JPS6222791Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tube bundle support device for shell-side longitudinal flow heat exchangers among shell-and-tube heat exchangers.

In general, heat exchangers that use fin tubes with a large number of fins on the outer circumference in the longitudinal direction do not have a buttful plate due to their structure, and the fin tubes must be pulled out from the shell for maintenance, inspection, repair, etc. After completing this work, it is necessary to further install the fin tube, but this operation is not easy.

Conventionally, a specially processed tube was wrapped around the tube bundle.
It was used to prevent bypass flow and support the tube bundle of the longitudinal flow heat exchanger on the body side, but since the shapes were different,
The cost was high and they were at a financial disadvantage.

This invention was made for the purpose of eliminating these conventional problems, and will be explained below based on the embodiments shown in the drawings.

1 and 2 are shells with a two-part structure, which are combined into a cylindrical shape via bolts 5 to cover the base end of the fin tube 3 so as to tighten the tube bundle attached to the tube plate 4; It is removably attached to the tube plate 4 by the formed fixing flange 6.

A plurality of brim-shaped reflux prevention plates 7 are provided on the outer periphery of each shell 1 and 2 at arbitrary intervals, and a tube plate 4 is attached to the other end of the fin tube 3, that is, the tip on the insertion side. ' is made to have approximately the same diameter as this reflux prevention plate 7.

The halved shells 1 and 2 combined in this way are
It is housed in a cylinder 8. The tube sheet 4 can then be attached to the cylinder 8. In addition, the inner circumferential surface of the cylinder end and the tube plate 4'
It is configured to be sealed by a seal 9 inserted between the outer peripheral surface of the cylinder 8 and a seal presser 10 that presses the seal 9, and also formed between the cylinder 8 and the shells 1 and 2. The air gap is configured to suppress air reflux by a reflux prevention plate 7, guide the air in the longitudinal direction of the fin tube 3, and promote thermal efficiency.

As described above, in the present invention, a tube bundle is housed in a shell 1 divided into two parts, and a plurality of brim-like reflux prevention plates 7 are provided on the outer periphery of the shell 1 at predetermined intervals. The outer circumferential surface of the cylinder 8 and the outer circumferential surface of another tube plate 4' provided at the insertion end of the tube bundle are made smaller than the inner circumferential surface of the cylinder 8, so that it is difficult to use the seal presser during maintenance, inspection, disassembly and repair, etc. 10, the fin tube 3 can be easily removed and inserted with the tube plate 4' attached to the tip, and the fin tube 3 can be easily removed and inserted.
Even if the tube bundle is pulled out from the cylinder 8, the shell 1 is covered with a lid to tighten the tube bundle, and the reflux prevention plate 7, which also serves as a reinforcing member, is attached to the outer periphery of the shell 1, so that the shell 1 itself does not bend. Deformation does not occur and the fin tube 3 is not damaged.

Furthermore, since the reflux prevention plate 7 prevents the flow of fluid between the cylinder 8 and the shell 1, the passage area of the fluid flowing inside the cylinder 8 decreases, and if the flow rate is constant, the fluid velocity increases accordingly. Since the heat exchange rate increases, the heat exchange efficiency can be improved, and a shell-side longitudinal flow heat exchanger with a simple structure and high efficiency can be provided at a low cost.

Further, the combination of a cylinder and a shell having a two-part structure can be effectively applied as is to a shell-and-tube heat exchanger having a plurality of buttful plates 11 as shown in FIG.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of a body-side longitudinal flow heat exchanger using finned tubes to which the present invention is applied, and Figure 2 is a 2
A side sectional view of the split shell, Figure 3 is a front sectional view, Figure 4 is a sectional view taken from A to A in Figure 2, Figure 5 is a detailed sectional view of section B in Figure 1, and Figure 6 is a front sectional view. FIG. 2 is a side sectional view of a multi-tubular heat exchanger using a buff-full plate to which the invention is applied. 1, 2...split shell, 3...fin tube, 4,
4'... Tube plate, 5... Bolt, 6... Fixing flange, 7... Reflux prevention plate, 8... Cylinder, 9
... Seal, 10 ... Seal presser, 11 ...
Batsuful plate.

Claims (1)

[Scope of utility model registration request] It consists of a combination of a two-part shell that covers the tube bundle so as to tighten it, and a cylinder to which the tube plate on the proximal end can be attached and detached. A reflux prevention plate is provided, and the outer peripheral surface of the reflux prevention plate and another tube plate provided at the insertion side tip of the tube bundle is formed to be smaller than the inner peripheral surface of the cylinder. Heat exchanger tube bundle support device.