PL197115B1 - Piping system with a single flow meter - Google Patents

Abstract

Fluid system comprises tank (2), spraying nozzles (3), tank filling circuit (4), pulverization circuit from tank to nozzles (5) and pump (6). Both tank and pulverization circuits have pipe section (10) in common extending between tank/water supply valve (7) and tank/nozzles valve (8) and where pump (6) and flowmeter (9) are placed. Fluid is flowing always in same direction along this section.

Description

REPUBLIC

POLAND

Patent Office of the Republic of Poland (12) PATENT DESCRIPTION (19) PL (11) 197115 (13) B1 (21) Application number: 340474 (51) Int.Cl.

A01M 7/00 (2006.01) A01M 21/00 (2006.01) (22) Date of notification: 31.05.2000 (54) Installation with one flow meter for agricultural field sprayers

(30) Priority: 1999-06-02, FR, 9907118 (73) The right holder of the patent: NORD-PULVE S.A.R.L., Campagne Les Hesdin, FR (43) Application was announced: 04/12/2000 BUP 25/00 (72) Inventor (s): Joel Podevin, Douriez, FR (45) The grant of the patent was announced: 29 February 2008 WUP 02/08 (74) Representative: Drozd Anna, Patent Office

⁽⁵⁷⁾ 1. Installation with one flow meter for agricultural field sprayers, which consists of a tank, nozzles, tank filling system, spraying system, nozzles, pump and distribution valves, characterized in that at least the filling system (4) and the spraying system (5) they have a common circuit section (10) between the two valves (7) and (8) and a flow meter (9) is built in this section for measuring both filling and spraying.

PL 197 115 B1

Description of the invention

The subject of the invention is an installation for distributing a liquid in agricultural field sprayers attached to a tractor.

Each sprayer has a tank in which a certain amount of water is mixed with at least one type of chemical, e.g. an insecticide or a selective herbicide. The water / agent mixture is then supplied to the nozzles arranged along the beam. Both the beam and the tank are supported by the chassis (frame).

The sprayer itself, if it belongs to the class of sprayers with a small tank area, is mounted on the tractor as a mounted sprayer, or if it is a trailed sprayer with a large capacity, it rests on its own wheels.

A pump is used to supply the water / agent mixture from the tank to the nozzles, which transports the water / agent mixture by means of a suction line from the tank and a feed line for the nozzles. The multi-way valve - distributor allows you to: supply a group of sprayers with a solution, turn off the power as well as take the solution, circulate it in the pipes and redirect it to the tank.

In order to determine the amount of the agent used, a flow meter is usually fitted downstream of the pump on the feed circuit of the nozzles, which makes it possible to measure the amount of liquid sprayed out. On modern sprayers, the water enters the tank, which uses a pump to draw water from an external water source and lead it to the tank.

In such sprayers, it is possible, in particular, to fill the tank simultaneously and automatically introduce the chemical. A second circuit is thus provided for filling the tank in this way with a chemical agent, which has a pump in common with the first circuit. To optimize filling, on the second circuit, a second flow meter is placed in front of the pump, which measures the amount of water taken in to adapt it to the amount of chemical automatically injected by the Venturi system. In principle, the user of such sprayers has measuring means which determine how much, both of the water / agent mixture and during the distribution of the medium to the sprayers, has been consumed. However, due to the error in calibrating the flow meters, the accuracy of the measurements is not sufficient.

The essence of the invention consists in the fact that the installation with one flow meter, which consists of a tank, nozzles, a tank filling system, a spraying system - collecting the contents from the tank for distribution to the nozzles, a pump - common for both systems, diverter valves to select one of the circuits , a flow meter for measuring the flow rate and / or quantity at the time of filling and during distribution to the nozzles, characterized in that the filling system and the spray system have a common circuit section located between the two valves, and a flow meter for filling and filling is integrated in this section. for spray measurement.

A beneficial effect of the invention is to increase the accuracy of the measurement and dosing of the spray, which prevents overdosing of chemicals on the plants for consumption.

The subject of the invention in an exemplary embodiment is presented in the drawing which shows a diagram of the water / chemical circuit in a liquid distribution instance in a field sprayer with a schematic arrangement of individual system components.

Installation 1 consists of a tank 2, nozzles 3, tank filling system 4, spraying system 5, pump 6, distribution valves 7 and 8 for selecting one of the circuits, flow meter 9 for measuring the flow rate and / or quantity at the time of filling and during distribution for atomizers 3. The tank 2 is connected by pipes: a pipe 12 that connects the water tank with the system circuit and a pipe 14, which is intended for the initial filling of the tank 2 with water, with a common circuit section, a pipe 10 with an installed pump 6, which is intended for pumping water into a tank and for pumping liquid water / chemical to the nozzles 3 and a line 11 that carries the water / chemical liquid to pump 6 through valve 7, and from the pump through the flow meter 9 and diverter valve 8 through line 15 to the nozzles 3. Valve the distributor 8 alternately feeds the tank 2 via the line 14 and the atomizers 3. The flow meter 9 makes it possible to measure the flow of the stream pipe routed to one of the pipes downstream of the pump in a short circuit; diverter valve 8, tank 2 valve 7 pump 6, flow meter 9, the circuit for mixing water / chemical components or for measuring

The flow of the stream coming from the lines 11 and 12 located upstream of the pump 6, according to the marked flow direction S - in the case of the valve 7.

The design of the installation allows it to operate in two systems: filling system 4 and spraying system 5.

Installation 1 is designed to be mounted in agricultural field sprayers, and consists of a tank 2 for a chemical agent, from which the liquid is pumped to the nozzles 3.

From the water source 13, water is pumped through the line 12 through the valve 7 by pump 6 through the flow meter 9 and the diverter valve 8, through the line 14 to the tank 2, where it is mixed with the chemical that is in the tank 2 - in a small circuit (line 11, valve 7, pump 6, flow meter 9, valve 8, tank 2), the water is mixed with the chemical.

From the tank 2, the mixed liquid enters the atomizers 3 through the line 15 through the distribution valve 8.

If the concentration of the water / chemical liquid solution is too high, the installation allows the liquid to be refilled with water (pump 6 pumps water from the water source 13 through valve 7 and flow meter 9, valve 8 and line 14 to tank 2, where the liquid components are mixed and then directed to nozzles 3).

The advantage of the installation according to the invention is that the user can accurately select a given circuit by means of the valves, and the production cost of the installation is lower thanks to the use of one flow meter.

Claims (4)

Patent claims 1. Installation with one flow meter for agricultural field sprayers, which consists of a tank, nozzles, tank filling system, spraying system, nozzles, pump and distribution valves, characterized in that at least the filling system (4) and the spraying system (5) have a common section (10) of the circuit positioned between the two valves (7) and (8) and in this section a flow meter (9) is built in to measure both filling and spraying. 2. Installation according to p. The device of claim 1, characterized in that the flow meter (9) is located downstream of the pump (6). 3. Installation according to p. A method according to claim 1, characterized in that the liquid that flows through the common section (10) of the circulation always flows in the same direction (S), and the valve (7) upstream of the pump (6) is coupled on one side to the tank (2) through the conduit (11) for taking its content, and on the other side with the water source (13) by means of the conduit (12), while the distribution valve (8) located downstream of the common section (10) of the circuit alternately supplies the conduit (14) and the nozzles (3) through the pipe (15). 4. Installation according to p. The valve as claimed in claim 1, characterized in that the valves (7) and (8) are multi-way valves, the liquid stream from the valve (8), from the inflow line of the common section (10) of the circuit, is directed to one of the pipes downstream of the pump (6), and the flow from the valve (7), coming from different lines before the common section (10) of the circuit, is directed to one conduit on the common section (10) of the circuit.