JPH0412398B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plate heat exchanger, and in particular to a frame plate and/or a pressure plate of a plate heat exchanger having at least one through hole for a heat exchange medium.

A plate heat exchanger consists of two end plates, a frame plate and a pressure plate, and a stack of heat exchange plates intermediate the two end plates.

At least the frame plate is provided with holes or ports for connecting the heat exchange medium to a pipeline passing through the heat exchanger. There are generally four interconnecting holes, an inlet port and an outlet port for each of the two media.

When using frame plates and/or pressure plates, the small spacing between these inlet and outlet ports poses a problem in the connection of pipelines. These problems are to some extent due to the fact that the flanges for coupling are provided too close to each other or even facing each other, and to some extent the flanges for coupling are too close to the support and guide bars. This is due to the fact that

Traditionally, these problems have been addressed to some extent by the use of different lengths of connecting pipes for frame plates and/or pressure plates, and to some extent by the use of bent pipes for connecting pipes of frame plates and/or pressure plates. It was resolved by this. Their cost becomes increasingly high as the connecting members are made of expensive alloys such as stainless steel, titanium, etc. Furthermore, since the connecting members are based on the specifications of the pressure vessel, the costs of their application are therefore higher.

The invention provides an answer to these problems, according to the invention the frame plate and/or the pressure plate of the plate heat exchanger having at least one through hole for the heat exchange medium; has a straight center line C ₁ and circular openings on both sides of the plate, and the center line C ₁
is characterized in that it forms an angle other than 90° with the plane P of the plate, and the inner wall of the through hole has a generatrix that surrounds at least a part of the periphery of the through hole and is inclined to the plane of the plate.

Occasionally, a customer desires a connection port size that does not match the heat exchanger design criteria, but rather matches the size of the port openings in the plates of the plate package. Such customer's wishes may be smaller or larger than the standard. Today, such requirements are often met by placing expensive external spacing members tapered in either direction between the frame plate or pressure plate and the flange of the connecting pipeline. . The present invention also provides another solution to the problem of satisfying these requirements by providing through holes of different dimensions on both sides of the frame plate or pressure plate.

A better understanding of the invention will be gained from the following description of some embodiments and with reference to the accompanying drawings.

FIG. 1 shows a connection port between a frame plate or pressure plate and a pipeline connected to the plate by means of a fixing member.

Figure 2 shows an assembly very similar to Figure 1, but
The connection port is provided with a separate lining.

FIG. 3 shows a frame plate or pressure plate according to the invention.

FIG. 4 shows another assembly similar to that of FIG. 1, but not in accordance with the invention.

FIG. 1 shows a frame plate or pressure plate 1 with a flange 3 attached to the plate 1 by several bolts 2. As shown in FIG. The purpose of the flange 3 is to fix the connecting pipe 4 with the flange 5 to the plate 1. For this purpose, the bolt 2 is tightened by a nut 6.

The through holes 7 in the plate 1 respectively draw in and discharge at least one type of heat exchange medium. Wall surface of each through hole 7 and central axis C ₁
makes an angle other than 90° with the plane P of the plate 1. Therefore, as shown in FIG.
The generatrix at the longitudinal edge 8 of makes an acute angle with the longitudinal edge 10 of the inner surface of the plate 1;
At the same time, the generatrix at the further longitudinal edge 9 of the through-hole 7 also forms an acute angle with the further longitudinal edge 11 on the outer side of the plate. Due to this configuration, the openings of the through holes 7 on the outer surface of the plate 1 are positioned further outward in the circumferential direction of the plate 1 than the openings on the inner surface, and therefore the through holes on the outer surface 12 of the plate The distance between them will be greater than at the inner surface 13 of the plate.

According to this embodiment, the cross section of the through hole in the outer surface 12 of the plate 1 is the same as that of the inner surface 13 of the plate 1.
It is desirable that it be circular and the same size as the one in .

The lining 14 in the through-hole 7 is inserted, in this case made of sheet steel. Instead of a metal lining, a lining made of rubber or plastic material is also possible. According to the embodiment shown, the lining 14 has a flange 15 mounted between the plate 1 and the flange 5 of the connecting pipe 4. On the inner side 13 of the plate 1 there is a relief groove 16 in which a ring 17, preferably made of steel, is fitted in a circular manner. This steel ring 17 has a lining 14 in one part and a plate 1 in another part.
A gasket 18 is fixed therein which acts as a seal between the adjacent heat exchanger plates 19.

FIG. 2 shows an assembly of essentially the same design as that of FIG. 1, but with a lining 20 of a different design. This lining 20 is made of rubber in one piece and includes a portion 21 corresponding to the gasket 18 and the steel ring 17, which are made separately in FIG. In order to prevent the rubber flange 22 from being crushed between the plate 23 and the flange 24 of the connecting pipe 25, a distance element 26, preferably made of steel, is placed in the rubber flange 22. There is.

Such a through hole structure of the present invention can be utilized with different types of corrosion resistant linings as well as plates with full surface non-corrosion resistant ports.

FIG. 3 shows a frame plate or pressure plate 30 according to the invention. This plate 30 has four through holes 31 and 3 for connection.
2, 33, and 34, the central axis of each of which makes an angle other than 90° with the plane of the plate.

Autogenous cutting is more preferably used when making the through holes in the plate. The gas flame is directed at an angle to the plate and moved in a circular path. As a result, circular openings are obtained in the surfaces 10 and 11 of the frame plate and/or pressure plate, the cross section perpendicular to the central axis being elliptical.

FIG. 4 is a schematic cross-sectional view of another assembly, but not the embodiment of the invention as shown. The frame plate or pressure plate 40 has a through hole 41, and as shown, the generatrix at one longitudinal edge 42 of the hole 41 forms an acute angle with a longitudinal edge 43 on the inner surface of the plate 40, and The generating line at the opposite longitudinal edge 44 of the hole also forms an acute angle with the longitudinal edge 43 of the opposite longitudinal edge 44 of the hole. is forming. As a variation of this, the longitudinal edge 4
4 can also form a right angle to the longitudinal edge of the plate, in which case the axis of the hole
C ₂ is inclined at an angle other than 90° to the plane of the plate.

A metal lining or a rubber lining 45 is preferably inserted into the through hole 41 of the plate.

The construction described in connection with FIG. 4 is particularly useful when it is desired to meet requirements regarding the dimensions of the connection and the velocity of the heat exchange medium in the connection pipe that deviate from the specifications corresponding to the dimensions of the ports in the plate package. Probably.

The above examples can be applied to any of the frame plates and/or pressure plates, or to all ports, not just any of the ports.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a connection port between a frame plate or pressure plate and a pipeline connected to the plate by a fixing member. FIG. 2 is a cross-sectional view of a connection port with an assembly similar to that of FIG. 1 but with a different liner. FIG. 3 is a cross-sectional view of a frame plate or pressure plate according to the invention. FIG. 4 shows a cross-sectional view of another assembly similar to that of FIG. 1, but not in accordance with the invention. 1... Plate, 7... Through hole, 8, 9... Bus bar, 10, 11... Side surface, C ₁ ... Center line, P...
…Plane.

Claims (1)

Claims: 1. In the frame plate and/or pressure plate of the plate heat exchanger: at least one through hole 7 for the heat exchange medium;
, the through hole has a straight center line C ₁ and circular openings on both sides of the plate, and the through hole has a straight center line C ₁
makes an angle other than 90° with the plane P of the plate,
The frame plate and/or pressure plate of a plate heat exchanger, wherein the inner wall of the through hole has generatrix lines 8 and 9 that surround at least a part of the periphery of the through hole and are inclined with respect to the plane of the plate. 2. The plate type heat exchanger according to claim 1, wherein the openings of the through holes 7 on the outer surface of the plate are closer to the outer edge of the plate than the openings of the through holes on the inner surface of the plate. Exchanger frame plate and or pressure plate. 3. At one peripheral edge of the through hole, the generatrix 8 forms an acute angle with one side surface 10 of the plate 1, and
A frame plate of a plate heat exchanger according to claim 1 or 2, wherein the generatrix 9 makes an acute angle with the other side surface 11 of the plate 1 at the other peripheral edge of the through hole; Or pressure plate. 4. The generatrix of one peripheral edge of the through-hole makes an acute angle with one side surface of the plate, and the generatrix of the other peripheral edge of the through-hole that faces the peripheral edge of the through-hole makes a right angle to the side surface. Frame plate and/or pressure plate of a plate heat exchanger according to any one of paragraphs 1 and 2. 5. Frame plate and/or pressure plate of a plate heat exchanger according to any one of claims 1 to 3, wherein the circular openings on both sides of the plate have the same dimensions.