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WO1987001648A1 - Buse melangeuse de projection - Google Patents

Buse melangeuse de projection Download PDF

Info

Publication number
WO1987001648A1
WO1987001648A1 PCT/CH1986/000122 CH8600122W WO8701648A1 WO 1987001648 A1 WO1987001648 A1 WO 1987001648A1 CH 8600122 W CH8600122 W CH 8600122W WO 8701648 A1 WO8701648 A1 WO 8701648A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
nozzle
ring
mixing nozzle
spray
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.)
Ceased
Application number
PCT/CH1986/000122
Other languages
German (de)
English (en)
Inventor
Ernst Egli
Rudolf Mathis
Gerd Kreinacke
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.)
Sika Equipment AG
Original Assignee
Aliva AG
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 Aliva AG filed Critical Aliva AG
Publication of WO1987001648A1 publication Critical patent/WO1987001648A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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

Definitions

  • the present invention relates to a spray mixing nozzle assembly, in particular for dry concrete spraying, with a mixture inlet and a water supply arranged around it.
  • a mixing nozzle has indeed become known in which the gap width for the water inflow can be adjusted.
  • This design has the fundamental disadvantage that the adjustability is only possible when the nozzle is disassembled and therefore it cannot be adapted to the conditions during operation.
  • this ring nozzle basically has the disadvantage
  • a method for mixing dry mix and water during dry spraying, in particular concrete dry spraying process has also become known, in which in a mixing tube which is flowed axially by dry mix, this dry mix with air / water flowing from injection channels transversely to the axial direction is mixed and mixed. The air and water are premixed before the air / water mixture emerges into the interior of the mixing tube.
  • the present invention aims to provide a spray mixing nozzle assembly, in which essentially constant water jet speed to correct the amount of water by changing the nozzle cross section immediately before the water escapes during operation and to enable it to be adapted to the current conditions.
  • several inlet openings are to be designed in such a way that, even with the smallest amount of water required, certain minimum dimensions of the outlet cross sections are not undershot in order to prevent blockages of individual nozzle cross sections.
  • the spray mixing nozzle assembly achieves this object in that the means are also designed for the instantaneous, infinitely variable changing of the water injection opening cross section during operation, which consists of individual nozzle openings that run obliquely to the main direction of movement of the mixture, and that a nozzle pre-chamber designed as a pressure chamber is provided to control the nozzle outflow speed of the water over the entire control range
  • the nozzle openings being dimensioned and arranged in such a way that the risk of clogging by impurities in the water is minimized.
  • a spray mixing nozzle assembly 1 is provided for receiving a concrete supply hose 2. This is inserted into a tube holding sleeve 3 and held there. This sleeve 3 is followed by a so-called gun piece 5, which is connected to the sleeve 3 by means of an all-round weld seam 6.
  • the pistol piece 5 is provided at both ends with a thread 7 and 8, which on the one hand is screwed in with water.
  • nozzle ring 12 and on the other hand serves a metering sleeve 18.
  • the corresponding sealing is ensured by two O-rings 10 and 11.
  • the water nozzle ring 12 has an end thread at the other end
  • a plastic nozzle 16 for example made of Vulcollan, is inserted therein, the axial retention of which is done by a corresponding thread in this holder 15.
  • the metering sleeve 18 has a groove-shaped annular space, which is referred to as the water nozzle antechamber 19. It also serves to receive a grooved ring 20. As can be seen, this is rotatably, but axially positively guided, arranged in the metering sleeve 18.
  • the rear part of the nozzle holder 15 is covered by an adjusting ring 22, which is detachably connected to the dosing sleeve 18 via a cap screw 23 and its threaded pin 24.
  • the adjusting ring 22 is connected to an adjusting wheel 27 via spokes 26.
  • the water nozzles 28, which are normally arranged substantially uniformly on the circumference of the water nozzle ring 12, are slot-shaped and inclined to the longitudinal axis of the nozzle, running essentially radially, the elevation view of two nozzles being rotated in section.
  • the dosing sleeve 18 is offset with respect to the water nozzle ring 12 in such a way that an annular water passage 29 is formed, through which the water from a water distribution chamber 30 enters the interior of the metering sleeve 18.
  • the water is fed into the water distribution chamber 30 via an angled nipple 31, an open / close ball valve 33 blocking or releasing the water inflow from the connecting nipple 34. It is actuated by means of a handle 36 of the ball valve 33.
  • the adjusting wheel 27 By turning the adjusting wheel 27, the adjusting ring 22 is also rotated via the spokes 26 and the metering sleeve 18 is taken along with it by means of the threaded pins 24. Since this is connected via the thread 7 to the fixed part of the unit, designated as the pistol piece 5, the wheel 27 is turned the osierhülse 18 rotated and thereby, according to the pitch of the thread 1, axially displaced.
  • the nut ring 20 which is rotatably arranged in the metering sleeve 18, is also displaced in the axial direction, so that it, according to the axial position of the metering sleeve 18, or of the nut ring 20 , the water nozzles 28 with respect to their inlet cross-section more or less free.
  • the nozzle jet cross section By appropriately inclining these nozzles 28 with respect to the longitudinal axis of the unit and, if appropriate, the nozzle cross section, it is possible to change the nozzle jet cross section while maintaining the delivery pressure of the added water. This means that the amount of water added can be changed unambiguously and easily and continuously, with the water jet exit velocity remaining essentially the same.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Nozzles (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

La buse mélangeuse de projection, notamment pour la projection sèche de béton, comporte une alimentation de mélange de béton sec et disposée autour de cette dernière une amenée d'eau. Un anneau d'arrivée d'eau (12), sur lequel sont disposées des ouvertures (28) pour l'eau, inclinées radialement sur l'axe longitudinal de l'anneau et, de préférence réparties uniformément sur le pourtour de l'anneau, permet de modifier constamment la section de l'ensemble des ouvertures (28) pour l'eau immédiatement avant sa rencontre avec le mélange de béton. Dans cette buse mélangeuse, la quantité d'eau est réglée par modification de la section de buse immédiatement avant la sortie de l'eau tout en gardant une vitesse de projection constante.
PCT/CH1986/000122 1985-09-11 1986-09-01 Buse melangeuse de projection Ceased WO1987001648A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH392285 1985-09-11
CH3922/85-2 1985-09-11

Publications (1)

Publication Number Publication Date
WO1987001648A1 true WO1987001648A1 (fr) 1987-03-26

Family

ID=4266377

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1986/000122 Ceased WO1987001648A1 (fr) 1985-09-11 1986-09-01 Buse melangeuse de projection

Country Status (4)

Country Link
EP (1) EP0236366A1 (fr)
JP (1) JPS63500858A (fr)
WO (1) WO1987001648A1 (fr)
ZA (1) ZA866310B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284830A3 (fr) * 1987-03-30 1989-07-05 Aliva Aktiengesellschaft Ensemble à buse de mélange et de pulvérisation
FR2644711A1 (fr) * 1989-03-02 1990-09-28 Sandoz Sa Systemes de buses melangeuses pour pulverisation, specialement pour la pulverisation a sec du beton
US5005768A (en) * 1989-06-29 1991-04-09 Elkem A/S Spray nozzle
US5080127A (en) * 1989-03-16 1992-01-14 Elkem A/S Dosing pump system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2124989A (en) * 1936-03-12 1938-07-26 John E Smith Cement spray device
US3788353A (en) * 1970-02-02 1974-01-29 Spirolet Corp Nozzle
DE2622076A1 (de) * 1975-06-11 1976-12-30 Arge Nasspritzbeton Betonspritzmaschine
DE3408007A1 (de) * 1984-03-03 1985-09-05 Wilhelm Müller, Maschinenfabrik, 4710 Lüdinghausen Betonspritzduese fuer schaumbeton, schaummoertel oder dergleichen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2124989A (en) * 1936-03-12 1938-07-26 John E Smith Cement spray device
US3788353A (en) * 1970-02-02 1974-01-29 Spirolet Corp Nozzle
DE2622076A1 (de) * 1975-06-11 1976-12-30 Arge Nasspritzbeton Betonspritzmaschine
DE3408007A1 (de) * 1984-03-03 1985-09-05 Wilhelm Müller, Maschinenfabrik, 4710 Lüdinghausen Betonspritzduese fuer schaumbeton, schaummoertel oder dergleichen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284830A3 (fr) * 1987-03-30 1989-07-05 Aliva Aktiengesellschaft Ensemble à buse de mélange et de pulvérisation
FR2644711A1 (fr) * 1989-03-02 1990-09-28 Sandoz Sa Systemes de buses melangeuses pour pulverisation, specialement pour la pulverisation a sec du beton
US5080127A (en) * 1989-03-16 1992-01-14 Elkem A/S Dosing pump system
US5005768A (en) * 1989-06-29 1991-04-09 Elkem A/S Spray nozzle

Also Published As

Publication number Publication date
EP0236366A1 (fr) 1987-09-16
JPS63500858A (ja) 1988-03-31
ZA866310B (en) 1987-04-29

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