Heat exchange – Flow passages for two confined fluids – Interdigitated plural first and plural second fluid passages
Patent
1986-08-13
1991-07-23
Lazarus, Ira S.
Heat exchange
Flow passages for two confined fluids
Interdigitated plural first and plural second fluid passages
285229, F28F 300
Patent
active
050335430
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a lining for lining inlet ports and outlet ports in a frame plate or a pressure plate for plate heat exchangers and comprising a cylindrical portion and two flanges which are connected to the cylindrical portion and which during the use of the lining are positioned on each side of the frame plate or the pressure plate.
A plate heat exchanger comprises a number of heat exchange plates which are fastened between a frame plate and a pressure plate. In the frame plate and in certain cases also in the pressure plate are made inlet ports and outlet ports for the heat exchanging media. In these inlet ports and outlet ports are usually linings inserted, whereby the frame and the pressure plates do not come into contact with the heat exchange medium which can be corrosive. This means that the frame plates and the pressure plates can be made of a cheap material.
By the international publication Nos. WO 84/00060 and WO 84/01209 are linings previously known which are made of metallic and non-metallic material, respectively. Both these linings have their special advantages like in first hand strength and stability regarding the metal lining and elasticity and simple application regarding the non-metallic lining. The linings, however, are also impaired by certain drawbacks like a relatively high cost regarding the metal lining and in certain cases unsufficient strength and stability regarding the non-metallic lining.
This invention aims to join the advantages of the metallic lining and the non-metallic lining. This is made possible by a lining of the kind mentioned by way of introduction, which is characterized in that the lining comprises a rigid part having a cylindrical portion and a flange being integral with this portion, and that the remaining part of the lining is made of an elastic material.
By this design of the lining a product is created which is cheap to manufacture, easy to apply and has sufficient stability and strength.
Some preferred embodiments of the invention shall be described in more detail with reference to the accompanying drawings, in which
FIG. 1 shows a first embodiment of the lining comprising an elastic portion and a metallic plate, half the figure showing a cross-section through the lining,
FIG. 2a is a plan view of the metal plate shown FIG. 1,
FIG. 2b is a cross-section through the metal plate according to FIG. 2a,
FIG. 3a is a planview of a modified metal plate,
FIG. 3b is a cross-section through the metal plate according to FIG. 3a,
FIG. 4 is a cross-section through a divided lining according to a second embodiment,
FIG. 5 is a cross-section through a divided lining according to a third embodiment, and
FIG. 6 is a cross-section through a divided lining according to a fourth embodiment.
FIG. 7 is a view of the embodiment of FIG. 1 showing the combination of a plate heat exchanger and the lining.
Referring to FIG. 1 is there shown a first embodiment of the lining. The lining comprises a cylindrical portion 1 of an elastic material, preferably rubber and two flanges 2 and 3. One 2 of the flanges is made in one piece with the cylinder 1 and accordingly consists of rubber. This flange 2 is intended to rest against a connecting tube flange. The second flange 3 is intended to rest against a heat exchange plate and is made of a rigid material, preferably a thin stainless steel plate. Other metallic material can be titanium or Hastalloy. The flange 3 is fastened to the cylindrical rubber portion 1 preferably by means of vulcanization. The flange 3 shown more closely in FIG. 2 comprises a round plate 4 provided with a hole 5 for the medium that is to be heat exchanged. Furthermore a little, cylindrical portion 6 is an integral part of the flange 3 and is embedded into the rubber cylinder. The flange 3 is so thin that it can be put between the frame plate or the pressure plate and an adjacent heat exchange plate without machining of the frame plate or the pressure plate at the area for the inlet ports and outlet ports. In this connection the heat exchange plates are so ori
REFERENCES:
patent: 3580616 (1971-05-01), Merkwacz
Jonsson Nils-Ake
Nilsson Bo G.
Alfa-Laval Thermal AB
Lazarus Ira S.
Neils Peggy A.
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