[go: up one dir, main page]

EP0809741A1 - Injection plug and injection method - Google Patents

Injection plug and injection method

Info

Publication number
EP0809741A1
EP0809741A1 EP96934876A EP96934876A EP0809741A1 EP 0809741 A1 EP0809741 A1 EP 0809741A1 EP 96934876 A EP96934876 A EP 96934876A EP 96934876 A EP96934876 A EP 96934876A EP 0809741 A1 EP0809741 A1 EP 0809741A1
Authority
EP
European Patent Office
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.)
Granted
Application number
EP96934876A
Other languages
German (de)
French (fr)
Other versions
EP0809741B1 (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.)
PPW-POLYPLAN WERKZEUGE GmbH
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
Publication of EP0809741A1 publication Critical patent/EP0809741A1/en
Application granted granted Critical
Publication of EP0809741B1 publication Critical patent/EP0809741B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Materials For Medical Uses (AREA)
  • Pens And Brushes (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Detergent Compositions (AREA)

Abstract

A packer and a corresponding method for filling cracks in concrete structures with packing material pumped into the crack. The packer comprises a packer body (1) designed to be inserted into a hole (2) drilled in the structure to be repaired, said packer body having a part (8) with a conical outer surface and a seal (7) around the packer body; a fixing tube (13) which, when the packer is in the hole, protrudes out of the hole; and a check valve (6) in the packer body, located on the opposite side of the seal with respect to the fixing tube, which check valve opens into the hole and communicates with the outer end (4) of the fixing tube via a hole (5) going through the packer body and the fixing tube. According to the invention, the packer body and the fixing tube form a single, continuous cast integral body and the seal (7) consists of an elastic tube of constant circular cross section which can slide between and around the fixing tube and the conical part (8) of the packer body.

Description

INJECTION PLUG AND INJECTION METHOD
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. In concrete structures, such as bridges, sup¬ porting walls, foundations, pillars, girders and vari¬ ous underground tunnels, cracks appear when the tensi¬ on exceeds the tensile strength of the concrete. Such cracks significantly reduce the strength and service life of the structure. The formation of cracks is mostly due to factors resulting from faulty design, over-stressing, movement of structures, excessive con¬ struction joints or defective work. Such cracks, gene¬ rally less than one millimetre wide, extending over a large area and reaching the reinforcement, reduce the service life of the structure as the reinforcement un¬ dergoes faster corrosion, and lead to a reduced strength of the structure. Especially cracks appearing in rock often lead to significant water damage as a- ter flows through them into constructions.
Generally it is assumed that a cracked struc¬ ture can be restored to its original strength by the injection method. 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 procedu¬ 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. When the sleeve is screwed onto the plug, it causes the seal to be pressed against the interior surface of the hole. 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. After use, 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 worst problem with prior-art packers is that they have a complicated construction and are the¬ refore expensive. The task of connecting the fixing tube to the packer and especially detaching it from it, often in difficult working conditions, signifi¬ cantly retards the injection job. Depending on the job, as many as thousands of packers are needed, so their use should be as quick and simple as possible; being used in large quantities, they involve signifi- cant additional costs if they are expensive.
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.
As for the features characteristic of the in¬ vention, reference is made to the claims.
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. Moreover, 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.
According to the invention, 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. Further¬ more, according to the invention, 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. Preferably 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. Thus, 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. In the injection procedure of the invention, the above-described packer according to the invention is used. In the procedure, the unitary integral body formed by the fixing tube and the packer body is in¬ serted, with a grip by the fixing tube, into a hole drilled in the structure to be repaired. 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. Thus, the packer is very cheap to manufacture. Moreover, 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. In addition, 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.
In the following, the invention is described in detail by the aid of the attached drawings, in which
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, and 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.
Disposed around the transverse aperture 11 is an elastic rubber sheath, covering the outlets of the aperture 11. Thus, the transverse aperture 11 and the sheath 12 form a check valve that permits outward flow from the hole 5 through the aperture 11 and out from under the sheath 12 while preventing reverse flow back into the hole 5. 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. 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. Referring to Fig. 2 and 3, the packer presen¬ ted in Fig. 1 is used as follows. A hole 2 has been drilled in the structure to be treated. In concrete structures, 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. Next, 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. When this is done, 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. In this way, 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.
The invention has been described above by presenting an example by the aid of the attached dra¬ wings, but different embodiments of the invention are possible within the framework of the inventive idea defined by the claims.

Claims

1. Packer for filling cracks in concrete structures with packing material pumped into the crack, said packer comprising - a packer body (1) designed to be inserted into a hole (2) drilled in the structure to be repaired, said packer body having a part (8) with a conical ou¬ ter surface, a seal (7) being provided around the packer body, - a fixing tube (13) which, when the packer is in the hole, protrudes out of the hole,
- a check valve (6) in the packer body, located on the opposite side of the seal with respect to the fixing tube, said check valve opening into the hole and communicating with the outer end (4) of the fixing tube via a hole (5) going through the packer body and the fixing tube, c h a r a c t e r i z e d in that the packer bo¬ dy and the fixing tube form a single, continuous cast integral body and the seal (7) consists of an elastic tube of constant circular cross-section, slidable bet¬ ween and around the fixing tube and the conical part (8) of the packer body.
2. Packer as defined in claim 1, c h a r a c - t e r i z e d in that the outer end of the fixing tube
(13) is provided with a draw stop (9), by which it can be drawn outwards.
3. Packer as defined in claim 2, c h a ra c ¬ t e r i z e d in that the draw stop (9) consists of a boss at the outer end of the fixing tube.
4. Packer as defined in any one of claims 1 - 3, c h a ra c t e r i z e d in that the wider end of the conical part (8), the end pointing toward the check valve, is provided with a limiter (10), which is drawn up into contact with the edge of the seal (7) when the packer is being mounted in the hole.
5. Packer as defined in any one of claims 1 - 4, c h a r a c t e r i z e d in that the check valve (6) is formed by an outlet aperture (11) transverse with respect to the longitudinal direction of the hole (5) and an elastic sheath (12) covering it.
6. Packer as defined in claim 5, c h a r a c ¬ t e r i z e d in that the elastic sheath (12) consists of a straight elastic tube of constant circular cross- section.
7. Packer as defined in claim 1, c h a r a c - t e r i z e d in that the integral body is a plastic body produced by the injection moulding technique.
8. Packer as defined in claim 1, c h a r a c ¬ t e r i z e d in that the fixing tube (13) forms a straight extension of uniform thickness to the conical part (8) of the packer body (1) .
9. Injection method for filling cracks in concrete structures with packing material pumped into the crack via a packer comprising
- a packer body (1) designed to be inserted into a hole (2) drilled in the structure to be repaired, said packer body having a part (8) with a conical ou¬ ter surface and a seal (7) around the packer body,
- a fixing tube (13) which, when the packer is in the hole, protrudes out of the hole, - a check valve (6) in the packer body, located on the opposite side of the seal with respect to the fixing tube, said check valve opening into the hole and communicating with the outer end (4) of the fixing tube via a hole (5) going through the packer body and the fixing tube, c h a r a c t e r i z e d in that the method in¬ volves performing the following steps:
- the unitary, injection-moulded integral body formed by the fixing tube (13) and the packer body (1) is inserted into the hole (2) , - the integral body is tightened in the hole by holding the seal (7) immovable in the hole and pulling outwards by the fixing tube,
- packing material is pumped through the packer into the hole,
- the part of the fixing tube remaining outside the hole is broken off, and
- the hole is patched up.
EP96934876A 1995-11-15 1996-11-04 Injection plug and injection method Expired - Lifetime EP0809741B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI955515A FI955515A0 (en) 1995-11-15 1995-11-15 Injekteringspropp
FI955515 1995-11-15
PCT/FI1996/000590 WO1997018367A1 (en) 1995-11-15 1996-11-04 Injection plug and injection method

Publications (2)

Publication Number Publication Date
EP0809741A1 true EP0809741A1 (en) 1997-12-03
EP0809741B1 EP0809741B1 (en) 1998-07-08

Family

ID=8544396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96934876A Expired - Lifetime EP0809741B1 (en) 1995-11-15 1996-11-04 Injection plug and injection method

Country Status (7)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100425786C (en) * 2006-07-14 2008-10-15 山东省建筑科学研究院 Self-pressing crack treating device and construction technique

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE509139C2 (en) * 1997-04-10 1998-12-07 Skanska Anlaeggning Ab Ways to simultaneously seal cracks around boreholes and anchor a rock bolt, as well as rock bolt
DE19911259B4 (en) * 1999-03-13 2015-07-02 Hilti Aktiengesellschaft Auxiliary device for filling boreholes with mortar masses
SE9901153L (en) * 1999-03-30 2000-01-24 Bengt Arvidsson Method and apparatus for injecting curable pulp into cavities, whereby the pulp is vibrated
FR2886325B1 (en) 2005-05-30 2008-05-30 Charline Marie Henriet Lemaire CONTROLLED INJECTION PISTOL OF CLAMS IN LOCAL AREAS OF WORKS HAVING WATER SEALING DEFECTS
JP4522341B2 (en) * 2005-08-05 2010-08-11 Ｆｓテクニカル株式会社 Injection nozzle and pinning method using the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT368248B (en) * 1980-01-30 1982-09-27 Scheiber Wilfried INJECTION PACKER FOR HOLE HOLE CLOSURES
DE3203871A1 (en) * 1982-02-05 1983-08-18 Artur Dr.H.C. 7244 Waldachtal Fischer HIGH PRESSURE PACKER FOR INJECTING RESIN IN CONCRETE Cracks
DE3724559A1 (en) * 1987-07-24 1989-02-02 Hilti Ag METHOD FOR STRENGTHENING TORN COMPONENTS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9718367A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100425786C (en) * 2006-07-14 2008-10-15 山东省建筑科学研究院 Self-pressing crack treating device and construction technique

Also Published As

Publication number Publication date
DE69600413D1 (en) 1998-08-13
ATE168159T1 (en) 1998-07-15
WO1997018367A1 (en) 1997-05-22
AU7300896A (en) 1997-06-05
FI955515A0 (en) 1995-11-15
EP0809741B1 (en) 1998-07-08
DK0809741T3 (en) 1999-04-19
DE69600413T2 (en) 1999-04-15

Similar Documents

Publication Publication Date Title
US10214923B2 (en) Sealing plug for closing holes in walls and the like
US20210017860A1 (en) Mining hydraulic constant-resistance deforming and automatic pressure relieving anchor rod and working method thereof
US4555295A (en) Adhesive filler apparatus
US4382720A (en) Injection liner for a borehole closure
RU2012755C1 (en) Device for mortar injection into concrete cracks
US3984988A (en) Obturating device, especially for injection tubes
US4555286A (en) Apparatus for and a method of repairing by filling with an adhesive
CA2915914C (en) Sealing plug for closing holes in walls and the like
US4948301A (en) Device comprising a valve for injecting grout around or inside a tubular pile driven into the ground
EP0809741B1 (en) Injection plug and injection method
US5809736A (en) Method and apparatus for injecting concrete repairing agent into a concrete structure
CA1240288A (en) Adhesive-filling apparatus and method
KR200198979Y1 (en) Packer for grouting of concrete structure and the grouting method using with that
CN110374352A (en) Concrete wall glue injection method and non-return streamer rubber head
CN104453763A (en) Sealing anchoring member for casing patching and mounting device thereof
AU743944B2 (en) Dispenser and delivery arrangement of a flowable preparation
CN115852901A (en) Embankment piping plugging device and embankment piping plugging method
EP2561176A1 (en) Device for sealing a rock wall
JP4504563B2 (en) Device for sealing a rock wall and device for reinforcing and sealing a rock wall
JP4336169B2 (en) How to install rock bolts
JP4942145B2 (en) Mouth stop device
CN220827692U (en) Sealing structure of anchorage device and steel strand
CN2244090Y (en) Shearing high temperature resistance anti-corrosion oil drainage device
CN212803150U (en) Oil pipe inner plug
JP2828237B2 (en) Anchor body formation method and lip packer used for this

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19970811

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK FI FR GB IT LI NL SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19971219

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK FI FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 168159

Country of ref document: AT

Date of ref document: 19980715

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69600413

Country of ref document: DE

Date of ref document: 19980813

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: BUGNION S.A.

ET Fr: translation filed
REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19991124

Year of fee payment: 4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 19991125

Year of fee payment: 4

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: HAAVISTO, JUHA TRANSFER- PPW-POLYPLAN WERKZEUGE GM

NLS Nl: assignments of ep-patents

Owner name: PPW-POLYPLAN WERKZEUGE GMBH

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001130

BERE Be: lapsed

Owner name: HAAVISTO JUHA

Effective date: 20001130

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051104

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FI

Payment date: 20141111

Year of fee payment: 19

Ref country code: SE

Payment date: 20141124

Year of fee payment: 19

Ref country code: GB

Payment date: 20141105

Year of fee payment: 19

Ref country code: DE

Payment date: 20141103

Year of fee payment: 19

Ref country code: CH

Payment date: 20141125

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20141129

Year of fee payment: 19

Ref country code: AT

Payment date: 20141126

Year of fee payment: 19

Ref country code: FR

Payment date: 20141201

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 69600413

Country of ref document: DE

Representative=s name: ELBPATENT - MARSCHALL & PARTNER PARTGMBB, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69600413

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 168159

Country of ref document: AT

Kind code of ref document: T

Effective date: 20151104

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20151104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151130

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151130

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20151201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160729

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151104

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151104

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151104