EP0248653B1 - Abgabe von kurierenden Stoffen - Google Patents

Abgabe von kurierenden Stoffen Download PDF

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Publication number
EP0248653B1
EP0248653B1 EP87304915A EP87304915A EP0248653B1 EP 0248653 B1 EP0248653 B1 EP 0248653B1 EP 87304915 A EP87304915 A EP 87304915A EP 87304915 A EP87304915 A EP 87304915A EP 0248653 B1 EP0248653 B1 EP 0248653B1
Authority
EP
European Patent Office
Prior art keywords
delivery line
flow
base material
hardener
flexible portion
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
EP87304915A
Other languages
English (en)
French (fr)
Other versions
EP0248653A3 (en
EP0248653A2 (de
Inventor
Alexander Milne Bierrum
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.)
Bierrum & Partners Ltd
Original Assignee
Bierrum & Partners Ltd
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 Bierrum & Partners Ltd filed Critical Bierrum & Partners Ltd
Publication of EP0248653A2 publication Critical patent/EP0248653A2/de
Publication of EP0248653A3 publication Critical patent/EP0248653A3/en
Application granted granted Critical
Publication of EP0248653B1 publication Critical patent/EP0248653B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/29—Mixing by periodically deforming flexible tubular members through which the material is flowing

Definitions

  • This invention relates to a method and apparatus for dispensing a curable substance comprising a base material and a hardener therefor.
  • the invention is particularly, though not exclusively, concerned with the repair of reinforced concrete structures. Fine cracks appearing in reinforced concrete structures need to be sealed off to prevent exposure of the reinforcing bars to the elements causing corrosion of the reinforcing bars. This is done by injecting a curable substance, commonly epoxy resin, into the cracks.
  • a curable substance commonly epoxy resin
  • DE-A-2025011 describes a method of providing peristaltic pumping action to a flexible tube.
  • a number of coils of the tube are wound about a cylinder.
  • the pumping action is supplied by rotating rollers, which partially occlude the delivery line and which rotate about their own axis and about the axis of the coils.
  • a method of dispensing a curable substance comprising a base material and a hardener therefor, which method comprises the steps of providing under pressure at a controllable flow rate a flow of base material from a reservoir of base material and a flow of hardener from a reservoir of hardener, combining said flows into a combined flow of base material/hardener mix through a delivery line, and applying a pumping action to the combined flow, characterised in that the base material is heated by a heating element within the delivery line, in that a peristaltic pumping action is applied along a flexible portion of the delivery line by means of a pair of arcuate pivotal pressure shoes compressing the delivery line against a plurality of ball races mounted on a rotor, which cause only partial occlusion of the flexible portion, such that waves of contraction are applied along the delivery line at a rate different from the rate of the combined flow and hardener through the delivery line, which pressure shoes are caused to pivot away from the delivery line as the flexible portion expand
  • the invention also provides apparatus for use in dispensing a curable substance comprising a base material and a hardener therefore, which apparatus comprises a first pumping device to urge under pressure a flow of base material at a controllable flow rate from a reservoir thereof along a first flow path, a second pumping device to urge under pressure a flow of hardener at a controllable flow rate from a reservoir thereof along a second flow path, means to combine said flows into a combined flow of base material/hardener mix through a delivery line, and a third pumping device to apply a pumping action to the combined flow, characterised in that the base material is heated by a heating element within the delivery line and in that the third pumping device applies a peristaltic pumping action along a flexible portion of the delivery line by means of a pair of pivotal arcuate pressure shoes compressing the delivery line against a plurality of ball races mounted on a rotor, which cause only partial occlusion of the flexible portion, and which third pumping device is driven by driving means at
  • FIGs 1 and 2 there is seen a preferred form of apparatus according to the invention.
  • the apparatus is for use in repairing cracks in reinforced concrete structures, as will be described in more detail.
  • the apparatus is portable to enable its use from an access cradle.
  • the apparatus carries a container 10 for the base material, e.g. epoxy resin, and a container 11 for an appropriate hardener.
  • the pumping device 14 is conveniently a pair of ganged peristaltic pumps 15 and 16 working side by side, both driven by a common motor 17, which is conveniently an electric motor. This enables accurate regulation of the delivery of measurable quantities of both base material and hardener.
  • other pumping arrangements may be used instead, for example, using gear pumps.
  • the conduits 12 and 13 lead to a junction 18, such as a T-piece or a Y-piece, connecting to a delivery line 19, also conveniently of plastics tubing.
  • the delivery line 19 is fed through a device 20 which applies to it a kind of peristaltic pumping action as will be described.
  • the device 20 comprises two arcuate pressure shoes 21 and 22 which are pivotally mounted on pivots 23 and 24.
  • the shoes 21 and 22 extend generally around a rotor 25 on which there are mounted a plurality of ball races 26.
  • the rotor 25 is driven by a motor 27, which is conveniently an electric motor, through a gear box 28.
  • the delivery line 19 is fed into the space between the ball races 26 and the pressure shoes 21 and 22.
  • U-bolts 29 at the free ends 30 of the shoes 21 and 22 hold the delivery line 19 in position.
  • the pressure shoes 21 and 22 are biased pivotally towards each other by spring-loaded adjustors 31 and 32 arranged at the free ends 30 of the shoes 21 and 22. It will be seen that the delivery line 19 is compressed between the pressure shoes 21 and 22 and the ball races 26. The delivery line 19 is contracted by each ball race 26 in turn as the rotor 25 rotates, with an effect like a peristaltic pumping action, ie. the line is subjected to repeated waves of contraction.
  • the separation of the shoes 21 and 22 is adjusted so that only partial occlusion of the delivery line 19 is caused.
  • the device 20 is run so that the waves of contraction to which it subjects the delivery line 19 are applied at a differential rate relative to the flow of the base material/hardener mix through the delivery line. That is, the waves of contraction may be applied along the delivery line 19 in the same direction as flow therethrough and at a faster or slower speed, or alternatively, in the opposite direction.
  • the effect is to cause the base material/hardener mix passing through the delivery line to undergo repeated changes of speed and/or direction, thereby encouraging its thorough mixing.
  • the device 20 is run in the same direction as the direction of flow through the delivery line 19 (i.e. anti-clockwise in Figure 2) and at a faster rate.
  • An advantage of doing it this way is that it provides an additional effect of boosting the output pressure. A thorough mixing of the base material and hardener is achieved whilst the output from the delivery line is not of an unduly fluctuating nature.
  • the device 20 is run in the same direction and at least twice as fast as the pumps 15 and 16 delivering the flow to the delivery line 19, and typically the difference may be 40 times.
  • a micro-switch 33 is mounted adjacent the free end 30 of one of the pressure shoes 22. As pressure in the delivery line 19 builds up, there is some expansion of the flexible tubing and this causes outward pivoting of the pressure shoes 21 and 22. The micro-switch 33 trips upon outward pivotal movement of the pressure shoe 22. The position of the micro-switch 33 relative to the pressure shoe 22 can be adjusted so that the micro-switch trips when pressure in the delivery line 19 reaches a predetermined level.
  • the micro-switch 33 is connected to control circuitry which switches off both motors 17 and 27 when the micro-switch trips.
  • the apparatus advantageously includes an air heater 34 for keeping the base material in container 10 fluid in low ambient temperatures.
  • an immersion heater element 35 is provided in the conduit 12 leading from the base material container 10 to the pump 15. There is preferably thermostatic control of the heater element 35, and this may be achieved by using the heater element itself as a thermostat.
  • the immersion heater element 35 has the advantage of enabling ready control of the temperature of the base material drawn from the container 10 regardless of ambient temperature and without the need for pre-heating prior to use of the apparatus. This is of significant practical advantage because the wax point of presently available resins which are used as a base material have their wax point at about 10°C and will therefore normally be too viscous.
  • the apparatus also advantageously includes a variable time switching device 36 in its control circuitry.
  • This device 36 can be set to operate cyclically to run the motors 17 and 27 from time to time to purge the system and prevent clogging due to curing of the base material and hardener while it remains in the delivery line 19. Cleaning of the delivery line and conduits at the end of a job can be effected by passing suitable solvents therethrough. If the delivery line 19 becomes badly blocked, however, it can simply be replaced.
  • the apparatus is suitable for use in the treatment of fine cracks in reinforced concrete structures.
  • the technique is to stick a nipple on the face of the structure at either end of the crack and shutter off the face of the crack between the nipples, using for example, plaster.
  • the curable substance is injected through one of the nipples until it begins to ooze out of the other nipple. Injection is ceased and the nipples are capped and left for the substance to set in the crack.
  • a number of injection nipples may be used in line, with each being capped in turn as the crack is treated along its length.
  • a nipple 50 and cap 51 suitable for use with the above described apparatus.
  • the nipple 50 has a flat surface 52 for sticking onto the face of a concrete structure, a spigot 53 for attachment of the delivery line 19 from the apparatus, and a through bore 54.
  • the spigot 53 has an external profile with a tapered portion 55 leading to a shoulder 56.
  • the end of the line is simply push fitted over the spigot 53, after which a holding ring 57 on the outside of the line is brought up to act as a retaining clamp, as seen in Figure 4.
  • the cap 51 is a simple snap-fit over the spigot 53 of the nipple.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating Apparatus (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (7)

  1. Verfahren zum Abgeben einer aushärtbaren, ein Basismaterial und einen Aushärter umfassenden Substanz,
    welches Verfahren folgende Schritte umfaßt:
    Erzeugen eines Basismaterialstroms aus einem Basismaterialreservoir (10) und eines Aushärterstroms aus einem Aushärterreservoir (11) und zwar jeweils unter Druck und mit steuerbarer Geschwindigkeit,
    Kombinieren der Ströme zu einem kombinierten Strom von Basismaterial/Aushärter-Gemisch durch eine Ausgabeleitung (19) und
    Ausüben einer Pumpwirkung auf den kombinierten Strom,
    dadurch gekennzeichnet, daß
    das Basismaterial in der Ausgabeleitung durch ein Heizelement beheitzt wird, daß
    entlang eines flexiblen Abschnitts der Ausgabeleitung eine peristaltische Pumpwirkung ausgeübt wird mittels eines Paares von gekrümmten, schwenkbaren, die Ausgabeleitung gegen eine Mehrzahl von auf einem Rotor (25) angeordneten Laufringen drückenden Druckschuhen, welche nur partielle Einschnürung des flexiblen Abschnitts bewirken, so daß
    entlang der Ausgabeleitung Kontraktionswellen erzeugt werden, mit einer Geschwindigkeit, die sich von der Geschwindigkeit des kombinierten Stroms von Basismaterial und Aushärter durch die Ausgabeleitung unterscheidet, und wobei die Druckschuhe zum Wegschwenken von der Ausgabeleitung gebracht werden, wenn sich der flexible Abschnitt ausdehnt, wobei die Bewegung dazu benutzt wird, einen Schalter (33) zu betätigen, der den Strom des Basismaterials und des Aushärters zum Aufhören bringt, wenn in der Ausgabeleitung ein vorbestimmtes Druckniveau erreicht ist,
    und ferner dadurch gekennzeichnet, daß der flexible Abschnitt der Ausgabeleitung im wesentlichen eine Einzelschleife bildet, welche leicht zu entfernen ist, wenn das Aushärter-Basismaterial-Gemisch darin fest wird.
  2. Verfahren nach Anspruch 1, bei welchem
    die peristaltische Pumpwirkung derart angelegt wird, daß die Kontraktionswellen in Richtung des kombinierten Stroms des Basismaterials und des Aushärters durch die Ausgabeleitung und mit wenigstens der doppelten Geschwindigkeit des Stroms des Basismaterials und des Aushärters durch die Ausgabeleitung angelegt werden.
  3. Verfahren nach Anspruch 1 oder 2, welches weiterhin den Schritt des Bereitstellens einer thermostatischen Steuerung zur Regelung der Temperatur des Stroms des Basismaterials umfaßt.
  4. Vorrichtung zur Benutzung beim Abgeben einer aushärtbaren, ein Basismaterial und einen Aushärter umfassenden Substanz,
    wobei die Vorrichtung umfaßt:
    eine erste Pumpeinrichtung (15), um unter Druck einen Strom von Basismaterial mit steuerbarer Geschwindigkeit aus einem Basismaterialreservoir (10) entlang eines ersten Strömungswegs (12) zu bewirken,
    eine zweite Pumpeinrichtung (16), um unter Druck einen Strom von Aushärter mit steuerbarer Geschwindigkeit aus einem Aushärterreservoir (11) entlang eines zweiten Strömungswegs (13) zu bewirken,
    Mittel (18) zum Kombinieren der Ströme zu einem kombinierten Strom von Basismaterial/Aushärter-Gemisch durch eine Ausgabeleitung (19) und
    eine dritte Pumpeinrichtung (20) zum Ausüben einer Pumpwirkung auf den kombinierten Strom,
    dadurch gekennzeichnet, daß
    das Basismaterial in der Ausgabeleitung durch ein Heizelement beheitzt wird und daß
    die dritte Pumpeinrichtung entlang eines flexiblen Abschnitts der Ausgabeleitung eine peristaltische Pumpwirkung ausübt mittels eines Paares von gekrümmten, schwenkbaren, die Ausgabeleitung gegen eine Mehrzahl von auf einem Rotor (25) angeordneten Laufringen drückenden Druckschuhen, welche nur partielle Einschnürung des flexiblen Abschnitts bewirken, wobei die dritte Pumpeinrichtung von Antriebsmitteln (27,28) mit einer solchen Antriebsgeschwindigkeit angetrieben wird, daß entlang der Ausgabeleitung Kontraktionswellen erzeugt werden, mit einer Geschwindigkeit, die sich von der Geschwindigkeit des kombinierten Stroms durch die Ausgabeleitung unterscheidet,
    und wobei die Druckschuhe von der Ausgabeleitung wegschwenkbar sind, wenn sich der flexible Abschnitt ausdehnt, und wobei durch diese Bewegung ein Schalter (33) betätigt wird, der den Strom des Basismaterials und des Aushärters zum Aufhören bringt, wenn in der Ausgabeleitung ein vorbestimmtes Druckniveau erreicht ist,
    und ferner dadurch gekennzeichnet, daß der flexible Abschnitt der Ausgabeleitung im wesentlichen eine Einzelschleife bildet, welche leicht zu entfernen ist, wenn das Aushärter-Basismaterial-Gemisch darin fest wird.
  5. Vorrichtung nach Anspruch 4, welche eine thermostatische Steuerung zur Regelung der Temperatur des Stroms des Basismaterials im ersten Strömungsweg (12) umfaßt.
  6. Vorrichtung nach Anspruch 5, bei welcher die thermostatische Steuerung der Temperatur des Stroms im ersten Strömungsweg (12) ein Immersionsheizelement (35) umfaßt.
  7. Vorrichtung nach einem der Ansprüche 4 bis 6, welche eine einstellbare Zeitsteuerung (36) umfaßt, die in einer Weise betreibbar ist, um einen intermittierenden Betrieb der Vorrichtung vorzusehen, um die Ausgabeleitung (19) zu reinigen und Verstopfen zu verhindern.
EP87304915A 1986-06-06 1987-06-03 Abgabe von kurierenden Stoffen Expired - Lifetime EP0248653B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868613779A GB8613779D0 (en) 1986-06-06 1986-06-06 Dispensing curable substances
GB8613779 1986-06-06

Publications (3)

Publication Number Publication Date
EP0248653A2 EP0248653A2 (de) 1987-12-09
EP0248653A3 EP0248653A3 (en) 1989-04-12
EP0248653B1 true EP0248653B1 (de) 1993-05-12

Family

ID=10599046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87304915A Expired - Lifetime EP0248653B1 (de) 1986-06-06 1987-06-03 Abgabe von kurierenden Stoffen

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Country Link
EP (1) EP0248653B1 (de)
DE (1) DE3785791T2 (de)
ES (1) ES2040252T3 (de)
GB (1) GB8613779D0 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101918714B (zh) 2007-12-05 2014-07-23 班奥麦迪克公司 蠕动泵
EP3483440B1 (de) 2017-11-08 2020-05-27 Oina VV AB Peristaltische pumpe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3489393A (en) * 1967-03-31 1970-01-13 Instrumentation Labor Inc Fluid mixing system
DE1943573A1 (de) * 1969-08-27 1971-05-06 Bischoff Geb Mormann Mischvorrichtung
DE2025011A1 (en) * 1970-05-22 1971-12-02 Popp B Flexible wall mixing process - for liquid pasty granular materials - using peristaltic motion

Also Published As

Publication number Publication date
EP0248653A3 (en) 1989-04-12
DE3785791D1 (de) 1993-06-17
ES2040252T3 (es) 1993-10-16
DE3785791T2 (de) 1993-08-12
GB8613779D0 (en) 1986-07-09
EP0248653A2 (de) 1987-12-09

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