FI79232C - BEVATTNINGSANORDNING SAMT FOERFARANDE FOER TILLVERKNING AV ANORDNINGEN. - Google Patents

Description

T-79232

IRRIGATION DEVICE AND METHOD OF MANUFACTURING THE DEVICE -BEVATTNINGSANORDNING SAMT FÖRFARANDE FÖR TILLVERKNING AV ANORDNINGEN

The invention relates to a porous irrigation device as defined in the preambles of claims 1 and 4 and to a method for manufacturing the irrigation device.

In the conventional automatic plant dipping method, the liquid is conveyed through a porous material, usually a fabric or wire, from the liquid source to the object to be irrigated. Liquid transport is based on the absorption of liquid into the pores of the fabric and the movement along the pores towards the drier area, in this case the target to be irrigated, due to the force of the capillary-15.

The disadvantages of the fabrics and yarns used are the relatively large pore size, which is why it is usually necessary to use a fairly thick and dense fabric. One of the disadvantages of the fabrics is their poor water-lifting ability due to the porous properties of the fabric.

When in constant contact with standing and possibly fertilized water, the fabrics provide a good breeding ground for molds, fungi, etc. micro-25 for them. This can cause odor nuisances and other problems, and the life of the material is shortened. Frequent replacement of fabrics is cumbersome and also incurs unnecessary additional costs.

The object of the invention is to eliminate the aforementioned drawbacks. In particular, the object of the invention is to provide, for example, a fixed-frame irrigation device suitable for automatic irrigation of plants, the characteristics of which are e.g. durability and efficient fluid transfer based on good water lifting capacity. It is also an object of the invention to provide a manufacturing method for obtaining the advantageous porous properties of an irrigation device.

For the features of the invention, reference is made to claim 2 79232.

The solid porous irrigation device according to the invention is mainly rod-shaped and comprises Kapil laurel pores. The liquid transfer properties based on the water-lifting capacity 5 of the capillary pores are well suited for the use of an irrigation device, e.g. in automatic irrigation of plants. According to the invention, the irrigation device comprises substantially additional pores of the length of the device, opening at the ends, which have been made in connection with the manufacture of the device. The diameter of the additional pores may vary. Additional pores improve fluid transfer properties.

In a preferred embodiment of the invention, the irrigation device consists mainly of a list of ceramic materials, i. burnt clay. The ceramic irrigator is durable and has excellent fluid transfer properties.

The irrigation device may also consist of another material, e.g. plastic.

In the method of manufacturing the porous irrigation device according to the invention, the clay mass is pressed through a nozzle in order to obtain water-lifting properties suitable for irrigation. The irrigation devices formed are burned by a method known per se in connection with the burning of bricks. According to the invention, larger additional pores of the length of the device are made in the irrigation device, which open at the ends of the device.

In a preferred embodiment, the additional pores are made by wire-like members inside the nozzle which project along the nozzle to be compressed through the nozzle at a distance in the direction of the nozzle. Since compression no longer occurs outside the nozzle, the additional pores formed from the wire-like members inside the irrigation device are not substantially eliminated.

The advantage of the irrigation device according to the invention compared to the known technology is in particular the durability of the devices, the excellent fluid transfer capacity, the ability to change the shape, the suitability for small and large irrigation objects indoors and outdoors.

The advantages of the manufacturing method which is the subject of the invention are the formation of water-conducting properties which are important for the irrigation device. In addition, when manufacturing a ceramic irrigation device, the size of the capillary pores can be controlled during the firing step.

The invention will now be described in detail with reference to the accompanying drawing, in which Figure 1 shows a front view of an irrigation device according to the invention, Figure 2 shows a cross-section II-II of the irrigation device according to Figure 1, Figure 3 shows a nozzle-15 structure used in the invention. shows a cross-section IV-IV of the nozzle structure according to Fig. 3.

According to Figures 1 and 2, a preferred fixed, porous irrigation device 6 has a cylindrical shape 20 and is elongate. The device 6 comprises capillary pores 1 and additional pores 2 of substantially larger diameter, which open to the ends 4, 5 of the length of the device.

The irrigation device 5 consists mainly of burnt clay 25. In such a ceramic irrigation device, the finest material is deposited on the surface 3 of the device, whereby the surfaces of the untreated ceramic device are dense. The device 6 comprises roughened ends 4, 5 for exposing the pores 1, 2. In this case, the surface 3 of the jacket of the device 30 is tight and the liquid moves mainly through the ends of the device in the longitudinal direction of the device and in the direction of the arrows 12. The tight surface of the sheath can be partially or completely removed to expose the capillary pores, whereby the liquid also transfers well from the treated surfaces 3 of the sheath. It is also possible to use coatings. When, for example, the jacket includes a liquid-impermeable coating, the liquid is transferred only from the ends of the device 4 79232.

The placement of the irrigation device 6 in the object to be irrigated takes place e.g. by placing one end 5 of the device in the liquid source with the projections 5 of the other end 4 through the bottom of the pot or box above the liquid source in the plant medium, i.e. mold.

Figure 3 shows a nozzle structure used in the invention, comprising a nozzle 7 to be connected to a compression unit, a nozzle plate 8 10 with openings 9 connected to the nozzle end and wire-like members 10 connected to a support member 11 inside the nozzle. The ends of the wire-like members are free to protrude through the openings 9 of the nozzle plate outside the nozzle at a distance from the nozzle plate. The wire-like members 10 are e.g. metal-15 wire. The diameter of the nozzle openings 9 and the diameter of the wires 10 may vary as needed, as may the number of openings and wires. A screw unit can be used, for example, a helical press.

In the manufacture of the irrigation device 6, a moist mass consisting of e.g. clay, sand and crushed stone in suitable proportions is pressed through a nozzle 7. In this case, capillary pores 1 are formed inside the irrigation device 1. In addition, the wire-like members 10 in the nozzle, which protrude from the openings 9 of the nozzle plate 8 with the mass, create additional longitudinal pores 2 inside the irrigation device formed. The formed irrigation devices are dried and burned.

Devices 30 6 which protrude from a nozzle having a plurality of openings 9 and which may adhere to each other can be detached from each other immediately after the pressing step with the aid of metal wire, knives or the like. Ir removal can also be performed after the combustion step, e.g. by sawing.

The surfaces 3 of the devices become compact during the drying step 35, so that the cutting of the devices into pieces of suitable length is carried out only after the drying or firing step in order to expose the pores. Pa- 79232 lapping is performed, for example, by sawing, whereby the surfaces of the ends 4, 5 are made rough. The surfaces 3 of the irrigation device jacket can also be roughened after the drying and / or firing step. In addition, the surfaces of the device can be coated, for example, to hold liquid.

The example is in no way intended to limit the invention to this example only, but many modifications are possible within the scope of the inventive idea defined by the following claims.

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Claims (5)

6 79232 A porous irrigation device (6) for use in fluid transfer, e.g. in automatic irrigation of plants, consisting of a solid, mainly rod-like body containing capillary pores (1), characterized in that the device (6) comprises substantially end-to-end lengths (4, 5) opening larger additional pores (2). Irrigation device according to Claim 1, characterized in that the device (6) consists essentially of a ceramic material. Irrigation device according to Claim 2, characterized in that the surface 15 (3) of the jacket of the device (6) is sealed, the liquid passing only through the ends (4, 5) of the rod-like device. A method of manufacturing a solid porous irrigation device for use in irrigating plants, wherein the clay mass is pressed through a nozzle (7) 20 and the formed irrigation devices are incinerated, characterized in that additional pores (2) of substantially length are formed when the clay mass is pressed through the nozzle (7). Method according to Claim 4, characterized in that the additional pores (2) are formed by wire-like elements (10) projecting inside the nozzle (7) with the compressible mass through the nozzle at a distance from the nozzle.