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Folded-seam connection, method and device for producing it

A connecting piece and corrugation technology, applied in the field of a method and a device for implementing the method, can solve the problems of high cost of materials, etc., and achieve the effects of compensating for thermal expansion and vibration, strong spring action, and increasing leakage

Inactive Publication Date: 2006-01-25
SPIRO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This gives rise to additional disadvantages: its effectiveness mainly depends on the conscientiousness of the user (worker) because of the higher expense of the material and the time required to introduce additional sealing material into the folded seam connection

Method used

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  • Folded-seam connection, method and device for producing it
  • Folded-seam connection, method and device for producing it
  • Folded-seam connection, method and device for producing it

Examples

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Embodiment Construction

[0035] Figure 1 shows a coil of galvanized metal sheets S1 and S2, commonly called "spiral", which are connected to each other by elbow sections s2 to s5. Elbow sections s2 to s5 are connected to pipes S1 and S2 by common detachable connectors V. The connecting elbows s2 to s5 have a bead W which is used for reinforcement and also as a limit stop. The actual folded seam connection of the invention is denoted A; the middle line of the pipe connection is denoted m and corresponds to the centreline.

[0036]The folded seam connector A is shown in FIG. 2 in an enlarged cross-sectional view. Also shown here are intermediate bend sections s3 and s4 with a first pipe end X and a second pipe end Y. There is also a deflecting portion 5 in a constricted shape here. The first pipe end X terminates in a flange-like double fold 1, while its flange parts 1a and 1b together form a flange joint. An air gap 3 is formed between the flange parts 1 a and 1 b , which itself acts as an expansio...

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Abstract

In ventilation and air-conditioning technology, so-called spiral pipes have to be joined together in a tightly sealed manner at widely differing angles, which is generally carried out by segment bends and pipe sections. An improved, durable seal of folded-seam connections is achieved by a flange-like double fold which is arranged at a first pipe end (X) and which is surrounded on the outside at least in part with positive locking and with a continuous metal seal, by a second double fold at the second pipe end (Y). The subject of the invention also extends to an economic method of producing the flange-like double fold as well as to a device suitable therefore for performing the method.

Description

technical field [0001] The present invention relates to a folded seam connection for forming a high degree of airtightness between two ductile duct sections conveying an air flow, a method for its manufacture and a device for carrying out the method. Background technique [0002] Folded seam connections are already known in ventilation and air-conditioning technology for forming a highly airtight connection between two ductile metal pipe sections conveying an air flow. An inherent disadvantage of these connections is that they are not airtight, as any folded seam connection will spring back, ie open, after it has been made. However, the leakage losses caused by this type of connection are generally unacceptable in terms of hygiene, health and / or energy, so that additional work is required for sealing, for example, inserting rubber strips and / or fixing the joint by gluing. Folded seam connectors; of which, WO00 / 27557 Figure 10 Various methods of holding the seal are shown t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D39/04B21D19/04B21D39/02
CPCB21D19/046B21D39/04Y10T29/49918Y10T29/53791B21D19/04
Inventor 鲁道夫·宾格利
Owner SPIRO