EP0379882B1 - Dispositif de nettoyage de conduites - Google Patents

Dispositif de nettoyage de conduites Download PDF

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Publication number
EP0379882B1
EP0379882B1 EP90100337A EP90100337A EP0379882B1 EP 0379882 B1 EP0379882 B1 EP 0379882B1 EP 90100337 A EP90100337 A EP 90100337A EP 90100337 A EP90100337 A EP 90100337A EP 0379882 B1 EP0379882 B1 EP 0379882B1
Authority
EP
European Patent Office
Prior art keywords
valve
piston
pressure
connection piece
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90100337A
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German (de)
English (en)
Other versions
EP0379882A3 (fr
EP0379882A2 (fr
Inventor
Friedrich Bersch
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0379882A2 publication Critical patent/EP0379882A2/fr
Publication of EP0379882A3 publication Critical patent/EP0379882A3/fr
Application granted granted Critical
Publication of EP0379882B1 publication Critical patent/EP0379882B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B08B9/0551—Control mechanisms therefor
    • 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
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/057—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices being entrained discrete elements, e.g. balls, grinding elements, brushes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2605—Pressure responsive
    • Y10T137/2642—Sensor rigid with valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7834—Valve seat or external sleeve moves to open valve

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • the pipes to be cleaned and, for this purpose, connected to one another in a circuit are connected to the connection devices of the housing, optionally via intermediate housings.
  • the cleaning liquid such as lye, acid, rinse water and disinfectant solutions
  • the cleaning fluid first flows through a valve opening into the channel opening into one end face of the piston, from there through the pipes back into the other channel and via the second valve opening into the drain connection.
  • cleaning bodies designed as sponges are taken along.
  • the drain connection is in the case that rinsing water is used as the cleaning liquid is connected to the normal house routine. In the case of lye, acid and disinfectants, these are each returned to a designated container, where they are collected and reused.
  • Such a device can be used for cleaning pipelines in breweries, wineries, dairies, lemonade factories, in the chemical industry, etc. It has now been shown that occasional damage occurs, in particular pipe screw connections loosen or even pipes burst. This is particularly the case when the device is used to clean large-sized pipes and the pipes are cleaned with a high liquid pressure.
  • the invention is therefore based on the object of specifying a device of the type described at the outset with the aid of which the damage mentioned can be avoided with certainty.
  • the pressure relief valve It is connected to the inlet connection, that is to say, for example, arranged in the inlet line after the cleaning pump which delivers the cleaning liquid. If the liquid pressure rises above a specified setpoint, the pressure relief valve opens in the relief path provided for this purpose. In this way, pressure surges in the cleaning device and the pipes are avoided. which occur in particular in the switching process of the piston of the switching valve. This creates a soft switchover effect.
  • the cleaning device is easy to handle due to its compact shape.
  • the construction of the assembly can already take place in the course of the manufacture of the cleaning device, so that the assembly is immediately available at the place of use after the connection to the pipes to be cleaned.
  • the pressure relief valve is relieved via the connection space directly to the drain connection, without the need for a drain line.
  • a connection piece of the pressure relief valve is inserted into the inlet connection, the end of which projects into the connection space and is seated on the part of the piston of the changeover valve on which the valve openings are located.
  • This valve connector can simply be an extension connector or a connector that acts on the valve function.
  • the simple structural design according to claim 5 enables a compact design of the pressure relief valve. It is possible that the valve connector is arranged in the sliding connector or the sliding connector in the valve connector. If the force exerted on the pressure application surface by the cleaning liquid exceeds the spring force acting in opposite directions, then this displaces the sliding connection in relation to the valve connection in the axial direction and thereby releases the relief path.
  • the limit value of the liquid pressure should be just as large be that the piston is moved from one end position to the other. It is therefore essentially based on the weight of the piston, the friction, and the pressure-effective surface on its end faces.
  • the bores can be arranged below or above the bead, via which the pressure application surface of the bead is connected to the inside of the pressure relief valve. In the event that they are arranged above the bead, the sliding connector moves axially downwards into its open position, in the other case it moves upwards.
  • the embodiment according to claim 7 allows the sliding connector and valve connector to be protected from the outside.
  • the flange housing carries connection devices via which the inlet line can be connected to the pressure relief valve.
  • the detachable connection of the flange housing to the valve housing for example via screw connections, enables the pressure relief valve to be detached from the valve housing in a simple manner for maintenance and care purposes and to be connected again therewith.
  • existing four-way switch valves can be retrofitted with a pressure relief valve.
  • the spring force can be generated by a plurality of coil springs.
  • the number and dimensions of the coil springs depend on the limit value of the liquid pressure of the cleaning liquid.
  • the preload of the springs is achieved by connecting the flange housing to the valve housing.
  • the support ring according to claim 9 increases the area on which the springs are supported outside of the guide bores in the direction of the pressure application surface. Therefore, coil springs with a larger diameter can also be used to generate the spring force. In addition, the accuracy of the centering of the guide bores does not have to be so demanding, which considerably simplifies the manufacture of the flange housing.
  • the lock according to claim 10 is of particular importance for the exact adjustment of the valve stub when the valve stub extends to the valve openings.
  • the valve socket engages, for example, in a groove or recess on the piston in the region of the valve opening and seals the valve opening in each case connected to the valve socket and therefore to the inlet line to the connection space.
  • the outer diameter of the end faces of the piston corresponds essentially to the inner diameter of the bushing of the valve housing. Between its end faces, the piston has a portion of smaller diameter, so that in this way the connection space is formed, via which a valve opening is connected to the drain connection in the socket of the valve housing.
  • valve socket sits sealingly on the flattened portion of the piston, so that the cleaning liquid is guided to one valve opening without losses.
  • the signals generated with the motion detector according to claim 13 are processed by a corresponding processing unit, which comprises a number and display or evaluation unit.
  • This motion detector enables a precise detection of the cleaning process or its Cleaning steps when the pressure relief valve opens with each changeover of the four-way changeover valve to relieve the excess pressure.
  • the number of signals when opening or closing the pressure relief valve indicates the frequency of the change of direction of the cleaning liquid and is therefore a measure of the length and intensity of the cleaning process. The monitoring that is possible in this way enables an optimal cleaning effect with minimal cleaning costs.
  • the device 1 for cleaning pipes has a four-way switch valve 2 and a pressure relief valve 3.
  • the four-way switch valve 2 consists of a housing 4 with an inlet connection 5, an outlet connection 6 and a bushing 7 for receiving a displaceable piston 8.
  • connection devices 10 for pipes not shown are arranged at opposite ends in the direction of displacement of the piston 8 that connect the pipes to the changeover valve 2.
  • the piston 8 has two valve openings 11, 12, which are each connected via a channel 13, 14 to end faces 16, 17 carrying openings 15.
  • the end faces 16, 17 of the piston 8 are sealed against the bushing 7 via sealing elements 41.
  • a connecting space 19 is formed by a radial recess 18 of the piston 8, which in the illustrated Position of the piston 8 connects the drain port 6 to the valve opening 12.
  • the pressure relief valve 3 is inserted into the inlet connection 5 of the housing 4 of the changeover valve 3. It has a flange housing 21 connected to the housing 4 via a screw connection 20, in the head 22 of which guide bores 23 are provided for receiving a plurality of coil springs 24. At its free end 25, the flange housing 21 in the embodiment shown carries an external thread 26, for releasable connection to an inlet line, not shown.
  • An axially movable sliding connector 27 and a valve connector 28 are arranged in the interior 32 of the flange housing 21. In the embodiment shown, the sliding connector 27 is located in the valve connector 28.
  • the hollow cylindrical sliding connector 27 has a radially extending bead 29 on its outside and also radially arranged bores 30 underneath. The underside of the bead 29 forms a step with a pressure application surface 31 which extends over the bores 30 communicates with the interior 32 of the pressure relief valve 3.
  • the valve connector 28 is screwed into the inlet connection 5 of the housing 4 of the changeover valve 2 via a thread 33.
  • the counter nut 34 serves to fix and precisely adjust it.
  • the valve connector 28 carries relief openings 38 to form a relief path, which are connected to the drain connection 6 in the open position of the pressure relief valve 3 via the connection space 19.
  • the sliding connector 27 has no relief opening at its lower end. In the open position of the pressure relief valve 3, the lower end 40 of the sliding connector 27 is located above the relief openings of the valve connector 28.
  • the upper end face 36 of the valve connector 28 and the upper side of the bead 29 of the sliding connector 27 are covered with a support ring 37.
  • the helical springs 24 arranged in the guide bores 23 act on the support ring 37, the pretensioning of which is achieved by the screw connection 20 between the flange housing 21 and the valve housing 4.
  • a two-part motion detector 38 is arranged in the flange housing 21 and on the support ring 37, which generates 3 pulse-shaped signals when opening and / or closing the pressure relief valve, which signals are processed in a processing system 39 and displayed.
  • the motion detector can, for example, be made in one piece, one part being arranged on the valve socket or on the support ring, the other part on the flange housing of the pressure relief valve. If it works without contact, it is, for example, optical, magnetic, electronic or inductive in nature. However, mechanical motion detectors are also possible.
  • the method of operation of the device according to the invention is as follows: a cleaning liquid under pressure is supplied to the pressure relief valve 3 through an inlet line, not shown, flows through it and flows in the illustrated end position of the piston 8 through the valve opening 11, via the channel 13, through the Openings 15 in the end face 16 of the piston 8 in the pipelines to be cleaned in the direction of the arrow and thereby take along the cleaning bodies R designed as sponges.
  • the cleaning fluid When the cleaning fluid has flowed through the pipes, it enters the channel 14 through the openings 15 of the end face 17 of the piston 8 and reaches the valve opening 12. From there it flows further via the connection space 19 to the drain connection 6.
  • the cleaning bodies R now meet on the end face 17 of the piston 8, these also close the openings 15 arranged there the consequence that the liquid pressure rises, by means of which the piston 8 is displaced into its other, not shown, end position.
  • the valve connector 28 forms a stop limiting the axial movement of the piston 8, so that the piston 8 comes to rest in an end position in which the valve connector 28 corresponds to the valve opening 12.
  • the helical springs 24 push the sliding connection 27 into its closed position and the cleaning liquid now flows through the valve opening 12 in the opposite direction through the device 1 and the pipes to be cleaned until the cleaning bodies R open the openings 15 in the Close the end face 16 of the piston 8 and the switching process described above is repeated in the opposite direction.

Claims (14)

  1. Dispositif pour le nettoyage de conduites comportant une soupape d'inversion à quatre voies avec un logement, qui présente un raccord d'arrivée (5) et un raccord de sortie (6) pour un liquide de nettoyage et des dispositifs de raccordement (10) pour les conduites ainsi qu'une douille (7) destinée à recevoir un piston (8) déplaçable automatiquement sous l'effet de corps de nettoyage (R) entraînés par le liquide de nettoyage, le piston (8) présentant deux ouvertures de soupape (11, 12) décalées sur sa périphérie, ouvertures de soupape qui sont respectivement raccordées par l'intermédiaire d'un canal (13, 14) avec un côté frontal du piston (16, 17), et sont alternativement en communication avec le raccord d'arrivée (5) et le raccord de sortie (6), dispositif caractérisé en ce que le raccord d'arrivée (5) est raccordé à une soupape de limitation de pression (3) qui présente une voie de décharge (35) reliée au raccord de sortie (6).
  2. Dispositif selon la revendication 1, caractérisé en ce que la soupape de limitation de pression (3) est raccordée au logement de soupape (4) pour former une unité modulaire.
  3. Dispositif selon la revendication 2, caractérisé en ce que la soupape de limitation de pression (3) est incorporée dans le raccord d'arrivée (5) et la voie de décharge (35) débouche dans l'espace de communication (19) sur le côté sortie entourant le piston (8).
  4. Dispositif selon la revendication 2 ou 3, caractérisé en ce que la soupape de limitation de pression (3) est incorporée dans le raccord d'arrivée (5) et comporte une tubulure de soupape (28) qui fait saillie jusque dans les ouvertures de soupape (11, 12).
  5. Dispositif selon les revendications 3 et 4, caractérisé en ce que la soupape de limitation de pression (3) comporte une tubulure de- soupape (28) fixe sur le logement et une tubulure coulissante (27) cylindrique creuse, mobile axialement, qui supporte sur un étage une surface d'attaque de pression (31) sollicitée par la pression d'arrivée et est chargée dans la direction inverse par la force d'un ressort, la tubulure de soupape (28) comportant des ouvertures de décharge pour la formation de la voie de décharge (35) dans la zone de l'espace de communication (19), ouvertures de décharge qui sont obturées dans la position de fermeture de la soupape de limitation de pression (3) par les tubulures coulissantes (27).
  6. Dispositif selon la revendication 5, caractérisé en ce que la tubulure coulissante (27) comporte sur son côté extérieur un bourrelet (29) s'étendant radialement dont un côté forme la surface d'attaque de la pression (31) et sur le côté opposé duquel agit la force du ressort.
  7. Dispositif selon la revendication 5 ou 6, caractérisé en ce que la tubulure coulissante (27) et la tubulure de soupape (28) sont agencées dans un logement à bride (21) raccordé de façon amovible au logement de soupape (4).
  8. Dispositif selon l'une des revendications 5 à 7, caractérisé en ce que la force de ressort peut être produite par une pluralité de ressorts à boudin (24) qui sont agencés dans des alésages de guidage (23) solidaires du logement.
  9. Dispositif selon l'une des revendications 6 à 8, caractérisé en ce que le bourrelet (29) de la tubulure coulissante (27) et un côté frontal (36) de la tubulure de soupape (28) sont recouverts d'un anneau d'appui (37) sur lequel agissent les ressorts à boudin (24).
  10. Dispositif selon l'une des revendications 3 à 9, caractérisé en ce que la tubulure de soupape (29) peut être vissée par un filetage (33) dans le raccord d'arrivée (5) et être bloquée au moyen d'un contre-écrou (34).
  11. Dispositif selon l'une des revendications 3 à 10, caractérisé en ce que l'espace de liaison (19) est formé par une dépression radiale (18) du piston (8) entre ses côtés frontaux (16, 17).
  12. Dispositif selon la revendication 1, caractérisé en ce que les ouvertures de soupape (11, 12) sont agencées dans une zone de la dépression radiale (18) du piston (8) qui est formée par un méplat d'une section de cylindre.
  13. Dispositif selon l'une des revendications 1 à 12, caractérisé en ce que la soupape de limitation de pression (3) comporte un avertisseur de mouvement (38) qui lors de la fermeture et/ou de l'ouverture de la soupape de limitation de pression (3) produit un signal par impulsions.
  14. Dispositif selon l'une des revendications 1 à 13, caractérisé en ce que la soupape de limitation de pression (3) est composée par un alliage d'aluminium revêtu de résine.
EP90100337A 1989-01-23 1990-01-09 Dispositif de nettoyage de conduites Expired - Lifetime EP0379882B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3901829A DE3901829A1 (de) 1989-01-23 1989-01-23 Vorrichtung zum reinigen von rohrleitungen
DE3901829 1989-01-23

Publications (3)

Publication Number Publication Date
EP0379882A2 EP0379882A2 (fr) 1990-08-01
EP0379882A3 EP0379882A3 (fr) 1991-01-09
EP0379882B1 true EP0379882B1 (fr) 1993-07-28

Family

ID=6372583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100337A Expired - Lifetime EP0379882B1 (fr) 1989-01-23 1990-01-09 Dispositif de nettoyage de conduites

Country Status (6)

Country Link
US (1) US5060333A (fr)
EP (1) EP0379882B1 (fr)
AT (1) ATE91926T1 (fr)
DE (2) DE3901829A1 (fr)
DK (1) DK0379882T3 (fr)
ES (1) ES2044238T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4221577C2 (de) * 1992-07-01 1995-04-13 Bersch Friedrich Vorrichtung zur Reinigung von Rohrleitungen
CN102369411B (zh) 2009-03-31 2014-11-05 海德堡技术控股私人有限公司 用于清洁管道的清洁系统
US10012318B2 (en) * 2015-03-24 2018-07-03 Parker-Hannifin Corporation Shuttle valve stabilization through pressure differential and shuttle valve with hollow poppet with weep hole

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1165455A (en) * 1914-04-09 1915-12-28 George Schlemmer Hose or like conduit cleaning device.
US2011323A (en) * 1933-02-08 1935-08-13 Premier Coil Cleaner Co Pipe and tube cleaner
US1979147A (en) * 1933-11-25 1934-10-30 Dobbelmann Emile Apparatus for cleaning beer coils or other pipes
US2087414A (en) * 1935-05-09 1937-07-20 Schaer Eugene Coil cleaning device
US2746250A (en) * 1952-06-17 1956-05-22 North American Aviation Inc Venturi control device for aircraft brake system
DE1782136C3 (de) * 1968-07-23 1979-01-25 Friedrich 5401 Halsenbach Bersch Vorrichtung zum Reinigen von Rohrleitungen, insbesondere Bierleitungen
DE1775673A1 (de) * 1968-09-09 1971-09-09 Shell Int Research Automatische Molchfalle
US3633615A (en) * 1970-03-18 1972-01-11 Sun Oil Co Delaware Control system
US3908688A (en) * 1973-06-08 1975-09-30 Ebenhard S Gandrud Speed adjustment control for a fluid motor
US3896280A (en) * 1974-03-13 1975-07-22 Us Army Valve position indicator
US4057072A (en) * 1976-03-04 1977-11-08 Cook James E Unloader valve
US4403627A (en) * 1980-07-22 1983-09-13 Bradley Gerald R Buffer valve
DE3347004C1 (de) * 1983-12-24 1985-06-05 Friedrich 5401 Halsenbach Bersch Vorrichtung zur Reinigung von Rohrleitungen,insbesondere Schankleitungen
DE3701572A1 (de) * 1987-01-21 1988-08-04 Danfoss As Druckbegrenzungsventil

Also Published As

Publication number Publication date
EP0379882A3 (fr) 1991-01-09
EP0379882A2 (fr) 1990-08-01
DE3901829A1 (de) 1990-08-02
ATE91926T1 (de) 1993-08-15
US5060333A (en) 1991-10-29
DK0379882T3 (da) 1993-11-15
DE3901829C2 (fr) 1991-05-29
DE59002046D1 (de) 1993-09-02
ES2044238T3 (es) 1994-01-01

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