NZ626221B2 - Improvements in and relating to irrigation - Google Patents

Abstract

use of an elongate shroud (1) is disclosed. The elongate shroud may be use to protect an in-ground sprinkler system. The elongate shroud includes an above ground portion (A) and a below ground engaging portion (B). A height management feature, such as a line (19), is formed in the shroud between the above (A) and below (B) ground portions which is configured to indicate a level to which the below ground engaging portion (B) is to be buried into the ground to provide stability, in use, of the above ground portion (A). The length of the above ground portion (A) is the same as, or greater than, the length that the below ground engaging portion (B) extends below the height management feature. he above (A) and below (B) ground portions which is configured to indicate a level to which the below ground engaging portion (B) is to be buried into the ground to provide stability, in use, of the above ground portion (A). The length of the above ground portion (A) is the same as, or greater than, the length that the below ground engaging portion (B) extends below the height management feature.

Description

James & Wells ref: 237890DIV3/79 PATENTS FORM NO. 5 Fee No. 4: $250.00 PATENTS ACT 1953 COMPLETE SPECIFICATION Divisional Application from NZ 604421 (which itself is a Divisional Application from NZ 603312) IMPROVEMENTS IN AND RELATING TO IRRIGATION We, RX Plastics Limited, a New Zealand company of 445-453 West Street, Ashburton 7700, New Zealand; hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed to be particularly described in and by the following statement: James & Wells ref: 237890DIV3/79 IMPROVEMENTS IN AND RELATING TO IRRIGATION TECHNICAL FIELD The present invention relates to improvements in and relating to irrigation.

BACKGROUND ART At present irrigation systems can be broadly classified into two classes fixed in ground systems (often referred to as solid set systems) and mobile above ground systems.

In general solid set systems are used for horticultural applications, particularly for irrigating very large areas of land, and mobile systems are used for animal farming applications usually for smaller areas of land to minimise set up time. Solid set systems comprise a riser pipe which extends from an in ground supply line and upon which a sprinkler head is located; and mobile systems comprise a string of sprinkler units on skids or pods which are joined by an above ground supply line A key reason for solid set systems being used in horticulture is that larger animals, such as cattle and pigs, can cause extensive damage to sprinklers left in situ due to the animals size, weight and frequently curiosity of the animal.

To combat these problems mobile sprinkler systems have been developed to be used predominantly when a field does not have animals grazing thereon and the sprinklers are simply swapped to a new field as the animals are rotated between fields or they are large enough for the animals not to interfere with them. Some mobile sprinkler systems such as the applicants very successful K-LINE sprinklers have a protective pod which surrounds the sprinkler to protect the sprinkler from animals should the sprinklers and animals share a field for a period of time as well as protect the sprinklers from damage when being moved between fields.

However, when grazing large herds on large fields mobile systems suffer from a number of drawbacks including: - Time and labour involved with moving the sprinkler line(s) within a field and/or between fields; - Ensuring proper placement of the pods each time the mobile system is set up to ensure proper coverage of the field with liquid from the sprinkler head occurs.

James & Wells ref: 237890DIV3/79 It is an object of the present invention to address the foregoing problems or at least to provide the public with a useful choice.

All references, including any patents or patent applications cited in this specification are hereby incorporated by reference. No admission is made that any reference constitutes prior art. The discussion of the references states what their authors assert, and the applicants reserve the right to challenge the accuracy and pertinency of the cited documents. It will be clearly understood that, although a number of prior art publications are referred to herein, this reference does not constitute an admission that any of these documents form part of the common general knowledge in the art, in New Zealand or in any other country.

Throughout this specification, the word "comprise", or variations thereof such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.

Further aspects and advantages of the present invention will become apparent from the ensuing description which is given by way of example only.

DISCLOSURE OF THE INVENTION According to one aspect of the present invention there is provided an in-ground shrouded sprinkler assembly wherein: - a sprinkler assembly which includes an upright riser on which a sprinkler head is mounted; - a shroud which includes one or more walls with an opening at the top thereof, wherein the wall(s) substantially surround a sprinkler assembly, but wherein said wall(s) do not surround said sprinkler head in a manner which will, in use, interfere with delivery of liquid via sprinkler head; and wherein - the shroud is configured to include: - an above ground portion; and - a below ground engaging portion; wherein the shroud also includes an animal guard which covers the opening and protects the sprinkler assembly.

An in-ground shrouded sprinkler assembly substantially as described above wherein the assembly includes a control valve.

An in-ground shrouded sprinkler assembly substantially as described above wherein the ground engaging portion includes at least one anti-rotation portion.

James & Wells ref: 237890DIV3/79 An in-ground shrouded sprinkler assembly substantially as described above wherein the ground engaging portion includes at least one height management feature.

An in-ground shrouded sprinkler assembly substantially as described above wherein the shroud includes at least one positioning element to maintain the upright riser in a substantially vertical orientation.

An in-ground shrouded sprinkler assembly substantially as described above wherein the top edge of the wall(s) is rounded to minimise cattle rub damage.

According to a further aspect of the present invention there is provided a shroud configured to include: - one or more walls with an opening at the top thereof, wherein the wall(s) can, in use, substantially surround a sprinkler assembly, but wherein said wall(s) do not surround said sprinkler head in a manner which will, in use, interfere with delivery of liquid via sprinkler head; and wherein - the shroud is configured to include: - an above ground portion; and - a below ground engaging portion.

According to a further aspect of the present invention there is provided a shroud substantially as described above wherein the shroud also includes an animal guard which covers the opening and protects the sprinkler assembly.

According to a further aspect of the present invention there is provided a shroud substantially as described above wherein the ground engaging portion includes at least one anti-rotation portion.

According to a further aspect of the present invention there is provided a shroud substantially as described above wherein the ground engaging portion includes at least one height management feature.

According to a further aspect of the present invention there is provided a shroud substantially as described above wherein the shroud includes at least one positioning element to maintain the upright riser in a substantially vertical orientation.

According to a further aspect of the present invention there is provided a shroud substantially as described above wherein the top edge of the wall(s) is/are rounded to minimise cattle rub damage.

James & Wells ref: 237890DIV3/79 According to a further aspect of the present invention there is provided an irrigation system which includes a plurality of in-ground shrouded sprinkler assembly substantially as described above.

BRIEF DESCRIPTION OF THE DRAWINGS Further aspects of the present invention will become apparent from the ensuing description which is given by way of example only and with reference to the accompanying drawings in which: Figure 1 shows a side view of one preferred embodiment of the present invention; Figure 2 shows a perspective view of the embodiment shown in Figure 1; and Figure 3 shows a top plan view.

BEST MODES AND ILLUSTRATIVE EXAMPLES With respect to the figures, there is shown an in-ground shrouded (IGS) sprinkler assembly 1 which is located in the ground 100. The IGS sprinkler assembly 1 has a substantially cylindrical shroud 2 made of plastic having a substantially cylindrical wall 3 which surrounds a sprinkler assembly generally indicated by arrow 4. The sprinkler assembly has a sprinkler head 5 mounted upon an upright riser in the form of pipe 6.

The pipe 6 passes out the bottom of the shroud via aperture 7 and is connected to a water supply line 8 via a saddle clamp 9. Pipe 6 is held firmly in a vertical orientation via a lower positioning element in the form of a collar 10, and an upper positioning element in the form of a cover 11 having a central aperture (not shown), through both of which the pipe 6 passes and abuts. The top of the pipe 6 has a solenoid actuated diaphragm valve 13 attached thereto.

Connected to the valve 13 is a solenoid timer 14 which has power supplied thereto by a solar panel 15. Connected to the top of pipe 6 via the valve 13 is a sprinkler head 5.

The top of the shroud 2 has a rounded lip 16 which has connected to the top thereof an animal guard 17 made of stainless steel.

The shroud has an above ground portion A and a below ground portion B. Below ground portion B has four effectively radially extending protrusions 18 which extend out from a narrower diameter shroud wall (2B) relative to the cylindrical wall 3 of the above ground portion A. The shroud 2 also has a height management feature in the form of a line 19 which marks the boundary of the above ground and below ground engaging portions. The line 19 is created by the reduction in the diameter of the wall 3 by way of an indent C for the lower ground portion B. The ground engaging portion B of the shroud 2 also has a bottom lip 20 on which a body of soil or other substrate can sit to help prevent the shroud from easily being pulled from the ground.

James & Wells ref: 237890DIV3/79 In use the present invention can be installed by mole ploughing a 63mm LD or MD irrigation ring supply main directly into the ground. This feeds water off the mainline supply. At the calculated intervals along the ring holes will be dug and the fixed shroud and sprinkler arrangement will be tapped in using a saddle arrangement.

As the shroud is held above the ring main by the soil and not in direct contact, the pipe can be mole ploughed at variable depth.

In one preferred embodiment there is 14 individual pods on a single ring main. However there is not enough flow to sustain 14 sprinklers on a single 63mm line. Therefore individual sprinklers are switched on or off using either timers or centralised control systems. At any single instant the number of sprinklers going is matched to the capacity that can be delivered by the 63mm ring main and system.

DETAILED DISCUSSION OF ALTERNATE WAYS TO IMPLEMENT THE INVENTION The upright riser may be any suitably configured conduit to which can be connected to a pressurised water supply at one end thereof and a sprinkler head at the other. The upright riser positioning the sprinkler head within the shroud so that water stream exiting the head does impinge on said shroud.

The upright riser may be integrally formed as part of the shroud.

Alternatively the upright riser may be a separate pipe.

The upright riser may directly or indirectly connected to a water supply line via a clamping device which secures a connection between the water supply line and the upright riser.

The sprinkler head may be a self rotating sprinkler head in some embodiments.

In alternate embodiments the sprinkler head may be a nozzle.

The shroud may have a variety of different shapes and configurations without departing from the scope of the present invention.

In one embodiment the shroud may have substantially cylindrical body with an integrally formed base portion and open top end. In such an embodiment there may be provided at least one aperture in or substantially adjacent the base which facilitates connection to a water supply line.

In an alternate embodiment the shroud may have four walls and a base member.

The shroud has an internal space between the wall(s) which is dimensioned to house and allow for: - any operational movement of the sprinkler head; and/or James & Wells ref: 237890DIV3/79 - a clear exit path for a jet or stream of liquid from the sprinkler head.

The shroud may be integrally formed. In some embodiments the shroud may be formed by roto - moulding or other suitable moulding or casting technique.

The height of the wall(s) and height of the upright riser are both such as to enable liquid to be delivered from the sprinkler head without impinging on the wall(s) of the shroud. Additionally, the dimensions of the opening at the top of the shroud also enable liquid to be delivered from the sprinkler head without impinging on the wall(s) of the shroud.

The above ground portion of the shroud may preferably have a smooth exterior surface.

The above ground portion of the shroud may be cylindrical in shape.

The ground engaging portion may come in a variety of different forms without departing from the scope of the present invention.

In one embodiment the ground engaging portion includes at least one effectively radially extending protrusion which helps prevent rotation of the shroud once located in the ground. In some embodiments there may be three or four radially extending protrusions.

In further embodiments the ground engaging protrusion may include a bottom lip which can retain a layer of soil thereon to help prevent easy removal of the shroud from the ground.

In another embodiment the ground engaging portion includes a height management feature in the form of a line indicating the level to which the ground engaging portion is to be buried in the ground.

In one embodiment the above ground and ground engaging portions both include one positioning element which collectively hold the upright riser in a substantially vertical orientation.

The animal guard may come in a variety of different forms.

In one embodiment the animal guard may be in the form of a lattice or lattice like structure.

In another embodiment the animal guard may be in the form of a shield.

It is envisaged that the timer control valve may come in a variety of different forms without departing from the scope of the present invention.

In one embodiment the control valve may include or be associated with a timer or other control system such as a PLU.

In one embodiment the control valve may comprise a solenoid actuated diaphragm valve and associated timer together with an associated power supply.

James & Wells ref: 237890DIV3/79 The power supply may come from a power line.

In one embodiment the power supply may come from a solar cell.

In an alternate embodiment the power supply may come from a battery or battery pack.

Aspects of the present invention have been described by way of example only and it should be appreciated that modifications and additions may be made thereto without departing from the scope thereof as defined in the appended claims.

James & Wells ref: 237890DIV3/79

Claims (2)

WHAT WE CLAIM IS:

1. A use of an elongate shroud including: - an above ground portion; - a below ground engaging portion; and - a height management feature formed in the shroud between the above ground portion and the below ground engaging portion that is configured to indicate a level to which the ground engaging portion is to be buried in the ground to provide stability, in use, of the above ground portion, wherein the relative contribution to the overall length of the shroud that is contributed by the above ground portion and the below ground portion is such that the length that the above ground portion extends above the height management feature is substantially the same as, or greater, than the length that the below ground portion extends below the height management feature.

2. A use of a shroud as claimed in claim 1 to protect at least one sprinkler assembly in a fixed in-ground irrigation system. RX Plastics Limited by its authorised agents James & Wells Intellectual Property