RU227071U1 - DIAPHRAGM PISTON PUMP FOR SUPPLYING SPRAYER WORKING FLUID - Google Patents

Abstract

The utility model relates to agricultural engineering, in particular to pumps for supplying working fluid for biological sprayers. The utility model consists of a housing, the inside of which is covered with food-grade plastic, in which three cylinders are located. There are three connecting rod and piston groups located on the pump shaft. A membrane and a valve cover are attached to each piston, the inside of which is covered with food-grade plastic. The valve cover contains two identical valves: inlet and outlet. The pneumatic accumulator creates pressure in the compartment, lifting the membrane and piston. When the piston moves down, the intake valve opens, allowing fluid to enter the food-grade plastic-lined cylinder. Then the piston moves up, the inlet valve closes, and the discharge valve opens, pushing out the liquid. The process is repeated cyclically, creating a continuous flow of fluid at the desired pressure and flow rate. This device allows the pump to use a biological product instead of a chemical fluid to supply working fluid.

Description

The utility model relates to agricultural engineering, in particular to pumps for supplying working fluid for biological sprayers.

A known membrane metering pump [1], which contains two metering heads, two elastic membranes and two solenoids, alternately working on one movable armature. The yoke of each solenoid contains threaded bushings made of soft magnetic material, which are stops for the electromagnet armature and have one right-hand and the other left-hand thread for their simultaneous movement in opposite directions using the associated rotary dial. The pump membranes are made of sheet elastic material, and each of them is fixed between two conical flanges with a cone angle of 45° relative to the plane of the membrane.

The disadvantage of this invention is the fact that the design of the pump does not allow working with microorganisms into biological products.

A machine is known that contains a housing with a working chamber connected to suction and discharge valves, a rod and at least two membranes clamped in the housing and on the rod [2]. The cavities between the membranes are closed and filled with an incompressible moving medium, such as oil. The membranes have the same deflection. Fluoroplastic sheets can be used as a material for the membrane. The machine rod is connected to the reciprocating mechanism. To fill the cavities with oil, process fittings with plugs are provided. The pressure of the pumped medium is automatically distributed evenly across all installed membranes in all operating modes without the use of throttles or additional pressure sources. The design and operation process are simplified. High pressure of the pumped medium is ensured.

The disadvantages of the known machine are the fact that it is not suitable for working with biological products.

A pumping device [3] is also known, at least for pumping a fluid with at least one pumping chamber, at least one dimensionally stable pumping chamber element that at least partially limits the pumping chamber, and at least one an elastically deformable and in particular an annular pumping element, in particular a pumping membrane, which defines the pumping chamber together with the pumping chamber element and is placed on the pumping chamber element. The pumping element has at least one sealing extension, which is integral with the main body of the pumping element and is at least partially located in the sealing groove of the pumping chamber element when the pumping element is placed on the pumping chamber element. The pumping chamber element has an opposing surface for interacting with a pumping surface of the main body of the pumping element to pump fluid. Said opposing surface extends over at least three circular arcuate sections which are arranged in series, in particular when viewed in cross section, and wherein at least one edge region of the pumping chamber element delimiting the sealing groove is arranged such that it borders directly with at least one of the three circular arcuate sections. The technical result of the invention is to ensure the availability of a pumping device and/or a pump that has improved properties relative to the primary pumping function.

The disadvantage of this invention is the inability to work with biological products.

The technical result is the possibility of using biological preparations when carrying out plant protection work.

This is achieved by the fact that the internal parts of the body in contact with the biological product solution are covered with food-grade plastic, which will reduce the possibility of damage to microorganisms in the biological product.

The hydraulic diagram of the prototype working fluid pump is shown in Fig. 1.

The membrane pump consists of a housing 1, the internal parts of which in contact with the biological product solution are covered with food-grade plastic, in which three cylinders 3 are located. Three connecting rod-piston groups 4 are located on the pump shaft 2. A membrane 6, a valve cover 7, an internal part of which is covered with food-grade plastic, presses the edges of the membrane 6 against the pump body 1, thereby creating an isolated cavity (working chamber 12) for the pumped liquid. When the pump is operating, shaft 2 makes 550 revolutions per minute, forcing each of the three pistons 5 (and membranes 6) to push in one revolution and return them back in the process of filling the working chamber 12. In the valve cover 7 there are two identical valves, inlet 8 and outlet 9. The liquid obtained from the inlet line 13 is forced into the pressure line 10. A pneumatic accumulator 11 is attached to the body.

The operation of a diaphragm piston pump consists of the following steps.

In the initial position, membrane 6 is pressed against the upper side of cylinder 3, and exhaust valve 9 is closed. The pneumatic accumulator 11 creates pressure in the working chamber 12, lifting the membrane 6 and the piston 5. When the piston 5 moves down, the inlet valve 8 opens, allowing the liquid to enter the cylinder 3, covered with food-grade plastic.

Then the piston 5 moves up, and the inlet valve 8 closes, and the outlet valve 9 opens, pushing out the liquid. The process is repeated cyclically, creating a continuous flow of liquid at the required pressure and flow rate.

List of used literature

1. RF Patent No. 2160383, IPC F04B 43/04, membrane metering pump / Matsaev V.T., Chilipenko L.L. Announcement 97117305/06, 10/15/1997. Published: 12/10/2000 Bulletin. No. 34.

2. RF Patent No. 2491446, IPC F04B 43/00, volumetric membrane machine / Alexey Genrikhovich Zakharov, Valery Anatolyevich Ovchinnikov, Appl. 2011126236/06, 06/24/2011. Published: 08/27/2013 Bulletin. No. 24.

3. RF Patent No. 2796993, IPC F04B 43/00, a pumping device for at least pumping a fluid and a pump containing such a pumping device / Freiherr Farnbühler von und zu Hemmingen-Redschlag. Application EP 2020/079817 (22.10.2020), Published: 30.05.2023 Bulletin. No. 16.

Claims (1)

A diaphragm-piston pump consisting of a housing, inside of which there are three cylinders, a pump shaft on which there are three connecting rod and piston groups, three membranes, three valve covers, characterized in that the internal parts of the housing and valve covers that are in contact with the working fluid , covered with food-grade plastic, which reduces the harmful effects of biological products on microorganisms.