GB2229653A - Nozzle assembly for spraying concrete - Google Patents
Nozzle assembly for spraying concrete Download PDFInfo
- Publication number
- GB2229653A GB2229653A GB9004272A GB9004272A GB2229653A GB 2229653 A GB2229653 A GB 2229653A GB 9004272 A GB9004272 A GB 9004272A GB 9004272 A GB9004272 A GB 9004272A GB 2229653 A GB2229653 A GB 2229653A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- concrete
- assembly
- cylinder
- flow
- 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.)
- Granted
Links
- 239000004567 concrete Substances 0.000 title claims description 29
- 238000005507 spraying Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 239000000203 mixture Substances 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 description 7
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- E04G2021/049—Devices for both conveying and distributing concrete mixing nozzles specially adapted for conveying devices
Description
Case 154-0184 MIXING SPRAY NOZZLE ASSEMBLY, ESPECIALLY FOR THE DRY
SPRAYING OP CONCRETE A nozzle assembly, for the application of sprayed concrete in "dry mixture" processes, has a passage for the dry concrete mixture and one or several nozzles to inject water into this dry mixture. Depending on the condition of the dry mixture and its flow rate, more or less water has to be mixed in.
One embodiment that has been proposed to to control the quantity of water being admixed is the use of a stop-cock in the supply pipe, so that the nozzle aperture remains the same but the rate of discharge of the water from the nozzle can be regulated by the stop-cock. This effects the extent of penetration of the water into the concrete and disrupts the homogeneity of the mixture as soon as the spray pressure becomes insufficient to moisten the concrete evenly. This problem is known per se and various proposals have already been made to adapt the nozzle aperture to the changing demands.
To overcomb this, mixing spray nozzle assemblies having a ring nozzle have been suggested which require disassembling to change the size of the aperture. Such a design can thus only be adjusted before operation. Any alteration during operation is only made possible by having a long break in operation, so that neither variations in the composition of the concrete nor variations in the water pressure can be quickly balanced out.
This disadvantage has been partly eliminated in never assemblies, in that a number of nozzles are provided of differing aperture and the particular size of aperture to be used is then brought into operation Case 154-0184 externally during operation. Such assemblies however have two disadvantages. One is that the operator using the assembly must always adapt the nozzle aperture to the amount of water supplied, which not only requires great attentiveness during work, but also requires a lot of experience in dealing with such a assembly. The other is that the nozzles very easily become blocked, whereupon due to the increase in pressure, the flow rate at the other nozzles changes, and in order to clean the nozzles the whole operation must be stopped and the apparatus must be disassembled.
To alleviate these disadvantages according to the invention there is provided a nozzle assembly for delivering concrete to be wetted with water (preferably a dry spray concrete) comprising means for regulating the flow of concrete through the assembly and means for regulating the amount of water sprayed into thi concrete passing through the assembly, characterized in that the means for regulating the amount of water sprayed comprises two cylindrical sleeve portions (3,6) abutting one another and positioned one behind the other along the cylindrical axis, whereby one of the cylindrical sleeve portions (3) is held fixed during the spraying operation and the other cylindrical sleeve portion (6) can be moved against resilient means (5 and 9) so that the facing surfaces of the two cylindrical sleeve portions are forced apart by the pressure of water from a source, leaving a gap through which water can be forced (so that the sleeves act as a nozzle) to spray the concrete mix.
Preferably an assembly according to the invention is such that the c 1 Case 154-0184 facing surfaces of the two cylindrical sleeves (3,6) are formed so as to allow a part of the emerging water to flow in the direction of flow of the concrete mixture.
Preferably an assembly according to the invention has a thirdcylindrical sleeve (7) which is fixed to a casing and in which the second cylindrical sleeve (6) is positioned for axial displacement therein.
Preferably an assembly according to the invention is such that the second and third cylindrical sleeves (6,7) are joined together by two springloaded ring discs (5,9) located towards opposite ends of the cylinder of the third cylinder sleeve (7).
Preferably an assembly according to the invention is such that the first cylinder sleeve (3) has a shoulder piece which is next to a spacer ring (2) fixed in a casing (1) and at the end opposite the second cylinder sleeve (6), the first cylinder sleeve (3) has a pressure surface (3b) under pressure of the water to be injected, so that the first cylinder sleeve (3) is forced onto the spacer ring (2) and that means are provided to release the pressure from pressure surface (3b) in order that the gap between the first cylinder sleeve (3) and the second cylinder sleeve (6) can be increased, (for example, so that the gap can be cleared).
Further according to the invention there is provided a process for the spraying of concrete with water, comprising causing the concrete to pass through an assembly according to the invention and spraying water in the assembly according to the invention onto this concrete; the amount of water being introduced into the cement being controlled by two cylinder sleeves (3,6) in the assembly.
Preferably in a process according to the invention the water being injected into the flowing concrete mixture moistens the whole profile of the mixture as a result of the displacement of the second cylinder sleeve (6).
Case 154-0184 one advantage of an assembly according to the invention is that the water that is used to set the concrete can be delivered to the concrete at a constant velocity, independent of the quantity of water, so that the depth of penetration of the water jet into the flow of concrete is independent of the quantity of water.
In this Specification the term water includes any aqueous solution in which admixtures (for example superplasticizers)-are present.
r An embodiment of the invention will be described with reference to the accompanying drawing.
The figure shows a longitudinal cross-section through a mixing spray nozzle assembly according to the invention.
Several hollow cylinders are located within a tube-like casing 1. A spacer ring 2 is fixed to a ring-shaped rib la located in the inner of the casing 1. At the surface abutting rib la, the spacer ring 2 has several recesses 2a which link an annular T-slot lb in the inner area of the casing 1 with an annulus 4, which is in turn limited by a bevel 3a at the end of a first cylinder sleeve 3, the spacer ring 2 and spring-loaded ring discs 5, which forms an elastic link between a second cylinder sleeve 6 and a third cylinder sleeve 7. This third cylinder sleeve 7 is clamped firmly between a hollow screw 8 and the spacer ring 2. It is linked via the two spring-loaded ring discs 5 and 9 to the second cylinder sleeve 6 such that the latter can slide towards screw socket 17 against the force of spring-loaded discs 5 and 9 and the elastic support 10 once the water pressure in the annulus 4 is great enough. This annulus 4 is fed by a pipe 12 which is equipped with a regulating valve 11, and is screwed into the connecting borehole ld in the casing 1, which has a thread lc and opens into the annular T-slot lb. As a result of the shift of the second cylinder sleeve 6 to the left, a gap forms between the facing surfaces of the Case 154-0184 first cylinder sleeve 3 and the second cylinder sleeve 6, the gap serving as a ring nozzle for the water to be injected, the outlet aperture of which enlarges as the pressure increases, and thus allows an approximately constant out-flow rate, i.e. one which is independent of the quantity flowing through. Thus, to change the quantity of water to be injected into the central pipe, the only regulating necessary is that of valve 11.
The two spring-loaded ring discs 5 and 9 and the elastic support 10 are positioned such that at least part of the water jet coming from the annular T-slot 1b penetrates into the centre of the concrete mixture.
If the spacing surfaces of the two hollow cylinder sleeves 3 and 6 run vertically to the axis of the tube, an even water jet is obtained. If however the frontal surfaces have a conical shape, a gap shaped as a conical slice is formed, and the water emerging is partly flowing in the direction of the mixture flow through or a component flowing countercurrent to the flow of the mixture.
As is evident from the drawing, the first cylinder sleeve 3 is held stationary during operation but can be positioned for sliding movement if desired. In the position illustrated in the drawing, the pressure pipe 12 for the water to be injected is linked to the annulus 15 by a pipe 13 which contains a shut-off valve 14 and is screwed into threads i.e. of the threaded connecting borehole lf, the annulus being defined by the casing 1, the first cylinder sleeve 3 and the hollow screw 16. As can be seen from the drawing, the ring surface 3b is considerably larger than the radial component of the conical surface 3a. The consequence of this is that if the annulus 15 is under pressure from the water to be injected, the first cylinder sleeve 3 is located in the position illustrated in the drawing, that is next to the spacer ring 2.
If the ring-shaped nozzle orifice between the cylinder sleeves 3 Case 154-0184 and 6 becomes blocked, the shut-off valve 14 is switched over so that the pressure of annulus 15 is released. Then, the pressure in the annulus 4 effects a shift of the first cylinder sleeve 3 in the direction of screw socket 18, thus effecting problem-free opening of the nozzle orifice, so that all impurities wedged therein can be flushed away. By closing the shut-off valve 14, the first cylinder sleeve 3 resumes its illustrated position and is again ready for use.
The tube-like easing 1 has an internal thread at each end. The one marked 1g serves as a connector to the concrete feed pipe, this connection also being made by the screw socket 18 illustrated in the drawing. The other, marked 1h, serves as a connector to the spray nozzle orifice, which may have any known form and can be directly screwed into the thread or can be secured to the screw socket 17.
Case 154-0184
Claims (7)
1. A nozzle assembly for delivering concrete to be wetted with water comprising means for regulating the flow of concrete through the assembly and means for regulating the amount of water sprayed into the concrete passing through the assembly, characterized in that the means for regulating the amount of water sprayed comprises two cylindrical sleeve portions (3,6) abutting one another and positioned one behind the other along the cylindrical axis, whereby one of the cylindrical sleeve portions (3 or 6) is held stationary during the spraying operation and the other cylindrical sleeve portion (6 or 3 respectively) can be moved against resilient means (5 and 9) so that the facing surfaces of the two cylindrical sleeve portions are forced apart by the pressure of water from a source, leaving a gap through which water can be forced (so that the sleeves act as a nozzle) to spray the concrete mix.
2. An assembly according to Claim 1 in which the facing surfaces of the two cylindrical sleeves (3,6) are formed so as to allow one component of the emerging water to flow in the direction of the flow of the concrete mixture.
3. An assembly according to Claim 1 or Claim 2 having a third cylinder sleeve (7) which is fixed and in which the second cylinder sleeve (6) is positioned for axial displacement therein.
4. An assembly according to any one of the preceding claims in which the second and third cylinder sleeves (6,7) are joined together Case 154-0184 by two spring-loaded ring discs (5,9) located towards opposite ends of the cylinder of the third cylinder sleeve 7.
5. A process for the spraying of concrete with water, comprising causing the concrete to flow through an assembly according to any one of the preceding claims and spraying water in the assembly onto the concrete, the amount of water being introduced into the cement being controlled by two cylinder sleeves (3,6) in the assembly.
6. An asselTbly substantially as herein described with reference to the Figure.
7. A process substantially as herein described with reference to the use of the assenbly of the Figure.
1 1 1 Published 1990 at The Patent Office. State House. 6671 HighBolborn. London WC1R4TP Further copies maybe obtained from The Patent Office Sales Branch. St Mary Crky. Orpington. Kent BR5 UX. Printeld by Multiplex techniques ltd. St Mary CraY. Kent. Con. l!S7
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH781/89A CH678552A5 (en) | 1989-03-02 | 1989-03-02 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9004272D0 GB9004272D0 (en) | 1990-04-18 |
| GB2229653A true GB2229653A (en) | 1990-10-03 |
| GB2229653B GB2229653B (en) | 1992-05-20 |
Family
ID=4195035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9004272A Expired - Lifetime GB2229653B (en) | 1989-03-02 | 1990-02-26 | Mixing spray nozzle assembly,especially for the dry spraying of concrete |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JP2854368B2 (en) |
| CH (1) | CH678552A5 (en) |
| DE (1) | DE4006091C2 (en) |
| ES (1) | ES2027470A6 (en) |
| FR (1) | FR2644711A1 (en) |
| GB (1) | GB2229653B (en) |
| IT (1) | IT1239602B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5375947A (en) * | 1992-01-23 | 1994-12-27 | Multi Construction Chemicals (Proprietary) Limited | Method of filling a borehole |
| WO1998013563A1 (en) * | 1996-09-24 | 1998-04-02 | Mbt Holding Ag | Spray nozzle |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9413836U1 (en) * | 1994-08-26 | 1995-07-13 | Rombold & Gfroehrer Gmbh & Co | Plant for spraying dry building materials |
| DE19514326C2 (en) * | 1995-04-18 | 1998-04-02 | Wolfgang Peltzer | Device for blowing in particulate insulating materials |
| WO2002053337A1 (en) * | 2000-12-18 | 2002-07-11 | Feda Alicehajic | Jet nozzle for spraying fast-drying concrete |
| DE102004034138B4 (en) | 2004-07-15 | 2008-04-03 | Ceramat, S. Coop., Asteasu | Gas-fired heating device |
| CN102383606B (en) * | 2011-11-24 | 2013-10-23 | 三一汽车制造有限公司 | Lubrication system of concrete machine and concrete machine |
| CN102383605B (en) * | 2011-11-24 | 2013-10-23 | 三一汽车制造有限公司 | Lubrication system of concrete machine and concrete machine |
| JP7025668B2 (en) * | 2020-04-10 | 2022-02-25 | 品川リフラクトリーズ株式会社 | Water addition mechanism |
| CN116660049B (en) * | 2023-07-28 | 2023-10-03 | 达州华冠砼业有限公司 | Concrete pipeline water pressure testing equipment and method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB777321A (en) * | 1952-05-07 | 1957-06-19 | Oliver Coughtrie | An improved device for intermixing pluralities of liquids including gas or pulverised solids |
| US2785014A (en) * | 1955-07-05 | 1957-03-12 | Air Placement Equipment Compan | Nozzle for air placement of cementitious materials |
| GB1360803A (en) * | 1972-04-21 | 1974-07-24 | Nat Res Dev | Fibrereinforced articles |
| US3881656A (en) * | 1974-02-15 | 1975-05-06 | Universal Oil Prod Co | Mixing apparatus |
| BE891413A (en) * | 1981-12-09 | 1982-06-09 | Swemac Sa | APPARATUS FOR DIFFUSING A GAS IN A LIQUID |
| DE3220880C2 (en) * | 1982-06-03 | 1986-03-13 | Pressbau GmbH, 4300 Essen | Method for mixing dry concrete mix and water during dry concrete spraying and mixing tube for dry concrete spraying |
| ZA866310B (en) * | 1985-09-11 | 1987-04-29 | Aliva Ag | Nozzle |
| EP0284830A3 (en) * | 1987-03-30 | 1989-07-05 | Aliva Aktiengesellschaft | Spraying and mixing nozzle assembly |
-
1989
- 1989-03-02 CH CH781/89A patent/CH678552A5/de not_active IP Right Cessation
-
1990
- 1990-02-26 GB GB9004272A patent/GB2229653B/en not_active Expired - Lifetime
- 1990-02-27 DE DE4006091A patent/DE4006091C2/en not_active Expired - Fee Related
- 1990-02-28 FR FR9002700A patent/FR2644711A1/en active Granted
- 1990-02-28 IT IT47684A patent/IT1239602B/en active IP Right Grant
- 1990-03-01 ES ES9000602A patent/ES2027470A6/en not_active Expired - Lifetime
- 1990-03-01 JP JP2047363A patent/JP2854368B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5375947A (en) * | 1992-01-23 | 1994-12-27 | Multi Construction Chemicals (Proprietary) Limited | Method of filling a borehole |
| AU663550B2 (en) * | 1992-01-23 | 1995-10-12 | Multi Construction Chemicals (Proprietary) Limited | A method of filling a borehole |
| WO1998013563A1 (en) * | 1996-09-24 | 1998-04-02 | Mbt Holding Ag | Spray nozzle |
| US6065685A (en) * | 1996-09-24 | 2000-05-23 | Mbt Holding Ag | Spray nozzle |
| CH691692A5 (en) * | 1996-09-24 | 2001-09-14 | Mbt Holding Ag | Spray nozzle mixing unit, in particular for the concrete dry spraying. |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4006091C2 (en) | 2001-09-13 |
| FR2644711A1 (en) | 1990-09-28 |
| JPH02282571A (en) | 1990-11-20 |
| ES2027470A6 (en) | 1992-06-01 |
| DE4006091A1 (en) | 1990-09-06 |
| GB2229653B (en) | 1992-05-20 |
| IT9047684A0 (en) | 1990-02-28 |
| CH678552A5 (en) | 1991-09-30 |
| IT1239602B (en) | 1993-11-11 |
| GB9004272D0 (en) | 1990-04-18 |
| IT9047684A1 (en) | 1990-09-03 |
| FR2644711B1 (en) | 1994-04-22 |
| JP2854368B2 (en) | 1999-02-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20040226 |