CH302665A - Elbow. - Google Patents
Elbow.Info
- Publication number
- CH302665A CH302665A CH302665DA CH302665A CH 302665 A CH302665 A CH 302665A CH 302665D A CH302665D A CH 302665DA CH 302665 A CH302665 A CH 302665A
- Authority
- CH
- Switzerland
- Prior art keywords
- pipe
- section
- bend
- bent
- sections
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
- F24H1/145—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Description
Rohrbogen. Die Erfindung bezieht sich auf Rohrbägen, insbesondere zum Verbinden von Rohrab schnitten von Wärmeaustauschern für gasbe- heizte Durchlauferhitzer.
Bisher wurden Rsshrbögen der genannten Art aus im Querschnitt kreisrunden Rohren gebogen, deren Innendurchmesser etwa denn Aussendurchmesser der zu verbindenden Rohr- abschnitte entspricht. Solche runden Rohre müssen mit einem verhältnismässig grossen Krümmungsradius gebogen werden, da bei Unterschreiten -eines Mindestkrümmungsradius die Gefahr besteht,
dass die Rohre am In nenbogen einknicken. Der Abstand zwischen den zu verbindenden Rohrabschnitten des Wärmeaustauschers russ bei Anwendung, sol eher Rohrbögen daher ebenfalls verhältnis mässig gross sein. Ferner liegt dabei auch der Krümmungsscheitel dieser Rohrbögen in einem entsprechend weiten, Abstand von den Ansehlussenden der zu verbindenden Rohrab schnitte, so dass der Wärmeaustauscher grö ssere Abmessungen erhält, als vom wärmetech nischen Standpunkt aus erforderlich ist.
Die Abmessungen des Wärmeaustauschers können demgegenüber ohne Änderung des wärmetechnischen Wirkungsgrades wesentlich verkleinert werden, wenn gemäss der Erfin, dung die Rohrbögen. aus einem im Querschnitt ovalen Rührstück hergestellt sind, welches in der durch die Rohrmittellinie verlaufenden Ebene der geringsten Rohrlichtweite gebogen ist.
Diese Rohrstücke können mit einem we sentlich kleineren Krümmungsradius gebogen werden als im Querschnitt kreisrunde Rohre, so dass der Abstand der Ansehlussöffnungen voneinander und die Scheitelhöhe des Bogens kleiner als bei Rohrbögen mit runden Rohren sind.
Auf der Zeichnung ist der Gegenstand der Erfindung an .einem Ausführungsbeispiel veranschaulicht. Es zeigen.: Fig. 1 eine Draufsicht eines Wärmeaus- tauschers für ,gasbeheizte Durchlauferhitzer, Fig. 2 einen Längsschnitt durch einen Rohrbögen, Fig. 3 einen Schnitt nach Linie III-III der Fig. 2.
o Durchs den Lamellenmantel 1, welcher den ganzen Wärmeaustauscher umschliesst, sind mehrere Abschnitte 2 eines Wasserrohres hin durchgeführt, welches einerseits an den Kalt wasserzufluss und anderseits an den Warm wasserablauf angeschlossen ist.
Auf den Rohr abschnitten 2 sind eine Anzahl Blechlamellen S 'in einem gewissen Abstand voneinander an geordnet, die mit ihren Stirnseiten an den gegenüberliegenden Stellen des Lamellenman- tels 1befestigt sind. Die durch den Lamellen- mautel hindurchragenden äussern Enden der Rohrabschnitte 2 sind durch Rohrbögen 4 miteinander verbunden.
Diese Rohrbögen 4 sind aus einem im Querschnitt ovalen Rohr stück hergestellt, welches in der in Fig. 3 durch eine strichpunktierte Linie 5 angedeu- teten, durch .die Rohrmittellinie verlaufenden Ebene der geringsten Lichtweite des Rohres in die gewünschte Form gebogen ist. Die offenen, geraden Anschlussenden 6 des Rohr bogens sind zu kreiszylindrischen Anschluss stutzen ausgeweitet, welche auf die Anschluss enden der Rohre 2 aufgeschoben und dann durch Löten oder Schweissen befestigt werden.
In Fig. 1 ist ein in der bisher üblichen Art aus einem im Querschnitt kreisrunden Rohrstück hergestellter Rohrbogen 7 gestri- chelt angedeutet. Es ist ersichtlich, dass die Scheitelhöhe ca und die äussere Länge b des beschriebenen Rohrbogens wesentlich kleinere Abmessungen haben als die entsprechenden Abmessungen a' und b' der bisher bekannten RohrbogenfQrm.
Elbow. The invention relates to pipe bends, in particular for connecting Rohrab sections of heat exchangers for gas-heated instantaneous water heaters.
So far, Rsshrbögen of the type mentioned have been bent from tubes with a circular cross-section, the inside diameter of which corresponds approximately to the outside diameter of the pipe sections to be connected. Such round pipes must be bent with a relatively large radius of curvature, since if the radius of curvature falls below a minimum there is the risk of
that the pipes buckle at the inner bend. The distance between the pipe sections to be connected of the heat exchanger soot when used, so pipe bends should therefore also be relatively large. Furthermore, the apex of the curvature of these pipe bends is at a correspondingly wide distance from the connection ends of the pipe sections to be connected, so that the heat exchanger has larger dimensions than is necessary from the thermotechnical point of view.
In contrast, the dimensions of the heat exchanger can be reduced significantly without changing the thermal efficiency if, according to the invention, the pipe bends are made. are made from an oval cross-section stirring piece, which is bent in the plane of the smallest tube clearance running through the tube center line.
These pipe pieces can be bent with a much smaller radius of curvature than pipes with a circular cross-section, so that the distance between the connection openings and the apex of the bend are smaller than in pipe bends with round pipes.
In the drawing, the subject matter of the invention is illustrated by an embodiment. 1 shows a plan view of a heat exchanger for gas-heated instantaneous water heaters, FIG. 2 shows a longitudinal section through a pipe bend, FIG. 3 shows a section along line III-III of FIG.
o Through the lamellar jacket 1, which encloses the entire heat exchanger, several sections 2 of a water pipe are carried out, which is connected on the one hand to the cold water inlet and on the other hand to the hot water outlet.
On the pipe sections 2 a number of sheet metal lamellas S 'are arranged at a certain distance from one another, which are fastened with their end faces at the opposite points of the lamellar jacket 1. The outer ends of the pipe sections 2 protruding through the lamellae are connected to one another by pipe bends 4.
These pipe bends 4 are made from a pipe piece which is oval in cross section and which is bent into the desired shape in the plane of the smallest clear width of the pipe, indicated in FIG. 3 by a dash-dotted line 5 and running through the pipe center line. The open, straight connection ends 6 of the pipe bend are expanded to form circular cylindrical connection pieces, which are pushed onto the connection ends of the pipes 2 and then fastened by soldering or welding.
In FIG. 1, a pipe bend 7 produced in the hitherto customary manner from a pipe section with a circular cross-section is indicated by dashed lines. It can be seen that the apex height ca and the outer length b of the pipe bend described have significantly smaller dimensions than the corresponding dimensions a 'and b' of the previously known pipe bend shape.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE302665X | 1951-08-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH302665A true CH302665A (en) | 1954-10-31 |
Family
ID=6107161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH302665D CH302665A (en) | 1951-08-20 | 1952-07-21 | Elbow. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH302665A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008078219A1 (en) * | 2006-12-22 | 2008-07-03 | Turk Demir Dokum Fabrikalari Anonim Sirketi | A heat exchanger |
-
1952
- 1952-07-21 CH CH302665D patent/CH302665A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008078219A1 (en) * | 2006-12-22 | 2008-07-03 | Turk Demir Dokum Fabrikalari Anonim Sirketi | A heat exchanger |
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