DE3505461A1 - Pipe bend - Google Patents
Pipe bendInfo
- Publication number
- DE3505461A1 DE3505461A1 DE19853505461 DE3505461A DE3505461A1 DE 3505461 A1 DE3505461 A1 DE 3505461A1 DE 19853505461 DE19853505461 DE 19853505461 DE 3505461 A DE3505461 A DE 3505461A DE 3505461 A1 DE3505461 A1 DE 3505461A1
- Authority
- DE
- Germany
- Prior art keywords
- coal
- mat
- pipe
- pipe bend
- coal dust
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/52—Adaptations of pipes or tubes
- B65G53/523—Wear protection
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Thermal Insulation (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
RohrkrümmerElbow
Die Erfindung betrifft einen Rohrkrümmer, insbesondere für Kohlenstaubleitungen, zum Transport eines Gemisches aus Kohlenstaub und Luft bzw. Gas zum Brenner eines Dampferzeuqers.The invention relates to a pipe bend, in particular for coal dust pipes, for transporting a mixture of coal dust and air or gas to the burner of a Steam generator.
Während das Gemisch aus Kohlenstaub und Luft bzw. Gas durch den Rohrkrümmer strömt, wird ein großer Teil des Kohlenstaubs - insbesondere schwere Partikel - nach außen gegen einen Teil der Rohrinnenseite des Rohrkrümmers geschleudert. Dieser ständige Kontakt mit dem schleißenden Kohlenstaub verursacht den \/erschleiß selbst des stärksten Werkstoffes, der dann ausgetauscht werden muß und dadurch zum Stillstand der Anlage führt.While the mixture of coal dust and air or gas through the pipe elbow flows, a large part of the coal dust - especially heavy particles - thrown outwards against part of the inside of the pipe elbow. This constant contact with the abrasive coal dust causes the wear itself the strongest material, which then has to be replaced and thus to a standstill the system leads.
Es wurde bereits versucht, das Problem dadurch zu lösen, daß der Rohrkrümmer eine Einlage aus Keramik erhält oder ganz aus Keramik hergestellt wird. Die Kosten für einen solchen Rohrkrümmer betragen jedoch ein Vielfaches der Kosten eines Metallrohrkrümmers. Zusätzlich besteht der Nachteil, daß die Keramikeinlagen oder die Keramikrohrkrümmer zerbrechen. Dieses Material wird schließlich auch verschlissen.Attempts have already been made to solve the problem in that the pipe bend an insert made of ceramic is given or made entirely of ceramic. The costs for such a pipe elbow, however, are many times the cost of a metal pipe elbow. In addition, there is the disadvantage that the ceramic inserts or the ceramic pipe bends break. This material will eventually wear out as well.
Die Aufgabe der Erfindung ist es, einen verschleißfesten Rohrkrümmer zu schaffen, bei dem die geschilderten Nachteile vermieden werden.The object of the invention is to provide a wear-resistant pipe elbow to create in which the disadvantages described are avoided.
Diese Aufgabe wird dadurch gelöst, daß ein Teil des äußeren Umfangs des Rohrkrümmers auf der Rohrinnenseite mit einer Matte aus zusammengelöteten Metallfasern abgedeckt ist.This object is achieved in that part of the outer circumference of the pipe elbow on the inside of the pipe with a mat made of metal fibers soldered together is covered.
Durch diese erfindungsgemäße Maßnahme dringen Kohlenstaubpartikel, die mit der Rohrinnenseite des Rohrkrümmers in Berührung kommen, in die Matte ein.Through this measure according to the invention, coal dust particles penetrate, that come into contact with the inside of the pipe bend into the mat.
Durch den ständigen Aufprall der Kohlenstaubpartikel mit relativ hoher Geschwindigkeit auf die Matte, wird der in ihr befindliche Kohlenstaub relativ fest zusammengedrückt. Wenn etwas aus der Kohleschicht abbröckelt, wird es rasch durch neue Kohlenstaubpartikel ersetzt. So handelt es sich bei der Oberfläche, die dem stark schleißenden Kohlenstaub ausgesetzt ist, selbst um fest zusammengepreßte Kohle,so daß für sehr lange Zeit ein sicherer Verschleißschutz besteht. Es kommt zwar zu einem gewissen Verschleiß der Fasern der Matte, wenn etwas von der Kohle abbröckelt.Due to the constant impact of the coal dust particles with a relatively high Speed on the mat, the coal dust in it becomes relatively solid pressed together. If something crumbles from the coal layer, it quickly gets through new coal dust particles replaced. So it is with the surface that the strongly abrasive coal dust is exposed, even to tightly compressed coal, so that there is reliable protection against wear for a very long time. Although it comes to some wear and tear on the fibers of the mat when some of the charcoal crumbles.
Dieser Verschleiß ist jedoch wesentlich geringer als derjenige, der an einem Rohrkrümmer aus Metall oder Keramik auftritt.However, this wear is much less than that of occurs on a metal or ceramic elbow.
Die Erfindung wird mit weiteren Einzelheiten in der Zeichnung erläutert. Es zeigen Fig. 1 eine Seitenansicht des Rohrkrümmers Fig. 2 einen Teilschnitt nach Linie 2-2 in Fig. 1 Fig. 3 einen Schnitt nach Linie 3-3 in Fig. 2 Fig. 4 einen Schnitt nach Linie 4-4 in Fig. 2 Die Kohlenstaubleitung 30, die zu einem Brenner eines Dampferzeugers (beide nicht dargestellt) führt, enthält einen Rohrkrümmer 10. Ein Teil (ca. 75 °a) des äußeren Umfangs 12 des Rohrkrümmers 10 wird auf der Rohrinnenseite mit der Matte 14 aus miteinander verlöteten Metallfasern ausgekleidet. Die Matte 14 ist an einer festen Abdeckplatte 16 durch eine Vielzahl von Gewindebolzen 18 mit Muttern 20 befestigt. Die Gewindebolzen 18 sind mit Unterlegscheiben 22 (Fig. 4) versehen und diese mit der Matte 14 verschweißt.The invention is explained with further details in the drawing. 1 shows a side view of the pipe elbow, FIG. 2 shows a partial section Line 2-2 in FIG. 1, FIG. 3 shows a section along line 3-3 in FIG. 2, FIG. 4 shows a section according to line 4-4 in Fig. 2 the pulverized coal line 30 leading to a burner of a steam generator (both not shown) contains a pipe elbow 10. One part (approx. 75 ° a) of the outer circumference 12 of the pipe elbow 10 is on the inside of the pipe with the Mat 14 lined with metal fibers soldered together. The mat 14 is on a fixed cover plate 16 by a plurality of threaded bolts 18 with nuts 20 attached. The threaded bolts 18 are provided with washers 22 (FIG. 4) and this is welded to the mat 14.
Die Muttern 20 werden entlang ihres Gesamtumfangs 24 gasdicht mit der Abdeckplatte 16 verschweißt. Die Abdeckplatte 16 ist an ihrem Umfang mit dem Rohrkrümmer 10 verschweißt (26).The nuts 20 are gas-tight along their entire circumference 24 the cover plate 16 is welded. The cover plate 16 is on its periphery with the Elbow pipe 10 welded (26).
Mittels Flanschen 28 wird der Rohrkrümmer 10 mit den Rohrleitungen 30 verbunden.By means of flanges 28, the elbow 10 is connected to the pipelines 30 connected.
Obwohl die Matte 14 aus allen beliebigen Metallfasern bestehen kann, die zu einer Matrix zusammengeschlossen sind, in der sich die Kohlenstaubpartikel fangen, wird eine Matte bevorzugt gemäß der Patentbeschreibung US-Patentanmeldung 535,130, eingereicht am 23.09.1983 mit dem Titel Pr ocess for Bonding Refractory to Surfaces" ("Verfahren zur Befestigung von feuerfestem Material an Flächen").Although the mat 14 can consist of any metal fiber, which are combined to form a matrix in which the coal dust particles catch, a mat is preferred according to the specification US patent application 535,130, filed 9/23/1983 entitled Process for Bonding Refractory to Surfaces ".
Diese Patentanmeldung beschreibt eine einzigartige Technik für das Verlöten von Metallfasern zu einer Matte, die danach leicht zu jeder gewünschten Dichte verdichtet werden kann, wie beispielsweise die der vorliegenden Erfindung.This patent application describes a unique technique for the Soldering metal fibers to form a mat, which can then be easily made to any desired Density can be densified, such as that of the present invention.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US60536484A | 1984-04-30 | 1984-04-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3505461A1 true DE3505461A1 (en) | 1985-10-31 |
DE3505461C2 DE3505461C2 (en) | 1986-10-30 |
Family
ID=24423362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3505461A Expired DE3505461C2 (en) | 1984-04-30 | 1985-02-16 | Wear-resistant elbow, especially for coal dust pipes |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS60234193A (en) |
KR (1) | KR850007857A (en) |
DE (1) | DE3505461C2 (en) |
IN (1) | IN160998B (en) |
ZA (1) | ZA851080B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5934205A (en) * | 1996-12-23 | 1999-08-10 | Combustion Engineering, Inc. | Y-shaped distributor with liner assembly for distribution of pulverized coal and air mixture |
DE10120131C1 (en) * | 2001-04-25 | 2002-09-12 | Winand Wolf | Lining element used for a conveying path for conveying broken glass pieces in the glass-processing industry comprises a container divided into cells filled with broken glass pieces |
EP1970331A1 (en) | 2007-03-16 | 2008-09-17 | Ros Roca, S.A. | Antiwear protection system using antiwear inserts |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102679078B (en) * | 2011-03-16 | 2015-09-09 | 北汽福田汽车股份有限公司 | Concrete conveyance pipe bend |
CN111421469A (en) * | 2020-04-24 | 2020-07-17 | 西安奕斯伟硅片技术有限公司 | Slurry transportation pipeline and slurry transportation system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4130300A (en) * | 1978-02-06 | 1978-12-19 | Sheridan Joseph U | Composite abrasion resistant pipe elbow |
-
1985
- 1985-02-13 IN IN107/CAL/85A patent/IN160998B/en unknown
- 1985-02-13 ZA ZA851080A patent/ZA851080B/en unknown
- 1985-02-16 DE DE3505461A patent/DE3505461C2/en not_active Expired
- 1985-02-27 KR KR1019850001238A patent/KR850007857A/en not_active Application Discontinuation
- 1985-04-22 JP JP60084671A patent/JPS60234193A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4130300A (en) * | 1978-02-06 | 1978-12-19 | Sheridan Joseph U | Composite abrasion resistant pipe elbow |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5934205A (en) * | 1996-12-23 | 1999-08-10 | Combustion Engineering, Inc. | Y-shaped distributor with liner assembly for distribution of pulverized coal and air mixture |
DE10120131C1 (en) * | 2001-04-25 | 2002-09-12 | Winand Wolf | Lining element used for a conveying path for conveying broken glass pieces in the glass-processing industry comprises a container divided into cells filled with broken glass pieces |
EP1253092A1 (en) | 2001-04-25 | 2002-10-30 | Winand Wolf | Lining element for a conveyor |
EP1970331A1 (en) | 2007-03-16 | 2008-09-17 | Ros Roca, S.A. | Antiwear protection system using antiwear inserts |
ES2329434A1 (en) * | 2007-03-16 | 2009-11-25 | Ros Roca, S.A. | Antiwear protection system using antiwear inserts |
Also Published As
Publication number | Publication date |
---|---|
IN160998B (en) | 1987-09-05 |
KR850007857A (en) | 1985-12-09 |
ZA851080B (en) | 1985-10-30 |
DE3505461C2 (en) | 1986-10-30 |
JPH0143200B2 (en) | 1989-09-19 |
JPS60234193A (en) | 1985-11-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |