JPH11311492A - Plate type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel plate type heat exchanger which has a devised fixing means of a gasket with respect to a plate. SOLUTION: In this plate type heat exchanger comprising a number of sheets of plates on which gaskets are mounted and fixed in gasket grooves arranged over the entire circumference of a periphery part without use of any adhesive, a tiny tongue-shaped piece part is provided on the circumferential surface contacting no liquid of a main body part 14 of the gasket, a hook hole 16 art the tip area of the tiny tongue-shaped piece part 11 and a knob piece for extending the hook hole 16 at the outer periphery of the tip area while a pair of key-shaped latch parts 19 and 20 is so arranged to latch an cut rim of the hook hole 16 at a position corresponding to the tiny tongue piece part on the circumferential side having no contact with liquid of the plates with the tips thereof outward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate heat exchanger constructed by stacking plates via a gasket, and more particularly to a plate heat exchanger in which a means for fixing a gasket to a plate is devised. .

[0002]

2. Description of the Related Art There are relatively many processing fields for foods and chemicals which dislike the use of an adhesive for fixing a gasket to a plate. Several fixing methods are also provided and put to practical use. FIG. 7 and FIG.
That is, a fixing tab 2 is integrally provided on a peripheral side surface of the gasket main body 1 where the main part 1 is not in contact with liquid, and a fixing projection 3 is integrally formed on a lower surface of the fixing tab 2.
The gasket fixing insertion recess 5 corresponding to the fixing tab 2 is formed on the peripheral side surface of the fixing recess 3 which is not in contact with the liquid, and the press-fit fitting hole 6 of the fixing protrusion 3 is formed on the bottom surface of the insertion recess 5 corresponding to the fixing protrusion 3.
The gasket main body 1 is attached to the gasket groove 7 of the plate 4 by performing an insertion operation of inserting the fixing tab 2 into the insertion recess 5 and a press-fitting operation of press-fitting the fixing protrusion 3 into the fitting hole 6. There was a format that was fixed.

[0003]

The type described in the prior art described above is such that the fixing tab 2 is inserted into the insertion recess 5 as described above.
The gasket main body 1 is attached and fixed to the gasket groove 7 of the plate 4 by performing an insertion operation of inserting the fixing protrusion 3 and a press-fitting operation of press-fitting the fixing protrusion 3 into the fitting hole 6. There has been a problem that detachment is likely to occur due to receiving an external force in a direction opposite to the insertion direction during the operation and the direction of the press-fit during the press-fitting operation.

[0004] It is an object of the present invention to provide a novel plate heat exchanger in which the above-mentioned problems are solved and other measures are taken.

[0005]

In order to achieve the above object, a plate heat exchanger according to the present invention has a gasket attached and fixed to a gasket groove provided over the entire periphery without using an adhesive. A plate heat exchanger formed by laminating a number of plates, a small tongue-shaped piece on the peripheral side of the gasket main part of the gasket that is not in contact with liquid, and a hook hole at the tip of the small tongue-shaped piece, In addition, a pair of keys are provided on the outer peripheral edge of the front end portion for extending the hook holes, respectively, and hook the cutting edges of the hook holes at positions corresponding to the small tongue-shaped pieces on the peripheral side surface of the plate where the plate is not in contact with the liquid. The mold hooking portion is provided with the tip facing outward.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment shown in FIGS. 1 to 3 has a large number of plates 13 in which a gasket 12 is mounted and fixed without using an adhesive in a gasket groove 11 provided over the entire periphery.
Are laminated to form a plate-type heat exchanger (not shown), wherein a small tongue-shaped piece 15 is provided on a peripheral side surface of the gasket main body 14 where liquid contact is not made, and a tip portion of the small tongue-shaped piece 15 is provided. A rectangular hooking hole 16, and extending knob pieces 17, 18 of the hooking hole 16 at the outer peripheral edge of the tip end, respectively, and the small tongue-like piece 15 on the peripheral side of the plate 13 where the plate 13 is not in contact with the liquid. A pair of key-shaped hooking portions 19 and 20 for hooking the cutting edge of the hooking hole 16 at corresponding positions are provided by being bent so that the tips are directed outward.

[0007] The second embodiment shown in FIGS.
The first embodiment has a configuration substantially the same as that of the first embodiment. However, in the first embodiment, the extension direction of the thumb pieces 17 and 18 is parallel to the gasket main body portion 14, and the second embodiment has a thumb piece. The stretching direction of 17 is orthogonal.

[0008]

In order to mount and fix the gasket 12 in the gasket groove 11 of the plate 13, first, while fitting the gasket main part 14 in the gasket groove 11, one key-shaped hook 1
9 while holding the cut edge of the hooking hole 16 and maintaining the fitted state of the gasket main part 14 and the hooked state of the key-shaped hooking part 19, the pulling knob piece is pulled to make the hooking hole 16 larger (longer). Then, the cutting edge of the hooking hole 16 may be hooked to the other key-shaped hooking portion 20 by releasing the stretching operation, and the mounting and fixing operation may be performed in reverse for the gasket 12 outside.

[0009]

As described above, the plate heat exchanger according to the present invention has a large number of plates on which a gas bridge is fixed without using an adhesive in the gasket grooves provided over the entire peripheral portion as described above. A plate heat exchanger obtained by laminating
A small tongue-shaped piece on the peripheral side of the gasket main body that is not in contact with the liquid, a hooking hole at the tip of the small tongue-shaped piece, and a knob piece for extending the hooking hole at the outer peripheral edge of the tip. A pair of key-type hooking portions are provided, each of which is provided, and a pair of key-type hooking portions for hooking a cutting edge of a hooking hole at a position corresponding to the small tongue-shaped piece portion on the peripheral side surface not in contact with the plate are provided in a state where the tips are directed outward. Therefore, the gasket can be easily and easily attached and detached without using a tool in the same manner as described in the above operation. , So that even if it receives an external force in the direction as described in the above-mentioned conventional example, it is hard to come off and can be firmly stopped.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a first embodiment in a state in which a gasket is attached and fixed.

FIG. 2 is a perspective view showing the gasket in a detached state.

FIG. 3 is a perspective view showing a state in the middle of the mounting and fixing operation.

FIG. 4 is a perspective view of a main part showing the second embodiment in a state in which a gasket is attached and fixed.

FIG. 5 is a perspective view showing a state in which a gasket is removed.

FIG. 6 is a perspective view showing a state in the middle of the mounting and fixing operation.

FIG. 7 is a perspective view of a main part showing a conventional example with a gasket attached and fixed.

FIG. 8 is a perspective view showing the gasket in a detached state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gasket 2 Fixing tab 3 Fixing projection 4 Plate 5 Insertion part 6 Press-fit fitting hole 7 Gasket groove 11 Gasket groove 12 Gasket 13 Plate 14 Gasket main part 15 Small tongue-shaped piece 16 Hook hole 17, 18 Knob piece 19, 20 Key type hook Department

Claims (1)

[Claims] 1. A plate type heat exchanger comprising a plurality of plates on which a gasket is attached and fixed without using an adhesive in a gasket groove provided over the entire periphery of the gasket, wherein the gasket is mainly composed of a gasket. A small tongue-shaped piece on the peripheral side surface of the small tongue-shaped part which is not in contact with liquid, a hooking hole at the tip of the small tongue-shaped piece, and a tab for extending the hooking hole at the outer peripheral edge of the tip. A pair of key-type hooking portions for hooking a cutting edge of a hooking hole at a position corresponding to the small tongue-like piece portion on a peripheral side surface not in contact with the liquid with a tip facing outward. Exchanger.