EP0130306A2 - 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
EP0130306A2
EP0130306A2 EP84104819A EP84104819A EP0130306A2 EP 0130306 A2 EP0130306 A2 EP 0130306A2 EP 84104819 A EP84104819 A EP 84104819A EP 84104819 A EP84104819 A EP 84104819A EP 0130306 A2 EP0130306 A2 EP 0130306A2
Authority
EP
European Patent Office
Prior art keywords
pressure
line
pipe separator
comparison
medium
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.)
Granted
Application number
EP84104819A
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German (de)
English (en)
Other versions
EP0130306A3 (en
EP0130306B1 (fr
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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Publication date
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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
Publication of EP0130306B1 publication Critical patent/EP0130306B1/fr
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Publication of EP0130306B2 publication Critical patent/EP0130306B2/fr
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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 adapting the response pressure to the pressure conditions given in the drain line in a device for preventing the backflow of a medium from a drain line into the feed line, and a device for carrying out this method.
  • Devices for preventing the backflow of a medium into the inflow line are used wherever there is a risk that contaminated water can be pressed or sucked back into the drinking water line network via a line connection.
  • Another area of application is the protection of lines that lead chemicals to reaction vessels.
  • a pipe separator must disconnect when the inlet pressure drops to a value that is 0.5 bar above the highest possible outlet pressure (safety: 0.5 bar) (supplement to DVGW worksheet W503, section 4.6). Is e.g. the highest possible level of non-drinking water in a system or the highest point of use 10 m above the pipe separator, the pipe separator must disconnect as soon as the inlet pressure drops to 1.5 bar (response pressure).
  • the response pressure is not only dependent on this static height of the water column downstream of the pipe separator, but also on a back pressure generated by pumps, compressors or the like and / or also on an excess pressure generated by steam or gas cushions (Waletzko pipe separator brochure, page 4 ).
  • the object of the invention is therefore to provide a method and a device with the aid of which the response pressure of a device having a pipe separator for preventing the backflow of a medium from a drain line into an inflow line to the pressure conditions in the outflow line can be adjusted in a substantially simpler manner is made possible.
  • the aim of the invention is to ensure that the response pressure is automatically adjusted to the pressure conditions in the drain line, even to changing pressure conditions.
  • “locally given pressure conditions” should be understood to mean the relationships between the inflow line and the outflow line, it not being important how the pressures that arise occur. So the pressure of the medium - as already mentioned - usually depends on the water column or the column of another medium, but this pressure can also be increased by pumps, compressors etc. Like. Be influenced.
  • This object is achieved according to the invention by comparing the pressures in the inflow and outflow lines, adding a constant safety value to the pressure in the outflow line and releasing the flow rate when the total value determined in this way is exceeded.
  • the drive of the device for preventing the backflow is not continuously connected to the inflow line; on the contrary, this connection is only established if a pressure comparison has shown that the pressure in the inflow line is the pressure in the drain pipe exceeds at least the predetermined constant safety value.
  • an increase in pressure caused by the flowing medium is prevented on the side of the comparison point facing the drain line. This is preferably done by generating a pressure reduction as a function of the flow velocity of the flowing medium, with which the side of the comparison point facing the drain line is acted upon.
  • a pipe separator is assigned a pressure comparison device with two opposite, equally large drive surfaces, which are connected to the pipe separator in terms of control and of which one of the two Drive surfaces through the medium of the inflow line and the oppositely arranged drive surface is acted upon by the medium of the drain line and a compression spring, the actuating force of which is fixed to a constant safety value regardless of the locally given pressure conditions.
  • the pressure comparison device which compares the pressures in the inflow line and in the outflow line, ensures that the device is adapted to the locally given pressure conditions.
  • the safety value specified by the applicable regulations or the desired safety value is taken into account by the pressure spring arranged on the side of the pressure comparison device facing the discharge line.
  • the comparison of the pressure conditions on the two sides of the pressure comparison device brings about a constant adaptation to static or dynamic changes in the pressure conditions and ensures that the pipe separator only releases the flow when the required response pressure is reached or even exceeded.
  • the design of the pressure comparison device does not need to be adapted to the local pressure conditions, which contributes to economical production and storage.
  • the pressure comparison device can be designed differently. According to an advantageous embodiment of the subject matter of the invention, a pressure comparison device is provided which is independent of the pipe separator and which has a control valve is assigned to control the supply of the medium in the inflow line for driving the pipe separator, which in turn is assigned a return spring which is fixed independently of the pressure conditions in the outflow line.
  • the object of registration is independent of the special design of the pipe separator.
  • "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 of the pipeline can be generated by an air gap (DE-PS 3,024,545).
  • the control valve in the case of a pipe separator with a drive arranged outside the flow path of the medium, the control valve is designed such that it connects the drive of the pipe separator in its flow position with the inflow line and in its closed position with a relief line.
  • the subject of the invention can also be used in pipe separators with a drive arranged in the flow of the medium (DE-PS 1,600,981).
  • the control valve is arranged in the inflow line to the pipe separator and connected to a relief valve which is arranged in a relief line which branches off from a connecting line between the first closure member and the pipe separator.
  • the pipe separator is only acted upon by the medium pressure in the inflow line if this pressure exceeds the pressure in the outflow line by at least the safety value.
  • the control valve ensures that by shutting off the line acting on the drive of the pipe separator and possibly by releasing a relief line, the medium acting on the drive flows off under the action of the return spring of the pipe separator.
  • the pressure comparison device is an integrated component of the pipe separator.
  • the comparison surface of the pressure comparison device acted upon by the medium in the inflow line is thus formed by the drive surface of the pipe separator.
  • a decoupling device is arranged between the drain pipe and the drain pipe Comparative surface of the pressure comparison device.
  • a decoupling device can have different designs.
  • the decoupling device is connected to a backflow preventer downstream of the pipe separator.
  • the uncoupling device is arranged parallel to a backflow preventer connected downstream of the pipe separator and a control line with a secondary backflow preventer and has an injection pump connected downstream of this in the flow direction, which is surrounded by a suction space which is assigned to the drive surface of the pressure comparison device facing the discharge line.
  • a normal backflow preventer namely has a relatively large flow resistance in order to avoid impairment of the work of the pressure comparison device by an increase in pressure which arises when the medium flows on the outflow side of the device, and thus to ensure safe working.
  • the secondary backflow preventer helps here. Even if the main backflow preventer has already closed, the medium can flow through the secondary backflow preventer.
  • the injection pump causes the flowing medium to reduce the pressure in the surrounding suction space and in the pressure chamber of the pressure comparison device that communicates with it, whereby the injection pump decouples this pressure chamber as long as the medium is injected pump flows through. The pressure drop in the main backflow preventer can thus be reduced, which increases the flow rate.
  • the closure element of the secondary check valve is formed by a ball which is arranged in a chamber delimited in the flow direction by the injection pump.
  • the backflow preventer responds earlier than the pressure comparison device, it is provided in a further embodiment of the subject matter of the invention that the backflow preventer is acted upon in the closing direction with a force which, based on the surface exposed to the medium, exceeds the force of the compression spring in the control valve.
  • the invention is first explained using the example of the device shown in FIG. 1 for preventing the backflow of a medium from a discharge line 11 into an inflow line 10.
  • 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 discharge line 11 is connected to the pressure chamber 432 of the housing 43 receiving the compression spring 44 via the comparison line 41, while the pressure chamber 431 of the housing 43 opposite the piston 42 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 pressure chamber 431 facing the end of the piston 42 ge forms. 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.
  • closure member 34 protrudes beyond the section 350, 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, the surface exposed to the medium in the inflow line of the closure member 34 is determined by the size of the opening 33 which corresponds 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 in such a way that the ring seal 61 is in the flow position of the control valve 3 between the line sections 130 and 131 of the relief line 13 which open into the guide tube 430 and are offset from one another.
  • 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 4.As well as the pressure of the medium in the inflow line 10 acting on the end face of the closure member 34 (comparison surface 424) and on the comparison surface 422 surrounding the cylinder section 420, the pressure of the medium acting on the comparison surface 423 in the outflow 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.
  • the invention is not limited to such an embodiment of the pipe separator 2.
  • Figure 3 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 communicates with the inflow conduit 10 through the abzwei of this - constricting compare line 40, via a control valve 9 and a pressure chamber 81 ending in the control line 810 in connection.
  • the pressure chamber 81 is delimited by a 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 Connected to the piston 82 is a drive sleeve 820 which is guided in the inlet 800 and whose end facing away from the inlet connector 800 is closed and carries a seal 821 which projects radially beyond the drive sleeve 820.
  • the drive sleeve 820 has one or more openings 822 on its circumference, which can be closed by a closure member 83 slidably mounted on the drive sleeve 820.
  • the closure member 83 is acted upon by a compression spring 84 which is supported on the piston 82 and which presses the closure member 83 against the seal 821.
  • the closure member 83 has a bulge 830 which encloses a chamber 831. The water 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 according to Figure 3 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 among themselves and with the Piston 42 ( Figure 1) or a membrane 45 ( Figure 3) of the pressure comparison device 4 connected 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 90 between the two pistons 91 and 92, regardless of the working position of the two pistons 91 and 92.
  • a relief line 94 also opens into the housing 90 in such a way that, in the end position of the pistons 91 and 92 shown, the branch line 400 is connected to the relief line 94, while the branch line 400 in the other end position of the pistons 91 and 92 is connected to the control line 810 communicates.
  • 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. 3 shows a device which prevents a pressure increase on the side of the pressure comparison device 4 facing the drain line 11 caused by the medium flowing through the pipe separator.
  • 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.
  • 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 between the drain line 11 and the comparison surface 423 of the pressure comparison device 4 facing the drain line 11 is arranged 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. 3 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 of the medium 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 Ver DC 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 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 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 3 - 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 a ring-like bulge 870 between the support ring 85 and its free end, 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 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 808 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.
  • the device shown in FIG. 1 can also be modified such that the pressure comparison device 4 is integrated in the pipe separator 2.
  • a corresponding embodiment is shown in FIG. 2.
  • One pressure chamber 432 of the pressure comparison device 4 is formed by the space between the piston 21 and the support ring 26, while the other pressure chamber 431 is formed by the space of the pipe separator 2 connected to the inflow line 10.
  • the return spring 270 acts on the piston 21 with the predetermined safety value.
  • the work of this device corresponds to that of the device shown in FIG.
  • a decoupling device 7 can also be provided in the embodiment shown in FIG. FIG. 2 shows a decoupling device 7 which is designed differently than the device shown in FIGS. 3 and 4.
  • the decoupling device 7 is connected to the backflow preventer 5.
  • the decoupling device 7 essentially consists of a sleeve 510 which has on its outer circumference for sealing against the housing 50 two ring seals 511 and 512 which are arranged at a distance from one another.
  • the comparison line 41 opens into the housing 50 at the end facing away from the pipe separator 2.
  • the connection between the pipe separator 2 and the drain line 11 is interrupted, while the connection between the drain line 11 and the comparison line 41 is released.
  • the pressure comparison device 4 can thus compare the two pressures in the inflow line 10 and in the outflow line 11 and, if a pressure difference exceeding the safety value is exceeded, allow the pipe separator 2 to be acted upon in order to bring it into the flow position.
  • the check cone 51 is lifted from its seat by the pressure of the medium flowing through the pipe separator 2 now acting on the check cone 51.
  • the ring seal 511 shuts off the connection between the pipe socket 22 and the comparison line 41 on the one hand and with the ring seal 512 the connection between the drain line 11 and the comparison line 41 on the other hand.
  • a pressure comparison device 4 two equally large drive surfaces act on the one side from the pressure of the medium located in the inflow line 10 and on the other side from the pressure of the medium located in the outflow line 11 will.
  • the drive surfaces are formed by the opposing surfaces of a single or double piston (not shown) or are also composed of several partial surfaces (see FIG. 1).
  • the drive surface 423 of the pressure comparison device 4 facing the drain line 11 is additionally acted upon by a compression spring 44, 270 or 860, which is dimensioned in accordance with the legally prescribed or desired safety value.

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  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Check Valves (AREA)
  • Safety Valves (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Cell Separators (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Pipeline Systems (AREA)
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
DE3323324 1983-06-29
DE3323324A DE3323324C3 (de) 1983-06-29 1983-06-29 Verfahren und Vorrichtung zum Steuern eines Rohrtrenners in Abhängigkeit einer an einer Vergleichsstelle vorgegebenen Druckdifferenz

Publications (4)

Publication Number Publication Date
EP0130306A2 true EP0130306A2 (fr) 1985-01-09
EP0130306A3 EP0130306A3 (en) 1985-09-25
EP0130306B1 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)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195398A2 (fr) * 1985-03-19 1986-09-24 Honeywell-Braukmann GmbH Combinaison de clapets
EP0351806A2 (fr) * 1988-07-20 1990-01-24 Schubert & Salzer Ingolstadt-Armaturen GmbH Méthode et dispositif pour la régulation des courants de deux fluides
GB2225091A (en) * 1988-11-18 1990-05-23 Pro Aqua Systems Ltd Flow modulator system for pressure reducing valves
EP0420221A2 (fr) * 1989-09-28 1991-04-03 Schubert & Salzer Ingolstadt-Armaturen GmbH Disconnecteur pour aération et désaération d'un conduit
CN102392474A (zh) * 2011-08-12 2012-03-28 天津职业技术师范大学 废水二次利用增压***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

Families Citing this family (6)

* 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
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

Citations (4)

* Cited by examiner, † Cited by third party
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
FR2407302A1 (fr) * 1977-10-26 1979-05-25 Waletzko Alfred Apparatebau Installation de protection de canalisations d'amenee d'eau potable contre tout reflux d'eaux usees
EP0029387A1 (fr) * 1979-11-12 1981-05-27 Anciens Etablissements M. FRISQUET, SA Disconnecteur pour canalisation d'eau potable

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2747941C2 (de) * 1977-10-26 1985-02-14 Lang Apparatebau GmbH, 8227 Siegsdorf Vorrichtung zum Schutz von Trinkwasserleitungen gegen rückfließendes 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
DE3247325C2 (de) * 1982-12-21 1990-02-15 Grünbeck Wasseraufbereitung GmbH, 8884 Höchstädt Rohrtrenner

Patent Citations (4)

* Cited by examiner, † Cited by third party
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
FR2407302A1 (fr) * 1977-10-26 1979-05-25 Waletzko Alfred Apparatebau Installation de protection de canalisations d'amenee d'eau potable contre tout reflux d'eaux usees
EP0029387A1 (fr) * 1979-11-12 1981-05-27 Anciens Etablissements M. FRISQUET, SA Disconnecteur pour canalisation d'eau potable

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195398A2 (fr) * 1985-03-19 1986-09-24 Honeywell-Braukmann GmbH Combinaison de clapets
EP0195398A3 (fr) * 1985-03-19 1987-05-06 Honeywell-Braukmann GmbH Combinaison de clapets
EP0351806A2 (fr) * 1988-07-20 1990-01-24 Schubert & Salzer Ingolstadt-Armaturen GmbH Méthode et dispositif pour la régulation des courants de deux fluides
EP0351806A3 (en) * 1988-07-20 1990-07-18 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Method and device for flow control of two fluids
GB2225091A (en) * 1988-11-18 1990-05-23 Pro Aqua Systems Ltd Flow modulator system for pressure reducing valves
EP0420221A2 (fr) * 1989-09-28 1991-04-03 Schubert & Salzer Ingolstadt-Armaturen GmbH Disconnecteur pour aération et désaération d'un conduit
EP0420221A3 (en) * 1989-09-28 1991-12-11 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Tube disconnector for aeration and de-aeration of a conduit
CN102392474A (zh) * 2011-08-12 2012-03-28 天津职业技术师范大学 废水二次利用增压***及控制方法
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***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
DE102014119719B4 (de) 2014-01-16 2024-06-06 Viega Technology Gmbh & Co. Kg Sicherungsvorrichtung zum Schutz einer Trinkwasser-Installation gegen Rückfließen von gebrauchtem oder verunreinigtem Wasser

Also Published As

Publication number Publication date
DE3323324A1 (de) 1985-01-10
DE3477591D1 (en) 1989-05-11
EP0130306A3 (en) 1985-09-25
DE3323324C2 (de) 1986-10-09
EP0130306B1 (fr) 1989-04-05
ATE41962T1 (de) 1989-04-15
EP0130306B2 (fr) 1994-03-02
DE3323324C3 (de) 1995-10-12

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