JPH0313518B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention involves arranging a plurality of hollow panels for heat exchange in parallel at appropriate intervals and integrating them, and allowing a fluid for heat exchange to flow through each of these hollow panels. It is a panel type heat exchanger that is mainly used by being set in a storage tank of a fluid to be heat exchanged or in a flow path of the fluid, and the fluid flowing through each hollow panel and each hollow The present invention relates to a panel type heat exchanger that exchanges heat with a fluid located in a gap between panels or a fluid flowing in the gap.

(Prior art and its problems) The above-mentioned panel type heat exchanger includes a fluid supply pipe line and a fluid discharge pipe line that pass through each of a large number of hollow panels arranged in parallel in the parallel direction. ,
The fluid flowing through the fluid supply pipe is divided into each hollow panel, and the fluid flowing through a predetermined flow path in each hollow panel and subjected to heat exchange is merged into the fluid discharge pipe and discharged. It is composed of
In the conventional panel heat exchanger of this type, the fluid supply pipe and the discharge pipe were constructed as follows.

That is, a short cylindrical body is fixedly protruded by welding from each of the through holes provided so as to face each other in the plates on both sides forming each hollow panel, and the cylindrical body protruding from both panels is provided between adjacent hollow panels. By fitting the bodies into each other and firmly connecting both cylindrical bodies to each other by welding at this fitting location, a fluid supply conduit or a fluid discharge conduit passing through each hollow panel in the parallel direction is constructed. was.

In a conventional panel heat exchanger having such a configuration, a large number of hollow panels arranged in parallel are integrated in a manner that cannot be disassembled by the fluid supply conduit and the discharge conduit. Generally, in this type of panel heat exchanger, the gap between the hollow panels is very narrow, around 20 mm, so if the hollow panels cannot be separated from each other as described above, the gap between the hollow panels Even if scale from the flowing fluid adheres to the surface of the hollow panel, it is almost impossible to clean it off. Therefore, conventional panel-type heat exchangers are used only when the fluid flowing through the gaps between the hollow panels has almost no scale buildup, which greatly limits its applications. was.

On the other hand, in terms of manufacturing, as mentioned above, short cylindrical bodies must be fixed and protruded from each hollow panel on both sides by welding, and both cylindrical bodies must be fixedly protruded from each hollow panel in an extremely narrow space between two adjacent hollow panels. The manufacturing cost is extremely high due to the fact that the shaped bodies must be joined by welding. In particular, it is impossible to manually weld the fitting part of both cylindrical bodies over the entire circumference within the extremely narrow space between both adjacent hollow panels as described above, so a special automatic welding method is required. I needed a machine.

Utility Model Publication No. 53-33878 discloses a heat exchanger in which a plurality of heat transfer units are fastened together by stacking bolts through packing material. However, since this uses bolts, it is not possible to position the heat transfer unit or packing.
Furthermore, it is necessary to drill many holes in the ring-shaped fitting for guiding the fluid into the monad, which requires a lot of processing time.

(Means for Solving the Problems) The present invention proposes a panel-type heat exchanger that can solve the conventional problems as described above, and its feature is that two plates are placed between them. A through hole is provided through which a fluid supply pipe and a fluid discharge pipe pass through the heat exchange hollow panel which are joined to each other to form a flow path, and a through hole is provided between the two plates on both sides around the through hole. A reinforcing ring that prevents the gap between the two side plates from narrowing and has radial flow passages is interposed, and the required number of plates are provided for the fluid supply pipe and the fluid discharge pipe, which have flow holes extending in the axial direction on the outer periphery. The hollow panels are fitted so that they can be pulled out and disassembled in the tube axis direction, with an annular sealing material having an inner diameter that is approximately equal to the outer diameter of the fluid supply pipe and the discharge pipe fitted between the hollow panels. The radial flow passage of the reinforcing ring is formed in the space surrounded by the plate and the recessed part radially formed on the side surface of the ring without the need for drilling holes. The point is that it is formed as follows.

(Function) In the configuration of the present invention as described above, the space around the fluid supply pipe and the discharge pipe is safely isolated from the outside world by each hollow panel and the annular sealing material between each hollow panel. ing. Therefore, the fluid supplied into the fluid supply pipe is divided into each hollow panel from the circulation hole in the pipe peripheral surface via the radial flow path of the reinforcing ring in each hollow panel, and then flows into each hollow panel. The fluid flowing through the flow path joins into the discharge pipe from the radial flow passage of the reinforcing ring located outside the fluid discharge pipe via the communication hole on the pipe peripheral surface.

Therefore, one fluid (the first fluid) of the two fluids that exchange heat with each other is supplied to the panel heat exchanger of the present invention, and the panel heat exchanger of the present invention is connected to the other fluid (the first fluid). By setting it in the storage tank or the flow path of the second fluid,
Performing a predetermined heat exchange action between the first fluid flowing within each hollow panel as described above and the second fluid located in or flowing within the gap between each hollow panel. I can do it.

Furthermore, when the hollow panels are tightened in the axial direction of the fluid supply pipe and the discharge pipe to integrate them, even if the annular sealing material between the hollow panels is sufficiently tightened to obtain the desired sealing effect, The reinforcing ring prevents the plates on both sides of each hollow panel from bending inward due to the reaction force of the tightening, thereby ensuring a constant space for the fluid inlet and outlet of each hollow panel. Of course, by unfastening each hollow panel, each hollow panel and the annular sealing material are pulled out in the axial direction from the fluid supply pipe and the discharge pipe,
Each can be separated.

Further, no hole drilling is required to form radial flow passages in the reinforcing ring.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a rectangular hollow panel for heat exchange, and a zigzag band-shaped channel 3 is formed between two plates 2 on both sides of the channel 3. Both plates 2 are integrally joined to each other by a seam weld 4. Although not shown in FIG. 2, both plates 2 are connected to the flow path 3 as shown in FIGS. 3 to 5.
Both plates 2 are recessed inwardly in an appropriate shape, and both plates 2 are joined to each other by spot welds 6 within the recessed portions 5, thereby increasing the strength of the panel 1 and keeping the cross-sectional area of the flow path 3 constant. The heat exchange efficiency can be improved by making the fluid flowing in the flow path 3 turbulent. Of course, the shape, length, and cross-sectional area of the flow path 3, or the arrangement, shape, and size of the recessed portion 5 may be set depending on the purpose of use of this heat exchanger, the type of fluid used, etc. , but not limited to what is shown.

The hollow panel 1 is provided with circular wide portions 7 formed by bulging both plates 2 outward at both ends of the flow path 3. A through hole 10 (see FIG. 6) for passing the fluid supply pipe 8 and fluid discharge pipe 9 shown in FIGS. 1 and 2 (see FIG. 6) is provided concentrically with the wide portion 7. As shown in FIGS. 1, 3, and 6, the wide portion 7 is provided with reinforcement whose inner diameter is approximately equal to the diameter of the through hole 10 and whose outer diameter is approximately equal to the inner diameter of the wide portion 7. A ring 11 for use is inserted. Since this reinforcing ring 11 is positioned concentrically with the through hole 10 by the wide portion 7, it can be fitted into the wide portion 7 of one plate 2 before joining the plates 2 on both sides. It is fine, and there is no particular need to fix it to the plate 2. or,
As shown in FIG. 7, this reinforcing ring 11 includes an inner circumferential annular groove 12 and a large number of radial flow passages 13. It is constituted by recesses formed radially on both side surfaces so as to communicate with the.

Since a hole is not drilled in the center of the reinforcing ring 11, processing is easy. The flow passages 13 on both sides of the reinforcing ring are arranged so as to be inconsistent with each other in the circumferential direction, as shown in FIG.
If the width of the reinforcing rings 11 is sufficient, or if the flow passage 13 is formed shallowly, they may be arranged adjacent to each other in the axial direction.

The fluid supply pipe 8 and the discharge pipe 9 are connected through joint pipes 17 to the lower ends of a fluid supply main pipe 15 and a fluid discharge main pipe 16, respectively, which are attached to the support plate 14 in a penetrating state, as shown in FIGS. 1 and 2. It is fixed and protruded in a T-shape, and the free end has a threaded part 1.
8, and a slit-shaped communication hole 1 extending along the axial direction in the mounting area of the hollow panel 1.
9 are provided at multiple locations in the circumferential direction (four locations in the illustrated example).

A required number of the hollow panels 1 are arranged in parallel so that the fluid supply pipe 8 and the discharge pipe 9 pass through the through hole 10 of each wide portion 7. At this time, the joint pipe 17 and the adjacent hollow panel 1 and between each hollow panel 1, there is an annular sealing material 20 having an inner diameter that is approximately the same as the outer diameter of the fluid supply pipe 8 and the discharge pipe 9, which is fitted onto the fluid supply pipe 8 and the discharge pipe 9, and an annular sealing material 20. A backup spring 21 that fits externally is interposed. Of course, the annular sealing material 20 and the backup spring 21 abut against the outer surface of the wide portion 7 of each hollow panel 1.

As described above, each hollow panel 1 set in parallel with the fluid supply pipe 8 and the discharge pipe 9 has an annular sealing material 20 and a back-up spring 21 interposed between it and the outermost hollow panel 1. In this state, the liquid supply pipe 8 and the discharge pipe 9 are fastened and integrated in the axial direction by tightening the nuts 22 screwed into the free end threaded portions 18 of the fluid supply pipe 8 and the discharge pipe 9. At this time, each annular seal member 20 is compressed and deformed to a state where the backup spring 21 functions. Furthermore, the free end threaded portions 1 of the fluid supply pipe 8 and the discharge pipe 9
A cap 23 which also serves as a lock nut is screwed into the fluid supply pipe 8 and the free end openings of the fluid supply pipe 8 and the discharge pipe 9 are closed.

In addition, both free end corner portions of each hollow panel 1 are provided with connecting rods 25 and 26 that penetrate the seam welded portion 4 of each hollow panel 1 and have a spacer 24 loosely fitted between each hollow panel 1. and the relevant shaft 2
Nuts 27 screwed into the screw shafts at both ends of 5 and 26
A and 27b are similarly fastened and integrated. Reference numeral 28 denotes a plate for holding the center position of both shaft rods 25 and 26, and is attached to the joint pipe 17 located at the center of the fluid supply pipe 8 and discharge pipe 9 via a bracket 29 and a bolt/nut 30. ing.

In the panel heat exchanger constructed as described above, the fluid supplied from the main fluid supply pipe 15 enters the fluid supply pipe 8 through the joint pipe 17 and flows out through the slit-shaped flow hole 19. This fluid flows through the inner annular groove 12 of the reinforcing ring 11 in each hollow panel 1.
The fluid flows from the radial flow path 13 to one end of the zigzag flow path 3 in each hollow panel 1, flows through the zigzag flow path 3, reaches the other end, and loosely fits into the fluid discharge pipe 9. The fluid discharge pipe 9 passes through the radial flow passage 13 of the reinforcing ring 11, the inner circumferential annular groove 12, and the slit-shaped flow hole 19 of the fluid discharge pipe 9.
The fluid flows into the joint pipe 17 from inside this fluid discharge pipe 9.
and is discharged via the fluid discharge main pipe 16.

Therefore, one of the two fluids (the first fluid) which is caused to exchange heat with each other is supplied to the main fluid supply pipe 15.
By using this panel type heat exchanger by setting it in the storage tank of the other second fluid or in the flow path of the second fluid, the second fluid can be supplied to each of the hollow panels. While flowing in the gap between the hollow panels 1 and 1, it undergoes a heat exchange action with the first fluid flowing in the flow path 3 of each hollow panel 1, and a desired heat treatment involving heating or cooling is performed.

The panel heat exchanger used as above is
It can be disassembled and cleaned as follows. That is, the nut 2 screwed onto the free ends of the connecting shafts 25 and 26
7a, 27b and pull out both shaft rods 25, 26 from each hollow panel 1, and each spacer 24.
and the cap 23 and nut 22 screwed onto the free ends of the fluid supply pipe 8 and the discharge pipe 9.
By removing the hollow panels 1, the annular sealing material 20, and the back-up spring 21 can be pulled out in the axial direction from the tubes 8 and 9.
As a result, each hollow panel 1 can be freely handled independently, so that necessary maintenance work can be easily performed.

In addition, when forming the wide part 7 for positioning the reinforcing ring 11 on the hollow panel 1 as in the above embodiment, the reinforcing ring 11 is attached to the hollow panel 1.
Since the reinforcing ring 11 can be formed wider than the inner width of the flow path 3, it is not only convenient to mold the reinforcing ring 11, but also the reinforcing ring 11 can be formed wider than the inner width of the flow path 3 of the plate 2.
There is no need for welding, making assembly easier.

The inner diameter of the reinforcing ring 11 is made appropriately larger than the outer diameter of the fluid supply pipe 8 and the discharge pipe 9, so that a sufficiently large annular space is formed between them. When the hollow panel 1 is configured to be positioned with respect to the discharge pipe 9 through the through holes 10 (see FIG. 6) provided in the plates 2 on both sides of the hollow panel 1, the positioning is as shown in FIG. 9. The inner circumferential annular groove 12 like the reinforcing ring 11a can be omitted. Also, reinforcing ring 1
Even if a wide annular space is not formed between the inner peripheral surface of the fluid supply pipe 8 and the outer peripheral surface of the fluid supply pipe 8 and the discharge pipe 9,
The circumferential width of the radial flow passage 13 may be increased, or the slit-shaped flow holes 19 provided in the fluid supply pipe 8 and the discharge pipe 9 may be made wider in the circumferential direction, and the width of the reinforcing ring 11 may be increased. When the hollow panel 1 is attached to the fluid supply pipe 8 and the discharge pipe 9 by providing radial flow passages 13 densely at small intervals in the circumferential direction, the radial flow passages 13 are always provided in the slit-shaped flow holes 19. If configured so that they face each other,
Similarly to the above, a reinforcing ring 11a without the inner circumferential annular groove 12 can be used.

Reinforcing ring 11 shown in FIGS. 10 and 11
b is constructed by bending the strip 31 in a zigzag shape in the circumferential direction, and all parts of the strip 31 except for the plate thickness portion form a radial flow path 13. Therefore, it is not necessary to specifically provide the inner circumferential annular groove 12 as shown in the figure, but as shown in FIG. It can also be formed.
Furthermore, when configuring such a reinforcing ring 11b, the planar shape of each flow passage 13 formed by the strip 31 bent in a zigzag shape is limited to the rectangular shape shown in FIG. Not a thing, but the 13th
It can be of any shape, such as the trapezoidal shape shown in the figure or the inverted trapezoidal shape shown in FIG. 14.

As described above, the structure of the reinforcing ring 11 is not particularly limited. Of course, as for the molding material, the most preferable one may be selected, such as various metals, plastics, ceramics, etc., in light of the type of fluid to be contacted, usage conditions, etc. In addition, the back-up spring 21 fitted onto the annular sealing material 20 compresses all the annular sealing materials 20 by a certain amount when the hollow panels 1 are fastened and integrated, thereby reducing the gap between the hollow panels 1. The use of the back-up spring 21 is not an essential condition of the present invention, although it is useful for ensuring the sealing effect of the annular seal member 20.

(Effects of the Invention) The panel heat exchanger of the present invention, which can be implemented as described above, can be achieved by simply fitting and fastening each hollow panel to a fluid supply pipe and a fluid discharge pipe alternately with an annular sealing material in the pipe axis direction. Easy to assemble. Moreover, when each hollow panel is tightened in the axial direction of the fluid supply pipe and the discharge pipe to be integrated, the reinforcing ring prevents the plates on both sides of each hollow panel from bending inward due to the reaction force of the tightening, Since the spaces of the fluid inflow and outflow portions of each hollow panel can be secured to a constant width, the first fluid can smoothly flow into the hollow panel as expected. Furthermore, due to the presence of the reinforcing ring, a thin plate with the minimum necessary thickness can be used as the plate forming the hollow panel, which can be implemented economically.

Furthermore, since the radial flow passage of the reinforcing ring is composed of recesses formed radially on the side surface of the ring, although it can be composed of one piece,
There is no need to drill a large number of radial through holes in the ring, and it can be constructed at low cost using very simple manufacturing methods such as cutting the side of the ring, integral molding with a mold, or zigzag bending of a band-shaped body. In this respect, it can also be implemented economically.

In addition, it can be easily disassembled simply by unfastening each hollow panel and pulling out each hollow panel and annular sealing material from the fluid supply pipe and discharge pipe in the axial direction. If the scale of the two fluids adheres to the surface of each hollow panel, reducing heat exchange efficiency or unduly increasing the flow resistance of the second fluid, disassemble and separate each hollow panel as described above. As a result, necessary maintenance work such as removing scale from the surface of the hollow panel can be performed extremely easily. Therefore, the panel type exchanger of the present invention can be used without any problem even under conditions where the second fluid is used where scale is likely to form and adhere.

Note that the fluid supply pipe and the fluid discharge pipe are completely isolated from the outside world by each hollow panel and the annular sealing material, which serves as a flow path for the second fluid, and there is no risk of contact with the second fluid. The fluid supply pipe and the fluid discharge pipe need only be made of a material that does not have an adverse effect in relation to the first fluid flowing in these pipes, and the conditions of both the first fluid and the second fluid should be taken into consideration. There is no need to select the material accordingly. For example, if the first fluid is water, hot water, steam, etc., even if the second fluid is strongly acidic, the fluid supply pipe and fluid discharge pipe are made of inexpensive iron-based materials (SS, SUS, etc.).
It is economical because it can be used with

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal side view, Fig. 2 is a partially longitudinal front view, Fig. 3 is an enlarged sectional view taken along line A-A in Fig. 1, and Fig. 4 is a line BB in Fig. 1. Enlarged cross-sectional view at
Figure 5 is an enlarged sectional view taken along line C-C in Figure 4;
7 is a perspective view of a reinforcing ring, FIG. 8 is a plan view of an essential part of the reinforcing ring, and FIG. 9 is a modification of the reinforcing ring. FIG. 10 is a perspective view showing a reinforcing ring of another embodiment. FIG. 11 is an enlarged vertical sectional view of the essential part of FIG. 10. FIG. 12 is a reinforcing ring shown in FIG. 11. FIGS. 13 and 14 are longitudinal sectional views of main parts showing a modification of the ring, and FIGS. 13 and 14 are plan views of main parts showing other modifications. 1... Hollow panel for heat exchange, 7... Hollow panel wide part, 8... Fluid supply pipe, 9... Fluid discharge pipe,
10...Through hole, 11, 11a, 11b...Reinforcing ring, 12...Inner peripheral annular groove, 13...Radial flow passage, 15...Fluid supply main pipe, 16...Fluid discharge main pipe, 19...Slit Shape circulation hole, 20... Annular sealing material, 21... Backup spring, 22
... Nut, 23 ... Cap that also serves as lock nut, 24 ... Spacer, 25, 26 ... Shaft rod for connection, 28 ... Shaft rod support plate.

Claims (1)

[Scope of Claims] 1. A through hole in which a fluid supply pipe and a fluid discharge pipe are respectively penetrated through a hollow panel for heat exchange, which is constructed by joining two plates to each other so as to form a flow path between them. A hole is provided between the two side plates around the through hole, and a reinforcing ring is interposed between the two side plates to prevent the gap between the two side plates from narrowing and has a radial flow path, A required number of hollow panels are provided on the fluid supply pipe and the fluid discharge pipe each having an extending communication hole, and an annular sealing material having an inner diameter approximately equal to the outer diameter of the fluid supply pipe and the fluid discharge pipe is provided between each hollow panel. This is a panel heat exchanger that can be pulled out in the axial direction of the tube and disassembled in the externally fitted state, and the radial flow passages of the reinforcing ring can be inserted into the ring without the need for hole drilling. A panel heat exchanger characterized by comprising a space surrounded by a plate and a concave portion formed radially on the side surface. 2. The heat exchanger according to item 1, wherein the through-hole forming portion of the hollow panel is formed by bulging both side plates outward to form a wide portion, and the reinforcing ring is fitted into the wide portion. 3. The heat exchanger according to item 1 or 2, wherein the reinforcing ring includes an inner circumferential annular groove that communicates with a radial flow path formed on the side surface. 4. The reinforcing ring is formed of a band-shaped body bent in a zigzag shape in the circumferential direction.
The heat exchanger according to any one of items 1 to 3. 5. The thermal sealant according to any one of the above items 1 to 3, wherein each of the annular sealing members is fitted with a back-up spring that prevents the distance between adjacent hollow panels from becoming less than a certain level. exchanger.