispositif pour la mise en oeuvre du procédé selon la revendication 1 ou 2, ce dispositif comprenant un dispositif (4) comparateur de pressions, associé au séparateur (2) de tubes, et présentant deux surfaces (423, 425) de comparaison mutuellement opposées, dont l'une est soumise à la pression régnant dans le conduit (10) d'admission du séparateur de tubes et dont l'autre est soumise à la pression régnant dans le conduit (11) d'évacuation du séparateur de tubes, ainsi qu'à une valeur de sécurité supplémentaire, et le dispositif comportant également un organe (5) anti-retour situé en aval du séparateur de tubes, dispositif caractérisé en ce qu'il est prévu, entre le conduit (11) d'évacuation et la surface (423) de comparaison, du côté évacuation du dispositif (4) comparateur de pressions, un dispositif (7) de désaccouplement, actif lorsque le passage est dégagé dans le séparateur (2) de tubes, ce dispositif (7) étant monté en parallèle par rapport à l'organe (5) anti-retour et contenant un organe auxiliaire (53) anti-retour qui, en comparaison de l'organe (5) anti-retour, dégage, même dans le cas d'une faible quantité de diminution, le passage de sortie du conduit (11) d'évacuation, l'organe (53) auxiliaire anti-retour étant relié avec le conduit (14, 11) d'évacuation en amont et en aval de l'organe (5) anti-retour.
4. Dispositif selon la revendication 3, caractérisé en ce que l'organe auxiliaire (53) anti-retour présente, du côté sortie, une buse (710) d'injection qui débouche dans un espace (71) d'aspiration, lequel est associé pour sa part à la surface (423) de comparaison, tournée vers le conduit (11) d'évacuation, du dispositif (4) comparateur des pressions et communique avec le conduit (11) d'évacuation.
5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que l'organe auxiliaire (53) anti-retour présente une chambre (55) comportant un élément obturateur en forme de bille (54).
6. Dispositif selon les revendications 4 et 5, caractérisé en ce qu'un ressort (56) de compression agit sur la bille (54) à l'encontre du milieu en écoulement, le ressort (56) de compression s'appuyant sur une paroi (551) conique de la chambre (55) qui se prolonge par la buse (710) d'injection.
EP84104819A 1983-06-29 1984-04-28 Procédé et dispositif pour contrôler un séparateur de tubes Expired - Lifetime EP0130306B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84104819T ATE41962T1 (de) 1983-06-29 1984-04-28 Verfahren und vorrichtung zum steuern eines rohrtrenners.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3323324A DE3323324C3 (de) 1983-06-29 1983-06-29 Verfahren und Vorrichtung zum Steuern eines Rohrtrenners in Abhängigkeit einer an einer Vergleichsstelle vorgegebenen Druckdifferenz
DE3323324 1983-06-29

Publications (4)

Publication Number Publication Date
EP0130306A2 EP0130306A2 (fr) 1985-01-09
EP0130306A3 EP0130306A3 (en) 1985-09-25
EP0130306B1 true EP0130306B1 (fr) 1989-04-05
EP0130306B2 EP0130306B2 (fr) 1994-03-02

Family

ID=6202620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84104819A Expired - Lifetime EP0130306B2 (fr) 1983-06-29 1984-04-28 Procédé et dispositif pour contrôler un séparateur de tubes

Country Status (3)

Country Link
EP (1) EP0130306B2 (fr)
AT (1) ATE41962T1 (fr)
DE (2) DE3323324C3 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3500907A1 (de) * 1985-01-12 1986-07-31 Juergen Baelz Controls Gesellschaft für Meß- und Regeltechnik mbH, 7102 Weinsberg Vorrichtung zum absperren und belueften einer rohrleitung
DE3501070A1 (de) * 1985-01-15 1986-08-07 Juergen Baelz Controls Gesellschaft für Meß- und Regeltechnik mbH, 7102 Weinsberg Vorrichtung zum absperren und belueften einer rohrleitung
DE3509720A1 (de) * 1985-03-18 1986-09-25 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Rohrtrenner
DE8508064U1 (de) * 1985-03-19 1985-04-25 Honeywell-Braukmann GmbH, 6950 Mosbach Ventilkombination
DE3520250A1 (de) * 1985-06-05 1986-12-11 Grünbeck Wasseraufbereitung GmbH, 8884 Höchstädt Rohrtrenner
DE3616266A1 (de) * 1986-05-14 1987-11-19 Baelz Juergen Controls Vorrichtung zum absperren und belueften einer rohrleitung
DE3616267A1 (de) * 1986-05-14 1987-11-19 Baelz Juergen Controls Absperr- und belueftungsvorrichtung, insbesondere rohrtrenner fuer trinkwasserleitungen
DE3824493A1 (de) * 1988-07-20 1990-01-25 Schubert & Salzer Maschinen Verfahren und vorrichtung zur steuerung von zwei mediumstroemen
GB8826993D0 (en) * 1988-11-18 1988-12-21 Pro Aqua Systems Ltd Pressure reducing valve
DE3932402A1 (de) * 1989-09-28 1991-04-11 Schubert & Salzer Maschinen Rohrtrenner zum be- und entlueften einer rohrleitung
CN102392474B (zh) * 2011-08-12 2013-06-05 天津职业技术师范大学 废水二次利用增压系统及控制方法
DE202014100172U1 (de) * 2014-01-16 2015-04-20 Viega Gmbh & Co. Kg Sicherungsvorrichtung zum Schutz einer Trinkwasser-Installation gegen Rückfließen von gebrauchtem oder verunreinigtem Wasser

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Publication number Priority date Publication date Assignee Title
US2588284A (en) * 1946-07-09 1952-03-04 Herbert C Otis Fluid pressure differential responsive cutoff valve
DE1600981B1 (de) * 1967-01-14 1972-03-09 Alfred Waletzko Appbau Rohrunterbrecher
DE2747941C2 (de) * 1977-10-26 1985-02-14 Lang Apparatebau GmbH, 8227 Siegsdorf Vorrichtung zum Schutz von Trinkwasserleitungen gegen rückfließendes Brauchwasser
CH628383A5 (de) * 1977-10-26 1982-02-26 Waletzko Alfred Apparatebau Vorrichtung zum schutz von trinkwasserleitungen gegen rueckfliessendes brauchwasser.
DE2806310C2 (de) * 1978-02-15 1986-08-21 Lang Apparatebau GmbH, 8227 Siegsdorf Vorrichtung zum Schutz von Trinkwasserleitungen gegen rückfließendes Brauchwasser
DE2849825C2 (de) * 1978-11-17 1984-05-10 Lang Apparatebau GmbH, 8227 Siegsdorf Trinkwasser-Durchflußarmatur mit in eine Trinkwasserversorgungsleitung eingebautem Durchflußwächter
FR2469630B1 (fr) * 1979-11-12 1986-02-14 Frisquet Anc Ets M Disconnecteur pour canalisation d'eau potable
DE3247325C2 (de) * 1982-12-21 1990-02-15 Grünbeck Wasseraufbereitung GmbH, 8884 Höchstädt Rohrtrenner

Also Published As

Publication number Publication date
ATE41962T1 (de) 1989-04-15
DE3477591D1 (en) 1989-05-11
EP0130306A2 (fr) 1985-01-09
DE3323324C2 (de) 1986-10-09
DE3323324C3 (de) 1995-10-12
EP0130306A3 (en) 1985-09-25
EP0130306B2 (fr) 1994-03-02
DE3323324A1 (de) 1985-01-10

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