EP1347122B1 - Packer and method for inserting this packer in a construction element - Google Patents

Abstract

Process for fixing a packer (1) in a building part made of solid mineral building material comprises inserting the packer in a hole (10) leading into the building part from the outer surface of the building part, introducing a liquid fixing material (11) between the outer surface of the packer and an inner surface of the hole, and solidifying the fixing material so that the packer is held in the hole by the solidified fixing material. The fixing material is a material which foams on introduction into the hole and solidifies as a foam. An Independent claim is also included for an assembly consisting of a packer for carrying out the above process. Preferred Features: The fixing material is introduced via a cannula.

Description

The present invention relates to a packer and a method for Inserting this packer in a building part.

When injecting liquid media into building parts made of solid mineral Building materials, such as masonry, concrete and the like (but not made of wood or metal) so-called packers are used. These are in the Substantial tubular devices with an inner tube passage. These Packers are installed in a hole in the building part and serve to inject a liquid medium into the building part. In which Injection medium may be a liquid for the restoration of masonry, for building barrier layers against rising moisture, for Backfilling cavities and sealing cracks and the like act. Regardless of the exact function of the injection medium is the The task of the packer in this is to be able to inject the medium into To provide liquid state in the building part, including on the packer a Line is connected. In this case, relatively high pressures may be necessary, so that the anchoring of the packer in the building part an essential role plays. Often the anchored packers are in the hole after use leave.

JP 01 023 000 A shows a method or sentence or a packer the preamble of claim 1 or 4 or 11th

DE 196 35 828 A shows a packer in a hole in a building part is hammered and anchored in the hole molded sealing beads as Anchoring means. Thereafter, liquid injection materials in the Masonry are injected, which solidify in the masonry.

US 4,905,430 shows a packer which is placed in a wellbore and with a sealant, such as a two-part epoxy resin mass, in the hole hardens, is sealed.

Further reference is made to FR 2 606 060.

The invention is based on the technical problem of providing an improved packer and to provide a method for introducing the packer into the building part.

The invention relates firstly to a method for fastening a packer in a building part of solid mineral building material with the features after Claim 1.

Furthermore, the invention relates to a set of one for this method designed packer and a liquid fixing material, for the above Method is designed with the features of claim 4.

Finally, the invention relates to a packer for the said Method is designed and having the features of claim 11.

The invention uses for anchoring the packer in the building part liquid to be introduced fastening material, which is between the packer and solidified the inner wall of the hole. This can be a one-component material acting, for example, solidified by oxygen contact, or a multicomponent material that dissolves after mixing the components solidified. However, the invention is directed to foam-forming Fastening materials that foam after insertion and then solidify, for example PUR foam systems.

The packer is in this new form of attachment in the building part so far adjusted, as he was at his inner part at a certain distance from his Outer part has a sealing lip, which further penetration of the Fixing material in the hole during insertion of the Mounting material or thereafter - for example, during foaming - inhibits or stops.

In this way, in between the outer wall of the inner part of the packer and the inner wall of the hole remaining clearance fastening material are introduced, which essentially remains there and not along the Inner part lost in the no longer detected by the packer inside the hole goes. The remaining between the packer and the inner wall of the hole Fixing material solidifies, preferably under foaming and Expansion, and holds the packer after solidification in the hole. there By adjusting the initially liquid fastening material to the Form of the packer and the hole a very extensive plant and good Filling achieved so that the strength of the attachment is comparatively high.

At the same time, the material of the building part, such as brittle masonry, not strong and not punctually loaded. This distinguishes the invention advantageous from conventional packers in which, for example, pods elastic material can be compressed within the hole to pass through Press against the inner walls of the hole to achieve a clamping action. This clamping effect takes place only between a comparatively small Surface area of the sleeve and the hole inner wall instead of and therefore loads the Masonry or other material of the building part unevenly. If that Material is brittle, the attachment effect is insufficient.

The same applies to the comparison of the invention with conventional packers, the be attached by traction, in which they are similar to a nail in the Masonry be hammered. In contrast, the inventive Packer be pushed into the hole without much effort, then in the manner described to be attached.

The mounting material does not necessarily have to be one solidify the actual solid. It may suffice that it is its viscosity greatly increased. Specifically, the requirements for strength and Resilience of the fastening material after solidification of the strong Material of the building part and of the expected injection pressure at the dependent on the later use of the packer.

The described sealing lip of the packer not only serves to Mounting material between the packer and the surrounding inner edge of the To keep holes. The sealing lip further improves the anchoring of the packer in the fastening material after solidification.

Furthermore, a centering of the packer in the hole through an inner part section of the packer adapted to the inner diameter of the hole. This inner section may be the just mentioned sealing lip. By the Centering ensures that the space between the Packer inner part and the inner wall of the hole at least partially around the The circumference of the inner part is reasonably even, so that the Fixing material well around the circumference of the inner part around.

The attachment material may preferably be cannulated into the hole be introduced, which is in the space between packer and Hole inner wall can be inserted or at least at the outer access let introduce. Preferably, the packer is further provided with a closure plate when inserting the packer in the hole on the outer wall of the building part, so to speak the outer edge of the hole to the plant comes and thus closes the gap to the outside. This degree Of course, it does not have to be tight in the true sense of the word. Similar to the already mentioned sealing lip it is sufficient that a flow out of the Fixing material is at least significantly inhibited.

The end plate may preferably provide ways to perform the Mounting material, in particular the cannula, have. It can be for example, to act on thin sites that are pierced with the cannula, or to relatively small holes, which is nothing to the described termination effect change essential.

The sealing lip described has preferably a distance from the End plate or, if no end plate is present, to the limit between outer part and inner part, which is at least twice, especially preferably at least three times the outer diameter of the Innenteils in this area between the sealing lip and outer part.

Furthermore, it is preferred that the sealing lip is provided in duplicate, wherein between the two single sealing lips is an axial distance, compared to the Distance to the outer part of the packer is relatively small. By the double or Also beyond multiple execution of the sealing lip will be Density improves without a firm pressure of the sealing lip to the To make internal walls of the hole necessary. Moreover, the sealing lip has the described centering function, by the inner part approximately in the hole center holds. In case of multiple execution it can over the centering out the packer also something against a tilt and thus keep a certain Exercise centering function over the longitudinal extent of the inner part. It however, does not significantly affect the precision of this centering. It is only necessary to firmly fasten the packer with the mounting material in the hole To ensure a uniformity of the Zwischenraüms between packer and Inner wall of the hole around the circumference of the packer is not essential. A favorable dimensioning for the sealing lip height is 20% of that at this point in the remaining external diameter of the packer or more. The sealing lip or the sealing lips then have an outer diameter of at least 1.2 times the outside diameter occurring in adjacent areas the packer.

Between the already mentioned end plate and the or the sealing lips Furthermore, a bead (or several beads) may be provided, however has a smaller outer radius than the sealing lip and thus not up to the Inner wall of the hole comes up. This bead can improve the Anchoring of the packer in the mounting material after its solidification serve and thus support the function of the sealing lip (s). It was also empirically found that this bead the distribution of the fastening material between the outer wall of the packer and the inner wall of the hole can. The bead preferably, but not necessarily, runs around the The circumference of the packer inner part around. At only one part of the circumference occurring bead is the concept of the outer radius only on this part Respectively.

Furthermore, an embodiment provides, the inner tube passage of the packer possible Run without restriction, so in particular no valve in the packer provided. This can be an effective injection and in particular a more effective Pressure build-up within the hole can be effected. Together with the to Restructuring building materials on the one hand gentle and on the other hand very effective Anchoring the packer thus results in significant advantages in use.

Finally, the invention provides a further preferred embodiment Coupling on the outer part of the packer, which is for a detachable Snap coupling is provided by a line to be connected. For example, this coupling to a common connection system of Be adapted to garden hoses.

Figur 1

zeigt einen Schnitt durch einen bevorzugten Packer entlang seiner Längsachse, der in ein Loch in einem Gebäudeteil eingesetzt ist.

Figur 2

zeigt den Packer aus Figur 1 in Seitenansicht.

Figur 3

zeigt den Packer in einer Figur 1 entsprechenden Schnittdarstellung, jedoch nur den Packer selbst.

Figur 4

zeigt eine Draufsicht auf den Packer, die einer Ansicht entlang der Längsrichtung entsprechend Figur 2 von oben entspricht.

In the following an embodiment of the invention will be explained. In this case, disclosed individual features may be essential to the invention in other combinations. In particular, the following description as well as the previous one relates both to the device category and to the process category, so that all details are to be understood in their meaning for the method according to the invention and for the packer or packer according to the invention.

FIG. 1

shows a section through a preferred packer along its longitudinal axis, which is inserted into a hole in a building part.

FIG. 2

shows the packer of Figure 1 in side view.

FIG. 3

shows the packer in a figure 1 corresponding sectional view, but only the packer itself.

FIG. 4

shows a plan view of the packer, which corresponds to a view along the longitudinal direction corresponding to Figure 2 from above.

The packer 1 shown in the figures has an inner part 2 and a Outside part 3 on. The inner part 2 and the outer part 3 are perpendicular by a to the drawn in the figures longitudinal axis of the packer 1 extending and the packer 1 surrounding its periphery annular end plate 4th separated. The end plate 4 has two parallel to the longitudinal axis small openings 5 on.

The inner part 2 and the outer part 3 of the packer are otherwise substantially tubular and contain an inner tube passage 6, the, of a light Diameter enlargement approximately in the area of the end plate 4 to the side of the Inside part 2 down apart, smooth cylindrical shape and no further Has constrictions and the like.

At the outer end of the outer part 3 is a connection for a common Snap coupling of a hose coupling system provided. It can For example, one of the common in the garden area Snap coupling systems for tubing act. Depending on the requirements Tube diameter and pressure resistance can of course be different Connection variants can be selected, such as screw-on connections 7 or simple conical tapers for pushing on a hose end.

The inner part 2 of the packer 1 has a relative to its overall length large distance from the end plate 4 two at a small axial distance mutually extending sealing lips 8, which is a slightly smaller Outside diameter than the end plate 4. Approximately in the middle between the end plate 4 facing these sealing lips 8 and the End plate 4 is a further bead-like increase in diameter provided, namely a bead 9 to improve the distribution of the Mounting material and for anchoring the packer in the Mounting hardware. The outer diameter of the bead 9 is larger than that remaining outer diameter of the inner part 2, but smaller than that of the sealing lips 8th.

The described packer 1 is a PE injection molded part, but could also be made consist of a different material and be made in other ways.

When used, the packer 1 by hand and with little effort inserted into a hole 10 shown in Figure 1, wherein the sealing lips. 8 ideally under slight pressure in contact with the inner wall of the borehole 10 or, depending on the tolerances, some of the inner walls of the Wellbore 10 are spaced. The outer diameter of the end plate 4 is in any case larger than the inner diameter of the borehole 10, so that the End plate with its outer edge at the input edge of the borehole 10, So on the outside of the building part, in which the borehole 10 is mounted and which is shown in Figure 1, comes to rest. Here are the Through openings 5, at least one of the two, in conjunction with the borehole 10.

During this manual insertion will be on the inner wall of the Well 10 exerted only small forces, so that the building part, even if it is made of very brittle material, such as cracked concrete or in need of renovation Masonry exists, not or at least only slightly damaged.

When the packer 1 is inserted into the wellbore 10 in the manner described has been through a non-illustrated cannula, a PU liquid through one of the two passage openings 5 of the end plate 4 in the borehole 10th injected and foams up there under strong expansion. Advantageous is the Use of a metering gun for introducing the PUR liquid, the one carries appropriate cannula. The PUR material is in Figure 1 in small points represented and designated 11. It can be seen that the PUR material 11 when foaming around the circumference of the inner part 2 of the packer 1 distributed and while up to the end plate 4 facing sealing lip 8 penetrates. The Both sealing lips 8 hold the PUR material 11 from further penetration in the hole 10 from. Depending on the quality of the system, the sealing lips 8 of the Drill hole inside wall can cause a certain penetration into the Interspace between the two sealing lips 8 or even to a slight further penetration, but this is negligible.

FIG. 1 also shows symbolically represented cracks in the material of FIG Building part, in which the PUR material 11 also penetrates. The PUR material 11 is still relatively low viscous during foaming and thus can be well in fine bumps and cracks penetrate easily along the inner part 2 distribute the packer 1. After foaming, the PUR material solidifies 11 and thus holds by interaction with the outer wall of the inner part 2 of the Packers 1, in particular with the bead 9 and the sealing lips 8, and further by Interaction with the inner wall of the borehole 10, and in particular their Projections, depressions and cracks, the packer 1 very firmly in the borehole 10. This may be a mechanical barrier effect in the sense of Add form-fitting and an adhesive effect. However, the PUR material exercises no large radial forces on the inner wall of the borehole 10, so that the building part by this inventive form of attachment no further is damaged.

The solidified PUR material 11 holds the packer 1 in injecting the Injection medium not only fixed in the hole 10, but seals the Borehole 10, apart from the inner tube channel 6, effective outwards. Thus, the desired pressure build-up can be achieved.

If too much PUR material 11 should have been introduced and the Foaming a certain overpressure arises, so this is on the one hand degraded that the PUR material 11 penetrates into the indicated cracks. To the second, the PUR material 11 but also to a certain extent to the Sealing lips 8 over and through the passage openings 5 in the end plate. 4 penetrate to the outside, so that no excessive pressure can occur.

After solidification of the PUR material 11 of the packer sits tight and tight, so that a hose can be connected to the clutch 7 and under high pressure, a medium for the treatment of the building part are injected can. This injection medium passes through the inner tube channel 6 of the packer. 1 and thus penetrates into the not detected by the packer 1 inner end of the Drill hole 10. From this area, the injection medium must be through the indicated in Figure 1 cracks or through the material of the building part even in the material distribute and unfold its effect. It can be to build a barrier against moisture or mechanical Stabilization or the like act.

The outer part 3 of the packer 1 can by the way in the vicinity of the end plate 4 be equipped with a predetermined breaking point, not shown in the figures, so that it can be broken off after its use, the inner part 2 with the end plate 4 remains in the building part. But it can also be one another possibility of removing the outer part 3 may be provided, such as a Plug or screw connection. In the example shown, the Outer part 3 be frayed after use of the packer 1.

In general, packers are used in larger numbers. The hose system can have a distributor coupling, so that several packers of illustrated design of individual hose pieces with this distributor coupling and can be connected to a single supply terminal.

The figures show the exemplary packer 1 to scale. He actually has a length of about 10 - 20 cm. The inner diameter of the inner pipe channel 6 and therefore the outer diameter should be adapted to the dimensions of the used hose system and the used snap coupling be adjusted. The dimensions of the sealing lips 8 should turn preferably at least 20% larger than the remaining outside diameter of the Inner part 2. At the same time, the distance between the sealing lips 8 and the End plate 4, preferably more than three times the outer diameter of the inner part amount. The outer part 3 of the packer 1 can be handled may be relatively short, but may also be briefly stated for practical reasons become. He should from the end plate 4 to the extreme end preferably at least 0.5-2 cm and preferably not more than 6-15 cm long be.

Claims (14)

1. A method for fixing an injection bolt (1) in a building part of solid mineral construction material,
   in which said injection bolt (1) is pushed into a hole (10) directed from an outer surface of said building part into the inside of said building part,
   a fluid fixing material (11) is introduced between an outer surface of said injection bolt (1) and an inner surface of said hole (10),
   and said fixing material (11) hardens such that said injection bolt (1) is held by said hardened fixing material (11) in said hole (10),
   wherein said fixing material (11) foams and expands after introduction into said hole (10), distributes therein along a substantially tubular inner part (2) of said injection bolt (1), and can penetrate into unevennesses and fissures of said building part, and hardens as a foam,
   wherein after said hardening of said fixing material (11), an injection material is injected into said building part through said injection bolt (1),
   wherein said injection bolt comprises an outer part (3) joined to said inner part (2) and adapted to be arranged outside of said hole (10) after the introduction of said injection bolt (1) into said hole,
   characterized in that said injection bolt comprises a sealing lip (8) for inhibiting an advancement of said fixing material (11) and being arranged at said inner part (2) in a certain distance from said outer part (3) and running around the circumference of said inner part (2),
   and further comprising a closing plate (4) having a larger outer diameter than said sealing lip (8), and abutting against said outer surface of said building part after said pushing of said injection bolt (1) into said hole (10), and substantially closing said hole (10) to the outside, and comprising a thin portion or an opening (5) for introducing said fixing material (11) through said closing plate (4).
2. A method according to claim 1, in which said fixing material (11) is introduced between said outer surface of said injection bolt (1) and said inner surface of said hole (10).
3. A method according to one of the preceding claims, in which said injection bolt (1) is centred at least at portions thereof, in said hole (10) by a sealing lip (8) of said injection bolt (1) adapted to the inner section of said hole.
4. A set of an injection bolt (1) being adapted for a method according to one of the preceding claims and a fluid fixing material (11) being adapted for fixing said injection bolt (1) according to claim 1, wherein said injection bolt (1) comprises:

   a substantially tubular inner part (2) adapted to be arranged in said hole (10) after pushing said injection bolt (1) into said hole (10) and to be held in said hole (10) by fixing material (11) introduced between an outer surface of said inner part (2) and the inner surface of said hole (10),

   and an outer part (3) joined to said inner part (2) and adapted to be arranged outside of said hole (10) after said introduction of said injection bolt (1) into said hole (10),

   and wherein said fixing material (11) is such that it foams and expands after introduction into said hole (10), distributes along said inner part (2) of said injection bolt (1), and can penetrate into unevennesses and fissures of said building part, and hardens as a foam,

   so that after said hardening of said fixing material (11), an injection material can be injected into said building part through said injection bolt (1),

   characterized in that said injection bolt further comprises a sealing lip (8) for inhibiting an advancement of said fixing material (11), being arranged at said inner part (2) in a certain distance from said outer part (3), and running around the circumference of said inner part (2),
   and further comprises a closing plate (4) having a larger outer diameter than said sealing lip (8), and abutting at said outer surface of said building part after said pushing of said injection bolt (1) into said hole (10), and substantially closing said hole (10) to the outside, and comprising a thin portion or an opening (5) for introducing said fixing material (11) through said closing plate (4).
5. A set according to claim 4, in which said distance between said sealing lip (8) and said outer part (3) amounts to at least double the outer diameter of said inner part (2) in the region of said distance.
6. A set according to claim 4 or 5, in which said sealing lip (8) is provided twice and with an axial space between both sealing lips (8).
7. A set according to one of claims 4 - 6, in which the outer diameter of said sealing lip (8) amounts to at least 1.2 times the outer diameter of said inner part (2) in the region between said outer part (3) and said sealing lip (8).
8. A set according to one of claims 4 - 7, in which a bulge (9) having a smaller outer radius than said sealing lip (8) is provided between said closing plate (4) and said sealing lip (8).
9. A set according to one of claims 4 - 8, having a valve-free inner tube passage (6) through said inner part (2) and said outer part (3) of said injection bolt (1).
10. A set according to one of claims 4 - 9, in which said outer part (3) comprises a connection (7) adapted for a removable snap mounting of a supply line.
11. An injection bolt (1) being adapted to be fixed in a building part of solid mineral construction material by being pushed into a hole (10) directed from an outer surface of said building part into the inside of said building part, introducing a fluid fixing material (11) between an outer surface of said injection bolt (1) and an inner surface of said hole (10) and hardening of the foaming fixing material (11), and comprising:

    an essentially tubular inner part (2) adapted to be arranged in said hole (10) after said pushing of said injection bolt (1) into said hole (10) and for being held in said hole (10) by fixing material (11) introduced between said outer surface of said inner part (2) and said inner surface of said hole (10),

    and an outer part (3) joined to said inner part (2) and adapted to be arranged outside of said hole (10) after said pushing of said injection bolt (1) into said hole (10),

    characterized by sealing lip (8) for inhibiting an advancement of said fixing material (11) and being arranged at said inner part (2) in a certain distance from said outer part (3), and running around the circumference of said inner part (2),
    and further by a closing plate (4) having a larger outer diameter than said sealing lip (8) and being adapted to abut against said outer surface of said building part after said pushing of said injection bolt (1) into said hole (10) and essentially closing said hole (10) to the outside, and comprising a thin portion or an opening (5) for introducing said fixing material (11) through said closing plate (4).
12. An injection bolt (1) according to claim 11, in which said distance between said sealing lip (8) and said outer part (3) amounts to at least double the outer diameter of said inner part (2) in the region of said distance.
13. An injection bolt (1) according to claim 11 or 12, in which said sealing lip (8) is provided twice and with an axial space between both sealing lips (8).
14. An injection bolt (1) according to one of claims 11 - 13, in which a bulge (9) having a smaller outer radius than said sealing lip (8) is provided between said closing plate (4) and said sealing lip (8).

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