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WO1997019286A2 - Raccord coude pour conduites de liquides ou de gaz eventuellement charges de solides - Google Patents

Raccord coude pour conduites de liquides ou de gaz eventuellement charges de solides Download PDF

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Publication number
WO1997019286A2
WO1997019286A2 PCT/DE1996/002166 DE9602166W WO9719286A2 WO 1997019286 A2 WO1997019286 A2 WO 1997019286A2 DE 9602166 W DE9602166 W DE 9602166W WO 9719286 A2 WO9719286 A2 WO 9719286A2
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
elbow
wear
segment
spacer
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.)
Ceased
Application number
PCT/DE1996/002166
Other languages
German (de)
English (en)
Other versions
WO1997019286A3 (fr
Inventor
Mehmet Yavuz Dedegil
Manfred Weber
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
Priority claimed from DE1995143256 external-priority patent/DE19543256C2/de
Priority claimed from DE1996112887 external-priority patent/DE19612887A1/de
Application filed by Individual filed Critical Individual
Priority to AU17656/97A priority Critical patent/AU1765697A/en
Priority to EP96945723A priority patent/EP0862711A2/fr
Publication of WO1997019286A2 publication Critical patent/WO1997019286A2/fr
Publication of WO1997019286A3 publication Critical patent/WO1997019286A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/02—Branch units, e.g. made in one piece, welded, riveted
    • 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

Definitions

  • Pipe elbow for conveyor lines for the conveyance of liquids or gases which may be contaminated with solids
  • the invention relates to a pipe bend for pipes for the pneumatic transport of bulk goods, and generally for the passage of gases and any solids-laden liquids.
  • the elbows wear considerably faster than the straight pipe sections because the solid particles have a higher inertia due to their higher density and cannot follow the gas or the liquid quickly enough when changing direction. They hit the manifold wall on the outside of the pipe bend and cause greater material removal, i.e. Wear.
  • the local wear rate depends, among other things, on the impact angle, the speed and the number of particles that strike a surface element of the inner wall per unit of time.
  • the filler neck should fill with the pumped solid and thus protect against wear.
  • the disadvantage of this type of deflection is, on the one hand, the significantly higher pressure loss and, on the other hand, that it cannot be installed in all positions, as is the case, for example, with deflections from one direction vertically upwards to a horizontal direction.
  • the filling in the blind socket can come loose and fall back into the line, which represents a risk of clogging.
  • the Vortice-Ell manifold [2] represents a further development of this form of deflection. Instead of the T-piece with blind spigot, the blind spigot is closed with a spatially rounded rear wall and the flow is deflected starting at a favorable angle.
  • the rotational flow generated in the dead space is intended to prevent solid particles from hitting the opposite wall, but this is not always possible; in addition, it can be observed that the vortex in this space also provides additional wear.
  • the shape of these elbows is quite complex, their mass is large and they can practically only be produced as castings.
  • the object of the present invention is to provide a pipe bend of the type mentioned at the outset which is distinguished on the one hand by extremely low wear and tear and which is geometrically simple and has no dead space, is economical and easy to produce in terms of material expenditure and moreover no longer Space takes up than a conventional circular elbow.
  • a special training consists in the fact that the wear protection measures defined in the subclaims can also be used in connection with curved pipe elbows in the manner according to the invention.
  • Figure 1 shows a first and a second embodiment of a pipe bend.
  • Figure 2 shows a third and a fourth embodiment of a pipe bend.
  • FIGS. 1 and 2 shows a representation relating to the manufacture of the pipe bend according to FIGS. 1 and 2 with regard to the required pipe cuts;
  • Fig. 4 shows a fifth and a sixth
  • FIG. 5 shows a seventh and an eighth exemplary embodiment of a pipe bend
  • FIG. 6 shows a ninth and a tenth exemplary embodiment of a pipe bend, as well as various exemplary embodiments for the wear protection measures;
  • 9 shows an eleventh embodiment of a pipe elbow; 10 shows a curved pipe bend with various exemplary embodiments of the wear protection inserts.
  • the elbow according to the present invention ensures that a constant angle w is always guaranteed between the direction of approach and the impact surface, in contrast to the known circular elbow, (FIG. 1A).
  • the wear is thus largely evenly distributed over the middle manifold segment 2. This fact alone prolongs the service life of the pipe bend, because a "worst point" at which a hole generally arises no longer exists. The wear load of this point is now distributed over a much larger area.
  • the present invention differs from the manifolds consisting of segments, as described for example in DE 39 01 618 AI, and from the manifold with segment inserts made of wear-resistant material according to DE 35 30 987 C1. In the last two publications, a large number of segment elements were used to simulate an elbow, with the disadvantage of changing the angle of impact.
  • the pipe elbows can also be produced by bending (Fig. 4A, B).
  • the pipe elbows can also be made, depending on the material, by casting, drawing or bending (Fig. 4A, B).
  • the prefabricated elbows can be manufactured at one or both ends with suitable connecting elements such as flanges, threads, welding sockets, etc. (FIGS. 5A, B).
  • the pipe elbow consisting of straight sections offers the possibility of using additional elements to reduce wear on the elbow wall.
  • a round rod - see reference numeral 6 - on the outer surface line of the middle elbow segment (FIG. 6C, top) results in an extension of the tool life by approx. 60%.
  • This rod 6 can also have a rectangular cross section (FIG. 6C, middle) or an oval deformed round rod (FIG. 6C, below). As long as the cross section of such a rod 6 is not more than 20% of the inner tube cross section, no or no appreciable increase in the pressure loss is found.
  • the rods 6 can also have a certain distance from one another, so that a small amount of the fine partly fix and can also act as wear protection; the mass of the insert rods is reduced.
  • Other inserts 8 made of more wear-resistant material can also be accommodated in the spaces between these (spaced-apart) rods 7, which take over the actual wear protection, the elements firmly connected to the elbow 7 perform the function of a holder.
  • the holding rods 7 and the inserts 8 can be provided with matching profiles.
  • the inserts can also protrude above the holding rods 7 (FIG. 6G).
  • the inserts 8 are to be exchanged at certain time intervals, so that only these inserts are lost and the manifold itself is reused.
  • a wear protection insert consists of three Main parts, namely a retaining disk 11 or a retaining ring 12, a spacer 13 and a wear comb 14 or a wear shell 15.
  • the holding disc 11 (FIG. 7) is primarily suitable for installation between two flanges (FIG. 7D). Seals 19 must be provided on both sides of the disk.
  • the retaining washer itself can also carry a seal, for example an O-ring in a groove or a glued-on flat seal.
  • the washer 11 can be centered on the inner wall by the flange screws from the outside or with centering tongues 18.
  • the centering tongues 18 are small leaflets which little obstruct the flow, but can fall off over time due to wear. If this is absolutely undesirable, the centering must take place from the outside, on the screws or by means of centering tongues pulled outwards, on the outer flange edge.
  • the holding disc carries the spacer 13 on its inner edge, for which purpose an inwardly projecting tongue can also be provided.
  • the retaining ring 12 (FIG. 8), on the other hand, is primarily intended for installation in bends that are installed using screw connections or sleeves.
  • the thin ring which extends to about half of the inner circumference, has the task of securing the direction.
  • the spacer 13 is attached to it.
  • the retaining ring 12 and the spacer 13 are attached to the manifold by, for example, one or more screw (s), pin (s), etc.
  • Retaining washer 11 is dispensed with and the spacer is fastened directly to the intake manifold segment 1 by screws, pins, spot welding or in another suitable manner.
  • the spacer 13 which carries the actual wear protection elements, comb or shell, at the lower end, should protrude slightly beyond the holding disc or the holding ring against the flow direction in order to deflect the incoming particles as deflectors and thus protect the fastening point against wear.
  • the fastening between the retaining disk or the retaining ring and the spacer should be designed such that the spacer, which is somewhat oversized in length, can be displaced in the longitudinal direction. This measure allows a wear insert in the form of a modular system to be adapted to various segment elbows.
  • the connection between the spacer and the wear comb or ring should be such that the angle O between these elements can be adjusted. This can also be achieved by bending the spacer. This multiple variability enables the wear inserts to be assembled as a modular system from prefabricated sub-elements as required.
  • the wear comb 14 (FIG. 7) consists of wear bars (see FIGS. 6C, D, G) which are connected by a spacer to a common support.
  • the wear comb or wear protection as a shell or a circular segment (FIG. 6E) can also be connected directly to the elbow, ie without a spacer.
  • a cast segment elbow with a reinforced outer elbow wall may be sufficient (Fig. 9).
  • the wear inserts described above, in particular with a wear comb composed of rods or as a single rod with a circular segment cross section (cf. FIG. 6E) can also be used in conjunction with conventional elbow segments (FIG. 10).
  • the rods serving to protect against wear need only be bent according to the radius of curvature.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

Dans ce raccord coudé pour conduites de liquides ou de gaz éventuellement chargés de solides, la génératrice extérieure de la paroi intérieure d'un segment central de préférence droit (2) croise la génératrice extérieure de la paroi intérieure d'un segment d'écoulement (3) du raccord coudé à un point (S) situé du côté extérieur du raccord coudé et qui forme l'intersection entre le prolongement imaginaire de la génératrice intérieure de la paroi intérieure d'un segment d'admission (1) du raccord coudé et la génératrice extérieure de la paroi intérieure du segment d'écoulement (3) du raccord coudé.
PCT/DE1996/002166 1995-11-20 1996-11-14 Raccord coude pour conduites de liquides ou de gaz eventuellement charges de solides Ceased WO1997019286A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU17656/97A AU1765697A (en) 1995-11-20 1996-11-14 Pipe bend for feed pipes for feeding liquids or gases which may possibly be laden with solids
EP96945723A EP0862711A2 (fr) 1995-11-20 1996-11-14 Raccord coude pour conduites de liquides ou de gaz eventuellement charges de solides

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19543256.8 1995-11-20
DE1995143256 DE19543256C2 (de) 1995-11-20 1995-11-20 Rohrkrümmer für Rohrleitungen zur Förderung von gegebenenfalls feststoffbefrachteten Flüssigkeiten oder Gasen
DE1996112887 DE19612887A1 (de) 1996-03-30 1996-03-30 Rohrkrümmer für Förderleitungen zur Förderung von gegebenenfalls feststoffbefrachteten Flüssigkeiten oder Gasen
DE19612887.0 1996-03-30

Publications (2)

Publication Number Publication Date
WO1997019286A2 true WO1997019286A2 (fr) 1997-05-29
WO1997019286A3 WO1997019286A3 (fr) 1997-07-10

Family

ID=26020516

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/002166 Ceased WO1997019286A2 (fr) 1995-11-20 1996-11-14 Raccord coude pour conduites de liquides ou de gaz eventuellement charges de solides

Country Status (3)

Country Link
EP (1) EP0862711A2 (fr)
AU (1) AU1765697A (fr)
WO (1) WO1997019286A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2783301A1 (fr) * 1998-09-10 2000-03-17 Mdc Raccord etanche a geometrie variable
WO2000017562A1 (fr) * 1998-09-21 2000-03-30 Dong Lim Industrial Co., Ltd. Accessoires de canalisation anti-abrasion pour flux rapide charge de particules
GB2425971B (en) * 2005-05-11 2010-06-30 Gaim Ltd A Flow Distributor
WO2016046174A1 (fr) * 2014-09-26 2016-03-31 Ksb Aktiengesellschaft Composant de guidage de l'écoulement
CN111794303A (zh) * 2020-07-20 2020-10-20 中铁大桥局集团有限公司 一种弯头吸泥机构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1012822A (fr) * 1950-02-14 1952-07-17 Saarlandische Steinindustrie O Coude pour conduites destinées au transport pneumatique, en particulier de morceauxde pierre, matières de remblayage et analogues
FR1119149A (fr) * 1955-02-14 1956-06-15 Oskar Biegel G M B H Coude pour conduites hydrauliques et pneumatiques plus particulièrement pour conduites d'entraînement des déblais par insufflation ou par rinçage utilisées dans les mines
FR1135039A (fr) * 1955-10-22 1957-04-23 éléments de conduites pour transport de matériaux abrasifs ou de matières abrasives
DE1550003A1 (de) * 1967-01-03 1969-05-14 Krantz H Fa Rohrkruemmer mit vorzugsweise nur einem Zwischenstueck

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2783301A1 (fr) * 1998-09-10 2000-03-17 Mdc Raccord etanche a geometrie variable
WO2000016000A1 (fr) * 1998-09-10 2000-03-23 M.D.C. Sarl Raccord etanche a geometrie variable
US6561549B1 (en) 1998-09-10 2003-05-13 Mdc Sarl Sealing connector with variable geometry
WO2000017562A1 (fr) * 1998-09-21 2000-03-30 Dong Lim Industrial Co., Ltd. Accessoires de canalisation anti-abrasion pour flux rapide charge de particules
US6422608B1 (en) 1998-09-21 2002-07-23 Dong Lim Industrial Co., Ltd. Anti-abrasion pipe fittings for high-speed particle-laden flow
GB2425971B (en) * 2005-05-11 2010-06-30 Gaim Ltd A Flow Distributor
WO2016046174A1 (fr) * 2014-09-26 2016-03-31 Ksb Aktiengesellschaft Composant de guidage de l'écoulement
CN106687698A (zh) * 2014-09-26 2017-05-17 Ksb 股份公司 引导流的构件
CN106687698B (zh) * 2014-09-26 2018-12-25 Ksb 股份公司 引导流的构件
US10330132B2 (en) 2014-09-26 2019-06-25 Ksb Aktiengesellschaft Flow-conducting component
CN111794303A (zh) * 2020-07-20 2020-10-20 中铁大桥局集团有限公司 一种弯头吸泥机构

Also Published As

Publication number Publication date
EP0862711A2 (fr) 1998-09-09
WO1997019286A3 (fr) 1997-07-10
AU1765697A (en) 1997-06-11

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