DE3035199C2 - Thermal insulation of pipe elbows - Google Patents

Description

The invention relates to thermal insulation of pipe elbows according to the preamble of the claim 1.

Such thermal insulation is known from practice. The protective jacket consists of two half-shells, which overlap each other at the outer arch envelope line and at the inner arch envelope line, wherein in the area of the middle of the outer curve jacket line both half-shells through one punched out on one half-shell Lobes are connected to each other. Over this flap are the two outer shells in the manner of a Hinge.: »Connected to each other. This ensures that when it is placed on an elbow these two outer shells cannot be moved relative to one another. Since starting with the isolation first the outer protective jacket is opened by hand and the two insulating half-shells are inserted have to, but there is always the risk that the internal Insulating half-shells are shifted relative to one another, with the result that the end faces with an insulating half-shell not necessary with the corresponding end faces of the other insulating half-shell! " stand flush. Whether the end faces are flush or not cannot be checked from the outside either, because the material of the protective jacket is mostly opaque. This in turn can lead to between the End faces of a pair of insulating half shells and the end faces of the adjoining insulating half shells of a straight pipe section, empty spaces and thus cold bridges arise, as the insulating effect of the protective jacket is relatively low.

Since three separate components have to be brought together for the insulation, it turns out In this respect, the isolation itself is expensive.

The problems discussed above only occur with the insulation of pipe elbows, but not of straight pipeline pieces, as are known for the latter pairs of insulating half-shells that are attached to the one The dividing line are connected to one another by a hinge strip. Often the insulating semi-. Shell pairs for straight pipe sections already - provided with a laminated outer protective jacket, so that no problems due to a relative displacement can occur between the protective jacket and the pair of insulating half-shells. For pipe bends on the other hand, no technical solution is yet known which would solve the above-mentioned problems can be solved in an impeccable manner, without this an excessively careful work and the corresponding Requires time on the part of an insulation trade.

The object of the invention is therefore to provide a shift in thermal insulation of the known type to prevent the insulating half-shells against each other and against the protective jacket.

This is achieved through the in the identifying part

ίο of the claim specified features.

Due to the one-piece connection of the two insulating half-shells at the specified point on the outer apex it is achieved that the insulating half-shell pair within the protective jacket together with the latter apart without any relative displacement and after being pushed onto a pipe elbow can also be closed again.

The flush of the two faces of the insulating half-shell pair is always guaranteed. The protection against relative displacement of the insulating half-shell pair compared to the surrounding sheathing by means of a plug stifies can already be used in the industrial Prefabrication takes place, with the pin being pierced radially from the outside through the protective jacket and penetrates the hinge web of the insulating half-shell pair. This pin can when opened of the protective jacket and the pair of insulating half-shells contained therein cannot be torn out.

The invention is explained in more detail below using the drawing. It shows

F i g. 1 shows an exemplary embodiment of a pair of insulating half-shells in the fully unfolded state without protective cover, in plan view of the later common axial half-shell contact surfaces.

F i g. 2 shows a section along the line II-II of FIG. 1,

F i g. 3 the pair of insulating half-shells from FIG. 1 in the collapsed state, ie in the position of use, in conjunction with an outer protective jacket, in plan view of the plane of curvature, wherein the protective sheath is illustrated esch itten in the plane of curvature _D.

4 shows the pair of insulating half-shells from FIGS. 1-3 in Connection with the protective jacket in a way that is sufficient to slide onto a pipe elbow partially unfolded state in a perspective view approximately parallel to the axis of curvature.

The insulating half-shells 1, Γ shown in Fig. 1 have a conventional profile and can be used on pipe bends of various types. The peculiarity of the illustrated pair of insulating half-shells is that both insulating half-shells 1, Γ at their two outer apices as well as there in the area of a later outer half-shell contact plane ( ^{coinciding with the plane of the paper in the illustration of FIG. 1} ) in one piece by a thin hinge web 2 are connected to each other.

The pair of insulating half-shells 1, Γ is already inserted into a protective jacket 3 (FIGS. 3 and 4) during industrial prefabrication. To a? Prevent rotation of the protective jacket 3 relative to the pair of insulating half-shells I, Γ about the common axis of curvature / u .

i will - possibly already during the industrial prefabrication - a pin'4 passed through the apex of the protective jacket 3 and the hinge web 2.

Common materials are used for production. Polyurethane foam can be used for the pair of insulating half shells 1, Γ or - preferably - polyethylene foam can also be used. For the protective jacket 3 is on

best, as has been the norm up to now, polyvinyl chloride film used. However, the invention is not subject to any restrictions with regard to the choice of material.

1 sheet of drawings

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Claims (1)

Claim: Thermal insulation of pipe elbows from a hinged outer protective jacket made of elastic plastic film and a pair of insulating half-shells made of foam, characterized in that the insulating half-shells (I ₁ 1 ') are connected to one another at their respective outer vertices in the area of their contact plane by a thin hinge web (2) and that the Insulating half-shell pair (I ₁ Y) is fixed at least in the installed state inside the protective jacket (3) by a pin (4) which penetrates the protective jacket (3) and the hinge web (2) from the outside.