FR3057737A1 - DEVICE FOR SPRAYING A PHYTOSANITARY LIQUID WITH A SINGLE PUMP RECOVERY CIRCUIT. - Google Patents

Abstract

Spraying system (10) of a phytosanitary liquid (F), comprising sprayers (60) for diffusing this liquid (F) and a pump (40) for sucking up the liquid (F) to be sprayed and for sending to the sprayers (60) through a feed circuit (50), a recovery panel or screen (70) of the sprayed liquid, a recovery circuit (80) of the sprayed liquid, wherein the pump (40) comprises a first suction duct (41) intended for the suction of the liquid (F) to be sprayed, and at least a second suction duct (42) intended for the suction of the liquid recovered through the suction circuit; recovery (80).

Description

TITLE

DEVICE FOR PUL VERIFYING A PHYTOSANITARY LIQUID WITH A RECOVERY CIRCUIT

SINGLE PUMP

DESCRIPTION

This patent relates to spraying circuits and devices with recovery of phytosanitary liquid intended for agricultural machines, spreaders or sprayers and relates more particularly to a new system for spraying a phytosanitary liquid provided with a pump recovery circuit. unique.

In the field of agriculture, the use of spreading machines or sprayers for spreading phytosanitary liquids on plantations is well known.

These spreading machines include a tank of the liquid to be sprayed, several sprayers connected to the tank and a pump for the supply under pressure of the liquid to be sprayed.

Known spreading machines also include panels and / or tanks for recovering the pulverized liquid, the aim of which is to limit the dispersion of the phytosanitary liquid in the ambient medium and to recover the excess liquid for subsequent reuse, which also limits consumption.

Generally, these machines include a recovery panel or wall basically placed facing the sprayers and able to capture the sprayed liquid, which is collected by gravity in a tank located below.

This tank is equipped with at least one additional pump, which sucks up the recovered liquid and reinjects it into the tank.

One of the drawbacks of these machines, the type of which is known, consists in the fact that this second pump, by sucking in the recirculation liquid collected by the tank, often also sucks in air and the liquid sent into the tank, having a certain pressure, also causes foaming in the tank.

In addition, in machines of this type, problems of pressurization of the tank occur, because by sending the recirculation liquid directly into the tank under pressure, namely the air-liquid mixture pumped from the recovery tank, the liquid already contained in the tank is also pressurized, thus causing a probable leakage of liquid from the lid, which is not leaktight.

In addition, the known recovery circuits are unnecessarily complex, because they use pumps, tanks and other dedicated devices liable to break and which require frequent maintenance operations.

To overcome all these drawbacks, a new type of phytosanitary liquid spraying system with a single pump recovery circuit was studied and produced.

The main function of the present invention is to solve the aforementioned problems, since the liquid recovered from the sprayers is not injected into the tank or into other tanks but is returned to the sprayers by means of one and the same feed pump.

Another objective of the present invention is to simplify the device, by reducing the number of its components and more particularly by using a single and same pump with separate chambers and provided with multiple suction ducts.

These objectives - as well as others, direct and complementary - are achieved thanks to the new phytosanitary liquid spraying system with a recovery circuit with a single pump.

This new phytosanitary liquid spraying system includes at least one tank containing the liquid to be sprayed, several nebulizers or sprayers of the liquid contained in the tank, at least one pump for sucking the liquid from the tank, at least one circuit for supplying the liquid under pressure to the sprayers, at least one panel or screen recovering the sprayed liquid and at least one circuit for recovering the sprayed liquid, communicating with the pump, and in which the pump has separate chambers and comprises in turn at least a first suction duct connected to at least one tank, intended for the suction of the liquid to be sprayed, and at least a second suction duct connected to at least one recovery panel through the recovery circuit , for the suction of the recovered liquid and its discharge in the supply circuit.

The pump is therefore connected to the tank, from where it sucks the clean phytosanitary liquid through a sampling conduit, but also to one or more recovery panels, from which it sucks the recovered liquid through the recovery circuit.

Consequently, by using a single pump, the double objective can be achieved simultaneously of injecting the clean phytosanitary liquid and of recirculating the recovered liquid, since the clean liquid and the recovered liquid are mixed with the outlet by the pump and in the emission pipe, then sent to the sprayers.

The new system is likely to apply to two or more sprayers, as well as to two or more corresponding recovery panels or screens.

The characteristics of the new system will be better explained in the following description, with reference to the attached drawing boards by way of nonlimiting example, where the new system (10) and its operation are shown diagrammatically in FIG. 1, while only the pump (40) is shown in Figure 2.

It is a new spraying system (10) for phytosanitary liquid with a recovery circuit (80) and a single pump (40).

The new system comprises at least one tank (20) containing the liquid (F) to be sprayed, several vaporizers or sprayers (60) for the diffusion of the liquid (F) and conduits (30, 50) for supplying this liquid ( F) from the tank (20) to the sprayers (60).

The system comprises a pump (40) which, via a first sampling conduit (30), sucks the liquid (F) from the tank (20) and injects it under pressure into the sprayers (60) through at least one supply circuit (50).

The spraying system (10) also comprises, at a minimum, a panel or screen recovering (70) the sprayed liquid (F), placed facing at least one of the sprayers (60).

In FIG. 1, for example, the system (10) comprises two pairs of these sprayers (60), facing each other and opposite, and two pairs of corresponding recovery panels (70), respectively placed opposite the sprayers (60) associated therewith.

Each of these recovery panels (70) is connected to at least one recovery circuit (80) of the sprayed liquid (F), the recovery circuit (80) being in turn connected to at least one pump (40).

This recovery circuit (80) in turn comprises a conduit (81) for each of the recovery panels (70), the conduits (81) being in turn connected to the pump (40).

This pump (40) is of the type with separate chambers - for example, with several membranes or with pistons with independent chambers -, comprising at least one suction duct (41) connected to the sampling duct (30) for the suction of the liquid to be sprayed (F) from the tank (20), and at least one suction conduit (42) for sucking the recovered liquid through the recovery conduits (81). More particularly, the pump (40) preferably comprises at least one suction pipe (42) for each of the recovery pipes (81) serving the recovery panels (70).

A possible embodiment of the pump (40) is shown in FIG. 2, in which each suction chamber of the pump is made independent, each of them having its own suction duct (41, 42). The number of suction pipes (41, 42) depends on the number of membranes or pistons present in the pump (40).

In the solution shown by way of example in FIG. 1, the pump (40) sucks the liquid (F) to be sprayed and injects it under pressure into the supply circuit (50), comprising in turn, for example , a first common section (51), a distributor (52) installed on this first section (51) and making it possible to distribute the liquid (F) between other conduits (53) serving each of the sprayers (60).

Simultaneously, the pump (40) also sucks, through the suction conduits (42), the liquid (F) recovered by the recovery panels (70) and injects it under pressure into the supply circuit (50), where it mixes with the clean liquid (F) taken from the tank (20).

It is even possible to provide that the supply circuit (50) also includes other conduits (54) for the delivery of the liquid to other installations.

On the recovery conduits (81), it is preferable that one or more filters (82), able to retain the impurities present in the liquid to be recovered, be suitably mounted.

These are the succinct and sufficient modalities allowing an experienced person to carry out the invention; consequently, variations may be made to it in its practical application, without prejudice to the substance of this innovative concept.

With reference to the preceding description and to the plates appended thereto, the following claims are made.

Claims (8)

I. Spraying system (10) of a phytosanitary liquid (F), comprising several nebulizers or sprayers (60) for the diffusion of this liquid (F) and at least one pump (40) capable of sucking the liquid ( F) to be sprayed and sent to the sprayers (60) through a supply circuit (50), at least one panel or screen (70) for recovering the sprayed liquid, characterized by comprising at least one circuit recovery (80) of the sprayed liquid, connected to the pump (40), wherein said pump (40) is provided with separate chambers and in turn comprises at least a first suction duct (41), intended for the suction of the liquid (F) to be sprayed, and at least one second suction duct (42) connected to at least one recovery panel (70) through the recovery circuit (80), intended for the suction of the recovered liquid and when discharged into the supply circuit (50). 2. Spraying system (10) according to claim 1, characterized in that the pump (40) is of the type with several membranes or with pistons with independent chambers. 3. Spraying system (10) according to claim 1 or 2, characterized by comprising at least one tank (20) containing the liquid (F) to be sprayed, and in which the pump (40) sucks this liquid (F ) from inside the tank (20) through at least one sampling conduit (30) connected to the first suction conduit (41). 4. Spray system (10) according to any one of the preceding claims, characterized in that it comprises two or more sprayers (60) and two or more associated recovery panels (70), respectively placed opposite the corresponding sprayers (60) , and in which the recovery circuit (80) in turn comprises a conduit (81) for each of the recovery panels (70), these conduits (81) being in turn connected to one of the suction conduits (42 ) of 5 the pump (40). 5. Spraying system (10) according to claim 4, characterized by comprising two pairs of sprayers (60), facing each other and opposite, as well as two pairs of corresponding recovery panels (70), respectively placed facing the sprayers (60) 10 afferent. 6. Spraying system (10) according to any one of the preceding claims, characterized in that the pump (40) simultaneously sucks the liquid (F) through the sampling conduit (30) and the liquid (F ) recovered by the recovery panels (70), to inject it 15 then under pressure in the supply circuit (50). 7. Spray system (10) according to any one of the preceding claims, characterized in that the supply circuit (50) also comprises other conduits (54) for the delivery of the liquid to other installations. 20 8. Spraying system (10) according to any one of the preceding claims, characterized by comprising one or more filters (82) mounted on the recovery conduits (81) and able to retain the impurities present in the liquid to get back. ./ READ CO IO O ro CM