WO2017007436A1

WO2017007436A1 - Development for round pressure regulating dripper as used in irrigation pipes

Info

Publication number: WO2017007436A1
Application number: PCT/TR2016/000090
Authority: WO
Inventors: Süreyya TEVRÜZ
Original assignee: İsko Plasti̇k Ve Kalip Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇
Priority date: 2015-07-03
Filing date: 2016-07-01
Publication date: 2017-01-12

Abstract

This invention relates to round pressure regulating dripper that enables steady and homogeneous flow in case of pressure changes emerging from height differences on sloping lands; enables homogeneous irrigation experience in a much longer range compared to existing systems and offers easier assembling thanks to its symmetrical lid.

Description

DESCRIPTION

DEVELOPMENT FOR ROUND PRESSURE REGULATING DRIPPER AS USED IN

IRRIGATION PIPES

Technical Background

Prior Art

Today, round pressure regulating drippers are used for round irrigation pipes that feature pressure regulation. However, with these round pressure regulating drippers, water inside the pipe contacts membrane directly, hence foreign substances present in water are likely to get stuck in between the membrane and the catching lid, which, in turn, is quite likely to result in clogging in the course of time; as a result it loses its dripping feature.

Likewise, most of these round pressure regulating drippers as used at the present time are not equipped with antisiphon mechanism, which is defined as a system functioning to prevent (depending on the position of dripper) soil or foreign substances into dripper holes due to vacuum for reason of low water pressure once irrigation is off, hence clogging may occur frequently. No-drain feature that ensures no water is drained up to a certain pressure level has been enabled for solution to the foregoing problem whereas dripper operation in low pressure levels is then restricted and this, in turn, hinders long-range laying. Again, pressure regulating valves are very narrow on the round pressure regulating drippers as used at the present time and membrane range of motion is very limited, therefore it is very difficult for foreign substances that somehow get in the membrane area to be self-discharged through the outlet duct and that results in clogging in the course of time.

Then again the lid as is used on the round pressure regulating drippers today are not symmetrical, which leads to redundant waste of time and labour at the time of assembling. In addition, there are no welding grooves on the corner surface of the lid, loss of materials attributable to welding heat may prevent full and perfect joining of the body and the lid.

Objective of Invention

Objective of this invention is to ensure that water inside the pipe is filtered before contacting the membrane in the case of round irrigation pipes equipped with a pressure regulation feature, thus to prevent foreign substances present in water from getting in between the body and the lid on both sides of the membrane, causing clogging as a result.

Another objective of invention is to prevent soil or foreign substances into dripper holes due to vacuum for reason of low water pressure once irrigation is off (defined as antisiphon system) and also to ensure that foreign substances are discharged from the water outlet duct (defined as self cleaning system) as membrane moves in between the lid and the body through water pressure. It further relates to dripper operation in low pressures and enabling long-range laying in the meantime.

Another objective of invention is to enable that labyrinth-shaped ducts that feature desired quantity of flow and prevent adsorption of particles present in water through turbulence emerging at the time of flow are used both on dripper's lid and body, hence labyrinth-shaped ducts on dripper body will reduce preflow rate while labyrinth-shaped ducts on dripper lid will regulate steady flow rate with effect from the membrane pressing as per water pressure.

Again, it further intends to enable that labyrinth-shaped ducts on dripper body will regulate preflow rate while labyrinth-shaped ducts on dripper lid will regulate steady flow rate, and in this way, depending on the combination of the two pieces, costs of mould will be reduced and difficulty of producing dripper body will be eliminated.

Another objective of invention is to ensure that the lid is symmetrical to avoid redundant waste of time and labour at the time of assembling. Another objective of invention is to tolerate loss of materials attributable to welding heat to join the body and the lid, thus to safeguard a full and perfect integration of the two pieces.

Explanation of Figures

Figure- 1 : A perspective view of the product in this intervention,

Figure - 2: A perspective view of the fractionated product in this intervention,

Figure - 3: A perspective view of the product in this intervention from the rear, Figure -4: A detailed view of the dripper body,

Figure -5: A sectional view of the dripper body,

Figure -6: A view of the lower part of the dripper lid. Explanation of References in Figures

1. Dripper body

1.1. Pressure relief duct

2. Membrane

3. Dripper lid

3.1 Pressure fixing duct

3.2 Water inlet hole

3.3 Water outlet hole

3.4 Welding groove

4 Membrane housing

4.1. Lid seat

5 Filter canal

Sealing wick Explanation of Invention

Product of invention is composed of three main components, namely a cylindrical dripper body (1 ), a membrane (2) made of a flexible material such as silicone etc., and a symmetrical dripper lid (3). Centre-piece of the dripper body (1 ) in the product of invention has a membrane housing (4) into which a membrane (2) is placed. There are perforated filter canals (5) on the lower surface of membrane housing (4). These filter canals (5) filter irrigation water before reaching the membrane (2), thus prevents clogging due to foreign substances. The product of invention has a sealing wick (5.1 ) around filter canals (5). Membrane (2) cuts off vacuum effect onto these sealing wicks (5.1 ) as it is likely to arise due to interrupted irrigation / reduced water pressure, hence it prevents soil or foreign substances into dripping holes due to emerging vacuum. Product of invention has a lid seat (4.1 ) on the upper part of the membrane housing (4). The lid seat (4.1 ) allows, at the time of assembling, that the dripper lid (3) is easily seated on the dripper body (1 ).

In the product of invention, exterior surface of the dripper body (1 ) has labyrinth-shaped pressure relief ducts (1.1 ) that reduce water pressure. These pressure relief ducts (1.1 ) reduce irrigation water pressure to a desired level. Again, placing these pressure relief ducts (1.1 ) symmetrically on the body surface provides assembling convenience. Dripper lid (3) is symmetrical in the product of invention, and comes with a water inlet hole (3.2) and water outlet hole (3.3) that alternately substitute for each other depending on their position. Again, lower surface of the dripper lid (3) has a pressure fixing duct (3.1 ) in a zigzag shape and concave structure. Depending on water pressure, membrane (2) rises and applies pressure onto pressure fixing duct (3.1 ), which enables that inflow through water inlet hole (3.2) thanks to pressure fixing duct (3.1 ) discharges through water outlet hole (3.3) at any desired pressure range (in any desired flow rate). Product of invention is also equipped with welding grooves (3.4) upon corner surface of the dripper lid (3). As these welding grooves (3.4) are first to melt down due to heat at the time of welding process for joining dripper body (1 ) and dripper lid (3), it prevents alteration of structure of the dripper lid (3) and features a full and perfect joining with no leaks.

In the product of invention, membrane (2) is in the same way as membrane housing (4), and is positioned in the lower part of the pressure fixing duct (3.1 ) that, in turn, is precisely placed on the upper part of filter canals (5) and on the dripper lid (3). Depending on the water pressure, membrane (2) moves upwards inside the membrane housing (4).

Claims

1. It is characterised as a development for round pressure regulating dripper as used in irrigation pipes and contains perforated filter canals (5) that are placed on the lower surface of membrane housing (4) in the dripper body (1 ) and ensures irrigation water is filtered before reaching the membrane (2).

It is the filter canals (5) in Claim 1 and is characterised as sealing wicks (5.1 ) that are seated on membrane (2) during the vacuum effect likely to emerge in low water pressures, and eliminate it.

3. It relates to a development for round pressure regulating dripper as used in irrigation pipes in Claim 1 and is characterised as a symmetrical dripper body (1 ) that, in turn, is equipped with labyrinth-shaped pressure relief ducts (1 .1 ) on the external surface in order to reduce water pressure.

4. It relates to a development for round pressure regulating dripper as used in irrigation pipes in Claim 1 and is characterised as a lid seat (4.1 ) on the upper part of membrane housing (4).

5. It relates to a development for round pressure regulating dripper as used in irrigation pipes in Claim 1 and is characterised as a symmetrical dripper lid (3) containing a water inlet hole (3.2) and a water outlet hole (3.3) that alternately substitute for each other depending on their position.

6. It relates to dripper lid (3) in Claim 5 and is characterised as a pressure fixing duct (3.1 ) in a zigzag shape and concave structure on lower surface thereof.

7. It relates to dripper lid (3) in Claims 5 or 6 and is characterised as welding grooves (3.4) on the corner surfaces.

8. It relates to a development for round pressure regulating dripper as used in irrigation pipes in Claim 1 and is characterised as a membrane (2) that is positioned in between the upper of the filter canals (5) and lower part of the pressure fixing duct (3.1 ) on the dripper lid (3), and that is made of a flexible material, moving upwards and downwards inside the membrane housing (4) depending on water pressure.

9. It relates to a development for round pressure regulating dripper as used in irrigation pipes in any of the claims above, and is characterised as pressure relief ducts (1.1 ) upon symmetrical dripper body (1 ) for reduced initial pressure of water, a membrane (2), which, depending on the water pressure, moves upwards and downwards inside a membrane housing (4) so that water discharges from water outlet hole (3.3) at any desired pressure range (in any desired flow rate), and a pressure fixing duct (3.1 ) on the lower surface of the dripper lid (3) in conjunction.