EP0364823B1 - Dispositif pour distribuer pneumatiquement du béton débité hydromécaniquement dans une coulée épaisse - Google Patents

Dispositif pour distribuer pneumatiquement du béton débité hydromécaniquement dans une coulée épaisse Download PDF

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Publication number
EP0364823B1
EP0364823B1 EP19890118477 EP89118477A EP0364823B1 EP 0364823 B1 EP0364823 B1 EP 0364823B1 EP 19890118477 EP19890118477 EP 19890118477 EP 89118477 A EP89118477 A EP 89118477A EP 0364823 B1 EP0364823 B1 EP 0364823B1
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EP
European Patent Office
Prior art keywords
drive
piston
concrete
additive
metering device
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
EP19890118477
Other languages
German (de)
English (en)
Other versions
EP0364823A1 (fr
Inventor
Joachim Dipl.-Ing. Coja
Karl-Ernst Dipl.-Ing. Von Eckardstein
Andrej Dipl.-Ing. Simnovec
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.)
Friedrich Wilhelm Schwing GmbH
Original Assignee
Friedrich Wilhelm Schwing GmbH
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
Priority claimed from DE3927332A external-priority patent/DE3927332C2/de
Application filed by Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Priority to AT89118477T priority Critical patent/ATE78900T1/de
Publication of EP0364823A1 publication Critical patent/EP0364823A1/fr
Application granted granted Critical
Publication of EP0364823B1 publication Critical patent/EP0364823B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
    • B28C7/162—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure
    • B28C7/163—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure using a pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1176—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor
    • F04B9/1178—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor the movement in the other direction being obtained by a hydraulic connection between the liquid motor cylinders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2514—Self-proportioning flow systems
    • Y10T137/2516—Interconnected flow displacement elements

Definitions

  • the invention relates to a device for the pneumatic application of concrete promoted hydromechanically in the dense stream according to the preamble of patent claim 1.
  • the spraying of ready-mixed concrete thus made possible guarantees constant strength of the building material while maintaining a predetermined water-cement value with low energy consumption for the conveying air and the hydromechanical conveying.
  • the rebound losses are extremely low.
  • the dense phase flow enables large quantities of concrete to be spread, e.g. in tunnel and tunnel construction, in securing excavation embankments or similar Buildings are needed.
  • concrete pumps for spraying ready-mixed concrete allows the use of proven constructions that are low in wear and require little maintenance.
  • the flow rate can be between 4 cbm / h and 19 cbm / h.
  • Concrete pumps of this type are able to supply concrete with a rigid consistency hydromechanically to the spraying device, which is the prerequisite for high strength of the shotcrete.
  • the solidification accelerator must be added in a predetermined amount to the amount of concrete being conveyed and is usually liquid; for example, it is water glass. As a result of the pneumatic delivery of the solidification accelerator, it can be added to the dense stream of the concrete in atomized form. This makes it possible to help the smallest amounts of the solidification accelerator in the concrete to work.
  • the solidification accelerator can be atomized into the conveying air by means of atomizing nozzles before the conveying air is added in the dense stream of the concrete.
  • Such control is preferable to manual control of the amount of additive because it is automatic, i.e. works without the intervention of a human worker who must guide the mouthpiece from which the concrete emerges in the form of a broken spray. Because here one is dependent on the observation of the setting behavior of the poured concrete, as well as on the sense of proportion and the reaction speed of the worker concerned.
  • the invention is therefore based on a previously known device with automatic control of the solidification accelerator quantities which are added to the dense stream at every moment of the concrete delivery.
  • the default is adjustable.
  • the solidification accelerator is supported by a gear pump, which receives its kinetic energy from a drive which is switched on directly behind the pressure generator in the pressure medium line of the concrete pump and consists of a hydraulic motor. This hydraulic motor acts on the gear pump via a control gear.
  • a valve is installed in the delivery line leading the solidification accelerator, which is controlled on the one hand by hydraulic End position impulses of the drive pistons in the working cylinders of the concrete pump and, on the other hand, are actuated by a hydraulic working cylinder, which serves as a drive for the building material pusher, which reverses the delivery cylinders. This valve opens the way to the pumped solidification accelerator back into the storage tank and thus prevents the accelerator from being injected into the mouthpiece in the phases of the concrete pump that are free of building materials.
  • the previously known device does not work properly. This is mainly due to the components of the dosing device described.
  • the control gear described is often handled improperly, especially when it is operated at a standstill and reacts to it with faults and damage. Due to the design, high leakages occur in the lower speed range on the gear pump, which conveys the solidification accelerator, so that the proportionality of the quantities is no longer guaranteed.
  • the arrangement of the hydraulic gear pump drive makes the valve described necessary because pressure medium is also conveyed in the phases in which no building material is conveyed.
  • the object of the invention is to ensure reliable metering of the solidification accelerator in a device of the general configuration described at the beginning.
  • the invention arranges the drive of the metering devices at a point in the hydraulic working circuit of the concrete pump at which the hydraulic working medium is displaced by the latter when the drive piston moves. This ensures that the drive of the metering device only releases kinetic energy when the pump cylinder is working, that is, when building material is actually being conveyed. Since the swallowing quantities of the reciprocating piston drive of the metering device are added to the amount of medium flowing in the displacement circuit, the synchronous function of the working pistons of the concrete pump remains unchanged, but the deflection of the drive of the metering device corresponds in each phase to the promotion of the position of the drive pistons. Therefore, in spite of the simplification associated with the reciprocating piston drive of the metering device, no complicated control gear is required.
  • the invention makes use of the possibilities opened by a linear piston drive that can be provided for the metering device.
  • This is a drive cylinder for the linearly movable piston, which works on a piston rod led out of both cylinder covers.
  • the amount of swallowing is the same in both directions of piston movement and can therefore absorb the same amount of swallowing regardless of the direction of piston movement.
  • Such a linear piston drive can also be used in a simple manner to replace the gear pump by a more appropriate metering device. This is reflected in claim 3.
  • the drive of the metering device and its pump are the same system, so that there is a simple connection of both devices.
  • the features of claim 4 allow a mechanical transmission to be used between the devices of the same system, with which the amounts of admixture that result for the respective concrete can be fixed. This is done via a crank arm, to which one of the two system-like devices is connected with an adjustable slide.
  • the concrete pump (1) shown in FIG. 1 only with its essential parts conveys concrete (2) into a nozzle pipe (3) through a dense stream Hose connection (4) too.
  • the nozzle pipe (3) penetrates a pipe cover and ends at a spray nozzle (5).
  • Compressed air is supplied in the direction of arrow (6), which entrains the atomized additive.
  • the additive reaches the nozzle through a nipple (7) from a line (8).
  • the additive atomized by the nozzle is suspended in the conveying air when it encounters the dense stream of concrete (2) at (9), which is thereby broken up and under pressure from the nozzle (10) of the pipe (3) in a broken jet ( 11) emerges.
  • the concrete pump (1) conveys the concrete with two delivery cylinders (12, 14) with the aid of pistons (15, 16), which alternately suck in the concrete (piston 15) and press it out through a swivel tube (17) (piston 16).
  • the swivel tube connects the two cylinders (12, 14) to the delivery line and is reversed in the respective end position of the pistons. This is done hydraulically with pistons (18, 19) in working cylinders (20, 21) which are acted upon by lines (22, 23) with hydraulic pressure medium.
  • the control sits in a block (24).
  • the two lines (29, 30) act on the full piston side, which are switched with the controller (24).
  • the synchronism of the pistons (27 and 28) is ensured by a displacement circuit (31) which is connected to the working cylinders (25, 26) on the piston rod side.
  • the displacement circuit thus contains the hydraulic working medium displaced from the respective cylinder (25, 26) by a leading drive piston (27, 28) and feeds it to the adjacent piston.
  • the two lines (32, 33) come out of the displacement circuit (31) and act on the cylinder spaces (35, 36), which are separated from one another by a linear piston (34), with hydraulic pressure medium which is added to the displaced amount.
  • the piston rod (37) connected to the displacer piston (34) ensures cylinder spaces (35, 36) of the same volume, so that the reciprocating movement of the displacer piston in the direction of the arrow (13) is ensured in both directions.
  • the piston rod (37) is connected with an adjustable slide (38) to a crank arm (39), the linkage (40) of which is fixed to the frame is shown at (41).
  • the swing-fixed linkage (42) of a piston rod (43) of a further linear piston (44) is located between the slide (38) and the linkage (40). This serves to promote liquid solidification accelerator (45) from a tank (46).
  • the feed cylinder (47) is acted upon on both sides by line branches which are provided with check valves. They correspond to branches with check valves of the delivery line (48), which leads to a directional valve (49).
  • the directional control valve is loaded on one side with a return spring (50) and is acted upon on the other side via a line (51) which reflects the respective pressure in the piston chambers (52, 53) of the working cylinders (25, 26).
  • Check valves (54, 55) in the branches of the line (51) ensure that the transfer of hydraulic working fluid from one to the other of the cylinder spaces (52, 53) is avoided.
  • the hydraulic pressure generator (73) for the hydraulic working medium (75) of the concrete pump (1) kept ready in a tank (74) is connected upstream of the control (24), which also influences a return line (76).
  • the setting of the slide (38) specifies the deflection of the crank arm (39) and thereby determines the amount of solidification accelerator displaced from the cylinder (47) by the linear piston (44). By adjusting the slide (38) with the aid of a spindle (59) this amount can be changed and thus adjusted to the respective concrete delivery rate.
  • a piston rod (60, 61) is articulated at (42) on the rocker (39). These piston rods are moved in opposite directions as soon as the rocker (39) is driven according to the arrow.
  • the metering pistons (62, 63) connected to the piston rods (60 and 61) run in single-acting metering cylinders (64, 65), analogous to the conditions of the arrangement of the linear piston (44) (see above), the solidification accelerator via valves secured with non-return valves Remove the suction lines (66, 67) from the tank (46) and feed the solidification accelerator to the line (8) via the directional control valve (49) via branches secured with non-illustrated check valves.
  • the piston rod sides of the cylinders (64, 65), on the other hand, are supplied with water from a storage tank (68) via line branches (69 and 70), which are secured with check valves.
  • line branches of a waste water line (71) are acted on, in which check valves ensure that no waste water can be drawn in. In this way, caking of the setting accelerator, which tends to this, is prevented.
  • a shut-off valve (72) is installed, which enables the displacement piston (34) to be driven via the branches (32, 33) in the closed, blocked state, and which in the open state Branches (32, 33) short-circuits and a pressure to drive the displacer (34) cannot build up, which means that the additive is not conveyed out of the tank (46).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Reciprocating Pumps (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Claims (6)

1. Dispositif d'éjection pneumatique d'un béton amené en coulée épaisse par un système hydromécanique au moyen d'une pompe à béton actionnée hydrauliquement par un système moteur comportant au moins deux vérins (12, 14) pourvus de pistons (15, 16) à mouvements opposés, le fonctionnement de cette pompe étant régularisé par un circuit de refoulement qui reçoit le liquide hydraulique refoulé par un piston, cette pompe étant pourvue d'un système de dosage de débit d'un additif servant d'accélérateur de durcissement, le moteur de ce système étant raccordé au circuit hydraulique du système moteur de la pompe à béton, caractérisé en ce que le moteur (34-37) du système de dosage (43-47 ; 60-70) est relié au circuit de refoulement (31) et constitué par un vérin dont le piston (34) est animé d'un mouvement de va-et-vient, et dont le débit correspond au débit de refoulement des pistons (27, 28) du système moteur et s'ajoute dans les deux sens au débit de refoulement de chacun des pistons moteurs (27, 28).
2. Dispositif selon la revendication 1, caractérisé en ce que le moteur du système de dosage est constitué par le piston d'un vérin (34-37).
3. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce qu'une pompe à piston (43-47) sert de système de dosage.
4. Dispositif selon l'une au moins des revendications 1 à 3, caractérisé en ce que le vérin moteur (34-37) du système de dosage et celui de la pompe à piston (43-47) de ce système sont articulés sur une bielle oscillante (39), l'une de ces articulations étant réalisée sur un coulisseau (38) de position réglable, qui sert à régler le débit de l'additif.
5. Dispositif selon la revendication 1 et l'une au moins des revendications suivantes 2 à 4, caractérisé en ce qu'une soupape à plusieurs voies (49) est montée sur la canalisation de débit (48) pour envoyer sélectivement le débit de l'additif dans le réservoir d'additif ou dans la canalisation de débit de l'additif (48), cette soupape étant actionnée par la pression du liquide qui règne dans le volume (52, 53) balayé par les pistons des vérins moteurs (25, 26).
6. Dispositif selon la revendication 1 et l'une au moins des revendications suivantes 2 à 5, caractérisé en ce que le système de dosage est constitué par une pompe à pistons comportant deux corps cylindriques à simple effet (64,65) en montage différentiel, dont les volumes cylindriques internes où ne passe pas l'additif sont reliés par des canalisations d'aspiration (69,70) à un réservoir d'eau douce (6), dans lequel la pompe aspire de l'eau douce pour laver des parois des cylindres (64,65) en refoulant ensuite cette eau dans une canalisation d'évacuation (71).
EP19890118477 1988-10-18 1989-10-05 Dispositif pour distribuer pneumatiquement du béton débité hydromécaniquement dans une coulée épaisse Expired - Lifetime EP0364823B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89118477T ATE78900T1 (de) 1988-10-18 1989-10-05 Vorrichtung zum pneumatischen ausbringen von hydromechanisch im dichtstrom gefoerdertem beton.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3835373 1988-10-18
DE3835373 1988-10-18
DE3927332A DE3927332C2 (de) 1988-10-18 1989-08-18 Vorrichtung zum pneumatischen Ausbringen von hydromechanisch im Dichtstrom gefördertem Beton
DE3927332 1989-08-18

Publications (2)

Publication Number Publication Date
EP0364823A1 EP0364823A1 (fr) 1990-04-25
EP0364823B1 true EP0364823B1 (fr) 1992-07-29

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Application Number Title Priority Date Filing Date
EP19890118477 Expired - Lifetime EP0364823B1 (fr) 1988-10-18 1989-10-05 Dispositif pour distribuer pneumatiquement du béton débité hydromécaniquement dans une coulée épaisse

Country Status (7)

Country Link
US (1) US5066203A (fr)
EP (1) EP0364823B1 (fr)
JP (1) JP2852541B2 (fr)
BR (1) BR8905270A (fr)
CA (1) CA2000952A1 (fr)
ES (1) ES2034550T3 (fr)
GR (1) GR3005875T3 (fr)

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DE3910120A1 (de) * 1989-03-29 1990-10-04 Putzmeister Maschf Steuerungsanordnung fuer eine zweizylinder-dickstoffpumpe
DE4205144A1 (de) * 1992-02-20 1993-08-26 Schwing Gmbh F Vorrichtung zum pneumatischen ausbringen von hydromechanisch im dichtstrom gefoerdertem beton
GB2280715B (en) * 1993-08-03 1996-05-01 Willett Thomas & Co Ltd Liquid additive metering
US5513671A (en) * 1994-07-13 1996-05-07 Schwing America, Inc. Hydraulically controlled water spool valve
FR2731919A1 (fr) * 1995-03-23 1996-09-27 Mancel Patrick Dispositif d'alimentation d'un moyen de distribution en une composition a deux composants dont on peut faire varier les proportions respectives
IT1282148B1 (it) * 1996-04-30 1998-03-12 Cifa Spa Impianto per la erogazione di calcestruzzo additivat0, a flusso costante
DE102004015416A1 (de) * 2004-03-26 2005-10-13 Putzmeister Ag Vorrichtung und Verfahren zur Steuerung einer Dickstoffpumpe
CN100337031C (zh) * 2005-10-13 2007-09-12 南京全章液力科技有限公司 液力往复泵
WO2007111689A2 (fr) * 2005-11-08 2007-10-04 Good Earth Tools, Inc. Bagues d'etancheite pour pompes a boue abrasive
DE102008019993A1 (de) * 2007-04-20 2008-11-06 Hermann Edelmann Leichtfahrzeug
CN101139866B (zh) * 2007-08-10 2010-06-30 李德安 链式混凝土喷射机
US20090220358A1 (en) * 2008-02-29 2009-09-03 Putzmeister America, Inc. Unequal length alternating hydraulic cylinder drive system for continuous material output flow with equal material output pressure
IT1397794B1 (it) * 2010-01-26 2013-01-24 Cifa Spa Dispositivo per il controllo attivo delle vibrazioni di un braccio articolato per il pompaggio di calcestruzzo.
CN103982389B (zh) * 2014-06-04 2016-03-30 镇江长城注浆设备有限公司 多液高精度无级配比同步注浆泵
US9850671B2 (en) * 2014-11-24 2017-12-26 Cifa Spa Vehicle to project concrete
CN106870317B (zh) * 2017-04-18 2019-04-05 黄山市汇润机械有限公司 一种液压驱动双作用泥浆泵
CN111910639A (zh) * 2020-08-25 2020-11-10 杭州紫腾材科技有限公司 一种建筑基坑浇筑用混凝土输送装置

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US2289332A (en) * 1937-05-05 1942-07-14 Wallace & Tiernan Co Inc Liquid feeding apparatus
US3527213A (en) * 1966-07-21 1970-09-08 Drager Otto H Supply gas driven narcosis mixing apparatus
US3733965A (en) * 1971-06-07 1973-05-22 Case Co J I Control system for fluid cylinder
SE360136B (fr) * 1972-02-03 1973-09-17 Stabilator Ab
US4105373A (en) * 1974-11-12 1978-08-08 Fogt Industriemaschinenvertretung A.G. Fluid distributor device for controlling an apparatus for pumping wet concrete and the like
JPS593368B2 (ja) * 1978-10-02 1984-01-24 極東開発工業株式会社 粉粒体の定重、定容量供給装置
US4529000A (en) * 1982-12-28 1985-07-16 Davey Tree Expert Company Flow volume proportioning system
FR2594053B1 (fr) * 1986-02-13 1991-11-29 Hochtief Ag Hoch Tiefbauten Procede et unite de projection pour l'application d'une couche de beton projete
DE3703761A1 (de) * 1987-02-07 1988-08-25 Hochtief Ag Hoch Tiefbauten Vorrichtung zum auftragen einer spritzbetonschicht

Also Published As

Publication number Publication date
JP2852541B2 (ja) 1999-02-03
ES2034550T3 (es) 1993-04-01
GR3005875T3 (fr) 1993-06-07
BR8905270A (pt) 1990-05-22
CA2000952A1 (fr) 1990-04-18
JPH02225768A (ja) 1990-09-07
US5066203A (en) 1991-11-19
EP0364823A1 (fr) 1990-04-25

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