JP3665391B2 - Plate type heat exchanger gasket mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in the gasket mounting structure of a plate heat exchanger.
[0002]
[Prior art]
As shown in FIG. 2, this seed plate type heat exchanger is formed by laminating a required number of thin plate-shaped heat transfer plates 1 and two kinds of fluid flow paths a and b to be heat-exchanged between the plates 1 and 1. Are formed alternately to allow heat exchange. Around each plate 1, a frame-shaped gasket 2 that hermetically seals and seals the fluid flow path is mounted. In addition, passage holes c, d, e, and f for each fluid are formed at the four corners of each plate 1, and the shape of the gasket 2 is one set for one fluid flow path a. In order to allow the passage with the passage holes c and e, the outer sides of the passage holes c and e are surrounded by an arc, and the passage with the other pair of passage holes d and f is blocked. The entire circumference of the holes d and f and the distributor boundary g are sealed twice, and the flow path b of the other fluid is configured to flow and block the passage holes in the reverse relation to the above. Yes.
[0003]
Conventionally, when the gasket 2 is mounted on the plate 1, as shown in FIGS. 3A to 3E, the adhesive 5 or the double-sided adhesive tape is used to apply to the entire gasket line. It was. In FIG. 3A, a dotted line 3 indicates a conventional adhesive application part.
[0004]
[Problems to be solved by the invention]
In general, the sealing performance of the gasket 2 mounted on the plate 1 depends largely on the elastic force when the gasket 1 is compressed by tightening the plate 1 with a required number of plates 1 stacked as a heat exchanger. As shown in FIG. 3B, the adhesive 5 applied to the gasket groove 1a of the plate 1 is present only at the groove bottom before tightening, but the adhesive 5 is removed by tightening. 3 (C), the gasket 2 spreads to the periphery and adheres the gasket 2 over a wide range, so that the gasket 2 is fixed to the plate 1 while being compressed to some extent by the adhesive 5, and the gasket 2 As a result, the sealing performance of the gasket 2 may be reduced. Further, when pressure is applied in the heat exchanger, the adhesive 5 acts as a lubricant, and the gasket 2 becomes slippery. As a result, the sealing performance of the gasket 2 may also be lowered.
[0005]
Further, when looking at the sealing performance of the heat exchanger, since the gasket 2 is attached to all the plates 1 at the outer peripheral portion 6 as shown in FIG. 3E, the movement in the tightening direction does not occur. As shown in FIG. 3D, the double seal portion 4 is provided with the gasket 2 every other piece, so that the plate 1 is easily deformed with respect to the internal pressure. As described above, when the gasket 2 is fixed with the adhesive 5 and the elastic force is reduced, the sealing action does not follow the deformation of the plate 1 and the internal pressure causes the adhesive 5 to be a lubricant. As a result, the gasket 2 slips and the sealing action is reduced, so that the gasket 2 is easily leaked.
[0006]
The objective of this invention is providing the gasket mounting structure of the plate type heat exchanger which enabled the sealing performance improvement of the double seal part.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention performs heat exchange by laminating a required number of thin heat transfer plates and alternately forming two kinds of fluid flow paths to be heat exchanged between the plates. In addition, a frame-like gasket that surrounds the flow path in an airtight manner is mounted around each plate, and passage holes for the fluids are formed at the four corners of each plate. In order to allow the fluid to flow through the two upper and lower passage holes in one set, the outer sides of the two upper and lower passage holes are enclosed in an arc shape, In order to block the flow between the upper and lower two passage holes, the entire circumference of the two passage holes and the boundary of the distribution section are double-sealed, and the other fluid flow path has an inverse relationship to the above In a plate heat exchanger configured to allow passage holes to be circulated and blocked by Adhesives to each plate using an adhesive, no adhesive is used for the gasket mounting portion corresponding to the double seal portion, and an adhesive is not used for the gasket mounting portion other than the double seal portion. A gasket is attached using
[0008]
By adopting the above configuration, the pressure resistance of the plate heat exchanger is improved by reducing the elastic force when the plate is compressed and the sliding of the gasket against the internal pressure at the double seal part, which is the first weak point in terms of pressure resistance. It leads to
[0009]
DETAILED DESCRIPTION OF THE INVENTION
(A) of FIG. 1 is explanatory drawing of the gasket mounting structure of the plate type heat exchanger which concerns on this invention, (B) is sectional explanatory drawing of a double seal part, (C) is outer peripheral parts other than a double seal part. In order to avoid duplication of explanation, the same reference numerals are used for the same members and the same parts as in the prior art, and the detailed explanation is omitted.
[0010]
In the present invention, as shown in the prior art of FIG. 2, a required number of thin plate heat transfer plates 1 are stacked, and two kinds of fluid flow paths a and b to be heat exchanged between the plates 1 and 1 are alternately arranged. The frame-shaped gasket 2 that hermetically surrounds the flow paths a and b is mounted around each plate 1, and each of the plates 1 has the above-described respective corners. The passage holes c, d, e, and f of the fluids a and b are formed to open, and the shape of the gasket 2 is such that the upper and lower two passage holes c that form one set with respect to the flow path a of one fluid. , E to allow circulation between the upper and lower two passage holes c, e in a circular arc shape, and the flow between the other upper and lower two passage holes d, f is blocked. Therefore, the entire circumference of the two passage holes d and f and the distribution portion boundary g are sealed twice, and the other fluid flow path b is inversely related to the above. In the plate-type heat exchanger configured to allow the passage holes to be circulated and blocked at the same time, when the gasket 2 is bonded to each plate 1 with the adhesive 5, the gasket corresponding to the double seal portion 4 is used. As shown in FIG. 1 (B), the adhesive 5 is not used for the mounting portion, and the gasket mounting portion other than the double seal portion, for example, the outer peripheral portion 6 is shown in FIG. 1 (C). Further, the gasket 2 is mounted using the adhesive 5. In FIGS. 1A, 1B, and 1C, dotted line 3 indicates an adhesive application portion according to the present invention, and reference numeral 1a indicates a gasket groove.
[0011]
Since the present invention has the above-described configuration, the double seal portion 4 which is problematic in terms of pressure resistance does not use the adhesive 5, and in the double seal portion 4, the gasket 2 is bonded to the plate 1 with the adhesive 5. And is held in a state where it can be elastically deformed freely. Accordingly, the elastic force of the gasket 2 when the plate 1 is tightened and the slip of the gasket 2 with respect to the internal pressure, especially the slip with respect to the internal pressure of the gasket 2 that occurs because the adhesive 5 becomes a lubricant, are eliminated, and the plate type heat exchange This leads to an improvement in breakdown voltage as a container.
[0012]
And, since the gasket 2 is mounted on the gasket mounting portion other than the double seal portion 4, for example, the outer peripheral portion 6 using the adhesive 5, even if it is not bonded by the double seal portion 4, Since the gasket 2 is bonded and integrated with the plate 1 at other portions, the gasket 2 is not detached from the plate 1 and is easy to handle and does not hinder the assembly and disassembly of the heat exchanger. In addition, when using the adhesive agent 5 for the outer peripheral part 6, as long as there is no trouble in mounting | wearing of the gasket 2, it is good also as intermittent adhesion | attachment.
[0013]
【The invention's effect】
According to the present invention, in the double seal portion which is a problem in terms of pressure resistance, the elastic force is not reduced when the plate is compressed and the gasket does not slip with respect to the internal pressure, so that the sealing performance can be improved. The pressure resistance of the heat exchanger can be improved.
[Brief description of the drawings]
1A is an explanatory view of a gasket mounting structure of a plate heat exchanger according to the present invention, FIG. 1B is a cross-sectional explanatory view of a double seal portion in the present invention, and FIG. Figure.
FIG. 2 is an exploded perspective view showing a schematic configuration of a conventional plate heat exchanger targeted by the present invention.
3A is an explanatory view of a gasket mounting structure of a conventional plate heat exchanger, and FIG. 3B shows a state before plate tightening (before compression) in a gasket mounting portion of a conventional plate heat exchanger. Cross-sectional explanatory view, (C) is a cross-sectional explanatory view showing the state after the plate is tightened (after compression), (D) is a cross-sectional explanatory view of the gasket mounting portion in the double seal portion of the conventional plate heat exchanger, ( E) Cross-sectional explanatory drawing of the gasket mounting part in the outer peripheral part of the conventional plate type heat exchanger.
[Explanation of symbols]
1 Plate 2 Gasket 3 Adhesive application part 4 Double seal part 5 Adhesive 6 Outer part

Claims (1)

The required number of thin plate heat transfer plates are stacked, and heat exchange is performed by alternately forming two types of fluid flow paths to be heat exchanged between the plates. A frame-like gasket that is hermetically surrounded is attached, and passage holes for the fluids are formed at the four corners of each plate. The shape of the gasket is one for one fluid flow path. In order to allow the flow between the upper and lower two passage holes in the set, the outer sides of the two upper and lower passage holes are enclosed in an arc shape, and the flow between the upper and lower two passage holes in the other set is made. In order to shut off, the entire circumference of the two passage holes and the boundary of the distribution section are sealed twice, and the passage of the passage holes is made to flow and block in the opposite relation to the flow path of the other fluid. In the plate heat exchanger configured in
In adhering the gasket to each plate using an adhesive, no adhesive is used for the gasket mounting portion corresponding to the double seal portion, and an adhesive is applied to the gasket mounting portion other than the double seal portion. Gasket mounting structure for plate heat exchangers, characterized by mounting gaskets using

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