CA2238447A1 - Apparatus for loading a cement slurry - Google Patents
Apparatus for loading a cement slurry Download PDFInfo
- Publication number
- CA2238447A1 CA2238447A1 CA002238447A CA2238447A CA2238447A1 CA 2238447 A1 CA2238447 A1 CA 2238447A1 CA 002238447 A CA002238447 A CA 002238447A CA 2238447 A CA2238447 A CA 2238447A CA 2238447 A1 CA2238447 A1 CA 2238447A1
- Authority
- CA
- Canada
- Prior art keywords
- liquid
- cementitious material
- chamber
- chute
- loading
- 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.)
- Abandoned
Links
- 239000004568 cement Substances 0.000 title description 39
- 239000002002 slurry Substances 0.000 title description 19
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000007921 spray Substances 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 5
- 239000004567 concrete Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000000843 powder Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
- B28C5/4203—Details; Accessories
- B28C5/4234—Charge or discharge systems therefor
- B28C5/4237—Charging, e.g. hoppers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/565—Mixing liquids with solids by introducing liquids in solid material, e.g. to obtain slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
- B01F25/72—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles
- B01F25/721—Spray-mixers, e.g. for mixing intersecting sheets of material with nozzles for spraying a fluid on falling particles or on a liquid curtain
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/181—Preventing generation of dust or dirt; Sieves; Filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0404—Proportioning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
- B28C7/067—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of stationary hoppers, chambers or bins from which the material is fed gravitationally, e.g. having agitating means therein
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/12—Supplying or proportioning liquid ingredients
- B28C7/126—Supply means, e.g. nozzles
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
An apparatus for loading a stream of cementitious material and a liquid is disclosed. The apparatus includes a liquid-dispensing structure is positioned above an the inlet end of a longitudinal chamber. The inlet end receives the stream of cementitious material. The liquid-dispensing structure dispenses the liquid into the stream of cementitious material passing through the chamber, such that the liquid mixes with the cementitious material as the cementitious material travels to the outlet end for loading.
Description
CA 02238447 1998-05-2~
Title: APPARATUS FOR LOADING A CEMENT SLURRY
Assignee: Antcan Ltd. (an Ontario Corporation) Inventor(s): Kris E. Wallgren Markus E. Wallgren s BACKGROUND OF THE INVENTION
Field of the l~nfe.~liGIl This invention relates to an apparatus for loading a cement slurry. In particular, the invention relates to an apparatus for loading a mixture of a cementitious material and a 10 liquid ("slurry") onto concrete mixer trucks, or the like, to be mixed with the other dry components required for the making of concrete.
Description of the Prior Art Prior art dry-batch plants provide a simple and cheap system for loading of components required in concrete production. In such a dry-batch plant, the cement, stone and 15 sand components used for making concrete are usually weighed out individually in weigh hoppers. Once the proper quantities are measured, the components are loaded into the concrete truck. The normal practice is to hll up the mixer truck with the correct amount of water first, followed by the cement, sand and stone simultaneously. The components are then mixed together by a rotating drum on the mixer truck. The drum is typically equipped with mixing blades to stir the material mixture. This mixing takes place in the truck before it is driven to the end user for delivery of the concrete.
However, there are a number of problems associated with prior art dry-batch plants, which are listed below.
~ The water does not distribute evenly throughout the concrete, and hence the concrete quality is not uniform within a truck load.
CA 02238447 1998-0~-2~
~ Additional cement and water must be added into the truck to compensate for the cement that does not properly mix with the water.
~ Dry-batch loading is unsuitable for high strength concrete which requires low water/cement ratios, where an even distribution of water becomes particularly important.
5 ~ A significant amount of dust is generated as the mixer truck is loaded with a dry mixture of cement and aggregate (stone and sand). The cement is a very fine powder prone to dusting.
~ "Cement balling", or collection of the cement into dry lumps which do not wet properly, can occur during the mixing of the components in the drum of the vehicle.
Slurry mixer chambers which are added on to a dry-batch plant are also known in the prior art. Mechanical slurry mixers have been developed to mix just the water and the cement components into a slurry. These mixers may be impeller driven or alternatively utilize ribbon blenders. The slurry is then emptied into the truck simultaneously with the aggregate and the admixtures. The slurry mixer may also act as a second scale for water and cement and 15 requires a reservoir with the capacity to hold the slurry for one comp'~te batch (normally 9m3) for loading into a mixing drum of a vehicle. These mixers improve on many of the short-falls in a basic dry-batch plant. However, slurry mixers are expensive and utilize co",plicated machinery. Accordi,,yly~ these mixers are commonly used only in plants specializing in higher quality concrete.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an apparatus for loading a cement slurry which introduces the water into a stream of cementitious material before it is dispensed into the CA 02238447 1998-0~-2~
mixer truck (or the like). The slurry loading apparatus according to the present invention provides for a cost saving by eliminating the need for a slurry mixer and yet provides similar benefits to those obtained from the mixer. The present invention provides improved dust control and concrete quality while reducing the need for purchasi"g separate slurry mixing s systems and dust control equipment.
For convenience the specification will refer to cement but it will be understoodby those skilled in the art that such references are not intended to be limiting and include any type of ce",enlilious material suitable for making of concrete.
In the invention an apparatus for ioading a stream of cementitious material and 10 a liquid comprises a liquid-dispensing structure positioned proximate to the stream of cementitious material. The liquid-dispensi"g structure is adapted to dispense the liquid into the stream of cementitious material prior to loading.
Preferably the apparatus also includes an elongale member having an inlet end an outlet end and a longitudinal chamber therein. The chamber is in fluid communication with 15 the inlet end and outlet ends. The inlet end is adapted to receive the stream of cementitious material. The liquid-dispensing structure being positioned proximate to the member and is adapted to dispense the liquid into the chamber such that the liquid mixes with the cementitious material as the cementitious material travels through the chamber to the outlet end for loading.
Further features of the invention will be described or will become apparent in the course of the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be more clearly understood, the preferred embodiment thereof will now be described in detail by way of example, with reference to the accompanying drawings, in which:
5 FIGURE 1 is an elevation view of a concrete dry-batch plant incorporating the present invention;
FIGURE 2 is an elevation view of a preferred embodiment of the present invention;
FIGURE 3 is a bottom view of the mixing chamber and nozles of the preferred embodiment;
and 0 FIGURE 4 is an exploded view of the preferred embodiment.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Fig. 1 shows a cement dry-batch plant. A conventional cement silo 4 is supported by a support structure 20. A conventional weigh hopper 3 is positioned beneath the 15 cement silo to receive and dispense measured quantities of cement therefrom. The weigh hopper is also secured to the support structure. A conventional weigh hopper discharge valve 7 for dispensing the measured quantity of cement is in fluid communication with the bottom end of the weigh hopper.
Referring to Figs. 2-4, an elongate member, such as a pipe 10, defines a mixing 20 chamber 24 therein. The pipe is made from any suitable material, such as, for example, mild steel. Preferably, the pipe has an upper conical portion 26 and a lower cylindrical portion 28.
The upper end of the conical portion defines an inlet end 34 of the mixing chamber. The inlet end has a greater diameter than the diameter of the lower portion. The bottom end of the CA 02238447 1998-0~-2~
cylindrical portion 28 defines an outlet end 36.
Preferably, a spray manifold 8 having six nozles 9 is positioned above the inletend, although any suitable liquid dispensing means may be employed. The spray manifold 8 is positioned to accommodate the bottom of the cement weigh hopper 3 such that the spray manifold does not interfere with the operation of the cement weigh hopper discharge valve 7.
The spray manifold is secured to a chute 2 (described in detail below) by a bracket 40. The spray manifold is connected to a pressurized liquid supply (not shown) by a conventional conduit 30. A control valve 6 is positioned betwecn the spray manifold 8 and the conduit. The nozles are preferably spaced evenly around the circumference of the manifold and are lo configured to spray a liquid downwardly and across the mixing chamber. The nozles are preferably any conventional type which produce a narrow angle (15-20 degrees) spray profile and medium sized spray droplets (3000-5000 micrometers). The liquid dispensed by the nozles is preferably water, but can be a solution of any number of known chemicals used in the production of conci~le.
The pipe 10 defining the mixing chamber 24 is preferably nested within a chute 2and is supported lherer,om by two support members 42. The chute 2 has an intake opening 32 to receive a supply of aggregate from a conventional conveyor belt 1. An exit opening 38, having a smaller cross-sectional area than the intake opening, is defined in the bottom end of the chute.
As shown in Figs. 1-4, cement material from the cement silo 4 passes down into the weigh hopper 3. The weigh hopper 3 measures out the required quantity of cement depending on batch size and the particular properties of concrete required. A stream of cement powder is dispensed in a controlled fashion by the weigh hopper discharge valve 7 into the CA 02238447 1998-0~-2~
mixing chamber 24. The stream of cement powder enters the inlet end 34, with the conical shape of the upper portion 26 assisting in collecting the cement powder. As the cement powder passes through the mixing chamber 24 downwardly toward the outlet end 36, liquid is sprayed from the nozles 9 into the passing cement powder to create a water-cement slurry. Preferably, 5 the nozzles are directed downwardly into the mixing chamber 24 at an approximate angle of 15-20 degrees from the vertical, such that all the liquid sprays impinge on the cement stream in the same area, creating a turbulent zone for optimal mixing of the liquid and the cement. The flow rates for the liquid and the cement are conl,.l'ed using control valves 6 and 7 to maintain the desired proportion between the water and cement throughout the loading period. Preferably, lo the average flow rates for the cement and liquid should permit the loading 9m3 (required for one batch or truck load) of cohc,ete in approximately 1-2 minutes. The valves 6 and 7 may be operated by any conventional control means, such as, for example, a central batching computer control system (not shown).
Simultaneously with the discharge of the cement into the mixing chamber 24, all 15 of the other dry components of concrete, including sand and stone (aggregate), as well as other optional dry components, are discharged into the intake end 32 of the chute 2 by the conveyor belt 1. The aggregate material travels through the chute simultaneously with and isolated from the water-cement slurry, which travels through the mixing chamber 24. The flow of the aggregate material is controlled by the speed of the conveyor belt (which is also controlled by 20 the central batching computer control system) to ensure an even flow and desired proportion of aggregate throughout the truck loading period.
The cement-water slurry is directed into the mixer truck 5 by the bottom cylindrical portion 28 and exits the pipe 10 at the outlet end 36 of the mixing chamber 24. At CA 02238447 1998-0~-2~
the same time, the aggregate material is directed into the mixer truck 5 by the exit end 38 of the chute 2, thereby providing all of the components required for producing concrete.
The slurry is then mixed with the aggregate inside the rotating drum of the concrete mixer truck 5 as the concrete is being transported to the end user.
The concrete loading apparatus according to the present invention can be rel,uriLled easily into existing dry-batch plants with little or no modifications to the existing dry-batch plant equipment.
It will be appreciated that the above description relates to the preferred embodiment by way of example only. Many variations on the invention will be obvious to those o skilled in the art, and such obvious variations are within the scope of the invention as described and claimed, whether or not expressly described.
Title: APPARATUS FOR LOADING A CEMENT SLURRY
Assignee: Antcan Ltd. (an Ontario Corporation) Inventor(s): Kris E. Wallgren Markus E. Wallgren s BACKGROUND OF THE INVENTION
Field of the l~nfe.~liGIl This invention relates to an apparatus for loading a cement slurry. In particular, the invention relates to an apparatus for loading a mixture of a cementitious material and a 10 liquid ("slurry") onto concrete mixer trucks, or the like, to be mixed with the other dry components required for the making of concrete.
Description of the Prior Art Prior art dry-batch plants provide a simple and cheap system for loading of components required in concrete production. In such a dry-batch plant, the cement, stone and 15 sand components used for making concrete are usually weighed out individually in weigh hoppers. Once the proper quantities are measured, the components are loaded into the concrete truck. The normal practice is to hll up the mixer truck with the correct amount of water first, followed by the cement, sand and stone simultaneously. The components are then mixed together by a rotating drum on the mixer truck. The drum is typically equipped with mixing blades to stir the material mixture. This mixing takes place in the truck before it is driven to the end user for delivery of the concrete.
However, there are a number of problems associated with prior art dry-batch plants, which are listed below.
~ The water does not distribute evenly throughout the concrete, and hence the concrete quality is not uniform within a truck load.
CA 02238447 1998-0~-2~
~ Additional cement and water must be added into the truck to compensate for the cement that does not properly mix with the water.
~ Dry-batch loading is unsuitable for high strength concrete which requires low water/cement ratios, where an even distribution of water becomes particularly important.
5 ~ A significant amount of dust is generated as the mixer truck is loaded with a dry mixture of cement and aggregate (stone and sand). The cement is a very fine powder prone to dusting.
~ "Cement balling", or collection of the cement into dry lumps which do not wet properly, can occur during the mixing of the components in the drum of the vehicle.
Slurry mixer chambers which are added on to a dry-batch plant are also known in the prior art. Mechanical slurry mixers have been developed to mix just the water and the cement components into a slurry. These mixers may be impeller driven or alternatively utilize ribbon blenders. The slurry is then emptied into the truck simultaneously with the aggregate and the admixtures. The slurry mixer may also act as a second scale for water and cement and 15 requires a reservoir with the capacity to hold the slurry for one comp'~te batch (normally 9m3) for loading into a mixing drum of a vehicle. These mixers improve on many of the short-falls in a basic dry-batch plant. However, slurry mixers are expensive and utilize co",plicated machinery. Accordi,,yly~ these mixers are commonly used only in plants specializing in higher quality concrete.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an apparatus for loading a cement slurry which introduces the water into a stream of cementitious material before it is dispensed into the CA 02238447 1998-0~-2~
mixer truck (or the like). The slurry loading apparatus according to the present invention provides for a cost saving by eliminating the need for a slurry mixer and yet provides similar benefits to those obtained from the mixer. The present invention provides improved dust control and concrete quality while reducing the need for purchasi"g separate slurry mixing s systems and dust control equipment.
For convenience the specification will refer to cement but it will be understoodby those skilled in the art that such references are not intended to be limiting and include any type of ce",enlilious material suitable for making of concrete.
In the invention an apparatus for ioading a stream of cementitious material and 10 a liquid comprises a liquid-dispensing structure positioned proximate to the stream of cementitious material. The liquid-dispensi"g structure is adapted to dispense the liquid into the stream of cementitious material prior to loading.
Preferably the apparatus also includes an elongale member having an inlet end an outlet end and a longitudinal chamber therein. The chamber is in fluid communication with 15 the inlet end and outlet ends. The inlet end is adapted to receive the stream of cementitious material. The liquid-dispensing structure being positioned proximate to the member and is adapted to dispense the liquid into the chamber such that the liquid mixes with the cementitious material as the cementitious material travels through the chamber to the outlet end for loading.
Further features of the invention will be described or will become apparent in the course of the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be more clearly understood, the preferred embodiment thereof will now be described in detail by way of example, with reference to the accompanying drawings, in which:
5 FIGURE 1 is an elevation view of a concrete dry-batch plant incorporating the present invention;
FIGURE 2 is an elevation view of a preferred embodiment of the present invention;
FIGURE 3 is a bottom view of the mixing chamber and nozles of the preferred embodiment;
and 0 FIGURE 4 is an exploded view of the preferred embodiment.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Fig. 1 shows a cement dry-batch plant. A conventional cement silo 4 is supported by a support structure 20. A conventional weigh hopper 3 is positioned beneath the 15 cement silo to receive and dispense measured quantities of cement therefrom. The weigh hopper is also secured to the support structure. A conventional weigh hopper discharge valve 7 for dispensing the measured quantity of cement is in fluid communication with the bottom end of the weigh hopper.
Referring to Figs. 2-4, an elongate member, such as a pipe 10, defines a mixing 20 chamber 24 therein. The pipe is made from any suitable material, such as, for example, mild steel. Preferably, the pipe has an upper conical portion 26 and a lower cylindrical portion 28.
The upper end of the conical portion defines an inlet end 34 of the mixing chamber. The inlet end has a greater diameter than the diameter of the lower portion. The bottom end of the CA 02238447 1998-0~-2~
cylindrical portion 28 defines an outlet end 36.
Preferably, a spray manifold 8 having six nozles 9 is positioned above the inletend, although any suitable liquid dispensing means may be employed. The spray manifold 8 is positioned to accommodate the bottom of the cement weigh hopper 3 such that the spray manifold does not interfere with the operation of the cement weigh hopper discharge valve 7.
The spray manifold is secured to a chute 2 (described in detail below) by a bracket 40. The spray manifold is connected to a pressurized liquid supply (not shown) by a conventional conduit 30. A control valve 6 is positioned betwecn the spray manifold 8 and the conduit. The nozles are preferably spaced evenly around the circumference of the manifold and are lo configured to spray a liquid downwardly and across the mixing chamber. The nozles are preferably any conventional type which produce a narrow angle (15-20 degrees) spray profile and medium sized spray droplets (3000-5000 micrometers). The liquid dispensed by the nozles is preferably water, but can be a solution of any number of known chemicals used in the production of conci~le.
The pipe 10 defining the mixing chamber 24 is preferably nested within a chute 2and is supported lherer,om by two support members 42. The chute 2 has an intake opening 32 to receive a supply of aggregate from a conventional conveyor belt 1. An exit opening 38, having a smaller cross-sectional area than the intake opening, is defined in the bottom end of the chute.
As shown in Figs. 1-4, cement material from the cement silo 4 passes down into the weigh hopper 3. The weigh hopper 3 measures out the required quantity of cement depending on batch size and the particular properties of concrete required. A stream of cement powder is dispensed in a controlled fashion by the weigh hopper discharge valve 7 into the CA 02238447 1998-0~-2~
mixing chamber 24. The stream of cement powder enters the inlet end 34, with the conical shape of the upper portion 26 assisting in collecting the cement powder. As the cement powder passes through the mixing chamber 24 downwardly toward the outlet end 36, liquid is sprayed from the nozles 9 into the passing cement powder to create a water-cement slurry. Preferably, 5 the nozzles are directed downwardly into the mixing chamber 24 at an approximate angle of 15-20 degrees from the vertical, such that all the liquid sprays impinge on the cement stream in the same area, creating a turbulent zone for optimal mixing of the liquid and the cement. The flow rates for the liquid and the cement are conl,.l'ed using control valves 6 and 7 to maintain the desired proportion between the water and cement throughout the loading period. Preferably, lo the average flow rates for the cement and liquid should permit the loading 9m3 (required for one batch or truck load) of cohc,ete in approximately 1-2 minutes. The valves 6 and 7 may be operated by any conventional control means, such as, for example, a central batching computer control system (not shown).
Simultaneously with the discharge of the cement into the mixing chamber 24, all 15 of the other dry components of concrete, including sand and stone (aggregate), as well as other optional dry components, are discharged into the intake end 32 of the chute 2 by the conveyor belt 1. The aggregate material travels through the chute simultaneously with and isolated from the water-cement slurry, which travels through the mixing chamber 24. The flow of the aggregate material is controlled by the speed of the conveyor belt (which is also controlled by 20 the central batching computer control system) to ensure an even flow and desired proportion of aggregate throughout the truck loading period.
The cement-water slurry is directed into the mixer truck 5 by the bottom cylindrical portion 28 and exits the pipe 10 at the outlet end 36 of the mixing chamber 24. At CA 02238447 1998-0~-2~
the same time, the aggregate material is directed into the mixer truck 5 by the exit end 38 of the chute 2, thereby providing all of the components required for producing concrete.
The slurry is then mixed with the aggregate inside the rotating drum of the concrete mixer truck 5 as the concrete is being transported to the end user.
The concrete loading apparatus according to the present invention can be rel,uriLled easily into existing dry-batch plants with little or no modifications to the existing dry-batch plant equipment.
It will be appreciated that the above description relates to the preferred embodiment by way of example only. Many variations on the invention will be obvious to those o skilled in the art, and such obvious variations are within the scope of the invention as described and claimed, whether or not expressly described.
Claims (16)
1. An apparatus for loading a stream of cementitious material and a liquid, said apparatus comprising a liquid-dispensing structure positioned proximate to said stream of cementitious material, said liquid-dispensing structure adapted to dispense said liquid into said stream of cementitious material prior to loading.
2. The apparatus of claim 1 further comprising an elongate member having an inlet end and an outlet end, said member defining a longitudinal chamber therein, said chamber being in fluid communication with said inlet end and said outlet end, said inlet end adapted to receive said stream of cementitious material, said liquid-dispensing structure being positioned proximate to said member, said liquid-dispensing structure adapted to dispense said liquid into said chamber, such that said liquid mixes with said cementitious material as said cementitious material travels through said chamber to said outlet end for loading.
3. The apparatus of claim 2 further comprising a chute having an intake end and an exit end, said intake end adapted to receive an aggregate material, said chute adapted for passage of said aggregate material therethrough from said intake end to said exit end for loading, said exit end of said chute being located proximate to said outlet end of said member.
4. The apparatus of claim 3, wherein said inlet end is above said outlet end and said intake end is above said exit end, such that said cementitious material travels through said chamber and said aggregate material travels through said chute by gravitational force.
5. The apparatus of claim 4, wherein said liquid dispensing structure comprises:
(a) a spray manifold positioned above said inlet end; and (b) a plurality of liquid dispensing nozzles positioned on said spray manifold and in fluid communication therewith, said nozzles adapted to spray said liquid into said mixing chamber to facilitate the mixing of said cementitious material and said liquid.
(a) a spray manifold positioned above said inlet end; and (b) a plurality of liquid dispensing nozzles positioned on said spray manifold and in fluid communication therewith, said nozzles adapted to spray said liquid into said mixing chamber to facilitate the mixing of said cementitious material and said liquid.
6. The apparatus of claim 5, wherein said liquid dispensing nozzles are spaced equidistantly along said spray manifold.
7. The apparatus of claim 6, wherein said chamber comprises an upper portion and a lower portion, said upper portion having a hollow conical shape and said lower portion having a hollow cylindrical shape, said inlet end having a diameter greater than said outlet end.
8. The apparatus claim 7, wherein said elongate member is nested within said chute such that intake end of said chute is below said inlet end of said chamber.
9. A loading apparatus as defined in claim 8, wherein said spray manifold has a circular shape and said plurality of liquid dispensing nozzles is six liquid dispensing nozzles, said nozzles adapted to direct said liquid to contact said cementitious material at a predetermined point in said mixing chamber to create a turbulent flow zone, thereby optimizing the mixing of said cementitious material and said liquid.
10. The apparatus of claim 2, wherein said liquid dispensing structure comprises:
(a) a spray manifold positioned above said inlet end; and (b) a plurality of liquid dispensing nozzles positioned on said spray manifold and in fluid communication therewith, said nozzles adapted to spray said liquid into said mixing chamber to facilitate the mixing of said cementitious material and said liquid.
(a) a spray manifold positioned above said inlet end; and (b) a plurality of liquid dispensing nozzles positioned on said spray manifold and in fluid communication therewith, said nozzles adapted to spray said liquid into said mixing chamber to facilitate the mixing of said cementitious material and said liquid.
11. The apparatus of claim 10, wherein said liquid dispensing nozzles are spaced equidistantly along said spray manifold.
12. The apparatus of claim 11, wherein said chamber comprises an upper portion and a lower portion, said upper portion having a hollow conical shape and said lower portion having a hollow cylindrical shape, said inlet end having a diameter greater than said outlet end.
13. The apparatus of claim 11 further comprising a chute having an intake end and an exit end, said intake end adapted to receive an aggregate material, said chute adapted for passage of said aggregate material therethrough from said intake end to said exit end for loading, said exit end of said chute being located proximate to said outlet end of said member.
14. The apparatus of claim 13, wherein said inlet end is above said outlet end and said intake end is above said exit end, such that said cementitious material travels through said chamber and said aggregate material travels through said chute by gravitational force.
15. The apparatus claim 13, wherein said elongate member is nested within said chute such that intake end of said chute is below said inlet end of said chamber.
16. A loading apparatus as defined in claim 15, wherein said spray manifold has a circular shape and said plurality of liquid dispensing nozzles is six liquid dispensing nozzles, said nozzles adapted to direct said liquid to contact said cementitious material at a predetermined point in said mixing chamber to create a turbulent flow zone, thereby optimizing the mixing of said cementitious material and said liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002238447A CA2238447A1 (en) | 1997-05-26 | 1998-05-25 | Apparatus for loading a cement slurry |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002206117A CA2206117A1 (en) | 1997-05-26 | 1997-05-26 | Dust control and concrete mixing apparatus |
| CACA2,206,117 | 1997-05-26 | ||
| CA002238447A CA2238447A1 (en) | 1997-05-26 | 1998-05-25 | Apparatus for loading a cement slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2238447A1 true CA2238447A1 (en) | 1998-11-26 |
Family
ID=25679373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002238447A Abandoned CA2238447A1 (en) | 1997-05-26 | 1998-05-25 | Apparatus for loading a cement slurry |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2238447A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003024579A1 (en) * | 2001-08-30 | 2003-03-27 | Anton Lindner | Spray box |
| FR2949090A1 (en) * | 2009-08-14 | 2011-02-18 | Gpac | Building machine e.g. crusher, for use during preparation of concrete or mortar, has dust protection device transversing along product introduction direction to catch dust and to drive dust towards bottom part of container |
| CN109227944A (en) * | 2018-09-24 | 2019-01-18 | 安徽秋华建筑工程有限公司 | A kind of cylinder type is convenient for the inorganic heat insulation mortar mixing arrangement of discharging |
| CN116330484A (en) * | 2023-04-17 | 2023-06-27 | 武安市保事达水泥制造有限公司 | Batching equipment for blast furnace slag silicate cement |
-
1998
- 1998-05-25 CA CA002238447A patent/CA2238447A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003024579A1 (en) * | 2001-08-30 | 2003-03-27 | Anton Lindner | Spray box |
| FR2949090A1 (en) * | 2009-08-14 | 2011-02-18 | Gpac | Building machine e.g. crusher, for use during preparation of concrete or mortar, has dust protection device transversing along product introduction direction to catch dust and to drive dust towards bottom part of container |
| CN109227944A (en) * | 2018-09-24 | 2019-01-18 | 安徽秋华建筑工程有限公司 | A kind of cylinder type is convenient for the inorganic heat insulation mortar mixing arrangement of discharging |
| CN116330484A (en) * | 2023-04-17 | 2023-06-27 | 武安市保事达水泥制造有限公司 | Batching equipment for blast furnace slag silicate cement |
| CN116330484B (en) * | 2023-04-17 | 2023-10-13 | 武安市保事达水泥制造有限公司 | Batching equipment for blast furnace slag silicate cement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |