JP4330678B2 - Plate heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate-type heat exchanger in which a plurality of cassette-structured welding plates that seal a flow path between two plates by welding are stacked via a gasket. It is related with the improvement of the hanger part engaged with the guide bar.
[0002]
[Prior art]
Among various heat exchangers, welded plate heat exchanger is constructed by stacking a plurality welding plate 1 of a cassette structure shown in FIG.
[0003]
The welding plate 1 is made of a rectangular metal plate, has passage holes 2, 3, 4, and 5 serving as fluid inlets and outlets at four corners, and a plate 7 having a heat transfer surface 6 having a corrugated cross section in the middle thereof. Are superposed as a set of two sheets, and are arranged along a welding line W indicated by a dotted line in FIG. 9, that is, in a substantially trapezoidal region where the heat transfer surface 6 and the upper and lower passage holes 2 and 3 communicate with each other. A flow path sealed by a welding line W is formed between the plates 7 by welding by laser welding or the like so as to surround each of the surrounding and upper and lower passage holes 4 and 5.
[0004]
A gasket 8 is attached to the weld plate 1 so as to surround a substantially trapezoidal region where the heat transfer surface 6 and the upper and lower passage holes 4 and 5 communicate with each other. A plurality of passage hole gaskets 9 and 10 are attached so as to surround the periphery of 3 and by laminating a plurality of them, a flow path sealed by the gasket 8 is formed between the welding plates 1 and sealed by the welding line W. The welded plate heat exchanger in which the flow paths and the flow paths sealed by the gasket 8 are alternately formed is configured.
[0005]
[Problems to be solved by the invention]
By the way, as shown in FIG. 8 , the hanger part 11 notched at the center of the upper end engages with the upper guide bar 12 and is suspendedly supported, and the weld plate 1 is notched at the center of the lower end. The hanger portion 13 is positioned by engaging with the lower guide bar 14, and the upper and lower hanger portions 11, 13 slide along the longitudinal direction of the upper and lower guide bars 12, 14 during plate tightening and disassembly. . Therefore, when the tightening / disassembling of the welding plate 1 is repeated many times, the hanger portions 11 and 13 of the welding plate 1 in which the two plates 7 are combined increase the sliding resistance due to the unevenness of the upper and lower guide bars 12 and 14. The hanger parts 11 and 13 of one (first sheet) plate 7 are deformed, and then the hanger parts 11 and 13 of the other (second sheet) plate 7 are deformed. When the deformation of the hanger portions 11 and 13 of the welding plate 1 increases, the positional deviation between the stacked welding plates 1 increases, resulting in a decrease in sealing performance.
[0006]
Such deformation of the hanger portions 11 and 13 of the weld plate 1 is heavier than a conventional single plate because the weld plate 1 has a cassette structure in which the two plates 7 are integrated by welding. The plate 1 integrates the two plates 7 by welding, but the place where the plate 1 is welded is limited to the welding line W that forms a flow path between the two plates 7, and the upper and lower hangers 11, Reference numeral 13 denotes a structure in which two plates 7 are combined, and this is because the strength against deformation in the sliding direction is weak because it is not an integral structure.
[0007]
If the hanger portions 11 and 13 of the welding plate 1 are deformed in this way, the welding plate 1 must be replaced with a new welding plate 1, so that the cost is high and the operation of the heat exchanger must be stopped for a long time.
[0008]
This invention is proposed in view of such a situation, and it aims at preventing the deformation | transformation of a hanger part by the sliding at the time of the fastening of a welding plate or a decomposition | disassembly.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is a plate type heat exchange in which a plurality of cassette-structured welding plates that seal a flow path between two plates by welding are stacked in a standing state via a gasket. In the vessel, a hanger part formed to be attached to the guide bar above and below the welding plate is provided, and the upper hanger part is engaged with the guide bar so that the welding plate is suspended , and the peripheral part of the upper hanger part, Alternatively, the peripheral portion is fixed by means selected from any one of welding, adhesion, brazing, or a combination thereof .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the plate heat exchanger of the present invention shown in FIGS. 1 to 6 will be described below with reference to the drawings. 1 to 6 show the upper hanger portion 11 of the welding plate 1 in the first to sixth embodiments of the plate heat exchanger of the present invention.
[0011]
In the first embodiment shown in FIG. 1, welding is performed by joining the peripheral portion of the hanger portion 11 of the welding plate 1 in a spot shape by a fixing means 15 having high strength such as spot welding or brazing. Two plates 7 of the plate 1 are fixed integrally with a hanger portion 11.
[0012]
In the second embodiment shown in FIG. 2, the peripheral portions of the hanger part 11 of the welding plate 1 are joined in a line by welding 16 so that the two plates 7 of the welding plate 1 are integrated with the hanger part 11. It is stuck.
[0013]
In the third to fifth embodiments shown in FIGS. 3 to 5, the peripheral portion (notch end surface) of the hanger portion 11 of the welding plate 1 is joined by welding 17, 18, 19, so that 2 of the welding plate 1. A single plate 7 is fixed integrally with a hanger portion 11.
[0014]
In the sixth embodiment shown in FIG. 6, the two plates 7 of the welding plate 1 are fixed integrally with the hanger portion 11 by bonding the peripheral portion of the hanger portion 11 of the welding plate 1 with an adhesive 20 or the like. is doing.
[0015]
In the first to sixth embodiments, a means having high strength for fixing the two plates 7 of the welding plate 1 to the peripheral portion or the peripheral portion of the hanger portion 11 of the welding plate 1 is applied. Since the two plates 7 of the welding plate 1 are integrally fixed by the hanger part 11, it is possible to prevent the hanger part 11 of the welding plate 1 from being deformed by sliding with the upper guide bar 12 when the welding plate 1 is tightened or disassembled. . Thus, since the deformation | transformation of the hanger part 11 of the welding plate 1 can be prevented, the position shift between the laminated | stacked welding plates 1 can be avoided, and the fall of sealing performance is avoided.
[0016]
In the above-described embodiment, the upper hanger portion 11 of the welding plate 1 is described. However, the lower hanger portion 13 of the welding plate 1 is also the same as that of the above-described embodiment, and the description thereof is omitted.
[0017]
Further, the present invention is not limited to the size and length of the fixing means shown in the above embodiment, and may be similar to these and combinations thereof.
[0018]
Furthermore, although the illustrated hanger parts 11 and 13 of the welding plate 1 are drawn as a flat plate as a schematic diagram, various types of uneven patterns may be formed.
[0019]
【The invention's effect】
As described above, according to the present invention, the fixing means having high strength at the peripheral part or the peripheral part of the hanger part formed above and below the welding plate in order to attach the welding plate of the cassette structure to the upper and lower guide bars. As a result of this, deformation of the hanger portion of the weld plate due to sliding at the time of tightening or disassembling the weld plate can be prevented, and positional deviation between the stacked weld plates can be avoided to prevent deterioration of the sealing performance. As a result, this is advantageous in terms of cost, and the period for stopping the operation of the heat exchanger can be greatly shortened.
[Brief description of the drawings]
FIG. 1 is a front view of an upper hanger portion of a welding plate in a first embodiment of a plate heat exchanger of the present invention.
FIG. 2 is a front view of an upper hanger portion of a welding plate in a second embodiment of the plate heat exchanger of the present invention.
FIG. 3 is a front view of an upper hanger portion of a weld plate in a third embodiment of the plate heat exchanger of the present invention.
FIG. 4 is a front view of an upper hanger portion of a welding plate in a fourth embodiment of the plate heat exchanger of the present invention.
FIG. 5 is a front view of an upper hanger portion of a weld plate in a fifth embodiment of the plate heat exchanger of the present invention.
FIG. 6 is a front view of an upper hanger portion of a weld plate in a sixth embodiment of the plate heat exchanger of the present invention.
FIG. 7 is a plan view of a welding plate having a cassette structure.
FIG. 8 is an explanatory view showing a suspended support state of a welding plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Welding plate 7 Plate 11 Upper hanger part 12 Upper guide bar 13 Lower hanger part 14 Lower guide bar 15 Adhering means 16, 17, 18, 19 Welding 20 Adhesive

Claims (1)

In a plate-type heat exchanger in which a plurality of cassette-structured welding plates that seal a flow path between two plates by welding are stacked in a standing state via a gasket,
A hanger part formed to be attached to the guide bar above and below the weld plate is provided, and the upper hanger part is engaged with the guide bar so that the weld plate is suspended , and the peripheral part of the upper hanger part or the periphery A plate heat exchanger, wherein the part is fixed by means selected from any one of welding, adhesion, brazing, or a combination thereof .

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