JPH04138576U - Heat exchanger - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] To avoid narrowing the flow path of the primary coolant in the heat exchanger, not to damage the upper connecting pipe, and to eliminate the need for convergence of the upper connecting pipe. . [Structure] A plurality of support beams 16 are provided radially arranged in a direction perpendicular to the 4-axis axis of the inner cylinder, and a plurality of support plates 17 formed by bending thin plates in the thickness direction to create a predetermined difference in diameter are attached to the support beams. A plurality of tubes are disposed concentrically with the inner cylinder 4 on the upper connecting tube 16 and can be loosely fitted onto the upper connecting tube 9 by passing the upper connecting tube 9 along each support plate 17 and at predetermined intervals in the circumferential direction. A sleeve 19 is provided, and the sleeve 19 fitted onto each upper communication pipe 9 is tightened by a presser plate 20, thereby indirectly attaching each upper communication pipe 9 to a predetermined position on the support plate 17. As a result, the inner peripheral surface of the sleeve 19 absorbs the vibration of the upper connecting pipe 9, and the support plate 17 prevents the sleeve 19 from being displaced.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a heat exchanger.

0002

[Conventional technology]

Figure 3 schematically shows an example of a conventional vertical shell-and-tube heat exchanger. 4 is a view taken along IV-IV arrows in FIG. 3, FIG. 5 is a view taken along V-V arrows in FIG. 3, and FIG. FIG. 5 is a perspective view related to the heat exchanger tube support device of No. 5; 1 is outer shell, 2 is inner shell, 3 is inner shell 2 Insulation provided on the inner surface, 4 the inner cylinder, 5 the center pipe, 6 the inner cylinder 4 and the center pipe This is a heat insulating material provided between the pipe 5 and the pipe 5. Secondary coolant inlet chambers 7 are provided at four locations on the top of the outer shell 1. The secondary coolant is connected to the secondary coolant inlet chamber 7 via the low-temperature tube plate 8 and converged into a plurality of coolant. The upper connecting pipe 9 is directed toward the space 10 between the inner cylinder 4 and the heat insulating material 3 on the inner surface of the inner cylinder 2. The helical coil is formed into a helical coil shape that is easy to take measures against thermal expansion against high temperatures. A coil-shaped heat exchanger tube 11 is connected to the end of the upper connecting tube 9 and placed into the space 10. It is set up.

0003 In addition, in order to limit the vibration of the upper connecting pipe 9 due to fluid vibration, the upper connecting pipe 9 is A slightly larger hole 12 through which the pipe 9 can be inserted is made to fit the arrangement spacing of the converged upper connecting pipe 9. A steady rest plate 13 is provided, which is bored so as to match the steady rest plate 13, and the steady rest plate 13 is attached to the outside of the inner cylinder 4. Fixed around the perimeter. Note that 14 is a flow path forming cylinder that forms a flow path for the primary coolant. , 15 is a secondary coolant outlet nozzle provided at the tip of the center pipe 5 at the top of the outer shell 1. It is.

0004 The secondary coolant (arrow a) fed from the secondary coolant inlet chamber 7 to the upper connecting pipe 9 is Furthermore, while flowing inside the helical coil heat exchanger tube 11, the lower part of the heat exchanger (not shown) of the primary coolant (arrow b) fed into the space 10 from the primary coolant inlet nozzle of It absorbs heat, raises its temperature, and passes through a not-shown heat exchanger tube assembly at the bottom of the center pipe 5. As shown in the figure, the coolant rises inside the center pipe 5 and starts from the secondary coolant outlet nozzle 15 at the top of the outer shell 1. is routed to downstream equipment that is not connected.

[0005]

[Problem that the idea aims to solve]

However, in the heat exchanger described above, the steady rest plate 13 prevents the primary coolant from flowing through the flow path. Because the area is narrowed, pressure loss increases, and the steady rest is made of plate material. , when the fluid-vibrating upper connecting pipe 9 contacts the inner circumference of the hole 12 of the steady rest plate 13, Fretting corrosion is likely to occur on the surface of the upper connecting pipe 9 due to point contact. Align the position of the hole 12 of the steady rest plate 13 with the center of the upper connecting pipe 9. It is difficult to do this, and furthermore, it must be converged to collect the upper connecting pipe 9 on the steady rest plate 13. In addition, there were problems such as the large number of curved pipe parts, which hindered flaw detection inspection inside the pipe. .

[0006] In view of the above-mentioned circumstances, this invention forms the steady rest of the upper connecting pipe with a support plate. This allows fretting corrugation to be applied to the surface of the upper connecting pipe without interfering with the flow of primary coolant. To provide a heat exchanger that is less likely to cause John and does not require convergence of the upper connecting pipe. This was done for the purpose of

[0007]

[Means to solve the problem]

The present invention is arranged at equal intervals along the outer circumference of the inner cylinder and in a direction perpendicular to the axis of the inner cylinder. A plurality of support beams are provided that protrude radially, and the thin plate is bent in the thickness direction to create a predetermined difference in diameter. A plurality of support plates formed so that It communicates with heat transfer tubes arranged along the side surface of the support plate and at predetermined intervals in the circumferential direction. A sleeve that can be loosely fitted onto the upper connecting pipe is attached to the side surface of the support plate, and The connecting pipe is attached to the support plate via a sleeve.

[0008]

[Effect]

The vibration of the upper connecting pipe is suppressed by the inner circumferential surface of the sleeve fitted over the upper connecting pipe. A support plate that receives and fixes the sleeve prevents displacement of the sleeve.

[0009]

【Example】

Embodiments of the present invention will be described below with reference to the drawings.

00010] Figure 1 is a plan view schematically showing the heat exchanger of the present invention, and Figure 2 is a diagram of the heat exchanger tubes related to Figure 1. FIG. 3 is a partially enlarged perspective view of the support device. In the figure, the same parts as shown in Figure 3 have the same symbols. It is numbered.

[0011] The upper connecting pipe 9 arrangement of the heat exchanger has basically the same configuration as the conventional heat exchanger shown in Fig. 3. At the installation part, the grooves are arranged at equal intervals along the outer periphery of the inner cylinder 4 and perpendicular to the axis of the inner cylinder 4. Six support beams 16 with a rectangular cross section are provided that protrude radially in the direction of Three supporting plates 17 are formed so that a predetermined difference in diameter is created by bending them in the opposite direction. a support plate disposed on the support beam 16 concentrically with the inner cylinder 4 and in contact with the support beam 16; A cutout 18 matching the width of the support beam 16 is provided on the lower end surface of the support beam 17. The support plate 17 is fixed on the support beam 16 by fitting the plate 8 onto the upper end of the support beam 16. At predetermined intervals along the inner and outer sides of each support plate 17 and in the circumferential direction. The upper connecting pipe 9 is passed through the upper connecting pipe 9 with an inner diameter slightly larger than the outer diameter of the upper connecting pipe 9 and a predetermined length. A plurality of sleeves 19 having a By a plurality of presser plates 20 bent into a U shape for fixing to the side surface of the support plate 17. , tighten the sleeve 19 fitted over each upper connecting pipe 9, and indirectly connect each upper connecting pipe 9. The pipes 9 are attached to predetermined positions on both the inner and outer sides of the support plate 17, and the vibrating upper connecting pipe 9 is The inner peripheral surface of the sleeve 19 receives this, and the support plate 17 prevents displacement of the sleeve 19. make it stop.

0012 In addition, the support rigidity K of a support beam fixed at both ends is generally expressed by the following formula 1; As is clear from 1, the rigidity can be adjusted by changing the thickness of the support plate 17. Wear.

K=192EI/l ³ =16Ebt/l ³ ...1 where E; modulus of longitudinal elasticity of the material I; moment of inertia l; span b; width t of the member; thickness of the member

[0014] In this embodiment, the deflection of the upper connecting pipe 9 is received by the inner peripheral surface of the sleeve 19. Since it is formed so that it can be stopped, there is no fretting corrosion on the surface of the upper connecting pipe 9. This can be prevented from occurring. In addition, the support plate 1 that supports the sleeve 19 7 is made of a thin steel plate, so there is almost no hindrance to the formation of the primary coolant flow path. Increase in pressure loss can be suppressed. Furthermore, since there is no need for convergence, As a result, flaw detection inside the pipe can be easily carried out.

[0015] Note that the present invention is not limited to the above-mentioned embodiments, and the gist of the present invention is described below. Of course, various changes can be made within the scope.

[0016]

[Effect of the idea]

According to the heat exchanger of the present invention, various excellent effects as described below can be achieved.

[0017] I) So that the vibration of the upper connecting pipe can be absorbed by the inner peripheral surface of the sleeve. Therefore, damage such as fretting corrosion may occur on the upper connecting pipe. Can be prevented.

[0018] II) Since the steady rest support material is made of a thin plate, it is almost impossible to form a flow path for the primary coolant. Therefore, the increase in pressure loss can be suppressed.

[0019] III) Since the upper connecting pipes can be arranged at equal intervals on the support material, there is no need to converge the heat transfer pipes. This eliminates the need for bent pipe sections, and facilitates flaw detection and inspection inside the pipe.

[Brief explanation of drawings]

FIG. 1 is a plan view schematically showing a heat exchanger of the present invention.

FIG. 2 is a partially enlarged perspective view of the heat exchanger tube support device related to FIG. 1;

FIG. 3 is a cross-sectional view schematically showing an example of a conventional vertical shell-and-tube heat exchanger.

FIG. 4 is a view taken along the line IV-IV in FIG. 3;

FIG. 5 is a view taken along the line V-V in FIG. 3;

FIG. 6 is a perspective view related to the heat exchanger tube support device of FIG. 5;

[Explanation of symbols]

4 Inner cylinder 9 Upper connecting pipe 16 Support beam 17 Support plate 19 Sleeve

Claims (1)

[Scope of utility model registration request] Claim 1: A plurality of support beams are provided along the outer circumference of the inner cylinder at equal intervals and protrude radially in a direction perpendicular to the axis of the inner cylinder, and the thin plate is bent in the thickness direction so that a predetermined difference in diameter is achieved. A plurality of support plates formed so as to extend over the support beam are arranged concentrically with the inner cylinder on the support beam, and an upper part communicates with heat exchanger tubes arranged along the side surface of each support plate and at predetermined intervals in the circumferential direction. A heat exchanger characterized in that a sleeve that can be loosely fitted onto the connecting pipe is attached to a side surface of the support plate, and each of the upper connecting pipes is attached to the support plate via the sleeve.