EP0284830A2 - Ensemble à buse de mélange et de pulvérisation - Google Patents

Ensemble à buse de mélange et de pulvérisation Download PDF

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Publication number
EP0284830A2
EP0284830A2 EP88103500A EP88103500A EP0284830A2 EP 0284830 A2 EP0284830 A2 EP 0284830A2 EP 88103500 A EP88103500 A EP 88103500A EP 88103500 A EP88103500 A EP 88103500A EP 0284830 A2 EP0284830 A2 EP 0284830A2
Authority
EP
European Patent Office
Prior art keywords
water
nozzle
ring
section
cross
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Withdrawn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
EP88103500A
Other languages
German (de)
English (en)
Other versions
EP0284830A3 (fr
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 EP0284830A2 publication Critical patent/EP0284830A2/fr
Publication of EP0284830A3 publication Critical patent/EP0284830A3/fr
Withdrawn legal-status Critical Current

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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
    • B05B7/149—Spray pistols or apparatus for discharging particulate material with separate inlets for a particulate material and a liquid to be sprayed
    • 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 concrete dry spraying, with a mixture inlet and a water supply arranged around it, with means for the current continuous change of the water injection opening cross section during operation, which cross section consists of individual nozzle openings, and with a nozzle designed as a water pressure chamber.
  • a mixing nozzle has 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 thus it cannot be adapted to the conditions during operation.
  • this ring nozzle basically has the disadvantage that the gap width becomes very small with small amounts of water to be added, which requires precise processing and setting of the ring gap for precise water metering, a condition which can no longer be guaranteed with mixing nozzles in concrete dry spraying machines after some operating time , with which the inflowing amount of water becomes uncontrollable.
  • the prior art also includes a nozzle of a concrete spraying machine, in which an annular gap is adjusted in its width by adjusting the length of the concrete delivery pipe in a conical intermediate piece, thereby regulating the amount of compressed air added. While such a quantity regulation for the medium air with the help of the annular gap is sufficiently precise, it is completely unsuitable for regulating the addition of water.
  • This nozzle does regulate the compressed air amount possible during operation, but does not bring a usable solution with regard to the admixture of water in the sense of this disclosure. (DE-A 2 622 076)
  • US Pat. No. 2,124,989 shows a solution to a problem that has apparently been pending since 1936, namely the attempt to make individual nozzles that radiate water to the cement jet adjustable in operation by changing the cross section from the outside.
  • a rotating ring with a number of bores is provided, the rotational movement of which changes the inflow cross section of the nozzle bores present in the cement-bearing inner ring.
  • a method for mixing dry mixture and water during dry spraying in particular concrete dry spraying method, has also become known, in which in a mixing tube which is flowed axially by dry mixture, this dry mixture is mixed with air / water mixture flowing transversely to the axial direction from injection channels 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 the amount of water can be corrected by changing the nozzle cross-section immediately before the water outlet during operation and the simple adaptation to the current conditions is made possible at a substantially constant constant jet speed.
  • the spray mixing nozzle assembly according to the invention achieves this object in that a manually operable regulating device is provided for the hydraulic displacement of a water nozzle cross-sectional change operation.
  • 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 serves, inter alia, to receive a water nozzle ring 12 and, on the other hand, a metering sleeve 18. Between the nozzle ring 12 and the metering sleeve 18 there is a ring insert 17 in the front part. The corresponding sealing is ensured by O-rings 10, 11, 13 and 14.
  • a plastic nozzle 16 for example made of Vulcollan, is inserted into the pistol piece 5, its axial holding being done by a corresponding thread in the piece 5.
  • the nozzle ring 12 is in the pistol piece 5 and in the ring insert 17. It is secured against axial displacement forward by an annular stop 22, referred to as a snap ring.
  • the metering sleeve 18 has a groove-shaped annular space, which is referred to as the water nozzle antechamber 19. It also serves to accommodate an elastic grooved ring 20. As can be seen, this is rotatably, but axially positively guided, arranged in the metering sleeve 18.
  • Such grooved rings 20 are commercially available under the name "Gaco rings”.
  • the metering 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 space 19.
  • the chamber 30 is in turn connected via radial bores 23 in the ring insert 17 to an outer ring chamber 24, formed between the pistol piece 5 and the ring insert 17, which in turn is fed with wetting water via the water supply angle nipple 31 becomes.
  • An open / close ball valve is provided that blocks or releases the water flow from the connection nipple. It is operated using a handle on the ball valve (not shown).
  • a regulating device 40 which, by means of the actuation of a handwheel 41, enables the entry cross section of the water nozzles 28 to be changed by axially displacing the grooved ring 20.
  • the regulating device 40 comprises a cylinder jacket 42, one end of which is closed by a welded-on base 44. The other end carries an external thread for receiving a union nut 45 with guide socket 46 for receiving an adjusting spindle 47.
  • the part 49 of the spindle 47 which projects into the interior of the cylinder 48 carries a piston 50. This is by means of a bolt 52 which is in a groove 53 of the cylinder jacket 42 is axially displaceable, but is non-rotatably designed.
  • the adjusting spindle 47 is connected to the piston 50 via a right-hand thread 54. It is rotatable, but axially fixed.
  • the handwheel 41 is attached to its end protruding from the cylinder 50.
  • the two cylinder spaces 56 and 57 are hydraulically separated from one another and outwardly by sealing rings 58, 59 and 61.
  • Two screw plugs 64 and 65 close two hydraulic fluid refill ports 66 and 67 for the two hydraulically separate systems with the cylinder spaces 56 and 57. From these two spaces 56 and 57, a bore 69 and 70 each leads to an annular space 71 and 72. These spaces 71 and 72 are on both sides of a piston part 74 of the metering sleeve 18, which Rooms 71 and 72 are separated from each other by the O-ring 9.
  • the regulating device 40 is screwed to the cylinder jacket 42 by means of four screws 75.
  • the two screw plugs 77 and 78 are used to vent rooms 71 and 72.
  • the two separate hydraulic systems with rooms 56 and 72 or 57 and 71 always have constant volumes. Hydraulic oil can be used as the liquid.
  • the water flow to the nipple 31 is normally fully opened.
  • the grooved ring 20 is in its half-open position (FIGS. 1 and 3), in which the water nozzles 28 are half-open.
  • the piston 50 is in the region of its central position. Now, in order to close the nozzles 28 completely, the handwheel 41 is turned clockwise. The piston 50 moves to the left and presses oil from the space 56 through the bore 70 into the space 72. During the movement of the piston 50, the piston part 74 and with it the dosing sleeve 18 in FIG. 1 are shifted to the left and with it the grooved ring 20, which closes the nozzles 28 more and more.
  • the grooved ring 20 which is rotatably arranged in the dosing sleeve 18, is also displaced in the axial direction, so that it now opens the water nozzles 28 with respect to their inlet cross section in accordance with the axial position of the dosing sleeve 18 or the grooved ring 20.
  • the nozzle jet cross-section By appropriate inclination of these nozzles 28 with respect to the longitudinal axis of the unit and possibly 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.
  • this unit is very simple in every respect and the screw connections with the simple sealing arrangements allow the unit to be dismantled and reassembled easily and quickly.
  • the hydraulic regulation is very easy to use and the dosage of the water addition can be optimally adjusted or adjusted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Nozzles (AREA)
EP88103500A 1987-03-30 1988-03-07 Ensemble à buse de mélange et de pulvérisation Withdrawn EP0284830A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1211/87 1987-03-30
CH121187 1987-03-30

Publications (2)

Publication Number Publication Date
EP0284830A2 true EP0284830A2 (fr) 1988-10-05
EP0284830A3 EP0284830A3 (fr) 1989-07-05

Family

ID=4205108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88103500A Withdrawn EP0284830A3 (fr) 1987-03-30 1988-03-07 Ensemble à buse de mélange et de pulvérisation

Country Status (3)

Country Link
EP (1) EP0284830A3 (fr)
JP (1) JPS6414467A (fr)
ZA (1) ZA882230B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644711A1 (fr) * 1989-03-02 1990-09-28 Sandoz Sa Systemes de buses melangeuses pour pulverisation, specialement pour la pulverisation a sec du beton
WO2002053337A1 (fr) * 2000-12-18 2002-07-11 Feda Alicehajic Buse pour pulveriser du ciment a sechage rapide
CN108915221A (zh) * 2018-09-25 2018-11-30 金陵科技学院 建筑外墙粉刷机
CN115012418A (zh) * 2022-06-15 2022-09-06 中建八局轨道交通建设有限公司 基坑边坡施工用的可调空压喷射机手持枪

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
DE713595C (de) * 1938-08-06 1941-11-11 Teves Kg Alfred Hydraulische Fernsteuerung
FR2233823A5 (fr) * 1973-06-14 1975-01-10 Cibie Projecteurs
WO1987001648A1 (fr) * 1985-09-11 1987-03-26 Aliva Aktiengesellschaft Buse melangeuse de projection

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
DE713595C (de) * 1938-08-06 1941-11-11 Teves Kg Alfred Hydraulische Fernsteuerung
FR2233823A5 (fr) * 1973-06-14 1975-01-10 Cibie Projecteurs
WO1987001648A1 (fr) * 1985-09-11 1987-03-26 Aliva Aktiengesellschaft Buse melangeuse de projection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644711A1 (fr) * 1989-03-02 1990-09-28 Sandoz Sa Systemes de buses melangeuses pour pulverisation, specialement pour la pulverisation a sec du beton
DE4006091C2 (de) * 1989-03-02 2001-09-13 Mbt Holding Ag Zuerich Spritzmischdüsenaggregat, insbesondere für das Beton-Trockenspritzen
WO2002053337A1 (fr) * 2000-12-18 2002-07-11 Feda Alicehajic Buse pour pulveriser du ciment a sechage rapide
CN108915221A (zh) * 2018-09-25 2018-11-30 金陵科技学院 建筑外墙粉刷机
CN115012418A (zh) * 2022-06-15 2022-09-06 中建八局轨道交通建设有限公司 基坑边坡施工用的可调空压喷射机手持枪

Also Published As

Publication number Publication date
ZA882230B (en) 1988-09-21
EP0284830A3 (fr) 1989-07-05
JPS6414467A (en) 1989-01-18

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