DE1998081U - ELBOW FOR PNEUMATIC CONVEYOR LINES. - Google Patents

Description

'' On elbow for pneumatic conveying systems

The invention relates to a pipe elbow for pneumatic Plunder systems, in whose heavily abrasive bulk material j for example grain or poured rice sand is promoted.

is is a known phenomenon, as ^one "'the elbows are very heavily used on the inside of the outer curvature and slimy by impact and friction very quickly. To eliminate this disadvantage, the various Dos m-maybe are schore Service.

It is known, for example, to replace the curved outer wall with a curved conveyor belt that runs at the speed of the bulk material being conveyed, thereby eliminating the undesirable effects of friction. Another suggestion is to reduce the harmful friction between the material being conveyed and the pipe wall avoid, dg !? In the curve, several air nozzles for additional compressed air rrv.r.den, with which the conveyed material is to be deflected without touching it. Both ^{door hits, however,} involve the specialist part of considerable additional effort.

In a further known embodiment of a "pipe bend" the conveyed material is initially strongly delayed by flowing into an expansion and then laterally grasped and demanded by the branched and accelerated air flow conveyed collides against the transverse to Zuförderrici'turg wall, is a very _umfaj: p; rich Verzöre ^ un ^ sgehäuse necessary for no Plata is present in most cases.

"The invention is intended to achieve the object described To eliminate disadvantages of the well-known pipe elbows, im individual so the wear of the manifold outer wall without additional

borrowed aids to prevent or at least so strongly reduce the fact that replacement only takes place at very long intervals is required. The solution to this problem is based on a pipe elbow with essentially after

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16.3.68 Pat / Su / Wed (E. "1393)

outside extending cross-sectional expansion, but only causes an insignificant delay in the delivery rate, g; emaß of the invention is that the opposite of the ZuIaufstutzen Wall is arranged transversely to the feed direction and designed as an elastic baffle, below which in the discharge direction the end of the drainage nozzle begins. The conveyed material flowing into the widened cross-section therefore bounces with little delay against the elastic surface, without rubbing against it, falls back and is caught across by the deflected conveying air flow and expedited expedited. Since the baffle is elastic, it bears they contribute to noise reduction. It can consist of synthetic rubber and can be attached easily replaceable. "

If the conveying air is heavily loaded, the situation will arise in which part of the rebounding material is not conveyed away, but rather from the following particles back to the radial surface is bumped. As a result, a more or less thick layer of almost motionless bulk material particles forms in front of the impact surface, which absorbs the impact energy of the incoming material flow and sciiont the impact surface.

The baffle surface can promote this advantageous effect according to a design idea towards the jirfindung the drainage port be offset to the outside, so that a sack-shaped appendix is formed, which is filled by the padding will.

The production of the new pipe elbow is very easy and cheap Its cross-section is rectangular in the extended area, so that every form of the inner- and -a-outer walls is easy to manufacture. The inlet and outlet nozzles are then called "transition pieces from a round to a rectangular cross-section educated.

It is also possible to apply the idea of the invention to double crooked items in the event that the conveyed material air flow is to be transferred from a horizontal sifting into another horizontal but deeper conveying pipe that is parallel or lower . any angle to the feed pipe runs. The Xrümmergehäu— se is provided below the approximately vertical Prallilähe with an ice Sctirägflache, which leads to the drainage connection.

16.5.68 Pat / Bu / Wed <93)

In Figures 1 to 6 of the drawing, several embodiments of the invention are shown in longitudinal section.

Fiscur 1 shows a pipe elbow, its between the inlet and Drain connection 2, 3 lying section 1 at right angles to one another standing outer walls' + and an inner wall curved in the shape of an arc of a circle 5 contains. J- * er quei · zur // uföraeririehimg 6 lying © part the outer wall 4 is cut out and covered by a rubber plate 7 closed, which is supported from the outside by a:> corner plate 8.

The design according to FIG. 2 differs from this pipe elbow in three ways. And that is in the feed direction 6 extending outer wall 14 inclined outward, while the baffle plate 7 is offset outward. The inner wall 15 runs here for example (reradlini ^ instead of curved. The extension of the manifold housing to the outside has the purpose of promoting the formation of a good cushion in front of the baffle plate 7, provided that the fjord "air flow" is sufficiently laden with material.

In the pipe bend according to FIG. 3, the Guismi plate 7 is insignificant inclined to the iuförderrichtung 6; so that the surück-H bouncing material is already moving in the direction of the outlet nozzle 3,

which facilitates its further transport, ^ i e inner wall 25 is different strongly curved, and a flat arch is followed by a sharply curved transition; this design has fluidic advantages.

With; The help of a slightly inclined baffle plate 7 is to As FIG. 4 shows, a pipe bend is also possible; from more than To overcome 90 °, the base housing then takes roughly the shape of a Sosenrohres on "

Figures 5 ** ηα δ represent double Rohx elbows, the one

atis one ioorisontal direction in another, deeper

lying 'enable. * This begins; the drain pipe 3 under the then perpendicular; arranged baffle plate 7 and runs either in the same Sicsiiung as the inlet nozzle 2 (Figure 6) or across dastt ζΊΆξερύΡ 5). ^{Also i} % ischenanordnunuen are possible, whereby the JLola ^ fswfczen sckwesMiar can be attached to the housing 11 for the vieiseita.gen "possibility of use of the double elbow.

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I998081

Claims (3)

(EM 1393) Protection claims 1. Ponr elbow for pneumatic conveying systems with one in the
Curvature widening essentially towards the outside extending cross-section, characterized in that the wall opposite the inlet connection (2) is arranged in relation to the feed direction (6) and is designed as an elastic baffle (7), under whose end located in the discharge direction the .ab flow connection (3) begins. 2. Pipe elbow according to claim 1, characterized in that the elastic i ^ rallflache (7) consists of rubber. 3.! Pipe bend according to claim 1, characterized in that the outer walls adjoining the elastic baffle surface (7) (4-) opposite the inlet or outlet connection
(2,3 ) are offset to the outside or ß-er. Inclined * 4-. Elbow for - "- nspruch 1 _r characterized in that the resilient impact surface C is added 7) with respect to the drain port (3) to the outside.. 5. Pipe elbow according to claim 1, characterized in that the elastic .trallflache (/) de art aacix inr.en is inclined so that the rebounding conveyed material has a movement component in the conveying direction. b. Pipe elbow according to <tin /> ruch 1, characterized in that a double elbow to the IL ilen'-uns · from a horizontal direction into another, lower-lying horizontal view in addition to the inlet and outlet pipe (2, * ■) an overriding housing (11)
contains larger cross-section, whose wall opposite the inlet connection (2) is formed by the elastic baffle surface (7), below the lower end of which the drain connection
(3) begins. '0133al