FR2862488A1 - Flushing tank for livestock building hydraulic cleaning system has whole-length opening system for rapid water discharge - Google Patents

Abstract

The tank (6), made from panels, has outlet along its whole length controlled by inflatable roll positioned beneath its base panel, which is sealed to lower edges of vertical walls by compressible joints. The deflation of the roll allows the base panel to open and discharge water through its outlet, flushing slurry into temporary storage tank (8) with a pump (12) at the other end of building (1). The tank (6), made from panels of polymer or cement resistant to organic acids, has outlet along its whole length controlled by inflatable roll positioned beneath its base panel, which is sealed to lower edges of vertical walls by compressible joints. The deflation of the roll allows the base panel to open and discharge water through its outlet, which is about 10 cm high and several meters long, flushing the slurry into a temporary storage tank (8) with a pump (12) at the other end of the building (1).

Description

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  LAUNDRY TANK FOR HYDROCURING INSTALLATION, HYDROCURING INSTALLATION COMPRISING SAID TANK AND LIVESTOCK

INCLUDING SUCH INSTALLATION

  The invention relates to a device for flushing, or flush, for livestock facilities, in particular cattle or pigs.

  The manure usually accumulated in the pits or pre-pits located under the pigs is at the origin of a degradation of the ambient air of the breeding rooms. It is also a preferred medium for many pathogens that are directly under the animals.

  1 o The complete evacuation of the manure, the washing and the disinfection of the prefosses are operations technically difficult, even dangerous for the human health.

  Animals such as pigs or cows are frequently housed in huts or stables with a perforated floor type grating. This floor usually rests on a pit, the excrement being evacuated in this pit. The accumulation of faeces under the grating leads to the production of large quantities of ammonia, the ammonia emanations having in the long run a detrimental influence on the health of the animals or even the farmer.

  To solve this problem, it is already known, in the prior art, scraping systems as described for example in the document FR-2.738. 457.

  Scraping is used in many Quebec farms. The establishment and maintenance of these scraping systems is complex and expensive. As an indication, in France, more than 20% of the total area of 17 million square meters of pig farm is on grating, very few facilities are equipped with this system of evacuation of manure. The cost of renovation is decisive, this cost being correlated with the price of pork.

  The document FR-2.650.152 published in 1991 describes a device for cleaning the animal travel areas, this device employing a flow of a water-slurry mixture from a reserve located at height. More precisely, the water-slurry mixture contained in a tank is discharged via a large-diameter fast opening valve into a large-diameter pipe, the water-slurry mixture flowing over the animal's travel area. , in slight slope, towards a reserve placed below. A pump immersed in this reserve, preferably choppy, returns the mixture water-slurry in the tank placed in height.

  The device described in this document FR-2.650.152 has many disadvantages.

  First, there are dead zones on either side of the 1 o outlet of the large diameter pipe, so that the droppings remain accumulated on a portion of the surface to be cleaned.

  Secondly, as indicated in this prior document, the water-slurry mixture thickens as and when used and must be applied periodically, for example in grassland or cultivated plots.

  If the user removes the water-slurry mixture from the installation, to spread it, he will have to reintroduce into the tank placed in height a large quantity of water so that the cleaning of the animal's range is possible. . The installation described in this prior document therefore entails a significant consumption of water.

  Third, decantation in the upstream reservoir, placed in height, can cause clogging and less washing efficiency when opening the valve.

  Fourthly, the decantation in the downstream reservoir causes great efforts for the pump immersed in this reservoir, this earlier document representing the pump placed very little above the bottom wall of the downstream reservoir.

  Finally, in case of malfunction of the valve, the repair work will be complicated and unpleasant. The organic acids contained in the droppings require the use of materials highly resistant to corrosion both for the manufacture of tanks and for the piping and the valve, which entails either high costs for the installation when such 2862488 - 3 materials are chosen, ie increased risks of malfunction of the facility if such materials are not used.

  The document WO 94/07358 published in 1994 describes a hydro-massing installation for pig farms, this installation comprising an upstream reservoir placed at height, a downstream recovery pit in which is placed a submerged pump, this submerged pump being connected to an installation. lagooning. The liquid contained in the upstream reservoir flows, through valves, in parallel channels disposed below a perforated soil.

  The device described in this document WO 94/07358 is particularly expensive, particularly in view of the plurality of valves to be put in place: two valves are required for each of the evacuation channels. In case of malfunction of any of these valves, there will be a dead zone in which the droppings will accumulate.

  A comparable installation is described in US Pat. No. 5,732. 658 published in 1998.

  Document FR-2.781.119 published in 2000 proposes a flushing system, this installation does not include any part sensitive to corrosion in contact with the cleaning liquid, namely a clarified manure.

  This device comprises a siphon with priming and defusing means for transferring the clarified manure from a storage tank to gutters arranged approximately in the area of dejection of animals.

  Despite the introduction of a nozzle to increase the ejection speed of the liquid, the installation described in this prior document does not provide a wave effect for the efficient cleaning of manure accumulating under a grating. a pig or cattle farm.

  Reference may be made, as an illustration of the state of the art, to documents FR-2,748,368, FR-2,757,016 and EP-A-0,731,719.

  The aim of the invention is to provide a hydrocuring device for a pig or cattle breeding installation 4 in particular, this device being of economical set-up and maintenance, allowing its installation in renovation without major civil engineering work, this device comprising no parts sensitive to corrosion and being in particular devoid of mechanical valves, electrical or hydraulic requiring a lot of maintenance, this device providing effective cleaning without dead zone of a low slope conventionally placed under a slatted surface or perforated materials equivalent.

  For these purposes, the invention relates, in a first aspect, to a tank 1 o drop for hydro-etching installation, comprising means for opening the tank over substantially a whole length thereof, for rapid emptying .

  According to various embodiments, the tank has the following characters, where appropriate combined: the opening means comprise an inflatable element and means for pressurizing and deflating this inflatable element; the inflatable element is a bead extending substantially the entire length of the bottom wall of the vessel, the bead being placed in a box below said bottom wall; the bottom wall is mounted in loose interlocking with compressible seals against a wall of the tank, this loose interlocking joint with seals defining a joint over substantially the entire length of the tank; the tank is formed by the assembly of panels of polymeric material such as PVC or polyester, or of fiber-reinforced polymer material, or of a hydraulic binder with high resistance to organic acids, such as sulfo-aluminous cement; the bottom wall of the tank comprises at least one valve allowing, by 3o its opening, at least partial deflation of a flange placed under the bottom wall of the tank, thus causing the movement of this wall 2862488 - 5 background and opening the vessel over substantially a full length; the opening of the tank, over a whole length, defined a passage of the order of ten centimeters in height, over an opening length of a few meters, for an internal tank volume greater than two cubic meters.

  According to a second aspect, the invention relates to a hydrocasting installation comprising at least one drop tank as presented above, this installation also comprising a storage tank provided with a pump, this pump being connected to the drop tank by a hose.

  According to various embodiments, the installation has the following characters, if necessary combined: the capacity of the storage tank is at least thirty percent greater than that of the drop tank; the capacity of the storage tank is thirty to forty percent greater than that of the drip tank; the dump tank is equipped with an overflow; the filling pipe of the dropping tank is arranged over most of its length, under a retractable pavement; the bottom wall of the storage tank is sloping on the order of a few percent, the pump being placed in the upper part of this bottom wall; the storage tank is connected via a collector, to a settling tank before spreading; the storage tank is equipped with an overflow connected to a sump.

  According to a third aspect, the invention relates to a rearing room provided with an installation as presented above, in which the storage tank is outside the covered building of the room, the drop tank being placed upstream and over substantially the entire width of a slightly sloping ground under a false slatted floor.

  In one embodiment, the filling pipe of this drop tank 2862488 - 6 is placed over most of its length, under a retractable pavement, in the covered building of the room, in particular laterally to the slatted floor slatted.

  Other aspects and advantages of the invention will become apparent from the following description of embodiments, which description will be made with reference to the accompanying drawings in which: Figure 1 is a top view of an installation according to an embodiment of the invention; Figure 2 is a sectional view along the plane II-II of Figure 1; Figure 3 is a sectional view along the plane III-III of Figure 1; Figure 4 and a side view of a tank container of the type used in the installation of Figures 1 to 3; FIG. 5 is a schematic perspective view of a tank container of the type shown in FIG.

  The installation shown in the figures comprises, under a roof 1, for example two-sided, slatted floor 2, substantially flat and horizontal.

  By grating is meant here slatted panels consist of either a grid of metal blades, or wooden rods assembled grid, or molded plastic material, for example elastomer, or any other equivalent material, grating such as described for example in the documents EP-A-0.853.876, GB-A-2.136.472, EPA-0.396.881, FR-A-2.513.071, FR-A-2.768.302, FR-A-2.675 .175.

  In the embodiment shown, the grating is formed by laying edge-to-edge, on spars 3 of concrete or other similar material, rectangular plates 4 provided with parallel oblong through holes.

  As an indication, these plates 4 have a length L of the order of 1.5 meters and a width I of the order of 0.5 meters.

  Under this slatted floor 2, the installation comprises a low slope floor 5, of the order of two percent. This low slope soil 5 extends over the entire width of the building (for example 15 meters) from the lower part of a high tank tank 6 to the discharge edge 7 of a low storage tank 8.

  2862488 - 7 As an indication, for a building with a total length of about thirteen meters, the sloping floor is placed at a height of 0.25 meters under the grating, at the upstream part referenced 9 and at 0.50 meters under the grating. partly downstream, referenced 10.

  The storage tank 8 is advantageously placed outside the building, as it appears in FIG. 3, this storage tank has a capacity thirty to forty percent greater than that of the top tank 6 of drop.

  The drip tray 6 is, in turn, advantageously placed inside 1 o of the covered building, as shown in Figure 3.

  The bottom wall 11 of the storage tank 8 is advantageously sloped, for example by 2%, in the direction of a collection pipe, not shown, connected to a storage pit, not shown.

  A pump 12 is placed in the storage tank 8 in the upper part 15 of the inclined bottom wall 11, this pump 12 for separating the decanted slurry.

  The drop tray 6 is generally parallelepipedal in the embodiment shown. It extends over the entire width of the building and therefore over the entire width of the low slope floor 5 placed under the floor slatted 2.

  This drop box is of robust design.

  It does not include a hinge, and the materials used for its realization make it very insensitive to the corrosive action of slurry. For example, the walls of the drop tray 6 are made of composite material with fiberglass reinforcement, or sulfo-aluminous cement (see FR-2.767.817).

  As it appears in FIGS. 4 and 5 in particular, the drop box comprises: two vertical main front and rear walls 13, 14; two vertical side walls 15,16; a bottom wall 17; the assembly defining a parallelepipedal volume, the dimensions of which are indicative of the following: 2862488 -8 height H 1.2 meters; width 5 meters; - depth P 0.6 meters.

  If necessary, the drop pan is provided with reinforcing partitions 18, 19, substantially parallel to the side walls 15, 16, as shown in FIG.

  In the lower part, over its entire width, the drop tray 6 is provided with an inflatable means 20 or inflatable roll forming lifting means for the bottom wall 17.

  1 o The inflatable bead is made of a material such as rubber, insensitive to the corrosive action of slurry.

  When the flange is deflated, as shown in Figure 4, the drip tray is open, over its entire width, to an opening height of the order of ten to twelve centimeters, for the dimensions presented before.

  Deflation of the flange is performed at high speed, by a large lateral orifice. As a result, a slurry of liquid slurry of several centimeters flows at high speed, of the order of fifteen meters in three seconds, to clean the soil in shallow slope 5, over its entire width and length, without dead zone.

  The hydrocuring cycle is carried out as follows, in one embodiment of the installation.

  First, a pneumatic solenoid valve closes all the exhaust ports of the inflatable tube 20 and a second solenoid valve allows the inflation of the tube 20 at a pressure sufficient to ensure the closure of the tank 6 with sealing, given the weight of liquid to be placed in the tray 6.

  Then the pump 12 contained in the tank 11 is started to convey the clear part of the mixture contained in the tank 11 to the drop tank 6, by a pipe 21.

  An overflow is provided in the drip tray 6 for the return to the storage tank 11.

  Advantageously, the pipe 21 is placed under a concrete slab 2862488 9 retractable, placed in the building, on a longitudinal edge.

  It is thus possible to intervene, sheltered, without earthwork, on this pipe 21.

  After the filling of the drop tank 6, a drain valve of the receiving tank 8 is opened to evacuate the decanted slurry contained in this receiving pit 8.

  Then the inflation rod 20 is deflated rapidly, producing a slurry blade cleaning the soil 5, this blade discharging, with the waste entrained by it, in the storage tank 8.

  1 o At the beginning of the rearing cycle, the animals do not produce enough droppings, in particular liquids, for the system to function as described above. It is necessary, in order to start the hydrocuring system, to fill the drop tank 6 with water, and to provisionally condemn the emptying of the storage tank 8, until the volume of manure is produced. for animals, such that a significant settling takes place in the storage tank 8.

  In one embodiment, the deflation of the flange 20 is obtained by opening at least one valve through the bottom wall 17 of the drop tank 6, the coil assembly 20 / bottom wall 17 being extractable, in the manner a cassette, for maintenance or possible repair.

  As it appears in FIG. 4, the bottom wall 17 is articulated by a loose interlocking fitting, with a clearance compensated by compressible joints, for example made of elastomer 23. Such an embodiment avoids any mechanical hinge part, in particular a metal part, and is very robust.

  The installation that has just been described can be easily implemented in renovation of an existing livestock building. The operation can be controlled manually or by an electrical box for hydrocuring cycles performed at scheduled times several times a day.

  The drip tray 6, for example PVC or polyester, possibly reinforced with fibers, is formed by the assembly of flat panels, cut according to the width of the breeding room. Each room can be provided with a dedicated system of hydrocuring, without mixing liquids between breeding rooms. The plant according to the invention is particularly suitable for maternity huts, post-weaning boxes or breeding adult pigs.

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Claims (17)

  1. Drip tank (6) for hydrocuring installation characterized in that it comprises means for opening the tank over substantially a whole length thereof, for quick emptying.   2. Drip tank according to claim 1, characterized in that the opening means comprise an inflatable element and means for pressurizing and deflating this inflatable element.   3. Drip tank according to claim 2, characterized in that the inflatable element is a bead (20) extending substantially over the entire length of the bottom wall (17) of the tank (6), this bead ( 20) being placed in a box below said bottom wall (17).   4. Drip tank according to claim 3, characterized in that the bottom wall (17) is mounted in loose interlocking with compressible seals (23) against a wall of the tank, this loose fitting with compressible seals defining an articulation on substantially the entire length of the tank (6).   5. Drip tank according to any one of claims 1 to 4, characterized in that it is formed of the assembly of panels of polymeric material such as PVC or polyester, or fiber-reinforced polymer material, or of a hydraulic binder with high resistance to organic acids, such as sulfo-aluminous cement.   6. Drip tank according to any one of claims 3 to 5, characterized in that the bottom wall (17) is provided with valves allowing, by their opening, at least partial deflation of a bead (20) placed under the bottom wall (17) of the tank (6), causing the movement of this bottom wall (17) and the opening of the tank (6) over substantially a whole length.   7. Drip tank according to any one of claims 1 to 6, characterized in that its opening, over a whole length, defines a passage of the order of ten centimeters in height, over an opening length of a few meters , for an internal vessel volume (6) greater than two cubic meters.   8. Hydrogenation plant comprising at least one dropping tank as presented in any one of claims 1 to 7, characterized in that it further comprises a storage tank (8) provided with a pump ( 12), this pump (12) being connected to the drop tank by a pipe (21).   9. Hydrogenation plant according to claim 8, characterized in that the capacity of the storage tank (8) is at least thirty percent greater than that of the drop tank (6).   10. Installation of hydriding according to claim 9, characterized in that the capacity of the storage tank (8) is thirty to forty percent higher than that of the drop tank (6).   11. Installation of hydrocuring according to any one of claims 8 to 10, characterized in that the drop tank (6) is provided with an overflow.   12. Installation of hydrosure according to claim 11, characterized in that the filling pipe (21) of the drop tank (6) is disposed over most of its length, under a retractable pavement.   13. A hydrosetting installation according to any one of claims 8 to 12, characterized in that the bottom wall (11) of the storage tank (8) slopes in the order of a few percent. , the pump (12) being placed in the upper part of this bottom wall (11).   14. Installation of hydrosure according to any one of claims 8 to 13, characterized in that the storage tank (8) is connected via a manifold to a settling tank before spreading.   15. Installation of hydrosure according to any one of claims 8 to 14, characterized in that the storage tank (8) is provided with an overflow connected to a sump.   16. Breeding room provided with an installation as presented in any one of claims 8 to 15, characterized in that the storage tank (8) is external to the covered building of the room, the drop tank ( 6) being placed upstream and over substantially the entire width of a slightly sloping ground (5) placed under a false slatted floor (2).   17. Breeding room according to claim 16, characterized in that the filling pipe of this drop tank is placed over most of its length, under a retractable pavement, in the covered building of the room, in particular laterally. on the false slatted floor (2).