JPH0323840B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a matrix hollow profile held in a wall structure which is joined in layers on the end sides, where each of the layers can be joined along opposite surfaces. It consists of two connecting parts, which, before their joining, are provided with a notch for the matrix hollow profile which is open on one side facing each other, in which the end of the matrix hollow profile is inserted after joining, The present invention relates to a method for manufacturing a tube distribution device for a heat exchanger of the type in which two adjacent profile rows are embedded in a spatially offset interlocking manner.

According to the state of the art, a pipe distribution system with a central collecting container or collecting pipe is constructed by fitting the pipe into the wall of the collecting container or pipe having an opening, and then in a material-bonding manner.
For example, they are manufactured in such a way that they are joined by brazing and the collecting container is passed through the inside of the pipe. Penetrations in the collecting vessel wall are formed by drilling or erosion prior to insertion of the tube, which are expensive drilling methods.
The separate installation, especially the insertion, of the tube is relatively complicated, especially because of the narrow play between the tube and the opening in the wall. Moreover, narrow tolerances of holes and tubes must be strictly adhered to for a satisfactory soldering.

The object of the invention is to eliminate the above-mentioned disadvantages and in particular to enable a simple, problem-free and quick installation of a connecting pipe connected to a collecting vessel or a collecting pipe.
The object was to provide a method for manufacturing a pipe distribution device of the type mentioned at the outset.

This object is achieved according to the invention in a method of the type mentioned at the outset, in which: (a) the connecting parts are connected to each other by a material bond in the longitudinal direction of the container to form a closed cylindrical or rectangular container circumferential wall; (b) forming a notch for the matrix hollow profile in the longitudinal direction on the surface of the connecting member, and (c) increasing the rigidity of the material side before joining them to the connecting member. and/or for thermal expansion adaptation by additionally providing mating matching cutouts, which are locally distributed according to the usage criteria.

According to one embodiment of the method according to the invention, after the tube group has been set and the preformed connection piece has subsequently been fitted, the joint is sealed fluid-tightly, preferably material-bondingly. is advantageous. This results in a stable structure of the wall of the collecting container or tube in layers.

According to a further embodiment of the invention, it is also possible to arrange all tube banks and preforms and only then seal all joints in a liquid-tight manner. With this method, the structure of the tube distribution device can first be assembled and, if necessary, repositioned. Only then can the individual parts be irreleasably joined in a fluid-tight and immovable manner by suitable bonding methods. It is therefore clear that only one joining step is required when producing just one pipe distribution system, which makes the production even simpler.

The preforming of the individual ring-shaped elements is preferably carried out in a suitable manner in such a way that the two elements are placed one on top of the other, thereby creating through openings for the individual tubes. Each individual molding thus has an open cross-section with a cutout or recess that corresponds to the outer diameter shape of the tube. Suitable precision forming methods are, for example, coining, stamping, rolling.

Optionally, another method for preforming the part,
Especially mechanical processing methods such as planing, milling,
Grinding can also be used. Erosion methods are also encompassed by the present invention.

The connecting element can advantageously be provided with webs, projections, positioning or alignment surface structures. Further, a surface structure suitable for bonding technology may be formed.

According to the invention, the part is provided with a rear cutout, in particular external to the molding surface. Such a notch forms a region of matched stiffness and/or coefficient of thermal expansion after the parts are joined.

Such cutouts may be made in the area surrounding the tube group of the member or also in the member in order to adapt the structural rigidity of the collecting vessel formed from the member to the operating load requirements, either globally or locally. It can be provided outside this area.

The joining of the preformed parts and the joining of materials in constructing the structural group can be carried out in a wide variety of ways. In particular, the liquid-tight joining of the parts is carried out by pressure welding with or without filler metal. For this purpose, the surface molding may be effective for positioning, and the molding also favorably affects the progress of welding during electric resistance welding. The individual tubes can also be held in position by means of a preforming element by means of a clamping action prior to the fluid-tight connection of the individual elements.

Other bonding methods are diffusion bonding or soldering.

In order to arrange the individual tube groups in the desired stable manner, it may be advantageous to use additional spacers in the region of one end of the tube groups or at a distance therefrom. For this purpose, the spacer should be constructed in such a way that the two parallel tube groups are separated by a certain distance.

The arrangement of the individual tube groups, preformed parts and optionally spacers can be carried out automatically, and also the liquid-tight connection process of the individual tube groups and the preformed parts. This makes the manufacturing process of the pipe distribution system even simpler and cheaper.

A pipe distribution device manufactured based on the method of the present invention,
In particular, the heat exchanger assembly device is characterized in that the walls of the assembly vessel or the tubes are formed by a ring-shaped member which surrounds the tube end cross-section and the tube ends of the tube group and has a pre-opening section, in which case the joining points are is characterized by being liquid-tightly sealed.

According to the invention, therefore, the arranged ends of the tubes are fitted to the bottom of the collecting container or tube in such a way that the structure is completed by joining strips or ring-shaped elements in layers, with the The tubes belonging to each layer are fitted simultaneously in the respective next step. This results in a substantially closed-walled container. The connection points are fixed fluid-tightly and immovably in each section or after the complete pipe distribution system has been assembled. According to the invention, the complicated individual assembly and fitting of tubes as in the state of the art can be overcome, since the preform of each part has an open cutout or This is because it has a recess, while the preform of the next component surrounds the previously placed tube group for the first time. The layers may be perpendicular to the extension of the collecting vessel or may also form an oblique angle.
Advantageously, the absorption of forces from internal pressure and temperature takes place in the direction of extension of the layer. Depending on the respective shape, ie whether the curved outer wall surface of the collecting pipe is flat or curved, the strips or elements can absorb bending loads and/or tangential forces.

The invention will now be explained in detail with reference to the illustrated embodiments.

The collecting vessel wall shown schematically in FIG. 1 has an approximately horizontally extending connecting strip 10, which strip 10 is either circular, as shown in the embodiment of FIG. 2, or circular, as in the embodiment of FIG. It may have a substantially rectangular configuration as shown in FIG.

The connecting strip 10 has a preformed notch along its upper side, into which a first generally horizontally extending first groove is provided.
At the same time, the tube ends of tube group 1 are fitted from above. After the first tube group 1 has been fitted, a first preformed part 5, which is also circular in accordance with the diameter of the connecting piece 10, is fitted over it.

Continuing, in the same way, tube groups 2, 2', 3,
3' and 4, each time tube group 2,
Before fitting 2', 3, 3' and 4, preformed circular members 5, 6, 7, 8 and 9 are placed. It is clear that this results in a substantially closed inner wall of the collecting container. The joints between tubes and components are likewise fluid-tightly and immovably fixed, for example by pressure welding, diffusion welding or soldering with or without filler metal.

The joining of the structures can therefore be carried out in packaged fashion and can be automated, in which case spacers can be inserted between the layers in a similar manner if necessary.

2 and 3, a collecting vessel or tube 21 is shown in a schematic plan view during manufacture. The wall 20 of the collecting container 21 is circular in the embodiment of FIG.
In the illustrated embodiment, it is rectangular.

The inner wall of the collection vessel shown in the embodiment of FIG. 4 corresponds approximately to the construction of the wall of FIG. However, in addition, a rear cutout 11 is provided on the outside of the original preform of the part for receiving the individual tubes of the tube group, which creates an area of moderate stiffness and nevertheless A closed collecting vessel inner wall is created.
The rear cutout 11 is shown in most detail in FIG.

The individual preformed parts may be arranged with different cross-sections in order to create optimal joining locations between the attachment parts.

As shown in FIG. 6, the joint points may be individually assisted by positioning surface structures 13.

For the connection of the pipe 2' and the preformed part 6 shown in FIG. The tube 2' is securely positioned in the preformed recess of the part 6, after which the part 7 is fitted from above. In this way, damage to the formed tube 2' due to squeezing between the partial joints 26 is avoided. Nosed guide strip 16 or corresponding guide strip 17 of part 7
The contours of are evident from the cross-sectional views of FIGS. 8 and 9. The end edge 36 of the nose-shaped guide strip 16 is spherically or conically shaped so that it can be fitted into a preformed recess in the part 6 by a snap action after passing through the molded tube 2'. It's okay.

[Brief explanation of the drawing]

FIG. 1 is a side view of the layered collecting vessel wall with the connecting tube pieces as seen from the inside of the collecting vessel; FIG. A schematic plan view of the shaped collection container, FIG. 3 corresponds to FIG. 2 of a half-finished collection container with approximately rectangular cross section, and FIG. A side view corresponding to FIG. 1 in which the preform part has an additional cutout on the outside of its preform, FIG. 5 a plan view of the part according to FIG. 4, and FIG. Figure 7 shows an example of cross-sectional forming of successive pre-formed parts for positioning; FIG. 8 is a cross-sectional view of two assembled members with selective joining and positioning devices between
A sectional view taken along the - line in the figure, and FIG. 9 is a sectional view taken along the - line in FIG. 7. 1, 2, 3, 4...tube group, 5, 6, 7, 8, 9
... Connection member, 11 ... Rear notch, 12, 1
3, 16, 17... Surface structure, 20... Wall of collecting container or pipe, 21... collecting container or pipe.

Claims (1)

Claims: 1. A matrix hollow profile held in a wall structure joined in layers on the end side, in which case each of the layers can be joined along opposite surfaces; 2.
It consists of two connecting parts, which, before their joining, are provided with recesses for the matrix hollow profiles that are open on one side facing each other, in which the ends of the matrix hollow profiles are inserted, respectively, after joining. In the method of manufacturing a pipe distribution device for a heat exchanger of the type in which two adjacent rows of profiles are embedded in a spatially shifted and interlocking manner, (a) the connecting members 9, 5 are closed; manufactured using ring-shaped members that are interconnected by material bonding in the longitudinal direction of the container to form the peripheral wall of a cylindrical or rectangular container, (b) connecting cutouts for matrix hollow profiles in the longitudinal direction; (c) before joining the connecting members 9, 5,
For stiffness and/or thermal expansion adaptation on the material side,
Additionally, mating matching cutouts 11 are provided, which are locally distributed according to the usage criteria. A method for manufacturing a pipe distribution device characterized by the following. 2 One pipe group 1, 2, 3 or 4 and the next one
after installing the two preformed connecting elements 5, 6, 7, 8 or 9, sealing the joint in a liquid-tight manner;
A manufacturing method according to claim 1. 3. Place all tube groups and preformed connecting members and subsequently seal all joints in a liquid-tight manner;
A manufacturing method according to claim 1. 4. The manufacturing method according to any one of claims 1 to 3, wherein the connecting member is preformed by secondary molding to correspond to the cross-sectional shape of the half of the attached tube. 5. The manufacturing method according to any one of claims 1 to 3, wherein the connecting member is preformed according to the cross-sectional shape of the half of the attached tube by a cutting method. 6. Process according to any one of claims 1 to 3, characterized in that the connecting part is preformed by means of an erosive process in accordance with the cross-sectional shape of the associated tube half. 7. A manufacturing method according to any one of claims 1 to 6, characterized in that webs, protrusions, positioning or alignment surface structures 12, 13 are introduced into the preforming step of the connecting member. 8 Liquid-tight joining of the parts is carried out by pressure welding, diffusion bonding or brazing with or without filler metal;
A manufacturing method according to any one of claims 1 to 7. 9. Any one of claims 1 to 8, wherein the spacer is arranged between two groups of tubes in the region of one tube end or at a distance from one tube end.
Manufacturing method described in section.