FR3111517A1 - Suction module and associated trailer - Google Patents

Abstract

The invention relates to a suction module for a trailer comprising a chimney provided with a suction unit (12) for routing a product in the chimney, the chimney comprising a suction column (11) one end of which base is connected to an outlet of the suction block, the suction column being provided with a flap (16) ensuring in service the separation of a flow carrying the product into a first flow which can thus circulate in the column suction and a second flow, the suction column being provided with at least one discharge conduit for the discharge of the second flow out of the suction module and the trailer. The invention also relates to a trailer equipped with such a module. FIGURE OF THE ABRIDGE: Fig. 6

Description

Suction module and associated trailer

The invention relates to a suction module as well as a trailer equipped with such a suction module.

TECHNOLOGICAL BACKGROUND OF THE INVENTION

In the agricultural field, trailers equipped with a suction module are known, usually comprising a suction column and an expulsion portion, making it possible to suck up a product from the ground in order to dump it into the trailer.

In order to ensure the circulation of the product in the suction module, the latter is equipped with a suction block comprising a pump.

OBJECT OF THE INVENTION

An object of the invention is to provide a more sophisticated suction module.

To this end, the subject of the invention is a suction module for a trailer comprising a chimney provided with a suction unit for the routing of a product in the chimney, the chimney comprising a suction column, one end of which base is connected to an outlet of the suction unit, the suction column being provided with a flap ensuring in service the separation of a flow carrying the product into a first flow which can thus circulate in the suction column and a second flow, the suction column being provided with at least one evacuation duct for the evacuation of the second flow out of the suction module and of the trailer.

In this way, the flap makes it possible to separate the flow into two flows, one of which is mainly loaded with product. The separation therefore takes place within the suction module itself, which facilitates the transport of the product to the trailer.

Of course, throughout this application, the terms "upper", "lower", "front", "rear" ... must be understood according to the position in service of the suction module, that is to say the position in which the module is arranged in a trailer, said trailer then resting on the ground on which it is intended to roll. The terms "front", "rear" must therefore be understood according to the position in service of the trailer and the direction of travel of the trailer on said ground when it is towed by a motorized vehicle.

Preferably, the chimney further comprises an expulsion portion extending the suction column.

Preferably the expulsion portion comprises a main wall which is curved.

Preferably the shutter is arranged in the suction column so that the lower end of the shutter is level with the outlet of the suction block.

Preferably the flap is arranged in the suction column so as to separate the flow into a first forward flow and a second backward flow.

Preferably the flap comprises at least one side which is arranged vertically in the suction column.

Preferably, the shutter is movably mounted in the suction column.

Preferably the flap can be advanced or retracted in the suction column.

Preferably the flap is extended above by a deflector.

Preferably the deflector comprises a base attachment to the shutter and a screen which is inclined vis-à-vis the base attachment.

Preferably, the evacuation duct comprises at least two chutes arranged symmetrically in the suction module, one of the chutes being associated with the right side of the suction module and the other being associated with the left side of the suction module .

Preferably at least one of the chutes forms an elbow.

The invention also relates to a trailer comprising a module as mentioned above.

Preferably, the trailer comprises means for distributing the product in the body of the trailer, said means comprising for this purpose at least one wall for guiding a flow carrying the product towards a side of the trailer body substantially opposite to that associated with exit from the chimney.

Preferably the expulsion portion comprises a main wall which is curved and which thus forms a wall for guiding the flow.

Preferably, the flow guide wall is integral with the roof.

Preferably, the guide wall forms part of a guide passage for the distribution means.

Preferably, the guide channel has a bottom extended on either side by two borders.

Preferably, the guide wall forms an arch extending the chimney.

Preferably the arch forms a quarter circle.

Preferably the headband is flexible.

Preferably, the hoop forms a junction between the chimney and the guide wall secured to the roof.

Other characteristics and advantages of the invention will become apparent on reading the following description of a particular non-limiting embodiment of the invention.

DESCRIPTION OF FIGURES

The invention will be better understood in the light of the following description with reference to the figures of the appended drawings, among which:

Figure 1 is a simplified perspective view of a trailer in longitudinal section equipped with a suction module according to a particular embodiment of the invention,

Figure 2 is a simplified perspective view of the suction module of the trailer shown in Figure 1,

Figure 3 is a simplified bottom view of the suction module shown in Figure 2,

Figure 4 is a simplified sectional view of the suction module illustrated in Figure 2 according to a first vertical sectional plane,

Figure 5 is a simplified sectional view of the suction module illustrated in Figure 2 according to a second vertical sectional plane,

Figure 6 schematically illustrates the circulation of air in the suction module shown in Figure 2,

Figure 7 schematically illustrates the circulation of air in the trailer shown in Figure 1.

DETAILED DESCRIPTION OF A PARTICULAR EMBODIMENT OF THE INVENTION

Referring to Figure 1, the trailer according to a particular embodiment of the invention, generally designated at 1, comprises a frame 2 and a trailer body 3 which is mounted on the frame 2 and which extends longitudinally along a axis X. The trailer 1 is here connected to a motorized vehicle such as a tractor (not illustrated here).

In particular, the trailer body 3 comprises a horizontal bottom extended laterally by two vertical lateral flanks, ie a left lateral flank and a right lateral flank (when driving the tractor). The trailer body 3 also comprises a carpet 5 arranged on the bottom of the trailer body 3 ensuring movement of the product contained in the trailer 1 towards the rear or the front of the trailer body 3. The trailer 1 is thus called “moving floor”.

The carpet 5 comprises for example strips interconnected by chains. The belt 5 can optionally be actuated by a geared motor or else by a single motor.

The front part of the trailer body 3 is closed here by a suction module 4 making it possible to suck up a product (such as cultivation or grinding waste of the plant type or in general any other product which can be sucked up; for example chaff, fodder, manure, fodder that has undergone silage, etc.).

Furthermore, the front part of the trailer body 3 comprises a front side 6 arranged between the suction module 4 and the carpet 5. The front side is typically inclined (that is to say neither vertical nor horizontal) vis- vis-a-vis the side flanks and extends from the bottom in the direction of the suction module 4 so as to cover the suction module with the exception of a portion of expulsion of said suction module 4 which will be detailed below.

The suction module 4 is thus arranged in the trailer 1 between the front side 6 and an attachment 7 of the trailer 1 to the motorized vehicle.

Preferably, the suction module 4 is arranged in a removable manner on the chassis 2 in order to be able to allow the trailer 1 to be equipped if necessary with another module or to be able to use the trailer 1 without a module.

For example, the suction module 4 is fixed to the rails of the trailer 1 by a screw assembly.

The trailer 1 can thus be used for many different tasks. The trailer 1 can for example allow the transport of products that can be sucked up, bulk products (wooden chips, etc.) or larger products (such as pallets, “bigbag” type bags, etc.). As a replacement or in addition to the aforementioned suction module 4, it is possible, for example, to temporarily add to the trailer 1 a module for picking up the fodder.

Furthermore, the rear part of the trailer body 3 is closed by a door 8 which can be opened to temporarily allow access to the interior of the trailer 1 through said open rear part.

The opening and closing of the door 8 is ensured by hydraulic actuation means comprising for example one or more jacks.

The door 8 is optionally in two parts which move away from each other to allow access to the interior of the trailer body 3 and which approach each other to close the trailer body 3.

Furthermore, the trailer 1 comprises one or more extensions 9 (only part of which is referenced here), which may be removable, to increase the volume of the trailer body 3. The extensions 9 are potentially mounted sliding on the trailer body 3 and/or or the door 8 and/or the front side 6 so that it can be lowered or raised to increase the volume of the trailer body 3.

The trailer body 3 here also comprises a roof 10 covering at least part of the trailer body 3. In the present case, the roof 10 is arranged to extend from the door to the suction module 4 so as to cover the suction module 4.

Preferably, the roof 10 can be lowered (for example via the risers 9) in order to be able to compress the product present in the trailer 1 to gain product storage volume.

The roof 10 is preferably perforated.

We will now detail the suction module 4 with reference to all the figures.

The suction module 4 comprises a chimney comprising a suction column 11 whose lower end is connected to an outlet of a suction block 12 of said module. The suction block 12 is thus arranged in the lower section of the chimney while the suction column 11 forms a middle section of the chimney.

The suction unit 12 comprises at least one pump and preferably at least two pumps. In the present case, the suction block 12 comprises two pumps arranged so that their axis of rotation is each parallel to the axis X. The pumps are preferably centrifugal pumps.

The two pumps are thus mounted in parallel, one next to the other in the lower section of the chimney.

More specifically here, the two pumps are arranged so that their respective scrolls open into a common discharge outlet 14 which itself opens into the lower end of the suction column 11.

The suction module 4 also includes a follower foot 13 which is mounted at the rear of the suction block 12 and the suction column 11.

In a manner known per se, the follower foot 13 facilitates the suction of the product from the ground to the suction block by creating a suction tunnel between the ground and said suction block 12 (the air circulating through the follower foot 13 so as to emerge at the upper end of the follower foot 13 substantially opposite the inlet of the two pumps).

Furthermore, the follower foot 13 is movably mounted on the chimney. More specifically here, the follower foot 13 is slidably mounted on the chimney. Typically, the follower foot 13 slides along rails 15 integral with the chimney.

Said follower foot 13 is generally shaped like a prism with a first substantially vertical main face opposite the suction column 11 and a second inclined opposite main face extending from the top of the follower foot 13 towards the ground.

The follower foot 13 is preferably shaped so as to have a base 17 which is here widened vis-à-vis the rest of the follower foot 13.

This makes it possible to improve the suction of air from the ground and its guidance to the suction block 12.

As more visible in Figure 3, at least the base 17 of the follower foot 13 is hollow and is provided with threshing means arranged inside thereof.

The threshing means comprise, for example, at least one beam 18 mounted to move relative to the base 17 in order to be able to rub, for example, vegetation and/or waste to participate in the detachment of the product to be sucked up. For example the flail 18 can come and rub the stubble to take off the chaff.

The beam 18 can be motorized or not.

The beam 18 here comprises a main rod extending between the two right and left side flanks of the base 17 along an axis A. The beam 18 is carried at its two ends by arms, each of the arms being articulated on one respective of said right and left side flanks along an axis A' parallel to axis A. Beam 18 can thus perform a pendulum movement inside base 17 around said axis A'. Preferably, in its lowest position, the main rod is substantially level with the underside of the base 17.

The follower foot 13 is also mounted on one or more rollers 19 for its movement on the ground. The follower foot 13 here has four wheels 19.

According to a particular embodiment, the rollers 19 are carried by two left and right lateral arms 20 solarized respectively to the left and right sides of the follower foot 13. Each arm 20 is here pivotally mounted, substantially at its center, on respectively one on the left and right sides of the follower foot 13 along an axis transverse to the suction module 4.

Preferably, the follower foot 13 here forms a shutter of the suction unit. To this end, the follower foot 13 is also mounted to move relative to the chimney between a low position (corresponding to a neutral position of the shutter) and a high position (corresponding to a service position of the shutter) in which the follower foot 13 at least partly obstructs the entrance to the push-ups.

It is of course necessary to distinguish the small uncontrolled movements of the following foot 13 allowing it to follow the reliefs of the ground, from the large controlled movement of the following foot 13 between its low position and its high position allowing the following foot 13 to be able to rise sufficiently to obstruct at least partly the inlet of the pumps.

In the present case, the follower foot 13 is arranged so that in the low position it rests on the ground via its rollers 19 and that in the high position it extends substantially at the height of the push-ups. The follower foot 13 then extends more precisely at the level of the rotors of the two pumps, greatly limiting the quantity of air that can be sucked in by the two rotors.

Preferably, the height of the follower foot 13 is equal to or greater than the height of the assembly formed by the two rotors of the two pumps. Subsequently the term "height" is to be considered along a vertical Z axis which is orthogonal to the X axis.

Furthermore, the width of the follower foot 13 is equal to or greater than the width of the assembly formed by the two rotors of the two pumps. Subsequently the term "width" is to be considered along a Y axis which is orthogonal to the X axis and to the Z axis. In particular, the A axis is parallel to said Y axis as well as the d axis. articulation of the arms 20.

In this way, when the follower foot 13 is in its high position, the follower foot 13 protrudes from the assembly formed by the two rotors in height (on both sides of the assembly) and in width (on both sides of the whole) which makes it possible to very well block the quantity of air which can be sucked in by the two rotors.

The suction module 4 also comprises means for actuating the follower foot 13 in order to cause the movement of the follower foot 13 between its two high and low positions. To this end, the actuating means here comprise at least one actuator 33 whose body is integral with the chimney and whose rod is integral with the follower foot 13. The actuator 33 is thus arranged so that the extension of the rod causes a lowering of the follower foot 13 and the retraction of the cylinder 33 a rise of the follower foot 13.

In this way, when the suction module 4 starts, the follower foot 13 is in its high position or brought into its high position.

This limits the amount of air sucked in by the suction unit, allowing the pumps to be commissioned more quickly.

The follower foot 13 is then lowered into its low position to leave free the entry of the push-ups.

Advantageously, the follower foot 13 can also be arranged in its high position for other applications, in particular when storing the trailer 1 or transporting the trailer 1 empty.

As indicated above, the chimney comprises a suction column 11 which here extends substantially vertically along the Z axis.

It is noted that the suction module does not protrude in height from the front side: in this way the potential lowering of the roof 10 is not hindered by said module.

Furthermore, the suction column 11 is extended by an expulsion portion 21 of the chimney which has already been mentioned. The front side 6 thus comprises an opening 22 to allow the passage of the expulsion portion 21 through said front side and thus allow the discharge of a product from the ground into the trailer body 3. The expulsion portion 21 is thus of course open towards the rear of the trailer 1 towards the inside of the trailer body 3.

The expulsion portion 21 thus forms the upper section of the chimney.

Preferably, said expulsion portion 21 is curved towards the inside of the trailer body 3. The curvature of the expulsion portion facilitates the injection of the product towards the bottom of the trailer body 3.

As more visible in Figure 5, the suction module 4 comprises a flap 16 arranged in the suction column 11 to ensure the separation of an air flow carrying the product into two flows, one being more charged than the other product.

The shutter 16 is preferably arranged in the suction column 11 so that the lower end of said shutter is level with the lower end of the suction column 11. In this way the lower end of the shutter 16 is at the level of the common discharge outlet 14 which makes it possible to separate the flow into two flows as soon as it leaves the suction unit 12.

The flap 16 is here arranged in the suction column 11 so as to separate the flow 30 into a front flow 31 and a rear flow 32.

To this end, the flap 16 comprises a main section which is arranged substantially vertically in the suction column 11. Said section also extends between the two right and left side flanks of the suction column 11 so in cutting said suction column 11 into two channels: the front channel which starts from the suction block 12 to circulate over the entire height of the suction column 11 and in which flows the front flow 31 and the channel rear in which flows the rear flow 32.

In this way, advantage is taken of the fact that the product sucked in tends to press against the bottom of the rotors before being expelled from the pumps so that the majority of the product is in the front part of the flow 30 when it is projected out of the suction unit 12: the flap 16 therefore makes it possible to separate the air flow into the front flow 31 comprising the majority of the product and circulating in the front channel and the rear flow 32 comprising a minority of the product and circulating in the rear channel.

According to a particular embodiment, the flap 16 is movably mounted in the suction column 11 in order to reduce or enlarge the section of the rear channel and of the front channel. Typically the flap 16 is mounted movable in translation in the suction column 11 along an axis B (which is here substantially parallel to the axis X) between the two front and rear sides of the suction column 11.

This makes it possible to be able to control the relative position of the shutter 16 with respect to the suction column 11, and therefore the way in which the flow 30 leaving the suction block 12 is split into two, in order to optimize as much as possible the product concentration of the front flow 31 so that the latter comprises a maximum of particles but with the least amount of air possible.

The shutter 16 is for example mounted on slides carried by the left and right sides of the suction column 11.

The actuation of the shutter 16 can be motorized or not.

For example, the actuation of the shutter 16 can be non-motorized and be ensured by a screw-nut assembly 24 allowing the shutter 16 to be moved forward or backward.

Preferably, the suction module 4 includes gripping means 25 allowing an operator to manually move the shutter. The gripping means comprise for example a crank allowing to actuate the screw-nut assembly 24.

Preferably, the flap is extended above by a deflector 26 which is here fixed to the flap 16.

Said deflector 26 is preferably arranged so as to extend (in height) from the flap 16 as far as the expulsion portion 21 and (in width) between the right and left sides of the suction column 11 in the lower part. and the expulsion portion 21 at the top.

Said deflector 26 preferably comprises a base 27 for attachment to the flap 16. The base extends in the extension of the face of the flap 16 and therefore here extends substantially vertically.

The base 27 is extended by a screen 28 which extends in an inclined manner with respect to said base 27. Typically the screen 28 is arranged in the expulsion portion 21 so as to be inclined in the direction of the rear of the trailer body 3. Said screen 28 is for example flat and extends in an inclined plane (that is to say neither parallel nor orthogonal) with respect to the plane in which the base extends 27 and the vertical side of flap 16.

The screen 28 thus makes it possible to reduce the section of the expulsion portion 21.

The screen 28 is preferably flexible.

Optionally, the screen 28 comes to rest against the front side 6 (either below the opening 22 or at the level of the opening 22). Its flexibility thus allows it to follow a possible lowering or a possible raising of the front side 6.

While the front channel extends over the entire height of the suction column 11 and opens into the expulsion portion 21, the rear channel does not extend over the entire height of the suction column 11 but opens in at least one discharge chute to allow the discharge of the rear flow 32 directly outside the trailer 1.

Preferably the rear channel opens into two evacuation chutes 29a, 29b arranged symmetrically in the suction module 4, one of the chutes being associated with the right side of the suction module 4 and the other being associated with the left side of the suction module 4. Thus arranged, the two chutes 29a, 29b surround the follower foot 13 so as to emerge on each side of said follower foot 13 when the latter is in its raised position.

Each chute 29a, 29b therefore forms an elbow with a first arm of the elbow extending transversely in the suction module 4 between substantially the middle of the suction module and one of the respective sides of the module (the first arms thus extending parallel to the Y axis) and the second arm of the elbow extending parallel to the X axis to emerge outside the trailer 1. The first two arms are connected to each other and to the rear channel. Furthermore, each chute 29a, 29b is arranged so that its outlet opens under the front side and is directed towards the rear of the trailer 1.

In operation, the pumps suck in the air laden with a product and reject it into the suction column 11 where the shutter 16 separates the air flow 30 into two. The rear flow 32 is evacuated via the two chutes 29a, 29b under the trailer 1 while the front flow is evacuated into the trailer body 3 via the suction column 11 and the expulsion portion 21. At the outlet of the expulsion portion 21, the heavier-than-air product transporting it then falls into the trailer body 3. Advantageously, the perforations in the roof 10 facilitate the evacuation of the air from the trailer 1 while trapping the product in the trailer 1.

According to a preferred embodiment, the trailer 1 comprises means for distributing the product in the body of the trailer 3 in order to optimize the distribution of the product sucked into the trailer.

Said means comprise for this purpose at least one wall for guiding the forward flow towards a side of the trailer body 3 substantially opposite to that associated with the outlet of the chimney, or here to that associated with the outlet of the expulsion portion 21 which here is the front side 6. Consequently said means comprise in the present case at least one wall for guiding the front flow 31 towards the rear side of the trailer body 3 or here the door 8.

Preferably, said means comprise a main front wall 23 which forms part of the expulsion portion. Said front wall 23 is curved towards the interior of the trailer body 3 so as to form an arc of a circle.

Preferably at least said front wall 23 is flexible.

In the present case, the screen 28 is therefore itself part of the distribution means (as a guide wall) since the screen closes the expulsion portion 21 below, forming with the front wall 23 of the expulsion portion 21 a path for discharging the product from the suction module 4. It is also noted that the two lateral flanks of the expulsion portion bordering the main front wall 23 participate in this guidance and therefore also form part here of said distribution means ( as a guide wall).

According to a preferred embodiment, the distribution means also comprise a channel 40 for guiding the front flow 31 towards the rear of the trailer 1.

Said guide corridor 40 is here secured to the roof 10. The guide corridor 40 extends substantially straight. Said guide corridor 40 is here centered (along the Y axis) with respect to the roof 10. Furthermore the guide corridor 40 extends parallel to the X axis.

The guide passage 40 here has a bottom (forming a guide wall) arranged against the roof 10 (solid bottom unlike the roof 10 which is perforated here), bottom extended longitudinally on either side over its entire length (considered according to the X axis) by two borders.

The guide channel 40 thus has a section in the form of a tray and for example in the form of a tray with a flat bottom.

The guide corridor 40 is here of a length (considered along the X axis) and a width (considered along the Y axis) less important than that of the roof 10. Nevertheless the guide corridor 40 has a length at least equal to 60% of that of the roof 10 and preferably at least equal to 75% of that of the roof 10.

The guide channel 40 thus makes it possible to evenly distribute the product over the entire length of the trailer body 3.

Preferably, the distribution means also comprise a hoop 41 connecting the expulsion portion 21 to the guide passage 40.

Typically the hoop 41 is connected at a first end to the front end of the guide passage 40 and at a second end to the free end of the expulsion portion 21.

The hoop 41 also has a bottom forming a junction (and therefore a guide wall) between the bottom of the guide passage 40 and the front wall 23 of the expulsion portion 21. In this way, the expulsion portion 21, the the arch 41 and the guide passage 40 form a continuous channel facilitating the guiding of the front flow 31 towards the rear of the trailer 1.

The bottom of the hoop 41 is preferably also bordered by two edges.

Furthermore, the hoop 41 is here curved towards the inside of the trailer body 3 so as to form an arc of a circle between the expulsion portion 21 and the guide passage 40. The hoop 41 here is shaped like a quarter circle.

The arch 41 is preferably flexible in order to be able to follow the lowering of the roof 10 via the risers if necessary.

Thanks to the cooperation of the suction module 4 with the hoop 41 and the guide channel 40, the filling of the trailer 1 therefore begins with the rear of the trailer 1. Indeed, the forward flow guided by the portion of expulsion 21, the hoop 41 and the guide channel 40 will mainly strike the rear of the trailer 1. If product has already been deposited at this location, it will then disperse towards the front of the trailer 1 which will fill it evenly.

Of course, the invention is not limited to the embodiment described and variant embodiments can be added thereto without departing from the scope of the invention as defined by the claims.

Although here the trailer is attached to a motorized vehicle, the trailer can be directly motorized, a driving position then being arranged at the front of the trailer.

The suction module may be different from what has been indicated. In particular, although here the trailing foot is secured to the chimney, the trailing foot may be secured to another part of the trailer such as for example the chassis or the body of the trailer, the suction module then being in two or several distinct elements.

The suction block may be different from what has been indicated. It will thus be possible to have a different number of pumps and for example a single pump.

The suction module may not include a follower foot or may include a follower foot which is fixed vis-à-vis the suction column or may include a follower foot which is mobile according to small movements to follow the reliefs of the ground without however being mobile to the point of being able to obstruct at least partially the entry of the pumps.

Furthermore, although here the follower foot is shaped to at least partially obstruct the inlet of the suction unit, the suction module may include a shutter other than the follower foot, such as a panel mounted movable relative to the suction block to be able in service to at least partially obstruct the entrance to the suction block. This panel can for example be mounted sliding, pivoting or according to any other movement on the suction module or on another part of the trailer than the suction module.

The chimney of the suction module may have a different shape from what has been described.

The flap may not be movably mounted in the suction module and thus be fixed in the suction column. Furthermore, although here the orientation of the shutter is done manually, the orientation of the shutter can be ensured by other dedicated actuation means such as for example a motor or hydraulically (for example by a jack). Although here the flap is orientable by translation, the flap may be orientable by rotation or any other movement.

The flap may have a shape other than that described. The flap may not be associated with a deflector. This may also have a shape other than that described.

The trailer may have only the corridor or only the arch (and not both) or it may have neither corridor nor arch.

Claims (14)

Suction module for trailer comprising a chimney provided with a suction block (12) for routing a product through the chimney, the suction module being characterized in that the chimney comprises a suction column ( 11) whose lower end is connected to an outlet of the suction unit, the suction column being provided with a flap (16) ensuring in service the separation of a flow carrying the product into a first flow (31) which can thus circulate in the suction column and a second flow (32), the suction column being provided with at least one evacuation conduit for the evacuation of the second flow out of the suction module and of the trailer. Module according to claim 1, in which the chimney further comprises an expulsion portion (21) extending the suction column (11). Module according to Claim 2, in which the expulsion portion (21) comprises a main wall (23) which is curved. Module according to one of the preceding claims, in which the flap (16) is arranged in the suction column (11) such that the lower end of the flap is level with the outlet of the suction block (12) . Module according to one of the preceding claims, in which the shutter (16) is arranged in the suction column so as to separate the flow into a first forward flow and a second backward flow. Module according to one of the preceding claims, in which the flap (16) has at least one side which is arranged vertically in the suction column. Module according to one of the preceding claims, in which the flap (16) is movably mounted in the suction column. Module according to Claim 7, in which the flap (16) can be advanced or retracted in the suction column. Module according to one of the preceding claims, in which the flap (16) is extended above by a deflector (26). Module according to claim 9, in which the deflector comprises a base (27) for attachment to the flap and a screen (28) which is inclined with respect to the base for attachment. Module according to one of the preceding claims, in which the evacuation duct comprises at least two chutes (29a, 29b) arranged symmetrically in the suction module, one of the chutes being associated with the right side of the suction module and the other being associated with the left side of the suction module. Module according to Claim 11, in which at least one of the chutes forms an elbow. Trailer comprising a module according to one of the preceding claims. Trailer according to claim 13, comprising means for distributing the product in the body of the trailer, said means comprising for this purpose at least one wall for guiding a flow carrying the product towards a side of the trailer body substantially opposite that associated with the chimney outlet..