DE7131857U - Gas cooler - Google Patents

Description

Γ PATENTAr-IWALTt ₁ - '* * ~~ Ι

• * ν b

DR.-ING. R. DÖRING DIPL.-PHYS. DR. J. FRICKE

BRAUNSCHWEIG MUNICH

| f Maschinenfabrik Beth- · GmbH, 24 Lübeck 1, Waisenalice

"Gas cooler"

The innovation relates to a gas cooler, in particular an exhaust gas cooler, to be connected upstream of filter systems, in which the Tubes of a tube bundle through which one medium flows in upper and lower perforated plates one of the other Medium transverse to the tube bundle through which the cooling housing flows are used secured against axial displacement.

Such gas coolers or cooling devices in general are Ir. known in a wide variety of designs. Here the pipes are welded into the bottom and the top of the cooler housing or are sealed in another way and firmly with connected to these floors or ceilings.

In contrast, it is the task of the present innovation to develop a gas cooler of the type described in more detail so that that he is from beso :. built in light sheet metal can be, requires few processing steps and yet

■ * _L
I.

warping of the cooler housing due to thermal stresses and expansion of the cooler tubes is avoided.

This object is achieved according renewal in that the tubes are loose and free of seals and shrunk at least one end r \ by means of a pipe or the releasably held on the pipe end fixed bearing or the insert ring in the perforated plate.

With this arrangement, the upper ends of all tubes can be held completely free laterally in a perforated plate punched out with correspondingly narrow tolerances , in which the tubes protrude through the punched holes into an inlet and an outlet hood for the one medium. With their lower end, the tubes protrude loosely into a correspondingly sized perforated plate, the stop shoulder formed by the contact or insert ring ensures that the drill is held in its axial position at least at one end , while thermal expansions occur can act freely in the axial direction without being transmitted as deformation forces via the lower and upper perforated plates to the housing of the cooler.

• st

The upper and lower perforated sheets therefore only have the The task of holding and securing the pipes according to their weight, however, do not require any additional forces to record. As a result, the whole cooler housing can be built with much weaker metal sheets, so that the whole Construction also becomes easier. Since the usual welding work There is no need for a tube bundle and perforated metal sheets, a considerable amount of work time and thus costs saved.

Any occurring through the 1Ο..9 insertion of the pipes Leaks can be tolerated with such a gas cooler. and with a corresponding surcharge in dex * Ventilafcöisvung be compensated.

The innovation is illustrated below with the aid of schematic drawings explained in more detail using an exemplary embodiment, wherein

Fig. 1 is a vertical section through an embodiment of the new gas cooler shows while

Fig. 2 shows a detail on an enlarged scale. FIG. 3 shows, on a further enlarged scale, a variant of the detail corresponding to FIG. 2.

The gas cooler 1, which is shown in Fig. 1, consists of a cooler housing 2, on one side of which two parallel

7111817-6.

ill 1. t

goscheltete fan cover:] or blow-in installation 3, 4 for the cooling medium A (generally air) are provided, which flow out on the opposite side over the entire cross section can, as indicated at A and the arrows shown on the right in the figure. On this side, the housing 1 has a connection flange 5 which, when using pressure fans for the cooling medium, accommodates a blow-out hood can or when using suction fans for the cooling medium with the suction - ^ indicated by dash-dotted lines at 6 nozzle of the fan assembly is connectable.

! The Eühlergebäuse takes in the example shown at least zv / ei in the direction of flow dec Medici- A bintöx-lying one on top of the other

• on tube bundles, which are each loaded from Robren 10 and 11

• stand. The upper end of the throughflow chamber of the JPilterge

ί the building is formed by two perforated sheets. 7.8, each with

holes punched through through which the.

• the upper ends of the tubes 10 or 11 with narrow tolerances

j break through.

Above the perforated plate 7 is a Mntrittsbaube 19 for the Inflow of the other medium to be cooled B provided, the

'a corresponding outlet structure 18 for the same medium ^! corresponds to the perforated plate 8.

In the lower area "c" is the throughflow space of the housing

a common perforated plate 9 is limited, the holes of which are also

741817 «Mt a

I »t

if "based on the diameter of the tubes 10 or 11 a have correspondingly narrow diameter, so that the tubes with As little play as possible protruding through the holes, namely in a funnel-shaped lower part 12, in which the through the Medium B flowing in pipes 10 is diverted to reflux into pipes 11 will. The lower part 12 is thus designed so that any settling pests of the mediurj to be cooled, e.g. hot raw gas, can collect at the lower end of the lower part 12 and a discharge lock 13 of a Dosiervorricbtung 14 supplied and discharged from there in the direction of arrow C. can be.

All tubes 10, 11 are loosely inserted into the associated upper and lower perforated plates 7, 8, 9. About an axial shift To prevent the pipes from being exposed to the perforated metal sheets, each pipe 10, 11 has a fuse at least at one end, which cooperates with the perforated plate.

In the example shown, each tube is shrunk-on or releasably attached to the lower end at the lower end Attachment ring 15 (Pig-2) or insert ring 15 (Pig. 3), which forms a stop shoulder with which the tube is placed on the perforated plate 9 is supported. The dimensions of the punched holes I7 iro lower perforated plate 9 compared to the diameter of the tubes 10,11 are chosen so that the tubes can be easily inserted, the

- ο -

However, the leak opening is as small as possible when the pipes are used.

In this way it is ensured that the tubes 10 and 11 can expand or contract freely when the temperature changes, cone that any forces are transmitted to the upper perforated plates 7, 3 or the lower perforated plate S. In the example shown, the lower perforated plate only has to carry the weight of the tube bundle, while the upper perforated

Sheets 7,8 only have to absorb the lateral holding forces that are necessary to secure the position of the pipes in the transverse direction. The upper and lower perforated sheets can therefore be made of relatively thin sheet metal, just as the housing walls are not stressed by deformation of the perforated sheets, so that a particularly simple, inexpensive structure is ensured here too.

To change the capacity of the system, the number of tubes or by arranging several tube bundles in a plane can be transversely to the direction of flow of the medium A next to each other or by increasing the length of the pipes v / ground, whereby the Construction principle is retained in all embodiments. The new training can also be used when the pipes are inclined.

713i857-i.it 73

Claims (2)

1 I I M * Protection claims 1. Gas cooler, in particular exhaust gas cooler, for upstream connection upstream of filter systems, in which the pipes one of the one medium flowed through tube bundle in upper and lower perforated plates one of the other medium flowed through transversely to the tube bundle Cooler housing are inserted secured against axial displacement, characterized in that that the tubes (10, 11) are loose and free of gaps as well as on little • at least one end by means of a contact or insert ring which is shrunk onto the pipe or is releasably fastened to the pipe end (15.15 ') held in the perforated plate (7.8 or 9) are. 2. Gas cooler according to claim 1, characterized in that that the lower end of each tube (10j11) with a shoulder on the lower perforated plate (9): gets up. 7111117-iftn