WO1997018367A1 - Tampon et procede d'injection - Google Patents

Tampon et procede d'injection Download PDF

Info

Publication number
WO1997018367A1
WO1997018367A1 PCT/FI1996/000590 FI9600590W WO9718367A1 WO 1997018367 A1 WO1997018367 A1 WO 1997018367A1 FI 9600590 W FI9600590 W FI 9600590W WO 9718367 A1 WO9718367 A1 WO 9718367A1
Authority
WO
WIPO (PCT)
Prior art keywords
packer
hole
fixing tube
seal
check valve
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.)
Ceased
Application number
PCT/FI1996/000590
Other languages
English (en)
Inventor
Juha Haavisto
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP96934876A priority Critical patent/EP0809741B1/fr
Priority to AU73008/96A priority patent/AU7300896A/en
Priority to DE69600413T priority patent/DE69600413T2/de
Priority to DK96934876T priority patent/DK0809741T3/da
Publication of WO1997018367A1 publication Critical patent/WO1997018367A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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 present invention relates to a packer as defined in the preamble of claim 1 and to an injection method as defined in the preamble of claim 9.
  • a packer as defined in the preamble of claim 1 and to an injection method as defined in the preamble of claim 9.
  • Injection is generally performed by pumping injection material into the crack through a packer using pressure generated by means of a manual or mechanical injection device, the crack being packed with the mixture solidifying in it.
  • the mixture is introduced using disposable connectors, which are pla ⁇ ced in holes made around or in the crack so that they remain in position while a liquid mixture is being pumped into the crack.
  • a suitable injection pressure and the distances between injection points are deter ⁇ mined via a preliminary test carried out prior to the operation.
  • a known device currently used in the proceedu ⁇ re described above is a packer comprising a rubber se ⁇ al around a plug placed in the hole.
  • the rubber seal is pressed into the hole by means of a tightening sleeve placed at the outer end of the plug, said slee ⁇ ve being provided with a thread.
  • a tightening sleeve placed at the outer end of the plug, said slee ⁇ ve being provided with a thread.
  • the inner end of the plug is provided with a check valve, formed by a ball and a spring, designed to prevent the mass forced into the crack from flowing back through the plug.
  • the tightening element can be de- tached from the rest of the packer, so it can be used several times.
  • Patent specification CH 644662 and patent applications WO 84/01601 and FI 821905 present packers which, in respect of both structure and operation, substantially correspond to the one described above.
  • the object of the present invention is to eliminate the drawbacks referred to above.
  • a specific object of the invention is to produce a new type of packer which, both in respect of construction and use, is as simple as possible and reliably seals and closes the hole in all possible pressure conditions.
  • the packer of the invention comprises a packer body designed to be inserted into a hole dril ⁇ led in a structure to be mended, said packer body ha ⁇ ving a part with a conical outer surface, a seal being provided around the packer body.
  • the packer comprises a fixing tube which, when the packer is in the hole, protrudes out of the hole, and in the packer body a check valve which, with respect to the fixing tube, is located on the opposite side of the seal and opens into the hole, said check valve communicating with the outer end of the fixing tube via a hole going through the packer body and the fixing tube.
  • the packer body and the fixing tube are implemented as a single, con ⁇ tinuous integral body, preferably fabricated from plastic by the injection moulding technique.
  • the seal is as simple as possible in construction, in other words, it consists of an elastic tube of constant circular cross-section which can slide between and around the fixing tube and the conical part of the packer body, in other words, the seal is a straight piece of elas ⁇ tic tube.
  • the outer end of the fixing tube is prefera ⁇ bly provided with a draw stop, such as a lobe, set- off, indentation or other irregularity or relief of surface allowing the packer to be gripped firmly with a suitable tool so that it can be vigorously pulled outward from the hole while the seal is being held in place in the hole.
  • a draw stop such as a lobe, set- off, indentation or other irregularity or relief of surface allowing the packer to be gripped firmly with a suitable tool so that it can be vigorously pulled outward from the hole while the seal is being held in place in the hole.
  • the outer end of the fi ⁇ xing tube is so shaped that the nozzle of the injecti ⁇ on device can be tightly connected to the packer wit ⁇ hout a separate injection cock or grease nipple.
  • the inner end of the conical packer body of the packer i.e.
  • the body end pointing toward the check valve is preferably provided with a limit stop, such as an annular collar, which forms a stopper that hits the stationary seal when the packer is being pul- led outwards from the hole.
  • a limit stop such as an annular collar, which forms a stopper that hits the stationary seal when the packer is being pul- led outwards from the hole.
  • the limit stop pre ⁇ vents the packer from being pulled out too far.
  • the flange receives the counterpressure generated in the course of the injection work and utilizes this pressu ⁇ re to squeeze the packer more tightly in the bore ho ⁇ le.
  • the valve at the inner end of the body is formed by a transverse aperture in the body, the packer body being provided with a longitudinal hole extending from its outer end towards the inner end down to this transverse aperture, and by an elastic sheath placed on the outlet or outlets of the trans- verse aperture. Due to its elasticity, this sheath blocks the outlet or outlets in normal conditions, thus acting as a check valve during injection.
  • the elastic sheath preferably also consists of a straight piece of elastic tube.
  • the integral body is tightened in the hole by holding the seal around it immovable in the hole and pulling at the fi ⁇ xing tube by its outer end, causing the seal to be squeezed between the interior surface of the hole and the conical part of the packer. After this, packing material can be pumped through the packer into the ho ⁇ le. Either immediately thereupon or later after the injected mass has settled down, the part of the fixing tube remaining outside the hole is broken off e.g. by simply applying a transverse blow to the base of the fixing tube, whereupon the hole can be patched up.
  • the packer and injection method of the inven ⁇ tion have significant advantages as compared with pri ⁇ or art.
  • the invention is very simple in construction, only consisting of a body piece, which can be fabrica ⁇ ted in a simple manner e.g. by the injection moulding technique, and two tubular sheaths of elastic material placed around it.
  • the packer is very cheap to manufacture.
  • the packer is easy to use and it can be mounted in place using a suitable tool with one hand and only a small effort.
  • the packer can be easily broken off from the hole, leaving the pressure in the structure, so the hole can be cap ⁇ ped even in connection with the same operation.
  • Fig. 1 presents a packer as provided by the invention, partially sectioned
  • Fig. 2 shows how the packer of Fig. 1 is in ⁇ serted into a hole
  • Fig. 3 shows the packer of Fig. 1, mounted in a hole and ready for use.
  • a packer according to the invention as shown in Fig. 1 comprises an elongated packer body 1 having a relatively pointed inner end 3 and a tubular fixing tube 13 forming a straight and seamless extension of the packer body and provided with an outer end 4 ha ⁇ ving a round shape resembling a grease nipple.
  • Inside the packer body and fixing tube there is a longitudi ⁇ nal hole 5 extending from the outer end 4 to a point close to the inner end 3 of the packer body, opening to the exterior surface of the packer body via a transverse aperture 11.
  • the packer body 1 comprises a conical part 8 of circular cross-section, extending from the valve towards the outer end of the packer body and tapering towards the outer end and the fixing tube. After the conical part there is a fixing tube 13 of uniform thickness, ending at a shoulder or draw stop 9. The conical part 8 thus widens towards the inner end 3 of the packer body 1, ending before the valve at an ex ⁇ pansion of the packer body, a ring-like collar forming a limiter 10.
  • a ring-shaped collar is also formed in the packer body 1 on the side facing towards the check valve 6, so that the pressure prevailing in the hole is applied to this collar, pressing the packer body outwards and tightening the packer in a manner to be described later on.
  • a seal 7 Fitted around the straight fixing tube 13 and the conical part 8 is a seal 7 made of elastic and flexible material, e.g. a piece of rubber hose, which is of a size that allows it to slide on both the straight part and the conical part between the draw stop 9 and the limiter 10.
  • the length of the seal 7 is substantially shorter than the lengths of the fixing tube 13 and the conical part 8 together.
  • a hole 2 has been drilled in the structure to be treated.
  • the mouth of the hole is generally more or less ragged.
  • the packer is inserted into the hole with the seal 7 substantially in the area of the straight fixing tube 13.
  • the packer is inserted to a depth such that the seal 7 lies completely in the undamaged hole area, somewhat sunk in from the mouth of the hole.
  • a pressure is applied to the upper edge of the seal 7 in the direction of arrows A to hold it in po ⁇ sition while at the same time gripping the draw stop 9 at the outer end 4 and drawing it straight outwards as indicated by arrow B.
  • the packer is preferably mounted using a special mounting tool by means of which the seal can be held in position and a pull exerted on the draw stop at the same time.
  • the co ⁇ nical part 8 of the packer body 1 is thrust into the seal 7, pressing the seal against the interior surface of the hole.
  • the pulling action B is continued until the limiter 10 hits the lower edge of the seal 7.
  • the seal has been squeezed very tightly bet- ween the conical surface 8 and the interior surface of the hole 2, whereupon it is possible, in a manner known in itself, to attach a hose or connector to the outer end 4 of the packer body 1 to inject suitable packing material into the hole 2 while the check valve 6 prevents the mass from flowing back into the hole 5.
  • the conical shape of the body ensures that the packer cannot be pushed out of the hole by the counterpressu- re generated in the hole and the crack, because the pressure is applied to the body 1 and especially to the flange 10, which is pressed against the seal 7, thus squeezing it more tightly in the hole.
  • the packer is preferably fabricated from a suitable plastic material e.g. by the injection moul ⁇ ding technique, and the part of the packer remaining above the seal 7 can easily be broken off from the ho ⁇ le 2 and the hole can be capped using suitable materi ⁇ al. According to the tests carried out, the packer of the invention is fully pressure-proof, having a pres ⁇ sure resistance of at least 250 bar, yet it performs perfectly in low-pressure injection as well, which may involve the use of pressures below 10 bar.

Landscapes

  • 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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Detergent Compositions (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Materials For Medical Uses (AREA)
  • Pens And Brushes (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

Ensemble d'étanchéité et procédé correspondant permettant de remplir des fissures dans des structures en béton avec un matériau d'étanchéité introduit par pompage dans la fissure. Cet ensemble d'étanchéité comprend un corps d'étanchéité (1) conçu pour être introduit dans un trou (2) percé dans la structure à réparer, ledit corps possédant une partie (8) comportant une surface extérieure conique et un joint (7) autour dudit corps; un tube de fixation (13) qui, lorsque l'ensemble d'étanchéité est dans le trou, forme une saillie hors du trou; un clapet de retenue (6) situé dans le corps du côté opposé au joint par rapport au tube de fixation, ledit clapet s'ouvrant vers l'intérieur du trou et communiquant avec l'extrémité extérieure (4) du tube de fixation par l'intermédiaire d'un passage (5) traversant le corps et le tube de fixation. D'après l'invention, le corps d'étanchéité et le tube de fixation constituent un corps unique continu moulé en un seul ensemble et le joint (7) consiste en un tube élastique présentant une section transversale circulaire constante pouvant coulisser entre le tube de fixation et la partie conique (8) dudit corps, ainsi qu'autour dudit tube et de ladite partie.
PCT/FI1996/000590 1995-11-15 1996-11-04 Tampon et procede d'injection Ceased WO1997018367A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP96934876A EP0809741B1 (fr) 1995-11-15 1996-11-04 Tampon et procede d'injection
AU73008/96A AU7300896A (en) 1995-11-15 1996-11-04 Injection plug and injection method
DE69600413T DE69600413T2 (de) 1995-11-15 1996-11-04 Einspritzstopfen und einspritzverfahren
DK96934876T DK0809741T3 (da) 1995-11-15 1996-11-04 Injektionsprop og injektionsfremgangsmåde

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI955515 1995-11-15
FI955515A FI955515A0 (fi) 1995-11-15 1995-11-15 Injekteringspropp

Publications (1)

Publication Number Publication Date
WO1997018367A1 true WO1997018367A1 (fr) 1997-05-22

Family

ID=8544396

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1996/000590 Ceased WO1997018367A1 (fr) 1995-11-15 1996-11-04 Tampon et procede d'injection

Country Status (7)

Country Link
EP (1) EP0809741B1 (fr)
AT (1) ATE168159T1 (fr)
AU (1) AU7300896A (fr)
DE (1) DE69600413T2 (fr)
DK (1) DK0809741T3 (fr)
FI (1) FI955515A0 (fr)
WO (1) WO1997018367A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998045576A1 (fr) * 1997-04-10 1998-10-15 Skanska Anläggning Ab Dispositif et procede d'injection
EP1036599A2 (fr) 1999-03-13 2000-09-20 HILTI Aktiengesellschaft Dispositif auxiliaire de remplissage d'un perçage par du mortier
WO2000061917A1 (fr) * 1999-03-30 2000-10-19 Bengt Arvidsson Procede et dispositif pour l'injection de pates durcissables dans des cavites
WO2006129008A3 (fr) * 2005-05-30 2007-03-15 Charline Lemaire Pistolet d'injection d'un produit de colmatage forme par un melange d'au moins deux solutions
EP1917408A4 (fr) * 2005-08-05 2009-04-01 Fs Technical Corp Injecteur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100425786C (zh) * 2006-07-14 2008-10-15 山东省建筑科学研究院 自压力裂缝处理器及施工工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382720A (en) * 1980-01-30 1983-05-10 Wilfried Scheiber Injection liner for a borehole closure
US4512123A (en) * 1982-02-05 1985-04-23 Artur Fischer High-pressure packing device for injecting synthetic resin into cracks in concrete
US4905430A (en) * 1987-07-24 1990-03-06 Hilti Aktiengesellschaft Method of consolidating cracks in a structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382720A (en) * 1980-01-30 1983-05-10 Wilfried Scheiber Injection liner for a borehole closure
US4512123A (en) * 1982-02-05 1985-04-23 Artur Fischer High-pressure packing device for injecting synthetic resin into cracks in concrete
US4905430A (en) * 1987-07-24 1990-03-06 Hilti Aktiengesellschaft Method of consolidating cracks in a structure

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998045576A1 (fr) * 1997-04-10 1998-10-15 Skanska Anläggning Ab Dispositif et procede d'injection
AU722633B2 (en) * 1997-04-10 2000-08-10 Roulunds Codan (Norge) A/S Injection device and injection method
EP1036599A2 (fr) 1999-03-13 2000-09-20 HILTI Aktiengesellschaft Dispositif auxiliaire de remplissage d'un perçage par du mortier
JP2000296353A (ja) * 1999-03-13 2000-10-24 Hilti Ag コーキング装置の補助具
EP1036599A3 (fr) * 1999-03-13 2004-07-07 HILTI Aktiengesellschaft Dispositif auxiliaire de remplissage d'un perçage par du mortier
WO2000061917A1 (fr) * 1999-03-30 2000-10-19 Bengt Arvidsson Procede et dispositif pour l'injection de pates durcissables dans des cavites
WO2006129008A3 (fr) * 2005-05-30 2007-03-15 Charline Lemaire Pistolet d'injection d'un produit de colmatage forme par un melange d'au moins deux solutions
US7942613B2 (en) 2005-05-30 2011-05-17 Charline Lemaire Pistol for injecting a sealing product formed by mixing at least two solutions
EP1917408A4 (fr) * 2005-08-05 2009-04-01 Fs Technical Corp Injecteur
US8579216B2 (en) 2005-08-05 2013-11-12 Fs Technical Corporation Injection nozzle for repairing a wall element

Also Published As

Publication number Publication date
FI955515A0 (fi) 1995-11-15
EP0809741B1 (fr) 1998-07-08
DE69600413T2 (de) 1999-04-15
DK0809741T3 (da) 1999-04-19
EP0809741A1 (fr) 1997-12-03
ATE168159T1 (de) 1998-07-15
AU7300896A (en) 1997-06-05
DE69600413D1 (de) 1998-08-13

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