JPH0619983Y2 - Plate heat exchanger - Google Patents

Description

TECHNICAL FIELD The present invention relates to a plate heat exchanger used for heat exchange of liquid or vaporized fluid in various industries such as chemical, power, metallurgy and food industries. Is.

2. Description of the Related Art Generally, a plate heat exchanger has a structure as shown in FIG.
Alternate heat transfer plates (1) through gaskets (2)
A plurality of medium passages are formed between the adjacent heat transfer plates by reversing them by 180 °, and a plurality of medium passages are formed between the adjacent heat transfer plates. It is configured to exchange heat via a heat plate.

FIG. 4 is a partial cross-sectional view of the gasket mounting portion in the plate heat exchanger, showing the gasket (2) fitted in the gasket groove (3) formed in the peripheral portion of the heat transfer plate (1). The sealability is maintained by pressing the bottom surface of the gasket groove (3) of the heat transfer plate (1) opposite thereto.

By the way, conventionally, a mounting method using an adhesive for mounting the gasket (2) on the heat transfer plate (1) is well known. However, in this mounting method, it is necessary to wash the heat transfer plate (1) to remove non-adherent substances such as oil and fat before applying the adhesive, and it takes time to apply the adhesive and dry cure. Furthermore, when the gasket (2) must be replaced due to leakage or the like after being used for a considerable period of time, it is necessary to remove the gasket (2) and the adhesive from the gasket groove (3) for maintenance. Workability is not good. Further, when treating a liquid for food, a slight amount of coloring and odor due to the adhesive may cause problems. Therefore,
It is desired to mount the gasket (2) on the heat transfer plate (1) without using an adhesive.

FIG. 5 exemplifies a method of mounting the gasket (2) on the heat transfer plate (1) by fitting without using an adhesive. The gasket groove (3) of the heat transfer plate (1) is formed in a trapezoidal shape. In addition, the gasket (2) is formed into a cross-sectional shape that is substantially the same as the above-mentioned gasket groove (3), and the elasticity of the gasket (2) is used to press fit into the gasket groove (3) to transfer heat. It is attached to the plate (1).

However, with the above structure, the pushing force of the gasket (2) into the gasket groove (3) is large, and it is difficult to remove the gasket (2) from the gasket groove (3) when removing the gasket. There were inconveniences such as poor workability.

Therefore, various kinds of mounting methods shown in FIGS. 6 to 10 have been proposed to improve the problems of the mounting method by the above-mentioned fitting. First, the gasket (2) shown in FIGS. 6 to 8 is mounted on the heat transfer plate (1) by integrally forming the protruding pieces (4) on the outer peripheral side surface of the gasket (2) at appropriate intervals. The protrusion (5) integrally formed on the lower surface of the piece (4) is press-fitted into the fitting hole (6) provided in the heat transfer plate (1) in correspondence therewith to transfer heat to the gasket (2). It is attached to the plate (1). Next, the gasket (2) shown in FIG. 9 is mounted on the heat transfer plate (1) by correspondingly forming projections (5) integrally formed on the lower surface of the gasket (2) at appropriate intervals. The gasket (2) is attached to the heat transfer plate (1) by fitting into the fitting hole (6) provided in the bottom of the gasket groove (3) of (1). Further, the gasket (2) shown in FIG. 10 is attached to the heat transfer plate (1) by correspondingly forming projections (5) integrally formed on the outer peripheral side surface of the gasket (2) at appropriate intervals. The gasket (2) is attached to the heat transfer plate (1) by fitting into the fitting hole (6) provided in the outer peripheral side wall of the gasket groove (3) of (1).

Problems to be Solved by the Invention By the way, each of the above mounting methods has the following problems.
First, in any mounting method other than that shown in FIG. 5, when the gasket (2) is mounted on the heat transfer plate (1), the fitting hole (6) provided on the heat transfer plate (1) by the gasket (2) to be mounted. It is difficult to confirm the position of from the mounting side, and therefore, it takes time and effort to mount the gasket (2) on the heat transfer plate (1), and a portion where the mounting is insufficient is likely to occur. Next, in any mounting method other than that shown in FIG. 5, the fitting hole (6) provided in the heat transfer plate (1) is processed by utilizing the flat surface portion or the sloped surface portion of the plate molding.
Large diameters cannot be processed, resulting in smaller diameters. Therefore, since the fitting force between the protrusion (5) and the fitting hole (6) is weak, it is necessary to provide a large number of protrusions (5) and fitting holes (6).
Moreover, since the projection (5) has a small diameter, it can be easily cut when it is attached or removed. Further, except for the mounting method shown in FIGS. 5, 9, and 10, when the gasket (2) is compressed by tightening the heat transfer plate (1), the amount of compression deformation tends to move in the direction of the arrow in the drawing. Therefore, the protrusion (5) of the gasket (2) which is press-fitted into the fitting hole (6) of the heat transfer plate (1) is damaged by lateral shearing force, or the protrusion of the gasket (2) is caused. When the gasket (2) is attached to the heat transfer plate (1) again due to permanent deformation elongation of the piece (4), the work becomes difficult. In addition, except for the mounting method shown in FIGS. 5, 9 and 10, the gasket (2) and the protrusion (5) are connected by the protruding piece (4) so that there is a distance. ) Is weakly attached to the heat transfer plate (1). As a result, the gasket (2) is displaced and the stability of the seal is lost. In addition, the mounting method shown in FIG.
Since the fitting hole (6) is provided at the groove bottom of the gasket groove (3) of the heat transfer plate (1), there is a problem in the sealing property of the gasket (2). Therefore, it is necessary to design the width of the gasket (2) to be large in order to improve the sealing property, and therefore, there is a problem that the strength of the heat transfer plate (1) is reduced and the volume of the gasket (2) is increased to increase the cost. Furthermore, in the mounting method shown in FIG. 10, since the fitting hole (6) is provided in the side wall of the gasket groove (3), when the gasket (2) is mounted, the gasket (2) is twisted to transfer heat. The gasket (2) must be inserted into the fitting hole (6) of the plate (1), and the gasket (2) must be twisted when removing the gasket (2). For this reason, it is very difficult to mount and remove the gasket (2), and similar to the mounting method shown in FIGS. 6 to 8, there is a problem that the protrusion (5) is damaged during the mounting and removal. is there. Further, as a processing method for providing the fitting hole (6) on the side wall of the gasket groove (3) of the heat transfer plate (1), a method of forming the fitting hole (6) before press molding and a method of fitting after the press molding. There is a method of drilling the dowel (6), but it is difficult to make the position and size and shape of the hole constant in the former, and in the latter, the mold for punching diagonal holes has a complicated structure and is expensive. There was a problem.

An object of the present invention is to provide a plate heat exchanger that solves the above-mentioned problems found in known plate heat exchangers.

Means for Solving the Problems In order to achieve the above object, the present invention provides a gasket in which a plurality of heat transfer plates are attached and fixed in a gasket groove provided around the entire periphery of the heat transfer plate without using an adhesive. In the plate-type heat exchanger laminated via the above, a three-dimensional fitting slit orthogonal to the gasket groove is cut out at a required position from the outer peripheral side wall of the gasket groove of the heat transfer plate to the outer edge portion. In addition to the provision of a protrusion piece integrally provided on the outer peripheral side surface of the gasket, the protrusion piece facing the fitting slit of the heat transfer plate and press-fitted thereinto, and the protrusion piece of the gasket in the fitting slit of the heat transfer plate. By press-fitting and fitting, the gasket is mounted and fixed in the gasket groove of the heat transfer plate.

Effect According to the present invention, a three-dimensional fitting slit is provided from the outer peripheral side wall of the gasket groove to the outer edge portion, and the protruding piece integrally formed with the gasket is press-fitted into the three-dimensional fitting slit to thereby form a gasket. Since it is attached and fixed to the heat transfer plate, the gasket can be attached and fixed to the heat transfer plate without using an adhesive, and the fitting part can be easily confirmed when attaching and fixing the gasket. A three-dimensional fitting structure in which substantially the entire protruding piece is fixed by the three-dimensional fitting slit is obtained.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, reference numeral (10) denotes a heat transfer plate, which is provided with a gasket groove (11) over the entire circumference thereof, and which is provided with a gasket groove (11) at an appropriate interval from the outer peripheral side wall of the gasket groove (11) to the outer edge portion. A three-dimensional fitting slit (12) orthogonal to each other is formed as a notch. (13) is a gasket made of an elastic material such as synthetic rubber fitted in the gasket groove (11) of the heat transfer plate (10), and has a fitting slit (12) of the heat transfer plate (10) on the outer peripheral surface. Correspondingly, a protruding piece (14) which is press-fitted into the fitting slit (12) is integrally formed.

As shown in FIG. 1 (A), the gasket (13) is mounted in the gasket groove (11) of the heat transfer plate (10), and
The protrusion piece (14) is press-fitted into the fitting slit (12) to be mounted on the heat transfer plate (10).

In the plate heat exchanger, when the gasket (13) is attached to the heat transfer plate (10), the heat transfer plate (10)
Since the fitting slit (12) provided from the outer peripheral side wall of the gasket groove (12) to the outer edge portion can be confirmed from the mounting side, the mounting is very easy. Also, gasket (13)
The protrusion piece (14) provided on the outer peripheral side surface of the heat transfer plate (10) is press-fitted into the three-dimensional fitting slit (12) provided from the outer peripheral side wall of the gasket groove (11) to the outer edge portion. As a result, strong mounting can be obtained. That is, the fitting hole (6) and the gasket (2) of the conventional heat transfer plate (1) shown in FIG. 6 to FIG.
In this invention, the fitting slit (12) of the heat transfer plate (10) and the protruding portion (14) of the gasket (13) can be fitted in a larger area than the fitting area of the protrusion (5) of the present invention. A good fit is obtained. Furthermore, since the gasket groove (11) has a three-dimensional fitting structure from the outer peripheral side wall to the outer edge, the gasket groove (11)
From the fitting slit (12) fitting on the outer peripheral side wall to the fitting slit (12) fitting on the outer edge, the protruding piece ( Since substantially the entire portion 14) is fixed, a stronger gasket 13 can be mounted as compared with the conventional fixing of the protrusion 5 of the gasket 2 on one surface.

Further, in this invention, the gasket (1) is attached to the outer peripheral side wall of the gasket groove (11) of the heat transfer plate (10) which is in contact with the gasket (13).
Since the protruding piece (14) of 3) is fitted in the fitting slit (12) and the gasket (13) is mounted on the heat transfer plate 10, there is no distance between the gasket (13) and the fitting portion, Gasket (13)
It is possible to obtain a strong attachment that prevents the heat transfer plate (10) of the main body from rising from the gasket groove (11).

Even if the heat transfer plate (10) is tightened to compress the gasket (13), the protruding piece (14) of the gasket (13) is free in the moving direction due to compression, so permanent deformation elongation occurs. Can also be reset to the heat transfer plate (10) on the gasket (13). Further, since the shape of the protruding piece (14) of the gasket (13) can be made large, the protruding piece (14) of the gasket (13) can be fitted with the fitting slit () of the heat transfer plate (10) without using a tool or the like. It can be easily press-fitted into the heat transfer plate (12), and the gasket (13) can be easily removed by pushing up the protruding piece (14) from the back surface of the heat transfer plate (10) with fingers.
The workability of mounting / removing can be improved.

FIG. 2 shows another embodiment of the present invention in which the outer peripheral side wall of the gasket groove (11) of the heat transfer plate (10) and the upper surface of the outer edge portion (15) which is an extension thereof are notched. A fitting slit (12) is formed by molding, and a protruding piece (14) press-fitted into the fitting slit (12) is provided on the outer peripheral side surface of the gasket (13), and at the upper end of the protruding piece (14). A stopper (16) is provided to facilitate press-fitting of the protruding piece (14) with a finger, etc.
Fit the gasket (13) into the gasket groove (11) of the heat transfer plate (10) and press fit the protruding piece (14) into the fitting slit (12) to fit the gasket (13) to the heat transfer plate (10). ).

Effect of the Invention According to the present invention, the protruding piece integrally formed on the outer peripheral side surface of the gasket is fitted into the three-dimensional fitting slit formed by cutting out from the outer peripheral side wall of the gasket groove of the heat transfer plate to the outer peripheral edge portion. Since the gasket is attached to the heat transfer plate, it is very easy to attach the gasket to the heat transfer plate, and it does not take time and effort.In addition, by pushing the protruding piece up from the back surface of the heat transfer plate, , The gasket can be easily removed, and the fixing force can be increased by press-fitting the protruding piece into the three-dimensional fitting slit for firm mounting, and the protruding piece of the gasket can be three-dimensionally fitted. Fixing force can be increased by press-fitting into the mating slit for firm mounting, and moreover, fixing force can be achieved by press-fitting the gasket protruding piece into the three-dimensional fitting slit. Can be increased for firmer mounting, and can be prevented from rising from the gasket groove of the body of the gasket.
It is possible to prevent a decrease in sealing pressure due to a defective gasket setting, damage to the gasket, and deformation of the heat transfer plate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are drawings showing each embodiment of a plate heat exchanger according to the present invention, (A) is a partial perspective view with a gasket attached, and (B) is FIG. 7 is a partial perspective view before mounting the gasket, and FIG. 6C is a sectional view of a main part when mounting the gasket. FIG. 3 and FIG. 4 are a plan view and a sectional view of an essential part of a heat transfer plate for explaining the configuration of the plate heat exchanger. FIG. 5 to FIG. 10 are cross-sectional views of essential parts showing each conventional method of mounting a gasket. (10) …… Heat transfer plate, (11) …… Gasket groove, (12) …… Mating slit, (13) …… Gasket, (14) …… Projecting piece.

Claims (1)

[Scope of utility model registration request] 1. A plate heat exchanger in which a plurality of heat transfer plates are laminated through a gasket fixedly attached without using an adhesive in a gasket groove provided over the entire circumference of the heat transfer plate, A three-dimensional fitting slit orthogonal to the gasket groove is formed in a notch at a required position from the outer peripheral side wall of the gasket groove of the heat transfer plate to the outer edge portion, and the heat transfer plate is provided on the outer peripheral side surface of the gasket. The projection piece of the heat transfer plate is integrally provided with the projection piece that faces the fitting slit and is press-fitted therein, and the projection piece of the gasket is press-fitted into the fitting slit of the heat transfer plate. A plate heat exchanger characterized by being mounted and fixed in a gasket groove.