JPS60203329A - Manufacture of multi-plate type heat exchanger - Google Patents

Abstract

PURPOSE:To prevent each member from being shifted at the time of an assembly work, a conveyance, and in the course of a movement in a furnace, etc. by inserting a pin hole provided on each member, through a guide pin provided vertically on an assembly jig, when assembling and forming as one body a housingless type multi-plate type heat exchanger. CONSTITUTION:A pair of guide pins 1a, 1b, and 1c, 1d are provided vertically on both end parts of an assembly jig 1. Each pin hole of reinforcing plates 21, 22 having pin holes 2a, 2b, and 2c, 2d is inserted through pins 1a-1d, respectively and placed on the jig 1. Subsequently, in the same way, brazing foils 31, 32 are inserted through and placed. On this foil, a plate provided with a pair of through-holes on both end parts of a wide wall which has attached an upright wall to the side edge is inserted through and placed in the same way, and also a brazing foil 5 of the same shape as said one is inserted through and placed in the same way. On this foil, a pair of through holes and interval plates 61, 62 with a notch leading to the inside are inserted through and placed in the same way, a fin 63 is placed between both of them, on which the foil 5 is inserted through and placed, and moreover, the plate 41 is accumulated successively in the same way. This assembly body is inserted into a furnace together with the jig 1, and brazed and stuck as one body.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a multi-plate heat exchanger, particularly a so-called housingless type heat exchanger.

A housing-less multi-plate heat exchanger consists of a plate provided with an upstanding wall rising from the edge of the bottom wall, a pair of spaced pieces at both ends of the plate, and plates similar to those described above stacked one after another in sequence. , a multilayered cavity is formed that is separated from the outside and between each layer, and the through holes provided in the plate and the through holes of the spacer plate are made to communicate with each other to form four fluid flow paths.
, B2 fluid is used as an inlet/outlet passage, and cutouts communicating with the cavity are provided in the through holes alternately in each layer, so that the A and B2 fluids enter and exit the cavity every other layer. .

One example is the one disclosed in Japanese Utility Model Application No. 58-148480.

Such a housing-less multi-plate heat exchanger is assembled into a heat exchanger structure by inserting wax foil at the required locations on an assembly jig to form a heat exchanger structure, which is then inserted into a furnace together with the assembly jig. It is then brazed in one direction.

Conventionally, a flat table-shaped assembly jig has been used, which includes the above-mentioned plate, hard solder foil on top of it, a pair of spacing plates and uneven fins if necessary, hard solder foil on top of that plate, and hard solder foil on top of that. The method involved stacking plates on top of each other and placing them one after another in the required number of stages, and since there was no special means for positioning each component, the position of each component was fixed at the tips of the upper and lower upright walls. There was only a fit between the base and the base.

Therefore, during assembly work, when transporting and inserting this heat exchanger structure into the furnace, or when moving the structure in the furnace if the furnace is a continuous type, each member will not be misaligned. This results in an irregularly shaped string V, which causes gaps and incomplete brazing to cause leaks, and the communicating through passages are constricted, resulting in narrowing of the flow passages.

In order to eliminate the above-mentioned problems, the present invention eliminates misalignment of each member by installing guide pins upright on a jig and inserting the guide pins into bottle holes provided in each member to assemble the parts.

To explain by way of an example, a rectangular assembly jig 1 in the figure has a pair of guide bins la, lb and lc, ld erected at both ends thereof, respectively. On the assembly jig 1, a reinforcing plate 21 having pin holes 2a, 2b and a reinforcing plate 22 having a bottle hole 2c12d connect the bottle holes 2a, 2b and 2c, 2d to the guide bottles la, lb, respectively.
It is inserted and placed on lc and 1d. Reinforcement plate 21.22
A hard solder foil 31 having overwritten pin holes 3a, 3b and a hard solder foil 32 having overlapping pin holes 3c13d respectively connect the pin holes 3a, 3b, 3c, 3d to the guide pier 1a.

It is inserted and placed in lb, lc, and ld. On top of that, there are bottle holes 4a, 4b, 4 at the four corners of the rectangular bottom wall 41.
c, 4d, and a through hole 4e, slightly closer to the center thereof.
4f.

4g and 4h, and a plate 4 having standing walls 42 and 43 made by bending the edges of the bottom wall 41, and inserting the bottle holes 4a, 4b, 4c, and 4d into the guide vias 1a.
, 1b11c, and ld respectively, and on top of them are pin holes 5a, 5b, which are approximately the same shape as the bottom wall 41 and are located at the four corners.
5c, 5d and provided with through holes 5e, 5f, 15g, 5h, each of the bottle holes 5a, 5b, 5c,
5d respectively into guide bins la, lb, lc, l
A spacer plate 61 and bottle holes 6c, 6 are inserted into the spacer plate 61 and placed on it, and have pin holes 6a, 6b and through holes 6e, 6f thereon, and a notch 61e that opens the through hole 6e inward.
A spacing plate 62 and a spacing plate 61 having through holes 6g and 6h and a notch 62h that opens the through hole 6h inward.
．． A corrugated fin 63 is placed in the middle of the pin hole 6a.
, 6b, 6c16d to guide bins 1a11b, l
c, ld so as to be inserted through them, and the hard soldering material 5 is placed thereon in the same manner as above, and furthermore, the plates 4 to 1 are placed on top of it in the same manner as above, and the bases of the upright walls 42 and 43 are connected to the corresponding lower stage. The spacer plate 61 above it is fitted with a notch (not shown) that opens inward through the through hole 6 f Ir-, and the spacer plate 6 is fitted onto the edge of the upright wall.
2 is a through hole 6g with a cutout (not shown) that opens inward and placed on the hard solder material 5, and then stacked in the required number of stages by repeating the steps sequentially. Plates 71 and 72 are placed to assemble the heat exchanger structure. In this case, the through holes 4e, 5e, 5- through holes 6e... communicate with each other to form a through path, and (
4f15f, 6f...), (4g, 5g,
6g...), (4h, 5h, 6h...)
The same is true. Next, the heat exchanger structure inserted through the guide bin described above is placed in the furnace together with the assembly jig 1 and brazed together, and after taking out the furnace, the heat exchanger structure is extracted from the guide bin of the assembly jig and the heat exchanger is assembled. obtain.

Since this invention has the above-described configuration, each member is positioned relative to each other by the guide bin and is securely fixed, so that it is easy to assemble, transport for insertion into the furnace, or move during the furnace. Since there is no misalignment of parts, the finished product will not have an irregular shape (misalignment may create gaps and incomplete brazing may cause leaks,
The through-path does not become narrower, and the assembly work becomes extremely easy.

In the above case, the fins provided as necessary are not positioned using guide bins, but are fixed by being clamped between the spacing plates at both ends, or by being held in place by plates or hard solder foil. I can do it.

In addition to the above-mentioned embodiments, we also adopted an assembly method in which the plates are stacked face down with the upright wall facing downwards, and an assembly method in which the reinforcing plate is placed on the top level and the spacing plate without notches is placed on the bottom level. You can also.

[Brief explanation of the drawing]

The figure is a diagram showing the order of assembling members in the manufacturing method of the present invention. 1... Assembly jig 1a, ]b, 1c11d...
・Guide pin 21.22...Reinforcement plate 41...
... Plate 5 ... Hard wax foil 61.62
..... Spacing plate 7 - Procedure Correction n (Year July 1988 Ω, 1988 Patent Application No. 62003 2, Name of invention Method for manufacturing multi-plate heat exchanger 3, Make amendments) Relationship with the case Patent applicant Toshima Kuhigashiikebukuro Address 4-6-3 Higashiikebukuro, Toshima-ku, Tokyo Postal code 17
0. Telephone 03 (984) 3131 June 6, 1982
(Delivery date: June 26, 1981) 5. Subject of amendment: ``Figure 1 is a perspective view showing this invention.'' (2) Add the drawing number ``Figure 1'' to the drawing. (According to the attached red letter)

Claims (1)

[Scope of Claims] On an assembly jig, there is provided a plate having a pair of through holes at each end of a bottom wall with an upright wall on the periphery, and a hard plate having the same shape as the plate on the bottom wall. a pair of spacing plates each having a pair of through holes on both ends of the solder foil and a notch extending inward on one of the through holes, and a pair of spacing plates spanning the pair of spacing plates; A multi-plate heat exchanger structure is assembled by stacking the same hard soldering foil of the same shape as above and the same plate as above on top of the plate in the required number of stages. In the manufacturing method of a multi-plate heat exchanger in which the structure is integrally brazed and fixed by inserting one plate into the plate, a guide bin is erected in the assembly jig, and the bottom wall of the plate, the hard solder foil, and the interval are fixed. 1. A method for manufacturing a multi-plate heat exchanger, which comprises: drilling holes in each plate, and sequentially inserting each hole into the guide bin to assemble the plate. =1=