JP2552569Y2 - 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, it is used for air-conditioning of a building. The present invention relates to a shape of a notch hole for a tightening bolt of a plate heat exchanger that performs heat exchange in step (a).

[0002]

2. Description of the Related Art For example, a plate-type heat exchanger used for heating and cooling water for heating and cooling water for air-conditioning of buildings and the like, as shown in FIG. 3 and FIG. A structure having a structure obtained by polymerizing and integrating 1) is generally used.

The structure of the plate type heat exchanger will be described in detail. A plate-shaped fixed frame (2) and a prismatic support (3) are erected on the floor in parallel with each other, and the fixed frame ( Upper and lower guide bars (4) and (5) are laid horizontally and parallel between 2) and the upper and lower portions of the support (3), respectively. A plurality of heat transfer plates (1) are formed along the longitudinal direction between the upper and lower guide bars (4) and (5) by engaging grooves (not shown) formed on the outer peripheral upper and lower edges with the upper and lower guide bars. Polymerization is performed in a state of being engaged with the bars (4) and (5). On the other hand, the movable frame (6) is slidably mounted on the upper and lower guide bars (4) and (5) and is arranged in parallel with the fixed frame (2), and the superposed heat transfer plate (1) is fixed to the fixed frame. (2) and the movable frame (6). Then, U-shaped cutout holes (7) and (8) are formed in the outer peripheral side edges of the fixed frame (2) and the movable frame (6),
Tightening bolts (9) are inserted into the notched holes (7) and (8), and the heat transfer plate (1) is fixed to the fixed frame (2) and the movable frame (6) with the fastening bolts (9). It is clamped and fixed between.

[0004]

By the way, in the conventional plate heat exchanger, as described above, the notch holes (7) (8) for the fastening bolts provided in the fixed frame (2) and the movable frame (6). ) Are U-shaped, and the opening dimensions (w) of the notched holes (7) and (8) are larger than the outer diameter dimension (d) of the tightening bolt (9). Thereby, when disassembling the plate heat exchanger at the time of maintenance or the like, the fastening bolts (9) can be detached from the side surfaces of the fixed frame (2) and the movable frame (6).

However, in the above structure, when the plate heat exchanger is disassembled, the fastening bolt (9) must be completely removed from the fixed frame (2) and the movable frame (6). The storage space of 9) is required, and when the fastening bolt (9) is placed on the floor, there is a possibility that foreign matter such as dust adheres to the screw portion, causing a galling or being lost. There was a problem.

Accordingly, the present invention has been proposed in view of the above problems, and an object of the present invention is to provide a plate-type heat exchanger which facilitates handling of tightening bolts during disassembly such as maintenance. is there.

[0007]

The technical means for achieving the above object of the present invention is to engage upper and lower horizontal and parallel upper and lower guide bars between a fixed frame and a support. In a state where a large number of heat transfer plates are superimposed in a state in which the heat transfer plates are overlapped, and the superposed heat transfer plates are sandwiched between a fixed frame and a movable frame and fastened and fixed by tightening bolts on the sides, the fixed frame or the movable frame is used. The opening dimension of the notch hole for one of the tightening bolts is smaller than the outer diameter of the tightening bolt.

[0008]

In the plate heat exchanger according to the present invention, the opening size of the notch hole for the tightening bolt of either the fixed frame or the movable frame is made smaller than the outer diameter of the tightening bolt, so that the disassembly such as maintenance can be performed. Time,
The tightening bolts can be removed in a state where they are locked in the notch holes, and there is no need for a storage place for the removed tightening bolts. There is no possibility of loss.

[0009]

1 and 2 show an embodiment of a plate heat exchanger according to the present invention. The same parts as those of the plate heat exchanger shown in FIGS. 3 and 4 are denoted by the same reference numerals, and the description thereof will not be repeated.

The feature of the present invention lies in the shape of a notch hole (10) for a tightening bolt as shown in FIG. That is, the opening dimension (W) of the notch hole (10) for the tightening bolt of either the fixed frame (2) or the movable frame (6).
Is smaller than the outer diameter (d) of the tightening bolt (9). For example, when the opening dimension (W) of the notch hole (10) for the fastening bolt of the fixed frame (2) is smaller than the outer diameter dimension (d) of the fastening bolt (9), the movable frame (6) is fastened. Notch hole for bolt (8)
As in the prior art, the U-shape is used, and the opening dimension (w) is made larger than the outer diameter dimension (d) of the tightening bolt (9).
Processing of the notch hole (10) can be easily realized because the outer shape of the fixed frame (2) can be processed by gas cutting at the same time as processing the outer shape of the fixed frame (2).

Due to the above structure, in the plate heat exchanger of the present invention, when disassembled for maintenance or the like, as shown in FIG. 2, clamping bolts (9) attached to both sides of the fixed frame (2) and the movable frame (6). ) And (9 ′), the work side fastening bolt (9) (shown by a dashed line in the figure) located on the side where maintenance is performed is inserted into the notch hole (9) of the movable frame (6). 8) After moving away from the fixed frame (2), remove the end of the fixed frame (2).
Remove with the lock at 0). On the other hand, with respect to the non-work side fastening bolt (9 ') (shown by a dashed line in the figure) located opposite to the maintenance side, the fastening bolt (9') is inserted into the notch hole (8) of the movable frame (6). ) And remove it while retaining it in the notch hole (10) of the fixed frame (2). As a result, the heat transfer plate (1) can be disassembled and maintenance can be performed.

At this time, the fastening bolt (9) on the maintenance side is disposed outside the fixed frame (2) while being locked in the notch hole (10), and the portion of the heat transfer plate (1) is provided. Is released, and maintenance is possible even with the fastening bolt (9) attached. Also, at the time of this maintenance, there is no need for a storage place for the tightening bolts (9), and since it is not placed on the floor, there is no adhesion of foreign matter such as dust to the screw portion, and there is no possibility of loss. In addition, when the process proceeds to the assembling operation, the fastening bolt (9) can be attached to the notch hole (8) of the movable frame (6) with one touch.

In the above embodiment, the fixed frame (2)
The opening size (W) of the notch hole (10) is smaller than the outer diameter (d) of the tightening bolt (9), and the notch hole (8) of the movable frame (6) is the same as the conventional one. The present invention is not limited to this, and conversely to the above, the opening size of the notch hole of the movable frame (6) is made smaller than the outer diameter size (d) of the tightening bolt (9), and the fixed frame (2) is formed. It goes without saying that the cut-out holes in ()) may be the same as in the conventional case.

[0014]

According to the plate heat exchanger of the present invention, the opening dimension of the notch hole for the tightening bolt of either the fixed frame or the movable frame is made smaller than the outer diameter of the tightening bolt. At the time of disassembly for maintenance or the like, the fastening bolt can be removed while being locked in the notch hole. Therefore, there is no need for a storage space for the removed tightening bolts, and since it is not placed on the floor, there is no possibility that foreign matter such as dust adheres to the screw portion, and there is no possibility that the bolts may be lost. Can be attached with one touch. in this way,
At the time of disassembling or assembling work, the handling of the tightening bolt becomes very easy, and workability is greatly improved.

[Brief description of the drawings]

FIG. 1 is an enlarged side view of a main part showing a cutout hole for a tightening bolt of a plate heat exchanger in an embodiment of the present invention.

FIG. 2 is a front view showing the plate heat exchanger with the fastening bolts removed according to the present invention;

FIG. 3 is a front view showing a plate heat exchanger.

FIG. 4 is a partially enlarged side view showing notched holes for tightening bolts in a conventional plate heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat transfer plate 2 Fixed frame 3 Support 4 Upper guide bar 5 Lower guide bar 6 Movable frame 9 Tightening bolt 10 Notch hole d Outside diameter dimension W Opening dimension

Claims (1)

(57) [Scope of request for utility model registration] 1. A heat transfer plate comprising a plurality of heat transfer plates superposed in a state in which the heat transfer plates are engaged with upper and lower guide bars horizontally and parallelly arranged between a fixed frame and a support. The plate is sandwiched between the fixed frame and the movable frame, and is fixed by tightening the side of the plate with the tightening bolt. The opening dimension of the notch hole for the tightening bolt of one of the fixed frame and the movable frame is set outside the tightening bolt. A plate heat exchanger characterized in that it is smaller than the diameter.