METHOD OF INJECTING POLYURETHANE IN PRE-INSULATED PIPES AT THE POINTS OF JOINING WITH FITTINGS

Abstract

The invention relates to a method of injecting polyurethane, where the contents of two cylinders (2) of polyol and isocyanate are mixed in a static mixer (3). The mixed amount of polyurethane is injected with a gun (1) into a hole and at the appropriate points for joining the fittings. The injection can be done in horizontal hanging lines that run through the roof, in vertical columns, but also in any other case as judged by the applying person.

Claims

1. A method of injecting polyurethane into pre-insulated tubes at joints with fittings, where the contents of two cylinders (2) of isocyanate and polyol are mixed in a static mixer (3), characterized in that the resulting polyurethane is injected through a gun (1) into holes for joining pre-insulated pipes with fittings.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The invention will become apparent to those skilled in the art with reference to the accompanying drawings in which it is illustrated in a non-limiting manner.

[0011] FIG. 1 shows a side view of the gun used to apply the injection method.

[0012] FIG. 2 shows in perspective view the pistol with the pair of cylinders used in the present method.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

[0013] Referring now to the accompanying drawings, we will describe illustrative embodiments of the polyurethane injection method in pre-insulated pipes at the joints with fittings.

[0014] The method is carried out with a gun (1), FIG. 1, having a pair of cylinders (2) and a static mixer (3), FIG. 2. An equal amount of polyol and isocyanate is placed in each bottle (2) of the gun (1). Each cylinder (2) has a dosing scale for proper adjustment. The static mixer (3) ensures the mixing of the two components and the geometry of the static mixer (3) helps to make injections in difficult areas. The polyurethane, resulting from the mixing of polyol and isocyanate, is applied in the hole, taking care that the level of the scale of the pair of cylinders (2) reaches the corresponding marking.

[0015] It should be noted at this point that the description of the invention has been made with reference to non-limiting embodiments. Therefore, any change or modification in terms of shape, dimensions, morphology, materials used and components of construction and assembly, as long as they are not a new inventive step and do not contribute to the technical development of the already known are considered to be contained in the purposes and aspirations of the present invention.