DD215386A1 - END OF TUBE FOR TUBE BELT WASHER - Google Patents

Abstract

The end floor for Rohrbuendel-Waermeuebertrager is intended for use in air and climate control, especially in the field of heat recovery. The aim of the invention is to save high-alloyed steels, to expand the range of application for tubular belt heat transfer media in aggressive media and to shorten assembly and repair times. According to the invention, the object is achieved by the use of specially designed, elastic and corrosion-resistant plate materials.

Description

Title of the invention

End floor for tube bundle heat exchanger

Field of application of the invention

The end floor for shell and tube heat exchangers is used in air and climate technology in the heat transfer between gaseous media, in particular for heat recovery from the port air aeration systems ,,

Characteristic of the known technical solutions ,

It is known to use tube heat exchangers to recover heat using a plurality of parallel tubes (e.g., glass) which are mounted as bundles between suitable holders.

In known types of heat exchangers, the tubes are inserted in bores of two opposing metal plates. "

The sealing of the pipe penetrations in these end floors is

~~ follows according to the type of material in steel pipes, e.g. by welding or rolling. *

When using glass tubes, the locking of the individual tubes in holes provided, which are slightly larger than the outer diameter. By casting with a plastic mass, e.g. Silicone rubber achieves an elastic connection between the tubular elements and the end floors. It is also known to use elastic sleeves.

1QM1933 * 095856

The use of sealing collars requires a great deal of effort when mounting the pipes, since both pipe ends of this kind must be fastened in the end floors. However, the replacement of individual pipes is relatively simple

possible ·,>

When pouring pipe ends into the end floors, replacing single pipes requires a great deal of effort. • The removal of defective pipes and re-sealing requires free access to both sides of the heat exchanger, which should already be considered when designing a system Positioning a heat exchanger with horizontally positioned pipes is no longer possible with a new potting with self-leveling plastic compound. A special adhesive technology must be used, or the heat exchanger must be placed in a suitable position for repair ».

Both variants have in common the use of metallic end bottoms as carrying elements of the tubes

 Since glass tube heat exchangers are used especially in systems with aggressive components in a gas flow, the end base must be made of corrosion-resistant, high-alloy steel. · This effort is unreasonable in many technical applications «Moreover, due to the relatively high rigidity of the

In the case of glass tube heat exchangers, the risk of fracture damage during transport or assembly is disclosed in DE OS 2610 817 and its addition OS 2734 958, which discloses a method for producing tube heat exchangers in which the tube ends are provided with a plastic mass in a detachable form. 'are poured, which then forms the end floor, without the use of a metal support plate.

In this construction, however, the replacement of individual tubes is particularly problematic because their dissolution affects the stability of the entire end floor »

Object of the invention

The aim of the invention is to develop end plates of tube bundle heat exchangers, which are suitable for use in aggressive media, enable short assembly and repair times, and lead to material savings in high-alloy steels.

Explanation of the essence of the invention

The object of the invention is to provide for tube bundle heat exchanger usable end floors, the attachment of the tubes should be made without additional sealing elements or bonds and the replacement of individual tubes is easily and without tools possible. The end floors must be formed corrosion resistant and vibration damping, according to the invention the object is achieved in that in an enclosure or frame of a heat exchanger at the inlet and outlet of an end floor of elastic plate material, such as a technical rubber plate is attached. The attachment of the plate material is expediently carried out on its entire circumference, with jamming or screwing on the most easy to assemble are "bonds are also feasible. The Bndboden invention has circular sections whose distances must be defined depending on the pipe diameter used, or are dependent on the capacity of the heat exchanger. The thickness of the plate material is chosen so that a sufficient stability of the entire heat exchanger is placed, wherein it must preferably be ^73-1 / 6 of the pipe diameter ·

The holder and fixation of the individual pipe elements takes place in the designated circular cutouts whose diameter is about 1 to 2 mm lower than that of the tubes. This ensures that a corresponding tightness is ensured between the tubes and the end chamber, without any additional effort of sealing collars or adhesive substances. It is a simple and quick replacement of individual tubes from this clamp connection possible *

The elastic end floor ensures at the same time a stress-free installation of the heat exchanger in the sewer pipes. "In addition, the use of rubber materials enables the use of the heat exchanger in aggressive media without the occurrence of corrosive effects.

"Design"

The invention will be explained in the following exemplary embodiment:

Pig «, 1: Section through a shell-and-tube heat exchanger The basic structure of the shell-and-tube heat exchanger is formed by a frame 1 of steel or aluminum." Expediently, profiled materials are used to ensure the required stability of the basic structure. The attachment of the individual frame profiles is done in a conventional manner by releasable connections or welds.

The prefabricated, perforated end bottoms 3 made of elastic plate material are introduced into the basic structure, their attachment taking place between the channel sections 5 or other connecting frames by means of screw connections 6.

/ The number, length and diameter of the tubes 2 are determined by the required performance parameters of the heat exchanger. They are introduced into the circular cutouts of the end floor 3, whereby the smaller diameters of the circular

'0 cuts the larger diameter of the pipe elements 2 jam, so that a small bulge 7 is formed, which ^: the tightness between the tubes 2 and the end floors 3 guaranteed. The distances between the tubes 2 are dependent on the material and on the optimum performance parameters of the tube bundle heat exchanger. For repairs or maintenance, the tubes 2 can be changed quickly and easily. "Manufactured heat exchangers are due to the vibration dampening and stress relieving ^ the Endbodenausführung much less sensitive to vibrations and material, assembly or transport-induced stresses than other embodiments", - ^s · '· _v ., ·

Claims (2)

Erfindungsanspruoh 1. Endbpden for shell-and-tube heat exchanger for holding and fixing individual pipe elements respectively at their ends, in which the holder and fixing takes place without special sealing collars or adhesive bonds, characterized in that the material of the end plate of an elastic, stress-absorbing and corrosion-resistant plate material (as it represents, for example, rubber), whose material thickness is preferably from ¹ / 3W to ^1/6 of the pipe diameter and the circular cutouts is for receiving the tubes about 1 to 2 mm less than that of the tubes, 'wherein the distances of the sectors are determined by the desired performance parameters · 2. End base for tube bundle heat exchanger according to point 1 · characterized in that the attachment of the plate material in or, takes place at the housing of the tube bundle heat exchanger on its entire circumference, preferably clamps or fittings are used.