EP3020485A1 - Systeme racleur - Google Patents

Systeme racleur Download PDF

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Publication number
EP3020485A1
EP3020485A1 EP15003127.6A EP15003127A EP3020485A1 EP 3020485 A1 EP3020485 A1 EP 3020485A1 EP 15003127 A EP15003127 A EP 15003127A EP 3020485 A1 EP3020485 A1 EP 3020485A1
Authority
EP
European Patent Office
Prior art keywords
pig
station
pipe
channel
changing device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15003127.6A
Other languages
German (de)
English (en)
Other versions
EP3020485B1 (fr
Inventor
Sven Nowroth
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.)
Eisenmann SE
Original Assignee
Eisenmann SE
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 Eisenmann SE filed Critical Eisenmann SE
Publication of EP3020485A1 publication Critical patent/EP3020485A1/fr
Application granted granted Critical
Publication of EP3020485B1 publication Critical patent/EP3020485B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1481—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air

Definitions

  • Pigging systems for transporting liquid or pasty substances are widely used in industry, but especially in painting technology, where they are primarily used in supply units for application devices. There they are used, inter alia, for the transport of paint between paint-carrying ring lines of the spray booth and the application device.
  • Newts are subject to natural wear, causing them to leak after a period of operation and leak along them. They must then be replaced. This should be possible in the shortest possible time and possibly also automatically, so that expensive downtimes of the system are avoided as far as possible.
  • a pig exchange station is provided, which is located outside the path of movement of the pig between the two stops in the two pig stations and contains a variety of positions in which newts, new or defective, can be stored.
  • This external pig change station is connected via a line or a hose to the pig station.
  • the pig channel in this pig station is closed by a plug on which the pig moving in the pig system finds a stop.
  • This plug is thus one of the two stops of the pigging system.
  • this plug is removed by a corresponding mechanism and leading to the pig change station hose is brought into communication with the pig channel, so that now the broken pig can be moved out and transported to a position of the pig change station.
  • a new, functioning pig is then introduced in the opposite direction in the pig channel of the pig station and the pig channel is closed again by the stopper. In this way, a lot of pigs can be introduced into the pigging system, which ensures very long service lives.
  • this mechanism is quite complicated and the times required for pigging are not insignificant.
  • Object of the present invention is to provide a pigging system of the type mentioned, with a worn or otherwise broken pig can be replaced in a very short time and with little equipment expense by another pig.
  • the pig changing device is not provided outside the "normal" movement path of the pig between the two stops, as in the above-mentioned DE 10 2004 037 247 B4 the case is and where to replace the pig first a sealing plug must be removed and then replaced. Instead, the replacement of the pig within the path of movement between the two stops, so that a removal of a stop is not required.
  • Due to the design of the movable element of the pig exchange device with two pig scans it is possible to a pig from the between remove the two attacks lying, the transport of the liquid or pasty substance serving movement path and instead introduce into another path of movement, over which the pig can be removed. In this movement, so two pig shots exchange their place. It is possible to introduce a new pig into the "normal" path of movement simultaneously with the removal of a defective pig.
  • the pig exchange device is arranged within the pig pipe and has at least one sensor that signals the presence of a pig, such that the pig can be stopped in the pig changing device.
  • the function of this embodiment is thus such that the central control of the pigging system stops the supply of the pushing medium, which carries the pig through the pig pipe, and stops the pig in the pig station when the corresponding sensor emits a signal. Then the movable element of the pig station can come into operation.
  • This embodiment of the invention is particularly suitable for retrofitting existing pigging systems.
  • the pig changer may also be housed in a pig station. This facilitates the pig-changing operation, because in the pig station the pig comes to a halt anyway at the end of its movement. This stop can then be used if necessary to change the pig by activating the pig changer.
  • the stop of the pig connected to the pig station in question is arranged at the end of the reception of the pig changing device.
  • the pig no longer emerges from receiving the pig changing device.
  • the movable element of the pig changer can be linearly displaceable.
  • the movable element of the pig changer is formed similar to the drum of a drum turret and rotatable about an axis which is parallel to the axis of the receptacle. In this way, a larger number of receptacles for pigs can be accommodated in the pig changer without the space required increases too much. In addition, rotational movements are easier to achieve than linear movements.
  • FIG. 1 Reference is made, in which - in part schematically - an entire pigging system is shown, as it can be used to supply the paint of a high-rotation atomizer.
  • the pigging system is designated overall by the reference numeral 1. It comprises, in a manner known per se, a first pig station 3, a second pig station 4, and a pig pipe 2 connecting the two pig stations 3, 4, which is subdivided into two sections 2a and 2b for reasons which will become clearer below.
  • FIG. 1 left pig station 3 is preceded by a color changer 5, the different media, in particular different colors of ring lines that can be supplied to the spray booth 3. From there, the selected medium can then with the help of a pig 13 via the pig pipe 2 to in FIG. 1 right pig station 4 are transported. From the pig station 4, the conveyed medium passes first into a metering device 6 and from there to a high-speed sprayer 7 delivering the paint to a workpiece.
  • the two pig stations 3 and 4, the color changer 5, the metering device 6 and the high-rotation atomizer 7 can be of any known construction have. This also applies to the pig pipe 2, except that it is divided into two sections 2a and 2b.
  • the reason for the subdivision of the pig pipe 2 in said sections 2a, 2b is that between the sections 2a and 2b, a pig changing device, indicated generally by the reference numeral 8 is inserted, which will be described in more detail below.
  • the pig changing device 8 is similar in construction to the drum of a revolving drum. It comprises a movable element 31 with a hub part 9, which is rotatable about a dash-dotted line indicated axis 10 by motor.
  • the hub part 9 is connected via radially extending connecting pieces 11 with short, parallel to each other and to the axis 10 extending pipe sections 12 in connection whose inner diameter corresponds to the inner diameter of the pig pipe 2 and which can each serve as a receptacle for a pig 13. At least two such pipe sections 12 are provided.
  • pig 13 In normal operation of the pigging system 1, the ends of the sections 2 a, 2 b of the pig pipe 2 are at the opposite ends of one of the pipe sections 12, as in FIG. 1 is shown.
  • a pig 13 is shown, which is about to pass a pipe section 12 on the way between the two pig stations 3, 4, for example, from left to right.
  • this pig 13 thus traverses, on the way from left to right in FIG. 1, the section 2a of the pig pipe 2, the pipe section 12 and then the section 2b of the pig pipe 2, first the section 2b of the pig pipe 2 on the return path , the pipe section 12 and the section 2a of the pig pipe 2.
  • the function of in FIG. 1 Thus, pig system 1 shown so far differs in any way from that of known pigging systems.
  • the lower tube section 12 of the pig changer 8 can be from one side, in FIG. 1 From the left, pressurize via a nozzle 32 with a sliding medium, so that a pig 13 located in this pipe section 12 from the pipe section 12 to the other end, in the example to the right, can be expelled.
  • the pig 13 has a known construction. He is waisted in the middle, so that in both end regions respectively on the inner circumferential surface of the pig pipe 2 and the pipe section 12 adjacent sealing lips arise. On a front side of the pig 13 is provided with a projection 13a, whose function is initially irrelevant here.
  • the movable member 31 of the pig exchanger 8 is rotated about the axis 10 by such an angle that the pipe provided with the new pig 13 12 inserted between the two pig pipe sections 2a and 2b and the worn pig 13 containing pipe section 12 between the nozzle 32nd and the end of the pig pipe 33 comes to rest. If only two pipe sections 12 are used, which are diametrically opposed, this angle is 180 °. The "normal operation" of the pig system 1 can again be resumed. For this purpose, the new pig 13 is driven from the pig changing device 8 in the pig station 3, where it can then be used again to transport the respective desired medium.
  • the worn pig 13 located in the lower pipe section 12 is "shot out” into the pig pipe 33 and disposed of there or placed in a magazine.
  • the pig change described is not limited to cases in which the pig 13 is worn and must be replaced by a new one.
  • a pig change is also conceivable when a color change has taken place. Then, a pig can be provided for each color in a connected pig magazine, which is introduced if necessary by means of pig exchange device 8 in the pig line 2.
  • FIG. 2 shows a section of an alternative pigging system. Parts corresponding to those of the embodiment of FIG. 1 are denoted by the same reference numeral plus 100.
  • FIG. 2 the color changer 105, the pig station 103, the left end of the pig line 102 and a pig changer 108 can be seen. While in the embodiment of FIG. 1 the pig changing device 8 was arranged at an arbitrary position in the pig pipe 2, the pig changer 108 is in the embodiment of the FIG. 2 within a corresponding cavity in the housing 103a of the pig station 103.
  • the movable element 131 of the pig exchange station 108 is designed as a disc which is rotatable about an axis 110 by motor.
  • the axis 110 is again shown only schematically by a dash-dotted line.
  • the pig changer 108 is thereby formed similar to a drum of a revolver drum that it has a plurality of circular cylindrical bores 112 parallel to each other and to the rotation axis 110, which function in the interiors of the pipe sections 12 in the embodiment of FIG. 1 similar, so can serve as recordings for newts 113.
  • the rotational position of the disk-shaped movable element 131 is such that in "normal operation" one of the bores 112 is coaxial with the end of the pig pipe 102 inserted into the housing 103a of the pig station 103 and communicates with this end via a cavity 125 in the housing 103a of the pig station 103 , In this way, a pig 113, which enters via the pig 102 into the pig station 103, get into the interior of the bore 112, as in FIG. 2 is shown.
  • the cavity 125 serves in this way together with the upper bore 112 as a pig channel of the pig station 103rd
  • the holes 112 are not through holes. Rather, they have at the end of which the pig 102nd facing away, a radially inwardly projecting stop 112a, as in particular the FIG. 3 can be seen.
  • This stop 112a ensures that the movement of the pig 113 in FIG. 2 to the left, so away from the pig 102, by abutting the projection 113 a of the pig 113 at this stop 112 a finds its end.
  • the stop 112a as well as the FIG. 3 can be seen, a small through hole 112 b, which is coaxial with the bore 112.
  • a relatively narrow nozzle 120 is brought close to the through hole 112b of the stopper 112a.
  • a through-bore 122 with a slightly larger cross section than that of the bore of the nozzle 120 passes through the body of the nozzle 120 parallel to the axis of the media channel 121 and thus the bore of the nozzle Nozzle 120.
  • underlying hole 112 of the pig exchanger 108 communicates at its in FIG. 2 right side with a channel 123 in the housing 103a of the pig station 103, to which a further, leading to a pig change magazine or the like pig pipe can be connected.
  • FIG. 2 Another, to in FIG. 2 lower bore 112 and channel 123 coaxial, narrow channel 124 in the housing 103 a is used to supply a push medium, as will become more apparent below.
  • FIG. 2 upper area of the pig station 103 a controllable connection 124 can be seen, via which a medium can be entered if necessary in the cavity 125 within the housing 103 a of the pig station 103.
  • This cavity 125 bridges, like the FIG. 2 can be seen, in the upper region, the movable member 131 of the pig exchanger 108th
  • the pig 113 can be set in motion, that on the media channel 121 of the color changer 105, the nozzle channel of the nozzle 120 and the through hole 122 color under pressure on the in FIG. 2 left end face of the pig 113 is given.
  • Appropriate coordination of the cross sections of the nozzle channel of the nozzle 120 and the through hole 120 is achieved that the pig 113 is first pushed out of the bore 112 of the pig exchanger 108 out into the pig 102, before then the color also follows through the through hole 122.
  • the paint now pushes the pig 113 through the pig pipe to the not shown further pig station at the other end of the pig 102nd
  • the second pig station is designed in a conventional manner. The removal of the paint thus takes place there, as is known from the prior art. The same applies to the return of the pig 113 from the second pig station in the opposite direction through the pig pipe 102 until the pig 113 is again in the in FIG. 2 shown position within the upper bore 112 of the pig changer 108 has arrived.
  • the broken newt in the in FIG. 2 Lower bore 112 is via sliding medium, which is the channel 124 in the housing 103 a of the pig station 103, in the channel 123 and then ejected via the connected pig pipe in the pig magazine, not shown.
  • the pig 113 can be replaced if a color change is to be made without the pig 113 therefore being worn.
  • the number of receptacles for pigs in the respective movable element 31 or 131 of the pig change station 8 and 108 may of course be greater than two.
  • FIG. 4 an example is shown in side view, in which four receptacles 212 are provided for pigs.
  • the nozzle 120 acts in this case as a stop for the pig 113, the projection 113a is advantageously provided with a flat end face.
  • a pig change does not necessarily wait until a pig defect is detected.
  • a pig change can also be made as a precaution after a certain number of pig movement cycles.

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  • Pipeline Systems (AREA)
EP15003127.6A 2014-11-13 2015-10-31 Systeme racleur Active EP3020485B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014016717.8A DE102014016717A1 (de) 2014-11-13 2014-11-13 Molchsystem

Publications (2)

Publication Number Publication Date
EP3020485A1 true EP3020485A1 (fr) 2016-05-18
EP3020485B1 EP3020485B1 (fr) 2020-12-02

Family

ID=54478541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15003127.6A Active EP3020485B1 (fr) 2014-11-13 2015-10-31 Systeme racleur

Country Status (2)

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EP (1) EP3020485B1 (fr)
DE (1) DE102014016717A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2662621A1 (fr) * 1990-05-31 1991-12-06 Elf Aquitaine Unite de raclage automatisee.
US6412135B1 (en) * 2001-03-21 2002-07-02 Robert A. Benson Exchanger of wall clearing shuttles
DE102004037247B4 (de) 2004-07-31 2006-04-27 Eisenmann Lacktechnik Gmbh & Co. Kg Versorgungseinheit für eine Applikationseinrichtung und Verfahren zum Betreiben einer solchen
US20060175063A1 (en) * 2004-12-20 2006-08-10 Balkanyi Szabolcs R Method and apparatus for a cold flow subsea hydrocarbon production system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US597185A (en) * 1898-01-11 Hose-cleaner
DE10064065B4 (de) * 1999-12-22 2006-07-27 Dürr Systems GmbH Beschichtungssystem für die automatisierte Beschichtungstechnik

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2662621A1 (fr) * 1990-05-31 1991-12-06 Elf Aquitaine Unite de raclage automatisee.
US6412135B1 (en) * 2001-03-21 2002-07-02 Robert A. Benson Exchanger of wall clearing shuttles
DE102004037247B4 (de) 2004-07-31 2006-04-27 Eisenmann Lacktechnik Gmbh & Co. Kg Versorgungseinheit für eine Applikationseinrichtung und Verfahren zum Betreiben einer solchen
US20060175063A1 (en) * 2004-12-20 2006-08-10 Balkanyi Szabolcs R Method and apparatus for a cold flow subsea hydrocarbon production system

Also Published As

Publication number Publication date
DE102014016717A1 (de) 2016-05-19
EP3020485B1 (fr) 2020-12-02

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