EP3061891B1 - Discharging mechanism for a concrete bucket comprising a receptacle for the leakage of the laitance - Google Patents

Discharging mechanism for a concrete bucket comprising a receptacle for the leakage of the laitance Download PDF

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Publication number
EP3061891B1
EP3061891B1 EP16290043.5A EP16290043A EP3061891B1 EP 3061891 B1 EP3061891 B1 EP 3061891B1 EP 16290043 A EP16290043 A EP 16290043A EP 3061891 B1 EP3061891 B1 EP 3061891B1
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EP
European Patent Office
Prior art keywords
discharging mechanism
slot
receptacle
conduit
mechanism according
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EP16290043.5A
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German (de)
French (fr)
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EP3061891A1 (en
Inventor
Bertrand Gilles
Guillaume Gilles
Pierre-André Gilles
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Secatol SAS
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Secatol SAS
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    • 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
    • B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
    • B28C7/161—Discharge means, e.g. with intermediate storage of fresh concrete with storage reservoirs for temporarily storing the fresh concrete; Charging or discharging devices therefor
    • 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
    • E04G21/025—Buckets specially adapted for use with concrete

Definitions

  • the present invention relates to a dump mechanism provided to be fixed under a concrete dump site, and a concrete bucket equipped with such a dump mechanism.
  • Some sites using concrete for example for the construction of buildings or engineering structures, use buckets comprising a large upper opening receiving the concrete, said large opening overlooking a truncated hopper-shaped body or trunk- pyramidal whose inclined edges converge downwards to direct the concrete towards the center where there is a chute equipped with a shutter, forming a maneuverable hatch under the command of a site manager.
  • the control of the erasure of such a flap results in a free flow of concrete in a flexible pipe which is placed under the chute and which leads the concrete to a formwork, also called herehe, in which the concrete takes the desired form.
  • Concrete dumps generally comprise upper attachment means for suspending them to a crane, to successively present them to the device delivering the concrete, which may be a truck or a concrete mixer installed on the site, then the present on top of the formwork receiving this concrete flowing from the flexible pipe.
  • a type of dump mechanism known, presented in particular by the document FR-A1-2850692 , a document disclosing the features of the preamble of claim 1, comprises an upper flange which is screwed under the hopper of the bucket and which extends below by a vertical duct of short length, having a rectangular cross section.
  • the aforementioned vertical duct is entirely housed in a conical protective outer casing forming a funnel which has a large upper opening and whose base is extended by a circular underpass connected to the discharge pipe leading the concrete directly into the formwork.
  • a conical protective outer casing forming a funnel which has a large upper opening and whose base is extended by a circular underpass connected to the discharge pipe leading the concrete directly into the formwork.
  • the base of this vertical duct has a periphery substantially fitted on the inner surface of the conical envelope, this construction making it possible to produce a continuous flow surface of the concrete sliding in the duct and then in the lower part of the funnel.
  • the envelope is an independent part of the emptying mechanism and therefore represents additional manufacturing costs; in the same spirit, the special operations it requires to empty it require time and also entail additional costs.
  • Another known device for protecting against splashing includes plates forming a rear tray disposed below the emptying system, on the side of the slot used for the passage of the movable flap, in order to receive the milt flowing through it. slot. It is also necessary in this case to provide an additional assembly forming such a tilting rear tray for emptying, which is necessarily bulky, and perform periodically this emptying operation.
  • the present invention is intended in particular to eliminate all the disadvantages of the prior art.
  • a dump mechanism of a concrete body whose body forms a hopper which, in the working position, is arranged vertically vertically, said mechanism, intended to be fixed below said body, comprising a vertical duct of rectangular cross section having on its rear face a horizontal slot receiving a flap which is movable between a position said working or closing, in which it completely closes the passage inside said duct, and a so-called rest or opening position in which the flap is erased to allow free flow of the concrete vein via the interior passageway in the conduit, said emptying mechanism being characterized in that it further comprises an outer spoiler in the form of a receptacle whose bottom and two sides are integral with the rear face of the vertical duct, the bottom being born below the slot and extending upward to a level greater than that of said slot so that the receptacle thus formed is adapted to receive the milt flowing through this slot, the rear face of the vertical duct further having, at its base between the birth of the bottom of the receptacle and the slot,
  • An advantage of this emptying mechanism is that the spoiler is a compact element, simple and economical, can easily be attached to the side of the emptying system to form the receptacle of laitance leakage, which leaks are then through the aforementioned drilling , automatically directed downstream of the movable flap to the drain pipe below.
  • the emptying mechanism according to the invention may further comprise one or more of the following features, which may be combined
  • each of the two flanks of the spoiler is formed by a flange which is substantially disposed in the extension of one of the two lateral faces, respectively left and right, of the vertical duct.
  • each of the two flanges is adjusted to just below the deflection of the movable flap.
  • the vertical duct extends below by inclined lower planes converging towards the vertical axis of symmetry of said duct.
  • the bottom of the outer spoiler may constitute a rearward extension of one of the lower inclined planes.
  • the bore between the spoiler and the passage inside the duct is formed in the immediate vicinity of the base of the rear face of the duct.
  • the movable flap is constituted by a metal sheet whose each lateral end is directly fixed to the base of a pivoting bar disposed on one side of this mechanism.
  • the movable flap pivots about a transverse horizontal axis disposed above this mechanism in a substantially median plane of the emptying mechanism.
  • the drilling between the spoiler and the passage inside the conduit is in the form of a light which extends parallel to the slot.
  • the invention also has as a second object a concrete body whose body forms a hopper which, in the working position, is arranged vertically vertically and which has at its base an opening equipped with a dump mechanism made in accordance with one of any of the preceding features.
  • FIGS. 1 and 2 represent according to two different perspectives a concrete bucket 2 having an upper part of rectangular section constituted by vertical plates 4, which sheets extend below by four inclined faces which make up the lower and essential part of the body of the bucket 2 in the form of hopper 6, here truncal-pyramidal but which could also be frustoconical.
  • the walls of this hopper 6 converge downwards on a central opening surrounded by a flat lower fastening flange 8, made from a very thick sheet, rectangular or square, pierced near its four holes angles for the passage rods of bolts or other members 28 for fixing a dump mechanism.
  • the body of the bucket 2 In the working position, the body of the bucket 2 is disposed vertically vertically, that is to say at its center the The concrete that it contains flows vertically and the concrete vein that passes through the central opening with its hopper at the bottom also flows vertically.
  • a emptying mechanism 30, fixed below the lower flange 8, comprises a vertical control rod 32 disposed on one side of the body of the bucket which will be called “front side” throughout the rest of the description and which, on the Figures 1 and 2 , is indicated by the arrow marked "AV".
  • the top of the bucket 2 receives, in the middle of each of its front and rear faces, a vertical bar 18 whose upper end terminates in a lifting loop 10 provided to attach the bucket to a crane.
  • the upper opening of the bucket 2 is closed on the left side, by an inclined plate 20, and on each front and rear face, by a vertical plate 22, which leaves only open the right side for the entrance 14 of the concrete .
  • the left side of the bucket 2 receives a frame comprising two parallel support bars 12 which are arranged in a vertical plane, inclined towards the right side down, and which form a curvature to finish downwards. by a portion which is slightly inclined relative to the horizontal plane and which is arranged below the emptying mechanism 30.
  • the two support bars 12 are interconnected at their lower ends by a reinforcing bar 16 forming a "U" inverted and they are also interconnected, in their rectilinear parts, by a stiffening plate 26 which extends to the truncated-pyramidal portion of the body of the bucket, slightly above the fastening flange 8.
  • the frame makes it possible to place the bucket 2 on the ground with the crane, by tilting it to the side following the rounding of its two support bars 12, with a view to cleaning or storing it while protecting its mechanism. emptying 30 and the control device it has in the lower part.
  • FIGS. 3 to 8 show in more detail the emptying mechanism 30, which comprises in known manner a vertical duct 34 of rectangular section formed by four welded sheets which terminate in the upper part by a rectangular flat upper fastening flange 36 adapted to be fixed, for example by four bolts 28 arranged in the corners, to the fastening flange 8 provided in the part bottom of the hopper 6 of the bucket 2, and which terminate at the bottom by an outlet 40 of circular section receiving on its outer contour a flexible pipe 24 for discharging the concrete which will be maintained around the outlet duct 40 by a collar clamping, this in order to adjust the lower end of the pipe 24 in a form or form in which will be poured concrete in the bucket 2.
  • the vertical duct 34 is extended downwards by four inclined and convergent planes 38 towards the vertical axis of symmetry 54 of said duct 34, which planes 38 terminate in the vertical cylindrical outlet 40 intended to receive the pipe 24. evacuation of concrete.
  • the vertical duct 34 receives on the outside a fixed bar 42 which is welded and which rises vertically away from the axis 54 to escape the lower volume of the 2.
  • a movable bar 44 disposed substantially parallel to each fixed bar 42, outside thereof, is connected to said fixed bar by an upper articulation of horizontal axis 46.
  • Each movable bar 44 has a wide base receiving a control arm 48 facing the front of the bucket 2.
  • the front ends of the two control arms 48 are connected by a transverse bar 50 which receives in the middle the vertical control rod 32 allowing, by pulling, to rotate the movable bars 44 about the transverse horizontal axis 46 of their upper joints.
  • the two large bases of the movable bars 44 also support, by their rear parts, a transverse flap 52 for closing the vertical duct 34, said shutter constituting a hatch of longitudinal section in an arc of a circle, formed by a curved sheet having a constant radius of curvature centered on the axis 46 of the upper joints.
  • the flap 52 for closing the duct 34 penetrates inside said duct via a horizontal slot 68 disposed on the rear face 70 of the duct 34, and it fits between the two lateral faces of said duct 34 to come into a so-called working, or closing, up to the front face, position which is represented at the Figure 5 and in which it completely closes the internal passage 56 of this duct 34.
  • the closing flap 52 is constituted by a sheet each of whose two rear lateral ends is directly fixed to the base of a movable bar 44, which simplifies the manufacture.
  • the rear face 70 of the vertical duct 34 is moreover endowed throughout its width with a plate inclined backwards and upwards, this in order to form a spoiler 66 of U-shaped section whose bottom 60 rises upwards and ends slightly above the slot 68 receiving the movable flap 52.
  • each of the two sidewalls 64 of the spoiler 66 advantageously arranged in the extension of a lateral face, respectively left and right, of the vertical duct 34, comprises a sheet-metal rim, said flange 64 having a rounded upper contour for to come exactly below the clearance of the closure flap 52.
  • the bottom 60 and the two flanks 64 of the spoiler 66 thus constructed will thus constitute, with the rear face 70 of the duct 34, a receptacle fitted below this flap.
  • the container-shaped spoiler 66 is thus designed to collect the products that can flow through the slot 68, in particular the miltness of the concrete.
  • the base of the rear face 70 of the vertical duct 34 which is thus equipped with the receptacle 66 comprises a bore 62 allowing a natural flow of the milt coming into the receptacle 66.
  • This drilling 62 is advantageously made in the form of a horizontal light which therefore extends parallel to the slot 68.
  • the milt indeed descends along the inclined bottom 60 of the spoiler 66 and thus reaches the light 62 it crosses to finally descend into the discharge pipe 24.
  • the emptying mechanism 30 is open, thus both a descent of the concrete, directly into the discharge pipe 24, and a recovery in the same pipe 24 of the milt which could have passed through the slot 68 towards the outside of the duct 34.
  • the receptacle 66 has the advantage of only slightly increasing the size of the emptying mechanism 30. Moreover, it can be formed economically, its bottom 60 being for example a simple sheet extending the inclined rear face of a lower plane 38.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

La présente invention concerne un mécanisme de vidage prévu pour se fixer sous une benne à béton de chantier, ainsi qu'une benne à béton équipée d'un tel mécanisme de vidage.The present invention relates to a dump mechanism provided to be fixed under a concrete dump site, and a concrete bucket equipped with such a dump mechanism.

ARRIÈRE-PLAN TECHNOLOGIQUE DE L'INVENTIONBACKGROUND OF THE INVENTION

Certains chantiers mettant en oeuvre du béton, par exemple pour la construction d'immeubles ou d'ouvrages d'art, utilisent des bennes comprenant une large ouverture supérieure recevant le béton, ladite large ouverture surplombant un corps en forme de trémie tronconique ou tronc-pyramidale dont les bords inclinés convergent vers le bas afin de diriger le béton vers le centre où se trouve une goulotte équipée d'un volet de fermeture, formant une trappe manoeuvrable sous la commande d'un responsable de chantier. La commande de l'effacement d'un tel volet se traduit par un libre écoulement du béton dans un tuyau souple qui est placé sous la goulotte et qui conduit le béton jusqu'à un coffrage, appelé aussi banche, dans lequel le béton prend la forme voulue.Some sites using concrete, for example for the construction of buildings or engineering structures, use buckets comprising a large upper opening receiving the concrete, said large opening overlooking a truncated hopper-shaped body or trunk- pyramidal whose inclined edges converge downwards to direct the concrete towards the center where there is a chute equipped with a shutter, forming a maneuverable hatch under the command of a site manager. The control of the erasure of such a flap results in a free flow of concrete in a flexible pipe which is placed under the chute and which leads the concrete to a formwork, also called banche, in which the concrete takes the desired form.

Les bennes à béton comportent généralement en partie supérieure des moyens d'accrochage permettant de les suspendre à une grue, pour successivement les présenter au dispositif délivrant le béton, qui peut être un camion toupie ou une centrale à béton installée sur le chantier, puis les présenter au-dessus du coffrage recevant ce béton s'écoulant du tuyau souple.Concrete dumps generally comprise upper attachment means for suspending them to a crane, to successively present them to the device delivering the concrete, which may be a truck or a concrete mixer installed on the site, then the present on top of the formwork receiving this concrete flowing from the flexible pipe.

Un type de mécanisme de vidage connu, présenté notamment par le document FR-A1-2850692 , document divulguant les caractéristiques du préambule de la revendication 1, comporte une bride supérieure qui est vissée sous la trémie de la benne et qui se prolonge en dessous par un conduit vertical de petite longueur, présentant une section transversale rectangulaire.A type of dump mechanism known, presented in particular by the document FR-A1-2850692 , a document disclosing the features of the preamble of claim 1, comprises an upper flange which is screwed under the hopper of the bucket and which extends below by a vertical duct of short length, having a rectangular cross section.

Un volet de fermeture pivotant autour d'un axe horizontal disposé au-dessus du conduit précité, et manoeuvré par un levier extérieur, pénètre dans ledit conduit par une fente traversante réalisée dans une face latérale de ce conduit afin de venir s'ajuster dans son passage intérieur et fermer celui-ci entièrement. En position ouverte, dite encore de repos ou d'ouverture, le volet recule vers l'extérieur en dégageant complètement le passage dans le conduit, ce qui permet la descente du béton contenu dans le corps de la benne.A closing flap pivoting about a horizontal axis disposed above the above-mentioned duct, and operated by an external lever, penetrates into said duct through a through slot made in a lateral face of this duct so as to fit into its interior. interior passage and close this one entirely. In the open position, still called rest or opening, the flap retracts outwardly by completely clearing the passage in the conduit, which allows the descent of the concrete contained in the body of the bucket.

Le conduit vertical précité est entièrement logé dans une enveloppe extérieure conique de protection formant un entonnoir qui présente une large ouverture supérieure et dont la base est prolongée par un passage inférieur circulaire raccordé au tuyau d'évacuation conduisant le béton directement dans le coffrage. Une telle enveloppe extérieure, par sa forme en entonnoir, contenant ainsi le mécanisme de vidage, permet de recevoir toutes les fuites venant de ce mécanisme, en particulier celles venant de la fente dans laquelle le volet pivote dans ses mouvements de va-et-vient.The aforementioned vertical duct is entirely housed in a conical protective outer casing forming a funnel which has a large upper opening and whose base is extended by a circular underpass connected to the discharge pipe leading the concrete directly into the formwork. Such an outer casing, by its funnel shape, thus containing the emptying mechanism, allows to receive all the leaks coming from this mechanism, in particular those coming from the slot in which the shutter pivots in its movements back and forth .

La base de ce conduit vertical présente un pourtour sensiblement ajusté sur la surface intérieure de l'enveloppe conique, cette construction permettant de réaliser une surface continue d'écoulement du béton glissant dans le conduit puis dans la partie inférieure de l'entonnoir.The base of this vertical duct has a periphery substantially fitted on the inner surface of the conical envelope, this construction making it possible to produce a continuous flow surface of the concrete sliding in the duct and then in the lower part of the funnel.

De plus, du fait que l'ajustement du conduit sur la surface intérieure de l'enveloppe donne un jeu réduit entre ces deux parties, on limite ainsi les éclaboussements et les projections de béton lors de l'ouverture du volet. En effet, une descente rapide du béton placé dans le corps de la benne peut provoquer une compression brutale de l'air contenu dans le tuyau souple d'évacuation, dans le cas où l'extrémité de ce tuyau trempe dans du béton déjà distribué dans le coffrage et qui en conséquence obstrue cette extrémité. Dans ce cas, il se produit alors une remontée de l'air fortement comprimé dans le tuyau, qui peut projeter vers l'extérieur des gouttes de laitance en causant des éclaboussements si elles trouvent un passage assez grand au niveau du conduit du mécanisme de vidage.In addition, because the adjustment of the duct on the inner surface of the casing gives a reduced clearance between these two parts, so splashing and splashing of concrete is limited when opening the flap. Indeed, a rapid descent of the concrete placed in the body of the bucket can cause a sudden compression of the air contained in the evacuation hose, in the case where the end of this pipe dipped in concrete already distributed in the formwork and which consequently obstructs this end. In this case, there is a rise of strongly compressed air in the pipe, which can project drops of laitance towards the outside. causing splashing if they find a fairly large passage in the duct of the dump mechanism.

Un tel phénomène de fuites latérales de laitance autour du mécanisme de vidage s'observe en particulier au niveau de la fente recevant le volet de fermeture, ce qui a pour effet de provoquer un remplissage progressif, par la laitance, du réceptacle formé par l'enveloppe conique de protection autour du conduit, réceptacle qu'il faut vider manuellement quand la benne est posée au sol, par exemple par un basculement de cette enveloppe.Such a phenomenon of lateral leakage of laitance around the emptying mechanism is observed in particular at the slot receiving the closure flap, which has the effect of causing a progressive filling, by the milt, the receptacle formed by the conical protective envelope around the conduit, receptacle that must be emptied manually when the bucket is placed on the ground, for example by a tilting of this envelope.

Par ailleurs, l'enveloppe constitue une pièce indépendante du mécanisme de vidage et elle représente donc des coûts supplémentaires de fabrication ; dans le même esprit, les opérations particulières qu'elle nécessite pour la vider demandent du temps et entraînent aussi des coûts additionnels.Furthermore, the envelope is an independent part of the emptying mechanism and therefore represents additional manufacturing costs; in the same spirit, the special operations it requires to empty it require time and also entail additional costs.

Un autre dispositif connu de protection vis-à-vis des éclaboussements comporte des tôles formant un bac arrière disposé en dessous du système de vidage, du côté de la fente servant au passage du volet mobile, afin de recevoir la laitance s'écoulant par cette fente. Il faut aussi dans ce cas prévoir un ensemble supplémentaire formant un tel bac arrière basculant pour sa vidange, lequel est nécessairement encombrant, et réaliser périodiquement cette opération de vidange.Another known device for protecting against splashing includes plates forming a rear tray disposed below the emptying system, on the side of the slot used for the passage of the movable flap, in order to receive the milt flowing through it. slot. It is also necessary in this case to provide an additional assembly forming such a tilting rear tray for emptying, which is necessarily bulky, and perform periodically this emptying operation.

DESCRIPTION GÉNÉRALE DE L'INVENTIONGENERAL DESCRIPTION OF THE INVENTION

La présente invention a notamment pour but d'éliminer tous les inconvénients de la technique antérieure.The present invention is intended in particular to eliminate all the disadvantages of the prior art.

Elle propose donc à cet effet un mécanisme de vidage d'une benne à béton dont le corps forme une trémie qui, en position de travail, est disposée globalement verticalement, ledit mécanisme, prévu pour être fixé en dessous dudit corps, comprenant un conduit vertical de section transversale rectangulaire présentant sur sa face arrière une fente horizontale recevant un volet qui est mobile entre une position dite de travail ou de fermeture, dans laquelle il obture totalement le passage intérieur audit conduit, et une position dite de repos ou d'ouverture dans laquelle le volet s'efface afin de permettre un libre écoulement de la veine de béton via le passage intérieur au conduit, ledit mécanisme de vidage étant caractérisé en ce qu'il comprend en outre un béquet extérieur en forme de réceptacle dont le fond et les deux flancs sont solidaires de la face arrière du conduit vertical, le fond prenant naissance en dessous de la fente et se prolongeant en remontant à un niveau supérieur à celui de ladite fente afin que le réceptacle ainsi formé soit apte à recevoir la laitance coulant par cette fente, la face arrière du conduit vertical présentant en outre, à sa base entre la naissance du fond du réceptacle et la fente, un perçage débouchant dans le passage intérieur et dans le réceptacle en dessous du volet mobile.It therefore proposes for this purpose a dump mechanism of a concrete body whose body forms a hopper which, in the working position, is arranged vertically vertically, said mechanism, intended to be fixed below said body, comprising a vertical duct of rectangular cross section having on its rear face a horizontal slot receiving a flap which is movable between a position said working or closing, in which it completely closes the passage inside said duct, and a so-called rest or opening position in which the flap is erased to allow free flow of the concrete vein via the interior passageway in the conduit, said emptying mechanism being characterized in that it further comprises an outer spoiler in the form of a receptacle whose bottom and two sides are integral with the rear face of the vertical duct, the bottom being born below the slot and extending upward to a level greater than that of said slot so that the receptacle thus formed is adapted to receive the milt flowing through this slot, the rear face of the vertical duct further having, at its base between the birth of the bottom of the receptacle and the slot, a hole opening into the inner passage and into the receptacle below the movable flap.

Un avantage de ce mécanisme de vidage est que le béquet constitue un élément compact, simple et économique, pouvant facilement être rapporté sur le côté du système de vidage pour former le réceptacle des fuites de laitance, lesquelles fuites sont alors, à travers le perçage précité, automatiquement dirigées en aval du volet mobile vers le tuyau d'évacuation se trouvant en dessous.An advantage of this emptying mechanism is that the spoiler is a compact element, simple and economical, can easily be attached to the side of the emptying system to form the receptacle of laitance leakage, which leaks are then through the aforementioned drilling , automatically directed downstream of the movable flap to the drain pipe below.

De plus, en cas de surpression d'air dans le tuyau d'évacuation en dessous du volet, lors de son ouverture, cet air peut facilement remonter et s'évacuer par le perçage pour déboucher dans le réceptacle formé par le béquet, qui reçoit alors les gouttes de laitance projetées en évitant leur dispersion vers l'extérieur.In addition, in case of overpressure of air in the discharge pipe below the flap, when it opens, this air can easily rise and escape through the bore to open into the receptacle formed by the spoiler, which receives then the drops of milt projected avoiding their dispersion to the outside.

Le mécanisme de vidage selon l'invention peut de plus comporter une ou plusieurs des caractéristiques suivantes, qui peuvent être combinéesThe emptying mechanism according to the invention may further comprise one or more of the following features, which may be combined

Avantageusement, chacun des deux flancs du béquet est formé par un rebord qui est sensiblement disposé dans le prolongement de l'une des deux faces latérales, respectivement gauche et droite, du conduit vertical.Advantageously, each of the two flanks of the spoiler is formed by a flange which is substantially disposed in the extension of one of the two lateral faces, respectively left and right, of the vertical duct.

Dans cette construction, le contour supérieur de chacun des deux rebords est ajusté pour venir juste en dessous du débattement du volet mobile.In this construction, the upper contour of each of the two flanges is adjusted to just below the deflection of the movable flap.

Toujours avantageusement, le conduit vertical se prolonge en dessous par des plans inférieurs inclinés et convergents vers l'axe de symétrie vertical dudit conduit.Advantageously, the vertical duct extends below by inclined lower planes converging towards the vertical axis of symmetry of said duct.

Dans ce cas, le fond du béquet extérieur peut constituer un prolongement vers l'arrière de l'un des plans inclinés inférieurs.In this case, the bottom of the outer spoiler may constitute a rearward extension of one of the lower inclined planes.

Selon une construction préférentielle, le perçage entre le béquet et le passage intérieur au conduit est formé à proximité immédiate de la base de la face arrière du conduit.According to a preferred construction, the bore between the spoiler and the passage inside the duct is formed in the immediate vicinity of the base of the rear face of the duct.

De préférence, le volet mobile est constitué par une tôle dont chaque extrémité latérale est directement fixée à la base d'une barre pivotante disposée sur un côté de ce mécanisme.Preferably, the movable flap is constituted by a metal sheet whose each lateral end is directly fixed to the base of a pivoting bar disposed on one side of this mechanism.

De préférence également, le volet mobile pivote autour d'un axe horizontal transversal disposé au-dessus de ce mécanisme dans un plan sensiblement médian du mécanisme de vidage.Also preferably, the movable flap pivots about a transverse horizontal axis disposed above this mechanism in a substantially median plane of the emptying mechanism.

Selon encore une autre construction particulièrement avantageuse, le perçage entre le béquet et le passage intérieur au conduit est réalisé sous la forme d'une lumière qui s'étend parallèlement à la fente.According to yet another particularly advantageous construction, the drilling between the spoiler and the passage inside the conduit is in the form of a light which extends parallel to the slot.

L'invention a aussi pour second objet une benne à béton dont le corps forme une trémie qui, en position de travail, est disposée globalement verticalement et qui présente à sa base une ouverture équipée d'un mécanisme de vidage réalisé conformément à l'une quelconque des caractéristiques précédentes.The invention also has as a second object a concrete body whose body forms a hopper which, in the working position, is arranged vertically vertically and which has at its base an opening equipped with a dump mechanism made in accordance with one of any of the preceding features.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

Les spécifications détaillées de l'invention sont données dans la description qui suit en liaison avec les dessins ci-annexés. Il est à noter que ces dessins n'ont d'autre but que celui d'illustrer le texte de la description et qu'ils ne constituent donc en aucune sorte une limitation de la portée de l'invention.The detailed specifications of the invention are given in the following description in conjunction with the accompanying drawings. It should be noted that these drawings have no other purpose than that of illustrating the text of the description and that they therefore in no way constitute a limitation of the scope of the invention.

Dans ces dessins :

  • les Figures 1 et 2 sont des vues en perspective, présentées suivant deux angles différents, d'une benne à béton équipée d'un mécanisme de vidage selon l'invention ;
  • la Figure 3 est une vue en perspective du mécanisme de vidage selon l'invention ;
  • la Figure 4 est une vue du côté arrière de ce mécanisme de vidage ;
  • la Figure 5 est une vue suivant le plan axial de coupe V-V de ce même mécanisme de vidage, le volet mobile de ce mécanisme occupant sa position dite de travail ou de fermeture;
  • la Figure 6 est une vue de détail du réceptacle du mécanisme de vidage représenté à la Figure 5, et
  • les Figures 7 et 8 sont des vues identiques aux Figures 5 et 6, le volet mobile du mécanisme de vidage occupant cette fois sa position dite de repos ou encore d'ouverture.
In these drawings:
  • the Figures 1 and 2 are perspective views, presented at two different angles, of a concrete bucket equipped with a dump mechanism according to the invention;
  • the Figure 3 is a perspective view of the emptying mechanism according to the invention;
  • the Figure 4 is a view of the back side of this dump mechanism;
  • the Figure 5 is a view along the axial plane of section VV of the same emptying mechanism, the movable flap of this mechanism occupying its so-called working or closing position;
  • the Figure 6 is a detailed view of the receptacle of the emptying mechanism shown in FIG. Figure 5 , and
  • the Figures 7 and 8 are views identical to Figures 5 and 6 , the mobile flap of the emptying mechanism occupying this time its so-called rest position or opening.

DESCRIPTION DES MODES DE RÉALISATION PRÉFÉRÉS DE L'INVENTION DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION

Les Figures 1 et 2 représentent selon deux perspectives différentes une benne à béton 2 présentant une partie supérieure de section rectangulaire constituée par des tôles verticales 4, lesquelles tôles se prolongent en dessous par quatre faces inclinées qui composent la partie inférieure et essentielle du corps de la benne 2 en forme de trémie 6, ici tronc-pyramidale mais qui pourrait aussi être tronconique. Les parois de cette trémie 6 convergent vers le bas sur une ouverture centrale entourée par une bride de fixation inférieure plane 8, réalisée à partir d'une tôle très épaisse, rectangulaire ou carrée, percée à proximité de ses quatre angles de trous pour le passage des tiges de boulons ou autres organes 28 destinés à la fixation d'un mécanisme de vidage.The Figures 1 and 2 represent according to two different perspectives a concrete bucket 2 having an upper part of rectangular section constituted by vertical plates 4, which sheets extend below by four inclined faces which make up the lower and essential part of the body of the bucket 2 in the form of hopper 6, here truncal-pyramidal but which could also be frustoconical. The walls of this hopper 6 converge downwards on a central opening surrounded by a flat lower fastening flange 8, made from a very thick sheet, rectangular or square, pierced near its four holes angles for the passage rods of bolts or other members 28 for fixing a dump mechanism.

En position de travail, le corps de la benne 2 est disposé globalement verticalement, c'est-à-dire qu'en son centre le béton qu'elle contient s'écoule verticalement et que la veine de béton qui traverse l'ouverture centrale dont la trémie est dotée à sa partie inférieure s'écoule également verticalement.In the working position, the body of the bucket 2 is disposed vertically vertically, that is to say at its center the The concrete that it contains flows vertically and the concrete vein that passes through the central opening with its hopper at the bottom also flows vertically.

Un mécanisme de vidage 30, fixé en dessous de la bride inférieure 8, comporte une tige de commande verticale 32 disposée sur un côté du corps de la benne qui sera appelé « côté avant » dans toute la suite de la description et qui, sur les Figures 1 et 2, est indiqué par la flèche notée « AV ».A emptying mechanism 30, fixed below the lower flange 8, comprises a vertical control rod 32 disposed on one side of the body of the bucket which will be called "front side" throughout the rest of the description and which, on the Figures 1 and 2 , is indicated by the arrow marked "AV".

De façon traditionnelle, le dessus de la benne 2 reçoit, au milieu de chacune de ses faces avant et arrière, une barre verticale 18 dont l'extrémité supérieure se termine par une boucle de levage 10 prévue pour fixer la benne à une grue. L'ouverture supérieure de la benne 2 est fermée sur le côté gauche, par une tôle inclinée 20, et sur chaque face avant et arrière, par une tôle verticale 22, ce qui laisse seul ouvert le côté droit pour l'entrée 14 du béton.Traditionally, the top of the bucket 2 receives, in the middle of each of its front and rear faces, a vertical bar 18 whose upper end terminates in a lifting loop 10 provided to attach the bucket to a crane. The upper opening of the bucket 2 is closed on the left side, by an inclined plate 20, and on each front and rear face, by a vertical plate 22, which leaves only open the right side for the entrance 14 of the concrete .

Dans l'exemple représenté, le côté gauche de la benne 2 reçoit un châssis comprenant deux barres parallèles d'appui 12 qui sont disposées dans un plan vertical, inclinées vers le côté droit en descendant, et qui forment vers le bas une courbure pour finir par une partie qui est légèrement inclinée par rapport au plan horizontal et qui est disposée en dessous du mécanisme de vidage 30. Les deux barres d'appui 12 sont reliées entre elles à leurs extrémités inférieures par une barre de renfort 16 formant un « U » inversé et elles sont également reliées entre elles, dans leurs parties rectilignes, par une plaque de raidissement 26 qui s'étend jusqu'à la partie tronc-pyramidale du corps de la benne, légèrement au-dessus de la bride de fixation 8.In the example shown, the left side of the bucket 2 receives a frame comprising two parallel support bars 12 which are arranged in a vertical plane, inclined towards the right side down, and which form a curvature to finish downwards. by a portion which is slightly inclined relative to the horizontal plane and which is arranged below the emptying mechanism 30. The two support bars 12 are interconnected at their lower ends by a reinforcing bar 16 forming a "U" inverted and they are also interconnected, in their rectilinear parts, by a stiffening plate 26 which extends to the truncated-pyramidal portion of the body of the bucket, slightly above the fastening flange 8.

Le châssis permet de poser avec la grue la benne 2 au sol, en la faisant basculer sur le côté en suivant l'arrondi de ses deux barres d'appui 12, en vue de la nettoyer ou de la stocker tout en protégeant son mécanisme de vidage 30 ainsi que le dispositif de commande qu'elle présente en partie basse.The frame makes it possible to place the bucket 2 on the ground with the crane, by tilting it to the side following the rounding of its two support bars 12, with a view to cleaning or storing it while protecting its mechanism. emptying 30 and the control device it has in the lower part.

Les Figures 3 à 8 présentent plus en détail le mécanisme de vidage 30, lequel comprend de façon connue un conduit vertical 34 de section rectangulaire formé par quatre tôles soudées qui se terminent en partie haute par une bride rectangulaire de fixation supérieure plane 36 prévue pour être fixée, par exemple par quatre boulons 28 disposés dans les angles, à la bride de fixation 8 prévue à la partie inférieure de la trémie 6 de la benne 2, et qui se terminent en partie basse par une sortie 40 de section circulaire recevant sur son contour extérieur un tuyau souple 24 d'évacuation du béton qui sera maintenu autour du conduit de sortie 40 par un collier de serrage, ceci afin de pouvoir ajuster l'extrémité inférieure du tuyau 24 dans un coffrage ou banche dans lequel sera déversé le béton contenu dans la benne 2.The Figures 3 to 8 show in more detail the emptying mechanism 30, which comprises in known manner a vertical duct 34 of rectangular section formed by four welded sheets which terminate in the upper part by a rectangular flat upper fastening flange 36 adapted to be fixed, for example by four bolts 28 arranged in the corners, to the fastening flange 8 provided in the part bottom of the hopper 6 of the bucket 2, and which terminate at the bottom by an outlet 40 of circular section receiving on its outer contour a flexible pipe 24 for discharging the concrete which will be maintained around the outlet duct 40 by a collar clamping, this in order to adjust the lower end of the pipe 24 in a form or form in which will be poured concrete in the bucket 2.

Dans la construction représentée, le conduit vertical 34 se prolonge vers le bas par quatre plans 38 inclinés et convergents vers l'axe de symétrie vertical 54 dudit conduit 34, lesquels plans 38 se terminent par la sortie cylindrique verticale 40 prévue pour recevoir le tuyau 24 d'évacuation du béton.In the construction shown, the vertical duct 34 is extended downwards by four inclined and convergent planes 38 towards the vertical axis of symmetry 54 of said duct 34, which planes 38 terminate in the vertical cylindrical outlet 40 intended to receive the pipe 24. evacuation of concrete.

Au milieu de chacune de ses faces latérales, respectivement droite et gauche, le conduit vertical 34 reçoit à l'extérieur une barre fixe 42 qui est soudée et qui monte verticalement en s'écartant de l'axe 54 pour échapper au volume inférieur de la benne 2. Une barre mobile 44, disposée sensiblement parallèlement à chaque barre fixe 42, à l'extérieur de celle-ci, est reliée à ladite barre fixe par une articulation supérieure d'axe horizontal 46.In the middle of each of its lateral faces, respectively right and left, the vertical duct 34 receives on the outside a fixed bar 42 which is welded and which rises vertically away from the axis 54 to escape the lower volume of the 2. A movable bar 44, disposed substantially parallel to each fixed bar 42, outside thereof, is connected to said fixed bar by an upper articulation of horizontal axis 46.

Chaque barre mobile 44 présente une large base recevant un bras de commande 48 tourné vers l'avant de la benne 2. Les extrémités avant des deux bras de commande 48 sont reliées par une barre transversale 50 qui reçoit en son milieu la tige de commande verticale 32 permettant, en tirant dessus, de faire pivoter les barres mobiles 44 autour de l'axe horizontal transversal 46 de leurs articulations supérieures.Each movable bar 44 has a wide base receiving a control arm 48 facing the front of the bucket 2. The front ends of the two control arms 48 are connected by a transverse bar 50 which receives in the middle the vertical control rod 32 allowing, by pulling, to rotate the movable bars 44 about the transverse horizontal axis 46 of their upper joints.

Les deux larges bases des barres mobiles 44 supportent par ailleurs, par leurs parties arrières, un volet transversal 52 de fermeture du conduit vertical 34, ledit volet constituant une trappe de section longitudinale en arc de cercle, formée par une tôle cintrée présentant un rayon de courbure constant centré sur l'axe 46 des articulations supérieures. Le volet 52 de fermeture du conduit 34 pénètre à l'intérieur dudit conduit par une fente horizontale 68 disposée sur la face arrière 70 du conduit 34, et il s'ajuste entre les deux faces latérales dudit conduit 34 pour venir, dans une position dite de travail, ou de fermeture, jusqu'à la face avant, position qui est représentée à la Figure 5 et dans laquelle il obture complètement le passage intérieur 56 de ce conduit 34.The two large bases of the movable bars 44 also support, by their rear parts, a transverse flap 52 for closing the vertical duct 34, said shutter constituting a hatch of longitudinal section in an arc of a circle, formed by a curved sheet having a constant radius of curvature centered on the axis 46 of the upper joints. The flap 52 for closing the duct 34 penetrates inside said duct via a horizontal slot 68 disposed on the rear face 70 of the duct 34, and it fits between the two lateral faces of said duct 34 to come into a so-called working, or closing, up to the front face, position which is represented at the Figure 5 and in which it completely closes the internal passage 56 of this duct 34.

Avantageusement, le volet de fermeture 52 est constitué par une tôle dont chacune des deux extrémités latérales arrières est directement fixée à la base d'une barre mobile 44, ce qui simplifie la fabrication.Advantageously, the closing flap 52 is constituted by a sheet each of whose two rear lateral ends is directly fixed to the base of a movable bar 44, which simplifies the manufacture.

S'il baisse fortement la tige de commande 32, l'opérateur relève les barres mobiles 44 en les faisant pivoter vers l'arrière, ce qui a pour effet de faire reculer le volet de fermeture 52 et donc d'ouvrir complètement le conduit vertical 34. On dégage ainsi entièrement le passage intérieur 56 du conduit vertical 34, qui ne présente alors plus que des parois lisses permettant ainsi au béton contenu dans le corps de la benne 2 de glisser vers le tuyau d'évacuation 24.If it strongly lowers the control rod 32, the operator raises the movable bars 44 by pivoting them backwards, which has the effect of rolling back the closure flap 52 and thus completely open the vertical duct 34. The entire internal passage 56 of the vertical duct 34 is thus completely disengaged, which then has only smooth walls, thus allowing the concrete contained in the body of the skip 2 to slide towards the discharge pipe 24.

La face arrière 70 du conduit vertical 34 est par ailleurs dotée sur toute sa largeur d'une tôle inclinée vers l'arrière et vers le haut, ceci afin de former un béquet 66 de section en U dont le fond 60 remonte vers le haut et se termine un peu au-dessus de la fente 68 recevant le volet mobile 52.The rear face 70 of the vertical duct 34 is moreover endowed throughout its width with a plate inclined backwards and upwards, this in order to form a spoiler 66 of U-shaped section whose bottom 60 rises upwards and ends slightly above the slot 68 receiving the movable flap 52.

L'extrémité supérieure de chacun des deux flancs 64 du béquet 66, avantageusement disposé dans le prolongement d'une face latérale, respectivement gauche et droite, du conduit vertical 34, comporte un rebord en tôle, ledit rebord 64 présentant un contour supérieur arrondi pour venir exactement en dessous du débattement du volet de fermeture 52. Le fond 60 et les deux flancs 64 du béquet 66 ainsi construit vont donc constituer, avec la face arrière 70 du conduit 34, un réceptacle ajusté en dessous de ce volet.The upper end of each of the two sidewalls 64 of the spoiler 66, advantageously arranged in the extension of a lateral face, respectively left and right, of the vertical duct 34, comprises a sheet-metal rim, said flange 64 having a rounded upper contour for to come exactly below the clearance of the closure flap 52. The bottom 60 and the two flanks 64 of the spoiler 66 thus constructed will thus constitute, with the rear face 70 of the duct 34, a receptacle fitted below this flap.

Le béquet en forme de réceptacle 66 est ainsi conçu pour recueillir les produits qui peuvent s'écouler au travers de la fente 68, en particulier la laitance du béton.The container-shaped spoiler 66 is thus designed to collect the products that can flow through the slot 68, in particular the miltness of the concrete.

En outre, la base de la face arrière 70 du conduit vertical 34 qui se trouve ainsi équipée du réceptacle 66 comporte un perçage 62 permettant un écoulement naturel de la laitance venant dans le réceptacle 66. Ce perçage 62 est avantageusement réalisé sous la forme d'une lumière horizontale qui s'étend donc parallèlement à la fente 68. La laitance descend en effet le long du fond incliné 60 du béquet 66 et atteint ainsi la lumière 62 qu'elle traverse pour descendre enfin dans le tuyau d'évacuation 24. Pendant le vidage de la benne dans le tuyau d'évacuation, quand le mécanisme de vidage 30 est ouvert, on obtient ainsi à la fois une descente du béton, directement dans le tuyau d'évacuation 24, et une récupération dans ce même tuyau 24 de la laitance qui a pu passer par la fente 68 vers l'extérieur du conduit 34.In addition, the base of the rear face 70 of the vertical duct 34 which is thus equipped with the receptacle 66 comprises a bore 62 allowing a natural flow of the milt coming into the receptacle 66. This drilling 62 is advantageously made in the form of a horizontal light which therefore extends parallel to the slot 68. The milt indeed descends along the inclined bottom 60 of the spoiler 66 and thus reaches the light 62 it crosses to finally descend into the discharge pipe 24. During the emptying of the bucket in the discharge pipe, when the emptying mechanism 30 is open, thus both a descent of the concrete, directly into the discharge pipe 24, and a recovery in the same pipe 24 of the milt which could have passed through the slot 68 towards the outside of the duct 34.

De plus, dans l'éventualité où, au début de la descente du béton dans le tuyau d'évacuation 24, l'extrémité inférieure de ce tuyau aurait été obstruée par du béton se trouvant dans le coffrage à remplir, toute la laitance chassée par l'air comprimé qui remonte violemment et qui sort par la lumière 62 ou par la fente 68 est récupérée dans le réceptacle 66 pour redescendre ensuite dans ce tuyau 24. On évite ainsi des projections et éclaboussements vers l'extérieur qui saliraient le chantier et obligeraient de procéder à des nettoyages.In addition, in the event that, at the beginning of the descent of the concrete in the discharge pipe 24, the lower end of this pipe would have been obstructed by concrete in the formwork to be filled, all the laitance driven by the compressed air which rises violently and which comes out through the light 62 or through the slot 68 is recovered in the receptacle 66 and down again in this pipe 24. This avoids splashing and splashing to the outside which would soil the site and force clean up.

Il y a lieu de noter de surcroît que, à la fin du vidage de la benne 2, il n'y a pas d'opération particulière à effectuer pour vidanger le réceptacle 66 puisque celui-ci s'est vidé en continu à travers la lumière 62.It should also be noted that, at the end of the emptying of the bucket 2, there is no particular operation to be performed to empty the receptacle 66 since it has emptied continuously through the light 62.

Le réceptacle 66 a l'avantage de n'augmenter que très peu l'encombrement du mécanisme de vidage 30. De plus, il peut être formé de manière économique, son fond 60 étant par exemple une simple tôle prolongeant la face arrière inclinée d'un plan inférieur 38.The receptacle 66 has the advantage of only slightly increasing the size of the emptying mechanism 30. Moreover, it can be formed economically, its bottom 60 being for example a simple sheet extending the inclined rear face of a lower plane 38.

Comme il va de soi, l'invention ne se limite pas aux seuls modes d'exécution préférentiels décrits ci-dessus.It goes without saying that the invention is not limited to the only preferred embodiments described above.

Elle embrasse au contraire toutes les variantes possibles de réalisation, pour autant que ces dernières ne sortent pas du cadre délimité par les revendications ci-jointes qui définissent la portée de la présente invention.On the contrary, it embraces all the possible variants of embodiment, insofar as the latter do not go beyond the scope delimited by the appended claims which define the scope of the present invention.

Claims (10)

  1. Discharging mechanism (30) for a concrete bucket (2) the body of which forms a hopper (6) which, in the working position, is disposed generally vertically, the said mechanism, designed to be fixed under the said body, comprising a vertical conduit (34) of rectangular transverse section having on its rear face (70) a horizontal slot (68) receiving a shutter (52) which is able to move between a so-called working or closed position, in which it totally blocks the internal passage (56) of the said conduit (34), and a so-called resting or open position in which the shutter (52) is withdrawn in order to allow free flow of the stream of concrete via the internal passage (56) of the said conduit, characterised in that it additionally comprises an external projection (66) in the form of a receptacle of which the bottom (60) and the two flanks (64) are formed integrally with the rear face (70) of the vertical conduit (34), the bottom (60) starting under the slot (68) and extending upwards to a level above that of the said slot (68) so that the receptacle (66) so formed is capable of receiving the cement slurry flowing through this slot, the rear face (70) of the vertical conduit (34) additionally having at its base between the start of the bottom (60) of the receptacle (66) and the slot (68) an opening (62) debouching into the internal passage (56) and into the receptacle (66) under the movable shutter (52).
  2. Discharging mechanism according to claim 1, characterised in that each of the two flanks (64) of the projection (66) is formed by a lip which is substantially disposed in the extension of one of the two side faces, respectively on the left and the right, of the vertical conduit (34).
  3. Discharging mechanism according to claim 2, characterised in that the upper contour of each of the two lips (64) is adjusted to just clear the underside of the movable shutter (52).
  4. Discharging mechanism according to any one of claims 1 to 3, characterised in that the vertical conduit (34) is extended underneath with lower walls (38) which are inclined and converge towards the vertical axis of symmetry (54) of the said conduit.
  5. Discharging mechanism according to claim 4, characterised in.that the bottom (60) of the external projection (66) forms an extension towards the rear of one of the lower walls (38).
  6. Discharging mechanism according to any one of claims 1 to 5, characterised in that the opening (62) is formed in the immediate vicinity of the base of the rear face (70) of the conduit (34).
  7. Discharging mechanism according to any one of claims 1 to 6, characterised in that the movable shutter (52) is formed by a sheet each side end of which is fixed directly to the base of a pivoting bar (44) disposed on one side of this mechanism.
  8. Discharging mechanism according to any one of claims 1 to 7, characterised in that the movable shutter (52) pivots around a transverse horizontal axis (46) disposed above this mechanism in a substantially median plane of the discharging mechanism (30).
  9. Discharging mechanism according to any one of claims 1 to 8, characterised in that the opening (62) is embodied in the form of a slit which extends parallel to the slot (68).
  10. Concrete bucket (2) the body of which forms a hopper (6) which, in the working position, is disposed generally vertically, the said hopper having at its base an opening fitted with a discharging mechanism (30), characterised in that this discharging mechanism (30) is embodied according to any one of the preceding claims.
EP16290043.5A 2015-02-25 2016-02-24 Discharging mechanism for a concrete bucket comprising a receptacle for the leakage of the laitance Active EP3061891B1 (en)

Applications Claiming Priority (1)

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FR1500365A FR3032990B1 (en) 2015-02-25 2015-02-25 VACUUM MECHANISM FOR A CONCRETE BENCH HAVING A RECEPTACLE FOR LEAKAGE LEAKS

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EP3061891A1 EP3061891A1 (en) 2016-08-31
EP3061891B1 true EP3061891B1 (en) 2017-01-11

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ES (1) ES2622425T3 (en)
FR (1) FR3032990B1 (en)
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CN108756245B (en) * 2018-05-28 2020-05-22 河海大学 Method for pouring concrete by step by using large-scale aggregate concrete pouring hopper
CN109366740B (en) * 2018-10-10 2020-12-04 泉州台商投资区久协机械科技有限公司 Annular convergence concrete proportioning machine with supporting plate externally-clapped sliding wall and material-ejecting function
CN113684342B (en) * 2021-08-28 2022-12-23 浙江奕鼎新材料有限公司 Safe overturning and discharging device of steel electric furnace
CN115492393B (en) * 2022-11-05 2023-07-28 中国二十二冶集团有限公司 Self-compacting concrete pouring device and application method thereof
CN117621262B (en) * 2024-01-24 2024-03-29 泉州恒兴能源节能技术有限公司 Special quick repair concrete forced mixer truck in integrated airport

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FR2637834B1 (en) * 1988-10-13 1992-07-10 Gilles Auguste DEVICE FOR TRANSFERRING THE CONCRETE FROM A BUCKET INTO A SOLIDARITY PIPE FOR THE BUCKET
FR2850692B1 (en) * 2003-02-21 2005-03-04 D Applic De Tolerie Secatol So DEVICE FOR EMPTYING CONCRETE TANK

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FR3032990A1 (en) 2016-08-26
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FR3032990B1 (en) 2017-01-20
MA40124B1 (en) 2017-04-28
PT3061891T (en) 2017-04-20

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