DE1872888U - SELF-CLEANING SCREW HEAT EXCHANGER. - Google Patents

Description

KALLE AKTIENGESELLSCHAFT Company Our sign tag sheet

Gm 194 SP-Dr.P. ~ Us March 26, 1963

Description
for registration of

EALL

liiesbaaen-Biebrieh

for a utility model

Self-cleaning οCiineeken heat exchanger

It is known to use welding machines in welded Design for continuous cooling or heating of products, especially those of a granular, flaky or doughy texture to use these machines are built with one or more snails and are sometimes with Liantel heating bsw. Jacket cooling or with jacket heating and inner tube heating or cooling or equipped with heated or cooled hollow screw flights.

All known screw heat exchangers of welded design, which are suitable for large throughputs have the disadvantage that they cannot be used for goods that tend to stick to the snails, such as poles

KALLE AKTIENGESELLSCHAFT

company Our sign day sheet

Gm 194 SP-Dr.P.-us March 26, 1963 -2-

these gluing sicli result from the known ones 3 Exchanger heat from the heat exchanger ^ depending on its design, the one or the other of a series of grievances, for example a considerable reduction in the heat transfer, an increase the stretching and thus a reduction in their delivery rate or even a loss of delivery, a squeezing of the Grutes, a jamming of the screws against each other in machines with several oelmecken and thus an increase the required drive power or overdrying of the adhering product, which when occasionally detached causes a deterioration in the quality of the entire normal product.

The purpose of the invention is to create a spiral heat exchanger mix at least two intermeshing screws with hollow ones that can be charged with coolant or heating medium preferably formed from sucked sheet metal to create, with the also dough-like and in itself or when cooling or Lr v? arme η to stick to the cooled goods or can be heated without the liaehteile described above appearing.

According to the invention, this is achieved by that with the ochneckenv / heat exchangers at least two Screws connected to one another in the same direction are and aie hollow, charged with heating or coolant

12/09 100 50 T. 1.63 a

KALLE AKTIENGESELLSCHAFT ^Company Our sign tag sheet

GmJ 94 SP-Or.P.-us March 26, 1963 -3-

Barren Schneekengang interlock in such a way that the outer tendon ekenkama. of each tendon ο leengang it throughout Area of engagement with the abutting planks z? / eier tendon ducts of the neighboring snail touched or almost touched.

The 3-object of the invention is based on the drawings explained in more detail. Of these, Fig. 1 shows a partial view of a two-part embodiment. Figs. 2 and 3 each show a partial view of special designs shown. Figs. 4 and 5 show partial view of an arrangement of four screws in plan view and side view, respectively. Fig. 6 shows a heat exchanger in side view and Fig. 7 is a front view thereof; Fig. 8 shows part of an ochneck partially in section.

In the Schneckenwärmeaustauschern according to the invention each screw in there is a known ■ ^f else from the ^ chneekenkern 1 and the subsequent aufgesehweißten in a helical screw blades 2. Each two adjacent Sehneckeiiblätter, for example, 2 θ, and 2 To are connected together at Sehneckenkainrü 3 , preferably welded, and thereby form a spirally running cavity 1 ″ between themselves and the screw core 1, which can be charged with cooling or heating means

12/09 100 50 T. 1.63 a

KALLE AKTIENGESELLSCHAFT

company

Our sign day sheet

GmJJH ₁ SP-Jjr.P.-us March 26, 1963 -4-

and the outer lying surfaces of the ocher leaves its planks. Run more than one single tendon duct next to each other around the oeimeekenkern, then one such a snail is referred to as multi-turn. The scope of this application includes screw-type heat exchangers with catchy ones Snails as well as those with multiple-flight snails.

In the case of the tendon heat exchangers according to Invention is achieved through appropriate pro joining the hollow Coal ducts, which are influenced by the number and the shape of the ochneckenkammes is dependent, achieved that the intervening Schneckenkaruiii of a prosperous snail tunnel the blank of the adjacent screw touches or at least approximately touched in the entire overlap area. As a result of & smoothness of two neighboring snails are yours Direction of movement in all points of contact, i.e. along the entire line of contact, opposite to each other, so that the crest of a snail's worm gear rests on the abutting i'lanken of two worm gullies of the neighboring screw carries out a scratching movement and thus keeps it clean. For example, the Kazite 3 a holds the flanks on the sectar leaves 2 a and 2 d satiber. the same process is reciprocal, so that two neighboring snails comb each other out.

In the example shown schematically in Fig. 1 aer screw of such a two-flight screw

KALLE AKTIENGESELLSCHAFT

Company Our Sign Tag Sheet '

194 .- ■ - '■■ - ■ ^v .03P-iDr.P.-u & 26.3.196.3 -5-

heat exchanger is the peeling curve through the screws - '. / line. determined at the outer son corner radius. The (kite; of .mitting the Schneeken depends essentially τοη the observance a uniform screw pitch over the entire length.

. In the manufacture of such snails, it is possible, depending on the type of sheet material used, .that. Warping of the worm blades during welding is very difficult to avoid. In terms of production, in those cases where such a warping is to be expected, a simplification results from the fact that one differs from the calculable. The theoretical shape of the son corner thread flanks differs somewhat by limiting the cross-section of the free passage between the son corner thread flanks on the outer screw diameter in .. radial direction straight. This can be _beispiels-: - as realized in such a way that the most extreme. : / The edge 3 of the tendon passageway running around the corner of the corner is formed by ... _: ■ a strip 5 \ placed on the worm blades 2. '. / /. ..

. Another practical realization ;:;. / 'of this simplification consists in "that one-the two ..- _: ■. screw blades of the helical threads on the screw circumference, · a piece 6 adjacent to one another. welded. calculable theoretical shape somewhat different export, s tion en art with radially outwardly directed ^{Eandstüclien-:;} _: . Any distortions that occur can be easily compensated for by straightening these edge pieces. ■ -. - .-

12/09 100 50 T. T. 63 α

KALLE AKTIENGESELLSCHAFT

IVSSi

Company Our sign tag sheet

Gm_194. .. SP-Dr, P. -us 26 ... 3.1963 -6-

A particularly good circulation and warmth .. "

An exchange effect on the goods to be "treated" is achieved with; Tfarmeaust made of brazen according to the invention, which contain two or more pairs of interlocking screws, of which "adjacent pairs" are connected to rotate in opposite directions. The .Fig. 4 and 5 show the. Arrangement of the screws of such an exchanger with two pairs of intermeshing screws. With him, of the "four screws 7, 8, 9 and TO" form the two screws 7 and 8, a pair of mutually combing screws and; the ..; ..- two screws 9 and 1-0 a second such pair .. the V - four screws are in known, in the Abb.ν - connected unillustrated ¥ else together so ^that: the screw 7 and 8 to rotate in the sense of / ,, clockwise when the screw.. 9 and: 10 turn counterclockwise. And vice versa.. ^{: VV-}

The heat transfer medium becomes the.

Screws, expediently by means of a two-stage bore.12. The two tubes and the further stage of the .. "bore extend to the beginning of the screw. The narrower bore provides the connection to the end of the screw. radial bore 13 with the ^{bore 12 lying in the screw axis:} in connection. - "- - _;

12/09 100 SO T. 1.03 α

KALLE AKTIENGESELLSCHAFT Company. . - Our sign day sheet

Gm 194 - .. ■ ■. SP-Dr.P, -us .26.-3.1963 -7-

Hinsiclitlicli of free space for that. The substance to be treated and the size of the exchange surface are very "advantageous" double-flighted sun corners. For double-flighted snails, the cross-section of the free space between , but with sufficient accuracy for practical .Use.,: ·; representing, if it is assumed that the width s of the edge 3 at the outer circumference is Sehn corner · small compared to the outer Sehneckendurchmes.ser D, the Schnecken-- ■ '■. ". '■ core diameter d and the pitch of the screw flights h, and if the outer screw diameter D = 2 d;

sin

ι-1 · (i - ·) 3- i- 0.5

In this formula, a means half the wavelength of a sine function. If h and s are to be regarded as given quantities, it is ( ¹ O - s). The cross section 4 g. of the free passageway 4- between two worm threads has - '. each one. Plane made by a piece of rope. Curve is limited, which corresponds to a sine function ■■ ", whose -amplitude is equal to -χ and whose wavelength is equal to- 3 · (-ö - s), ie equal to" three times the difference between half the pitch h, the screw threads and the Width s of edge 3 on the outer.

12/09 100 50 T. 1.63 α

company

KALLE AKTIENGESELLSCHAFT

Gm 194

Our signs tag sheet

SP-Dr.P, -us 26.3.19 & J: -8-

The screw circumference is «The section of the curve is ■ -

fir 5'ΙΓ

between the angle values 7- and ? ■ limited. The ■ "■""." The width s of the edge 3 corresponds to in the figures 1 and: 5>_;; illustrated cases of double the thickness of the screw.
leaves 2, in the case shown in Fig. 2 ^: it corresponds to the .thickness of the attached strip 5.

The snail one of these 'formula, off / ;. .

guided screw heat exchanger is, for example,. ·. shown in Fig. 1.

12/09 100 50 T. 1.63 a

Claims (6)

RA.215BB2-29.A13 KALLE AKTIENGESELLSCHAFT Company Our characters Day sheet 194 SP-Or.P.-us 26.3.1963 -9- Protection a.-Η- s ρ r ü c he · ;. : -; - "::; 1. Screw heat exchangers with at least two ^; interlocking screws with hollow, with cooling v or; . Heating means chargeable from son corner leaves - ..: worm flights, characterized in that the worms are connected to each other to rotate in the same direction _: and. interlock in such a way,. that.-the outer thread kariiin,; (3; .a-} "of each worm thread in the / entire meshing area; '. the abutting lanks.n (2 a and 2- d) of two worm threads of the adjacent worm pass closely * " 2. Son heat from exchanger according to claim-T., .- -. characterized in that the at the extreme worm / "■ circumferentially extending edge (3) - of the flights of a \, the auger blades mounted in a ^radial;.:. calibration Tung extending strip (5) is formed .. '.' -:. " 3. screw heat exchanger according to claim 1.,; 3 ■■ '■ characterized in that the two son corner leaves ·. of the worm threads on the worm circumference are a bit (.6) "■ ·" one on top of the other. . "■■■■■ - .. ·.; ___ -.". 12/405 30 T. 12. 62 a KALLE AKTIENGESELLSCHAFT Company Our sign tag sheet . ''Gm-194 - -' ■ "'■■ SP-Dr.P.-us" 26.3. ^: 1962 / -Ϊ0- 4. - - Screw heat exchanger according to-Jnsprueh ΐ to 3, characterized, - He sat at least two · .Pairs _. (7, 8 and 9 j 10) contains interlocking screws and ^: each 'neighboring pairs are connected to each other to rotate in opposite directions. . . . _: "_ ^: " 5. - - Screw heat exchanger according to claim ΐ up to 4j characterized in that the screws with \ min-_ ■ ■: at least two worm flights are provided.,; ; ; ■ V -.;. 6. "'screw heat exchanger with two-flight screw according to claim 1 to A-, characterized in that the cross section (4 q.) Of the free passage." (4) \. between the Schneekengang. is. limited. by a curve, _ 11T ^ TT which runs between the angle values ^ "and § ■" according to a, sine-- .. function, the amplitude of which is equal to half the .- ... - ■ ..,. Screw diameter and its wavelength equal to three times the difference between half the pitch (h) of the. . · ■■ '■;> worm threads and the width (s) of the edge (3). at the outermost "'circumference of the worm is.". . . '_:;-,' \ KAIIiB 12/405 30 T. 12. 62 α