NL8304479A - DEVICE FOR CLOSING A RING-SHAPED SPACE ON THE FRONT. - Google Patents

Description

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VO 5330 I.

Title: Device for closing an annular space at the front side. j

The invention relates to a device for the front side 1

closing of a concentric placement of a core house within I.

a casing tube formed annular space filled with insulating material. 1 5 It is known to insulate a pipe through which a medium flows through], the pipe as a core housing concentrically within a jacket pipe 1

and through the outside of the core body and the inside I

annular space bounded by the casing with insulating material I.

for example polyurethane heart foam. To prevent, I

10 that, for example, with pipes laid in the ground, groundwater in the ring

space penetrates through which the action of the insulating material

disadvantaged or even the insulating material would be renewed, it is necessary, the front sides of the ring filled with insulating material I

shaped space. For this purpose it is known to use so-called thermoplastic shrink sleeves, which have a processing temperature I.

above 100 ° C. On the construction site it is at the right I.

Incorporating such crimp cuffs in such a manner is complicated and can be made more difficult by weather influences. On-site seals of the annular space do not, however, make additional sealing work under local conditions unavoidable, because often standard pipe lengths sealed on site due to a high temperature

change of direction or branches in the pipe run at the location I.

destination must be shortened. In addition, the data | conventional thermoplastic shrink caps at a core temperature of more than 60-80 ° C soften and thus the sealing effect considerably

is reduced. I

The invention is based on the problem, a device I.

for closing annular spaces between one end at the front. I

core housing and a casing which is also provided under local I

30 conditions can be easily built in and allows an absolutely watertight and temperature-resistant seal.

According to the invention, an annular disc is proposed to solve the problem posed, one of which is attached to the 8304479-2-f. <* outer diameter of the core housing inner bore and of the outer diameter resp. the inner diameter of the casing tube is provided with various cylindrical parts, the part of which is adapted to the inner diameter of the casing tube is subdivided by an annular groove.

The annular disc according to the invention can simply be slid on the core housing on the basis of shape and pressed into the casing tube in this way, and thus glued to the tube, whereby an absolutely watertight closure of the annular space 10 is achieved. The sealing effect is additionally improved by a sealing ring arranged in the annular groove of the partial cross-section adapted to the inner diameter of the jacket pipe.

According to an embodiment of the invention, the inner bore of the annular disc is conical, and the maximum diameter of the inner bore lies on the side of the annular disc facing the annular space.

As a result of this embodiment, the annular disk acts as a scraper ring when pushed onto the core housing and an adhesive collar can be formed within the cone of the inner bore from the adhesive 20 previously applied to the core housing, which ensures a complete seal between the core housing and the annular disk. .

Finally, according to the invention, it is further proposed that the annular disc consists of glass fiber reinforced duroplastic reaction resin.

An annular disc made of glass fiber-reinforced reaction resin has excellent manufacturing properties and also has the same resistance in ground pipes as the core and jacket pipe, preferably made of the same material, and has the necessary resistance to temperature.

The drawing shows an exemplary embodiment of a device according to the invention. In the drawing: Fig. 1 shows an annular disc in cross section; Fig. 2 shows, on a reduced scale, the annular disc according to Fig. 1, in connection with partly broken-away core-35 and casing for reaching the closing position, and 8304479. Fig. 3 shows the annular disc in communication with the tubes in the closed state.

An annular disc 1 is provided with a conical inner bore 2, which is adapted to the outer diameter of a core tube 3.

The annular disc 1 has two cylindrical parts 4 and 5 different in diameter, the cylindrical part 4 of which is adapted to the inner diameter of a jacket pipe 6 and the cylindrical part 5 to the outer diameter of the jacket pipe 6. The cylindrical part 5 is divided by an annular groove 7.

As shown in Figs. 2 and 3, the core housing 3 sits concentrically in the jacket pipe 6 and thus forms an annular space filled with polyurethane heart foam 8.

The annular disc 1 is provided with an adhesive layer over the area of the inner bore 2 as well as on the side facing the annular space, which layer comes to lie against the polyurethane foam, as soon as the annular disc 1 has the position shown in fig. 3. reached. A sealing cord 9 previously laid in the annular space 7 supports the sealing action between the annular. disc 1 and the jacket pipe 6.

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Claims (3)

Device for closing on the front side of an annular space filled with insulating material formed by the concentric placement of a core housing within a casing tube, characterized by an annular disc (1) with an outer diameter of the core housing 5 (3) adapted inner bore (2) and with the outer diameter resp. the inner diameter of the casing (6) with distinct cylindrical parts (4,5), the part of which (4) adapted to the inner diameter of the casing (6) is divided by an annular groove (7). is. Device according to claim 1, characterized in that the inner bore (2) of the annular disc (1) is conical and the maximum diameter of the inner bore (2) on the side of the annular disc facing the annular space (1). Device according to claims 1 and 2, characterized in that the annular disc (1) consists of glass fiber reinforced duroplastic reaction resin. 830 479