CZ300423B6 - Pipe bracket of underground heat exchanger - Google Patents

Abstract

The present invention relates to a pipe bracket of an underground heat exchanger being located on a pipe (1) return arc (11), wherein a pipe (1) socket (13) is performed on the arc top. A plug (3) containing a support (31) is fastened in a bush (2) closing the pipe (1) socket (13).

Description

Underground heat exchanger pipe hanger

Technical field 5

The invention relates to a pipe suspension of an underground heat exchanger located on a pipe return arc. The hinge is used to fasten weights that facilitate the installation of the pipe and stabilize its position.

BACKGROUND OF THE INVENTION

Underground heat exchangers known for heat pumps belong to the category of the least environmentally friendly heat energy sources, especially in connection with the use of natural heat - geothermal energy - obtained through underground heat exchangers. These exchangers include a set of tubes containing U-shaped probes intended for vertical embedding into the ground, from which geothermal energy is extracted and through which the cooled heat transfer medium is conveyed underground and returned to the heated object after heating.

The probes are provided with a hinge at the location of the return curve of the U-shaped tube, i.e., at the point where the flow of the medium turns 180 ° and returns to the heated object, for fixing a stabilizing weight. This weight facilitates proper probe installation and handling. To fix the weight, the pipe must be fitted with a suitable suspension at its return curve.

According to Swiss patent CH 687268, the hinge is in the form of a bracket provided with an eye for the hinge, either extruded simultaneously with the one-piece polyethylene pipe or manufactured separately and glued to the pipe. The first embodiment requires an expensive and complicated mold and is very difficult to implement since in the second operation the thermoformable tube needs to be subsequently blown in the mold. The second embodiment requires separate production of the bracket, for example by injection molding and then gluing it to the tube. Since the contact surfaces are not flat, but consist of two cylindrical surfaces arranged perpendicular to each other, this method also appears complicated, costly and demanding in order to ensure reliable and sufficient strength of the surfaces to be bonded.

SUMMARY OF THE INVENTION The object of the invention is to provide a pipe suspension which is simple to manufacture and ensures reliable bonding of conventional surfaces to be bonded.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The hinge of an underground heat exchanger tube disposed on the return arc of the tube is that the tube has a neck at the top of the arc in which the sleeve closing the neck of the tube is fixed and a plug containing a beam is fastened therein.

Further possible embodiments of the hinge device are described which advantageously develop its essential features or suitably specify these features.

Reinforcing ribs are provided between the tube body and the protruding end of the neck.

The bottom of the sleeve facing the inner space of the tube is provided with a recess whose shape corresponds to the warped cylindrical surface of the inner wall of the tube in a return arc. The stopper beam is provided with at least one opening.

In the bottom of the housing there is an opening opening into the space between the plug and the housing.

-1 CZ 300423 B6

The reinforcing ribs extend beyond the outer contour of the tube.

The advantage of the hinge according to the invention is the ease of manufacture and reliable assembly of the entire device. Only the parts of the hinge - throat and possibly reinforcing ribs - which do not require a complicated mold and guarantee the quality of a molded part are produced by extrusion together with the arch. The ribs also serve as a measure against material abrasion from the pipe walls when applied to a well. The other two parts - the sleeve and the plug with the holder have a simple shape and their production is also undemanding. The glued or welded surfaces are large enough to ensure a secure connection. In addition, the space between the bottom of the housing and the plug can be used as a sludge compartment.

Overview of the drawings

An exemplary embodiment of the invention is schematically shown in the accompanying drawing. In the drawing it means:

Fig. 1 - axial section of the return pipe of an underground heat exchanger tube with a hinge Fig. 2 - side view of the return arc according to Fig. 1 Fig. 3 - plan view from the inside of the pipe on the housing

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a part of the return curve 11 of an underground heat exchanger tube 1 provided with a weight hinge. The return arc 11 is connected to the heat exchanger inlet and outlet pipes of the heat transfer medium (not shown). The connection to the terminals can be carried out either by polyfusion welding, wherein the return arc 11 has widened ends for inserting the insertion of the terminal or by butt welding or electro-fitting. On the return arc JJ. The tube 13 is formed by a neck 13, the projecting portion of which is additionally connected to the wall of the tube 1 by reinforcing ribs 12 which also serves as a measure against abrasion of material from the walls of the tube 1 when applied to a borehole. For this purpose, the ribs 12 slightly overlap the contour of the pipe 1. A blind sleeve 2 with a bottom 21 is glued or welded to the neck 13 with the bottom 21 of the bottom. the complementary inner wall of the tube 1 is provided with a recess 22, the shape of which corresponds to the warped cylindrical surface of the inner wall of the tube 1 in the return arc 11. In the embodiment shown, a sludge opening 23 is provided in the bottom 21 opening into the space formed by the inner wall of the casing 2. A plug 3 is glued or welded into the casing 2, provided with a shoulder 31 adjoining the beam 32. for hanging the required weight not shown in the drawing. Weights are used to install and stabilize the position of the pipe in the borehole.

Various types of high-pressure polyethylene can be used as the hinge material, for example, designated as standard PE 100, PE 80, PE 63. The neck 13 and the ribs 12 are made in one piece by extrusion together with a return arc. The neck 13 and the plug 3 are molded separately in separate molds. Individual parts can be joined by gluing or by polyfusion welding.

Industrial applicability

The pipe clamp according to the invention can be used on all return bores intended to be buried and made preferably of plastic.

Claims (6)

PATENT CLAIMS An underground heat exchanger tube hinge disposed on a return pipe of a tube, characterized in that the tube (1) has a neck (13) at the top of the arc in which the sleeve (2) closing the neck (13) of the pipe (I) is fixed. in which a plug (3) comprising a beam (32) is fastened. Pipe weight hinge according to claim 1, characterized in that reinforcing ribs (12) are provided between the tube body (1) and the protruding end of the neck (13). Pipe weight hinge according to claim 1 or 2, characterized in that the bottom (21) 15 of the housing (2) facing the interior of the pipe (1) is provided with a recess (22) whose shape corresponds to the warped cylindrical surface of the pipe inner wall. (1) in the return arc (11). Pipe weight hinge according to any one of claims 1 to 3, characterized in that the support (32) of the plug (3) is provided with at least one opening (33). Pipe weight hinge according to any one of claims 1 to 4, characterized in that an opening opening into the space between the plug (3) and the housing (2) is provided in the bottom of the housing (2). Pipe weight hinge according to any one of claims 1 to 5, characterized in that the reinforcing ribs (12) extend beyond the outer contour of the pipe (1).