EP0687511A1 - Dispositif de nettoyage des canalisations, en particulier les canalisations des systèmes de distribution de boissons - Google Patents

Dispositif de nettoyage des canalisations, en particulier les canalisations des systèmes de distribution de boissons Download PDF

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Publication number
EP0687511A1
EP0687511A1 EP95107292A EP95107292A EP0687511A1 EP 0687511 A1 EP0687511 A1 EP 0687511A1 EP 95107292 A EP95107292 A EP 95107292A EP 95107292 A EP95107292 A EP 95107292A EP 0687511 A1 EP0687511 A1 EP 0687511A1
Authority
EP
European Patent Office
Prior art keywords
housing
piston
inserts
pistons
inlet
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.)
Withdrawn
Application number
EP95107292A
Other languages
German (de)
English (en)
Inventor
Detlef Obier
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.)
DSI Getraenkearmaturen GmbH and Co KG
Original Assignee
D S I Josef Breitwisch and Co GmbH
DSI Getraenkearmaturen GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by D S I Josef Breitwisch and Co GmbH, DSI Getraenkearmaturen GmbH and Co KG filed Critical D S I Josef Breitwisch and Co GmbH
Publication of EP0687511A1 publication Critical patent/EP0687511A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0325—Control mechanisms therefor

Definitions

  • the invention relates to a device for cleaning pipelines, in particular pipes of dispensing systems, with a four-way switch valve, which has an inlet, two working connections and an outlet for the cleaning liquid, a switching piston and actuating piston being movable longitudinally between two working positions in the valve housing are arranged, and wherein in the pipeline to be cleaned at least one elastic cleaning body is carried by the cleaning liquid, which impinges alternately on the actuating piston.
  • a device of this type is known from DE 39 28 194 C2. This device has not proven itself in practice to a sufficient extent because, like other constructions known from practice, it has been shown that it is very susceptible to malfunction, ie the four-way switching valve in the known construction has not switched with sufficient certainty. It always happened that the switching piston got stuck or stopped in some middle position. This susceptibility to malfunctions is due to the fact that the respective switchover must only take place under the pressure of the liquid which is in the pipes to be cleaned, that is to say exclusively from the work connections on both sides. The static pressure in the pipes to be cleaned and also on both sides of the work connections is the same everywhere. There is only a mutual excess pressure as dynamic pressure.
  • the invention is based on the object of providing a device which ensures safe, reliable switching.
  • liquid-tight inserts limiting its displacement path are arranged on both sides of the switching piston and in that two pilot piston needles are provided between the actuating pistons located outside the inserts, which are designed in this way and interact with liquid passage openings that alternately the closed end faces of the changeover piston are acted upon by the cleaning liquid supplied at the inlet.
  • the drawing illustrates an exemplary embodiment of a four-way switch valve according to the invention with a housing 1, which advantageously has a central housing part 6 with a rectangular cross section, as shown in FIG. 3.
  • Cylindrical housing extensions 7 and 8 are integrally formed on both ends of the rectangular housing part 6.
  • the housing 1 has an inlet 2 and an outlet 3, to which pipes or hoses for the inflow and outflow of the cleaning liquid can be screwed.
  • the device has hose connections 4 and 5 for the connection of those to be cleaned Pipelines or hoses.
  • the housing 1 has a central, longitudinal bore 9, in which a switching piston 10 is guided in a longitudinally displaceable manner.
  • the switching piston is advantageously designed as a cylindrical body and has two annular grooves 11 and 12 at a distance from the closed ends and at a distance from one another.
  • Liquid-tight inserts 13 and 14 limiting its displacement path are arranged on both sides of the switching piston 10.
  • the inserts 13 and 14 are expediently designed as screw inserts and screwed into the ends of the bore 9 on both sides with the interposition of sealing rings 15 and 16.
  • the inserts 13 and 14 have cylindrical recesses 17 and 18 on the outside. Outside the inserts 13, 14 there are actuating pistons 17 and 20 which are movably guided in the cylindrical housing extensions 7, 8.
  • the actuating pistons 19, 20 have conical recesses 21 and 22 on the outer sides with adjoining axial openings 23 and 24. Furthermore, cylindrical recesses 27 and 28 are provided on the actuating pistons 19, 20, specifically on their inner sides.
  • the actuating pistons 19, 20 each have a sealing ring 25 and 26 on the outer circumference.
  • a material-saving and at the same time pressure-resistant housing results from the fact that the central housing part 6, which is rectangular in cross section, extends essentially over the length which corresponds to the distance between the inner end faces of the inserts 13, 14.
  • pilot piston needles 31 and 36 are provided, which are designed in such a way and interact with liquid passage openings that the closed end faces of the switching piston 10 are alternately acted upon by the cleaning liquid supplied at the inlet 2, as further explained in more detail below becomes.
  • the inlet pilot piston needle 36 is guided in a longitudinal housing bore 30 and has end pistons 39 and 40 at the ends and an intermediate piston 41 in the area of inlet 2, so that thin cylindrical middle pieces 37 and 38 are located between the pistons 39, 40 and 41 .
  • the outlet pilot needle 31 is guided in a longitudinally extending housing bore 29. However, this only has end pistons 33 and 34 at the two ends, so that there is a thin cylindrical middle piece 32 between the end pistons 33 and 34.
  • the housing bores 29 and 30 are axially parallel and on both sides, namely above and below the central bore 9, in which the changeover piston 10 is movably guided.
  • the housing bores 29 and 30 extend in an advantageous design to the transverse planes which correspond to the outer end faces of the inserts 13 and 14.
  • the inlet 2 and the outlet 3 are advantageously offset in the axial direction by the amount of the distance between the ring grooves 11 and 12 on the switching piston 10, as can be clearly seen from FIGS. 1, 4 and 5.
  • transverse bores 43, 44, 45 and 46 Adjacent to the inner end faces of the inserts 13, 14 are transverse bores 43, 44, 45 and 46 between the central bore 9, which serves for the changeover piston 10, and the housing bores 29, 30, which serve to receive the pilot piston needles 31, 36 intended.
  • the housing 1 has two further longitudinal bores 49 and 54, which can be seen from FIGS. 2 and 6 and which are offset by 90 o from the housing bores 29, 30 for the pilot piston needles 31, 36 and are provided axially parallel to the central bore 9.
  • the longitudinal bore 49 extends from the left end face in the housing to Cross bore 51, while the longitudinal bore 54 extends from the corresponding housing face to the cross bore 55.
  • These longitudinal bores 49 and 54 interact with the two annular grooves 11 and 12 of the switching piston 10 and also with transverse bores 50, 51, 55 and 56, depending on the respective switching position, so that they alternately connect between the inlet 2 and the one or the other working connection 4 or 5 and then produce via the pipe or hose lines to be cleaned with the outlet 3.
  • the displacement path of the switching piston 10 is advantageously chosen to be approximately twice as large as that of the two actuating pistons 19 and 20, as a comparison of the axial length of the intermediate space 61 and 65 with the axial length of the pressure chamber 42 illustrates.
  • pipe or hose connection parts 62 are detachably fastened by means of union nuts 63 and 64.
  • FIGS. 1 and 3 also illustrate that gaps 59 and 60 are formed in the area of inlet 2 and outlet 3 and at the same time in the area of pilot piston needles 31 and 36.
  • the annular space formed by the special design of the outlet pilot piston needle 31 is provided with the reference symbol 35 and the corresponding annular spaces in the region of the inlet pilot piston needle 36 with the reference symbols 47 and 48.
  • the housing 1 is drilled starting from the respective outer surfaces. The outer bore holes are then closed with liquid-tight plugs 52, 53 and 57 and 58. The same applies to the other transverse bores 43, 44 and 45, 46.
  • the cleaning liquid is fed in at inlet 2 or the inlet opening.
  • the cleaning liquid can flow from the inlet 2 via the intermediate space 59, the annular space 47 and the transverse bore 43 into the pressure chamber 42, so that the left end of the switching piston 10 is acted upon and the switching piston 10 is held in the right position becomes.
  • the pressure chamber 42 is closed towards the outlet 3 because the transverse bore 45 is closed by the left piston 33 of the outlet pilot piston needle 31.
  • the lines to be cleaned are connected as a circuit to the parts 4 and 5, which are expediently designed as plug connections.
  • the cleaning fluid flows from the inlet 2 via the intermediate space 59 and the housing bore shown into the annular groove 12. From the annular groove 12, the cleaning fluid passes through the transverse bore 50 (FIG. 2) into the longitudinal bore 49 and further through the cylindrical recess 27 and the Opening 23 to connection 4. After passing through the pipe or hose to be cleaned, the cleaning liquid returns to connection 5.
  • the cleaning body carried in the circuit now reaches the actuating piston 20, it blocks the opening 24, the cleaning body resting on the conical recess 22.
  • the resulting pressure is sufficient in any case to move the actuating piston 20 together with the pilot piston needles 31 and 36 to the left by a small displacement path corresponding to the axial length of the intermediate space 61.
  • the annular space 47 is blocked with respect to the inlet 2 by the intermediate piston 41.
  • the annular space 48 is opened with respect to the inlet 2, so that a high pressure corresponding to the liquid supplied at the inlet 2 is established via the transverse bore 44 can build up on the right end of the switching piston 10.
  • the outlet pilot piston needle 31 has opened the transverse bore 45 to the annular space 35 and thus to the outlet 3 by displacement of the left end piston 33, while the transverse bore 46 is still closed by the right end piston 34. Due to the pressure of the cleaning liquid, the changeover piston 10 is now shifted to the left due to the predetermined position of the pilot piston needles, so that this releases the housing bores adjacent to the ring grooves 11, 12 as shown in FIG. 4, so that the cleaning liquid according to FIG. 2 is removed from the ring groove 12 can flow via the transverse bore 55 and the longitudinal bore 54 to the connection 5, that is to say in the opposite direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Multiple-Way Valves (AREA)
EP95107292A 1994-06-08 1995-05-13 Dispositif de nettoyage des canalisations, en particulier les canalisations des systèmes de distribution de boissons Withdrawn EP0687511A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9409244U DE9409244U1 (de) 1994-06-08 1994-06-08 Vorrichtung zum Reinigen von Rohrleitungen, insbesondere Rohrleitungen von Schankanlagen
DE9409244U 1994-06-08

Publications (1)

Publication Number Publication Date
EP0687511A1 true EP0687511A1 (fr) 1995-12-20

Family

ID=6909565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107292A Withdrawn EP0687511A1 (fr) 1994-06-08 1995-05-13 Dispositif de nettoyage des canalisations, en particulier les canalisations des systèmes de distribution de boissons

Country Status (2)

Country Link
EP (1) EP0687511A1 (fr)
DE (1) DE9409244U1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351664A2 (fr) * 1988-07-21 1990-01-24 Friedrich Bersch Dispositif de nettoyage de tuyauteries, en particulier de canalisations de bière
DE3928194A1 (de) * 1989-08-25 1991-02-28 Breitwisch Josef & Co Vierwege-umschaltventil fuer eine vorrichtung zur reinigung von rohrleitungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351664A2 (fr) * 1988-07-21 1990-01-24 Friedrich Bersch Dispositif de nettoyage de tuyauteries, en particulier de canalisations de bière
DE3928194A1 (de) * 1989-08-25 1991-02-28 Breitwisch Josef & Co Vierwege-umschaltventil fuer eine vorrichtung zur reinigung von rohrleitungen

Also Published As

Publication number Publication date
DE9409244U1 (de) 1994-09-22

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