EP0922550A1 - Dispositif de projection de matériaux de construction humidifiés - Google Patents

Dispositif de projection de matériaux de construction humidifiés Download PDF

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Publication number
EP0922550A1
EP0922550A1 EP97121357A EP97121357A EP0922550A1 EP 0922550 A1 EP0922550 A1 EP 0922550A1 EP 97121357 A EP97121357 A EP 97121357A EP 97121357 A EP97121357 A EP 97121357A EP 0922550 A1 EP0922550 A1 EP 0922550A1
Authority
EP
European Patent Office
Prior art keywords
building material
dry building
water
swirl
dry
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.)
Withdrawn
Application number
EP97121357A
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German (de)
English (en)
Inventor
Albrecht Rombold
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.)
Rombold & Gfrohrer & Co KG GmbH
Original Assignee
Rombold & Gfrohrer & Co KG 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 Rombold & Gfrohrer & Co KG GmbH filed Critical Rombold & Gfrohrer & Co KG GmbH
Priority to EP97121357A priority Critical patent/EP0922550A1/fr
Publication of EP0922550A1 publication Critical patent/EP0922550A1/fr
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the invention relates to a device for spraying moistened dry building materials in the dry spray process, in particular of shotcrete or shot mortar, with a Storage container for the dry building material, one den Dry building material in a delivery line or Conveying hose metering dosing element, one Compressed air source for the supply of conveying air, a water connection for water to moisten the Dry building materials as well as a spray nozzle and one Humidification device for the dry building material.
  • Shotcrete is used in tunnel, gallery and Mining, for securing embankments and construction pits, for the renovation of buildings, bridges, tunnels and canals, as well as for building conservation and monument protection used.
  • One of the big advantages of Dry spraying is because the Dry building material in large quantities in storage containers Can be stored on site and as required Removed storage container and with water in one ready to use condition.
  • Storage containers serve, for example, pressure silos, pressure silo wagons, Drucksilo-Spritzmobile etc.
  • the dry building material becomes the storage container by means of a dosing blow screw removed and blown into a delivery hose.
  • the required water is only at the end of Delivery hose, that is, added to the spray nozzle, so that the dry building material in the humidified state as Shotcrete is blown out through the spray nozzle.
  • This method has the disadvantage shows that the dry building material is not even is moistened so that when you blow out the humidified Dry building materials to a more or less large Dust is coming.
  • the applicant therefore has one Humidifier developed by means of which a Air-water mixture in an area in front of the spray nozzle added dry building material conveyed in the delivery hose is, whereby the dry building material is pre-moistened. On in this way the advantage was achieved that the Dry building material is moistened much more evenly, whereby the dust development was considerably reduced.
  • the invention is based on this prior art based on the task of moistening the dry building material continue to even out and the dust development continues to reduce.
  • This task is the beginning of a device mentioned type according to the invention solved in that the Is provided with a swirl device, over which a swirl is imposed on the dry building material and then the dry building material water over a Water nozzle is added.
  • the device according to the invention has the essential Advantage that the swirl sensor, which the Dry building material imposes a twist, an intense one Turbulence of the conveyed dry building material reached becomes.
  • this swirling dry building material is now Water injected and intensely with the dry building material mixed.
  • the water nozzle is located directly on the Output of the swirler so that after the addition of the Water the dry building material still over a certain Conveyor line is further swirled. It can now, depending on Embodiment, either all the water required be added or only a part of the required water, so the dry building material is only pre-moistened. The remaining water will then the pre-moistened dry building material in the spray nozzle added.
  • the water nozzle is designed as an annular nozzle. Ring nozzles have that essential advantage that they the water at the circumference of the Apply flow rate and wet it evenly.
  • the nozzles can open out radially from the water nozzle or be arranged in the ring nozzle such that they form parallel beams, creating a Water curtain arises.
  • This parallel Beams can be arranged in a second, next to it Rays directed perpendicular to the plane be upstream.
  • the flow rate is influenced via this cone in such a way that the dry matter is essentially radially outward, that means towards the inner wall of the swirl generator is distracted.
  • the swirl encoder preferably has one sleeve-shaped inner wall on which guide devices are provided. Now the Direction of conveyance of the dry building material influenced. At a another embodiment is the cone after the swirler arranged.
  • the guidance devices are arranged helically and consist of at least one radially inward baffle.
  • This baffle is connected to the inner wall of the swirler and extends about 50% of the radius of the swirler. Since the Dry building material over the cone towards the The inner wall of the swirler is deflected by him the helical baffle forced a twist.
  • the of the helical swept angular range is between 90 ° and 360 ° and in a preferred embodiment, for example 160 ° to 200 °, especially 180 °.
  • Guide device is formed by guide vanes.
  • Guide vanes have the advantage of being single are interchangeable and depending on the type and amount of promoting dry building material more or less many Guide vanes can be provided.
  • the swirl sensor is in a pre-humidifier provided, which is located in an intermediate section of the Delivery line is located. There is the dry building material mixed intensively with part of the added water. The remaining water is added to the spray nozzle.
  • the Swirl device in the inlet of the spray nozzle, so that with this Version all the water can be added.
  • a further training provides that the swirl generator and the Water nozzle are arranged in an intermediate accelerator, over which the pre-moistened dry building material by means of additional conveying air is accelerated. Through the additional conveying air will further accelerate and thus a further swirling of the pre-moistened Dry building material achieved.
  • the Intermediate accelerator one the swirl generator and the Water nozzle coaxially encompassing sleeve that the Sleeve tapered at its exit and the Swirl sensor tires with the water nozzle in the cone.
  • FIG. 1 is a schematic representation of the Play device according to the invention, in which in a storage container 1 a dry building material 2, for example is stored for shotcrete or the like.
  • the Storage container 1 is via a compressed air line 3, in which a boiler fill valve 4 is provided to a Compressed air line 5 connected.
  • This compressed air line 5 is via a main tap 6 with a not shown Compressed air source connected via which compressed air in Direction of arrow 7 is promoted.
  • This metering element 10 is a Slider 11 with the outlet 12 of the storage container 1 connected.
  • the slide 11 If the slide 11 is opened, the flows Dry building material 2 via the outlet 12 into the metering element 10 and is via a dosing blow screw 13 in one Conveyed hose 14 promoted.
  • a spray nozzle 15 At the end of the delivery hose 14 there is a spray nozzle 15, on which a Water connection 16 is provided.
  • the dosing blow screw 13 promotes the dry building material in the direction of Delivery hose 14, with a central tube 17, which is connected to the compressed air line 8, air in blown in the requested dry building material 2 and thereby the dry building material 2 into the delivery line 14 is promoted.
  • the metering element 10 is with a delivery hose 14 and spray nozzle 15 shown in more detail.
  • a moistening device 18 on has a central cone 20 at its inlet 19 which is followed by a swirler 21.
  • a water nozzle 22 Immediately on At the end of the swirl generator 21 there is a water nozzle 22, which is designed as an annular nozzle 23.
  • This water nozzle 22 has two opposing water connections 24 so that the water flows evenly from the water nozzle 22 is released to the flowing dry building material 2.
  • the cone 20 has the function of arriving Deflect dry building material 2 in the direction of the inner wall 25.
  • the inner wall 25 of the swirl generator 21 is, as from FIG. 4 clearly recognizable, provided with guide walls 26.
  • This Baffles 26 extend from the inner wall 25 of the Swirl generator 21 radially inward and are with the inner wall 25 connected via weld seams 27.
  • the baffles 26 run, which cannot be seen from FIG. 4, helically along the inner wall 25, which is shown in FIG. 5 is indicated.
  • the inflowing dry building material 2 after deflection in the radial direction (arrows 28 in Figure 2) on the inner wall 25 through the guide walls 26 Swirl forced. This causes the dry building material 2 is swirled intensely. Swirled in these Dry building material 2 becomes water via the water nozzle 22 injected, thereby moistening the dry building material 2.
  • the Swirl generator 21 surrounded by an intermediate accelerator 29 is. Between the wall 30 of the intermediate accelerator 29 and the inner wall 25 of the swirler 21 is located Cavity 31, which via a compressed air line 32 to the Compressed air source is connected. The free end of the Cavity 31 is designed so that the water nozzle 22 of the compressed air can flow around, so that the air in In the direction of arrows 33 flows into a cone 34. In this cone 34 also opens the swirl generator 21 on the Water nozzle 22. In this way, the pre-moistened Dry building material 2 surrounded by an air jacket and in the Conveying hose 14 is conveyed in the direction of the spray nozzle 15. Baking of the pre-moistened dry building material 2 am Cone 34 or at the entrance to the conveyor hose 14 is on avoided this way. It also talks about the additional Compressed air accelerates the pre-moistened dry building material 2 and also swirled.
  • adding the water can be adjusted directly at the spray nozzle 15.
  • the addition of water at the water connection 24 can be above normal pressure or via a high pressure line.
  • Figure 3 shows an embodiment in which the Swirl generator 21 with intermediate accelerator 29 directly on Entrance to the spray nozzle 15 are.
  • On the Water connection 24 can contain all of the water to be added can be supplied, with an optimal Mixing of the dry building material 2 achieved with the water is because the dry building material 2 via the swirl 21 is swirled intensely.
  • the type and amount of Spraying dry building material 2 becomes the embodiment according to FIG. 2 or the embodiment according to FIG. 3 used.
  • the dust development reduced to a minimum.
  • the variant according to FIG. 3 can also do without the intermediate accelerator 29 become.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
EP97121357A 1997-12-04 1997-12-04 Dispositif de projection de matériaux de construction humidifiés Withdrawn EP0922550A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97121357A EP0922550A1 (fr) 1997-12-04 1997-12-04 Dispositif de projection de matériaux de construction humidifiés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97121357A EP0922550A1 (fr) 1997-12-04 1997-12-04 Dispositif de projection de matériaux de construction humidifiés

Publications (1)

Publication Number Publication Date
EP0922550A1 true EP0922550A1 (fr) 1999-06-16

Family

ID=8227741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97121357A Withdrawn EP0922550A1 (fr) 1997-12-04 1997-12-04 Dispositif de projection de matériaux de construction humidifiés

Country Status (1)

Country Link
EP (1) EP0922550A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020139557A1 (fr) * 2018-12-26 2020-07-02 Exxonmobil Research And Engineering Company Systèmes et procédés de préparation de matériaux secs et de réduction des poussières respirables

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743187A (en) * 1970-02-02 1973-07-03 Spirolet Corp Nozzle
US3788353A (en) * 1970-02-02 1974-01-29 Spirolet Corp Nozzle
DE3408007A1 (de) * 1984-03-03 1985-09-05 Wilhelm Müller, Maschinenfabrik, 4710 Lüdinghausen Betonspritzduese fuer schaumbeton, schaummoertel oder dergleichen
EP0509966A1 (fr) * 1991-04-03 1992-10-21 B.V. di VISINI GIANPIERO & C. S.n.c. Equipement pour préparer, transporter et distribuer du mortier, du platre et/ou agrégats granulaires ou matériaux poudreux

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743187A (en) * 1970-02-02 1973-07-03 Spirolet Corp Nozzle
US3788353A (en) * 1970-02-02 1974-01-29 Spirolet Corp Nozzle
DE3408007A1 (de) * 1984-03-03 1985-09-05 Wilhelm Müller, Maschinenfabrik, 4710 Lüdinghausen Betonspritzduese fuer schaumbeton, schaummoertel oder dergleichen
EP0509966A1 (fr) * 1991-04-03 1992-10-21 B.V. di VISINI GIANPIERO & C. S.n.c. Equipement pour préparer, transporter et distribuer du mortier, du platre et/ou agrégats granulaires ou matériaux poudreux

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020139557A1 (fr) * 2018-12-26 2020-07-02 Exxonmobil Research And Engineering Company Systèmes et procédés de préparation de matériaux secs et de réduction des poussières respirables
US11358814B2 (en) 2018-12-26 2022-06-14 ExxonMobil Technology and Engineering Company Systems and methods for preparing dry process materials and reducing respirable dust

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