JP2006050948A - Watering tool and watering porous pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a watering tool enabling watering all over in a length direction. <P>SOLUTION: The watering tool is provided with a net body 2 in contact with the lower surface of a porous pipe 1. The watering tool has the following mechanism: water seeping out from the porous pipe 1 moves on the surface of the porous pipe 1, transfers to a filament 2a forming the net body 2, is handed down along the filament 2a, and falls from the lowest point of the filament 2a or from an intersecting point in the vicinity of the lowest point. According to such a mechanism, if the porous pipe 1 sags, the water turns into water drops 4 and falls at intervals shorter than the pitch of the filament 2a so as to water all over toward a wall surface in its length direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an irrigation tool and an irrigation porous pipe suitable for wall surface greening, wall surface cooling / heating / washing, washing of a wall surface coated with an air purification photocatalyst, and the like.

In recent years, greening of walls, water cooling of buildings, air purification, etc. are being put into practical use for the purpose of suppressing heat islands, reducing cooling costs, and reducing CO ₂ , and along with this, the development of wall irrigation technology has been actively carried out. ing.
Incidentally, the planting base provided on the wall of the building is irrigated in the wall greening, the building wall formed of a material having high water retention (hydrophilicity) is irrigated in the water cooling of the building, and the photocatalyst (exhaust gas) is irrigated in the air purification. Water is irrigated to clean roadside fences, soundproof walls, tunnel inner walls (light source required), building walls and glass surfaces, etc.

  The irrigation has been conventionally performed by a drop-drop method or a spray / fountain method using a perforated pipe. However, the former has a reduced amount of water near the end of the pipe, and the latter is easily affected by wind. The whole could not be irrigated stably in the length direction.

  For these reasons, the present inventors have proposed a watering method using a foamed resin porous pipe (Patent Document 1). In the porous pipe, water oozes out to the pipe surface through the continuous foaming channel of the pipe wall, but since the continuous foaming channel has a large radial flow resistance (pressure loss), the pipe end portion But enough water will ooze out. Moreover, since a large number of communication foaming channels are distributed, water oozes out continuously in the length direction. Therefore, the walls are uniformly irrigated.

  However, as shown in FIG. 6, when the porous pipe is fixed to the wall surface with a space therebetween, bending occurs between the fixtures 12, and the water that has oozed out of the porous pipe 1 forms the surface of the porous pipe 1. It moves and gathers in the bent trough 1a, and drops from there as water droplets 4. Therefore, there is a problem that only the lower part of the bent valley portion 1 a is irrigated, and irrigation is not continuously performed in the length direction of the porous pipe 1. In FIG. 6, reference numeral 1b denotes a bending peak of the porous pipe, and the vertical distance H (mm) between the lower surface of the valley 1a and the lower surface of the peak 1b is the bending amount.

JP 2001-329095 A

  An object of the present invention is to provide an irrigation device and a porous pipe for irrigation that can uniformly irrigate in the length direction.

  The invention according to claim 1 is the irrigation device characterized in that a net-like body is provided below the porous pipe.

  The invention according to claim 2 is the irrigation device characterized in that a net-like body is provided in contact with the lower surface of the porous pipe.

  A third aspect of the present invention is the irrigation device according to the first aspect, wherein the net-like body is any one of a lower part in the net-like tube, a net-like ridge, and a net-like plate.

  A fourth aspect of the present invention is a irrigation porous pipe, characterized in that a ring-shaped protrusion is provided on the outer periphery of the porous pipe.

  The invention according to claim 5 is the irrigation porous pipe characterized in that a spiral projection is provided on the outer periphery of the porous pipe.

  Since the invention according to claim 1 is an irrigation device in which a net-like body is provided below the porous pipe, the water exuded from the porous pipe moves to the lower surface of the porous pipe and from there on the filament constituting the net-like body Drops as water droplets, and again drops as water droplets from the lowest point of the filament or the intersection in the vicinity thereof. Therefore, irrigation is uniformly performed on the entire wall surface 5.

  The invention according to claim 2 is an irrigation device in which a net-like body is provided in contact with the lower surface of the porous pipe, so that water that has oozed out of the porous pipe moves to the filament constituting the net-like body by moving on the surface of the porous pipe. Transfers, travels down the filament, descends, and falls as water droplets from the lowest point of the filament or its intersection. Therefore, even if the porous pipe is bent, water falls at intervals equal to or less than the pitch of the filament, and irrigation is uniformly performed on the entire wall surface.

  The invention according to claim 3 is an irrigation device in which the mesh body is any one of the lower part in the mesh tube, the mesh basket, and the mesh plate, all of which can be easily manufactured and attached to the porous pipe.

  Since the invention according to claim 4 is a irrigation porous pipe having a ring-shaped protrusion provided on the outer periphery of the porous pipe, the water exuded from the porous pipe moves on the surface of the porous pipe and transfers to the ring-shaped protrusion. Then, it moves down the surface of the ring-shaped protrusion and descends, and drops as a water droplet from the lowest point of the ring-shaped protrusion. Therefore, even if the porous pipe is bent, water drops fall at intervals equal to or less than the pitch of the ring-shaped protrusions, and irrigation is uniformly performed on the entire wall surface.

  Since the invention according to claim 5 is a porous pipe for irrigation in which a spiral projection is provided on the outer periphery of the porous pipe, the water oozed from the porous pipe moves on the surface of the porous pipe and transfers to the spiral projection. Then, it moves down the surface of the spiral projection and descends, and drops as a water droplet from the lowest point of the spiral projection. Therefore, even if the porous pipe is bent, water drops fall at intervals equal to or less than the pitch of the spiral protrusions. Therefore, irrigation is performed uniformly over the entire wall surface.

  As shown in FIGS. 1 (a) and 1 (b), the invention described in claim 1 is an irrigation device 3 in which a mesh body (lower part in a mesh tube) 2 is provided below a porous pipe 1 held almost horizontally. Yes, the water that has oozed out of the porous pipe 1 moves to the lower surface of the porous pipe 1 and drops from there as water droplets 4 on the filaments 2a constituting the reticulated body 2, and the lowest point of the filament or its vicinity It drops as water droplets from the intersection. Therefore, irrigation is uniformly performed on the entire wall surface 5.

  In the first aspect of the present invention, in order to hold the porous pipe substantially horizontally, a method of suspending the porous pipe on a high tensile strength wire stretched horizontally can be applied. In addition, a method of using a highly rigid material for the mesh body, holding it horizontally, and placing the porous pipe thereon can also be applied. In this case, the porous pipe contacts the mesh. Examples of the highly rigid material include a metal material such as iron and a plastic material such as high-density polyethylene.

  In the present invention, a foamed resin porous pipe having a large radial flow resistance is preferably used as the porous pipe. In particular, it is desirable that a porous pipe made of polyvinyl chloride resin having a porosity of 40 to 60% and an open cell ratio of 50 to 70% bleeds out even at the end portion.

As shown in FIG. 2, the invention according to claim 2 is an irrigation device 3 provided with a net 2 in contact with the lower surface of the porous pipe 1, and the water that has oozed out of the porous pipe 1 is the porous pipe 1. Is transferred to the filament 2a constituting the reticulate body 2, descends along the filament 2a, and drops as a water droplet 4 from the lowest point of the filament 2a or an intersection in the vicinity thereof. Accordingly, even if not deflected porous pipe 1, the water will fall by a pitch P ₁ following intervals filaments 2a, irrigation is Nakunasa evenly throughout the wall (not shown).

  The invention according to claim 3 is the irrigation device according to claim 1 or 2, wherein the mesh body is a lower part in the mesh tube, a mesh basket or a mesh plate, both of which are easy to manufacture and attach to a porous pipe. Yes.

  Although any material can be used as the material for the mesh body, the resin material is desirable because it is lightweight and has excellent water resistance. Since polyethylene resin, vinyl chloride resin, polyamide resin (nylon), etc. are soft, they are easy to adapt to the shape of the porous pipe, and the exudate easily transfers to the filament. High-density polyethylene filaments are rich in rigidity, easy to handle and excellent in workability.

  In the present invention, if the length of the mesh tube is set in the longitudinal direction, the porous pipe can be easily maintained and replaced, and the maintainability is improved.

  In the present invention, the mesh-like body is a braided multi-hole plate, a multi-hole tube in which the multi-hole plate is formed into a cylindrical shape, or a multi-hole punch formed into a semicircular cross section. The same effect can be obtained.

As shown in FIG. 3, the invention described in claim 4 is an irrigation porous pipe 10 in which a ring-shaped protrusion 8 is provided on the outer periphery of the porous pipe, and the water that has oozed out of the porous pipe 10 is the porous pipe 10. The surface of the ring-shaped protrusion 8 is moved and moved down, and the surface of the ring-shaped protrusion 8 is moved down and falls as a water droplet 4 from the lowest point of the ring-shaped protrusion 8. Thus even if deflected porous pipe 10, water droplets 4 fall in pitch P ₂ following interval of the ring-shaped projection 8, irrigation is Nakunasa evenly throughout the wall.

  In the invention according to claim 4, the drop interval of the water droplets can be easily controlled by adjusting the pitch of the ring-shaped projections or the spiral projections.

  In the invention according to claim 4, the ring-shaped protrusion can be formed by a method of intermittently removing the outer periphery of the porous pipe, a method of attaching a ring material to the outer periphery of the porous pipe, or the like. Any material can be used for the ring material.

As shown in FIG. 4, the invention described in claim 5 is a irrigation porous pipe 11 in which a spiral projection 9 is provided on the outer periphery of the porous pipe, and water exuding from the porous pipe 11 is the porous pipe 11. The surface of the spiral projection 9 is moved to the spiral projection 9, and the surface of the spiral projection 9 is moved down to fall as a water droplet 4 from the lowest point of the spiral projection 9. Thus even if deflected porous pipe 10, water droplets 4 fall in pitch P ₃ following spacing of the helical protrusions 9. Therefore, irrigation is uniformly performed on the entire wall surface.

  In the invention according to claim 5, the drop interval of the water droplets can be easily controlled by adjusting the pitch of the ring-shaped protrusions or the spiral protrusions.

  The spiral projection in the invention of claim 5 can be easily formed at the time of extrusion molding, but it can be formed by continuously removing the outer periphery of the porous pipe spirally or by winding the band material spirally. Any material can be used for the strip.

  The irrigation device and irrigation porous pipe of the present invention can be used for spraying liquid insecticides and liquid fertilizers in addition to irrigation.

  Hereinafter, the present invention will be described in detail with reference to examples.

  100 parts by weight of polyvinyl chloride having a polymerization degree of 2500, 100 parts by weight of a plasticizer, 3 parts by weight of a stabilizer, 46 parts by weight of a filler, 0.5 parts by weight of a foaming agent (azodicarbonamide) are blended into a pipe molding die. And extruded at a temperature of 160 to 170 ° C. to produce a porous pipe having an outer diameter of 21 mm and an inner diameter of 16 mm. The wall of the porous pipe had a porosity of 50% and a continuous porosity of 60%.

  On the other hand, a high-density polyethylene filament (diameter 1.5 mm) with a circular cross section is braided, and the outer diameter is 29 mm, the inner diameter is 23 mm, the knitting angle (θ) is 50 degrees, and the knitting pitch is 7 as shown in FIGS. , 15 and 30 mm mesh pipes were produced, and the porous pipe was inserted into the mesh pipe to produce a irrigation tool having a length of 10 m.

  The upper part of the mesh tube was split in the length direction so that the porous pipe could be easily inserted and maintained.

  The irrigation device was fixed to a fixing device installed on the wall surface of the building at intervals of 1 m. The porous pipe was suspended on a steel wire placed in a mesh tube and held almost horizontally. That is, here, the lower part in the mesh tube was positioned below the porous pipe with a space (see FIG. 1).

Into the porous pipe of the irrigation device, 2 liters of water per minute was poured at a water pressure of 0.1 MPa to irrigate the wall surface. The porous pipe was kept almost horizontal even when water was passed.
The distance in the length direction of water drops falling from the irrigation device and the amount of water dropped at the start, middle and end in the length direction were examined.

A watering tool was manufactured by the same method as in Example 1 except that the porous pipe was not suspended from the steel wire, and the dropping state of water droplets was examined by the same method as in Example 1. Here, the porous pipe was in contact with the inner surface of the lower part of the mesh tube. The irrigation device was bent by flowing water.
The distance in the length direction of water drops falling from the irrigation device and the amount of water dropped at the start, middle, and end in the length direction were examined in the same manner as in Example 1. Further, the amount of deflection of the irrigation device was examined.
The amount of deflection of the irrigation tool is indicated by a vertical distance H (see FIGS. 2 and 6) between the lower surface of the valley 1a of the porous pipe and the lower surface of the peak 1b of the porous pipe on the fixture 12.

  A irrigation device was manufactured by the same method as in Example 2 except that a reticulated rod was used instead of the reticulated tube and a porous pipe was arranged therein, and the falling state of the water droplets and the amount of deflection were examined.

  A irrigation device was manufactured by the same method as in Example 2 except that a mesh plate was used instead of the mesh tube and a porous pipe was arranged thereon, and the drop state and the amount of deflection of the water droplet were examined.

  As Comparative Example 1, the drop state of the water droplet and the amount of deflection were examined by the same method as in Example 2 except that only the porous pipe was used instead of the irrigation tool.

  As Comparative Example 2, the drop state of water drops and the amount of deflection were examined by the same method as in Example 1 except that a hard perforated pipe was used instead of the irrigation tool.

  The investigation results of Examples 1 to 4 and Comparative Examples 1 and 2 are shown in Table 1. The drop interval of the water droplets and the deflection of the irrigation device were measured between the fixtures, and the average values were shown.

As is clear from Table 1, in the irrigation tools of Examples 1 to 4 (examples of the present invention), water drops dropped at intervals equal to or less than the pitch interval of the filaments. In addition, almost the same amount of water dropped from the beginning to the end of the irrigation device. For this reason, the walls were uniformly irrigated.
On the other hand, in the comparative example 1, since the porous pipe was used, the water droplet fell only from the bending trough part of the porous pipe. In Comparative Example 2, since a perforated pipe was used, no water drops dropped at the end of the pipe, and none of the walls could be uniformly irrigated.

  A plurality of vinyl chloride resin rings (outer diameter 25 mm, inner diameter 21 mm, thickness 1 mm) are fitted into the same porous pipe used in Example 1 at equal intervals to form an irrigation porous pipe. Water was allowed to flow in the same manner as in Example 1 to examine the drop state of water droplets. The interval (pitch) between the ring-shaped protrusions was variously changed.

  Except for providing a spiral projection (height 2 mm, width 1 mm) on the outer periphery of the porous pipe, the porous pipe was extruded by the same method as in Example 1, and the dropping state of water droplets was checked by the same method as in Example 1. Examined. The pitch of the ring-shaped protrusions was changed variously.

  The results of Examples 5 and 6 are shown in Table 2. The drop interval of the water droplets and the deflection of the irrigation device were measured between the fixtures, and the average values were shown.

  As is apparent from Table 2, in the porous pipe for irrigation of Examples 5 and 6 (examples of the present invention), water drops fall at intervals equal to or less than the pitch interval of the filaments, and are almost the same from the start end to the end of the irrigation device. The amount of water has fallen. For this reason, the walls were uniformly irrigated.

(A) is front explanatory drawing which shows embodiment of the irrigation tool of this invention, (b) is side explanatory drawing. It is front explanatory drawing which shows other embodiment of the irrigation tool of this invention. It is front explanatory drawing which shows embodiment of the porous pipe for irrigation of this invention. It is front explanatory drawing which shows other embodiment of the porous pipe for irrigation of this invention. (A) is a front explanatory view of a mesh tube used in the present invention, (b) is an AA cross-sectional explanatory view in FIG. 4 (a), and (c) is a BB cross-sectional explanatory view. It is front explanatory drawing which shows the conventional irrigation method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Porous pipe 1a Porous valley part of 1b porous pipe 1b Crest part of 2nd porous pipe 2 Net body 2a Filament which comprises a net body 3 Irrigation tool 4 Water drop 5 Wall surface 8 Ring shape provided in the outer periphery of a porous pipe constituting a protrusion 9 porous pipe outer circumference provided with helical projections 10 periphery in a ring-like projection a provided a watering for porous pipe porous for 11 watering provided a spiral protrusion on the outer peripheral pipe 12 fasteners P ₁ meshwork of filaments of the pitch P ₂ ring projection pitch P ₃ spiral projection pitch of

Claims (5)

  An irrigation device, wherein a net-like body is provided below a porous pipe.   An irrigation device, wherein a net-like body is provided in contact with a lower surface of a porous pipe.   The irrigation device according to claim 1 or 2, wherein the mesh body is any one of a mesh tube lower part, a mesh basket, and a mesh plate.   A porous pipe for irrigation, wherein a ring-shaped protrusion is provided on the outer periphery of the porous pipe.   A porous pipe for irrigation, wherein a spiral protrusion is provided on the outer periphery of the porous pipe.

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