DE1810606C3 - Sectional boilers - Google Patents

Description

Light lying parts of the outer Rahrkanal tangentially be arranged zn the arms, and the downstream parts of the outer pipe channel can connect to this approximately at right angles to the axis of the connecting arms.

By narrowing the cross-sections in front of the connection points of the channels with the connecting arms, the angled continuation of the outer channel from the junction with a simultaneous reduction in size dos mouth cross-section opposite the cross-sectional constriction located upstream of the junction as well as through the tangential introduction dss adjoining a respective connecting arm Inflow part of the outer channel is achieved in an advantageous manner that the flow through the outer channel is hindered in favor of a flow through the inner channel, so that the stronger heat stressed wall of the inner channel as a result of an ongoing supply of water lower Temperature is relieved, steam pockets avoided and a much more uniform heat transfer on the entire water cycle. Through the shape of the channels and arms is advantageously achieved that the rate of circulation of the water in the inner channel exceeds that in the outer channel. The angle of incline the arm is between about 20 to 50 ° at the connecting part of the inner pipe channel.

According to a further advantageous feature of the invention it is provided that the arms of eii.er common water inlet opening up to a common water outlet opening an increasing Have length. It is also provided that the cross section of the outer pipe channel behind the connection point the arm is smaller than in front of the connection point. This configuration is the water circulation from the outer channel to the inner channel is also favored.

According to a further advantageous feature it is provided that in the angle of the boiler on the outside a tie rod connecting the boiler sections is arranged.

The invention is explained in more detail using exemplary embodiments. It shows

Fig. 1 is a side view of a sectional boiler, partially broken away,

FIG. 2 is a plan view of the one shown in FIG. 1 Boiler,

F i g. 3 a front view of a section formed from two symmetrical boiler sections,

FIG. 4 shows a sectional view along the line IV-IV according to FIG. 3,

5 shows a section on an enlarged scale of a single boiler section through the central plane, Fig. 6 is a partial section through a further embodiment of the connection of an arm with the outer canal and

FIG. 7 shows a section along the line VII-VII according to FIG. 6.

1 to 4 show a sectional boiler 1 assembled from parts with water circulation. The boiler 1 is essentially formed by a plurality of mutually abutting sections with the general reference symbol S , which are shown in FIGS. and2 are denoted by 51, 52 ... SN , and the number of which changes with the output desired by the boiler. The different sections S are tightened against each other by connecting links described below. Each section A in Figs. 3 and 4) is denoted by two with £

Boiler sections are formed, which are designated in Fig. 3 "f £ ¹ · El and have the same structure, but have symmetrical outlines. The two boiler sections El, E2 are on both sides of the vertical symmetry going through the axis O -O of the furnace.

o metric level AA of the sectional boiler arranged.

The boiler sections E of each section S are each formed by a cast blank, for example made of cast iron, which (see FIGS. 3 and 5) has an inner pipe duct 2 and an outer pipe duct 3, these two ducts being formed by tubular arms 4 are connected, which have a smaller cross-section than these channels. The tubular channels 2 and 3 go from the same in the foot 5 formed zo of the vessel member E chamber from which ^f on the side surfaces thereof in coaxial two Wasserzulaufö 'calculations 6 opens. Likewise, the pipe ducts 2 and 3 end at a chamber formed in the head 7 of the boiler section E , which chamber has two water drainage openings 8 for establishing the connection with the adjacent boiler brackets E , which are surrounded by connecting nipples. The outline of the Rohrkanälfc2, and by 3, the openings 6 and 8 around simple connection ribs 9 and double coupling ribs 11 are longitudinally (see F ig. 4) on the side surfaces of the Kesselgüeder E formed, by means of which successive sections S belonging boiler sections E rigidly and tightly can be brought into engagement with each other. The boiler sections E of the front sections of the boiler 1 have connecting ribs 9 which are interrupted on the pipe duct 2 at some distance from the feet 5, while other connecting ribs are formed on the central arms 4, as is the case on the boiler section E 1 of F i G. 3 is shown.

The boiler sections E1 and El of a section V delimit a central chamber 12. When the different sections S are placed together, the simple connecting ribs 9 of one boiler section enter the double connecting ribs 11 of the two adjacent boiler sections, and the entirety of the chambers 12 forms the furnace of the boiler 1, while that between the arms 4 and the pipe channels 2 and 3 Formed window form the exhaust gas ducts for the return of the exhaust gases, which pass through the interruption of the connecting ribs 9 at the base of the pipe duct 2 into the exhaust ducts 13 to the front part of the boiler 1. The water to be heated is fed through a supply nozzle 15, and the heated water leaves the boiler through a Ableitungsstut zen 16, while the exhaust gases are discharged through the nozzle 1 ".

Referring to FIG. 5, the boiler member has an inner pipe duct 2 with a double bend mung, which includes a semicircular section surrounding the furnace and ii Direction of the water drainage opening 8 straight rieh

part.

The boiler member E is designed so that the order speed of the water in the inner pipe channel 2 is greater than that in the outer Rohrka

nal3 is. For this purpose, the 3 existing in the example with an arm 4 are arms 4 α that are pulled in the direction of flow G. 4 b. 4 c of boiler section E, «rhräo m H <> m f. ·;» ,, »« «/ · · - ··

direction of flow G trains ^hT i ^g α " ^the i ^{ÜhrtC WATER before} preferably in flow direction I.

it ^ unoJ h, ^g I · J ' ^U w ^ "^ ™?' ^d ? u ^e , ^{In in the arm4} ' ^{after it was} accelerated in a flow through the flow direction F of the water m the pipe narrowing 25.

der Winke, * ash of the axis ⁵ i ™ ^ n ^^ n ^^ S! ^ a ^ Tn 2 i J * " ¹ ^ ¹ " ⁶¹¹ ! ¹ !! ⁶ ^! ^{5 pipe duct 2} downstream from the connection under consideration "

of "

₃ where this ratio Q ₁ IQ ₁ , B. 2 concerned- byHuÄ ^ iVöht

Distant / are upstream from every connec- "digfnd ^ Wä ^ stiuS ™ ΤΗ

connection parts between the inner pipe duct 2 and ducts 13 DaTdocS a, S?

4 constrictions 24 provided for the arms, on led wisser ΑΐΛ ί

which through the junction table dem nals2 is w5ch? r fL ZZf u \ M ^

Arm 4 and the pipe channel 2 formed widening- ao must absorb load ? £? * 7 ^ ™ ⁵ ^

so that there is a converging water with less _E Tr higher τΓ ^ Γ Τ λ ™

diverging channel course results. men4 »™ fcSLJ V Temperature from the work

In a corresponding way yes constrictions 25 in dTu _be ? Ä ^ vT n ^ "? ^ ^" ^

Course of the pipe channel 3 at the entrance of the arms 4 pipe channel 2 to ν rhinlem ^{DampftaSchen In d} ™

and upstream from the mouth of the to a ₅ D.nk of the totality Ai _P «* · u ·

Most section of the pipe channel 3 is provided. In doing so, the PrSa * τ- "^ Ä! F * ^M

the outer WeS flowing through in the direction of flow G is compared to ah at dL. ^e J " ^en . ^considerably higher

Pipe channel designed so that at the connection where η η «δ T t, L ^u . ^usual designs,

entry points between two consecutive p? rätu ™ _nter schTe ^^^^

Branches of this pipe channel and an Am a 30 wall ™ " ^de " ^{AbgaSen and the} pressure drop in the downstream in the Pratk ük »» ·. ·· 1 · _L j.
Branch te outer pipe channel in favor of d! S Ar äa ^ S ^ Sh ^^^ t ^ ^ p ™ mes 4 is produced. When executing the Fi g. 5 findune _ßest ä fet Wph ^{kcal / h / l} ? * < ^Wal »rend die Erw this result is obtained by the fact that for the 2ΟΟΟθΜ? Ooob Ä / T ß ^roßen ° ^rdnun g ^sn l ^äßi S inlet opening 26 of the downstream ₃₅ on dLe Way Kesse he ^ l ^ ίί ™ Μ ™ branch a Stromungsnchtung T is provided, rods especially h ^ h ΐ? J ™ 'ί ** "^ ^355εη1εΐ -soft a considerable angle with the middle is K" ww ™ ο ί ¹ I ^ ^VO " ^{the Κ} "'direction of flow U of the upstream lying fs O - a ^ c ⁸ " ⁰ O ^ ^d ' ^{e Forme! Against} the opening of the pipe channel 3 picture«, which roughly draws in So 'νΐήί Γ "" / ^{d 'C exchange surface} ** - runs the direction of the axis V of the arm 4 40 during.' the EntwSk * K ^ ^{"dCr AnmeIderin} same time, the cross section of the Eingangsöff- can Vmucher, f" t ^ n ^ ^Iun ^ ^{arbe -th} made? tion 26 of the downstream Zwdges of the a2? Ä? "TFT ^{that dn voIIständi} g ^he Rohrkanals3 than the smaller the Verengung25 be. VorMIMΚτΟΜkcTÄ ^" ¹ ™ il ^{INEM weight}

The entire for the connection points of the two 47 000 kcpl / hLu natural train and branches of the pipe duct and deVAme4 provided ₄₅ terdfesS BeSi " ^6121111 S. ^under D ™ ck transfers. Unhene shape allows on the outer surface of the boiler with S T ^ T- ^W to form ^{'Cgt ei} """" dun-sgemäßer tubular channel 3 Auspaningen 27th These advertising 78Ö (M0 ™ CAI <J tll? ™ ² ^ ^Τ ° ^ΠΠεη ™ ^{d Iiefert} ausgenatrt to to accommodate Zuganker28, "SS ™ ^" ¹ ^ ¹ ^ ¹ ^ ^to which alternately inserted into holes "stnd ^ VOEN _8ΤηΓ Ρ" ^para ^ ^{hNI 's} ^ ^ ™ double that in the cast of each boiler section e Lap ₅ o feit ^{Walk t and only} 635000kcaI / Liepen h 31 are formed These are bolted accordingly- The dnrrh π ™ ν 1

th tie rods 28 cause the strong connection zeuöe veStS Ϊ * Ü " ^{f the Rol} " channels 2 and 3 of all sections S of the boiler. ^g SL J? ⁶ ^. ^{The arrangement of} the exhaust ducts 13

As a result of the almost tangential arrangement of the ^ νί ^, ^ Τ '^ ΐίΓ ⁸ * ¹¹ * ¹¹ · ^{since this through on} Arms 4 with respect to the pipe duct 2 and the layer 55 are borrowed ^from g ^eb 'Wete doors 30 easily accessible.

these arms in relation to the upstream lie- The above he * «* ™ * a ^ ^

lowing branches of the pipe channel 3 has the boiler eeehme? h « iJF " ^ ^Ausfuh ™ "g« t for boiler

subdivide E arms Aa, 4b, Ac of increasing length, wt Κ ^ Γ!? I ^ ^Section ^ ^KesseI "

the pipe duct 3 gradually moves away from the pipe band SÄ Ah ΐ ™ V ^ indmagsmppel

Kanal2 removed and only fan head 7 again with the 60 ^ efmi zwefSinnS 2Τ · ^ *? * ^{ΠΠΓ dn KtSS} * ^V

Pipe channel 2 unites. BeXt · ^ N'PPe'n have, however, it is under The totality of the budgeted funds contributes to this fJ? ÄS ArSV ^ ^mechanical

at, in the pipe canal a faster liquid RohrSnal ^ o '^ ^ T' * " ^{VeTlaDf des SaBeren}

in the pipe duct 3 to generate insidious profit L ^ ³ "^ ¹ "' ^{that this is a continuous}

a special feature is the flow supply of the pipe duct 2 65 The device «"

from the beginning as a result of the for the cross-sections Q ₁ strömun _ß of ^™ η & ™ improve throughput

and Q ₁ is better. Furthermore there «3teTw« S ^ ''"u ·. '" ^{Der m Fi} & ^{6 md7}

, flows at each connecting point ^ of the pipe channel ÄSS ^^ Si ¹ ^ ^ SÄ

(ο

continuous course is realized, but in the connection zone 33 two curved metal sheets 34 are arranged, which deflect part of the liquid flowing in the flow direction G into the pipe channel 3 in the direction of the arm 4 in the flow direction H. For this purpose, the guide plates 34 are arranged so that they intersect the center line of the pipe channel 3. The baffles 34 are separated by a free space 35 in order to avoid any obstacle in the pipe channel and the expansion

and not to hinder contractions of the boiler section. The guide plates 34 allow a good flow through the arm 4, and lead to a regular flow through the pipe channel 3, the mechanical stresses that are exerted on the boiler section E through the recesses 27 of the previous embodiment are eliminated. The mechanical strength of the boiler section E modified in this way is therefore greater for the same weight.

For this purpose 2 sheets of drawings

Claims (7)

Sectional boilers have significant advantages, patent claims: especially in their easy assembly thanks to the stringing together of the same elements 1. There are sectional boilers with a central supply and storage restriction, Brennunfiskammer and durum arranged 5 One can namely by changing the number of Water cycle, with each boiler section two to boiler sections within certain limits the thermal Adjust the longitudinal axis of the boiler and adjust the boiler output to the needs. In this has outer pipe ducts, however, a limitation occurs due to exhaust gas terms, since one the boundaries, from the outside to the inside the length of the kettle does not exceed a certain amount Pipe duct ascending Anne are connected, io value can increase, because otherwise the thermal characterized in that the efficiency decreases. The same is with one Pipe channels (2, 3) in the direction of flow before the enlargement of its diameter is the case. Further Connection points of the arms (4) cross-section is used at high powers of z. B. over 200,000 have gungen (24, 25) and that the one kcal / h the weight quickly for safety reasons Arm adjoining parts of the outer pipe ca- 15 not permitted. In the case of high performance, a nals (3) an angle to the outside of the boiler bil- sufficient wall thickness must be provided to with the. Certainty the formation of vapor pockets in which the 2. Sectional boiler according to claim 1, thereby avoiding combustion surrounding channel. One characterized that the pocket of this type upstream of the connection would become the water lock when it was formed Prevent lying parts of the outer pipe 20 circulation. The water would evaporate canal (3) tangentially to the arms (4) angeord- what quickly a serious accident due to destruction are net. of the boiler section at the relevant point 3. Articulated boiler according to claims 1 would have a consequence. and 2, characterized in that the downstream There is a sectional boiler known in which the parts of the 25 lying behind the connection points in relation to that placed through the middle of the fire chamber outer pipe channel (3) symmetrically arranged approximately at a right angle perpendicular plane, to the inside the arms (4) are arranged. lying canals mi ', the outer lying canals 4. Articulated boilers are connected via connecting arms after one of the connections. However, sayings 1 to 3, characterized in that the sen these connecting arms compared to the outer arms (4 a, 4 b, 4 c) at an angle (a, b, c) between 30 and inner channels see smaller cross-sections about 20 ° to 50 ° at the connection part of the, so that a water flow from the outer pipe channel (2) are arranged. narrowing canals to the inner canals rather obstructed 5. Articulated boilers according to one of the advantages as favored and the water essentially Proverbs 1 to 4, characterized in that the flows in the outer channels upwards, Arms (4) from a common water inlet 35 which deteriorates the heat transfer Opening (6) up to a common water and thus a reduction in efficiency the drain opening (8) increases the length of the sectional boiler. point. There is also a sectional boiler known at 6. Articulated boiler after one of the other the connection can in one upper, one Proverbs 1 to 5, characterized in that the middle or lower area of the boiler section has a cross-section of the outer Rehrkanal (3) are arranged behind, and connect channels with each other, the connection point of the arms (4) smaller than in front of the one common opening for the supply of water Connection point is formed. ser and a common opening for the suction of the 7. Show sectional boiler after one of the heated water. Because the design Proverbs 1 to 6, characterized in that in 45 of the connecting arms of the known boiler sections, the angle of the outside of the boiler, which has a constant cross-section and constant members (E) connecting tie rods (28) have length, not to improve the net is. Contributes to the cooling water flow and since the cooling water channels are not symmetrical to the combustion chamber 50 are ordered, the efficiency of this pre- knew articulated boilers small. It is also known to provide the individual boiler sections with tie rods running parallel to the longitudinal axis of the boiler to stick together. The invention relates to a sectional boiler with 55. The invention is based on the object that a central combustion chamber and therefore an additional structural design of a sectional boiler ordered water cycle, each boiler section of the aforementioned type in terms of leadership and two inner formation of the flow path of the water circuit running to the longitudinal axis of the boiler and outer pipe ducts aufweisl: to improve the exhaust gas drain in such a way that the heat output the delimiting channels, from the outer to the inner 60 of the boiler, are substantially raised and an accumulation Pipe channel rising arms are connected. of steam bags is avoided. Boilers of the aforementioned type, in which water as this object is achieved according to the invention Coolant is used, are essentially solved for that the pipe channels in the direction of flow of the heating of residential buildings (e.g. for the central points of connection of the arms, cross-sectional central heating of large buildings), for which inductions have 65 and that those attached to an arm are anstrial Heating and similar applications include parts of the outer pipe duct used in which thermal outputs form an angle to the outside of the boiler. In more than z. B. 100,000 kcal / h are required. advantageously the upstream before the connection