JPH0249508Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a spiral heat exchanger, and more particularly to a heat exchanger having four or more medium passages.

BACKGROUND ART Conventionally, a spiral heat exchanger having four or more medium passages has been constructed by winding four heat exchanger plates with appropriate gaps between them, as shown in Japanese Patent Application Laid-open No. 12596/1983. , each terminal end is bent and welded onto the respective outermost peripheral plate and closed.

Further, for the purpose of improving the pressure resistance of a spiral heat exchanger, a structure in which the outer periphery of a wound heat exchanger plate is covered with a thick outer shell is found in Japanese Utility Model Application Publication No. 57-154861.

Problems to be Solved by the Invention In the conventional examples as described above, the former structure in which the heat transfer plate is bent and welded as it is has a problem in pressure resistance. In addition, although the latter is used for heat exchange between two fluids, it does not have more than four passages.

Means for Solving the Problems The present invention aims to solve the above problems and provide a means that can be applied to spiral heat exchangers with four or more passages and has excellent pressure resistance. The heat exchanger plate is spirally wound to provide four or more passages as passages for the medium to exchange heat, a closing plate is attached to the end of each passage, and a plurality of perfect circular cylindrical bodies are installed in advance in the diametrical direction. An outer shell that is divided into pieces and is thicker than the heat transfer plate is attached and integrated via the blocking plate, and a plurality of nozzles are directly attached to this outer shell and a flow path forming plate immediately inside the outer shell. The spiral heat exchanger has a plurality of directly attached nozzles.

Function In this invention, the outer shell is a perfectly circular cylindrical body divided into a plurality of pieces in the diametrical direction, and the outer shell is attached via a contact plate attached to the terminal end of the outermost circumferential flow path constituting plate. Since it is a perfectly circular cylindrical body, it has strong strength and improved pressure resistance. Moreover, since the outer shell is thicker than the heat transfer plate, pressure resistance can be further improved, and blockage by welding or the like can be ensured.

Embodiment The embodiment shown in the drawings will be explained. Reference numerals 1 to 4 designate heat transfer plates, which are wound around each other with appropriate spaces from the center to form four passages for the medium to be heat exchanged. Spacers, stud pins, etc. are omitted from illustration. 5 and 6 are backing plates, which are the heat exchanger plates 1 to 6;
It is attached to the terminal end of the outermost circumferential passage forming plate 4, and the contact plates 7 and 8 are attached near the terminal end of the outermost circumferential passage forming plate.

Reference numerals 9 to 10 denote outer shells, which are thicker than the heat exchanger plates 1 to 4 and have stronger pressure resistance, and are divided into two parts in the diameter direction. Nozzles 11 to 14 serve as fluid inlets and outlets, and the shapes of these nozzles are not limited to those shown.

Note that the nozzle attached to the central cross partition wall is not shown.

The nozzles 11 and 13 were attached to the flow path forming plate just inside the outermost shell, and the nozzles 12 and 14 were attached directly to the outer shells 9 and 10.

Since the outer shells 9 to 10 can be manufactured separately from the heat exchanger plates 1 to 4, a thick material with high pressure resistance can be used. Furthermore, by forming a perfectly circular cylindrical body, pressure resistance is further improved.

Although the present embodiment shows the case of four passages, the present invention is not limited to this, and by configuring the number of medium passages in each corner, it is possible to perform heat exchange between more fluids.

Also, although the nozzles 11 to 14 are shown in four locations in the plan view, the nozzles 11 and 12, 13 and 14 may be arranged on the same plane (different positions in the height direction), or the heat exchanger plates 1 and 2 By arranging nozzles 3 and 4 close to each other, it is also possible to arrange all nozzles 11 to 14 in the same direction.

Effects of the invention In this invention, in a spiral heat exchanger with four or more medium passages, the outer shell is constructed separately from the heat transfer plate, so the outer shell is made of a material that is highly pressure resistant and thick. can be used. Furthermore, since the outer shell is a perfectly circular cylindrical body divided into a plurality of parts in the diameter direction, it has a perfectly circular shape when welding is completed, further improving pressure resistance. In addition, the heat transfer plate provided inside has a passage forming plate extended and attached to the terminal end, and a contact plate is attached to each of these, and contact plates 7 and 8 are attached to the outermost circumferential flow passage forming plate, and a It can be welded to the outer shell, ensures a closed state, and is easy to manufacture.
The practical effects are significant. In particular, even if the heat transfer plate is made of a material and plate thickness with good heat transfer performance depending on the type of fluid and pressure, the outer periphery is protected by the outer shell, so it is fully effective in terms of safety. A spiral heat exchanger can be provided.

[Brief explanation of the drawing]

The drawing is a sectional view of a main part of an embodiment of the spiral heat exchanger of the present invention. 1-4...Heat transfer plate, 5-8...Packing plate, 9-10
...Outer body, 11-14...Nozzle.

Claims (1)

[Scope of utility model registration request] As passages for the medium to exchange heat, a heat transfer plate is spirally wound to provide four or more passages, a closing plate is attached to the end of each passage, and a plurality of perfect circular cylindrical bodies are prepared in advance in the diametrical direction. An outer shell that is thicker than the heat transfer plate is attached and integrated via the blocking plate, and a plurality of nozzles are attached directly to this outer shell and directly to the flow path forming plate immediately inside the outer shell. A spiral heat exchanger characterized by having a plurality of attached nozzles.