DE2910983A1 - Removable expansion-compensating pipe insulation - has concentric tubular layers of insulation with facility for longitudinal movement - Google Patents

Abstract

Along a short length of a pipe (1), the insulation is provided by a succession of concentric tubes (3). These consist of a sleeve (4), with insulating material (5) bonded to its inner face. An air-gap (6) is left between each tube. One end of each tube is fixed at one side or the other alternately to a closing perforated disc (8). The other ends finish short, leaving a gap between them and the discs (8), to allow for expansion of the pipe (1). Clamping rings (9) hold each end of the assembly to the neighbouring solid insulation.

Description

Removable insulation compensator

The invention relates to a removable insulation compensator for insulation of apparatus, in particular of pipelines.

In the case of pipelines and tanks, in some cases, in particular at nuclear power plants, the weld seams are checked at certain time intervals will. For this it is necessary to remove any insulation.

Insulations made of insulating mats are known, each in place be sewn.

The manual effort is both in attaching and removing the insulation is very great. Next is on with every check with high losses Material to be expected, so that in the case of insulation that is removed more often for control reasons this method is uneconomical.

Insulations with shells are also known in which the because of different thermal expansion coefficients of pipe and shell required Length compensation for temperature fluctuations through a wider shell joint bridging insulating cap is added.

The disadvantage of this design is that the installation cross-section in The area of the length compensation increases by twice the insulation thickness. In general Such a solution is unsuitable in tight spaces, e.g. in power plants.

The object of the invention is to find removable thermal insulation, the different expansions between the insulating material caused by temperature increases and the apparatus and despite the same external dimensions as the rest of the insulation has approximately the same insulation value.

The object is achieved in that several, from self-supporting parts composed, closed insulating shells stepped Size are nested below one another with a small gap, with the end faces of the insulating shells on the apparatus encompassing two sections arranged on both sides Discs are alternately anchored or assigned with expansion spacing and that the sections of each disc are interconnected by elements.

Due to the multiple interlocking insulating shells and the interconnection a high level of thermal insulation is achieved by thin layers of air. Simultaneously takes the compensator of thermal expansion of the pipelines at a technically intended and manageable position.

There are thermally unfavorable gap formations in the actual Insulating jacket and heavy loads on the insulating material are avoided. Further dimensional inaccuracies that arise during construction can be eliminated by the Compensator. Also is that Assembly or disassembly much easier because the parts can be prefabricated in the factory and a corresponding gradation of the individual parts a sectional structure of the Allow compensators.

In a special design, the longitudinal joints of two adjacent, closed insulating shells offset against each other.

By offsetting the joints between the parts of a closed If the insulation shell is of course not completely airtight, it is avoided that a tight heat short circuit can arise between the device and the outer surface, In a further version, the insulating shell consists of thin walls between where there is an insulating material with low heat conduction.

The encasing of the insulating material is enclosed on all sides On the one hand, thin plate allows the use of high-quality, granular cut materials with extremely low thermal conductivity and on the other hand fulfills the condition after Freedom from dust, as required, for example, in nuclear power plants.

An Ausftllirungsbeispiel the invention is shown in the drawing and is described in more detail below.

It shows Figure 1 side view with partial section of the compensator, Figure 2 cross section through compensator and pipe.

In Fig. 1 and 2 are composed of parts 2 ring-shaped around a tube Insulating shells 3, which consist of wall 4 with insulating material 5, with intermediate layers shown from air 6. The end faces 7 of the insulating shells 3 are alternating anchored in halved perforated disks on one side, while on the other Side a distance to the second halved perforated disk 8 for a longitudinal extension of the pipe 1 own. The sections of the perforated disk 8 are held together by elements which consist of clamping ring 9 and turnbuckle 10. Is at the same time; in the tension ring 9 a stable cover plate 11 is slidably mounted.

Blank page

Claims (1)

Patent claims: (1. Removable insulation compensator for insulation of apparatus, in particular of pipelines, characterized in that several closed insulating shells composed of self-supporting parts (2) graduated size with a small gap (6) are connected to each other, wherein the end faces (7) of the insulating shells ()) on the apparatus (1) encompassing sections two disks (8) arranged on both sides alternately anchored or with expansion spacing are assigned and that the sections of each disc (8) by elements (9, 10) are interconnected. 2. Removable insulation compensator according to claim 1, characterized in that that the longitudinal joints of two adjacent closed insulating shells (3) against each other are offset. 5. Removable Därr compensator according to claim 1 and 2, characterized in that that the insulating shells consist of thin walls (4), between which there is an insulating material (5) with low heat conduction is located.