DE102008029115A1 - Production of a header with nozzles - Google Patents

Abstract

The invention relates to a method for producing a device, in particular a plate heat exchanger, as well as the device itself, which consists of a plurality of stacked passages, which are suitable to be flowed through by liquid and / or gaseous media, wherein the passages form a block 3 , and wherein the device has means (headers) 1 for feeding or discharging at least two media into the block 3, as well as suitable pipe pieces (nozzles) 2 for feeding or discharging the media into the headers 1. Header 1 and nozzle 2 are recognizable from a piece of material and were milled out of an extruded profile with full cross-section.

Description

The The invention relates to a method for producing a device consisting of a plurality stacked arranged Passages that are suitable of liquid and / or gaseous Media to be flowed through, with the passages a block form, wherein the device means (header) for supply and discharge of at least two media in the block, as well as suitable pipe pieces (Nozzle) for feeding or discharging the media into the headers and a device made in this way. The invention is based on the example of a brazed plate heat exchanger made of aluminum, but is in principle for each Device with stacked arranged, permeable Passages suitable, which has headers and nozzles. The invention is therefore not limited to this example.

brazed Aluminum plate heat exchangers are available in numerous Systems used at various pressures and temperatures. They are used for example in the decomposition of air or the liquefaction of natural gas.

Such a plate heat exchanger is z. In "The standards of the brazed aluminum plate-fin heat exchanger manufacturers association" ALPEMA Report (2000) described. Such a plate heat exchanger consists of a plurality of stacked passages. The passages are separated by separating plates and sealed by end bars at the edges. In the passages is a wave-shaped profile (the so-called fins), which is at its reversal points in Wärmeleitkontakt with the dividing plates. The passages have additional openings for the supply and discharge of the media. The heat exchange between different media takes place indirectly between two, flowing in adjacent passages, media on the dividing plates. The entire heat exchanger block is sealed to the environment via cover plates. On the heat exchanger block means for supplying and discharging the media are arranged in the heat exchanger block. These funds are called headers and serve to distribute the media to the individual passages. The supply and removal of the media to the plate heat exchanger and thus to the headers via suitable pipe pieces (nozzle), which are tightly connected to the headers. Such heat exchangers are suitable for heat exchange of a plurality of supplied media.

The prior art has various forms of headers. The headers are mostly semi-cylindrical with various configurations of the ends (eg, semi-circular end pieces). Also known in the art are dome-type headers that fully bulge over a portion of the heat exchanger block. On the known headers, the nozzles are introduced into previously released openings of the upper half-shells and welded firmly to the prior art. The nozzles are usually suitable pipe sections. According to the prior art, such assemblies are produced exclusively by welded constructions (see, for example, US Pat. ALPEMA Report (2000), Chapter 5.12.2.1 "The standards of the brazed aluminum plate-fin heat exchanger manufacturers association" ).

at Such a method according to the prior art, the Header from along the preferred axis halved tubes, from half-shell-shaped Extruded profiles or made of sheets, which in the desired semi-cylindrical or otherwise form brought become. The two open ends of these headers are welded through Fittings also made of sheet metal or extruded profile closed. To install the nozzle is a corresponding opening cut into the semi-cylindrical profile of the header into which the nozzle is welded.

The Manufacture of the existing header and socket assembly is Manufacturing technology relatively complex, especially by the aluminum welded joint between header and Support. Such a welded connection is difficult only be carried out by specially trained personnel and requires a subsequent non-destructive Weld inspection.

Of the The present invention is therefore based on the object, a method for producing a device of the aforementioned Art and a device such that the difficult Welded connection between header and nozzle avoided becomes.

The posed task is procedurally solved by that headers and nozzles from a piece of material using a machining process are made.

The basic idea of the invention is based on not making headers and nozzles as two separate components, but to consider the combination of header and nozzle as a component and piece of material. The inventive machining of the combination of headers and nozzles from a piece of material eliminates complex and expensive welding work and the non-destructive weld inspection. Although the machining cost of the method according to the invention is higher than in a method according to the prior art, nevertheless the entire production in its entirety is simplified. The main advantage of the invention consists in the elimination of the complicated welded joints, which can be performed only by consuming qualified personnel.

Especially are preferred with the method according to the invention Plate heat exchanger made of aluminum, which consist of a multiplicity of stack-shaped passages, which are suitable for liquid and / or gaseous media to be flowed through, wherein the passages heat exchanger block form, and the plate heat exchangers headers to Removal of at least two media and nozzles for Supply or discharge of the media in the header.

In an advantageous embodiment of the invention are headers and Stub of a solid material, preferably an extruded profile or a forging blank. Extruded profiles with full cross-section or blacksmith blanks form in an advantageous Way of solid material, machined from the header and neck as a component can be produced.

Prefers The headers and nozzles are milled out of an aluminum extruded profile. In this embodiment of the invention are with extruders and Milling two proven methods of the prior art for the inventive production of an input used device described.

the device side The object is achieved by a device of the aforementioned Kind solved, at the header and nozzle of a piece of material consist.

Especially the device according to the invention is preferred as a plate heat exchanger for heat exchange between at least two media used.

With In particular, the present invention succeeds in headers and nozzles in a device of the type mentioned without a to produce complex and complicated welded joint. The Manufacturing process can be done without specially trained personnel and without a complicated subsequent non-destructive Test be performed.

in the The invention is based on comparison of a in the figure illustrated embodiment with the prior art be explained in more detail.

It demonstrate

1 various header-socket combinations of a heat exchanger block according to the prior art

2 an embodiment of a header-socket combination according to the invention

In 1 various header and nozzle combinations of a plate heat exchanger are shown, as prepared in the prior art and in the ALPEMA Report (2000) are described. As explained in the description, the headers 1 molded from half-shell extruded profiles or the like in the desired manner and provided with end plates. In the headers 1 then an opening for the nozzle 2 cut. The stub 2 will be in the header 1 shrink wrapped. After the necessary non-destructive weld inspection, the header-stub combination is placed on the heat exchanger block 3 attached.

In 2 an embodiment of a header-prong assembly according to the invention for attachment to a plate heat exchanger is shown. header 1 and neck 2 are recognizably made of a piece of material and were milled out of an extruded profile with a full cross-section.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited non-patent literature

• - ALPEMA Report (2000) [0003]
• - ALPEMA Report (2000), Chapter 5.12.2.1 [0004]

Claims (6)

Method for producing a device consisting of a multiplicity of stack-shaped passages which are suitable for flowing through liquid and / or gaseous media, the passages comprising a block ( 3 ), the device comprising means (header, 1 ) for feeding or discharging at least two media into the block ( 3 ), as well as suitable pipe pieces (neck, 2 ) for supplying or discharging the media into the headers ( 1 ), characterized in that headers ( 1 ) and nozzles ( 2 ) are produced from a piece of material by means of a machining process. Process according to claim 1 for the production of a plate heat exchanger, characterized in that headers ( 1 ) and nozzles ( 2 ) are machined from a piece of material. Method according to claim 1 or 2, characterized in that headers ( 1 ) and nozzles ( 2 ) are made of a solid material, preferably an extruded profile or a forging blank, machined. Method according to one of Claims 1 to 3, characterized in that headers ( 1 ) and nozzles ( 2 ) are milled out of an aluminum extruded profile. Device consisting of a plurality of stacked passages adapted to be traversed by liquid and / or gaseous media, the passages comprising a block ( 3 ), the device comprising means (header, 1 ) for feeding or discharging at least two media into the block ( 3 ), as well as suitable pipe pieces (neck, 2 ) for supplying or discharging the media into the headers ( 2 ), characterized in that headers ( 1 ) and nozzles ( 2 ) consist of a piece of material. Use of a device according to claim 5 as Plate heat exchanger.