EP0873793A2 - Spritzbetondüse mit geringem Rückprall - Google Patents
Spritzbetondüse mit geringem Rückprall Download PDFInfo
- Publication number
- EP0873793A2 EP0873793A2 EP98890094A EP98890094A EP0873793A2 EP 0873793 A2 EP0873793 A2 EP 0873793A2 EP 98890094 A EP98890094 A EP 98890094A EP 98890094 A EP98890094 A EP 98890094A EP 0873793 A2 EP0873793 A2 EP 0873793A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- shotcrete
- impact bodies
- nozzles
- shaped
- 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- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1481—Spray pistols or apparatus for discharging particulate material
Definitions
- the invention relates to the building industry. According to the state of the art Shotcrete is made by wet or in a simple or ring chamber nozzle humidified material through a conical acceleration part with high Speed is ejected (see DE 2 316 464). The impact on a solid Obstacle (for example the inner wall of the tunnel) provides the necessary compaction however, there is high wear, dust and rebound of the used concrete material.
- a solid Obstacle for example the inner wall of the tunnel
- the invention sets itself the goal of wear, dust generation and above all the Avoid rebound by designing the flow conditions in the nozzle, and Water and compressed air can be added at points where the task requires it.
- the compression should take place as far as possible in the nozzle, which also recoil to the nozzle guide is reduced, resulting in higher ejection performance enables.
- the invention consists of a tube or any shape Hollow body, characterized in that the cross section and shape are targeted be changed, for example by internals, such as impact bodies, extensions and constrictions of any shape as well as nozzles through which solid, liquid and gaseous reaction components and transport media fed to the process can be.
- a coupling (2) is attached to the delivery pipe or delivery hose (1)
- External impact bodies (4) and widenings (5) can be shaped arbitrarily, that is, both embrace and penetrate the nozzle as well as in segments inclined to the nozzle axis, whereby also a spiral guidance of the material flow with cyclone effect can be brought about.
- the rotation results in intensive mixing, also through Dead water areas on the impact bodies, the internal impact bodies also serving as Mixer tube with water addition functions (water and air) can be formed.
- the compressed air nozzles (9) arranged in the course of the nozzle body allow the Material flow can be accelerated and set in rotation.
- nozzles can be ring-shaped or spiral-shaped as well as individually, also with a tendency to Nozzle axis are arranged, mainly to brake the material flow.
- An advantage of the invention is the wide variety of these internals, depending according to whether more the effect of mixing or more the effect of compression and rebound reduction is desired. Quite similar to any wing Buoyancy and drag generated and yet by varying the profile and the Geometry of different flight characteristics can also be created here multiple possibilities of designing and optimizing the Flow conditions with the same basic effect of the characteristics (3) to (9) and their hydraulic interaction.
Landscapes
- Nozzles (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Description
Claims (5)
- Spritzbetondüse für das Trocken- oder Naßspritzverfahren bestehend aus einem länglichen Hohlkörper, gekennzeichnet durch einen Düsenkörper (3), mit einem oder mehreren Prallkörpern (4), Aufweitungen (5), Wasserzugabedüsen (6), innenliegenden Prallkörpern (7) mit Totwassergebieten (8) und Druckluftdüsen (9).
- Spritzbetondüse nach Anspruch 1, dadurch gekennzeichnet, daß die Wasserzugabe und/oder die Druckluftzugabe aus Düsen in den Prallkörpern (4) und/oder innenliegenden Prallkörpern (7) erfolgt.
- Spritzbetondüse nach Anspruch 1 oder 2 dadurch gekennzeichnet, daß die Prallkörper bolzen- oder tragflächenförmig ausgebildet und an zwei oder mehr Stellen mit dem Düsenkörper verbunden den Massestrom im Düseninneren aufteilen.
- Spritzbetondüse nach Anspruch 1 oder 2, wobei die Prallkörper ring- oder teilringförmig ausgebildet sind.
- Spritzbetondüse nach Anspruch 1 oder 2 oder 3 dadurch gekennzeichnet, daß die Prallkörper schräg zur Düsenachse verlaufen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT63297A AT405507B (de) | 1997-04-14 | 1997-04-14 | Spritzbetondüse für das trocken- oder nassspritzverfahren |
| AT632/97 | 1997-04-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0873793A2 true EP0873793A2 (de) | 1998-10-28 |
| EP0873793A3 EP0873793A3 (de) | 1999-04-21 |
Family
ID=3495734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98890094A Withdrawn EP0873793A3 (de) | 1997-04-14 | 1998-04-06 | Spritzbetondüse mit geringem Rückprall |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0873793A3 (de) |
| AT (1) | AT405507B (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE445168C (de) * | 1924-08-19 | 1927-06-04 | Andreas Doll | Spritzorrichtung zum Auftragen von Gipsputz auf Decken und Waende |
| US2021092A (en) * | 1931-02-09 | 1935-11-12 | Teliet Jean Antoine Marcel | Improved method and means for incorporating a fluid to a stream of a fluid or of a pulverulent solid |
| US2075867A (en) * | 1935-01-16 | 1937-04-06 | Sampel Henri | Cement gun nozzle |
| DE2316464A1 (de) * | 1973-04-03 | 1974-10-10 | Bergwerksverband Gmbh | Ringkammerduese zum foerdern von schuettguetern nach dem pneumatischen duennstromprinzip |
| DE2556797C3 (de) * | 1975-12-17 | 1979-11-08 | Kurt 5620 Velbert Wolf | Spritzmaschine für pulveiförmige Massen |
| SE411724B (sv) * | 1976-10-26 | 1980-02-04 | Sandell Bertil | Sett och anordning for att en luftstrom tillfora material till ett munstycke |
| DD250913A1 (de) * | 1986-07-08 | 1987-10-28 | Dresden Baumechanisierung | Duese zum spritzen von nassbeton |
| DE4002760A1 (de) * | 1990-01-12 | 1991-07-18 | Schwing Gmbh F | Betonpumpe fuer das nassspritzverfahren |
| DE29612769U1 (de) * | 1996-07-26 | 1996-11-07 | DMT-Gesellschaft für Forschung und Prüfung mbH, 45307 Essen | Einrichtung zur Benetzung von feinkörnigem Material |
-
1997
- 1997-04-14 AT AT63297A patent/AT405507B/de not_active IP Right Cessation
-
1998
- 1998-04-06 EP EP98890094A patent/EP0873793A3/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| ATA63297A (de) | 1999-01-15 |
| EP0873793A3 (de) | 1999-04-21 |
| AT405507B (de) | 1999-09-27 |
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Effective date: 19991022 |