EP0095977B1 - Fahrbare Betonzentrale mit einer Vorrichtung zur Entnahme von Zement - Google Patents

Fahrbare Betonzentrale mit einer Vorrichtung zur Entnahme von Zement Download PDF

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Publication number
EP0095977B1
EP0095977B1 EP83401057A EP83401057A EP0095977B1 EP 0095977 B1 EP0095977 B1 EP 0095977B1 EP 83401057 A EP83401057 A EP 83401057A EP 83401057 A EP83401057 A EP 83401057A EP 0095977 B1 EP0095977 B1 EP 0095977B1
Authority
EP
European Patent Office
Prior art keywords
screw
silo
concrete plant
mobile concrete
extracting
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.)
Expired
Application number
EP83401057A
Other languages
English (en)
French (fr)
Other versions
EP0095977A2 (de
EP0095977A3 (en
Inventor
Freddy Demy
André Dartus
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.)
Burton Steel Sarl
Original Assignee
Burton Steel Sarl
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 Burton Steel Sarl filed Critical Burton Steel Sarl
Priority to AT83401057T priority Critical patent/ATE39078T1/de
Publication of EP0095977A2 publication Critical patent/EP0095977A2/de
Publication of EP0095977A3 publication Critical patent/EP0095977A3/fr
Application granted granted Critical
Publication of EP0095977B1 publication Critical patent/EP0095977B1/de
Expired legal-status Critical Current

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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
    • 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
    • B28C7/10—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of rotary members, e.g. inclinable screws

Definitions

  • the present invention relates to the manufacture of concrete on construction sites, and more particularly to an improved mobile concrete plant.
  • the usual type concrete plants for example M50 from the company 'BURTON' STEEL, generally include a cement extraction device consisting of an integrated silo, equipped with a system of extracting screws and elevating screws bringing the cement to a weighing device, for example a scale, then to a mixer, which also leads to an aggregate, sand and pebble extraction device, by a mobile conveyor completed by a hopper and a second weighing device, for example a weighing belt.
  • a cement extraction device consisting of an integrated silo, equipped with a system of extracting screws and elevating screws bringing the cement to a weighing device, for example a scale, then to a mixer, which also leads to an aggregate, sand and pebble extraction device, by a mobile conveyor completed by a hopper and a second weighing device, for example a weighing belt.
  • the integrated cement silo occupies an inclined position along a slope of approximately 15 ° to limit its size, and generally comprises two parallel udders which channel the cement over the entire length.
  • an extractor screw In the bottom of each udder having the shape of a trough, is placed an extractor screw bringing back the cement to the rear of the silo from where it is extracted by two elevating screws placed on either side of the extractor screws.
  • These two tubular lifting screws pass through the silo over its entire length and bring the cement up to a scale from where it is poured into the mixer.
  • This device makes it possible to produce a relatively compact mobile concrete plant, but has drawbacks. Indeed the slopes of the udders do not allow a regular flow of the cement, and consequently the feeding of the extracting screws is irregular and it forms many "dead heaps". In addition, the concentration of cement in the rear part of the silo and the lack of channeling towards the two elevating screws cause an overload of these which causes an abnormal increase in intensity in the gearmotors which frequently trip.
  • US-A-3,945,619 describes a concrete plant with several elevating screws arranged in cascade. the first of which is placed at the highest end of the extractor screw; FR-A-2,417,451 relates to a worm conveyor comprising a horizontal screw and a vertical screw communicating with each other at their respective ends; US-A-4,219,279 describes a mobile material mixer in which the material passes from the extractor screw to the lifting screw via a conveyor belt.
  • the present invention relates to a mobile concrete batching plant of the above type, comprising a cement extraction device with a single extracting screw and a single lifting screw.
  • a more particular subject of the invention is a mobile concrete plant, the construction of which is simpler and the operation more efficient than conventional plants.
  • the mobile concrete batching plant in accordance with the present invention is of the type comprising a mixer which leads to an aggregate supply device, a water inlet, and a cement extraction device comprising a silo with an inclined trough bottom. along its longitudinal axis, V-section, an extractor screw placed in the trough, and an elevating screw; the extractor screw is a double-effect screw, the elevating screw, inclined at an angle of 30 to 70 ° relative to the horizontal, crosses the silo near the extractor screw, and the two screws communicate by a low neck length, the pitch of the turns of the extractor screw reversing at the level of the communication neck.
  • the inclination of the extraction device constituting a cement silo, in the operating position is approximately 10 to 20 ° relative to the horizontal, and preferably approximately 15 °.
  • the trough-shaped silo has a bottom, the cross section of which is V-shaped, the inclination of each plane relative to the horizontal being between 40 and 60 °, and preferably equal to approximately 50 °.
  • the trough of the extractor screw and the tube of the elevator screw communicate by a neck of short length oriented downwards, from the extractor screw to the elevator screw, located approximately 2/3 of the length of the silo from its lower end.
  • This position can vary and be modified if necessary by the technician depending on the inclination of the silo and the nature of the cement. It is generally preferable that this communication bottleneck is located in the upper part of the silo, near its middle.
  • the extractor screw located at the bottom of the trough is a double-acting screw: the turns located above the communication neck have a pitch to the left while the turns located below the neck have a step to the right, so that the rotary movement of the extractor screw has a driving effect of the cement contained in the silo, towards the neck of communication with the elevating screw, that is to say that the cement in the upper part is brought down, while the cement in the lower part is pushed up.
  • the operation of the screws is adjusted so that the flow rate of the extractor screw is greater than the flow rate of the lifting screw.
  • the diameter of the extractor screw can be between 200 and 300mm, the pitch of the turns being between 150 and 200mm in the upper part, and between 170 and 230mm in the lower part.
  • the diameter of the lifting screw can be between 200 and 300mm, the pitch of the turns being of the order of 150 to 250mm.
  • the inclination of the lifting screw is determined according to the operating conditions and the structure of the concrete plant. It can be between 30 and 70 ° relative to the horizontal, and preferably between 50 and 60 °.
  • the device according to the present invention provides an operation of good efficiency, in particular at the level of the feeding of the lifting screw, while reducing the material necessary for its construction, which reduces its manufacturing cost and improves its profitability. In addition, maintenance is facilitated, and the reliability of the device is improved.
  • the whole silo, mixer, cement scale and other accessories such as the aggregate weighing belt, the water supply and weighing device, can be mounted on a mobile machine that can be moved to the construction site.
  • the silo (1) is inclined at a slope of about 15 ° from the horizontal.
  • the bottom of this silo (1) has the shape of a V constituted by the two inclined planes (2) whose slope with respect to the horizontal is about 50 ° (cf. fig. 2).
  • a double-acting extractor screw (4) In the trough bottom (3) of the silo (1) is placed a double-acting extractor screw (4), supported by the intermediate bearing (5) and driven by a motor (not shown) placed at the end of the axis at its the top part.
  • It may for example be a motor with a power of the order of 11 kW (15 hp), driving the screw in a rotational movement of 65 revolutions / min, or a flow rate of 65 t / h, in the case of a 250mm diameter extractor screw with turns having a pitch of 170mm on the left in the upper part of the silo, and a pitch of 200mm on the right in the lower part.
  • the silo (1) is crossed in its upper part by a lifting screw (6) placed in a tube (7) which communicates with the trough (3) of the extracting screw (4) by the neck (8) located approximately at 2/3 of the length of the silo from the bottom end.
  • the screw (6) extracts the cement contained in the silo (1) and pours it into the cement scale (9) from where it is then poured into a conventional type mixer (not shown).
  • the lifting screw (6) is driven by a 7.36 kW (10 hp) motor, for example, giving it a rotation speed of 167 rpm, corresponding to a flow rate of 60 t / h for a screw 250 mm in diameter having turns whose pitch is 200mm.
  • Figures 3 and 4 show in more detail the extractor screw (4) in its trough (3), and the lifting screw (6) and the neck (8) connecting between the two screws.
  • the cement in the silo (1) is brought back by the double-acting extractor screw (4) towards the neck (8) where it falls by gravity onto the lifting screw (6) which rises it towards the scale.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Artificial Fish Reefs (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Claims (7)

1. Fahrbare Betonzentrale, enthaltend eine Mischmaschine, an der eine Zuführvorrichtung für Zuschläge, eine Wasserleitung und eine Zemententnahmevorrichtung enden, bestehend aus einem Silo (1), dessen Boden eine Rinne aufweist und der in seiner Längsachse geneigt ist und den Querschnitt eines V hat, einer Austragschnecke (4), die in der Rinne angeordnet ist, und einer Hubschnecke, dadurch gekennzeichnet, daß die Austragschnecke (4) eine doppelt wirkende Schnecke ist, die Hubschnecke (6) unter einem Winkel zwischen 30 und 70° gegenüber der Horizontalen geneigt ist und den Silo (1) nahe der Austragschnecke (4) durchquert und die zwei Schnecken über eine Rinne (8) kurzer Länge miteinander in Verbindung stehen und die Steigungsrichtung der Wände der Austragschnecke (4) sich in Höhe der Verbindungsrinne (8) umkehrt.
2. Fahrbare Betonzentrale nach Anspruch 1, dadurch gekennzeichnet, daß die Silolängsachse in einem Winkel von 10 bis 20° gegenüber der Horizontalen geneigt ist.
3. Fahrbare Betonzentrale nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Flächen, die den Boden des Silos von V-förmigem Querschnitt bilden, zwischen 40 und 60° gegenüber der Horizontalen geneigt sind.
4. Fahrbare Betonzentrale nach Anspruch 1, dadurch gekennzeichnet, daß die Austragschnecke und die Hubschnecke über eine Rinne kurzer Länge miteinander in Verbindung stehen, die bei etwa 2/3 der Länge des Silos, gemessen von seinem unteren Ende, angeordnet ist.
5. Fahrbare Betonzentrale nach Anspruch 1, dadurch gekennzeichnet, daß die doppelt wirkende Austragschnecke in ihrem oberen Abschnitt eine linksgängige Wendel und in ihrem unteren Abschnitt eine rechtsgängige Wendel aufweist.
6. Fahrbare Betonzentrale nach Anspruch 5, dadurch gekennzeichnet, daß die Wendelsteigung im unteren Abschnitt größer ist, als im oberen Abschnitt.
7. Fahrbare Betonzentrale nach Anspruch 1, dadurch gekennzeichnet, daß die Förderleistung der Austragschnecke größer ist, als die Förderleistung der Hubschnecke.
EP83401057A 1982-05-27 1983-05-26 Fahrbare Betonzentrale mit einer Vorrichtung zur Entnahme von Zement Expired EP0095977B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401057T ATE39078T1 (de) 1982-05-27 1983-05-26 Fahrbare betonzentrale mit einer vorrichtung zur entnahme von zement.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8209218 1982-05-27
FR8209218A FR2527504B1 (fr) 1982-05-27 1982-05-27 Centrale a beton mobile comportant un dispositif perfectionne d'extraction du ciment

Publications (3)

Publication Number Publication Date
EP0095977A2 EP0095977A2 (de) 1983-12-07
EP0095977A3 EP0095977A3 (en) 1984-06-06
EP0095977B1 true EP0095977B1 (de) 1988-12-07

Family

ID=9274386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401057A Expired EP0095977B1 (de) 1982-05-27 1983-05-26 Fahrbare Betonzentrale mit einer Vorrichtung zur Entnahme von Zement

Country Status (5)

Country Link
EP (1) EP0095977B1 (de)
AT (1) ATE39078T1 (de)
DE (1) DE3378619D1 (de)
FR (1) FR2527504B1 (de)
PT (1) PT76771B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH679999A5 (de) * 1989-11-22 1992-05-29 Adelrich Spescha
GB2258412A (en) * 1991-06-29 1993-02-10 Electrical Services Slurry containers
CN113277337B (zh) * 2021-06-10 2024-11-19 平顶山市安泰华矿用安全设备制造有限公司 煤渣计量上料装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2152623C3 (de) * 1971-10-22 1975-03-27 Eugen Dietterle Kg, Gips- Und Saegewerk, 7031 Gueltstein Vorrichtung zum kontinuierlichen Mischen und Verspritzen von Putzmörtel
US3945619A (en) * 1975-03-03 1976-03-23 Taibi Frank P Mobile continuous concrete proportioning plant
US4144655A (en) * 1976-08-30 1979-03-20 Harris And Thrush Manufacturing Company Portable storage bin
IT1161952B (it) * 1978-02-15 1987-03-18 Marchesini Wainer Trasportatore a colclea verticale o molto ripida e a coclea di alimentazione orizzontale
US4219279A (en) * 1979-03-26 1980-08-26 Haws Paul M Mobile gunnite material mixer

Also Published As

Publication number Publication date
EP0095977A2 (de) 1983-12-07
PT76771A (fr) 1983-06-01
ATE39078T1 (de) 1988-12-15
FR2527504A1 (fr) 1983-12-02
PT76771B (fr) 1986-01-27
DE3378619D1 (en) 1989-01-12
EP0095977A3 (en) 1984-06-06
FR2527504B1 (fr) 1987-04-24

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