SU837681A1

SU837681A1 - Method of producing modular heat exchanger tube bundles

Info

Publication number: SU837681A1
Application number: SU792816291A
Authority: SU
Inventors: Олег Владимирович Беляев; Владимир Михайлович Захаров
Original assignee: Предприятие П/Я А-7755
Priority date: 1979-07-02
Filing date: 1979-07-02
Publication date: 1981-06-15

Description

1one

Изобретение относитс к изготов ению теплообменных- аппаратов и может быть использовано в энергетическом, химическом и транспортном машиностроении.The invention relates to the manufacture of heat exchangers and can be used in power, chemical and transport engineering.

Известны способы изготовлени трубных пучков теплообменников, заключающиес в том, что концы теплообменных трубок привариваютс к штуцерам коллекторов встык, что позвол ет получать надежное соединегше труб с коллекторами, а также обеспечивает качественный контроль сварных соединений 1.There are known methods for manufacturing tube bundles of heat exchangers, which consist in the fact that the ends of the heat exchange tubes are welded end-to-end to the manifold nipples, which makes it possible to obtain a reliable connection of the tubes to the collectors, and also provides high-quality control of the welded joints 1.

Недостатками этих способов вл етс то, что их невозможно осуществить при малом . шаге трубок пучка, так как при приварке к коллектору каждой трубки уже приваренные соседние трубки мешают или не позвол ют приварить остальные трубки. Поэтому приходитс шш увеличивать размеры коллектора, или предварительно объедин ть по 2 или более трубок или делать составными коллектор или его трубную доску, а также приваривать к концам трубЬк переходники меньшего диаметра , что приводит к увеличению трудоемкости изготовлени , уменьшению надежностиThe disadvantages of these methods are that they cannot be implemented with little. step of the tubes of the beam, since when welding to the collector of each tube, the already welded adjacent tubes interfere or do not allow welding of the remaining tubes. Therefore, it is necessary to increase the size of the collector, or pre-combine 2 or more tubes or make a collector or its tube plate as a component, and also weld smaller diameter adapters to the ends of the tubes, which leads to an increase in labor intensity, reduced reliability

(увеличиваетс количество сварных швов), увеличению габаритов трубных пучков и теш1О обменника в целом. Стесненные же услови дл сварки остаютс . Кроме.того, в результате разной усадки сварных швов одновременна пристыковка всех трубок ко всем штуцерам обоих коллекторов затруднена или невозможна без забойных участков.(the number of welds increases), an increase in the dimensions of the tube bundles and tesh1O of the exchanger as a whole. Constrained welding conditions remain. In addition, as a result of different shrinkage of welds, simultaneous attachment of all tubes to all fittings of both collectors is difficult or impossible without bottomhole sections.

Известен также способ изготовлени трубных пучков теплообменников, при котором концы трубок вставл ютс в отверсти трубных досок и привариваютс к ним со стороны торцов труб.A method of manufacturing tube bundles of heat exchangers is also known, in which the ends of the tubes are inserted into the holes of the tube plates and are welded thereto from the ends of the tubes.

При применении этого способа устран ютс стесненные услови дн сварки,по вл етс возможность автоматизировать сварку , отпадает необходимость в забойных участках . Таким способом можно объедин сь трубы теплообменников с плотной компановкой труб.When applying this method, constrained welding conditions are eliminated, it becomes possible to automate welding, and there is no need for downhole sections. In this way, it is possible to combine heat exchanger tubes with a dense arrangement of tubes.

Claims

However, according to this method. the holes in the tube plates of the collectors need to be made with a diameter not less than the outer diameter of the tubes) and, therefore, must be left between the tubes. Another distance equal to the bridge between the holes (at least 1.5-2 mm in ("temporary heat exchangers). The purpose of the invention is to reduce the dimensions of the collectors. This goal is achieved by the fact that in the proposed method of manufacturing tube bundles of heat exchangers, including installation and welding pipes to collectors for supplying and discharging coolant, some of the pipes are welded to the tube plate of the collector for discharging coolant from the side facing the trough beam, the other to the tube plate of the collector supplying coolant from the side facing A tube bundle, then the free ends of the tubes welded to the tube plate of the first collector are inserted into the holes of the tube plate of the second collector, and at the same time the free ends of the tubes welded to the tube plate of the second collector are inserted into the holes of the tube plate of the first collector, after which The openings of the ends of the pipes are welded to the pipe boards at the ends of the latter in a known manner. For carrying out the method, part of the openings are made with a diameter equal to the inner diameter rub pipe and the other part - rum of diameter equal to the outer diameter of the tube and the apertures arranged adjacent have different diameters. Welding of the pipes to the tube plate on the side facing the tube bundle 1 is carried out with a relatively small HeifflocTH loop, like during the welding part, the tubes are not yet inserted into the holes. The welding of the same pipe to the manifolds for supplying and discharging the coolant in different ways allows for the final assembly of the tubes into bundles in a convenient way without fitting the length of the tubes required when both ends are welded to the bottom of the collector tube sheets. FIG. 1 shows a bundle of pipes with a longitudinal section; FIG. 2 shows section A-A in FIG. D, fig 3 - section bb in fig. D, fig 4 - section in fig. one; in fig. 5 is a section of YYD in FIG. 2 A method of manufacturing a tube bundle involves the installation and welding of pipes to manifolds supplying and discharging coolant. The pipes 1 are welded to the tube plate 2 of the collector 3 of the heat carrier discharge from the side facing the tube bundle, the pipe 4 to the tube plate 5 of the collector 6 sub14 heat carrier water from the side facing the tube bundle. Then the pipes 1 are inserted into the holes of the tube plate 5 of the collector 6, and the pipes 4 are at the same time inserted into the holes of the tube plate 2 of the collector 3. After this, the pipes 1 are welded to the tube plate 5 from the ends of the pipes 1, and the pipes 4 - to the tube plate 2 from the ends of the tubes 4, for example, using the common cladding 7 and 8 method. The proposed method allows to reduce the size of the collectors, which ultimately makes it possible to reduce the hydraulic resistance when the heat transfer medium flows around the collectors. us just over path resistance of the heat-exchanger medium, and hence the energy costs for umenschayuts creation circulates heat-l tion medium. Claims The method of manufacturing tube bundles of modular heat exchangers by installing and welding pipes to the inlet and outlet manifolds, characterized in that, in order to reduce the dimensions of the collectors, a part of the tubes is welded to the tube plate of the coolant outlet manifold from the side facing the tube bundle to the tube plate of the coolant supply collector from the side facing the tube bundle, then the free ends of the pipes welded to the tube plate of the first collector are inserted into the holes of the pipe the second collector board and at the same time the free ends of the pipes welded to the second collector tube plate are inserted into the holes of the first collector tube plate, after which the tube ends inserted into the holes are welded to the tube plates from the ends of the latter in a known manner, while the tube plates are made so that part of the holes in them has a diameter equal to the inner diameter of the pipe, the other part located relative to the first one in a shakhmatny order, has a diameter equal to the outer diameter of the pipe. taken into account during the examination 1. USSR author's certificate N 599941, cl. 23 K 31/06, 1976.

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