EP0823293A2 - Rohrleitungsmolch - Google Patents
Rohrleitungsmolch Download PDFInfo
- Publication number
- EP0823293A2 EP0823293A2 EP97113189A EP97113189A EP0823293A2 EP 0823293 A2 EP0823293 A2 EP 0823293A2 EP 97113189 A EP97113189 A EP 97113189A EP 97113189 A EP97113189 A EP 97113189A EP 0823293 A2 EP0823293 A2 EP 0823293A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- pig
- pipeline
- pipeline pig
- pig body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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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
- B08B9/0554—Diablo shaped pigs
Definitions
- the invention relates to a pipeline pig with a front and a Pig body with rear face, with at least one sealing surface on the circumference of the pig body between the front and rear front, and with at least one the channel connecting the front and back of the pig body.
- Such a pipeline pig is known from the free state of the art, with the powder or granules are transported through pipelines.
- the known Newt is also used to remove deposits from inside pipe walls or used to flush blocked pipes.
- a gaseous or liquid propellant e.g. B. air, nitrogen or water
- the pressure exerted by the propellant on the rear of the pig body drives the newt through the pipe.
- Leave powder in front of the pig thus easily push through the tube.
- wall deposits are removed, which are captured by the peripheral edges of the newt will.
- Channels arranged in the pig body, the front of which is connected to the Connecting the back front increases its effect: propellant flowing through the channels from the rear to the front of the newt occurs at high speed from the channel mouths on the front.
- the one to be transported Powder is whirled up and can be pushed more easily by the newt will. In this way, the powder solidifies through the shear effect of the Pigs not and the pig is prevented from getting stuck. If wall deposits to be eliminated, these burst through the channel mouths escaping propellant more easily.
- the channels of the known newt increase its effectiveness, but it is Laborious handling of the pig. After driving through the desired one The pig must go forward to the next pipe opening driven and can only be removed from the pipe and, if desired, be used again at the starting point. This process is not only time-consuming, but also requires increased attention from the user, since when you try again Inserting the newt at the starting point, care must be taken like the newt is to be inserted into the pipe. A pig body that has no channels can on the other hand remain in the tube and with a second one, on the front of the Pigs of propellant acting in the pipe are driven back.
- a pipeline pig which has two spaced apart has cylindrical sealing surfaces with the same diameter, between which the pig body is constricted radially. On the one facing away from the constriction A spherical section is arranged on each side of the sealing surfaces, and the distance Adjacent sealing surfaces are equal to or less than the pipe inside diameter.
- the Both sealing surfaces of this pipeline pig are designed so that they on have full contact with the inner pipe wall.
- the object underlying the invention is a pipeline pig of the type mentioned in such a way that the pig in simpler Driven back in the pipe to the starting point and removed at the starting point can be.
- the advantages of the invention are in particular that the pig for the Return transport can remain in the pipe.
- a first propellant passes through the Channels and through the open valves to the front of the pig body and supported the pigging process in the manner described above.
- the desired end point in the pipe is on the front of the pig body acting second propellant used.
- the valves now block the channel and prevent the flow of the second propellant, which therefore passes through the pig drives the pipe back to the starting point.
- the front and back of the pig body are convex.
- the risk of the pig jamming and getting stuck Driving backwards is kept small.
- the pig body - As described above - two spaced cylindrical sealing surfaces are the same Has diameter between the front and rear front.
- the Distance between the adjacent sealing surfaces is equal to or less than the inner diameter the pipeline.
- the pipeline pig in a particularly advantageous embodiment of the pipeline pig according to the invention several channels are arranged in the pig body. This ensures that the first propellant emerging from the channel mouths is the one to be transported or particles to be removed in front of the pig body as far as possible detected.
- the arrangement of the channels can vary depending on the application: When transporting powders or granules, it is advisable that the The first propellant emerging from the channel mouths covers the entire direction of movement covering the vertical surface of the newt. If, on the other hand, deposits on the inner walls of the pipe, the channel openings are preferred aimed at these deposits.
- the arrangement of the front and back of the pig body connecting Channels can be of different types.
- a preferred embodiment provides that a Section of a channel from a front surface to the waist and another from the Waist runs to the other front surface. The first propellant gets into it Fall through the former channel section to the waist and the inner tube wall enclosed space and from there on through the latter Channel section to the other front surface.
- the channel sections connecting the front surfaces and the waist can be of various types be trained.
- a channel section can, for example, from a bore be formed, which connects a front surface with the waist.
- Channels can also run through the pig body in their entire length run. In this case, a single hole is used to form a channel sufficient. Of course, it is possible to use both continuous and off several different types of channel sections existing side by side to be arranged in a single pig body.
- the execution of the valves for passage of the first propellant through the Pig bodies can be realized in different ways.
- a particularly preferred one Execution provides that a membrane on the surface of the pig body is arranged, a channel mouth covered and the associated channel in the flow direction releases the first propellant and seals in the opposite direction. The membrane is replaced by the first propellant, which passes through the channels flows, raised. When the pig is transported back, the second propellant presses the membrane against the channel mouth and the channel is blocked.
- the pig body has channel sections that run from the back to the waist, it is advantageous if a single annular membrane around the waist of the Pig body runs and rests on the mouths of these channel sections.
- the membrane must not have those channel sections cover that from the newt waist to the front of the newt body run.
- the annular membrane has the advantage that it is largely in front of the particles to be conveyed or removed are protected. The danger that Place particles between the membrane and the waist surface and thereby the The valve effect is therefore small.
- one covers a surface section of the The membrane lying on the front and the channels opening there. The membrane is then sufficient through the first propellant flowing through the channels raised while the second propellant flowing from the other pipe end flows in, the membrane presses against the channel mouths and blocks the channels.
- An embodiment of the pipeline pig is preferred in which individual valves are used as any check valves are formed. These can be in the channel as well also be arranged at a mouth of the channel. Coming as check valves e.g. B. ball valves into consideration.
- the pipeline pig shown in FIGS. 1 and 2 is in a pipe R. It has a pig body 1 with a front front 2 and a rear front 4, which are each convex. Between the front 2 and the rear 4 there are two spaced cylindrical sealing surfaces 8 with the same diameter. The sealing surfaces 8 are always under prestress on the inner tube wall I, which ensures an effective seal. The distance of the adjacent sealing surfaces 8 is equal to or smaller than the inside diameter of the Tube R selected.
- the pig body 1 has a between the sealing surfaces 8 radially constricted waist 6. Due to the chosen distance of the sealing surfaces 8 and the waist 6, a passage through very narrow pipe bends is possible.
- the pig body 1 of FIG. 1 has a plurality of channels 21, which extend over their entire length Run length through the pig body 1.
- the channels 21 run parallel to the inner tube wall I.
- the channels 21 each have two channel openings: the one channel openings 23 are on the rear front 4, the other channel openings 25 arranged on the front front 2.
- Check valves 30 are arranged at the channel openings 25.
- a transport medium M that is in front the front 2 of the pig body 1 is located, with the help of the pig body 1 in Direction of the arrow.
- a first propellant T1 is used pressure on the rear front 4 of the pig body 1 and drives it forward.
- the first propellant T1 enters the channel openings 23 in FIG Ducts 21. Because of the small duct cross-section compared to the inner pipe cross-section these parts of the first drive medium T1 occur at high speed at the channel mouths 25 at the front 2.
- the transport medium M is thereby loosened, and a clumping of the transport medium M and as a result, a reduced transport performance to the point of getting stuck Pipeline pigs are prevented.
- FIG. 3 and 4 represent another embodiment of the pipeline pig different types of channel sections 20, 26, 28 connected in series a pipe R.
- From the rear front 4 of the pig body 1 run channel sections 20 through the pig body 1 to the waist 6.
- the subsequent channel section 26 is formed by the space between the waist 6 and the inner tube wall I.
- the following channel section runs from the waist 6 to the front 2 and is formed by notches 28 in the sealing surface 8.
- On the waist 6 of the pig body 1 lies an annular, endless membrane 30 ', which the channel mouths 24 of the channel sections 20 covered.
- First driving medium T1 arrives from the Rear front 4 of the pig body 1 through the channel mouths 22 into the channel sections 20, the membrane 30 'resting on the channel mouths 24 is from Driving medium T1 raised.
- the driving medium T1 can then over the channel section 26 through the notches 28 to the front 2 to reach the adjacent Pipe section to loosen up a transport medium or wall deposits to remove.
- the newt in pipe R gets to the Front motive 2 acting second drive medium T2 partly through the notches 28 in the channel section enclosed by the waist 6 and the inner tube wall I. 26.
- the pressure of the driving medium T2 presses the membrane 30 'against the channel mouths 24 of the channel sections 20 and thus prevents the second propellant T2 passes through the channel sections 20.
- the membrane 30 ' acts as a valve which opens the channels 21' in one direction and in the Opposite direction blocks.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
- Pipe Accessories (AREA)
- Joints Allowing Movement (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Pipeline Systems (AREA)
Abstract
Description
- Fig. 1
- eine Seitenansicht eines erfindungsgemäßen Rohrleitungsmolches in einem Rohr, dargestellt bei der Förderung eines Transportmediums;
- Fig. 2
- den Rohrleitungsmolch der Fig. 1 in derselben Sicht, dargestellt bei der Rückführung im Rohr;
- Fig. 3
- eine Seitenansicht einer alternativen Ausführungsform des erfindungsgemäßen Rohrleitungsmolches, teilweise im Schnitt;
- Fig. 4
- eine Vorderansicht des Rohrleitungsmolches der Fig. 3.
Claims (15)
- Rohrleitungsmolchmit einem eine Vorderfront (2) und eine Rückfront (4) aufweisenden Molchkörper (1),mit mindestens einer Dichtfläche (8) am Umfang des Molchkörpers (1) zwischen der Vorderfront (2) und der Rückfront (4),mit mindestens einem die Vorderfront (2) und Rückfront (4) des Molchkörpers (1) verbindenden Kanal (21; 21'),
gekennzeichnet durch mindestens ein Ventil (30; 30'), das den Kanal (21; 21') in einer Richtung freigibt und in der Gegenrichtung sperrt. - Rohrleitungsmolch nach Anspruch 1,
dadurch gekennzeichnet, daß ein oder mehrere Kanäle (21; 21') im Molchkörper (1) vorgesehen sind. - Rohrleitungsmolch nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Vorderfront (2) und Rückfront (4) des Molchkörpers (1) konvex geformt sind. - Rohrleitungsmolch nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß der Molchkörper (1) zwei beabstandete zylindrische Dichtflächen (8) gleichen Durchmessers zwischen der Vorderfront (2) und Rückfront (4) aufweist. - Rohrleitungsmolch nach Anspruch 4,
dadurch gekennzeichnet, daß der Abstand der benachbarten Dichtflächen (8) gleich oder kleiner ist als der Innendurchmesser des Rohres. - Rohrleitungsmolch nach Anspruch 4 oder 5,
dadurch gekennzeichnet, daß zwischen den Dichtflächen (8) eine den Molchkörper (1) radial einschnürende Taille (6) vorgesehen ist. - Rohrleitungsmolch nach Anspruch 6,
dadurch gekennzeichnet, daß mindestens ein Kanalabschnitt (20) von einer Frontfläche (4) zur Taille (6) und mindestens ein weiterer Kanalabschnitt (28) von der Taille (6) zur anderen Frontfläche (2) verläuft. - Rohrleitungsmolch nach Anspruch 7,
dadurch gekennzeichnet, daß mindestens ein Kanalabschnitt (20) von einer Frontfläche (4)durch den Molchkörper (1) hindurch zur Taille (6) verläuft. - Rohrleitungsmolch nach Anspruch 7 oder 8,
dadurch gekennzeichnet, daß mindestens ein Kanalabschnitt (28) durch eine Dichtfläche (8) am Umfangsrand verläuft. - Rohrleitungsmolch nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß ein Kanal (21) über seine gesamte Länge durch den Molchkörper (1) hindurch verläuft. - Rohrleitungsmolch nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß einzelne Ventile eine Membran (30') enthalten, die auf der Oberfläche des Molchkörpers (1) angeordnet ist und den zugehörigen Kanal (21; 21') oder Kanalabschnitt (20) in einer Strömungsrichtung des Treibmediums freigibt und in der Gegenrichtung sperrt. - Rohrleitungsmolch nach Anspruch 11,
dadurch gekennzeichnet, daß die Membran (30') ringförmig ausgebildet ist und um die Taille (6) des Molchkörpers (1) verläuft. - Rohrleitungsmolch nach Anspruch 11,
dadurch gekennzeichnet, daß eine auf einem Flächenabschnitt der Vorderfront (2) aufliegende Membran die Mündung (25) des Kanals (21; 21') bedeckt. - Rohrleitungsmolch nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß einzelne Ventile eine Klappe aufweisen, die in einem Kanal (21; 21') bzw. an einer Mündung (23, 25; 22, 24) eines Kanals (21; 21') angeordnet ist. - Rohrleitungsmolch nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß einzelne Ventile als Rückschlagventile (30) ausgebildet sind, die in einem Kanal (21; 21') bzw. an einer Mündung (23, 25; 22, 24) eines Kanals (21; 21') oder Kanalabschnitts (20) angeordnet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29613522U DE29613522U1 (de) | 1996-08-05 | 1996-08-05 | Rohrleitungsmolch |
DE29613522U | 1996-08-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0823293A2 true EP0823293A2 (de) | 1998-02-11 |
EP0823293A3 EP0823293A3 (de) | 1998-12-23 |
Family
ID=8027421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97113189A Withdrawn EP0823293A3 (de) | 1996-08-05 | 1997-07-31 | Rohrleitungsmolch |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0823293A3 (de) |
DE (1) | DE29613522U1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1306141A2 (de) | 2001-10-23 | 2003-05-02 | MOTAN Materials Handling GmbH | Verfahren und Vorrichtung zur Reinigung von pneumatischen Förderleitungen mit einem Bypass-Molch |
CN112246790A (zh) * | 2020-09-28 | 2021-01-22 | 湖南常德牌水表制造有限公司 | 一种用于超声波水表的除垢装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202006000969U1 (de) * | 2006-01-20 | 2007-05-24 | Rosen Swiss Ag | Reinigungsmolch |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2617134A (en) * | 1948-11-18 | 1952-11-11 | Phillips Petroleum Co | Locatable pipe line scraper |
US3056156A (en) * | 1960-08-03 | 1962-10-02 | Immel Ralph Conrad | Pipe line plugs |
US3659305A (en) * | 1970-04-06 | 1972-05-02 | Marvin D Powers | Flexible pipeline pigs |
US3667544A (en) * | 1970-09-09 | 1972-06-06 | Shell Oil Co | Dumbell scraper |
DE2357754A1 (de) * | 1972-11-24 | 1974-05-30 | Knapp Jun | Vorrichtung zum reinigen eines rohres |
DE3032532A1 (de) * | 1980-08-29 | 1982-03-18 | Hubert 2000 Hamburg Skibowski | Rohrleitungsmolch |
GB2182113A (en) * | 1985-10-24 | 1987-05-07 | Stc Plc | Valved pig |
US4838079A (en) * | 1987-05-20 | 1989-06-13 | Harris Richard K | Multi-channel pipe for monitoring groundwater |
-
1996
- 1996-08-05 DE DE29613522U patent/DE29613522U1/de not_active Expired - Lifetime
-
1997
- 1997-07-31 EP EP97113189A patent/EP0823293A3/de not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2617134A (en) * | 1948-11-18 | 1952-11-11 | Phillips Petroleum Co | Locatable pipe line scraper |
US3056156A (en) * | 1960-08-03 | 1962-10-02 | Immel Ralph Conrad | Pipe line plugs |
US3659305A (en) * | 1970-04-06 | 1972-05-02 | Marvin D Powers | Flexible pipeline pigs |
US3667544A (en) * | 1970-09-09 | 1972-06-06 | Shell Oil Co | Dumbell scraper |
DE2357754A1 (de) * | 1972-11-24 | 1974-05-30 | Knapp Jun | Vorrichtung zum reinigen eines rohres |
DE3032532A1 (de) * | 1980-08-29 | 1982-03-18 | Hubert 2000 Hamburg Skibowski | Rohrleitungsmolch |
GB2182113A (en) * | 1985-10-24 | 1987-05-07 | Stc Plc | Valved pig |
US4838079A (en) * | 1987-05-20 | 1989-06-13 | Harris Richard K | Multi-channel pipe for monitoring groundwater |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1306141A2 (de) | 2001-10-23 | 2003-05-02 | MOTAN Materials Handling GmbH | Verfahren und Vorrichtung zur Reinigung von pneumatischen Förderleitungen mit einem Bypass-Molch |
EP1306141A3 (de) * | 2001-10-23 | 2005-09-21 | MOTAN Materials Handling GmbH | Verfahren und Vorrichtung zur Reinigung von pneumatischen Förderleitungen mit einem Bypass-Molch |
CN112246790A (zh) * | 2020-09-28 | 2021-01-22 | 湖南常德牌水表制造有限公司 | 一种用于超声波水表的除垢装置 |
CN112246790B (zh) * | 2020-09-28 | 2023-07-28 | 湖南常德牌水表制造有限公司 | 一种用于超声波水表的除垢装置 |
Also Published As
Publication number | Publication date |
---|---|
DE29613522U1 (de) | 1997-12-04 |
EP0823293A3 (de) | 1998-12-23 |
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