JP3105091B2 - Plate heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate type heat exchanger, and more particularly, to a method of preventing a heat transfer plate from bending or deforming during disassembly and assembly of a large plate type heat exchanger. The present invention relates to a plate heat exchanger that can be prevented.

[0002]

2. Description of the Related Art Generally, as shown in FIGS. 5 to 7, a plate heat exchanger has fluid passage holes (3) at four corners of a heat transfer surface (2) having a corrugated portion (1) having a predetermined uneven pattern. A plurality of heat transfer plates (4) having a rectangular shape and provided with are alternately turned upside down and stacked via a gasket (5), and a bridge is formed between the fixed frame (6) and the support legs (7). Suspended on the guide bars (8) and (9), and tightened between the fixed frame (6) and the movable frame (10) by the tightening bolts (11) and the nuts (12), so that different kinds of fluids flow. The first flow path (13) and the second flow path (14) are formed alternately.

Conventionally, when disassembling and assembling a large plate-type heat exchanger, when carrying the heat transfer plate (4) or suspending it on the guide bars (8) and (9),
When the corrugated portion (1) formed on the heat transfer surface (2) of the heat transfer plate (4) has a sufficiently deep molding depth, rigidity is ensured, and the heat transfer plate (4) is transported by carrying the heat transfer plate (4). The heat plate (4) does not bend or deform. However, depending on the plate-type heat exchanger, the shaping depth of the corrugated portion (1) may be reduced in order to improve the heat transfer performance of the heat transfer plate (4).

[0004]

SUMMARY OF THE INVENTION In a large plate heat exchanger, the heat transfer plate (4) is formed on a heat transfer surface (2) of the heat transfer plate (4) in order to improve the heat transfer performance. When the shaping depth of the corrugated portion (1) is reduced, rigidity is reduced, and the heat transfer plate (4) is carried or used for the guide bars (8) and (9) when disassembling and assembling the plate heat exchanger. If suspended, the heat transfer plate (4) bends or deforms, making handling difficult, and there is a problem that the assembling work cannot be performed smoothly.

The present invention has been proposed in view of the above problems, and has a rigidity that prevents the heat transfer plate from being bent or deformed particularly during disassembly and assembly of a large plate heat exchanger. It aims to provide a high plate type heat exchanger.

[0006]

According to the present invention, a gasket groove is formed between a fixed frame and a movable frame at a periphery of a heat transfer surface having a corrugated portion having a predetermined uneven pattern. In a plate-type heat exchanger in which a plurality of rectangular heat transfer plates are stacked via a gasket removably fitted in the gasket groove, the heat transfer plate is provided on both side edges in a longitudinal direction of the heat transfer plate, and the outer section than the groove, respectively at least one row formed along a bead forming height above forming height of corrugations in the longitudinal direction, the Bee
Heat transfer with beads stacked with the protrusion direction of the beads aligned in the same direction
Heat transfer plate with bead at the end of plate bead projection direction
Between the moving frame and the fixed frame
Is the width between the beads on both sides of the heat transfer plate with beads
Heat transfer plate that is narrower and does not have the beads
Are arranged at least one or more .

Further, the present invention provides a fixed frame and a movable frame.
Heat transfer surface having a corrugated portion with a predetermined uneven pattern
Multiple rectangular transmissions with gasket grooves formed around
The heat plate was removably fitted in the gasket groove.
Plate heat exchanger laminated via gasket
At both longitudinal edges of the heat transfer plate, and
Form a part of the corrugated part that is at least
At least one row of each bead of the shape depth along the longitudinal direction
Formed and laminated with the bead protrusion direction aligned in the same direction
Of the end of the heat transfer plate with
Heat transfer plate with movable frame or fixed frame
Between the beads on both sides of the heat transfer plate with beads
A spacer having a smaller width than the width may be provided.

[0008]

According to the present invention, a bead having a forming depth equal to or greater than a forming depth of a corrugated portion formed on a heat transfer surface is formed on both side edges in a longitudinal direction of a rectangular heat transfer plate and outside a gasket groove. Are formed in at least one line along the longitudinal direction,
Rigidity is improved, and even a heat transfer plate having a corrugated portion with a small forming depth formed on the heat transfer surface, particularly a large heat transfer plate, does not bend or deform during handling.
Moreover, the beads are stacked with the projecting direction of the beads aligned in the same direction.
Of the end of the heat transfer plate with
Heat transfer plate with movable frame or fixed frame
In between, the plate width is on both sides of the heat transfer plate with beads
Hold the bead narrower than the width between the edge beads
At least one or more heat transfer plates
Alternatively, the above width is narrow, instead of a heat transfer plate with beads
The spacer at the end of the stack
Of the bead on both sides of the heat transfer plate with
Keeping the frame or fixed frame out of contact
To prevent a decrease in the pressure resistance of the heat transfer surface.
You.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a plate heat exchanger according to the present invention will be described below with reference to FIGS. The same components as those shown in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

[Embodiment 1] In FIGS. 1 to 3, (2)
1) is a heat transfer plate with a bead having a rectangular shape, and this heat transfer plate (21) has a corrugated portion (22) on the heat transfer surface with a predetermined uneven pattern and a predetermined molding depth d. 23) are formed, and fluid flow holes (24) are formed at the four corners of the heat transfer surface (22). The heat transfer plate (21)
The gasket groove (26) into which the gasket (25) is removably fitted is formed on the peripheral edge, and the gasket groove (26) is formed on both longitudinal edges of the heat transfer plate (21). ), A concave groove (27) having a forming depth D equal to or greater than the forming depth of the corrugated portion (23) is formed along the longitudinal direction, and a substantially cross-section protruding in the same direction as the corrugated portion (23). At least one row of U-shaped beads (28) is provided.
When the beads (28) are formed on both longitudinal edges of the heat transfer plate (21) in this manner, the rigidity of both longitudinal edges of the heat transfer plate (21) is improved, and the heat transfer plate (21) is improved.
Is prevented from being bent or deformed.

The plate type heat exchanger according to the present invention has a plurality of beaded heat transfer plates (2) having the above-described structure in which the gasket (25) is removably fitted in the gasket groove (26).
1) are alternately turned upside down and laminated, and the laminated heat transfer plate with beads (21) is movable between the upper and lower two guide bars (8) and (9) and with the fixed frame (6). It is assembled by tightening between the frame (10) with a tightening bolt (11) and a nut (12).

A heat transfer plate (21) with a bead having the above structure.
Of the heat transfer plate with bead (2) between the beaded heat transfer plate (21) at the end and the movable frame (10).
1) One or more rear heat transfer plates (31) having a narrower width and a corrugated portion (30) having substantially the same configuration as that of the related art and having no bead are laminated and interposed. Thus, the heat transfer plate with bead (31) at the end and the movable frame (10)
When the rear heat transfer plate (31) is interposed between the heat transfer plate and the movable frame (10), the bead (28) of the heat transfer plate with bead (21) and the movable frame (10) are kept in a non-contact state. Since the heat transfer surface (22) of the heat plate (21) contacts the movable frame (10) via the rear heat transfer plate (31), the pressure resistance of the beaded heat transfer plate (21) may be reduced. Absent. The rear heat transfer plate (3)
The number of sheets used in 1) is minimized.

[Embodiment 2] In Embodiment 2 shown in FIG. 4, a heat transfer plate (21) with a bead at the end and a movable frame (1) are provided.
0), a spacer (41) having a bottom thickness is disposed,
Bead (28) of heat transfer plate (21) with end bead
Is prevented from contacting the movable frame (10).

In each of the above embodiments, the bead (28) is projected toward the back surface of the plate. However, the bead (28) may be projected toward the front surface of the plate. is there.

[0015]

According to the present invention, since the beads are formed on both longitudinal edges of the heat transfer plate, even if the shaping depth of the corrugated portion formed on the heat transfer surface is small, the heat transfer plate, particularly, The rigidity of the outer peripheral edge of the heat transfer plate is greatly improved. Therefore, when disassembling and assembling a large plate heat exchanger, when carrying the heat transfer plate or suspending the heat transfer plate from a guide bar, the heat transfer plate does not bend or deform, and the handling is easy. This facilitates the disassembly and assembly of the large-sized plate heat exchanger, which can be performed easily and quickly, thereby improving the workability of disassembly and assembly. The same applies to a small plate heat exchanger.

In the present invention, the projecting directions of the beads are the same.
Bead protrusions of heat transfer plates with beads aligned in the same direction
Heat transfer plate with beads at the end of the exit direction and movable frame or
The plate width is set between the fixed frame and the
Narrower than the width between the beads on both sides of the heat plate, and
At least one heat transfer plate without beads
Either install it on the top or use the heat transfer
By placing spacers instead of rates,
Bead protrusions on both side edges of beaded heat transfer plate at the end of lamination
Outer end and movable frame or fixed frame in non-contact state
To prevent deterioration of the pressure resistance of the heat transfer surface
can do.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a main part of a plate heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a plan view of a heat transfer plate.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a vertical sectional view showing a main part of a plate heat exchanger according to a second embodiment of the present invention.

FIG. 5 is an overall perspective view showing an example of a conventional plate heat exchanger.

FIG. 6 is an exploded perspective view of a main part of FIG. 5;

FIG. 7 is a partial sectional view of a heat transfer plate.

[Explanation of symbols]

 Reference Signs List 21 heat transfer plate 22 heat transfer surface 23 corrugated portion 25 gasket 26 gasket groove 28 bead 31 rear heat transfer plate

Claims (2)

(57) [Claims] Between 1. A fixed frame and the movable frame,
A plurality of rectangular heat transfer plates with gasket grooves formed on the periphery of the heat transfer surface having a corrugated portion with a predetermined uneven pattern,
In a plate-type heat exchanger laminated via a gasket removably fitted in the gasket groove, the corrugated portion is formed on both side edges in the longitudinal direction of the heat transfer plate and outside the gasket groove. respectively at least one row formed along the more bead molding depth in the longitudinal direction, the bi
Bead transmission with the bead protruding direction aligned in the same direction and laminated
Heat transfer plate with bead at the end of bead protrusion direction of heat plate
Between the movable frame and the fixed frame
The width is between the beads on both sides of the heat transfer plate with beads.
Heat transfer play that is narrower than the width and does not have the beads
A plate-type heat exchanger comprising at least one heat exchanger. 2. Between a fixed frame and a movable frame,
Gasket is applied to the periphery of the heat transfer surface having a corrugated
A plurality of rectangular heat transfer plates with
Via a gasket removably fitted in the gasket groove
In the plate type heat exchanger laminated by
On both longitudinal edges of the rate and from the gasket groove
Beads with a forming depth greater than the forming depth of the corrugated part
Are formed in at least one line along the longitudinal direction.
Bead transmission with the bead protruding direction aligned in the same direction and laminated
Heat transfer plate with bead at the end of bead protrusion direction of heat plate
Between the movable frame and the fixed frame.
Smaller than the width between the beads on both sides of the heat transfer plate with
A plate heat exchanger characterized by having a pacer .