HEAT EXCHANGER IN A COLONNADE-ARRANGEMENT AND PROCESS FOR THE PRODUCTION THEREOF

Abstract: Heat exchanger in a colonnade-arrangement, with which the pipes performing actual heat exchange are fixed between the collecting pipes. The process for the production of the heat exchanger is also forming the object of the invention. The essence of the heat exchanger in a colonnade-arrangement according to the invention lies in, that it consists of heat exchanging and collecting pipes with optional cross-sections, and the ends of the heat exchanging pipes are bevelled at least on their sides facing the studs belonging to the collecting pipes. The peaks of a heat exchanger pipe each is bearing up against the wall lying opposite to the bore receiving the heat exchanging pipes, while the heat exchanging pipes are fixed by glueing to the collecting pipes. The essential feature of the process according to the invention lies in that the bores of the collecting pies receiving the heat exchanging pipes are flanged, while the parts of the heat exchanging pipes which are coming into contact with the collecting pipes are knurled and the knurled surface is provided with an adhesive. Subsequently the heat exchanging pipes are fitted into the collecting pipes in such a manner, that they are bearing up against the wall lying opposite to the bores of the collecting pipes; after having fastened the heat exchanger, finishing work may be performed.

Description: Heat exchanger in a colonnade-arrangement and process for the production thereof Technical field The invention relates to a heat exchanger in a colonnade- arrangement, at which the pipes enabling the actual heat exchange are fixed between the collecting pipes. The heat exchanger according to ' the invention can be equally used under operational conditions both with atmospherical pressure and a considerable internal overpressure. The process for producing the heat exchanger is also forming the object of the invention, according to which out of the heat exchanging pipes having been inserted between the collecting pipes, expediently all the heat exchanging pipes can be simultaneously fixed. Background art With the known heat exchangers in a colonnade-arrangement of a similar system fixation of the collecting pipes and of the heat exchanging pipes having been inserted between the collecting pipes has been performed by welding. With these heat exchangers the mutual distance between the heat exchanging pipes cannot be less, than a predetermined value, otherwise the heat exchanging pipes cannot be welded to the collecting pipes. As a consequence, the space requirement of these type of heat exchangers of the known construction is considerably large. A further drawback of the construction lies in, that cost of production is high and due to the fact, that the heat exchanging pipes have to be welded individually, the process is utmost time-consuming. As a matter of fact, the mode of construction of the known heat-exchangers in a colonnade-arrangement determines the process of production and vice—versa. The known processes are very expensive, as the majority of the work is to be performed manually. When applying the known processes, in the collecting pipes bores according to the spacings are to be bored, while the pre-cut heat exchanging pipes have to be fitted into the bores one by one and welded to the collecting pipes by a circimferential corner weld. The heat exchangers in the colonnade-arrangement presently used and the process for the production thereof are unsuitable for mass production; the production requires skilled workers and the individual matching -» beside its time—consuming character — represents the source of several errors not only during production, but also in use. Disclosure of Invention The aim of the invention has been to provide a heat exchanger in the colonnade-arrangement with a less specific space requirement and smaller weight, in comparison to the heat exchangers of similar systems transferring the same heat quantity. The aim set for the invention has been to provide a process, which enables the omission of individual matching and welding, in course of the fixation of the heat exchanging pipes to the collecting pipes. The aim set is achieved by means of the heat exchanger in the colonnade-arrangement according to the invention in such a manner, that the ends of OA'.PI ' the heat exchanging pipes are bevelled and led through the bores of the collecting pipes thatwey that the pointed ends of the heat exchanging pipes are bear¬ ing up against the wall lying opposite to the bore and in the collecting pipes the bores receiving the heat exchanging pipes are flanged; in such a manner the walls of the flanging are quasi forming a casing for the heat exchanging pipes, furthermore the heat exchanging pipes are fixed by glueing in the flanged bores of the collecting pipes. Preferably the collecting pipes are prepared with a square cross-section, since in such a manner ' the heat exchanging pipes can be prepared easier and with a higher accuracy, in addition to this flanging of said bores can be also easier performed. The heat exchanger according to the invention may be realized in a single-row or in a multi-row arrangement. At a preferred embodiment of the invention the ends of the heat transferring pipes are bevelled along two planes enclosing an acute ancle with each other instead of having been bevelled along o,ne single plane. In sense of the process according to the invention serving for the production of the proposed heat exchanger the ends of the heat exchanging pipes cut to size are bevelled, at the same time in the collecting pipes the bores are prepared in accordance with the required spacings and the bores are provided with a peripheral flanging. Subsequently, the parts of the heat exchang¬ ing pipes to be situated next to the flanges of the collecting pipes are knurled and an adhesive is applied onto the pipe sections. In the following operational phase the heat exchanging pipes a re fitted into the bores of the collecting pipes facing each other in such a manner, that the ends of the heat exchanging pipes should bear up against the wall facing the bored side of the collecting pipes; after having applied the suitable pressure, the complete heat exchanger may be shaped to its final form. For performing the process according to the invention a simple single-purpose construction may be prepared and the production of the heat exchanger may be realized almost without human intervention. In course of the application of the heat exchanger and the process for the production thereof the mutual distance between the heat exchanging pipes has not been restrict¬ ed for technical reasons. Accordingly, the essential feature of the heat exchanger in a colonnade-arrangement according to the invention lies in, that it consists of heat exchanging and collect-* ing pipes of optional cross—sections and the ends of the heat exchanging pipes are bevelled at least on their sides facing the studs belonging to the collect- ing pipes; the pinted part of the heat exchanging pipes each are bearing up against the walls facing the bores of the collecting pipes receiving the heat ex¬ changing pipes and the heat exchanged pipes are fixed to the collecting pipes by glueing. The essence according to the invention lies in that the bores of the collecting pipes receiving the heat exchanging pipes are flanged, while the heat exchanging pipes are knurled and provided with an adhesive on the surfaces contacting the collecting pipes. Subsequently, the heat exchanging pipes are fitted into the bores of the collecting pipes in -such a manner, that they are butting on the walls facing the bores of the collecting pipes and after having fastened the heat exchanger, •" BUREAU CΛ.PI finisching work may take place. Brief Description of Drawings The heat exchanger according to the invention will be described in detail by means of a preferred embodiment, by the aid of the accompanying drawing, wherein: figure 1 is the front view of the embodiment realized in a single-row arrangement, figure 2 is showing the left-side view of the embodiment according to figure 1, figure 3 is an enlarged part of the figure 1, indicated with "A". Best Mode of Carrying out the Invention With the embodiment having been illustrated in the ' figures the collecting pipes 1 are prepared with a square cross-section, the heat exchanging pipes are fastened inbetween. The heat exchanging pipes 2 are fixed in the bores 4 having been machined in the sides of the collecting pipes 1 facing each other. The bores 4 are flanged, the heat exchanging pipes are fixed by applying an adhesive. The collecting pipes are provided with an inlet and an outlet stud 6, 7, respectively, for charging resp. discharging the heat carrier. The ends of the heat exchanging pipes 2 lying in the collecting pipes 1 are bevelled, the bevelled parts are facing the studs of the collecting pipes, resulting in advantageous streaming conditions within the heat exchanger. As xt is to be seen, the peaks 3 of the bevelled heat exchanging pipes are butted on the walls 5 facing O PI ^ '. -OJH' S OAβ BAD ORIGINAL Λ 'A ■- 1P0 - r. - the bored side of the collecting pipe 1. This construction is to be considered as most advantageous from the point of view of production. In sense of the process according to the invention both the heat exchanging and the collecting pipes may be pre-cut to the required length, the heat exchanging pipes are to be bevelled. The ends of the collecting pipes 1 may be sealed e. g. by welding, the same process may be applied with the studs 6, 7. After having marked the spacings, the bores 4 on the collecting pipes 1. may be prepared. In order to ensure better clamping of the heat exchanging pipes, the bores 4 are to be flaged. The sections of the heat exchanging pipes 2 which will presumably lie in the enviroment of the flanges of the bores 4 are to be knurled, subsequently an adhesive is to be applied onto the knurled surfaces. The heat exchanger with the elements having been pre¬ pared in the described manner is assembled so, as the single heat exchanging pipes are fitted one after the other, in the proper order of sequence, through the bores 4 into the collecting pipes 1, while the peaks 3 are bearing up against the walls 5. After having placed the heat exchanging pipes in the required number, the heat exchanger is fastened by means of a suitable device for the period, during which the adhesive is hardening, i. e. binding. The heat exchanger according to the invention may be prepared in such a manner, that colonnades running parallel with each other may be formed of the heat exchanging pipes 2. At a preferable embodiment the ends of the heat exchanging pipes are not bevelled along one single plane, but e. g. along planes inclining ' .*-. ' AD R 1 — / towards each other. These possible embodiments depend on the prevailing requirements relating to production and application and do not influence the essence of the invention. 5 As it becomes obvious from the aforesaid, the mutual distance between the pipes of the heat exchanger according to the invention has not been restricted for technical reasons. Accordingly, with the proposed heat exchanger - compared to known solutions - work- 10 ing with the same capacity, the weight and space requirement may be reduced. When compared to the known processes, in respect to the process of production advantageous features can be observed to the credit of the process according to 15 the invention, thus e. g. assembly of the heat ex¬ changer takes place in a simple manner, without difficulties. Welding may be omitted, qualified skilled workers become superfluous. A further advantage lies in, that by using the heat exchanger according to 20 the invention and the process for the production thereof, mass production becomes possible.

Claims: - b - Claims : 1. Heat exchanger in a colonnade-arrangement, in particular to central heating, c h a r a c t e r i z e d in that it comprises heat exchanging pipes /2/ -and collecting pipes /I/, both with optional cross- sections and the ends of the heat exchanging pipes /2/ are bevelled at least on their sides facing the studs /6, 7/ belonging to the collecting pipes /I/ and the peaks /3/ of the heat exchanging pipes each are bear¬ ing up agaire t the walls /5/ of the collecting pipes /I/ lying opposite to the bores /4/ therein receiving the heat exchanging pipes /2/, while the heat ex¬ changing pipes are fastened to said collecting pipes by glueing. 2. Heat exchanger according to claim 1, c h a r a c t e r i z e d in that between the collecting pipes /l/ heat exchanging pipes /2/ are arranged in one or more rows, having been displaced in relation to each other in the single rows. 3. Heat exchanger as claimed in claim 1 or 2, c h a r a c t e r i z e d in that the collecting pipes /_./ are formed with a square cross-section, while the heat exchanging pipes /2/ are having a circular cross—section. 4. Process for producing the heat exchanger according to any of the claims 1 to 3, c h a r a c -. t e r i z e d in that the bores /A/ of the collect¬ ing pipes /I/ receiving the heat exchanging pipes /2/ are flanged and the parts of said heat exchanging pipes being in contact with said collecting pipes are knurled and provided with an adhesive, subsequently, the heat exchanging pipes /2/ are fitted into the bores /A/ of the collecting pipes /!/ in such a manner. O.'ΛPI that they are bearing up against the walls /5/ of the collecting pipes facing the bores /A/ therein and after having fastened the heat exchanger, finish work is performed.

Inventors: DOLGOS IMRE, HORVATH ISTVAN, TAKACS SANDOR, ZAGONI LASZLO, ZAVODI IMRE
Applicants: DUNAI VASMU, DUNAI VASMUE
Application year: 1981
Main classification: F28D7
IPC codes: F28F9