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WO2024176246A1 - Mélangeur de béton mobile présentant une configuration de stockage de matériau et de flux de matériau prise en sandwich - Google Patents

Mélangeur de béton mobile présentant une configuration de stockage de matériau et de flux de matériau prise en sandwich Download PDF

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Publication number
WO2024176246A1
WO2024176246A1 PCT/IN2024/050150 IN2024050150W WO2024176246A1 WO 2024176246 A1 WO2024176246 A1 WO 2024176246A1 IN 2024050150 W IN2024050150 W IN 2024050150W WO 2024176246 A1 WO2024176246 A1 WO 2024176246A1
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WO
WIPO (PCT)
Prior art keywords
mixer
fine
binder
sandwiched
conveyors
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.)
Pending
Application number
PCT/IN2024/050150
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English (en)
Inventor
Amit Arun Gokhale
Anand Arun Gokhale
Antara Amit Gokhale
Arjun Anand Gokhale
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Individual
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Individual
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 Individual filed Critical Individual
Publication of WO2024176246A1 publication Critical patent/WO2024176246A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C9/00—General arrangement or layout of plant
    • B28C9/04—General arrangement or layout of plant the plant being mobile, e.g. mounted on a carriage or a set of carriages
    • B28C9/0454—Self-contained units, i.e. mobile plants having storage containers for the ingredients

Definitions

  • TITLE Mobile concrete mixer having a sandwiched material storage and material flow configuration
  • the present invention relates to a concrete production & transportation Equipment installed on a heavy duty transport vehicle.
  • the above-said invention specifically relates to a Vehicle mounted Concrete production & transportation equipment having separate dry material compartments for cement, fine aggregates coarse aggregates and water wherein an on-board batch type mixer for producing fresh concrete apart from having a variety of batching systems, variety of drive systems and a variety of batch mixers having a controllable discharge gate.
  • this specific invention is related to an optimized mechanical construction and flow configuration of various materials in the vehicle mounted concrete mixer resulting in a new set of techno - commercial benefits along-with simplicity of design which are not available with the prior arts.
  • the invention disclosed by our granted Indian patent No. 287080 is a “Weight Based Concrete Production & Transportation Vehicle” which is operated by electric or hydraulic power generated by the PTO of the Vehicle on which it is installed.
  • volumetric concrete mixers having continuous auger mixers in Europe and USA which are not considered as a related prior art in context of this invention because these equipment are provided with ‘continuous auger mixers having an open ended discharge’ and ‘manual material setting arrangements for coarse and fine aggregates’ which cannot guarantee high quality homogeneous concrete without human intervention and hence are not accepted in Indian market.
  • the present invention essentially discloses an equipment having a human intervention free operation and a batch type mixer having a controllable discharge gate.
  • the prior arts as disclosed above mainly focus on the drive systems and batching systems which are used to produce concrete especially in a mobile application. Further the said prior arts disclose multiple compartments for multiple solid materials such as but not limited to cement, fly ash or GGBS, 10 mm coarse aggregates, 20 mm coarse aggregates, river sand, crush sand and additive materials along-with a variety of batch type mixers.
  • multiple solid materials such as but not limited to cement, fly ash or GGBS, 10 mm coarse aggregates, 20 mm coarse aggregates, river sand, crush sand and additive materials along-with a variety of batch type mixers.
  • each component of a truckmounted mobile concrete plant must be suitably configured to work supplementary and complimentary to each other so as to have optimum utilization of space available on truck, high productivity, improved mixing quality and high discharge height.
  • All of these technocommercial advantages can be achieved by having an improved material flow configuration in which the critical components of the equipment such as bulk storage, conveyors, waiting hoppers and even the Mixer collectively ensure a particular material flow.
  • the present invention therefore discloses a new and highly effective, improved material flow system configuration which results in a simple design, so as to have many new techno-commercial benefits over the prior arts which are not available as on date.
  • the material flow in a mobile concrete mixer is very important and critical as it not only determines the simple and smooth handling of all the materials but also determines a very high productivity and ultra-short batch cycle times. This is very important and critical in terms of Truckmounted Mobile Concrete Mixers because of the following very important and critical reasons. a. Very limited space on the Truck:
  • the mobile concrete mixers installed on automotive truck or vehicle with the purpose of production and transportation has a very limited available space for equipment and materials. Therefor the material arrangement becomes very critical while utilizing the available space for optimum output rate.
  • the basic objective is to have an improved material storage which can assist the rate of producing concrete per hour. b. Loading height Limitation and volume storage limitation of solid as well as liquid ingredients.
  • the production rate depends on the cycle time to produce one single batch of concrete which involves a batching process and a mixing process. As per our experience, unless and until the materials and their respective conveyors are optimized, high production rates and simplicity of construction are impossible to achieve. e. A supplementary and complementary Mixer design in terms of material movement and dead lock relief.
  • the concrete mixer plays a critical role in mixing the materials with water to produce high quality homogeneous concrete in a very short time.
  • the Mixer is the ultimate point where the material flows converge and hence should have a supplementary and complementary design so as to supplement and complement the material storage and the material flows through respective material conveyors. f. Better mixing in a short mixing time as a result of improved material flow.
  • the material storage system, the individual material conveyors and the mixer all should follow a particular pattern of material flow in order to have better mixing in a short mixing time. g. Comparatively very low power requirement and low connected load due to improved material flow system.
  • An optimized material storage and material flow configuration before and inside the mixer is critical to reduce the power requirement and the net connected load. This is achieved by using the available space to maximum advantage and having a material storage system complimentary and supplementary to the material flow inside the mixer. h. Use of small prime mover due to improved material flow system resulting in very high fuel economy.
  • a high concrete discharge height from the mixer is very important when the Mobile Mixer is used to produce and transport concrete as it can feed a concrete pump placed below the mixer discharge as well as place the concrete for a down pour by means of a chute comparable to a conventional transit concrete mixer. This is very important and critical for a truck-mounted mobile batching plant to be used as a practical mean to produce as well as transport. Therefore having a high concrete discharge height is a critical object of the present invention.
  • Mobile concrete mixer having a sandwiched material storage and material flow configuration consisting of- a.
  • a mobile Concrete Mixer installed on a vehicle has many components. These components include the drive system of the mixer, the operating system of the Mixer, the batching system based on which the ingredients of concrete are batched or proportioned, the material storage system, material conveying system and mixing system.
  • the present invention focus on the material storage and material flow configuration and the mechanical construction of the mobile mixer, irrespective of the drive system of the mixer which includes such as but not limited to the drive taken from power take off of the vehicle engine by electric or hydraulic means, a dedicated slave engine, a lithium ion rechargeable battery, an aluminum ion battery, etc.
  • the present invention is irrespective of the drive system used to operate the said mixer but mainly focuses on the physical construction and material flow configuration of the ingredients of concrete before and during mixing.
  • the Mobile concrete Mixer as disclosed by the present application can be operated by any of the drive systems as mentioned above.
  • the Mobile Concrete Mixer operating system consists of a PLC (programmable Logic Control) based panel which carries out the operation of batching and mixing of the ingredients in a human intervention free manner based upon the mix design required.
  • PLC programmable Logic Control
  • the said operating panel is thus programmed by considering this optimized mechanical storage and the method of batching.
  • the machine is provided with a VWT batching or batching or proportioning based upon Volume, weight and time
  • the said operating system is programmed accordingly to work with the above disclosed optimized material storage design and material flow configuration.
  • all the three conveyors (6,7 & 8) are calibrated separately and each conveyor has a fixed flow rate at a fixed rpm and the operating system is thus programmed to operate the conveyors (6,7 & 8) simultaneously along with water and cut off each of the conveyors (6,7 & 8) separately after the preset material is discharged in mixer (9) and the discharge gate (14) is opened by the system after the mixing time is over.
  • the mixer (9) is kept on the load-cells and each materials can be added one by one on cumulative basis by the system into the mixer (9).
  • an optional batch waiting hopper (12) can be installed between the operative ends of the conveyors (6, 7 & 8) and the said hopper (12) is kept on load -cells so as to weigh all the materials coming from conveyors (6,7 & 8) and the said hopper (12) is provided a small belt (13) at its bottom to discharge the weighed materials into the Mixer (9). While the basic atomized construction of material storage and the Mixer (9) remains the same.
  • the weigh hopper (12) is alternatively provided a discharge gate (13) to discharge the weighed materials into the Mixer (9).
  • the mixer (9) is located symmetrically at the rear of the vehicle (v) just below the discharge ends of the conveyors (6,7 & 8).
  • the most preferred embodiment as disclosed by the present application discloses a simple design single shaft mixer (9), having a centrally located shaft (10) and a semicircular bottom wherein the shaft (10) is provided with mixing blades (11).
  • the Mixer is divided in two parts by the longitudinal axis of the vehicle (V) side A and Side B. While the cement or binder is discharged at the center of the mixer with water (not shown), the fine material and coarse materials are discharged on side A and Side B respectively. In other words, cement is discharged at center of the mixer with water and fine and coarse materials are discharged at opposite sides of each other.
  • the mixing blades (11) in side A and Side B are mirror images of each other and in one unidirectional rotation, both blades of side A as well side B push the solid materials towards the center.
  • a discharge gate (14) is provided which is at the bottom center of the mixer which allows discharge of concrete after mixing time is over.
  • While the most preferred embodiment as disclosed by the present application discloses a simple single shaft Mixer having L.H. and R.H. blades to specifically assist the material flow to give optimum desired result in terms concrete quality and output.
  • a no. of embodiments are also possible by using a variety of mixer types with the sandwich type material storage as disclosed above such as but not limited to a twin or multi-shaft mixer having similar mechanical construction, a mixer having unidirectional blades or paddles with a forward & reverse, a horizontal mixer such as a PAN type Mixer, a reversible drum mixer, etc.
  • Such embodiments are covered by the present application and therefore do not limit the scope of the invention as disclosed.
  • the fig No. 1 on sheet No. 1 discloses the top view of the most preferred embodiment of the present invention.
  • the fig No. 3 on sheet No. 3 discloses a side view of the most preferred embodiment of the present invention.
  • the fig. No. 6 on sheet No. 6 discloses a side view of the embodiment of the present invention with an optional intermediate weighing or waiting hopper (12).
  • a mobile Concrete Mixer (1) is installed on a Vehicle (V).
  • V Vehicle
  • the top view discloses a unique construction of the composite material storage (2) which has three longitudinal compartments along the length of the said storage (2).
  • a Binder or cement or cementitious material compartment No. 3 is sandwiched longitudinally between two aggregate compartments namely the fine material compartment (4) and a coarse material compartment (5).
  • the fine material used is crushed or machined sand or river sand or a mixture of both.
  • the coarse aggregates can be crushed stones or gravel of various sizes.
  • the standard coarse aggregates used are 10 mm or 20 mm size or a pre-mix of both.
  • Concrete is a construction material which is produced by mixing a binder such as cement with the fine and coarse aggregates with water.
  • a binder such as cement
  • chemical additives are added in specific doses.
  • the present invention is basically related to the sandwich type storage and material flow of solid materials of concrete, only the optimized material storage and material flow configuration before and during mixing is disclosed for the sake of clarity and conciseness.
  • vehicle V and the Concrete Mixer (1) share the same longitudinal axis.
  • the binder compartment (3) is thus longitudinally sandwiched between compartments (4 and 5) which are meant for fine and coarse aggregates respectively.
  • All the three materials are made to move in the same direction, i.e. towards the rear of the vehicle by having separate conveyors for each materials.
  • the screw conveyor (6) is at the bottom of the cement or binder compartment (3) which conveys the cement or binder to the rear of the vehicle.
  • a cleated belt conveyor (7) is used to convey the fine aggregates to the rear of the vehicle and is operatively below the fine material compartment (4).
  • Another cleated belt Conveyor (8) is used to convey the said coarse aggregates to the rear of the vehicle.
  • All the three conveyors (6, 7 & 8) as shown in the fig. are inclined at an angle so as to have a high discharge height on-board the vehicle.
  • all three basic solid materials required for making concrete are made available at a high discharge height and a in a small space. This enables their entry into a compulsory mixer (9) in the most ideal way as these materials are discharged by gravity into the said mixer (9).
  • a required size water tank (15) is also accommodated below the said inclined conveyors.
  • the longitudinal axis of the vehicle divides the Mixer (9) in two parts Side A and Side B as shown in the Fig.
  • the cement or basic binder material is discharged exactly at the center of the mixer (9) while the fine aggregates and the coarse aggregates are discharged on the Side A and Side B of the Mixer (9).
  • cement is discharged at the center and fine and coarse materials opposite to each other.
  • a water pipe (not shown) also ensures that water and chemical additives are also added at the center of the Mixer (9).
  • the most preferred embodiment as shown in the fig No. 1 on the sheet No. 1, discloses a single shaft Simple Concrete Mixer having a single shaft (10) having a gear transmission on one side and a bearing on another side.
  • the said single shaft (10) is provided with a plurality of Mixing blades (11) and a unidirectional direction of rotation.
  • the Mixing blades in Side A are positioned exactly opposite to the Mixing blades in the Side B.
  • Side B is provided with Right hand blades or vice a versa.
  • a unidirectional rotation which insures the movement of material from Side A to Side B and at the same time movement of material from Side B to Side A, is employed.
  • the blades on side A and blades on side B ensure the flow of materials towards the center of the mixer.
  • a discharge gate (14) is provided at the center of the operative circular bottom of the said Mixer (9).
  • the shaft (10) is provided with a high Torque and high speed resulting in transfer of material from side A to side B and vice a versa in a short span of time due to the gaps between the blades (11).
  • the deliberate gaps avoid any deadlock.
  • blades (11) cover the complete span of mixer for 100% discharge. As soon as the gate (14) is opened the mixed concrete is discharged through the said discharge gate.
  • Another techno-commercial advantage of the present invention is that the higher discharge height ensured by the sandwiched material storage as shown, makes the equipment compatible with all batching systems, namely weight based or volume based or flow rate based or VWT (Volume, weight, Time) based. Further since the all three materials are having separate conveyors, the material discharged per revolution can be calculated by having a rpm sensor at the final drive of each conveyor and the material can be batched on the revolution method as well.
  • VWT Volume, weight, Time
  • Binder or Cement compartment (3) at the center is provided with a top cover which is not shown in the said fig. for clarity.
  • the cover ensures that aggregates do not enter cement compartment.
  • the cement bin height also can be more by a few inches than the aggregate bins so as to ensure complete separation of fine and coarse materials and more storage of cement.
  • a rain cover is provided for the open top during transport.
  • the conveyors (7 & 8) are alternatively adapted to have adjustable material gates so as to use the equipment with the continuous mixer.
  • the said adjustable gates can be used to regulate the volume flow precisely.

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  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

L'invention concerne un mélangeur de béton mobile ayant une configuration de stockage de matériau et de flux de matériau prise en sandwich, qui est caractérisé par - un mélangeur de béton mobile (1) installé sur un véhicule (v) comportant un compartiment de stockage de matériau solide en vrac composite (2), le compartiment de ciment ou de liant (3) étant pris en sandwich longitudinalement entre les compartiments d'agrégat fin et grossier (4 et 5) présentant des transporteurs inclinés (6, 7 et 8) respectivement, le mélangeur (9) étant divisé en deux côtés (A et B) par l'axe longitudinal du véhicule et le liant ou le ciment étant évacué dans le mélangeur au centre avec de l'eau tandis que les matériaux fins et grossiers sont sur des côtés opposés du mélangeur (9). Le mélange est obtenu au moyen d'une pluralité de lames de mélange (11) qui poussent le matériau du « côté A » vers le « côté B » et vice versa avant de décharger le béton mélangé frais par une porte de décharge centrale (14).
PCT/IN2024/050150 2023-12-23 2024-02-15 Mélangeur de béton mobile présentant une configuration de stockage de matériau et de flux de matériau prise en sandwich Pending WO2024176246A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202321088529 2023-12-23
IN202321088529 2023-12-23

Publications (1)

Publication Number Publication Date
WO2024176246A1 true WO2024176246A1 (fr) 2024-08-29

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Application Number Title Priority Date Filing Date
PCT/IN2024/050150 Pending WO2024176246A1 (fr) 2023-12-23 2024-02-15 Mélangeur de béton mobile présentant une configuration de stockage de matériau et de flux de matériau prise en sandwich

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6145066A (ja) * 1984-08-08 1986-03-04 新明和工業株式会社 コンクリ−ト素材の運搬および混練用車両
WO2011007364A2 (fr) * 2009-07-14 2011-01-20 Amit Arun Gokhale Équipement de production et de transport de béton compact

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6145066A (ja) * 1984-08-08 1986-03-04 新明和工業株式会社 コンクリ−ト素材の運搬および混練用車両
WO2011007364A2 (fr) * 2009-07-14 2011-01-20 Amit Arun Gokhale Équipement de production et de transport de béton compact

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