WO2018201207A1

WO2018201207A1 - Portable hand-operated agricultural sprayer

Info

Publication number: WO2018201207A1
Application number: PCT/BG2017/000021
Authority: WO
Inventors: Liubomir MINCHEV; Georgi Hristov
Original assignee: "Agro Snaiper" Ood
Priority date: 2017-05-05
Filing date: 2017-09-14
Publication date: 2018-11-08
Also published as: BG2767U1

Abstract

The invention relates to portable hand-operated agricultural sprayer featuring two modular chemical containers for sequential use in the application of chemicals on agricultural crops or on weeds with application in agriculture. The sprayer is equipped with shoulder straps (3) for securing on operator's back and consists of two modular containers assembled to one another, respectively first container (1) for herbicide and second container (2) for herbicide neutralizer. On the openings of the containers (1, 2) there is a cap for herbicide (4) on which there are air valves (5, 8) and finned connectors (6, 9) to which are connected the first flexible hose for herbicide (10) and the second flexible hose for herbicide neutralizer (11) each of which is equipped with first valve (13) for herbicide and second valve (14) for herbicide neutralizer. Each of the valves (13, 14) is connected to a lug (15) and to the first tube (24) is attached second tube (25), the first tube (24) being connected via the first valve (13) to the first flexible hose for herbicide (10), and the second tube (25) being connected via the second valve (14) to the second flexible hose for herbicide neutralizer (11). At the ends of these tubes (14, 25) are located the first nozzle for herbicide (28) and the second nozzle for herbicide neutralizer (29) mounted on tubular housing (27); the diameter of the opening of each nozzle is between 0.5 and 1.2 mm, the nozzle length is between 18 and 32 mm, and the wall thickness is between 0.1 and 0.5 mm. The first modular container (1) is tightly fit to the second modular container (2) using wedged grooves (32) and protruding wedge ridges (33). The first valve for herbicide (13) and the second valve for herbicide neutralizer (14) are located within the housing (19) in which is installed the plunger (20) with spring (17) closed on top with mounting cap (18), the lower end of the plunger (20) being in contact with arm (21) on the lug (15) attached using hinge (23) to the trigger assembly (12). The first tube (24) and the second tube (25) are designed as telescopic tubes inside which by means of screw connectors (26) is installed telescopic tip (31) consisting of first telescopic tube (32) and second tube (31). At the end of the first telescopic tube (32) and the second telescopic tube (31) are located respectively the first nozzle (28) and the second nozzle (29). The telescopic tip (31) is extendable as needed to the desired length using the screw connector (26).

Description

PORTABLE HAND-OPERATED AGRICULTURAL SPRAYER

Field of the invention

The invention relates to portable hand-operated agricultural sprayer that features two modular chemical containers designed for sequential use in spraying chemicals on agricultural crops and on weeds with application in agriculture.

Prior art

There is Patent US2013186977 for portable sprayer designed in the form of backpack for the operator, which includes multiple containers and a pump for spraying chemicals. Using flexible hoses, the containers are connected to a control manifold with a handle and a main tube with a nozzle at its end is connected to the manifold assembly. Using the manifold assembly, the user controls the selection of a specific chemical from the containers to be sprayed through the nozzle mounted on the tube. The chemicals in the containers are pressurized and manually pumped and supplied to the nozzle. The pump draws liquid from a manifold-selected supply container outward through tubes to the manifold, which has a console of valves. Separate return tubes are provided for each chemical from the manifold back to the containers of origin, and the manifold allows convenient flushing of each chemical back to its container of origin. This ensures that chemicals from the containers are not mixed or cross-contaminated, and avoids wasting chemicals as all residual is returned back to its respective container. The manifold valves are carried on a waist belt at the hip for ease of control during spraying, without need to take off the backpack sprayer. This sprayer only sprays chemicals and is not suitable for ejection of chemicals in a jet upon a specific plant or weed or within a specified restricted area.

There is also the technical solution from patent WO02062485 that relates to a portable backpack pump sprayer to spray liquid, chemical substances such as pesticides, fungicides and fertilizers, comprising a large storage tank in which a pressure container is mounted. A pumping assembly that is manually actuated with the bottom portion of the pressure container and also with the bottom portion of the tank is connected. The pumping assembly comprises an oscillating plunger to extract liquid from the storage tank and pressurize said liquid inside the pressure container. The operator can discharge the pressurized liquid using a hose and a control valve that is affixed to the pressure tank. The pumping assembly also comprises a double-wall plunger and an anti-leak barrier to collect any liquid that may leak out of the plunger. The oscillating action of the plunger is used to return the liquid that has leaked out to the storage tank by means of a return siphon. This sprayer also spreads chemicals in the form of spray and is not suitable for administering chemicals in the form of jet upon a specific plant or weed.

Summary of the invention

The purpose of the invention is to create a portable hand-operated agricultural sprayer for sequential use in spraying chemicals on agricultural crops and on weeds that is easy to handle and to maintain, and sprays chemicals in a jet on specific plants or weeds thus preserving the useful plants in the surroundings, and offers ease of assembly and container cleaning.

The portable hand-operated agricultural sprayer is designed in the form of a backpack including shoulder straps to secure the sprayer to operator's back and comprises two modular containers fitted to each other, the first container being designed for herbicide and the second container is for herbicide neutralizer. On the opening of the first container there is a cap for herbicide with an air valve on its face and a first ribbed connector to which is attached the first hose. On the opening of the second container there is a cap for herbicide neutralizer with another air valve on its face and the second ribbed connector to which is attached the second hose. The first and second hoses are connected to a trigger assembly with a handle, whereas the hoses are located within that assembly, the first hose being connected with the first valve for herbicide and the second hose being connected to the second valve for herbicide neutralizer, each valve being connected to a lug mounted on top of the handle.

Two pipes, first and second, are installed on the trigger assembly, the first pipe being connected through the first valve to the first hose for herbicide and the second pipe being connected through the second valve to the second hose for herbicide neutralizer; the two pipes are fixed to each other using a clamp. At the end of each pipe there is a nozzle: first nozzle for herbicide and second nozzle for herbicide neutralizer, installed within a tubular body; the diameter of the orifice of each nozzle is between 0.8 and 1.2 mm.

The first herbicide valve and the second herbicide neutralizer valve are made of a housing in which is installed a spring-loaded plunger capped by a mounting cap, the piston at the lower end being in contact with an arm on the lug connected by a hinge mechanism to the trigger assembly.

The first modular container is assembled to the second modular container with wedge grooves in the top and bottom part of the side wall of the first herbicide container and outwardly wedge ridges on the side wall of the second herbicide neutralizer container, with the ridges sliding in the grooves.

In a preferred embodiment, the first and second tubes are made as telescopic tubes within which a screw telescopic tip made of first and second telescopic tubes is mounted by means of screw connections. At the end of the first and second telescopic tubes, the first and second nozzles are located respectively. The telescopic tip is optionally extendable at a desired length by means of the screw connection.

Benefits of the invention

The proposed portable hand-operated agricultural sprayer offers the following:

- spraying of herbicides on crops and weeds and, if necessary, timely spraying of herbicide neutralizer;

is easy to handle and service and sprays a fine jet of chemicals on specific plants and weeds while keeping adjacent useful plants unharmed;

- convenient assembly and easy to clean containers;

- compact design, backpack style;

- different chemicals are used in the containers without the need to drain and change the chemicals, and without the need to flush them to avoid cross-contamination;

- reducing or eliminating any risk of chemical mixing and cross-contamination;

- the operator easily controls the exact amount of chemical to be sprayed on the plants or weeds;

- easy to control and use, and lightweight to be carried by the operator;

- it is environmentally friendly because it does not contaminate the surrounding plants and free areas between them Brief description of the drawings

The utility model is explained by the drawings as follows:

Fig. 1 - Axonometric projection of the sprayer;

Fig. 2 - Exploded view in A of the trigger mechanism, in axonometric projection;

Fig. 3 - Exploded view in B of the two nozzles in an axonometric projection;

Fig. 4 - Vertical section of the cap for herbicide;

Fig. 5 - Vertical section of the two assembled containers;

Fig. 6 - Axonometric projection of the two containers in a disassembled position;

Fig. 7 - Front view of first and second tubes with the telescopic tip

Preferred embodiment of the invention

The preferred embodiment of the portable hand-held agricultural sprayer according to the drawings is in the form of backpack and includes straps 3 for attachment to the sprayer operator and consists of two modular containers fitted to one another, the first container 1 being for herbicide and the second container 2 being for herbicide neutralizer. On the opening of the first container 1 there is cap for herbicide 4 and on its face there is air valve 5 and first finned connector 6 to which the first flexible hose 10 is connected. On the opening of the second container 2 there is herbicide neutralizer cap 7, on the face of which there is air valve for herbicide neutralizer 8 and second finned connector 9 to which flexible hose for herbicide neutralizer 11 is connected. Flexible hoses 10, 11 are connected to trigger assembly 12, to the rear of the trigger valve housing, wherein flexible hoses 10, 11 via herbicide coupler (13') and herbicide neutralizer coupler 13" are connected respectively to herbicide valve 16 and herbicide neutralizer valve 14. Valves 14, 16 are flexible hoses with thin elastic walls wherein the outer wall of the herbicide valve 16 is in contact with herbicide lug 30' and the outer wall of the herbicide neutralizer valve 14 is in contact with herbicide neutralizer lug 30". Each valve 16, 14 is freely connected by means of spring 29, respectively, with herbicide trigger 15' and herbicide neutralizer trigger 15", whereas the housing of the trigger mechanism 12 is equipped with handle 22 for operator's convenience. Supports 31 are arranged around the valves 14, 16 whereby pressing the trigger for the herbicide 15 ', by means of the spring 29, the lug 30' presses the elastic walls of the herbicide valve 16 against the supports 31 , thus cutting the supply of herbicide to the herbicide tube 25. When the herbicide neutralizer trigger 15" is pressed, the herbicide neutralizer lug 30" presses the herbicide neutralizer valve 14 to the supports 31 thus cutting the supply of herbicide neutralizer to the herbicide neutralizer tube 26.

The herbicide tube 25 and the herbicide neutralizer tube 26 are mounted in the front of the trigger housing, the two tubes 25, 26 being fixed to one another by means of a clamp 17. At the end of each tube 25, 26 are installed herbicide nozzle 28 and herbicide neutralizer nozzle 27 mounted in tubular housing 18, 19, with diameter of the opening of each nozzle 27, 28 between 0.5 and 1.2 mm, length of the nozzle 27, 28 between 18 and 32 mm, and wall thickness between 0.1 and 0.5 mm.

The assembly between the first modular container 1 and the second modular container 2 is achieved by wedge grooves 32 on one side wall of the first herbicide container 1 at its upper and lower ends and wedge ridges 33 on the side wall of the second herbicide neutraiizer container 2 which fit tightly in the grooves 32.

The herbicide air valve 5 is located inside the herbicide container 1 and the herbicide neutraiizer air valve 8 is installed inside the herbicide neutraiizer container 2. Safety tube 21 is provided to the outer wall of herbicide air valve 5, and a second safety tube (20) is mounted to the outer wall of herbicide neutraiizer air valve (8).

In an alternative embodiment, the first tube 24 and the second tube 25 are designed as telescopic tubes inside which by means of screw connectors 26 is installed telescopic tip 31 consisting of first telescopic tube 32 and second tube 31. At the end of the first telescopic tube 32 and the second telescopic tube 31 are located respectively the first nozzle 28 and the second nozzle 29. The telescopic tip 31 is extendable as needed to the desired length using the screw connector 26.

Literature:

1. US2013186977

2. WO02062485

Claims

1. Portable hand-operated agricultural sprayer equipped with shoulder straps (3) for securing the backpack-style sprayer to operator's back, consisting of two modular containers (1 , 2) each of which features an opening (23, 24) for installation of the strap and the two are assembled to one another; the first container (1) is for herbicide and the second container (2) is for herbicide neutralizer; each of these containers has a filling orifice whereas on the opening of container (1) there is a herbicide cap (4) with air valve for herbicide (5) on its face and first finned connector (6) to which is connected flexible hose for herbicide (10), and on the opening of container (2) there is herbicide neutralizer cap (7) with air valve for herbicide neutralizer (8) on its face and second finned connector (9) to which is connected flexible hose for herbicide neutralizer ( 1); whereas flexible hoses (10, 11) are connected to trigger assembly (12) with a handle (22); the hoses are equipped respectively with herbicide valve (16) and herbicide neutralizer valve (14) and each of these valves (16, 14) is connected respectively to herbicide tube (25) and herbicide neutralizer tube (26), the two tubes (25, 26) being fixed to one another using clamp (17) and at the end of each of the tubes (25, 26) are located respectively herbicide nozzle (28) and herbicide neutralizer nozzle (27), characterized in that the flexible hoses (10, 11) are connected via herbicide coupling (13') and herbicide neutralizer coupling (13") respectively to herbicide neutralizer valve (14) and herbicide valve (16) where valves (14, 16) are flexible hoses with thin elastic walls and the outer wall of herbicide valve (16) is in contact with herbicide lug (30') and the wall of herbicide neutralizer valve ( 4) is in contact with herbicide neutralizer lug (30") around the valves (14, 16) being arranged supports (31) and each of the valves (16, 14) is hinged via spring (29) to herbicide trigger (15') and herbicide neutralizer trigger (15"), and the herbicide air valve (5) is located inside the first container (1) for herbicide while the herbicide neutralizer valve (8) is located inside the second container (2) for herbicide neutralizer.

2. Portable hand-operated agricultural sprayer according to claim 1, characterized in that to the outer wall of the herbicide air valve (5) is attached safety tube (21), and to the outer wall of the herbicide neutralizer air valve (8) is attached second safety tube (20).

3. Portable hand-operated agricultural sprayer according to claims 1 and 2, characterized in that herbicide nozzle (28) is installed in the first housing (19) and the herbicide neutralizer nozzle (27) is installed in the second housing (18), the housings (19, 18) featuring knurls for installing, removing and cleaning the nozzles (27, 28), the diameter of the orifice of each nozzle (27, 28) being between 0.5 and 1.2 mm, the nozzle length being between 8 and 32 mm, and the wall thickness being between 0.1 and 0.5 mm.

4. Portable hand-operated agricultural sprayer according to claims 1, 2 and 3, characterized in that the first modular container (1) and the second modular container (2) are attached to one another with wedged grooves (32) on one of the side walls of the first container (1) in its upper and lower ends and wedge ridges (33) on one of the side walls of the second container (2) that fit tightly in the wedged grooves (32).

5. Portable hand-operated agricultural sprayer according to claims 1 , 2, 3 and 4, characterized in that the first tube (25) and the second tube (26) are telescopic tubes to which is attached telescopic tip (33) consisting of first telescopic tube (34) and second telescopic tube (35) at the ends of which are located respectively the first nozzle (27) and the second nozzle (28), the telescopic tip (33) being extendable as needed.