JP2515119Y2 - Plate heat exchanger - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-type heat exchanger, and more specifically, to a cantilever of a plurality of heat transfer plates only on the fixed frame side without using a supporting bar for a guide bar. The present invention relates to a small plate type heat exchanger supported in a shape.

[0002]

2. Description of the Related Art Generally, in a plate heat exchanger, as shown in FIG. 3, a plurality of heat transfer plates (2) (2 ') having a heat transfer surface (1) are attached to gaskets (3) (4). The heating paths (5) and the heat receiving paths (6) are alternately formed by alternately laminating the heating fluid and the heating fluid to exchange heat between the working fluids.

By the way, as shown in FIGS. 4 and 5, a conventional small plate type heat exchanger (a) includes a fixed frame (8) having guide bars (7) and (7), and this fixed frame. Between the (8) and the movable frame (9) facing each other, a plurality of heat transfer plates (2) (2 ') guided and held by the guide bars (7) (7) are attached to the gaskets (3) (4). )
It is laminated through. Above fixed frame (8)
A plurality of legs (10), (10) and (11) are integrally provided at the lower end of the, and the fixed frame (8) stands up by the legs (10), (10) and (11) to stack the plates. Hold the body like a cantilever. Guide bar (7) (7) above
Are projectingly provided in parallel in a horizontal posture and in a cantilever shape at the lateral center portions of both ends in the longitudinal direction of the fixed frame (8), and the tip portions of the guide bars (7) and (7). Are slidably pierced through the longitudinal center portions of the longitudinal ends of the movable frame (9). Notch portions (12) (12) are formed in the central portions of both end portions in the longitudinal direction of the heat transfer plates (2) (2 ′), and the notch portions (12) (12) are formed into the guide bars (7) ( The heat transfer plates (2) and (2 ′) are stacked between the fixed frame (8) and the movable frame by removably fitting them in 7).

At the symmetrical positions of both end edges of the fixed frame (8) and the movable frame (9) facing each other in the lateral direction,
A plurality of notched recesses (13) (1
4) respectively, and tightening bolts (15) in the notch recesses (13) (14) facing each other of both frames (8) (9).
In parallel with each other, and tighten each tightening bolt (1
The tightening nut (17) screwed to the screw portion (16) at the tip of 5) is tightened via the washer (18), and a plurality of sheets between the fixed frame (8) and the movable frame (9) are tightened. The heat transfer plates (2) and (2 ′) are fastened in the stacking direction to secure the liquid tightness of the heat applying path (5) and the heat receiving path (6). The washer (18) is also arranged on the head side of the tightening bolt (15).

[0005]

According to the conventional plate type heat exchanger (a), the fixed frame (8) and the movable frame (9) are provided at the longitudinal center portions of both longitudinal ends thereof with
As shown in FIG. 5, since guide bars (7) and (7) are present, tightening bolts for providing liquid tightness of the heating path (5) and the heat receiving path (6) are arranged in the central portion. Can not do it. Therefore, the heating passage (5) is provided over the entire circumference.
In order to obtain the liquid-tightness of the heat receiving passage (6), the tightening bolts (15) are arranged at the four locations P near both sides in the lateral direction of the longitudinal ends of the heat transfer plate (2) (2 '). Need to be installed. For this reason, a large number of tightening bolts (15) and tightening nuts (17) must be used for the plate type heat exchanger as a whole, which requires a great deal of labor and time for workers in tightening and loosening work. In addition, there is a problem that assembly and disassembly take time and workability is extremely poor.

The present invention has been proposed in view of the above problems, and an object of the present invention is to provide a small plate heat exchanger capable of reducing the number of tightening bolts and the like used.

[0007]

In order to achieve the above object, the present invention provides a fixed frame having cantilevered guide bars at both ends in the longitudinal direction and tip portions of the guide bar at both ends in the longitudinal direction. Is slidably penetrated, and between the fixed frame and the movable frame facing each other, a plurality of heat transfer plates guided and held by the above-mentioned guide bar are laminated via a gasket to provide a heat-supplying path and a heat receiving path. In the plate heat exchanger in which the paths are alternately arranged, and both lateral edges of the fixed frame and the movable frame are fastened and fixed by a plurality of fastening bolts, a screw portion is provided at the tip of the guide bar. A sleeve is removably fitted into the screw portion, and a tightening nut capable of tightening the movable frame via the sleeve is screwed and tightened onto the screw portion.

[0008]

The central portions in the lateral direction of the longitudinal ends of the fixed frame and the movable frame are tightened via the sleeve by tightening the tightening nuts screwed into the screw parts at the tips of the guide bars. As described above, it is not necessary to dispose the tightening bolts near both ends of the heat transfer plate in the longitudinal direction, and as a result, the number of tightening bolts and tightening nuts to be used is reduced, and moreover, the entire circumference is reduced. It is possible to sufficiently secure the liquid tightness of the heating path and the heat receiving path.

[0009]

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. Incidentally, FIGS.
The same parts as those shown in FIG.

The plate heat exchanger (b) of this embodiment is
As shown in FIGS. 1 and 2, between the fixed frame (21) and the movable frame (22) facing the fixed frame, a plurality of transmissions guided and held by guide bars (23) and (23). The heat plates (2), (2 ') are laminated via gaskets (3), (4), and a plurality of legs (10), (10), (1) are provided at the lower end of the fixed frame (21).
1) is integrally provided, and this leg part (10) (10)
The fixed frame (21) is held upright by (11). The guide bar (23) (23) has a large diameter shaft portion (2
The first small diameter screw portion (25) is formed by forming a short first small diameter screw portion (25) at the base end of 4) and a long second small diameter screw portion (26) at the distal end. , Fixed frame (2
1) penetrates the longitudinal center portions of both ends in the longitudinal direction, and the tightening nut (2) is attached to the first small-diameter screw portion (25).
7) are screwed and tightened, and guide bars (23) and (23) are provided at the longitudinal center portions of the fixed frame (21) at both longitudinal ends.
Are parallel to each other in a horizontal posture and project like a cantilever. Further, the leading end of the large-diameter shaft portion (24) of the guide bar (23) (23) is slidably pierced through the lateral center portions of both ends in the longitudinal direction of the movable frame (22). At the tip of the guide bar (23) (23), the inner diameter is set to the guide bar (23).
A sleeve (28) having substantially the same size as the outer diameter of the large-diameter shaft portion (24) of (23) is concentrically fitted and the inner end portion (29) of the sleeve (28) is inserted into the guide bars (23) (23). ) Is detachably fitted to the large-diameter shaft portion (24) to bring the inner end surface of the sleeve (28) into contact with the movable frame (22), and
Of the small-diameter screw portion (26) of the above-mentioned sleeve (28)
Protrude more outward. The guide bar (23) (2
3) The tightening nut (30) is screwed and tightened onto the tip protruding portion of the second small-diameter screw portion (26), and the sleeve (28) is pressed against the movable frame (22) by the tightening force. Firmly tighten the short-side intermediate portions of the longitudinal ends of the frames (21) and (22).

The intermediate portions of the fixed frame (21) and the movable frame (22) in the longitudinal direction at both ends in the longitudinal direction are the second small-diameter screw portions (26) of the guide bars (23) (23).
Since it is firmly tightened through the sleeve (28) by the tightening force of the tightening nut (30) that is screwed tightly to the heat transfer plate (2) (2 '), both ends in the longitudinal direction are short. It is unnecessary to dispose the tightening bolts near both sides in the hand direction, and it is possible to reduce the number of tightening bolts used as compared with the conventional one.

That is, the fixed frame (21) facing each other
Further, a plurality of cutout recesses (31) (32) which are inclined downward toward the inside are formed at symmetrical positions of intermediate portions of both side edges of the movable frame (22) in the lateral direction. Opposing notch recesses (31) (32) of each frame (21) (22)
The tightening bolts (15) are horizontally fitted in parallel with each other, and the tightening nuts (17) screwed into the screw parts (16) at the tips of the respective tightening bolts (15) are inserted through the washers (18). Tighten, and firmly tighten the intermediate portions of both side edges of the both frames (21, 22) in the lateral direction.

Therefore, the short-side intermediate portions of the ends of the fixed frame (21) and the movable frame (22) in the longitudinal direction are tightened by using the guide bars (23) and (23). Since the intermediate portions of both end edges of (21) and (22) in the lateral direction are tightened by using a plurality of tightening bolts (15), the number of tightening bolts used is reduced as compared with the conventional one. Therefore, sufficient liquid-tightness of the heating path (5) and the heat receiving path (6) can be obtained over the entire circumference of the plate heat exchanger (b).

[0014]

According to the present invention, since both ends of the fixed frame and the movable frame in the longitudinal direction can be fastened by using the guide bars, the ends of the heat transfer plate can be provided in the vicinity of the both ends in the longitudinal direction as in the conventional case. It is not necessary to provide a tightening bolt. As a result, the tightening points with the tightening bolts are sufficient only at the middle parts of the lateral edges of each frame, and it is possible to significantly reduce the number of tightening bolts and tightening nuts used. Also, the labor and time and effort of the worker in the slow-moving work can be reduced, and the workability of assembling and disassembling the plate heat exchanger is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a plate heat exchanger according to the present invention.

FIG. 2 is a front view of a plate heat exchanger according to the present invention.

FIG. 3 is a partially exploded perspective view of a general plate heat exchanger.

FIG. 4 is a side view of a conventional plate heat exchanger.

FIG. 5 is a front view.

[Explanation of symbols]

 2, 2'heat transfer plate 3, 4 gasket 5 heating path 6 heat receiving path 15 tightening bolt 21 fixed frame 22 movable frame 23, 23 guide bar 26 screw part 28 sleeve 30 tightening nut

Claims (1)

(57) [Scope of utility model registration request] 1. A fixed frame having guide bars protruding in a cantilever shape at both ends in the longitudinal direction, and tip portions of the guide bar slidably penetrated at both ends in the longitudinal direction and facing the fixed frame. Between the movable frame and the movable frame, a plurality of heat transfer plates guided and held by the guide bar are laminated with a gasket interposed therebetween, and heating paths and heat receiving paths are alternately arranged, and the fixed frame and the movable frame are also arranged. In a plate type heat exchanger having both side edges in the lateral direction tightened and fixed by a plurality of tightening bolts, a screw portion is provided at the tip end portion of the guide bar, and a sleeve is removably fitted and inserted into the screw portion. A plate heat exchanger characterized in that a tightening nut capable of tightening a movable frame via a sleeve is screwed and tightened onto the screw portion.