EP0519180B1 - Injector plug - Google Patents

Injector plug Download PDF

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Publication number
EP0519180B1
EP0519180B1 EP92106830A EP92106830A EP0519180B1 EP 0519180 B1 EP0519180 B1 EP 0519180B1 EP 92106830 A EP92106830 A EP 92106830A EP 92106830 A EP92106830 A EP 92106830A EP 0519180 B1 EP0519180 B1 EP 0519180B1
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EP
European Patent Office
Prior art keywords
cap
shank
shaft
longitudinal bore
injection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92106830A
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German (de)
French (fr)
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EP0519180A1 (en
Inventor
Manfred Dipl.-Ing. Haage
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fischerwerke Artur Fischer GmbH and Co KG
Original Assignee
Fischerwerke Artur Fischer GmbH and Co KG
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Publication date
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Publication of EP0519180A1 publication Critical patent/EP0519180A1/en
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Publication of EP0519180B1 publication Critical patent/EP0519180B1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection

Definitions

  • the invention relates to an injection packer for injecting in particular mineral binder into components according to the preamble of claim 1.
  • mineral binders are used instead of synthetic resin. Because of the different composition and flow properties of synthetic resins and mineral binders, the injection packers used for synthetic resins are not suitable for pressing mineral binders.
  • the invention has for its object to provide an injection packer that can be easily converted for injecting mineral binders in particular.
  • the injection packer without a spray nipple for injections of mineral binder and with a screwed-in spray nipple also for injections of synthetic resin.
  • the considerably larger cross-section of the longitudinal bore of the shaft is available for the flow of the binder. An undisturbed flow is achieved without problems.
  • a check valve is formed which prevents the binder from flowing back after the feed pump has been disengaged.
  • the valve effect is achieved in that when the binder is injected, the base of the cap lifts off the front face of the shaft, thus exposing the openings arranged concentrically to the central axis and outside the longitudinal bore of the shaft. After the injection has ended and the pressure has decreased, the base of the cap is pressed against the end face of the shaft, so that the longitudinal bore of the injection packer is sealed again.
  • the injection packer is inserted into the prepared borehole of the component, the diameter of which for wedging and sealing the injection packer is slightly smaller than the diameter of the shaft of the injection packer.
  • the binding agent is injected into the blind hole until material rises from the adjacent injection packers.
  • the latter has a circumferential groove at its front end, into which a bead arranged on the inner wall of the cap engages for latching.
  • the bottom of the cap can be provided with an inwardly projecting, frustoconical curvature which engages in the longitudinal bore of the shaft. This curvature on the one hand improves the sealing of the longitudinal bore, and on the other hand reinforces the base, so that there is a higher restoring force of the cap.
  • the injection packer 1 is made with its core part 2 from impact-resistant plastic, the connector 3 being integrally formed on the shaft 4.
  • a sealing sleeve 5 made of softer plastic is sprayed onto the core part 2, which, on the one hand, causes the injection packer 1 to hold in the borehole 6 of the concrete part 7 and, on the other hand, seals.
  • the sealing sleeve 5 has a plurality of circumferential ring collars 8, which have a slightly larger outer diameter than the borehole diameter.
  • a cap 9 is placed on the front end of the injection packer and engages with a bead 10 arranged on its inner wall in a circumferential groove 11 of the injection packer 1 in order to lock the cap.
  • the bottom of the cap 9 is provided with openings 13 arranged concentrically to the central axis and outside the longitudinal bore 12 of the shaft 4.
  • the middle part of the bottom forms a closure of the longitudinal bore 12 in the unpressurized state.
  • this middle part is designed as a frustoconical curvature 14 which engages with its inclined surface in the longitudinal bore 12 of the injection packer 1.
  • the injection packer 1 is driven into the borehole 6 of a component 7 with hammer blows.
  • the mineral binder is pressed into the blind hole with a feed pump through the longitudinal bore 12 of the injection packer 1.
  • a pressure of approx. 10 - 20 bar the binder penetrates through the wall of the blind hole into the material of the component 7 to compress it.
  • the spray pressure of the binder causes the bottom of the cap 9 to be lifted from the end of the injection packer to such an extent that the binder can flow through the longitudinal bore 12 and the openings 13 in the cap 9 into the borehole.
  • the base of the cap 9 rests on the end face of the injection packer due to its elasticity, so that the longitudinal bore 12 of the injection packer is sealed again by the inclined surfaces of the arch 14. This prevents back flow of the binder.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Sealing Material Composition (AREA)

Abstract

2.1. In order to repair cracked construction parts, it is known to grout the cracks with synthetic resin injections. Because of the different composition and flow properties of synthetic resins and mineral binders, the injection plugs used for synthetic resins are not suitable for grouting with mineral binders. 2.2. In order to provide an injection plug suitable for grouting with mineral binders, the connection is integrally moulded onto the rear end of the shaft. Furthermore, in order to form a non-return valve, a cap is mounted on the front side of the shaft, the base of which cap has openings disposed concentrically to the centre axis and outside the longitudinal bore of the shaft. <IMAGE>

Description

Die Erfindung betrifft einen Injektionspacker zum Injizieren von insbesondere mineralischem Bindemittel in Bauteilen gemäß der Gattung des Anspruches 1.The invention relates to an injection packer for injecting in particular mineral binder into components according to the preamble of claim 1.

Zur Sanierung von mit Rissen versehenen Bauteilen ist es bekannt, zum Beispiel aus dem Dokument DE-A-3 203 871, die Risse durch Kunstharzinjektionen zu verpressen. Zu diesem Zweck werden in die Risse Bohrungen eingebracht, in die zum Injizieren des Kunstharzes Injektionspacker eingeschlagen werden. Nach dem Eindrehen eines in der Regel als Nippel ausgebildeten Anschlußstückes in das aus dem Bohrloch ragende Stirnende des Injektionspackers wird mit einer Hochdruckpumpe das Kunstharz über einen mit dem Anschlußstück verbundenen Schlauch in die Risse gepreßt. Der Nippel weist üblicherweise ein Rückschlagventil auf, so daß ein Rückfluß des Kunstharzes nach dem Abkuppeln der Hochdruckpumpe verhindert wird. Das als Nippel ausgebildete Anschlußstück mit Rückschlagventil ist jedoch nur für Hochdruckinjektionen von Kunstharz geeignet.For the renovation of components provided with cracks, it is known, for example from document DE-A-3 203 871, to compress the cracks by means of resin injections. For this purpose, holes are drilled into the cracks, into which injection packers are hammered in to inject the synthetic resin. After screwing a connection piece, which is usually designed as a nipple, into the front end of the injection packer projecting from the borehole, the synthetic resin is pressed into the cracks by means of a high-pressure pump via a hose connected to the connection piece. The nipple usually has a check valve so that a backflow of the synthetic resin is prevented after the high pressure pump has been uncoupled. The connector designed as a nipple with a check valve is only suitable for high-pressure injections of synthetic resin.

Für die Sanierung von alterungsbedingt porös und wasserdurchlässig gewordenen Betonteilen, insbesondere im Tunnel- und Kanalbau, wird statt Kunstharz mineralisches Bindemittel verwendet, das mit rasterförmig in Sacklochbohrungen gesetzten Injektionspackern von den Sacklochbohrungen ausgehend radial zur Verdichtung des gesamten Betongefüges unter hohem Druck eingepreßt wird. Wegen der unterschiedlichen Zusammensetzung und Fließeigenschaften von Kunstharzen und mineralischen Bindemitten sind die für Kunstharze eingesetzten Injektionspacker für die Verpressung von mineralischen Bindemitteln nicht geeignet.For the renovation of concrete parts that have become porous and water-permeable due to aging, in particular in tunnel and sewer construction, mineral binders are used instead of synthetic resin. Because of the different composition and flow properties of synthetic resins and mineral binders, the injection packers used for synthetic resins are not suitable for pressing mineral binders.

Der Erfindung liegt die Aufgabe zugrunde, einen Injektionspacker zu schaffen, der in einfacher Weise für das Injizieren von insbesondere mineralischem Bindemittel umrüstbar ist.The invention has for its object to provide an injection packer that can be easily converted for injecting mineral binders in particular.

Die Lösung dieser Aufgabe wird mit den im Anspruch 1 angegebenen Merkmalen erreicht.This object is achieved with the features specified in claim 1.

Durch den einstückig am Schaft angeformten Anschluß ist es möglich, den Injektionspacker ohne Spritznippel für Injektionen von mineralischem Bindemittel und mit eingedrehtem Spritznippel auch für Injektionen von Kunstharz zu verwenden. Für Injektionen von mineralischem Bindemittel steht für den Durchfluß des Bindemittels der erheblich größere Querschnitt der Längsbohrung des Schaftes zur Verfügung. Damit wird ein ungestörter problemloser Durchfluß erreicht. Mit der auf der vorderen Stirnseite des Schaftes aufgesetzten Kappe wird ein Rückschlagventil gebildet, das ein Rückfluß des Bindemittels nach dem Auskuppeln der Förderpumpe verhindert. Die Ventilwirkung wird dadurch erreicht, daß beim Injizieren des Bindemittels der Boden der Kappe von der Stirnseite des Schaftes abhebt und damit die konzentrisch zur Mittelachse und außerhalb der Längsbohrung des Schaftes angeordneten Durchbrechungen freigelegt werden. Nach Beendigung der Injektion und Nachlassen des Druckes wird der Boden der Kappe an die Stirnseite des Schaftes angedrückt, so daß die Längsbohrung des Injektionspackers wieder abgedichtet ist.Due to the integral connection to the shaft, it is possible to use the injection packer without a spray nipple for injections of mineral binder and with a screwed-in spray nipple also for injections of synthetic resin. For injections of mineral binders, the considerably larger cross-section of the longitudinal bore of the shaft is available for the flow of the binder. An undisturbed flow is achieved without problems. With the cap placed on the front face of the shaft, a check valve is formed which prevents the binder from flowing back after the feed pump has been disengaged. The valve effect is achieved in that when the binder is injected, the base of the cap lifts off the front face of the shaft, thus exposing the openings arranged concentrically to the central axis and outside the longitudinal bore of the shaft. After the injection has ended and the pressure has decreased, the base of the cap is pressed against the end face of the shaft, so that the longitudinal bore of the injection packer is sealed again.

Zur Montage wird der Injektionspacker in das vorbereitete Bohrloch des Bauteiles eingesetzt, dessen Durchmesser zur Verkeilung und Abdichtung des Injektionspackers geringfügig kleiner ist als der Durchmesser des Schaftes des Injektionspackers. Nach dem Anschluß des Schlauches der Förderpumpe wird das Bindemittel in die Sacklochbohrung solange injiziert, bis aus den benachbart gesetzten Injektionspackern Material aufsteigt.For assembly, the injection packer is inserted into the prepared borehole of the component, the diameter of which for wedging and sealing the injection packer is slightly smaller than the diameter of the shaft of the injection packer. After connecting the hose of the feed pump, the binding agent is injected into the blind hole until material rises from the adjacent injection packers.

Zur Halterung der Kappe auf dem Schaft weist dieser an seinem vorderen Ende eine umlaufende Nut auf, in die ein an der Innenwand der Kappe angeordneter Wulst zur Verrastung eingreift. Ferner kann der Boden der Kappe mit einer nach innen ragenden und in die Längsbohrung des Schaftes eingreifenden kegelstumpfförmigen Wölbung versehen sein. Durch diese Wölbung wird zum einen die Abdichtung der Längsbohrung verbessert, und zum anderen eine Verstärkung des Bodens erreicht, so daß sich eine höhere Rückstellkraft der Kappe ergibt.To hold the cap on the shaft, the latter has a circumferential groove at its front end, into which a bead arranged on the inner wall of the cap engages for latching. Furthermore, the bottom of the cap can be provided with an inwardly projecting, frustoconical curvature which engages in the longitudinal bore of the shaft. This curvature on the one hand improves the sealing of the longitudinal bore, and on the other hand reinforces the base, so that there is a higher restoring force of the cap.

In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispieles näher erläutert.In the drawing, the invention is explained in more detail using an exemplary embodiment.

Es zeigen:

Figur 1
den Injektionspacker mit aufgesetzter Kappe im Schnitt,
Figur 2
eine stirnseitige Ansicht des Injektionspackers und
Figur 3
das vordere Ende des Injektionspackers während der Injektion.
Show it:
Figure 1
the injection packer with the cap on,
Figure 2
an end view of the injection packer and
Figure 3
the front end of the injection packer during the injection.

Der Injektionspacker 1 ist mit seinem Kernteil 2 aus schlagfestem Kunststoff hergestellt, wobei der Anschluß 3 einstückig am Schaft 4 angeformt ist. Im Zweikomponenten-Spritsgußverfahren ist auf das Kernteil 2 eine aus weicherem Kunststoff bestehende Dichtmanschette 5 aufgespritzt, die durch elastische Verformung zum einen den Halt des Injektionspackers 1 im Bohrloch 6 des Betonteiles 7 und zum anderen die Abdichtung bewirkt. Zu diesem Zweck weist die Dichtmanschette 5 mehrere umlaufende Ringbunde 8 auf, die einen etwas größeren Außendurchmesser aufweisen als der Bohrlochdurchmesser. Auf die vordere Stirnseite des Injektionspackers ist eine Kappe 9 aufgesetzt, die mit einem an ihrer Innenwand angeordneten Wulst 10 in eine umlaufende Nut 11 des Injektionspackers 1 zur Verrastung der Kappe eingreift. Der Boden der Kappe 9 ist mit konzentrisch zur Mittelachse und außerhalb der Längsbohrung 12 des Schaftes 4 angeordneten Durchbrechungen 13 versehen. Das Mittelteil des Bodens bildet im drucklosen Zustand einen Verschluß der Längsbohrung 12. Zur Verbesserung der Abdichtung und Versteifung des Bodens ist dieses Mittelteil als kegelstumpfförmige Wölbung 14 ausgebildet, die mit ihrer Schrägfläche in die Längsbohrung 12 des Injektionspackers 1 eingreift.The injection packer 1 is made with its core part 2 from impact-resistant plastic, the connector 3 being integrally formed on the shaft 4. In the two-component injection molding process, a sealing sleeve 5 made of softer plastic is sprayed onto the core part 2, which, on the one hand, causes the injection packer 1 to hold in the borehole 6 of the concrete part 7 and, on the other hand, seals. For this purpose, the sealing sleeve 5 has a plurality of circumferential ring collars 8, which have a slightly larger outer diameter than the borehole diameter. A cap 9 is placed on the front end of the injection packer and engages with a bead 10 arranged on its inner wall in a circumferential groove 11 of the injection packer 1 in order to lock the cap. The bottom of the cap 9 is provided with openings 13 arranged concentrically to the central axis and outside the longitudinal bore 12 of the shaft 4. The middle part of the bottom forms a closure of the longitudinal bore 12 in the unpressurized state. To improve the sealing and stiffening of the bottom, this middle part is designed as a frustoconical curvature 14 which engages with its inclined surface in the longitudinal bore 12 of the injection packer 1.

Zum Injizieren wird der Injektionspackers 1 in das Bohrloch 6 eines Bauteiles 7 mit Hammerschlägen eingetrieben. Nach dem Aufschieben des mit einem entsprechenden Kupplungsstück versehenen Schlauches (nicht dargestellt) auf den Anschluß 3 des Injektionspackers 1 wird das mineralische Bindemittel mit einer Förderpumpe durch die Längsbohrung 12 des Injektionspackers 1 in die Sacklochbohrung eingepreßt. Mit einem Druck von ca. 10 - 20 bar dringt das Bindemittel durch die Wandung der Sacklochbohrung in das Material des Bauteiles 7 zu dessen Verdichtung ein. Durch den Spritzdruck des Bindemittels wird der Boden der Kappe 9 von der Stirnseite des Injektionspackers soweit abgehoben, daß das Bindemittel durch die Längsbohrung 12 und die Durchbrechungen 13 der Kappe 9 in das Bohrloch fließen kann. Nach Beendigung der Injektion und Abbau des Druckes legt sich der Boden der Kappe 9 aufgrund ihrer Elastizität an die Stirnseite des Injektionspackers an, so daß durch die Schrägflächen der Wölbung 14 die Längsbohrung 12 des Injektionspackers wieder abgedichtet wird. Somit wird ein Rückfluß des Bindemittels verhindert.For injection, the injection packer 1 is driven into the borehole 6 of a component 7 with hammer blows. After the hose (not shown) with a corresponding coupling piece has been pushed onto the connection 3 of the injection packer 1, the mineral binder is pressed into the blind hole with a feed pump through the longitudinal bore 12 of the injection packer 1. With a pressure of approx. 10 - 20 bar, the binder penetrates through the wall of the blind hole into the material of the component 7 to compress it. The spray pressure of the binder causes the bottom of the cap 9 to be lifted from the end of the injection packer to such an extent that the binder can flow through the longitudinal bore 12 and the openings 13 in the cap 9 into the borehole. After completion of the injection and reduction of the pressure, the base of the cap 9 rests on the end face of the injection packer due to its elasticity, so that the longitudinal bore 12 of the injection packer is sealed again by the inclined surfaces of the arch 14. This prevents back flow of the binder.

Claims (3)

  1. An injection plug (1) for injecting in particular mineral bonding agent into building components, the injection plug having a connector (3) for a line supplying the bonding agent, a valve preventing back-flow of the bonding agent and a shank (4) of plastics material provided with a longitudinal bore (12), characterized in that the connector (3) is moulded integrally with the shank (4) at the rear end thereof, and the valve is formed by a cap (9) positioned on the leading end face of the shank (4), the base of which cap has openings (13) arranged concentrically with respect to the centre line and outside the longitudinal bore (12) of the shank.
  2. An injection plug according to claim 1, characterized in that the shank (4) has at its leading end a circumferential groove (11) in which a projection (10) arranged on the inner wall of the cap (9) engages.
  3. An injection plug according to claim 1, characterized in that the base of the cap (9) has an inwardly projecting bulge (14) in the form of a truncated cone which engages in the longitudinal bore (12) of the shank (4).
EP92106830A 1991-06-19 1992-04-22 Injector plug Expired - Lifetime EP0519180B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4120212A DE4120212A1 (en) 1991-06-19 1991-06-19 INJECTION PACKER
DE4120212 1991-06-19

Publications (2)

Publication Number Publication Date
EP0519180A1 EP0519180A1 (en) 1992-12-23
EP0519180B1 true EP0519180B1 (en) 1995-07-19

Family

ID=6434284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106830A Expired - Lifetime EP0519180B1 (en) 1991-06-19 1992-04-22 Injector plug

Country Status (4)

Country Link
EP (1) EP0519180B1 (en)
AT (1) ATE125326T1 (en)
DE (2) DE4120212A1 (en)
ES (1) ES2076603T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743374B1 (en) * 1996-01-09 1998-12-18 Sotafi Sa NON-RETURN INJECTION INSERT, PRESSURE SLIDE
FR2751704B1 (en) * 1996-07-29 1998-10-23 Basso Jean Jacques Louis Andre INSERT WITH ANTI-RETURN FUNCTION AND APPLICATION TO AN ANKLE FOR THE INJECTION OF A FLUID PRODUCT INTO A STRUCTURE TO BE TREATED OR FILLED
CN113294008B (en) * 2021-05-29 2022-07-29 重庆海发工程项目管理咨询有限公司 Building crack repairing method

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2205823A1 (en) * 1972-02-08 1973-08-16 Bergwerksverband Gmbh GLUED-IN TUBE-SHAPED DRILL HOLE PLUG FOR INJECTION DRILL HOLES
DE2315859C2 (en) * 1973-03-30 1985-03-07 International Intec Co. Ets., Vaduz Anchor bolts
DE2903137C3 (en) * 1979-01-27 1982-02-18 Bergwerksverband Gmbh, 4300 Essen Tubular lost wellbore closure
NO149642C (en) * 1981-06-22 1984-05-23 Ole Petter Michelsen HOLE PLUG ENVIRONED BY A FLEXIBLE EXTENSIBLE AND SEALING MATERIAL FOR INJECTING FLUIDUM IN MOUNTAIN FORM AND SIMILAR STRUCTURES
DE3320428A1 (en) * 1983-06-06 1984-12-06 Hilti Ag, Schaan Closure element for boreholes
DE3325931C1 (en) * 1983-07-19 1984-07-19 Gerd 5810 Witten Drespa Borehole seal for shallow and deep resinating
DE3405469C2 (en) * 1984-02-16 1986-04-24 MC-Bauchemie Müller GmbH & Co, Chemische Fabrik, 4300 Essen Packer for sealing the annular space of boreholes
DE8536534U1 (en) * 1985-12-27 1986-02-20 Remmertz, Helmut, 4050 Mönchengladbach Impactable injection packer
DE3627627A1 (en) * 1986-08-14 1988-02-18 Kremer Hans Dieter Injection packer
DE8810323U1 (en) * 1988-01-15 1989-01-19 Remmertz, Erika, 4050 Mönchengladbach Injection device for injecting liquid substances into cracked building structures
DE8813495U1 (en) * 1988-01-15 1989-01-26 Remmertz, Erika, 4050 Mönchengladbach Injection packer for injecting liquid substances into cracked structures with a valve
DE3902925A1 (en) * 1989-02-01 1990-08-02 Fischer Artur Werke Gmbh INJECTION PACKER FOR INJECTING MINERAL BINDING AGENT IN COMPONENTS

Also Published As

Publication number Publication date
DE59202919D1 (en) 1995-08-24
DE4120212A1 (en) 1992-12-24
ES2076603T3 (en) 1995-11-01
ATE125326T1 (en) 1995-08-15
EP0519180A1 (en) 1992-12-23

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