DE102008057245A1 - Modular probe base and its components - Google Patents

Abstract

A probe base for the probe foot of a geothermal probe, which contains the deflection of a media inlet to a media return and which has a receptacle for an adapter, in which the media inlet and the media return open separately. Set weights and measures for leakage monitoring are described as further components for a probe foot.

Description

The The invention relates to a modular probe foot of a Geothermal probe and its components.

• a) Eine direkte Umlenkung, bei der ein Rohr an der untersten Stelle des Sondenfußes zu einem U geformt wird, ein Beispiel dafür zeigt die WO 03/078905 A1 ;
• b) Verschweißen der Rohrenden von Zulauf und Rücklauf mittels eines U-Formstückes, welches die Umlenkung sicherstellt, diese Variante ist in der EP 1 036 974 B1 beschrieben.

Geothermal probes are used to exploit geothermal energy as a heat exchanger in the ground. A liquid medium is led via at least one inlet pipe to the probe foot, deflected there and guided over a return pipe out. The deflection takes place via a U-shape in the probe foot according to the following principles:

• a) A direct deflection, in which a tube is formed at the lowest point of the probe foot to a U, an example of which shows the WO 03/078905 A1 ;
• b) welding the pipe ends of inlet and return by means of a U-shaped piece, which ensures the deflection, this variant is in the EP 1 036 974 B1 described.

The Deflection at the probe foot is not only the mechanical on strongest loaded component of a geothermal probe, It is also the most demanding in terms of aerodynamics Part of the probe foot.

It is therefore the object of the invention to provide a probe foot for To provide, in which the diversion efficient and is designed flexibly. This probe foot should after various principles designed geothermal probes for Use come, for example, both in single-circuit geothermal probes than even with two-circuit geothermal probes, and should possibilities include, if necessary, equipped for leakage monitoring and to be used in combination with setting weights.

These Problem is in accordance with the present invention solved by constructing a probe foot modular is, with the diversion in one for all probe feet a Nennweit identical component is housed, namely a probe foot lower part, and thus optimized flow mechanics can be, with only a mold is needed. The adaptation to the specific construction situation and applications succeeds then with the help of adapters.

Accordingly a probe base for the probe foot of a Geothermal probe, which is the diversion of a medium inlet contains to a medium return, designed so that a receptacle is provided for an adapter, in the media feed and the media return flow separately.

Preferably has the bottom of the probe foot on its outside a form-fitting surface with elevations and / or depressions on, which are arranged and designed so that a structurally identical Probe foot base with its form-fitting surface essentially fit exactly on the form-fitting surface and that is thus a displacement of the two probe base parts prevented in the plane of the positive surface relative to each other is.

One single probe base according to the The present invention thus forms the basis for a Single-circuit geothermal probe, two adjacent probe feet lower parts form the basis for a two-circuit geothermal probe. about the positive fit of the same design probe base parts is a shift to each other no longer possible. A fuse can have one extra, both probe foot bottoms surrounding retaining ring done. Through the integration or integration the retaining ring contour in a required setting weight is the creation a two-circuit heating probe with the mounting of the setting weight combined. The introduction of the retaining ring contour in a set weight leads to a compact unit consisting of setting weight and probe foot, which can have a positive effect on the removal. The assembly happens on site or in the factory when assembling the probes.

Two-circuit geothermal probes, also referred to as duplex probes are, for example, from WO 2006/100014 A1 known. Although the individual probe end pieces described there also fit together geometrically, they are not identical in construction. They are secured together by means of a bolt or a screw.

The Mating interface should be essentially over the height and / or width of the bottom of the probe base extend. Preferably, the outline of the form-fitting surface essentially at right angles. More preferably, the form-fitting surface at least two with respect to a center of the interlocking surface diametrically arranged elevations and / or depressions, which are in the center touch according to a special embodiment.

In order to protect the probe base against mechanical stress when introducing the geothermal probe into a borehole, an impact protection is provided below the receptacle, which may have a rib structure and / or may be formed from other steaming materials, such as foam. Foamed polyurethane is particularly suitable because it is pulse-damping, but can push away smaller obstacles, as in the WO 2006/100014 A1 is described.

In the field of impact protection a continuous bore is still provided by means of a set weight and / or a holder for a push rod or the like is to be attached. By introducing a disc with a corresponding passage on the receiving linkage, this can be used by the use of a holder in the single-circuit geothermal probe as a receptacle for both a push rod and set weights. Through the disc a possible rotation of the receiving link around its own axis is prevented even with the two-circuit ground probe by positive locking.

Further Advantageously, the receptacle has at least one positioning element which clearly defines the position of the adapter. This can be designed as a nose, rib, gutter, indentation or the like be, a complementary feature can be found on the adapter.

The Recording is still on the respective joining process matched, with the adapter on the respective bottom of the probe foot to be connected. So she can use cylindrical areas for have the arc welding. As an alternative, the recording Conically designed for gap-free laser welding be.

The Probe foot lower part has in particular the contour of the deflection and thus significantly determines the flow properties. Due to the largely open U-shape without undercut is the Possibility of using simple means, such as nuclear adjustments, mechanical processing, etc., this outer surface to optimize flow. By introducing special Forms, for example, flow obstacles, can be a turbulent or laminar flow generated in the bottom of the probe foot which continues into the media return and the promotes good heat transfer to the medium.

With the modular design of probe base (s) and adapters the installation space is reduced to a minimum. This will be beneficial by the shape, in particular of the probe foot base promoted. So its width is in the area of the impact protection less than in the area of admission. There are enough Free space for the escape of air and sediments the probe foot in the borehole during the introduction of the geothermal probe.

To is preferably the cross-sectional area of the probe foot base essentially oval, half oval or rectangular, with the length being the major axis of the cross section is approximately equal to twice the length the minor axis is. This design is also used for two-circuit geothermal probes achieved the compact design.

In the region of the form-fitting surface, the bottom part of the probe foot can have a substantially semicircular groove running through in the vertical direction into which a receiving linkage for a push rod such as setting weights is to be inserted. The groove may have radially projecting paragraphs, which introduce the forces occurring at the receiving link evenly in the probe foot lower part. Unlike the prior art, for example, after WO 2006/100014 A1 in which the push linkage is inserted into a blind bore, in the present invention, the take-up linkage is continuous, and abrupt impact forces are dissipated directly into a set weight or soil without loading the probe foot.

To the Complete the construction of a probe foot An adapter is inserted into the socket of the probe base set and connected to this. Depending on the type of adapter you can Probe feet for single or single circle Two-circuit geothermal probes, area-optimized single-circuit or two-circuit geothermal probes with multiple tubes and for Probes are formed with Verfüllrohrhalterung.

Area optimized geothermal probes are in the CH 687 043 A5 disclosed. There it is executed, as by suitable choice of the cross-sectional areas of inlet pipes and return pipe, the flow rate and thus the residence time of the medium can be influenced. The use of multiple flow tubes favors heat absorption or heat dissipation because of the increased contact surface. By using the adapter according to the invention, these findings can be implemented for virtually any construction situation.

According to a variant of the present invention, the adapter has an insert on which a double sleeve is applied, wherein in each case a sleeve cup for the media inlet and a sleeve cup for the media return is provided. Each socket cup of the double socket can be provided with a heating coil for the connection of pipes. It is particularly preferred to guide the heating coil from a socket cup into the second socket cup via an overlapping region in which the socket cups adjoin one another. For the area optimization of inlet and return is seen in a variant before that the adapter has an insert on which a double sleeve for the media inlet and a sleeve cup for the media return are applied. Depending on the operating mode (summer or winter operation), the flow direction can be operated in the opposite direction, this allows adaptation of the heat input or heat discharge surfaces depending on the operating mode of the geothermal probe. Again, the double sleeve may be provided with a connected heating coil, so that a simultaneous welding of Zulrohroh is possible. The sleeve cup for the media return can also have a heating coil, which is to apply separately with energy. According to an advantageous embodiment, the adapter has a holder for a filling pipe, wherein the filling pipe serves for introducing the required borehole filling and can be positioned in a defined manner.

The Muff cups have a cylindrical shoulder for covering on the Bechermund a possibly existing protective tube approach, which in the Preparation of a pipe with protective jacket for welding arises. This integrated paragraph becomes the protective layer of the pipe also ensured over the pipe ends.

Probe foot-butts and adapters are preferably made of thermally conductive plastic, For example, cross-linked polyethylene, PEX or polypropylene and can thus be produced by injection molding. this makes possible it, by simple changes in the injection core diameter and thus the wall thickness probe feet for to generate different pressure levels.

To the Introducing borehole heat exchangers become so-called setting weights used, which counteract the resulting buoyancy and bring the probe foot to its final position. To this Purpose, the probe feet have hanging options, such as eyelets, hooks and the like, up.

there Depending on the type of geothermal probe and the substrate different weights used. The known set weights usually consist of a cylindrical solid steel rod, which has a corresponding receptacle for hanging on the probe foot.

By this free suspension of the set weights on the probe foot exists However, there is a risk that the probe foot with the set weight stuck in the borehole. This danger is especially given when the probe, as is often necessary, during insertion partially raised. Moreover, in most Cases the size, d. H. the weight, the set weight can only be determined on site, if the hole was performed and the final condition the well is known.

there the introduction of the probe is greatly simplified when the leading Section of the probe forms a rigid unit. Therefore, in practice a rod about 1.5 m long, which mostly consists of steel, directly fixed to the probe foot between the probe tubes, thereby the desired stiffener is delivered.

The Invention now provides setting weights with which an improved and secure rigid connection to the probe foot possible is. This is for a positive connection the set weight to the probe foot taken care of by the set weight has a receiving tube into which insert the probe foot is. This creates a rigid unit, the introduction of the Probe facilitated in the borehole. Furthermore, a tilting of the Setting weight for the probe foot no longer possible, which in turn jamming of setting weight and probe foot in Borehole prevented. At the same time, for an additional Protection of the probe foot taken care of, on the one hand by the cladding through the receiving tube, in the further by the setting weight itself.

The Setting weight itself is preferably made of a thin Outer layer, which according to a preferred embodiment can be made of plastic. In this outer layer is For example, by means of ring embossing introduced a receiving tube, which is firmly connected to the thin outer layer is. This compound can be filled by filling the gap done, but also via a welded joint. Should the set weight with a probe foot, as it is herein previously described, corresponds to the inner diameter of the receiving tube preferably the outer diameter of the probe foot base or adjacent probe base parts, as appropriate, whether a single-circuit or a two-circuit geothermal probe constructed shall be.

Consequently there is the possibility of directing the probe foot in the set weight and so for a stable, tamper-proof connection. Depending on the type of probe foot this can be introduced accordingly deep into the receiving tube regardless of whether a single-circuit or a two-circuit heating probe is built. Often, in the probe foot base or at the bottom of a conventional probe foot provided a hole that can now be used by Insert a corresponding pin through the bottom of the probe base and the set weight is guided, a unit of these to form two components.

It may also be provided, the receiving tube with two or more holes To provide that have a different distance, so that at different Adapted embodiments of a probe foot can be, for example, for the single-circuit or dual-circuit design.

It can set the weight at its opposite the probe foot End conical to make any obstacles in the hole easier to displace or circumvent.

Of the Thought of modular design, already in the design of the Probe base parts according to the invention is essential, can be transferred to the design of setting weights become. So it is advantageous to use a variant of the setting weight for To provide, which at the exposed end of a Has bore, so that another, appropriately ausgestaltetes Setting weight can be plugged and fixed.

in principle can use this principle any number of set weights in Series rigidly connected by using intermediate pieces where an inner diameter at the end of the outer diameter of the receiving tube, wherein the outer diameter at most the outer diameter of the outer layer of the setting weight main body should correspond. In the Terminology of the invention is intended between "adapter set weights", the intermediate pieces, and "final set weights", which have a conically shaped end, can be distinguished.

Consequently becomes a probe foot, for example the one described previously has been introduced into the receiving tube of an adapter setting weight and pinned. On the opposite side of the adapter set weight an intermediate piece is pushed and pinned, whereupon another adapter set weight inserted and also pinned can be. Other adapter set weights can be used accordingly be placed with intermediate pieces and pinned. After all the final set weight is fixed. To achieve the stiffening, could also be the entire set of set weights in a corresponding long "intermediate piece", ie a cap sleeve, to be built in. Thus, with this modular structure an arbitrary desired unit of setting weights are constructed.

The Weight of each component can be filled by filling Body with appropriate material, such as iron or barite, be set. It has proven to be advantageous to pour this filling with concrete and thus the whereabouts of the filling in the mold and the stabilization of the to ensure any imprints that may exist. A Version with other materials, such as steel, reinforced concrete etc., is also possible.

The Plastic outer layer acts as a cushioning Element, which is particularly advantageous when transporting the weights is. There is also damage to the probe foot excluded by any hard edges.

In order to can be due to the modular design of setting weights on site with simple Means a unit can be created which individually on the Requirements of the well is matched. By the form-fitting Connection to the probe foot and the connection of the setting weights with each other creates a rigid unit of probe foot and Settling weights, resulting in the introduction of the probe into the well considerably simplified and jamming of the probe foot in the borehole bows.

One Another problem with the installation of geothermal probes exists in danger of pollution of the underground in the big one Scope through the heat transfer medium, which also by the depth of the facilities outside of water conservation areas consists. In the market pipe systems are present, which with the help of a continuous conductive layer, for example made of aluminum, a violation of an outer protective layer detect by monitoring the electrical potential can. Such a pipe is usually as a three-layer pipe constructed, consisting of the pressure tube as inner layer, the monitoring layer and the already mentioned outer protective layer. These pipe systems come with standard installations in water protection areas and for sensitive media used.

Around the use of such piping systems in geothermal probe applications to enable a probe foot is needed which is a tight electrical connection of two or more can produce conductive layers.

To provides the invention, at probe feet, for example those described above, another joining zone provide per pipe end. With this additional joining zone the outer protective layer becomes tight with the probe body welded. In the free space between the joining zone the outer protective layer and the joining zone of the inner pressure tube becomes the conductive middle layer contacted. Directly over the contact element, for example via protected ladder, another contact of one or more several protective layers are shorted. By this short circuit the protective layers become one for leakage monitoring necessary electrical monitoring circuit generated.

By a spring-loaded contact is possible through simple insertion of the pre-treated pipe ends a permanent Ensure contacting of the conductive layer.

there can change the spring characteristic by the shape and a corresponding ensures selected material of the contact element become. An embodiment is also conceivable in which a separate spring is provided.

This will make it possible to damage the outer protective tube during probe insertion as well as during operation of the system to recognize. In particular, online monitoring of the protective layer can now take place in direct operation of the system.

in the Below, the invention with reference to the accompanying drawings be explained in more detail.

there is:

1a a perspective view of a probe foot base according to the present invention;

1b a perspective view of the probe foot base 1 in which the positive-locking surface can be seen;

1c a perspective view of the recording line,

1d a perspective view of the probe foot base with an inserted Aufnahmegestänges;

2a a perspective view of two probe base parts according to the present invention, which are arranged to construct a probe foot of a two-circuit geothermal probe;

2 B a perspective view of the composite probe foot parts 2a ;

3a a perspective view of an adapter for the probe foot of a single-circuit geothermal probe;

3b a perspective view of an adapter for the probe foot of a single-circuit geothermal probe with surface optimization;

3c a perspective view of an adapter with Verfüllrohrhalter;

4a a perspective view of a probe foot according to the present invention for a single-circuit geothermal probe;

4b a perspective view of an optimized probe foot for a single-circuit geothermal probe;

5a a perspective view of a probe foot according to the present invention for a two-circuit geothermal probe;

5b a perspective view of an optimized probe foot of a two-circuit geothermal probe;

6a a perspective view of a probe foot base for a single-circuit geothermal probe and an end-setting weight according to the present invention;

6b the interconnected components of the 6a in perspective view;

7a a perspective view of a probe foot of a two-circuit geothermal probe and a final setting weight according to the present invention;

7b the composite components of 7a in perspective view;

8th a perspective view of an adapter-setting weight according to the present invention;

9 a perspective view of an adapter setting weight and a final setting weight according to the present invention prior to assembly;

10 a longitudinal sectional view of a pipe system that allows leakage monitoring;

11 a perspective view of a probe foot base with an additional joining zone for the protective layer of a pipe system according to 9 ;

12 a sectional view and a perspective view of pipe systems for leakage monitoring, which are to be used in a probe base, for example according to the present invention, together with detailed views illustrating the position of a contact element;

13 the insertion of a pipe system over the contact area of the joining zone for the pressure tube, wherein the contact element is shown in contact with the conductive layer;

14 the insertion of the second pipe system beyond the joining zone for the protective tube, so that now the contact element makes the connection between the conductive layer of the first pipe system and the second pipe system.

1a shows a probe base 10 according to the present invention, which forms the basis for the construction of a probe foot of a geothermal probe. The probe base 10 has a substantially cuboidal structure in which upper area a shot 12 is provided for an adapter. The probe base 10 rejuvenates from the shot 12 forth to an impact protection 14 , which is about half the height of the bottom of the probe foot 10 extends. In the illustrated embodiment, the impact protection 14 from a variety of horizontally extending ribs 16 and a plurality of vertically extending ribs 18 , which together form a structure which not only allows the safe insertion of the probe foot under harsh site conditions, but also compensates for impacts caused by the insertion of the probe by the setting weight or scree and the like. Above the impact protection 14 is a half-round collar 26 whose function is related to the 5a and 5b is explained in more detail. On the transition area of the recording 12 and the half-round collar 26 there are deflectors 15 which protect the pressure range of the deflection of the probe foot during insertion and distract any obstructions. In the middle area of the impact protection of the probe foot base 10 There is a transverse through hole 20 in which setting weights, receiving links or a special holder for a push rod can be attached. At the end of the bottom of the probe base snap hooks are on both sides 19 attached its function in connection with the 5a and 5b will also be explained in more detail

1b shows the bottom of the probe foot 10 of the 1a in a perspective view, in the details of the recording 12 for an adapter and a form-fitting surface 30 are more recognizable. The oval picture 12 has a nose on its inside 22 (not in current version), which clearly defines the position of the adapter to be inserted. To the adapter in the receptacle 12 To capture, the inner surfaces of the recording 12 be prepared for example for the electrofusion.

The form-fitting surface 30 is located on the impact protection 14 opposite side of the probe foot base 10 , The form-fitting surface 30 is in four rectangular areas 32 . 34 . 36 . 38 split, with the areas 32 . 38 opposite the areas 34 . 36 lie behind or the areas 34 . 36 cuboid elevations from the through the areas 32 . 38 form a defined level. The surveys 34 . 36 and the depressions 32 . 38 are provided with a hole structure for reasons of saving material. The illustrated embodiment shows two with respect to the center of the form-fitting surface diametrically opposite elevations 34 . 36 and depressions 32 . 38 that are in the center of each other. There are also embodiments with a different number of surveys and / or wells conceivable, it only has to be ensured that a structurally identical probe foot base is fit with its form-fitting surface accurately and move safe. In the form-fitting surface 30 is still a substantially semicircular groove 40 formed, in which a plurality of radially projecting paragraphs 42 protrudes. In the survey 36 is a circular omission 45 introduced, which the rotation of the receiving link 50 receives.

1c shows a continuous receiving linkage 50 , The recording rod 50 has a variety of retaining grooves 52 on which a uniform division of forces arising through push rod and setting weight in the probe foot allow. At the top of the take-up stand 50 is a recording 54 provided for a push rod, which is a thread for receiving an adapter or the adapter itself depending on the version. At the lower end of the take-up stand 50 there is a recording 56 for a set weight, which is designed as a thread, hook or eye. In the lower part of the take-up stand 50 there is a disk 57 , which is firmly connected to the linkage and represents a rotation. Through the opening of the disc, which is the hole 20 Equivalent to fasteners for weight or push rods can be used without the support rod 50 to remove. When used as a single-circuit probe can via the disc using a fastener, the receiving linkage 50 safe with the probe foot base 10 get connected.

1d shows how in this groove 40 a continuous support rod 50 is used. The recording rod 50 has a variety of retaining grooves 52 on, the radially projecting paragraphs 42 in the groove 40 ( 1b ) correspond.

2a shows how two probe feet bottoms 10 . 10 ' be assembled to a probe base of a probe foot for a two-circuit geothermal probe. The form-fitting surfaces 30 . 30 ' correspond exactly. That in the retaining grooves 40 . 40 ' used linkage 50 is through the form-fitting surfaces 30 . 30 ' held. The positive locking prevents displacement of the two probe base parts 10 . 10 ' up to today. The result is in 2 B shown. The two probe base parts 10 . 10 ' be through an additional retaining ring, which in connection with the 5a and 5b is described and the around the two probe base parts 10 . 10 ' is secured to each other.

2 B also shows more clearly the design of the recording 12 with the nose running in the vertical direction 22 and a sleeve collar 24 , which serves as a circumferential bearing surface for the adapter in one defined insertion depth of the recording 12 is trained. The half-round collar 26 on the bottom of the probe base 10 has its equivalent in a half-collar 26 ' on the bottom of the probe base 10 ' added to a ring collar, on which a retaining ring 80 ( 5a . 5b ) comes to the plant.

3a shows a perspective view of an adapter 60 in the recording 12 ( 1a ) of a probe base 10 is to be used according to the present invention. This is indicated by the adapter 60 an insert 62 on, in its outer contours the inner contours of the recording 12 equivalent. In particular, the insert comprises 62 a depression in which the nose 22 the recording 12 attacks. On the insert 62 sits a double socket with two socket cups 63 . 64 , which receive the pipes for the media inlet or media return. The tubes, for example, by means of Heizwendelschweißtechnik insoluble and fluid-tight with the double sleeve 63 . 64 get connected. The possibly provided heating coil are made via contacts 65 . 66 welded, which extend in the axial direction, in order to produce any additional interference surfaces in the direction of introduction. The double sleeve 63 . 64 shows preferably a paragraph in the respective sleeve cup in the protective tube layers can be taken if necessary. This overlap ensures protection of the media pipe even in the welding zone.

The optimized deflection in the base of the probe foot 10 As a result, the double sleeve 63 . 64 the tube ends together at a spatial minimum, so that the corresponding sleeve cups abut each other in the central region. At this overlap site 67 creates an area in which the two heating coil of the welding zones in the double sleeve in the upper, not pressure-loaded area using a Verbindungsnut 69 can be connected. Thus, it is possible to weld both pipe ends in one step with the respective sleeve cup.

3b shows an adapter for a probe foot of a single-circuit geothermal probe, which is optimized surface, in such a way that for receiving the media tubes, a triple sleeve is provided which consists of a double sleeve 73 . 74 with smaller inner diameter for the media inlet / return and a sleeve cup 75 is formed with a larger inner diameter for the media return / flow and is arranged on an insert. By this design, the surface, which contributes significantly to the heat transfer, optimized. By distributing the volume flow from a pipe into two or more pipes with the same or a similar total flow area, but with different pipe diameters, the peripheral area and thus the heat exchange area are drastically increased, so that the efficiency of the geothermal probe increases. Depending on the mode of action - cooling or heating - the flow direction of the medium can be adjusted.

All muff cups 73 . 74 . 75 can be provided with heating coils, wherein the leadership of the heating wires in the double socket 73 . 74 analog can be the same as for the double sleeve 63 . 64 in 3a has been described. Thus, while the pipes for the media feed can be welded together, a separate weld for the pipe for the media return is required. Again, the contacts 76 . 77 and 78 . 79 guided in axial directions, so that no additional interfering surfaces are generated.

3c shows a variant of an adapter, in which a downwardly partially or completely open cup 68 with integrated holding device, for example a heating coil, on the double socket 63 . 64 is appropriate. This makes it possible to attach and define a filling pipe for introducing the required borehole filling.

4a shows a probe foot for a single-circuit geothermal probe by combining a probe base according to 1a with an adapter 60 according to 3a originated. The adapter comes with its insert 62 in the recording 12 of the probe foot base 10 set and connected there with this, for example by Heizwendelschweißen or laser welding. The probe foot 10 can then as usual with the recording linkage 50 and set weights. 4b shows the variant in which an adapter 70 according to 3b into the bottom of the probe foot 1a is used.

5a shows a probe foot of a two-circuit geothermal probe, in the first two single-circuit geothermal probe according to 4a are joined together as it is in 2 B is shown. The probe base parts 10 . 10 ' which is a receiving link between them 50 include, by means of a retaining ring 80 which is in the area of impact protection 14 around the bottom of the probe base 10 . 10 ' placed, secured. By means of suitable snap hooks 19 is an accidental stripping of the retaining ring 80 avoided. Because the joining direction of the retaining ring 80 is in the direction of insertion of the probe foot, the retaining ring 80 pressed into the massively executed end position. Thus, the retaining ring acts 80 as an additional protective tube. Between the cuboid probe foot 10 and the retaining ring 80 In turn, openings form through which air and sediment can escape when the probe base is introduced. 5b shows the variant in the single-circuit geothermal probe according to 4b are joined together. at The resulting surface-optimized dual-circuit geothermal probe, the possibility exists through a Y-piece, the two Medienrohe in the socket cups 75 and 75 ' above the probe foot to unite a pipe and to further improve the area ratios and costs.

6a For example, FIG. 3 shows an end placement weight following here, along with a probe foot according to the embodiment 4a is used. The probe foot has a receptacle 102 which is designed so that at least a lower portion of the probe foot base can be used. The probe foot can then by means of a pin (not shown) by drilling in the final set weight 100 or provided in the probe foot to be fixed. To facilitate the insertion into the ground, this is the receiving tube 102 opposite end 104 the end-setting element is conical. 6b shows the components in the assembled state.

7a shows a corresponding representation for a dual-circuit probe system, for example, according to the 5a is trained. Again, the probe foot is easy in the recording 102 the final insertion weight 100 introduced and fixed. 7b shows the component in assembled condition.

8th is a perspective view of an adapter set weight 100 ' according to the present invention. Here's the pickup tube 102 opposite end 106 designed such that it has an intermediate piece in the receiving tube 102 a further adapter setting weight or a final setting weight is insertable.

9 illustrates the modular design associated with the adapter set weights 100 ' and a final set weight 100 according to the present invention is possible. The two components are via an intermediate piece 108 rigidly connected.

10 shows in a longitudinal sectional view of the structure of a pipe system that is suitable for leakage monitoring. An internal pressure tube 200 is of a conductive layer 202 surrounded, which may for example consist of aluminum. This conductive layer 200 gets through a protective layer 204 protected from plastic.

11 shows an adapter 3a for receiving a pipe system according to the 10 has been adjusted. In addition to a joining zone 210 for the pressure tube 200 is a joining zone in each socket cup 212 intended for the protective layer. The joining zones 210 and 212 are by a step or a paragraph 216 separated. This overlap ensures protection of the media pipe even in the joining zone / welding zone. The area between media feed and media return is through a contact element 214 bridged.

The 12 to 14 show a sequence of steps that provide the conditions for leakage monitoring in a geothermal probe system. First, pipe systems 200 . 200 ' prepared for the media feed / media return by adding the protective layer 204 is partially removed, leaving the conductive layer 202 exposed (see also 10 ) and in an adapter, such as in the 11 shown introduced. It is understood that leakage monitoring can also be used with other probe feet, provided that they offer the possibility that the protective layer and the pressure tube can be connected reliably. Then one of the pipe systems 200 . 200 ' , either for the media inlet or for the media return, pushed so far into the corresponding adapter opening or the opening of another probe foot that the contact element 214 the conductive layer 202 touched. This situation is in the 13 shown. Subsequently, the other pipe system is inserted accordingly, so that now the contact element 214 forms an electrical bridge between the protective layer of both pipe systems. Subsequently, protective layers and pressure pipes in the joining zones 212 respectively. 210 the adapter are welded, for example, where, depending on the circumstances, the pipe systems are welded individually or simultaneously in the corresponding joining zones. The finished ground probe is in 14 shown.

The The present invention provides numerous variants of a probe foot available on site or at the factory without tools can be composed. Due to the "modular system" of the Probe foot depending on the application and intended use with the appropriate Adapter piece to be provided as a transition.

The Setting weights and leakage monitoring can also with probe feet other than those described herein used, if necessary, after adjustments to this are made.

The in the above description, in the drawing and in the Claims disclosed features of the invention can both individually and in any combination for the To be essential to the realization of the invention.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 03/078905 A1 [0002]
• - EP 1036974 B1 [0002]
• WO 2006/100014 A1 [0009, 0011, 0018]
• CH 687043 A5 [0020]

Claims (33)

Probe base for the probe foot of a geothermal probe, which contains the diversion from a media feed to a media return and which has a receptacle ( 12 ) for an adapter ( 60 . 70 ), into which the media inlet and the media return flow separately. Probe bottom part according to claim 1, characterized in that the probe base ( 10 ) on its outside a form-fitting surface ( 30 ) with surveys ( 34 . 36 ) and / or depressions ( 32 . 38 ), which are arranged and designed so that a structurally identical probe base ( 10 ' ) with its form-fitting surface substantially exactly fitting on the form-fitting surface ( 30 ' ) and that thus a displacement of the two probe base parts ( 10 . 10 ' ) is prevented relative to each other. Probe bottom part according to claim 2, characterized in that the positive-locking surface ( 30 ) substantially over the height and / or across the width of the probe base ( 10 ). Probe bottom part according to claim 1, characterized in that the outline of the positive-locking surface ( 30 ) is substantially rectangular. Probe foot lower part according to one of claims 1 to 4, characterized in that the form-fitting surface at least two with respect to a center of the positive-locking surface diametrically arranged elevations ( 34 . 36 ) and / or depressions ( 32 . 38 ) having. Probe bottom part according to claim 5, characterized in that the form-fitting surface two in the center-contacting, cuboid elevations ( 34 . 36 ) and / or depressions ( 32 . 38 ) having. Probe bottom part according to one of claims 1 to 6, characterized in that below the receptacle ( 12 ) an impact protection ( 14 ) is provided. Probe bottom part according to claim 7, characterized in that the impact protection a rib structure, in particular a grid-like rib structure ( 16 . 18 ). Probe bottom part according to claim 7, characterized in that the impact protection ( 14 ) is formed of foam. Probe bottom part according to one of claims 1 to 9, characterized in that in the region of the impact protection ( 14 ) a through hole ( 20 ) is provided, by means of which a setting weight and / or a holder for a push rod or the like is to be attached. Probe base according to one of claims 1 to 10, characterized in that the receptacle ( 12 ) at least one positioning element ( 22 ), which shows the position of the adapter ( 60 . 70 ). Probe base according to one of claims 1 to 11, characterized in that the receptacle ( 12 ) has cylindrical areas for the electric welding. Probe base according to one of claims 1 to 11, characterized in that the receptacle ( 12 ) is conically shaped for the laser welding. Probe base according to one of the claims 1 to 13, characterized in that the exposed surface the deflection has flow obstacles, which a generate laminar or turbulent flow. Probe bottom part according to one of claims 1 to 13, characterized in that its width in the region of the impact protection ( 14 ) is lower than in the area of admission ( 12 ). Probe base according to one of the claims 1 to 15, characterized in that its cross-sectional area is substantially oval, semi-oval or rectangular, with the length the major axis is approximately equal to twice the length of the Minor axis is. Probe bottom part according to one of claims 1 to 16, characterized in that it in the region of the positive surface ( 30 ) is a vertically continuous, substantially semicircular groove ( 40 ) into which a take-up ( 50 ) is to be used. Probe base according to claim 17, characterized in that the groove ( 40 ) radially projecting paragraphs ( 42 ) having. Adapter for the probe foot of a Geothermal probe in or over the receptacle a probe base according to any one of the claims 1 to 18 is to be set. Adapter according to claim 19, characterized in that it comprises an insert ( 62 ), to which a double socket ( 63 . 64 ) is applied, each vorgese a sleeve cup for the media inlet and a sleeve cup for the media return hen is. Adapter according to claim 19, characterized in that it comprises an insert ( 22 ), to which a double socket ( 72 . 74 ) for the media feed / return and a sleeve cup ( 76 ) is applied for the media return / feed. Adapter according to claim 20 or 21, characterized in that each socket cup of a double socket ( 63 . 64 ; 73 . 74 ) is provided with a heating coil for the connection of pipelines. Adapter according to claim 22, characterized in that the heating coil of a sleeve cup ( 63 ; 73 ) over an overlap area ( 67 ; 77 ) in which the sleeve cups adjoin one another, in the second sleeve cup ( 64 ; 74 ) is guided. Paragraph in each socket mouth, in which protective tube layers may be included. This overlap ensures protection of the media pipe even in the welding zone. Adapter according to one of Claims 19 to 23, characterized by a shoulder ( 216 ) in the respective socket cup, in which, if appropriate, protective layers of a pipe system ( 200 . 200 ' ) can be recorded. Adapter according to one of claims 19 to 24, characterized in that it comprises a holder ( 68 ) for a filling pipe. Probe foot of a single-circuit geothermal probe, consisting of a probe base ( 10 . 10 ' ) according to one of claims 1 to 18, in which an adapter ( 60 . 70 ) is used according to one of claims 20 to 25. Probe foot of a two-circuit geothermal probe, consisting of a first probe base ( 10 ) according to one of claims 2 to 18 and a second probe base ( 10 ' ) according to one of claims 2 to 18, wherein the first and the second probe base ( 10 . 10 ' ) with their respective form-fitting surface ( 30 . 30 ' ) lie against each other and with a surrounding retaining ring ( 80 ) are secured together. Probe foot according to claim 27, characterized in that the first and the second probe base ( 10 . 10 ' ) an intake ( 50 ) partially enclose. Probe foot according to claim 27 or 28, characterized in that in the receptacle of the first and the second probe base ( 10 . 10 ' ) an adapter according to one of claims 20 to 24 is inserted. Setting weight, in particular for use with a probe foot according to any one of claims 26 to 29, characterized in that it comprises an elongate base body, the first end of a receptacle ( 102 ) at least for the lower portion of a probe foot, which at least partially surrounds the lower portion of the probe foot. Setting weight according to claim 30, characterized in that the second end ( 104 ) is tapered. Setting weight according to claim 30, characterized in that the second end with a receptacle ( 106 ) is provided for direct or indirect coupling of another set weight. Modular setting weight, with a setting weight according to claim 31 and at least one setting weight according to claim 32, which comprises one or more intermediate pieces ( 108 ) are coupled together.