EP1730353B1 - A concrete working machine - Google Patents

A concrete working machine Download PDF

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Publication number
EP1730353B1
EP1730353B1 EP05722216A EP05722216A EP1730353B1 EP 1730353 B1 EP1730353 B1 EP 1730353B1 EP 05722216 A EP05722216 A EP 05722216A EP 05722216 A EP05722216 A EP 05722216A EP 1730353 B1 EP1730353 B1 EP 1730353B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
concrete
feed beam
carriage
working
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.)
Not-in-force
Application number
EP05722216A
Other languages
German (de)
French (fr)
Other versions
EP1730353A1 (en
Inventor
Carl kesson STRÖMDAHL
Kjell Nilsson
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.)
Conjet AB
Original Assignee
Conjet AB
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 Conjet AB filed Critical Conjet AB
Publication of EP1730353A1 publication Critical patent/EP1730353A1/en
Application granted granted Critical
Publication of EP1730353B1 publication Critical patent/EP1730353B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
    • E01C23/128—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with hydrojets

Definitions

  • This invention relates to a concrete working machine for working a concrete surface, comprising a carrier with a transverse feed beam that carries a carriage with a water jet nozzle, a first hydraulic motor for moving the carriage along the feed beam, a second hydraulic motor for pivoting the nozzle about a first axis so as to give it an attack angle to the concrete in both directions when the carriage are reciprocated in working sweeps, and a third hydraulic motor for pivoting the nozzle about a second axis for oscillating it in a plane transverse to the feed beam.
  • Road salting has a detrimental influence on concrete road beds, and the surface layer of road beds of concrete bridges must be replaced after some years before the salt has penetrated down to the steel reinforcement; otherwise will the maintenance costs be very high. Therefore, one wants to remove the upper eroded concrete layer to free the uppermost reinforcement layer and to cast a new concrete surface layer before the uppermost reinforcement layer has been affected by the salt.
  • Machines for such concrete removal are known for example by SE-451742-B , US-5361993-A , WO 0231265 , and SE-508821-C .
  • the working unit of such machines that is, the feed beam with its carriage, is in a difficult environment because of the splatter of rock, concrete and water, and sensors and electric lines for control are particularly at risk.
  • Figure 1 shows a concrete working machine that comprises a mobile unit; a vehicle 11 on wheels that carries a foldable arm 13,14.
  • Built-in hydraulic motors 12 in the wheels are arranged to move the vehicle.
  • the vehicle has a power unit that comprises a motor that drives a hydraulic pump. Water is stored in a separate container which has a high-pressure water pump.
  • the foldable arm has an inner arm 13, which is mounted on the vehicle to be turnable about an axis parallel with the longitudinal axis of the vehicle, and an outer arm 14, which is mounted on the outer end of the inner arm about an axis that is also parallel with the longitudinal axis of the vehicle.
  • the inner arm consists of two parts, longitudinally displaceable relative to each other so that the inner arm is extensible:
  • the outer end of the outer arm carries a transverse feed beam 15 that is also turnable about an axis parallel with the longitudinal axis of the vehicle.
  • the feed beam can thus be displaced laterally and it can also be used for vertical surfaces.
  • a carriage 20 is mounted on the feed beam to be movable along it.
  • the feed beam and the carriage is the working unit of the machine.
  • the carriage is shown separately as figure 2 and it is movable as indicated with the arrows 19 in figure 2 .
  • the carriage 20 has a hydraulic motor 21 that has a drive gear in engagement with a gear rack on the feed beam for driving the carriage along the feed beam.
  • the carriage carries a tube 22 that has a nozzle 23 at its end and it is coupled to the pump for high pressure water so that the nozzle will eject a laminar water jet at supersonic speed that can work concrete.
  • the tube 22 with its nozzle 23 can be regarded as the nozzle.
  • a hydraulic motor 24 is built together with a bearing housing 25 for a crank shaft so that the motor via the crank shaft will oscillate the tube 22 about an axis II in a plane transverse to direction of movement of the carriage.
  • a hydraulic motor in the form of a hydraulic cylinder 26 is coupled to swing the tube 22 together with the motor 24 and the bearing housing 25 about an axis I that is transverse to the direction of movement of the carriage, that is, to pivot the tube in a plane parallel with the with the feed beam.
  • the tube with its nozzle projects into a slot in a shield 28 that keeps within it the splashing water and the concrete particles broken away from the concrete surface.
  • Figure 3 shows schematically the carriage 20 and the tube 22 during a working operation for removing the surface layer of concrete 29, for example the surface layer of a reinforced concrete roadbed of a bridge, where the water jet breaks away the deteriorated surface layer that is to be renewed.
  • the reinforcement has been denoted 30.
  • the tube 22 is shown during the movement of the carriage 20 to the right in the figure with the tube having an attack angle to the concrete surface.
  • FIG. 4 illustrates an electronic control unit 40, controlled from the operator's console 39, and a wire diagram for controlling the hydraulic motors 12,21,24,26 mentioned above.
  • Each hydraulic motor is coupled to its electrically controlled distribution valve 41-44 by hydraulic conduits (hoses) 45,46; 47,48; 49,50; 51,52.
  • the supply and drain conduits of the distribution valves are not illustrated.
  • One of the hydraulic conduits of each motor has a flow meter in the form of a pulse transducer 55-58 coupled to the control unit.
  • Each pulse transducer meters the flow through it and gives for every pre-determined volume unit that passes an electric pulse to the respective control unit via the respective electric line 60-63.
  • the pre-determined volume units can for example be in the order of 0.2 cm 3 which will provide sufficient accuracy.
  • the entire system with control unit, distribution valves, and pulse transducers can be placed well protected in the vehicle 11, that is, well protected at a distance from the feed beam 15, and only the hydraulic conduits 47-52 of the hydraulic motors lead from the vehicle via the foldable arm 13,14 to the hydraulic motors 21,24,26 on the carriage 20.
  • at least one of the hydraulic motors 21,24,26 or preferably all three of them can be controlled in this way and their meters (pulse transmitters) will not be in the hazardous environment on the feed beam.
  • the hydraulic motors 12 (only one of them is illustrated in the diagram) for the advancement of the vehicle can suitably be controlled in the same way as illustrated.
  • the working unit that is, the feed beam 15 and the carriage 20
  • the foldable and extensible arm 13,14 that is mounted on the vehicle 11.
  • the arm and the vehicle is thus a carrier for the working unit.
  • the carrying unit of the vehicle, that is, the arm 13,14 can alternatively be separated from the vehicle/power unit 11 and be a separately carried long arm in order to make possible the working of other surfaces than a roadbed, for example the foundation of a bridge and also the parts of the foundation that are under water.
  • the stepping between the working sweeps can then be carried out by the foldable and extensible arm.
  • the operation of the working unit 15,20 is extremely reliable since it has no active electric sensors or meters nor any electric lines, and it can therefore be used under water. Reference sensors can be used for control and calibration, but any malfunction of them or their electric lines does not disturb the working operation and does not reduce the reliability.
  • the carrying unit for the working unit can alternatively be a stiff guide or two guiding wire ropes that extend down along a foundation in the water while the vehicle 11 is on the roadbed and coupled to the working unit 15,20 only by long hydraulic hoses.
  • the stepping between the working sweeps will then be carried out by a stepping motor on the feed beam that moves the feed beam along the guide or guiding wire ropes.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Holo Graphy (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Noodles (AREA)
  • Centrifugal Separators (AREA)

Abstract

The machine has control unit (40) for distribution valves (41-44) in hydraulic lines (46,49,50,52) of the hydraulic motors (12,21,24,26), which is coupled to flow meters (55-58) in the hydraulic lines (45,47,49,51) of the hydraulic motors.

Description

    Technichal field
  • This invention relates to a concrete working machine for working a concrete surface, comprising a carrier with a transverse feed beam that carries a carriage with a water jet nozzle, a first hydraulic motor for moving the carriage along the feed beam, a second hydraulic motor for pivoting the nozzle about a first axis so as to give it an attack angle to the concrete in both directions when the carriage are reciprocated in working sweeps, and a third hydraulic motor for pivoting the nozzle about a second axis for oscillating it in a plane transverse to the feed beam.
    • Background of the invention
  • Road salting has a detrimental influence on concrete road beds, and the surface layer of road beds of concrete bridges must be replaced after some years before the salt has penetrated down to the steel reinforcement; otherwise will the maintenance costs be very high. Therefore, one wants to remove the upper eroded concrete layer to free the uppermost reinforcement layer and to cast a new concrete surface layer before the uppermost reinforcement layer has been affected by the salt. Machines for such concrete removal are known for example by SE-451742-B , US-5361993-A , WO 0231265 , and SE-508821-C . The working unit of such machines, that is, the feed beam with its carriage, is in a difficult environment because of the splatter of rock, concrete and water, and sensors and electric lines for control are particularly at risk.
    • Object of invention and brief description of the drawings
  • It is an object of the invention to improve the reliability and the availability of a concrete working machine of this kind.
    • Brief description of the drawings
    • Figure 1 is a perspective view of a concrete working machine that is shown as an example of the invention.
    • Figure 2 is a perspective view of a portion of the machine shown in figure 1.
    • Figure 3 is a schematic view of the portion shown in figure 2 in operation.
    • Figure 4 is a diagram of the control system for the machine shown in figures 1-3.
    Description of the illustrated example of the invention.
  • Figure 1 shows a concrete working machine that comprises a mobile unit; a vehicle 11 on wheels that carries a foldable arm 13,14. Built-in hydraulic motors 12 in the wheels are arranged to move the vehicle. The vehicle has a power unit that comprises a motor that drives a hydraulic pump. Water is stored in a separate container which has a high-pressure water pump. The foldable arm has an inner arm 13, which is mounted on the vehicle to be turnable about an axis parallel with the longitudinal axis of the vehicle, and an outer arm 14, which is mounted on the outer end of the inner arm about an axis that is also parallel with the longitudinal axis of the vehicle. The inner arm consists of two parts, longitudinally displaceable relative to each other so that the inner arm is extensible: The outer end of the outer arm carries a transverse feed beam 15 that is also turnable about an axis parallel with the longitudinal axis of the vehicle. The feed beam can thus be displaced laterally and it can also be used for vertical surfaces. A carriage 20 is mounted on the feed beam to be movable along it. The feed beam and the carriage is the working unit of the machine. The carriage is shown separately as figure 2 and it is movable as indicated with the arrows 19 in figure 2. The carriage 20 has a hydraulic motor 21 that has a drive gear in engagement with a gear rack on the feed beam for driving the carriage along the feed beam. The carriage carries a tube 22 that has a nozzle 23 at its end and it is coupled to the pump for high pressure water so that the nozzle will eject a laminar water jet at supersonic speed that can work concrete. The tube 22 with its nozzle 23 can be regarded as the nozzle. A hydraulic motor 24 is built together with a bearing housing 25 for a crank shaft so that the motor via the crank shaft will oscillate the tube 22 about an axis II in a plane transverse to direction of movement of the carriage. A hydraulic motor in the form of a hydraulic cylinder 26 is coupled to swing the tube 22 together with the motor 24 and the bearing housing 25 about an axis I that is transverse to the direction of movement of the carriage, that is, to pivot the tube in a plane parallel with the with the feed beam. The tube with its nozzle projects into a slot in a shield 28 that keeps within it the splashing water and the concrete particles broken away from the concrete surface.
  • Figure 3 shows schematically the carriage 20 and the tube 22 during a working operation for removing the surface layer of concrete 29, for example the surface layer of a reinforced concrete roadbed of a bridge, where the water jet breaks away the deteriorated surface layer that is to be renewed. The reinforcement has been denoted 30. The tube 22 is shown during the movement of the carriage 20 to the right in the figure with the tube having an attack angle to the concrete surface.
  • When the working has reached the right end line, the hydraulic cylinder 26, figure 2, swings the tube 22 into a corresponding attack angle for a working sweep to the left in the figure. In this turning point the entire vehicle is stepped forwards some centimetres by means of the motors 12 in figure 1. The operation sequence is suitable the one described in WO-0231265 and it is not described in detail but reference is made to the publication. The entire operation sequence is computer controlled and the various parameters such as attack angle, the velocity and end positions of the carnage, the step length, etc. are controlled from the operator's consol 39 in figure 1.
  • Figure 4 illustrates an electronic control unit 40, controlled from the operator's console 39, and a wire diagram for controlling the hydraulic motors 12,21,24,26 mentioned above. Each hydraulic motor is coupled to its electrically controlled distribution valve 41-44 by hydraulic conduits (hoses) 45,46; 47,48; 49,50; 51,52. The supply and drain conduits of the distribution valves are not illustrated. One of the hydraulic conduits of each motor has a flow meter in the form of a pulse transducer 55-58 coupled to the control unit. Each pulse transducer meters the flow through it and gives for every pre-determined volume unit that passes an electric pulse to the respective control unit via the respective electric line 60-63. The pre-determined volume units can for example be in the order of 0.2 cm3 which will provide sufficient accuracy. The entire system with control unit, distribution valves, and pulse transducers can be placed well protected in the vehicle 11, that is, well protected at a distance from the feed beam 15, and only the hydraulic conduits 47-52 of the hydraulic motors lead from the vehicle via the foldable arm 13,14 to the hydraulic motors 21,24,26 on the carriage 20. In accordance with the invention, at least one of the hydraulic motors 21,24,26 or preferably all three of them can be controlled in this way and their meters (pulse transmitters) will not be in the hazardous environment on the feed beam. The hydraulic motors 12 ( only one of them is illustrated in the diagram) for the advancement of the vehicle can suitably be controlled in the same way as illustrated.
  • In the illustrated example of the invention, the working unit, that is, the feed beam 15 and the carriage 20, is carried by the foldable and extensible arm 13,14 that is mounted on the vehicle 11. The arm and the vehicle is thus a carrier for the working unit. The carrying unit of the vehicle, that is, the arm 13,14, can alternatively be separated from the vehicle/power unit 11 and be a separately carried long arm in order to make possible the working of other surfaces than a roadbed, for example the foundation of a bridge and also the parts of the foundation that are under water. The stepping between the working sweeps can then be carried out by the foldable and extensible arm. The operation of the working unit 15,20 is extremely reliable since it has no active electric sensors or meters nor any electric lines, and it can therefore be used under water. Reference sensors can be used for control and calibration, but any malfunction of them or their electric lines does not disturb the working operation and does not reduce the reliability.
  • The carrying unit for the working unit can alternatively be a stiff guide or two guiding wire ropes that extend down along a foundation in the water while the vehicle 11 is on the roadbed and coupled to the working unit 15,20 only by long hydraulic hoses. The stepping between the working sweeps will then be carried out by a stepping motor on the feed beam that moves the feed beam along the guide or guiding wire ropes.

Claims (3)

  1. A concrete working machine for working a concrete surface, comprising: a carrier (11,13,14), with a transverse feed beam (15) that carries a carriage (20) with a water jet nozzle (22,23), a first hydraulic motor (21) for moving the carriage along the feed beam, a second hydraulic motor (26) for pivoting the nozzle about a first axis (I) so as to give it an attack angle to the concrete in both directions when the carriage is reciprocated in working sweeps, and a third hydraulic motor (24) for pivoting the nozzle about a second axis (II) for oscillating it in a plane transverse to the feed beam,
    characterised by
    flow meters (56-58) in the hydraulic lines (47-52) of at least some of the hydraulic motors (21,24,26), coupled to an electronic control unit (40) for distribution valves (42-44) in the hydraulic conduits, the flow meters being positioned at a distance from the feed beam (15).
  2. A concrete working machine according to claim 1, characterised in that the flow meters are pulse transducers (56-58).
  3. A concrete working machine according to claim 1 or 2, characterised in that the carrier (11,13,14) comprises a mobile unit (11) with an arm (13,14) on the end of which the feed beam (15) is mounted, and a hydraulic motor(12) for stepping the mobile unit is also controlled by a flow meter (55) in one of the hydraulic lines (45) of the motor (12).
EP05722216A 2004-03-24 2005-03-16 A concrete working machine Not-in-force EP1730353B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0400753A SE0400753L (en) 2004-03-24 2004-03-24 Concrete felling machine
PCT/SE2005/000370 WO2005090684A1 (en) 2004-03-24 2005-03-16 A concrete working machine

Publications (2)

Publication Number Publication Date
EP1730353A1 EP1730353A1 (en) 2006-12-13
EP1730353B1 true EP1730353B1 (en) 2010-06-09

Family

ID=32067505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05722216A Not-in-force EP1730353B1 (en) 2004-03-24 2005-03-16 A concrete working machine

Country Status (5)

Country Link
EP (1) EP1730353B1 (en)
AT (1) ATE470758T1 (en)
DE (1) DE602005021762D1 (en)
SE (1) SE0400753L (en)
WO (1) WO2005090684A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE530049C2 (en) 2006-06-22 2008-02-19 Aquajet Systems Holding Ab Apparatus and method for moving a beam member
SE1300085A1 (en) 2013-02-05 2014-04-15 Conjet Ab A unit for harvesting a surface with a high-pressure water jet
SE541458C2 (en) 2016-02-29 2019-10-08 Conjet Ab Water spray unit and way of felling a surface
CN109915016B (en) * 2019-04-03 2024-03-08 中国铁建重工集团股份有限公司 Drill jumbo and drill jumbo control method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2027776A (en) * 1979-08-09 1980-02-27 Gutehoffnungshuette Sterkrade Cutting a Solid Body
US4854770A (en) * 1984-04-16 1989-08-08 Indescor Hydrodynamics Inc. Method and apparatus for removal of surface material
US4683684A (en) * 1985-10-22 1987-08-04 Electric Power Research Institute, Inc. High pressure fluid jet apparatus for cutting and removing pavement
SE466899B (en) * 1990-08-24 1992-04-27 Aquajet Systems Ab DEVICE FOR MATERIAL REMOVAL PROCESSING OF A MATERIAL LAYER, SPECIFICALLY A CONCRETE LAYER
SE520866C2 (en) * 2000-10-13 2003-09-09 Conjet Ab Ways to operate a concrete machining machine
SE521403C2 (en) * 2001-04-09 2003-10-28 Conjet Ab Concrete logging machine and ways to expose reinforcement in a concrete surface

Also Published As

Publication number Publication date
DE602005021762D1 (en) 2010-07-22
EP1730353A1 (en) 2006-12-13
ATE470758T1 (en) 2010-06-15
WO2005090684A1 (en) 2005-09-29
SE525915C2 (en) 2005-05-24
SE0400753L (en) 2005-05-24
SE0400753D0 (en) 2004-03-24

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