EP0206224B1 - Vorrichtung zum pneumatischen Ausbringen eines hydromechanisch in Dichtstrom geförderten, erhärtenden Baustoffes, insbesondere eines hydraulischen Spritz-betons oder -mörtels - Google Patents

Vorrichtung zum pneumatischen Ausbringen eines hydromechanisch in Dichtstrom geförderten, erhärtenden Baustoffes, insbesondere eines hydraulischen Spritz-betons oder -mörtels Download PDF

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Publication number
EP0206224B1
EP0206224B1 EP86108249A EP86108249A EP0206224B1 EP 0206224 B1 EP0206224 B1 EP 0206224B1 EP 86108249 A EP86108249 A EP 86108249A EP 86108249 A EP86108249 A EP 86108249A EP 0206224 B1 EP0206224 B1 EP 0206224B1
Authority
EP
European Patent Office
Prior art keywords
building material
accelerator
pipe
compressed air
mouthpiece
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
EP86108249A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0206224A3 (en
EP0206224A2 (de
Inventor
Karl-Ernst Von Eckardstein
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
Application filed by Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Priority to AT86108249T priority Critical patent/ATE49264T1/de
Publication of EP0206224A2 publication Critical patent/EP0206224A2/de
Publication of EP0206224A3 publication Critical patent/EP0206224A3/de
Application granted granted Critical
Publication of EP0206224B1 publication Critical patent/EP0206224B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/02—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing
    • B28C5/026—Mixing guns or nozzles; Injector mixers
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G2021/049—Devices for both conveying and distributing concrete mixing nozzles specially adapted for conveying devices

Definitions

  • the invention relates to a device for the pneumatic application of a hardening building material, in particular a hydraulic shotcrete or mortar, which is promoted hydromechanically in a dense flow.
  • the hardening building materials applied with the device according to the invention serve for cladding or for forming parts of a building. Therefore, the invention is applicable not only to shotcrete or mortar also to other hydromechanically promoted building materials with different compositions. These include a. the sprayable plasters. Hydraulic building materials are also underground, i. H. used in mining and tunnel construction These are often granular to powdery substances with different water-solid factors. When spraying, these substrates are often with additives u. a. made of plastic or fiber mixtures. The invention is u. a.
  • the device according to the invention also serves for sealing in fire and weather insulation and in walls for smoothing with the aim of reducing weather resistance, and generally for sheeting work.
  • liquid accelerators are added to the building material in order to stimulate it to harden and thereby ensure an optimal load-bearing capacity in the shortest possible time. a. keeps the convergence of the mountain strata low in underground operations.
  • the accelerators are often water glass, which depending on the dosage leads to a more or less rapid acceleration of hardening.
  • the hydromechanical conveyance of the wet building material in particular in the form of a mortar or concrete, has the advantage over a well-known dry conveying, in which the necessary mixing water and the accelerator are added to the building material at the end of the line, the advantage of a uniform composition of the applied layers according to a predetermined recipe, which avoids the fluctuations in strength in the applied layers as a result of uneven compositions of the building material and uncontrolled addition of water.
  • the building material is z. B. discharged with a pump delivery pipe or hose line and sprayed onto the surface to be coated, which is provided by directing the flexible delivery line section with an order or a backfill. This conducting is usually done by hand by a worker.
  • the building material is accelerated and brought into suspension with the aid of the compressed air that is often added via nozzles.
  • the accelerator must be added on the one hand so that the building material does not harden until the building material has been discharged and has reached the relevant building area. It is therefore favorable to add the accelerator to the building material as far as possible at the blow-out end of the device.
  • this easily leads to the accelerator not being mixed completely and not homogeneously with the building material, as a result of which the layers created on the surface in question by directing the flexible conveyor line section turn out to be inhomogeneous and therefore the early strength is not achieved everywhere. Care must also be taken to ensure that as little accelerator liquid as possible is carried along with the conveying air, because otherwise it leads to undesirable concentrations of pollutants in the atmosphere.
  • the resistance of the subsoil changes in the course of the build-up of the spray layer and is usually the lower, the more the order grows.
  • the early strength of the building material therefore plays a role in this context, as does the amount of building material that is discharged.
  • the invention is based on a previously known device of the type described in the introduction (DE 33 35 953 A1).
  • the end section directly adjoining the mouthpiece tube, with which the dense stream of the building material is introduced into the compressed air stream, serves the conveying hose line, which introduces the hydromechanically promoted dense flow of the building material, together with the mouthpiece as a flexible conductor line section.
  • the end of this conveyor tube opposite the load-bearing end of the delivery tube, which is designed as a nozzle, has, in addition to the mouth of the compressed air line, the mouth of the feed line of the accelerator.
  • the nozzle usually consists of a plastic tube that is attached to the delivery tube and tapers towards the free end.
  • the mouthpiece is heavy because of the numerous components described and because of the weight of the filled lines and can therefore only be picked up with considerable effort by the worker who thus directs the flow of building materials.
  • the worker In addition to this downward pulling load, the worker must also bear the reaction forces which result from the acceleration caused by the escaping conveying air flow and the building material at the mouthpiece and, on the other hand, a consequence of the high pressure, usually applied by a pump, in the conveying pipe. or - are hose line; the latter condition also has the adverse effect that the delivery hose line of the dense stream connected to the mouthpiece becomes completely stiff.
  • the consequence of the force exertion associated with the phenomena described is inadequate directing of the flow of building materials and thus an unsatisfactory quality of the layer sequence produced by spraying onto the relevant surfaces of the building.
  • there is a potential risk of accidents which must be set particularly high if the worker starts the flow of building materials from an unsafe or limited loadable stand area, e.g. B. must conduct standing on a stage or a mast cage.
  • Conducting takes place in a known manner with a flexible line section connected to the mouthpiece, for example a hose, which in itself is lighter than the deposited part, but still has a much lower weight, because in this section the sealing stream is already in the suspension of the building material in Conveyed air flow transferred and therefore the concentration of heavy building material parts is significantly lower than in the dichroic flow.
  • the worker only has to take up a greatly reduced weight and, apart from the reaction forces occurring at the blow-out opening and the small reaction forces occurring at the mouth of the line of the hardener, has no further reaction forces to bear.
  • the invention avoids the difficulties described at the outset in the incorrect choice of the location at which the hardener or accelerator is added, by providing that an accelerator lead be connected to the free end of the conductor tube section and a second accelerator lead to the mouthpiece.
  • the invention has the advantage that, by consistently using the favorable load conditions of a conducting hose which carries the building material suspended in the conveying air, the blowing jet is guided by all loads which are the result of the heavy components in the dichroic line and the weight of the mouthpiece, frees and also eliminates the hindrance to directing the blow-out of the building material flow through the rigid feed hose of the flow of the dichroic flow, so that, as a result, directing with the device according to the invention is considerably facilitated by a worker, in particular by hand, and thereby increases the quality of the sprayed layers applied and also occupational safety becomes. According to the invention, this takes place without mechanical aids, that is to say without the usual monitors.
  • water glass is used as hardener in the device according to the invention, it is supplied practically without pressure. If there are aqueous solutions from other accelerators, they are easily injected both at the end of the conducting tube and into the mouthpiece. This makes it possible on the one hand the To reduce the amount of accelerator added to the conducting hose, thereby further facilitating the directing of the stream of building material that is blowing out, but on the other hand to better distribute the accelerator in the building material and to control its hardening more precisely. This is a consequence of the division of the accelerator into two mass flows, one of which is already added to the deposited mouthpiece.
  • the invention is used by placing the mouthpiece with at least one subsequent section of the compressed air line and the pipe or hose delivery line as described and described in claim 2 and using the floor or sole of the structure for this purpose, as a rule, are omitted additional measures. If, however, the blowing of the stream of building material has to be carried out from the unsafe stand areas described at the outset, it may be advisable to make use of the features of claim 3. This is because the reaction forces and also the weight of components of a stage or mast are absorbed, which are able to withstand these loads, so that the basket or the stage surface itself, which is entered by the worker, need not be loaded and therefore with their limited resilience also does not determine the applicability of the device according to the invention.
  • the details of the invention will become apparent from the following description of an embodiment with reference to the drawing.
  • the drawing shows a device of the type according to the invention while omitting all the details not necessary for understanding the invention and in longitudinal section and in a partially broken-off representation.
  • the device serves for the pneumatic application of a building material, namely a shotcrete, which is brought in hydromechanically in a dense flow through a conveying line 2.
  • the last section of this delivery line 2 is formed by a hose 3, in which a connecting pipe 4 is integrated.
  • the connecting pipe 4 is connected to a pipe socket 6, which leads at an acute angle into a delivery pipe 7 of a mouthpiece, generally designated 8.
  • the rear end 9 of the delivery pipe 7 carries a nozzle insert 10, the nozzle 11 of which is aligned with the axis 12 of the delivery pipe 7.
  • the nozzle insert 10 forms the end of a feed line 12 which feeds a first accelerator.
  • the feed line 12 penetrates an S-shaped tailpipe 13. This is followed by a shut-off valve 14, which is provided with a C-coupling 15 for a hose, not shown, through which compressed air via the opened valve 14 through the nozzle insert 10 into the pipe 7 can be introduced.
  • the mouth of the pipe socket 6 is designated 16 and lies between the end 9 and the opposite end 17 of the pipe 7.
  • the end 17 is to be connected by a union nut 18 to the end of a conducting hose 19.
  • the union nut acts on a protective tube 20 which is fastened on the conducting tube 19 with the aid of a plurality of radially arranged screws 21.
  • the free end 22 of the conducting tube 19 is in turn provided with a protective tube 23 and a union nut 24.
  • the union nut is used to connect a pipe sleeve 25, on the circumference of which a plurality of nozzles 26, each offset by 45 degrees, are attached.
  • a second accelerator acts on the nozzles via a nipple 27 and an angle piece 28 from a hose line 29
  • a short tube 30 which can be designed in the form of a nozzle, i. H. is tapered towards the free blowing end 31.
  • the entire part reaching to the union nut 18 of the device described is placed on the sole or on the floor of a building or z. B. attached to a mast carrying a work platform or a basket on which a worker stands.
  • the worker only picks up the front part of the device, namely the tube 30, which is connected to the deposited or fastened part of the device by the conducting tube 19. It directs the blow-out opening 31 onto the building surface to be sprayed with concrete and guides the opening 31 evenly and in accordance with the formation of a desired layer thickness over this surface.
  • the compressed air stream emerging behind the insert 10 is initially acted upon by the first accelerator via the nozzle 11, the liquid accelerator being broken up into fine drops which are distributed in the compressed air flow.
  • the compressed air flow breaks up the dense flow of the building material, which is brought through the line 2.
  • the building material and water particles of the hydromechanical conveying are suspended in the compressed air flow.
  • This suspension is conveyed through the conducting hose 19 into the sleeve 25, which extends from the outside inwards in the radial direction distributes the also liquid second accelerator to the flow under high pressure.
  • This accelerator leads to a rapid hardening of the building material, which is therefore discharged directly through the nozzle tube 30 and the blow-out opening 31.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Nozzles (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP86108249A 1985-06-28 1986-06-17 Vorrichtung zum pneumatischen Ausbringen eines hydromechanisch in Dichtstrom geförderten, erhärtenden Baustoffes, insbesondere eines hydraulischen Spritz-betons oder -mörtels Expired - Lifetime EP0206224B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86108249T ATE49264T1 (de) 1985-06-28 1986-06-17 Vorrichtung zum pneumatischen ausbringen eines hydromechanisch in dichtstrom gefoerderten, erhaertenden baustoffes, insbesondere eines hydraulischen spritz-betons oder -moertels.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3523143 1985-06-28
DE3523143A DE3523143C2 (de) 1985-06-28 1985-06-28 Vorrichtung zum pneumatischen Ausbringen eines hydromechanisch im Dichtstrom geförderten, erhärtenden Baustoffes, insbesondere eines hydraulischen Spritzbetons oder -mörtels

Publications (3)

Publication Number Publication Date
EP0206224A2 EP0206224A2 (de) 1986-12-30
EP0206224A3 EP0206224A3 (en) 1987-04-15
EP0206224B1 true EP0206224B1 (de) 1990-01-03

Family

ID=6274429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108249A Expired - Lifetime EP0206224B1 (de) 1985-06-28 1986-06-17 Vorrichtung zum pneumatischen Ausbringen eines hydromechanisch in Dichtstrom geförderten, erhärtenden Baustoffes, insbesondere eines hydraulischen Spritz-betons oder -mörtels

Country Status (11)

Country Link
US (1) US4978073A (ko)
EP (1) EP0206224B1 (ko)
JP (1) JPS6259764A (ko)
KR (1) KR930001629B1 (ko)
AT (1) ATE49264T1 (ko)
BR (1) BR8602993A (ko)
CA (1) CA1338560C (ko)
DD (1) DD247941A5 (ko)
DE (2) DE3523143C2 (ko)
ES (1) ES8708037A1 (ko)
ZA (1) ZA864781B (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108019384A (zh) * 2017-12-13 2018-05-11 广新海事重工股份有限公司 一种简易快捷的抽水装置

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DE3830479A1 (de) * 1988-09-08 1990-03-15 Tricosal Gmbh Verfahren und vorrichtung zum dosieren von fluessigen erstarrungsbeschleunigern zum austragen von spritzbeton
JPH02280410A (ja) * 1989-04-20 1990-11-16 Takeshi Ikeda Ｌｃノイズフィルタ
AT402484B (de) * 1994-03-09 1997-05-26 Strobl Josef Vorrichtung zum verarbeiten und einbringen von mörtel
EP0957772A2 (en) * 1995-06-06 1999-11-24 Quantic Biomedical Partners Wound sealant preparation and application device and method
DE19705400A1 (de) * 1997-02-13 1998-08-20 Walter Barth Mehrfachdüsen-Vorrichtung zur Verputzaufbringung o. dgl. an Baukörpern
DE19831544A1 (de) * 1998-07-14 2000-01-20 Rentzsch Gmbh Verfahren zum Aufbringen von Weichmassen sowie Vorrichtung zum maschinellen Auftragen von Weichmasse auf Wand- Boden- oder Dachflächen von Bauwerken
DE102007018567B4 (de) * 2007-04-18 2012-07-12 INOTEC GmbH Transport- und Fördersysteme Schlauchgebundene Einhandklebepistole zum Auftrag von pastösen Werkstoffen auf Bauuntergründe
CN101725252B (zh) * 2009-12-22 2011-07-06 三一重型装备有限公司 混凝土输送装置
US9540281B2 (en) * 2013-11-07 2017-01-10 Air Krete, Inc. Progressive bubble generating system used in making cementitious foam
CN103741957B (zh) * 2013-12-27 2017-08-25 深圳市富诚幕墙装饰工程有限公司 整体式高压喷枪
DE102016124102A1 (de) * 2016-12-12 2018-06-14 Refratechnik Holding Gmbh Mischdüse für eine Spritzbetonauftragsvorrichtung, sowie Spritzbetonauftragsvorrichtung mit einer derartigen Mischdüse und Spritzbetonauftragsverfahren
CN108222966A (zh) * 2017-12-26 2018-06-29 彭斌明 一种隧道施工用喷浆设备
CN113622670B (zh) * 2021-08-16 2022-07-26 方远建设集团股份有限公司 一种装配式施工用的高压灌浆装置

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DE3335953C2 (de) * 1983-10-04 1985-10-31 Friedrich Wilh. Schwing Gmbh, 4690 Herne Vorrichtung zum pneumatischen Ausbringen eines hydromechanisch im Dichtstrom geförderten hydraulischen Baustoffes des Untertagebetriebes

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108019384A (zh) * 2017-12-13 2018-05-11 广新海事重工股份有限公司 一种简易快捷的抽水装置

Also Published As

Publication number Publication date
BR8602993A (pt) 1987-02-17
EP0206224A3 (en) 1987-04-15
ES8708037A1 (es) 1987-09-01
DE3668034D1 (de) 1990-02-08
JPS6259764A (ja) 1987-03-16
CA1338560C (en) 1996-08-27
US4978073A (en) 1990-12-18
JPH0415348B2 (ko) 1992-03-17
ATE49264T1 (de) 1990-01-15
DD247941A5 (de) 1987-07-22
KR870000147A (ko) 1987-02-16
KR930001629B1 (ko) 1993-03-08
DE3523143A1 (de) 1987-01-08
ES556661A0 (es) 1987-09-01
ZA864781B (en) 1987-03-25
EP0206224A2 (de) 1986-12-30
DE3523143C2 (de) 1998-02-05

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