EP0351652B1 - Verfahren und Vorrichtung zum Reinigen von Rohrleitungen - Google Patents

Verfahren und Vorrichtung zum Reinigen von Rohrleitungen Download PDF

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Publication number
EP0351652B1
EP0351652B1 EP89112311A EP89112311A EP0351652B1 EP 0351652 B1 EP0351652 B1 EP 0351652B1 EP 89112311 A EP89112311 A EP 89112311A EP 89112311 A EP89112311 A EP 89112311A EP 0351652 B1 EP0351652 B1 EP 0351652B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
valve
signal
piston
switching
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
EP89112311A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0351652A2 (de
EP0351652A3 (en
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
Priority to AT89112311T priority Critical patent/ATE95088T1/de
Publication of EP0351652A2 publication Critical patent/EP0351652A2/de
Publication of EP0351652A3 publication Critical patent/EP0351652A3/de
Application granted granted Critical
Publication of EP0351652B1 publication Critical patent/EP0351652B1/de
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

Definitions

  • the invention relates to a method for cleaning pipes according to the preamble of claim 1 and to an apparatus for performing this method according to the preamble of claim 8.
  • cleaning of pipelines can be seen comprehensively. It includes the individual cleaning steps as well as the disinfection and rinsing of the pipes.
  • cleaning liquid is also understood to mean bases, acids, disinfectant solutions and rinsing liquids.
  • Such a method and such a device are known for example from DE-C-33 47 004 and DE-A-33 47 003.
  • An automatic switchover of the four-way switchover valve takes place when cleaning bodies hit the face of a valve spool or piston.
  • the duration of the cleaning of the pipelines must, however, be monitored by the operating personnel and also controlled manually by them. Since these workers can only be used to a limited extent during cleaning work, cleaning is time-consuming and causes high personnel costs.
  • the duration of cleaning including the disinfection and rinsing that may be required, is subject to certain fluctuations due to the manual control, so that optimal cleaning conditions cannot be maintained regularly.
  • Optimal cleaning conditions result among other things from the parameters concentration, temperature and quantity of the cleaning liquid as well as the duration of their influence on the pipes to be cleaned. Taking into account minimization of cleaning costs on the one hand and optimization of the desired cleaning effect on the other hand, these factors require precise definition. If the cleaning processes are too short, there is a risk of contamination of the fluid flowing through the pipelines, for example a beverage. Excessive cleaning processes cost time and possibly a higher expenditure of cleaning fluid without the cleaning effect being noticeably increased.
  • the rinsing process with water must ensure that the disinfectant has been completely rinsed out of the pipes.
  • a device for cleaning pipelines in particular beverage lines, is known in which a water connection alternately connects to one or the other working connection by means of a manually operated changeover valve.
  • the lever actuates a mechanical counter that counts the change of direction.
  • the manual change of the flow direction should take place when the cleaning bodies carried with the liquid are in a sight glass between the cleaning device and the pipe connection arrive.
  • the duration and intensity of the cleaning process depends solely on the reliability of the operator and is beyond any control.
  • the documentation of the regular cleaning of a dispensing system of a restaurant is currently done by self-entry in a so-called dispensing system book and can be manipulated as desired.
  • the manipulation possibility in the present case is not only the transfer of an incorrect meter reading to the dispensing system book, but also the fact that the lever is moved back and forth between its two end positions as often as required, with the counter counting each time without the cleaning liquid covering the entire pipeline circuit would have flowed through.
  • GB-A-2 095 407 and US-A-4 590 963 show in particular remote-controlled valves which are provided with a measuring device which report the valve state (open or closed) or the valve position.
  • a flushing device for the automatic cleaning of lines is known, in which a programmer automatically initiates various measures in succession.
  • the invention has for its object to provide a means by which the maintenance of the beverage lines, for example by those responsible or the economic control service, can be better monitored and controlled.
  • an exact recording of the cleaning process or of an individual cleaning step such as cleaning with acid, alkali, intermediate rinsing, Disinfect and rinse.
  • a cleaning step is divided into a certain number of changes in direction of the cleaning liquid in the pipelines, each of which corresponds to a half cycle.
  • the signals generated thereby enable the cleaning step or the entire cleaning process to be precisely recorded and monitored. This monitoring makes it possible to optimize the cleaning process, which produces an optimal cleaning effect with minimal cleaning costs.
  • the signals generated, in particular electrical or optical signals only need to represent information and can therefore be transmitted with little power. The energy available for the automatic switching process is not adversely affected by such signals.
  • the number of switching processes determined with the aid of the signal can be used to document the cleaning processes. This prevents the data from being manipulated, as would be possible, for example, in the case of self-entry in a book intended for this purpose.
  • the change of direction or half cycle can be determined in many ways, for example by a light barrier which is interrupted by the cleaning bodies.
  • the use of the piston movement of the four-way changeover valve is particularly favorable.
  • the number of changes in direction of the cleaning liquid corresponds to the number of piston movements of the changeover valve, namely a movement into a first end position, in which the inlet connection of the changeover valve is connected to the one work connection, and into a second end position, in which this inlet connection is connected to the other work connection.
  • a signal is generated with the aid of the motion detector, which signal is processed by the processing units which follow it.
  • the motion detector according to the invention can work without contact.
  • Such motion detectors are, for example, optical, magnetic, electronic or inductive in nature.
  • a metal part as the motion detector that detunes an electrical resonant circuit and thus generates a signal.
  • the sensors can generate signals in the form of pulses.
  • Commercially available motion detectors can be used that are suitable for the special conditions that occur in pipes and valves. For example, they must be acid, alkali and temperature resistant and watertight, impair the flow resistance as little as possible and be easy to install in the changeover valve.
  • the motion detector is directly connected to a signal processing unit. This measure enables direct processing of the signals triggered by the motion detector, without the need to write down or transmit individual data. This enables an objective control of the cleaning processes, in particular the cleaning time.
  • the motion detector is preferably constructed in two parts, one part being arranged on the piston and the other part on the housing of the valve.
  • the motion detector is connected to a counting and / or display unit.
  • the connection between the motion detector and the counter or display unit is not only to be understood physically. It is also conceivable that the motion detector is connected to the counting or display unit via a radio device.
  • the number of piston movements of the changeover valve can be determined and optimized in advance for all pipes to be cleaned with the device according to the invention, taking into account all parameters that influence the cleaning effect.
  • the rinsing process with fresh water that concludes the cleaning process is also carried out for just as long as is necessary to rinse the cleaning agent or disinfectant out of the pipelines. In this way, cost-effective cleaning, economical consumption of water, in particular rinsing water, and extensive independence from the operating method of the operating personnel are achieved from the outset. The operating personnel can closely monitor the status of the cleaning process.
  • Documentation of the cleaning operations carried out can be achieved by means of an output unit integrated in the display or evaluation unit, for example with a printer station.
  • an output unit integrated in the display or evaluation unit, for example with a printer station.
  • the output unit registers, for example, the date of the cleaning process, the type and duration of the cleaning and the operator.
  • This data is the basis for research and considerations in the event that contamination and hygienic problems should arise. Furthermore these data are used to monitor the operating personnel by their superiors or to check the dispensing system maintenance by the business control service.
  • the signal processing unit or essential parts thereof can be sealed. This measure is particularly appropriate if official controls are to be used to check compliance with legal regulations regarding hygienic maintenance measures for beverage lines.
  • the device according to the invention is also suitable for the following areas of application: on the one hand, for daily flushing through the beverage lines of a restaurant.
  • This flushing process is carried out with fresh tap water which is led into the sewer after the flushing process.
  • a cleaning agent can be added to the water during the first pass.
  • the operator monitors the status of the cleaning process on the display unit and closes the water tap when it is finished.
  • this device can be used to circulate cleaning fluid in circulation through the pipes to be cleaned.
  • the operating personnel starts the liquid pump for the cleaning liquid. This sucks cleaning fluid from a storage container and presses it back into the storage container in alternating directions through the pipes via the automatically operating four-way switch valve. Here the pump is switched off manually after the required piston movement has ended.
  • the device according to the invention with a control unit for switching the liquid pump on and off or for opening and closing the valve in the fresh water line.
  • a control unit for switching the liquid pump on and off or for opening and closing the valve in the fresh water line.
  • the control unit needs only set the number of piston movements of the changeover valve or an equivalent measure.
  • the control unit starts the liquid pump and switches it off again after the cleaning process has ended. Instead, the valve can also be opened or closed.
  • the cleaning process is carried out under conditions which are considered to be optimal, and the operating personnel can be used for other purposes during this time.
  • the operating personnel must connect the connecting lines between the first container with cleaning liquid, for example lye, and the liquid pump with the second container with cleaning liquid, for example acid, and again the Put the control unit into operation after setting the required number of piston movements of the changeover valve.
  • FIG. 1 shows a bar table 1 as it is usually located in the bar area of a restaurant. It has two dispensing taps 2 and 3, which are connected to one another via a connecting hose 4 in the event of cleaning. Likewise for the purpose of cleaning, the lower ends 7 and 8 of the dispensing lines 5, 6 are coupled to working connections 9, 10 of a cleaning device 11 via connecting lines 35, 36.
  • the cleaning device 11 includes a four-way switch valve 20 and a liquid pump 15 driven by a motor. During the cleaning process, the cleaning liquid 12, with the aid of the cleaning device 11, passes alternately via the line 13 into the connecting line 36 and the dispensing line 6 or the connecting line 35 and Dispensing line 5 and via line 14 back into the container 16 that holds the cleaning liquid 12.
  • the preferred embodiment of the changeover valve 20 has essentially conical connection parts 21, 22.
  • the connection parts 21, 22 are connected to the connection valve housing 23 via a bayonet lock 47.
  • An inlet connection 24 and an outlet connection 25 are formed on the housing 23. It has a valve piston 26 which has two valve openings 27, 28. In the axial direction, parallel bores 29, 30, 31, 32 run in the valve piston 26 and connect the valve openings 27, 28 to channel-shaped interior spaces 33, 34 of the conical connecting parts 21, 22. The interiors 33, 34 of the connecting parts 21, 22 go down and up into the working connections 9, 10 for the connecting lines 35, 36. Between the valve housing 23 and the valve piston 26, an annular space 37 is formed, which is connected to the drain port 25.
  • the valve piston 26 carries on its circumferential surface 38 facing the drain connection 25 one part of a motion detector 40, the corresponding part 41 of which is located in the valve housing 21 parallel to the drain connection 25.
  • the part 41 is connected via lines 42, 43 to a circuit having a signal processing unit 44.
  • the part 39 in the preferred embodiment is a metal insert that detunes an electrical resonant circuit formed by the part 41 when the two parts approach each other.
  • a coupling 45 for connection to the pump 15 is fastened in the inlet connection 24 of the valve housing 23. It is sealed with a seal 46 against the valve housing 23.
  • connection parts 21 and 22 and the valve housing 23 Between the connection parts 21 and 22 and the valve housing 23, a seal 48, 49 is also arranged.
  • cleaning fluid 12 flows from the pump 15 through the coupling 45 to the valve opening 26 and from there through the bores 31, 32 into the interior 34 of the connecting part 21. From there, the cleaning fluid 12 via the working connection 10 into the connecting line 36 and the dispensing line 6 and further through the connecting hose 4, the dispensing line 5 and via the connecting line 35 to the working connection 9. From there, the cleaning liquid 12 flows into the interior 33 of the connecting piece 22, further through the bores 29, 30 to the valve opening 27 and from there via the annular space 37 to the outlet connection 25.
  • cleaning bodies R in the simplest case a single sponge ball, are carried along which push the valve piston 26 upwards into the other working position when it hits its end wall.
  • One part 39 of the motion detector 40 approaches the other part 41. This triggers a signal that is processed in the signal processing unit 44.
  • valve opening 27 is connected to the coupling 45, and the cleaning liquid now flows through the pipeline in the opposite direction. If the piston 26 is pushed back into its starting position described first, the two parts 39, 41 of the motion detector 40 move apart, and the pulse-shaped signal triggered in this way is in turn further processed by the signal processing unit 44.
  • the motion detector 40 can have, for example, a metal part which, depending on its position in the changeover valve 20, detunes an oscillating circuit formed in the signal generating device 60. This detuning can be determined in a known manner. Other possibilities of signal generation are conceivable which bring about changes in a state of a circuit of the signal generation device 60 by mechanical or electronic switches, by optical, magnetic or capacitive influences. In particular, an inductive proximity switch of the type VISOLUX NT 8 has proven to be suitable proven. A proximity switch with a Hall generator, which interacts with a permanent magnet on the valve piston, is also well suited.
  • the signal processing unit 44 consists of a signal generating unit 60, a counting device 61 and a display device 62.
  • the signal processing unit or essential parts thereof can be sealed in a manner not shown to exclude manipulation.
  • the movements reported by the motion detector 40 of the changeover valve 20 are converted into signals by the signal generator 60. These are added up with the aid of a counting unit 61 and displayed on the display device 62. This configuration enables a simple observation of the cleaning process.
  • the signals generated by the signal generation unit 60 on the one hand reach the counting device 61 and the display device 62 and on the other hand the control unit 63.
  • the control unit 63 in turn contains a memory in which the piston movements necessary for the individual cleaning steps are stored, an addition device and a target-actual comparator.
  • the control unit 63 also has a switch for switching the pump 50 of the cleaning device 11 on and off.
  • the pump 15 is now put into operation via the programmed control unit.
  • the valve piston 26 moves from one end position to the other until the stored number of piston movements has been processed, which is constantly checked by the actual-target comparator. If this cleaning step is then ended, the pump 15 is stopped via the control unit.
  • This can also be done by means of a changeover valve arrangement which can be actuated by the control unit.
  • the pump is then started up again via the control unit 63, and the process is repeated again. Instead of this, a second pump 15a with associated container 16 can also be switched into the circuit and operated by the control unit.
  • the changeover valve 20 is installed on the one hand in the pipes 70 connected in a circle, on the other hand it is connected to a fresh water line 71 and a waste water line 72.
  • a valve 73 is located in the fresh water line 71.
  • Signal generation unit 60, counting device 61 and display device 62 operate as previously described.
  • the control unit 63 controls the valve 73 in the fresh water line 71.
  • the piston movements required for thorough rinsing with fresh water are stored on the control unit 63.
  • the valve 73 is opened via the control unit 63 until it is kept open until the necessary number of piston movements has taken place and then closed again via the control unit 63. In this way, the valve 73 does not remain open for an unnecessarily long time without the rinsing effect being improved. This results in economical consumption of fresh water.
  • the stationary part of the motion detector 40 is arranged next to the drain connection 25.
  • it can also be placed at other points on the housing 23, in particular on a housing wall that runs parallel to the plane formed by the four connections 9, 10, 24, 25, where the motion detector 40 is unhindered by the connections and, for example, exactly in the Transverse center plane of the housing can be arranged.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP89112311A 1988-07-21 1989-07-06 Verfahren und Vorrichtung zum Reinigen von Rohrleitungen Expired - Lifetime EP0351652B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89112311T ATE95088T1 (de) 1988-07-21 1989-07-06 Verfahren und vorrichtung zum reinigen von rohrleitungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3824852A DE3824852A1 (de) 1988-07-21 1988-07-21 Verfahren und vorrichtung zum reinigen von rohrleitungen
DE3824852 1988-07-21

Publications (3)

Publication Number Publication Date
EP0351652A2 EP0351652A2 (de) 1990-01-24
EP0351652A3 EP0351652A3 (en) 1990-12-12
EP0351652B1 true EP0351652B1 (de) 1993-09-29

Family

ID=6359268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112311A Expired - Lifetime EP0351652B1 (de) 1988-07-21 1989-07-06 Verfahren und Vorrichtung zum Reinigen von Rohrleitungen

Country Status (4)

Country Link
EP (1) EP0351652B1 (enrdf_load_stackoverflow)
AT (1) ATE95088T1 (enrdf_load_stackoverflow)
DE (2) DE3824852A1 (enrdf_load_stackoverflow)
ES (1) ES2045277T3 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102658276A (zh) * 2012-05-18 2012-09-12 西安威正电子科技有限公司 一种清蜡球自动接收装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5858114A (en) * 1993-10-29 1999-01-12 Board; Alan Edwin Method and apparatus for cleaning liquid dispensing systems
DE4403222C2 (de) * 1994-02-03 1997-01-16 Friedrich Bersch Vorrichtung zur Dokumentation der Reinigungszyklen bei der Reinigung einer Mehrzahl von Getränkeleitungen
RU2184001C2 (ru) * 2000-01-06 2002-06-27 Омский государственный аграрный университет Способ мойки технологических аппаратов и трубопроводов

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE689234C (de) * 1935-01-27 1940-03-14 Paul Wagner Vorrichtung zum Reinigen von Roehren
FR1597193A (enrdf_load_stackoverflow) * 1968-11-27 1970-06-22
US3983895A (en) * 1975-04-17 1976-10-05 Marathon Oil Company Pump station bypass system
NL7714605A (en) * 1977-12-30 1979-07-03 Veco Beheer Electro Photo Purging system for pipe network of food processing plant - has timing pulse generator counters producing addresses for control memories
GB2095407B (en) * 1981-03-24 1984-10-17 Ferranti Ltd Valve status indicator
DE3347003C2 (de) * 1983-12-24 1986-12-18 Friedrich 5401 Halsenbach Bersch Verfahren und Vorrichtung zum Reinigen von Rohrleitungen, insbesondere Schankleitungen
DE3347004C1 (de) * 1983-12-24 1985-06-05 Friedrich 5401 Halsenbach Bersch Vorrichtung zur Reinigung von Rohrleitungen,insbesondere Schankleitungen
US4590963A (en) * 1985-04-03 1986-05-27 Combustion Engineering Co., Inc. Method of and apparatus for determining the position of a movable member

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102658276A (zh) * 2012-05-18 2012-09-12 西安威正电子科技有限公司 一种清蜡球自动接收装置

Also Published As

Publication number Publication date
DE3824852A1 (de) 1990-01-25
DE58905745D1 (de) 1993-11-04
ATE95088T1 (de) 1993-10-15
ES2045277T3 (es) 1994-01-16
EP0351652A2 (de) 1990-01-24
DE3824852C2 (enrdf_load_stackoverflow) 1991-06-13
EP0351652A3 (en) 1990-12-12

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