JPH04108181U - Heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] In a tube-and-shell heat exchanger, determine the temperature difference between part A that is in contact with the heat transfer tubes and parts B and B' that are not in contact with the tube support plate or baffle plate. To relieve thermal stress caused by [Structure] Slits 13 are provided inward from the outer periphery of the tube support plate or baffle plate 5 to absorb differences in thermal expansion.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a heat exchanger including a plurality of heat transfer tubes arranged in a fluid flow path.

0002

[Conventional technology]

Figure 5 is a vertical cross-sectional view showing an example of a conventional shell-and-tube heat exchanger, and Figure 6 is FIG. 5 is a VI-VI cross-sectional view, and FIG. 7 is a VII-VII cross-sectional view of FIG.

0003 1 is the shell of the heat exchanger, and inside it there are multiple tubes that pass through the tube sheets 2 and 3 on both sides. There are several heat transfer tubes 4, and baffle plates 5a, 5b and baffle plates forming a flow path for the extra-tube fluid 11. Tube support plates 6a, 6b, and 6c that support the heat exchanger tubes 4 and the heat exchanger tubes 4 are arranged. Also the shell Extraluminal fluid inlet pipe 7 and extraluminal fluid outlet pipe 8 are connected to the upper and lower parts of 1, respectively. ing. Further, at both ends of the shell 1, a fluid inlet pipe 9 and a fluid outlet pipe 10 are provided. are connected to each other.

0004 Extraluminal fluid 11 enters into shell 1 from extraluminal fluid inlet pipe 7 and passes through each baffle plate 5a. , 5b. At this time, the extra-tubular fluid 11 has multiple heat transfer The tube fluid 12 that crosses the outside of the tube 4 and flows inside each heat transfer tube 4 via the inlet tube 9 and each Heat is exchanged through the wall of the heat tube 4. The heat-exchanged extra-tube fluid 11 and intra-tube fluid 12 are , and then the shell 1 from the extra-tube fluid outlet pipe 8 and the inner-tube fluid outlet pipe 10, respectively. leaks to the outside.

[0005]

[Problem that the idea aims to solve]

In the conventional heat exchanger having the above configuration, there is a large temperature difference between the pipe fluid 11 and the pipe fluid 12. In this case, the contact portions of the heat exchanger tubes 4 of the baffle plates 5a, 5b and the tube support plates 6a, 6b, 6c (tube bundle part, perforated part) (dotted hatched area A in Figures 6 and 7) and the general part (Figure 6) 6 and B, B') in Fig. 7, the difference in thermal elongation This caused significant thermal stress.

[0006]

[Means to solve the problem]

In order to solve the above-mentioned conventional problems, the present invention incorporates multiple heat transfer tubes in the fluid flow path. In a heat exchanger arranged in A slit is provided inward from the outer periphery of the tube support plate that supports the heat transfer tube. This paper proposes a heat exchanger characterized by:

[0007]

[Effect]

In this invention, the largest thermal stress occurs on the baffle plate and tube support plate. By providing a slit in the section, the difference in thermal expansion due to the temperature difference between the tube bundle section and the general section can be reduced. absorbs and reduces thermal stress.

[0008]

【Example】

Figure 1 is a front view showing a baffle plate in one embodiment of the present invention, and Figure 2 is a front view showing a baffle plate in an embodiment of the present invention. It is a front view showing a holding plate. In this embodiment, as shown in the figure, the baffle plate 5 and By providing a slit 13 in the tube support plate 6, the structure absorbs the difference in thermal expansion. and reduce thermal stress. This slit 13 is located on the baffle plate as shown in the figure. 5 and the general parts B and B' near the hole A of the tube support plate 6, and the tip The parts are rounded to eliminate cracks.

[0009] The slits 13 may be provided in parallel from the perforated portion A toward the outer periphery. Moreover, at this time, the slit 13 may reach the outermost tube support hole.

0010 FIG. 3 is a front view showing the slit portion of the baffle plate in the second embodiment of the present invention. FIG. 4 is a cross-sectional view taken along IV-IV in FIG. 3. Providing a slit 13 in the baffle plate 5 As a result, the extratubular fluid 11 passes through this slit 13 and a bypass flow is generated. However, if it is necessary to prevent this, a blocking plate is used as in this example. Install 14. This closing plate 14 can be attached by welding or the like on only one side. Therefore, the area around the slit 13 is not restricted.

[0011]

[Effect of the idea]

In this invention, thermal expansion is achieved by slits provided in the baffle plate and tube support plate. It can absorb the difference in vibration and reduce thermal stress on the baffle plate and tube support plate.

[Brief explanation of drawings]

FIG. 1 is a front view showing a baffle plate in a first embodiment of the present invention.

FIG. 2 is a front view showing the tube support plate in the above embodiment.

FIG. 3 is a front view showing a slit portion of a baffle plate in a second embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along IV-IV in FIG. 3;

FIG. 5 is a longitudinal sectional view showing an example of a conventional shell-and-tube heat exchanger.

FIG. 6 is a VI-VI cross-sectional view of FIG. 5.

FIG. 7 is a cross-sectional view taken along VII-VII in FIG. 5;

[Explanation of symbols]

1 shell 2,3 Tube plate 4 Heat exchanger tube 5, 5a, 5b baffle plate 6, 6a, 6b, 6c tube support plate 7 Extra-tubular fluid inlet pipe 8 Extra-tubular fluid outlet pipe 9 Internal fluid inlet pipe 10 Internal fluid outlet pipe 11 Extravascular fluid 12 Fluid in pipe 13 slit 14 Closing board

Claims (1)

[Scope of utility model registration request] Claim 1: In a heat exchanger in which a plurality of heat transfer tubes are arranged in a fluid flow path, an outer peripheral portion of a baffle plate that forms a flow path for a fluid outside the tubes or a tube support plate that supports the heat transfer tubes. A heat exchanger characterized by having a slit facing inward.