Heat exchange – With repair or assembly means – Guide
Patent
1991-10-09
1993-07-13
Flanigan, Allen J.
Heat exchange
With repair or assembly means
Guide
165167, F28F 308
Patent
active
052264734
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a plate heat exchanger having a number of heat transfer plates arranged in a frame comprising two end plates, between which the heat transfer plates are arranged, and two guiding bars. The guiding bars are spaced from each other, extend from one of the end plates to the other are arranged to guide the heat transfer plates.
A plate heat exchanger of this kind is described in GB A 2107845. It has a frame comprising two end plates, a supporting column, an upper carrying bar and a lower guiding bar. The carrying bar and the guiding bar are tightened in the supporting column and at the one end plate. Thus, several different components are required to assemble the frame. The cost for producing these components is relatively high and a long time is required to assemble the frame. In addition, the storage space required for the different components is voluminous.
An object of the present invention is to simplify the construction of the plate heat exchanger and to lower the production cost of the same.
This object can be obtained by a plate heat exchanger of the sort described, which is characterized in that the guiding bars are parts of one and the same rod, which extends in one piece from one of the end plates, past the other end plate and back to the first end plate.
Because the frame of a plate heat exchanger according to the present invention comprises only a few components, namely an integrated carrying and guiding bar two end plates and means for their assembly, assembly the plate heat exchanger becomes very simple. The cost of producing these components and also the cost of the different working operations required to assemble the frame are reduced compared to known practices.
The invention will be described in more detail with reference to the accompanying drawings, in which:
FIG. 1 shows a view of a plate heat exchanger in accordance with the invention,
FIG. 2 shows a view of an integrated carrying and guiding bar included in the plate heat exchanger according to FIG. 1,
FIG. 3 shows a view of an alternative plate heat exchanger in accordance with the invention,
FIG. 4 shows a side view of the plate heat exchanger of FIG. 3,
FIG. 5 shows a view of an alternative assembly of the frame included in the plate heat exchanger according to FIG. 3, and
FIG. 6 shows a view of an alternatively shaped frame.
The plate heat exchanger shown in FIG. 1 comprises a group of several heat transfer plates clamped together by a frame 2. The heat transfer plates 1 are pressed between two end plates 3 and 4, namely an essentially fixed frame plate and a movable pressure plate. For this purpose there are a number of tightening bolts 8 (only shown schematically) between the end plates, which are intended to keep the heat transfer plates together. The frame has a continuous rod 5, which in own piece forms an upper carrying bar and a lower guiding bar, to carry and guide the heat transfer plates 1. The rod 5 extends through the plate heat exchanger perpendicularly from the end plate 3 through the intermediate heat transfer plates and through the other end plate 4. The rod 5 thus extends substantially parallel to the end plates 3 and 4, and then once again through the end plate 4 and heat transfer plates of the heat exchanger to the end plate 3. In the embodiment, whose in FIG. 1 the rod 5 extends through the heat transfer plates 1 but the heat transfer plates 1 may of course only abut the rod 5. A support in shape of a supporting foot 6 is attached tot he rod 5, and another supporting foot 7 is attached to the end plate 3. The rod 5 is fastened in a suitable way (details not shown) to the end plate 3, i.e. The stationary frame plate, and extends freely through the other end plate 4, i.e. The pressure plate.
In FIG. 2 the rod 5 is shown separately. It consist of a bent bar stock having a suitably shaped cross-section, for instance round, depending on how the existing recesses of the heat transfer plates are designed. The rod 5 of the present embodiment is essentially U-shaped one of its legs forming
REFERENCES:
patent: 2621028 (1952-12-01), Newhall
patent: 3448796 (1969-06-01), Usher
patent: 4499942 (1985-02-01), Allison
patent: 5056590 (1991-10-01), Bohn
Jonsson Nils-Ake
Knutsson Roger
Alfa-Laval Thermal AB
Flanigan Allen J.
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