DE2952593A1 - DEVICE FOR PUTTING ROD-SHAPED HEAT EXCHANGERS INTO THE GROUND - Google Patents

Description

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Hermann-Dietrich Moaner v5 23oo Kiel, December 15, 1979 Chaussee 169

Device for the introduction of stone-shaped Heat exchangers in the ground

The innovation relates to a device for introducing rod-shaped Vfcirmetauschern in the soil through holes that can be made using the drilling process.

To use geothermal energy it is known as a heat exchanger to bring serving pipes in 1 - 2 depth horizontally into the ground. Here but considerable lengths of pipeline have to be brought into the ground, this had to be a relatively large area are available to enable use. In addition, it is disadvantageous that in the case of already existing gardens, this occurs when the pipelines are laid in the ground had to be destroyed.

Therefore one is increasingly going over to the pre-exchangers vertically or almost vertically into the earth

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bring rich. For this purpose, so-called rod heat exchangers with a length of approx. 3o - 35 m length known. These heat exchangers usually work in a closed system. A heat transfer medium flows through an inner tube into the heat exchanger and through the free one Ring cross-section between the two pipes taking up the geothermal energy.

The so-called flush drilling method has become known for introducing these rod heat exchangers into the ground. For this purpose, the inner tube was pulled out of the heat exchanger and the tip with it equipped with an open, scooped rinsing head. Constantly turning, this system water is pushed in through the pipe from above. The cuttings flushed free in the borehole escapes now inevitably with the water between the ground and the outer pipe wall upwards and spreads over the earth's surface.

The disadvantage of this method is that the flushing of the cuttings between the ground and the outside Pipe wall a free space is flushed, which leads to poor contact between the two. Even with a subsequent filling up this

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In the open space, cavern formation cannot always be avoided, which inevitably leads to poor heat transfer has the consequence. A further disadvantage is that in already finished gardens by the necessary flushing car or by the cuttings pouring onto the garden, this destroyed will.

The main problem with this method, however, is that it is required to be correct Sealing the pipe at its lower end after it has been buried in the ground.

This is very complex and time-consuming, and the complete seal cannot be checked immediately. Since the pipe is rotated when it is placed in the ground, it had to be torsion-resistant in order to make it torsion-resistant remains to be formed with a correspondingly thick wall thickness, which in turn is a certain additional Inertia of the heat transfer from geothermal energy to the heat transfer medium flowing in the pipe causes.

The object of the innovation * ° ^{r therefore,} an on

to create direction that eliminates the disadvantages and difficulties described. According to the innovation, this task is thereby achieved

solved that the holes can be produced by the ram core probing, and that the rod-shaped heat exchangers are designed as ram core probes at the same time.
According to this device, neither water nor a washing machine is required and, what is particularly important, the heat exchanger which can be used in this way can be closed from the start, so that there are no longer any problems with subsequent sealing.

Since the rod heat exchangers, which are in the Remaining ground, designed at the same time as ram core probes, are no special devices needed which, as usual, have to pull the ram core probes out of the ground.

In an expedient embodiment of the innovation, it is proposed that the rod heat exchanger consist of individual, mutually attachable and connectable parts that the foremost Section is provided with a guide tip, and that on the rear end of the sections An impact head can be detachably attached during the respective impact process by means of an adapter piece is.

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Advantageously, the connecting means of two sections are designed so that in this No thickening of the outside diameter of the rod heat exchanger occurs in the area. That is required for good contact between the ground and the heat exchanger. Otherwise it would be driven in of the rod heat exchanger in the ground according to the thickening the hole is rubbed larger and on the remaining length an air gap would arise, which would result in poor heat transfer would effect.

An expedient embodiment is that for connecting the individual sections to one another the ends of which are designed as independently sealing, conical threaded pieces.

They are usually used for driving in ram core probes mechanical impact devices used. In order to be able to use these impact devices here as well, is proposed in a further embodiment of the innovation that the impact head is designed is that the percussion hammer of a known type of impact device can be connected.

Impact devices are relatively heavy. In order to avoid,

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that they have to be raised to their height by hand each time a new section is set up, it is proposed according to a further development of the innovation that the impact device is a foreseeable mobile mast construction is mounted vertically displaceable in a positive guide, and that a cable winch is provided to lift the impact device vertically.

The mast construction is expediently placed on a holding post that can be driven into the ground put on.

The innovation is explained on the basis of the illustrated embodiment.,

They show: FIG. 1 an overall view of the device
Figure 2 the connecting means of two

Cuts

Figure 3 shows the mast construction according to section a - a

In Figures 1, 2 and 3, the same parts are denoted by the same reference numeral ^ n. In Figure 1 is

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with 1 the rod heat exchanger, consisting of sections 2 and 3, which are connected to one another via the connecting means 4. With 5 is the guide tip and 6 denotes the adapter, by means of which the impact head 7 in each case is attached to the end of the section to be driven. The impact device 8, its impact hammer 9 sits on the impact head 7 is from a vertically movable boom on the mast construction Io 11 held. With a cable winch 12 is designated, the rope 13 over the pulleys 14 and 15 with the impact device 8 is connected. About the retaining post 16, which is rammed into the ground 17, the mast construction Io is held.

In Figure 2, the connecting means 4 are shown in detail. The individual sections of the Rod heat exchangers 1 are at one end with a conical external thread 18 and on the the other side provided with a corresponding conical internal thread 19, so that the individual Sections can each be connected to one another by screwing. This conical training makes it possible that no compression of the sections in this area is necessary and still there is still sufficient strength of the pipe sections to be connected in the notch zones.

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In Figure 3, the mast construction Io is shown according to section a-α. It is formed from two K-shaped frame profiles 2o and 21, in which the boom 11 with its rollers 22 and 23 is movably guided.

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L e r s e i t e

Claims (7)

^ NAC; ! Cr RFJ :. ηTI Hermann-Dietrich Mol, 2her 23oo Kiel, December 15, 1979: Hamburger Chaussee protection claims 1) Device for inserting rod-shaped heat exchangers into the ground, holes which can be produced by a drilling process, characterized in that the holes can be produced by the ram core probing process, and that the rod-shaped heat exchangers (1) are simultaneously designed as ram core probes. 2) Device according to claim 1, characterized in that the rod heat exchanger (1) consist of individual mutually attachable and interconnectable sections (2,3) that the foremost section (2) is provided with a guide tip (5), and that on the rear end of the sections (2, 3) during the respective impact process by means of an adapter piece (6) an impact head (7) can be detached and placed on. 130027/0705 ORIGINAL INSPECTED 3)
'A device according to claims 1 and 2, characterized in that the connecting means (4) of two partial pieces (2,3) are formed so daii no thickening of the AuiJendurchmessers the rod heat exchanger (1) occurs in this area. 4) Device according to claim 3, characterized in that the ends of the individual parts (2, 3) are designed as independently sealing, conical threaded pieces (18, 19) to connect the individual parts. 5) Device according to claims 1 to 4 characterized gekennzeichn et that the impact head (7) is designed so that the impact hammer (9) of a Schlaggerät.es (R) of a known type can be connected. 6) Device according to claim 5, characterized in that the impact device (8) is mounted on a mobile mast construction (lo) which can be provided so as to be vertically displaceable in a constrained guide, and that a winch is provided for vertical lifting of the impact device (8). 7) Device according to claim 6, characterized in that the mast construction (lo) can be placed on a holding post (16) which can be driven into the ground (17). 130027/0 ^ 06