FR2674790A1 - TRANSPORTABLE CONCRETE PLANT AND DEVICE FOR TRANSPORTING IT. - Google Patents

Abstract

The invention relates to a concrete batching plant. The plant comprises a frame (1) which carries a mixing bowl (2) and one or more silos for containing one or more of the constituents of the concrete, the silo or silos constituting a block (3) pivotally mounted on said frame (1 ) of the unit to be able to switch from a transport position to a service position, retractable means (5, 6) being provided to keep the unit in the service position. The invention also relates to a device for transporting the plant, this device being for example a semi-trailer. The invention applies to a transportable concrete plant.

Description

I

  The invention relates to a transportable concrete plant.

  A concrete batching plant comprises in a manner known per se a frame which carries a kneading bowl and means for feeding this bowl with the constituents of the concrete mix, one or more silos for containing at least some of these constituents, possibly various accessories. The mixing bowl is for example a bowl which rotates about itself about a horizontal axis or a fixed vertical bowl provided with a system of

internal mixing.

  Known concrete plants, when they are transportable,

  require multiple transport and assembly operations.

  Their design indeed does not allow to transport together the frame which carries the mixing bowl and the silos: it is necessary to dissociate the silos

  chassis and perform several transports.

  The present invention aims to provide a transportable concrete plant as a unit with its silos and whose implementation is facilitated. According to the invention, this is achieved by the fact that the silos or the silos of the central unit constitute a block pivotally mounted on the frame which carries the mixing bowl, in order to be able to switch from a transport position to a position of rotation. service, retractable means being provided to maintain

the block in the service position.

  The tilting of the silo block (s) is obtained by any appropriate means (hoist, crane, etc.), preferably by means of jack (s) tilt. In a preferred embodiment, the frame of the plant equipped with the mixing bowl and various accessories and the block of silo (s) are placed on a conveyor where the block of silo (s) is in substantially horizontal position

  while the chassis is in its normal position.

  Preferably, the tilting of the silo block (s) to its operating position or to its transport position is obtained by means of jack (s) which is (are) carried by the conveyor and rest on it for

toggle the block.

  In preferred embodiments, the batching plant still has one or more of the following features: the block of silo (s) is maintained in the service position by crutches which bear on the frame which carries the bowl; the frame which carries the mixing bowl is mounted on a retractable support, preferably a support movable vertically between a high transport position and a low service position; the frame has at least one part which is cantilevered at the rear of the conveyor and the mixing bowl is in line with this part; the frame support carrying the bowl is cantilevered at the rear of the carrier; the silo block (s) is secured to a frame which extends the block towards the mixing bowl and which forms a pivotally articulated clevis on the frame which carries the bowl; the conveyor has a raised front portion adapted to rest on a tractor system and the silo block (s) has one end set back from the rest of the block so that in transport position this end rests on the raised portion of the conveyor; the silo block (es) comprises a central silo, which, in the transport position, rests on a portion of the conveyor and two lateral silos which, in the transport position, project laterally over the conveyor along the central silo, the conveyor being embedded between the side blocks; the silo block (s) comprises means constituting two lateral points of temporary anchoring for the articulation of the block to the tilt cylinders; the carrier comprises at the rear a transverse beam which projects laterally and on which are articulated the tilt cylinders and this beam comprises retractable extensions which carry hydraulic crutches;

  the transporter is a hydraulic suspension semitrailer.

  An example embodiment of a concrete plant will be described below.

  and a transport vehicle according to the invention, the description and the

  Figures showing the features of the invention.

  In the figures: Figure 1 is a side view of the power station in the operating position; Figure 2 is an end view of the plant of Figure 1 Figure 3 is a separate view of the silo block in the transport position; Figure 4 is a top view of the block of Figure 3; Figure 5 is a cross-section of the silo block; Figure 6 is an enlarged end view of the silo block; Figure 7 is a side view of a semitrailer used to transport the plant; FIG. 8 is a half-view from above of the semitrailer; FIG. 9 is a side view of the power station on the semitrailer in the transport position, and

  Figs. 10 (A) through 10 (F) are side views of the semi-

  trailer and the concrete plant during successive phases of the

  setting up the plant at its place of use.

  FIGS. 1 and 2 show essentially the frame 1 of the power station that carries the mixing bowl 2 and the block 3 of the silos mounted at

  pivoting on frame 1 about a horizontal axis 4.

  In FIGS. 1 and 2, the block of silos is held in a vertical service position by crutches 5, 6 which rest on the frame 1. Any other suitable means could be used: for example one or more jacks, keys, etc. . The frame 1 is supported by supports 7 by means of feet 8 and

crutches 9 retractable.

  In this example, the mixing bowl is of the type rotated about a horizontal axis, but the invention also applies to a vertical fixed bowl provided with an internal mixing system or any other bowl of

mixing, fixed or rotary.

  The plant comprises on the frame 1 conventional means for rotating the bowl and for feeding it with the constituents of the concrete mix. These means have only been schematized or omitted so as not to weigh down the figures because they are well known to the customer. man of

  and the present invention does not relate to these known accessories.

  The silo block has been shown separately and schematically on

  Figures 3 to 6, where it is seen horizontally in the transport position.

  In this embodiment, it comprises, according to the invention, a central silo G between two lateral silos G 2, G 3, 10,11 means (hoppers and screw conveyors) to control the extraction of the contents of the silos and a frame 12 in the form of a clevis which defines the pivot axis 4 The silos have, in a known manner, filling and emptying holes,

  manholes, etc. that were not represented.

  In this embodiment, the lateral silos G 2, G 3 are longer than the central silo G 1 (FIG. 4) and the central silo is set back relative to the lateral silos so as to provide a space on one side of the silo block.

  in which will be partially embedded the carrier.

  In FIG. 6, which shows an end view of the block of silos in a horizontal position (this end view being a view from below when the block is in a vertical service position), the line of the axis is shown on the left. articulation 4 of the yoke 12 of the block to the chassis I (not shown), but this line does not appear on the right because the yoke 12 has not been shown on the half-view on the right is represented on the half a right-hand view of the bearings 23 which define an axis 13 parallel to the axis 4 and which are intended for the articulation to the block of the rod of a rock tilt control cylinder; there are such bearings on each side of the block but

  they were omitted on the left half-view.

  According to a feature of the invention (FIGS. 1, 2, 6), the horizontal axis 4 of articulation of the block to the frame is located in a plane which is substantially the vertical median plane of the block when the block is vertical and it is located substantially at the lower end of the block when the block is vertical, and the axis of articulation 13 of the block to the tilt cylinders is located higher than the axis 4 of articulation to the frame, substantially in the upper part of the clevis 12 while the axis 4 is in the lower part (when the block is in the vertical position) and it is in front of the axis 4 in the

  direction of tilting of the block towards the vertical.

  The conveyor is shown in Figure 7.

  This is, in this example, and preferably, a semitrailer hydraulic suspension 14 coupled to a tractor 15,

way in itself known.

  The conveyor 14 comprises a frame 16 which provides a rear support 16 A above the rear axle 17, a central support 16 B and a

  front support 16 C above the tractor platform 15.

  The central support 16 B is at a lower level than those of the front support 16 C and the rear support 16 A. The rear support comprises a transverse beam 18 on which are articulated two lateral cylinders 19 and which has a retractable extension 20 provided with crutches 21 (Figures 7 and 8) Crutches 22 are also provided at the front end of the central support 16 B. For transport, the silo block is extended horizontally on the central and front supports 16 B, 16 C while the frame of the central unit is partly on the rear support 16 A and partly cantilevered

(Figure 9).

  In Figure 9, the central support 16 B is not visible because it is embedded between the lateral silos (Figures 5 and 6) and thus hidden by these

last.

  It will be noted that the chassis 1 of the power plant is, during the

  transport, in its natural position to carry the bowl 2.

  During transport, the plant is maintained by the cylinders 19 which constitute two lateral connections between the silo block 3 and the conveyor. The silo block 3 comprises for this purpose lateral bearings 23 in which the ends of the rods are detachably articulated. jacks (Figure 9) The maintenance of the plant can still be provided by any other conventional means, for example by keys, by hydraulic jaws, etc.. Figures 10 illustrate the operations of removal and implementation

  of the power plant on its operating site.

  Fig IOA: the semi-trailer is raised at the rear by action on the hydraulic suspension to be able to deploy the support 7 of the chassis 1 of the power station and the crutches 21 and 22 (after exit of the lateral extensions 20)

  went down to horizontal the whole.

  Fig l OB: the hydraulic suspension is deflated to allow the descent of the assembly using crutches, and the support 7 comes to touch

floor.

  Fig IOC: the silo block is then gradually raised by means of

  jacks 19 to a vertical position.

  Fig 1 OD: we hang the raised block 3 to the chassis 1 of the power plant

average crutches 5 and 6.

  Fig 1 OE: the cylinders 19 are unhooked from the block 3 and the frame 1 of the

  central is detached from the semi-trailer.

  Fig 1 OF: the crutches 21 and 22 are raised so that the trailer lowers and falls lower than the transport position because the

  suspension is deflated, and the trailer can be unobstructed.

  The invention is not limited to the embodiment which has been described.

  In a simpler variant, for example, the silo block

  has only one or two silos.

  In a simpler variant also, the platform of the

  carrier has only one or two levels of support.

  In variants, the tilt cylinders act on the block

  of silos via a transmission.

  In variants, the tilt cylinders are supported on the

  chassis of the plant instead of taking support on the carrier.

  A typical example of a transportable concrete plant according to the invention is a plant whose bowl is designed to mix about 1 m 3 of concrete, the block of silos having a width of about 3 m and a height of about 8 m and preferably comprising at least two cement silos, optionally a silo for a granular adjuvant, for example

fly ash.

Claims (19)

  Concrete mixing plant comprising a frame (1) which carries a mixing bowl (2) and one or more silos for containing one or more of the constituents of the concrete mix, characterized in that the silo or silos constitute a block (3) pivotally mounted on said frame (1) of the unit to be able to switch from a transport position to a service position, retractable means (5, 6) being provided to hold the block in the service position.   Concrete plant according to claim 1, characterized in that the block (3) is pivotally mounted on the frame (1) of the central unit about an axis (4) which is substantially in the vertical median plane of the block.   when the latter is in the service position.   Concrete plant according to claim 1 or 2, characterized in that the block (3) is pivotally mounted on the frame (1) about an axis (4) which is in the lower part of the block when the latter is in position on duty.   Concrete plant according to one of Claims 1 to 3, characterized   in that the block comprises means (23) which define an axis   hinge (13) for a control system of the tilting of the block.   Concrete batching plant according to claim 4, characterized in that said hinge pin (13) is located substantially under the silo or silos (G 1, Gj 2, 3) of the block (3), above the axis (4) of articulation of the block chassis (1) of the plant.   Concrete plant according to one of Claims 1 to 5, characterized   in that the block comprises a frame (12) which is substantially under the silo or silos of the block when the latter is in the service position and this frame constitutes a yoke of articulation of the block to the frame (1) of the power plant.   Concrete plant according to one of Claims 1 to 5, characterized   in that the block comprises a frame (12) which is under the silos of the block when the latter is in the service position and this frame is articulated in the lower part to the frame (1) of the power station and is articulated   in the upper part to a control system of the tilting of the block.   Concrete batching plant according to one of the preceding claims,   characterized in that said block comprises a central silo (G 1) between two lateral silos (G 2, G 3) which are longer than the central silo, the central silo being set back with respect to the lateral silos so as to side of the block a space (13) in which can be partially embedded a carrier.   Concrete plant according to one of the preceding claims,   characterized in that said block (3) comprises means (10, 11) for   order the extraction of the contents of the silos.   Concrete plant according to one of Claims 1 to 9, characterized   in that the silo or silos of the block (3) are shaped with a withdrawal in the upper part to be able to rest substantially horizontally on a   carrier with two levels of support.   Concrete plant according to one of the preceding claims,   characterized in that said block (3) is, in the service position, held by crutches (5,6) which bear on said frame (1) of the central.   Concrete plant according to one of the preceding claims,   characterized in that said frame (1) of the power plant is mounted on a retractable support (7).   Concrete batching plant according to Claim 12, characterized in that the support (7) of the frame (1) can be moved vertically between a   high transport position and a low service position.   14 Device for transporting a concrete plant according to one of the   Claims 1 to 13, characterized in that it comprises a conveyor (14)   adapted to receive said block (3) in a substantially horizontal position and the   frame (1) carrying the bowl (2) in its normal position.   Device according to Claim 14, characterized in that the conveyor (14) carries actuating cylinders (19) for tilting said   block (3) from its transport position to its service position and vice versa.   Device according to claim 15, characterized in that the conveyor comprises at the rear a transverse beam (18) on which   are articulated said tilt cylinders (19).   Device according to claim 16, characterized in that said transverse beam (18) has retractable extensions (20) which   carry hydraulic crutches (21).   Apparatus according to one of claims 14 to 17, characterized in that   that the conveyor is such that in transport position the mixing bowl (2) is located at a portion of the frame (1) of the power plant which is located   cantilevered at the rear of the conveyor (14).   Device according to one of Claims 14 to 18, characterized in that   the conveyor (14) is partially embedded in said block (3).   Device according to one of Claims 14 to 19, characterized in that   the carrier provides a rear support (16A) above the rear axle (17), a central support (16B) and a front support (16C), the central support (16B) being at a level below that of the front support (16 C) and the block (3) of silo (s) comprising a recess at its upper end, in   so that during transport the block of silo (s) is extended horizontally   on the central and front supports (16 B, 16 C) while the power plant chassis is partially on the rear support (16 A) and partly cantilevered.