EP3782742A1 - Dispositif de nettoyage et procédé de nettoyage - Google Patents

Dispositif de nettoyage et procédé de nettoyage Download PDF

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Publication number
EP3782742A1
EP3782742A1 EP19020493.3A EP19020493A EP3782742A1 EP 3782742 A1 EP3782742 A1 EP 3782742A1 EP 19020493 A EP19020493 A EP 19020493A EP 3782742 A1 EP3782742 A1 EP 3782742A1
Authority
EP
European Patent Office
Prior art keywords
cleaning
cleaning liquid
gas bubble
cleaning device
narrow
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.)
Pending
Application number
EP19020493.3A
Other languages
German (de)
English (en)
Inventor
Joachim Rohmann
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.)
Wattec GmbH
Original Assignee
Wattec GmbH
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 Wattec GmbH filed Critical Wattec GmbH
Priority to EP19020493.3A priority Critical patent/EP3782742A1/fr
Publication of EP3782742A1 publication Critical patent/EP3782742A1/fr
Pending 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
    • B08B9/0323—Arrangements specially designed for simultaneous and parallel cleaning of a plurality of conduits
    • 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
    • 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
    • B08B9/0326—Using pulsations
    • 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
    • B08B9/0328—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 by purging the pipe with a gas or a mixture of gas and liquid

Definitions

  • the present invention relates to a cleaning device and a cleaning method for cleaning a narrow, curved duct.
  • a cleaning device for narrow channels, pipes and lines, in particular cannulas, catheters and endoscopes comprises a housing with a rinsing space which accommodates a distribution chamber.
  • the distribution chamber has a medium inlet, which is connected to a cleaning fluid supply, and a medium outlet which has several connection ports.
  • the cannulas, catheters and endoscopes to be cleaned are interchangeably arranged at the connection connections.
  • the housing also provides a collecting pot in which the cleaning liquid collects after use. By means of a pump, the collected cleaning liquid is conveyed through a cleaning feed line and through several filters in one direction at 0.5 bar.
  • the cleaning device has a compressed air supply line which opens into the cleaning supply line.
  • the compressed air supply line is connected on the other side to a compressed air source.
  • an inlet valve is opened, as a result of which compressed air flows at 5 bar through the compressed air supply line into the cleaning liquid supply line and causes a pressure surge within the cleaning liquid.
  • a two-phase cleaning medium is created from cleaning liquid on the one hand and compressed air on the other, which due to its phase boundaries mechanically acts on dirt to be removed on the inner surface of the cannulas, catheters and endoscopes.
  • the known method comprises a pulse-wise application of gas or a gas mixture to a line, which is at least partially filled with liquid, with a specific number of pulses, with a specific pulse interval between two pulses.
  • the object of the invention is to provide an improved cleaning device and an improved cleaning method for cleaning a narrow, curved channel.
  • a cleaning device for cleaning a narrow, curved channel which in particular comprises a liquid pump in order to convey a cleaning liquid.
  • the liquid pump can be controlled in such a way that it conveys the cleaning liquid with varying pressure.
  • the cleaning device can comprise a gas bubble generating device for generating gas bubbles, the cleaning device being designed in particular in such a way that it generates gas bubbles of variable size and mixes them with the cleaning liquid to form a gas bubble-cleaning liquid mixture around the narrow, curved channel with the gas bubble -Clean cleaning liquid mixture.
  • liquid pump includes in particular a working machine for conveying a liquid or an incompressible fluid, for example a centrifugal pump.
  • the liquid pump can be driven by an electric motor, the speed of which can be set variably by an electric speed control device or an electric speed regulator can.
  • the pressure of the cleaning liquid delivered depends preferably on the speed of the electric motor of the liquid pump.
  • the cleaning liquid comprises in particular water, acid, alkali and / or mixtures thereof.
  • the gas bubbles are in particular air bubbles.
  • the gas bubbles have, for example, a diameter or a size in a range from 0.5 to 8 mm.
  • the expression gas bubbles of variable size means that the cleaning device generates gas bubbles of essentially the same first size at a first point in time or for a first period of time, while the cleaning device generates gas bubbles of essentially the same second size at a second point in time or for a second period of time generated, wherein the first size is not equal to the second size, ie the size is varied.
  • the cleaning device can produce gas bubbles of varying sizes, i.e. gas bubbles of different sizes at the same time or for a period of time.
  • the varying size of the gas bubbles can be generated, for example, by a compressor with controllable compression and / or by the varying pressure of the cleaning liquid.
  • the gas bubble cleaning liquid mixture can comprise a gas bubble cleaning liquid foam, a gas bubble cleaning liquid mist and / or a gas bubble cleaning liquid vapor.
  • the term channel preferably includes a tube, a pipe, an opening and in particular a cooling channel of an injection molding tool, the channel having a first end or a first opening and another end or a second opening.
  • the term narrow means in particular that the length of the narrow channel is greater than its cross-sectional area or its diameter.
  • the diameter of a narrow channel is in a range from 6.35 to 25.4 mm, while its length can typically be over 100 mm or even over 500 mm.
  • the term curved preferably means a channel which does not run in a straight line but has at least one bend, curvature, angle or the like.
  • Injection molding tools can have one or more cooling channels, for example in order to achieve faster cooling of the injection molding tool or an injection-molded plastic part. Short cooling times are usually preferred in order to achieve faster cycle or manufacturing cycles in plastic parts production. Lime deposits, corrosion or contamination (hereinafter generally referred to as contamination) can reduce the diameter of the cooling channels over time, which means that a coolant pumped through the cooling channels can dissipate less heat from the injection molding tool or the plastic part and / or a lower flow rate, ie Volume flow is achieved.
  • 3D-printed injection molding tools has recently made it possible, among other things, to manufacture injection molding tools with complexly shaped, curved or angled cooling channels.
  • a typical drilling out of a soiled, curved cooling channel with a conventional drill in order to remove the soiling is only insufficiently possible because of the curvature.
  • Manual cleaning is possible, but mostly time-consuming, expensive and does not achieve a repeatable and / or no measurable cleaning result. Manual cleaning can also be harmful to the environment and health.
  • the varying pressure of the cleaning liquid can cause turbulence in the cleaning liquid which, compared to a laminar flow of the cleaning liquid caused by constant pressure, achieve a better detachment of dirt on an inner wall of the narrow, curved channel.
  • the gas bubbles in the gas bubble / cleaning liquid mixture essentially cause phase transitions between liquid and gas and, by means of the whirling cleaning liquid, in particular cause dirt to be brushed off.
  • Gas bubbles with a diameter or a size in a range from 0.5 to 2 mm are referred to below as small, while those in the range from 5 to 8 mm are referred to as large. Large gas bubbles cause dirt to be brushed off gently or more gently; small gas bubbles cause a hard or powerful brushing off of dirt.
  • Conventional cleaning devices and methods generally do not provide any gas bubbles of variable size and, in particular, do not mix such size-varying gas bubbles with a pressure-varying cleaning liquid.
  • the gas bubble generating device can comprise a compressed air connection, a compressed air container and / or a compressed air compressor.
  • a compressed air connection is often available in plastic parts production, to which the cleaning device according to the invention can be connected with its compressed air connection in order to generate gas bubbles.
  • the compressed air tank can buffer compressed air or compensate for pressure fluctuations.
  • the compressed air compressor can advantageously make the cleaning device independent of a compressed air connection.
  • the air compressor includes, in particular, a compressor with controllable compression. The compressor can in particular be controlled in such a way that it generates the gas bubbles of varying sizes.
  • the gas bubble generating device has, in particular, a gas bubble blowing device which blows the gas bubbles into the cleaning liquid and can thereby generate the gas bubble / cleaning liquid mixture.
  • the gas bubble injection device comprises, for example, a hollow body with a plurality of bores, wherein the bores have different diameters in a range from 0.1 to 0.5 mm.
  • the hollow body can comprise a ball that is hollow inside.
  • the hollow body preferably includes the compressed air connection and / or can be connected to the compressed air reservoir and / or to the compressed air compressor. Compressed air fed into the hollow body can escape through the bores.
  • the hollow body is in particular immersed in the cleaning liquid conveyed under varying pressure, so that the escaping compressed air can emerge from the hollow body in the form of gas bubbles and mix with the cleaning liquid flowing past.
  • the different diameters of the holes basically allow gas bubbles of different sizes to arise.
  • the cleaning device according to the invention can have a flow rate measuring device, i.e. a volume flow measuring device, downstream of the liquid pump, which measures a flow rate, i.e. a volume flow, of the cleaning liquid or the gas bubble-cleaning liquid mixture.
  • a flow rate measuring device i.e. a volume flow measuring device
  • the flow rate measuring device measures in particular the flow rate of the gas bubble-cleaning liquid mixture; if it is arranged upstream of the gas bubble injection device, it measures in particular the flow rate of the cleaning liquid.
  • the cleaner a narrow, curved channel was cleaned, the higher the flow rate of the cleaning liquid or the gas bubble-cleaning liquid mixture is in general.
  • the flow rate measuring device a cleaning progress and / or cleaning degree of the narrow, curved channel can thus advantageously be determined.
  • the flow rate is preferably in a range between 1 l / min and 75 l / min.
  • the cleaning device generally comprises a pressure measuring device downstream of the liquid pump, the pressure measuring device measuring a pressure of the cleaning liquid.
  • the pressure measuring device and the liquid pump can form a pressure control circuit in order to be able to generate, in particular, a predetermined pressure of the cleaning liquid.
  • the pressure of the cleaning liquid is preferably in a range between 1.5 and 4.5 bar.
  • the liquid pump varies the pressure continuously or in an oscillating manner in the range between 1.5 and 4.5 bar.
  • the pressure variation can be measured over time, e.g. sinusoidal, sawtooth or triangular.
  • the cleaning device according to the invention can comprise a container downstream of the narrow, curved channel, the container serving in particular to collect and decompress the gas bubble-cleaning liquid mixture and / or contamination from the narrow, curved channel.
  • the liquid pump, the pressure sensor, the gas bubble generating device, the flow rate measuring device, a first connection for connection to a first opening of the narrow, curved channel, a second connection for connection to a second opening of the narrow, curved channel and the container can according to a further Embodiment, in particular in the order mentioned, form a fluid circuit.
  • the cleaning device can furthermore have a flow direction change unit in order to change the flow direction of the cleaning liquid or the gas bubble / cleaning liquid mixture.
  • the flow direction changing unit can enable cleaning of the narrow, curved channel in two directions or in a forward and a backward direction. The cleaning in the forward and backward directions generally improves a cleaning result, reduces clogging of the narrow, curved channel and / or shortens a cleaning time.
  • the flow direction changing unit during a cleaning process can change the direction continuously in a specific rhythm.
  • the cleaning device according to the invention can have at least two fluid circuits for cleaning at least two narrow, curved channels. The cleaning machine according to the invention with several fluid circuits can thus more quickly clean several cooling channels of an injection molding tool. Even more preferably, the cleaning device comprises four fluid circuits.
  • the container can be a filter.
  • the filter can be used for ventilation and as a splash guard for cleaning liquid.
  • the filter can also reduce or prevent odors and / or gases from escaping from the cleaning liquid.
  • the container is preferably open on the lid side in order to collect and decompress the gas bubble / cleaning liquid mixture emerging from the narrow, curved channel. In the container, dirt released from the narrow, curved channel can settle on a container bottom due to gravity. After the contamination has settled and the gas bubbles have outgassed, there is essentially again cleaning liquid which the liquid pump can return to the fluid circuit, ie in particular reuse it. At the same time, the gas bubbles can outgas from the gas bubble-cleaning liquid mixture.
  • the container can further comprise a heating device for heating the cleaning liquid.
  • the heating device comprises in particular an electrically operated heating resistor whose heating power can be controlled.
  • the container can comprise a temperature sensor for measuring a temperature of the cleaning liquid.
  • the temperature sensor and the heating device can form a temperature control circuit in order to achieve a predeterminable temperature of the cleaning liquid.
  • the container can comprise a pH value sensor for measuring a pH value of the cleaning liquid.
  • the cleaning device can indicate this; stop a cleaning process; Indicate the complete or partial replacement of the cleaning fluid and / or add concentrated or new cleaning fluid or replace it with used cleaning fluid.
  • the cleaning liquid can be neutralized for disposal, the pH value sensor monitoring the neutralization.
  • a cleaning device 100 for cleaning a cooling channel 102 of an injection molding tool 104 according to an exemplary embodiment of the invention is shown.
  • the cleaning device 100 comprises a fluid circuit 106, which is indicated by arrows.
  • the tip of the arrows of the fluid circuit 106 point in a flow direction, ie downstream; the ends of the arrows point in an opposite direction of flow, ie upstream.
  • the cleaning device 100 further comprises a centrifugal pump 108 with an electronic speed control for controllably conveying a cleaning solution 109 along a pipe 107; a pressure sensor 110 disposed downstream of centrifugal pump 108; a hollow plastic body 112 with a plurality of bores 114 which have different diameters in a range between 0.1 and 0.5 mm and which are arranged in the first pipeline, the hollow plastic body 112 being connected to a compressed air connection 116 or alternatively to a compressed air reservoir 118 or a compressed air compressor 120 is connected; a volume flow meter 122 to which the pipeline 107 is connected; a pipeline 124 connected to the volume flow meter 122; a directional control valve 125 with four connections, the pipeline 124 being connected to a first connection of the directional control valve 125; a second connection 126 which can be connected to a first opening of the cooling channel 102 via a hose line 127; a third connection 128 of the directional control valve 125, which can be connected to a second
  • the container 132 includes a filter 134 on the cover side.
  • the container 132 also includes a temperature sensor T, a pH value sensor pH and an electrically operated heating coil 138.
  • the centrifugal pump 108 and the container 132 are connected by means of a pipeline 140.
  • the injection molding tool 104 and the cooling channel 102 are produced by means of an additive manufacturing process.
  • the cooling channel 102 has a diameter of 5 mm, that is to say it is narrow, and has several bends in which soiling is formed by storage, by cooling liquid and / or by corrosion.
  • the cleaning device 100 is able to loosen this contamination and to transport it away.
  • the cleaning device 100 is first connected to the cooling channels.
  • the centrifugal pump 108 conveys the cleaning solution 109 at a pressure oscillating between 1.5 and 4.5 bar.
  • the centrifugal pump 108 is equipped with a 3-phase, fan-cooled permanent magnet synchronous motor.
  • the centrifugal pump 108 has a frequency converter and PI controller, which are arranged in a terminal box of the centrifugal pump 108.
  • the pressure sensor 110 together with the centrifugal pump 108, forms a pressure control circuit in order to be able to generate the oscillating pressure in a controllable manner.
  • the centrifugal pump 108 conveys the cleaning solution 109 through the pipeline 107 to the plastic hollow body 112 arranged in the pipeline, which is also referred to as the injection point and from whose bores compressed air flows in the form of gas bubbles.
  • the plastic hollow body is spherical with a diameter of 10 mm and made of acid-resistant PVC.
  • the cleaning solution 109 mixes with the gas bubbles to form a cleaning solution / gas bubble mixture.
  • the diameter of the gas bubbles can be varied from 0.5 to 8 mm, gas bubbles with a diameter or a size in a range from 0.5 to 2 mm being referred to below as small while those in the range of 5 to 8 mm are called large.
  • the pressure conveys the cleaning solution / gas bubble mixture through the volume flow measuring device 122, which determines a volume flow of the cleaning solution / gas bubble mixture. If the volume flow is below an adjustable threshold value, the cooling channel 102 is still considered to be soiled and cleaning is continued.
  • the pressure then conveys the cleaning solution / gas bubble mixture further through the pipeline 124 to the first connection of the directional valve 125.
  • the directional valve 125 is set such that it connects the first connection to the second connection 126, so that the pressure carries the cleaning solution -Gas bubble mixture continues through the hose line 127 to the first opening of the cooling channel 102.
  • the cleaning solution / gas bubble mixture arriving in the cooling channel 102 causes, through the combination of the cleaning solution, the oscillating pressure and the gas bubbles, a better detachment of the dirt in the narrow, curved cooling channel 102 than conventional cleaning devices and methods.
  • the pressure conveys the cleaning solution-gas bubble mixture together with the detached contaminants from the second opening of the cooling channel 102 and through the hose line 129 to the third connection 128 of the directional valve 125.
  • the directional valve 125 is set in the first state so that it connects the third connection 128 connects to the fourth connection, so that the cleaning solution-gas bubble mixture together with the detached contaminants are conveyed through the pipeline 130 and finally into the container 132. Since the container 132 is not hermetically sealed, but has the cover-side filter 134, the cleaning solution-gas bubble mixture decompresses in the container 132, ie the gas bubbles escape through the filter 134 and the cleaning solution 109 is created again be sedimented on the bottom of the container 132 as dirt sediment 136.
  • the pH value sensor pH therefore determines the pH value of the cleaning solution 109.
  • Chemical reactivity of the cleaning solution 109 depends on the temperature the cleaning solution 109 from.
  • the heating coil 138 heats the cleaning solution 109 to a predetermined temperature.
  • the temperature sensor T forms a temperature control loop with the heating coil 138 in order to control the predeterminable To be able to adjust the temperature.
  • the centrifugal pump 108 sucks in the cleaning solution 109 from the container 132 via the pipeline 140 and feeds it back to the fluid circuit 106.
  • the cleaning device 100 also shows a fresh water connection, a waste water drainage tap and a high voltage connection.
  • the directional control valve can be set so that the first connection is connected to the third connection 128 and the fourth connection is connected to the second connection 126, ie the cooling channel 102 is cleaned in a different flow direction.
  • the direction of flow is continuously changed in a certain rhythm. This avoids clogging of the cooling channel and / or the cleaning device.
  • a continuous change in the direction of flow causes the cleaning liquid 109 to be mixed.
  • the cleaning device 200 comprises eight connections 202 to 216 in order to be connected to the channels via hose lines.
  • the eight connections 202 to 216 can be connected to one or more fluid circuits 106 via a directional control valve.
  • the cleaning device 200 also includes a programmable logic controller with a touchscreen 218.
  • the programmable logic controller has several sensor inputs and control outputs, an operating system and an interface via which a user program can be loaded.
  • the user program defines how the control outputs are switched depending on the sensor inputs.
  • the sensor inputs are in particular connected to the pressure sensor 110, the volume flow measuring device 122, the temperature sensor T and the pH value sensor pH, see Fig. 1 , electrically connected.
  • the control outputs are in particular electrically connected to the frequency converter of the centrifugal pump 108, the directional control valve 125 and the heating coil 138.
  • the cleaning device 200 can be mounted on a flat pallet 220.
  • the cleaning device 200 has a maximum width of 800 mm and a maximum length of 1200 mm.
  • the cleaning device 200 can have integrated recesses for receiving fork prongs. These configurations allow simple transport by means of a floor conveyor with fork prongs to an injection molding tool for a cleaning process and simple stowage of the cleaning device 200 when not in use, for example on a pallet space in a high-bay warehouse.
  • a cleaning method 300 according to an exemplary embodiment of the invention is shown.
  • cleaning fluid with varying pressure is conveyed by means of a controllable fluid pump.
  • gas bubbles are generated with a gas bubble generation device.
  • the size of the gas bubbles is varied by means of the varying pressure of the cleaning liquid.
  • the gas bubbles and the cleaning liquid are mixed to form a gas bubble / cleaning liquid mixture.
  • the narrow, curved channel is cleaned by means of the gas bubble cleaning liquid mixture.
  • the gas bubble size is adjusted depending on the cross-sectional area of the narrow, curved channel.
  • the cleaning liquid is neutralized with a neutralizing agent after use and then disposed of.
  • the liquid pump can deliver fresh water in order to use the volume flow meter 122, see FIG Fig. 1 to be able to carry out a leak test of the cleaning device.
  • the programmable logic controller can store a cleaning report for a cleaned injection molding tool after cleaning has been completed, the report comprising volume flows of injection molding tool cooling channels achieved by the cleaning and an injection molding tool identifier.
  • all elements of the cleaning device 100 that carry cleaning liquid and cleaning solution / gas bubble mixture are manufactured from stainless steel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP19020493.3A 2019-08-23 2019-08-23 Dispositif de nettoyage et procédé de nettoyage Pending EP3782742A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19020493.3A EP3782742A1 (fr) 2019-08-23 2019-08-23 Dispositif de nettoyage et procédé de nettoyage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19020493.3A EP3782742A1 (fr) 2019-08-23 2019-08-23 Dispositif de nettoyage et procédé de nettoyage

Publications (1)

Publication Number Publication Date
EP3782742A1 true EP3782742A1 (fr) 2021-02-24

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EP19020493.3A Pending EP3782742A1 (fr) 2019-08-23 2019-08-23 Dispositif de nettoyage et procédé de nettoyage

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EP (1) EP3782742A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114643237A (zh) * 2022-03-31 2022-06-21 中国科学院空间应用工程与技术中心 一种气液混合回收式多余物冲洗装置及方法
DE102020134724A1 (de) 2020-12-22 2022-06-23 Oetzel Wasserhygiene GmbH Systemspülanlage zum spülen von rohrleitungen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE67368C (de) 1892-02-10 1893-02-16 O. hering in Berlin SW., Lankwitzstrafse 9 Verfahren zur Entfernung der festen Schlammniederschläge aus Rohrleitungen durch Einführung eines Stromes nicht condensirender Gase
GB2289512A (en) * 1994-05-16 1995-11-22 Lawrence Ralph Dawson Cleaning tubular elements
US20030051746A1 (en) * 2001-09-20 2003-03-20 Asia Union Co., Ltd. & Kwang-Jin Park Water hammer cleaning machine
EP2716208A1 (fr) 2012-10-05 2014-04-09 Miele & Cie. KG Dispositif de nettoyage de canaux, tuyaux, conduites étroits ou analogues
EP2815816A1 (fr) 2013-06-20 2014-12-24 Hammann GmbH Procédé et dispositif d'optimisation du nettoyage de conduites ou d'installations traversées par du liquide
EP3446787A1 (fr) 2017-08-26 2019-02-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé et dispositif de génération d'une séquence de sections du jet de fluide modifié, discontinu

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE67368C (de) 1892-02-10 1893-02-16 O. hering in Berlin SW., Lankwitzstrafse 9 Verfahren zur Entfernung der festen Schlammniederschläge aus Rohrleitungen durch Einführung eines Stromes nicht condensirender Gase
GB2289512A (en) * 1994-05-16 1995-11-22 Lawrence Ralph Dawson Cleaning tubular elements
US20030051746A1 (en) * 2001-09-20 2003-03-20 Asia Union Co., Ltd. & Kwang-Jin Park Water hammer cleaning machine
EP2716208A1 (fr) 2012-10-05 2014-04-09 Miele & Cie. KG Dispositif de nettoyage de canaux, tuyaux, conduites étroits ou analogues
EP2815816A1 (fr) 2013-06-20 2014-12-24 Hammann GmbH Procédé et dispositif d'optimisation du nettoyage de conduites ou d'installations traversées par du liquide
EP3446787A1 (fr) 2017-08-26 2019-02-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé et dispositif de génération d'une séquence de sections du jet de fluide modifié, discontinu

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020134724A1 (de) 2020-12-22 2022-06-23 Oetzel Wasserhygiene GmbH Systemspülanlage zum spülen von rohrleitungen
CN114643237A (zh) * 2022-03-31 2022-06-21 中国科学院空间应用工程与技术中心 一种气液混合回收式多余物冲洗装置及方法

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