JP2005210932A - Pipe rail equipped with air conditioning function for horticultural facilities - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe rail for horticultural facilities, to be easily constructed and securing smooth running of a service vehicle and efficient air conditioning without the need of maintenance. <P>SOLUTION: This pipe rail for transporting the service vehicles is connected with a water supply pipe and a drain pipe each pulled into horticultural facilities and laid down along a groove direction. Steel pipes 10R and 10L are mutually connected by threadedly engaging to sleeves 13. A sealing agent saving place 16 is formed through cutting off a part of the screw thread of the steel pipes 10R and 10L and/or the sleeve 13 along the tube axis direction so as to fill a sealing agent 15 with viscoelasticity. It is all right to install a gasket 17 or an O ring 18 if necessary. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pipe rail having a cooling and heating function that is arranged in a garden facility such as a vinyl house.

In horticultural facilities, fuel such as oil is sown in the cold season to protect the plants in the facility from the cold. In order to distribute the oil combustion heat as hot water and hot air inside the facility, piping is routed inside the facility. Oil alternative fuels such as LP gas and coal may be used, and solar heat, groundwater, geothermal heat, etc. may be used as a heat source.
In the case of warm water heating, usually 65 to 85 ° C. warm water is sent to the heat radiating pipe and the inside of the facility is kept warm by heat radiation through the pipe wall. In order to efficiently transmit the amount of heat of warm water to each part of the facility, various arrangements have been made to the layout of the heat radiating pipe, such as a direct return method and a reverse return method. When cold water is circulated through the piping equipment, it can be used as a cooling equipment for protecting plants from high temperatures in summer when the temperature rises.

Large horticultural facilities are equipped with rails for transporting work vehicles to transport fertilizers and harvest plants. When the work vehicle transport rail and the cooling / heating pipe are arranged inside the facility, the work space is partitioned by the rail and the pipe, and the workability inside the facility is significantly reduced. Therefore, it is known that the work vehicle transport rail is made hollow and the air conditioning function is also provided by feeding warm water or cold water into the rail (Non-Patent Document 1).
The 135th edition of the Horticultural Gardening Handbook (Edited by the Japan Horticultural Society, issued March 1, 2003)

  The air conditioner is laid in the garden facility by welding a straight and bent steel pipe to a predetermined length and shape according to the inner area of the garden facility and connecting it to a hot water or cold water supply source. Although the welding work is carried out at the construction site, since the entire circumference of the end face of the steel pipe is welded, an upward posture is forced, and if there is a welding defect such as a pinhole, troubles such as water leakage may occur. For this reason, skilled techniques are required for welding of steel pipes, and workability is low, resulting in an increase in the cost of installing air conditioning equipment.

  When the laid welded steel pipe is also used as a work vehicle transport rail, surface defects due to friction of the work vehicle with load are likely to occur. Surface defects not only cause the appearance of corrosion and deteriorate the appearance of the piping, but also impede smooth travel of the work vehicle, and in extreme cases, may cause through holes that cause water leakage. Although corrosion of the steel pipe surface can be suppressed to some extent by rust-proof coating, the rust-proof coating film is cracked, peeled off, etc. due to rubbing with the work vehicle.

  The present invention has been devised to solve such problems. By screwing the sleeve and connecting the steel pipes, the present invention can be easily laid without requiring skill and troubles such as water leakage. An object of the present invention is to provide a pipe rail for a horticultural facility having no durability.

The present invention is a pipe rail for work vehicle transport that is connected to a water supply pipe and a drain pipe drawn into a horticultural facility and is laid along the groove direction, and a plurality of steel pipes are screw-connected via a sleeve, A sealant reservoir formed in one or both of the sleeve and the steel pipe is filled with a viscoelastic sealant. A male screw or a female screw is engraved on the pipe end of the steel pipe, and a female screw or a male screw that meshes with the male screw or the female screw is engraved on the inner peripheral surface or the outer peripheral surface of both ends of the sleeve.
The sealant reservoir is formed by cutting out a part of the male screw or female screw in the pipe axis direction engraved on the pipe end of the steel pipe in a circumferential shape, and / or a part of the sleeve female screw or male screw in the pipe axis direction. It is formed by cutting out in a circumferential shape. Moreover, you may insert a gasket or an O-ring between the edge part side surface of a steel pipe or a sleeve, and the base end side surface of a screw engraving part.

  The pipe rail for horticultural facilities according to the present invention is laid along a groove between the ridges. The horticultural facility pipe rail is constructed by connecting a plurality of steel pipes 1 to each other or via an elbow pipe 2 made of the same material at a corner portion to form a closed circuit (FIG. 1). The partition plate 3 is incorporated into the closed circuit-shaped steel pipe, and both sides of the partition plate 3 are connected to the water supply pipe 5 and the drain pipe 6 via the connectors 4 respectively. When the hot water or cold water fed from the water supply pipe 5 is circulated through the closed circuit and recovered from the drain pipe 6, the internal temperature of the garden facility is adjusted by heat dissipation or heat absorption through the steel pipe 1.

  The steel pipe 1 can be a plain steel black skin steel pipe, stainless steel pipe, plated steel pipe, etc., but considering the cost, pipe end processing, maintenance after installation, etc., it is a galvanized steel pipe with excellent corrosion resistance, especially Zn- Al-Mg plated steel pipe is preferred. In FIG. 1, the steel pipe 1 and the elbow pipe 2 are connected in a closed circuit shape. However, the steel pipe 1 may be directly or indirectly connected to the water supply pipe 5 and the drain pipe 6 without forming a closed circuit shape.

In the closed circuit-shaped pipe rail, the longitudinal direction portion along the groove is supported by the support column 7 at an appropriate position. The distance L between the adjacent struts 7 and 7 is set to about 2 m in consideration of the bending deformation of the steel pipe 1 to which the load of the work vehicle is applied.
The length of the groove depends on the size of the horticultural facility, but it is not uncommon for large horticultural facilities to exceed 100 m. On the other hand, the steel pipe 1 forming the closed circuit is about 8 m at the longest from transportation and handling. Therefore, a closed circuit that is long in the groove direction is constructed from a plurality of steel pipes 1, and the steel pipes 1 are connected by mechanical fitting using a sleeve.

  Specifically, female sleeves 11R and 11L are formed on the inner surfaces of the end portions of the steel pipes 10R and 10L, and a sleeve 13 is used in which male screws 12R and 12L meshing with the female screws 11R and 11L are formed on both sides in the pipe axis direction. The steel pipes 10R and 10L are connected (FIG. 2). The peripheral surface of the sleeve 13 positioned between the male screws 12R and 12L is a flat surface 14 for hanging a spanner. The use of a sleeve 13 made of a Zn—Al—Mg plated steel pipe made of the same material as the steel pipes 10R and 10L is preferable from the viewpoint of corrosion resistance.

  After the male screw 12R of the sleeve 13 is screwed to the female screw 11R formed on the inner surface of the steel pipe 10R, the male screw 12L of the sleeve 13 is screwed to the female screw 11L formed on the inner surface of the other steel pipe 10L. The steel pipes 10R and 10L are connected to each other through the sleeve 13. If a thin plate cover is attached to the flat surface 14 of the sleeve 13 as necessary, the level difference between the steel pipes 10R, 10L and the sleeve 13 can be eliminated, and adhesion of dust, earth and sand to the connecting portion can be prevented. Of course, it is also possible to connect the steel pipes 10R and 10L in which the male screw is engraved on the outer surface of the end using the sleeve 13 in which the female screw is engraved on the inner surface of the end.

  When the work vehicle travels on the pipe rail, loads such as the weight of the work vehicle and fertilizers and harvested goods mounted on the work vehicle are applied to the steel pipes 10R and 10L. Although the steel pipes 10R and 10L are bent and deformed by the load, when the connecting portion is bent and deformed, a gap that causes water leakage is easily generated between the steel pipes 10R and 10L and the sleeve 13. It is possible to suppress the generation of gaps due to bending deformation by setting the connection part of the steel pipes 10R, 10L on the support column 7 (FIG. 1) and forming the screw engraved part long in the pipe axis direction. However, there is still concern about water leakage by simply engaging the female screw.

  Therefore, watertightness is improved by filling a sealant between the steel pipes 10R, 10L and the sleeve 13. As the sealant, a viscoelastic silicone system that has less volume shrinkage in the curing process after application and follows flexure deformation is preferable, and TB1211 (manufactured by ThreeBond Co., Ltd.) is commercially available.

  In order to secure the sealant 15 between the steel pipes 10R, 10L and the sleeve 13, the threads of the steel pipes 10R, 10L and / or the sleeve 13 are cut by a predetermined length along the pipe axis direction, and the sealant reservoir 16 is removed. (FIG. 3). The female screws 11R and 11L of the steel pipes 10R and 10L and the male screws 12R and 12L of the sleeve 13 are formed in a long and small pitch in the tube axis direction in order to maintain the proof stress, but in FIG. 3a, the male screws 12R and 12L are engraved. The base end side of the part is cut off to form a sealant reservoir 16. Alternatively, the sealant reservoir 16 may be formed in the center of the screw engraving portion with less stress (FIG. 3b). The center of the screw engraving portion is a portion where the deformation deformation caused when the work vehicle is traveling is the least, and is effective in suppressing the viscous flow of the sealing agent 15 flowing out from the sealing agent reservoir 16 and holding it in a predetermined position.

  In addition to filling with the sealing agent 15, watertightness is further improved by interposing a gasket or an O-ring in the connecting portion. The gasket 17 is interposed, for example, between the pipe end side surfaces of the steel pipes 10R and 10L and the base end side surface of the thread engraved portion of the sleeve 13 (FIG. 4a). The gasket 17 increases the water tightness between the steel pipes 10R, 10L and the sleeve 13, and suppresses the sealant 15 from flowing out. The O-ring 18 is mounted not only between the pipe end side surfaces of the steel pipes 10R and 10L and the base end side surface of the screw engraved portion of the sleeve 13 but also at a position spaced from the screw engraved portion base end toward the end surface of the sleeve 13. Circumferential grooves may be formed (FIG. 4b).

  The screw-type pipe joint using the sleeve 13 is basically different from the welded joint in that the steel pipe surface is not damaged. In particular, in welded joints using galvanized steel pipes for steel pipes 10R and 10L, the galvanized layer melts and deteriorates due to heat input during welding, and the original corrosion resistance is impaired. There is no deterioration. Therefore, the original corrosion resistance of galvanization can be utilized. By the way, with conventional welded joints, regular repair work using anti-corrosion paint was necessary, but the cooling and heating pipes constructed with screw-type pipe joints are virtually maintenance-free and can be used for a long time. Endure.

  Among these, when a Zn—Al—Mg alloy plated steel pipe is used for the steel pipes 10R and 10L, excellent wear resistance and high gloss can be utilized. Pipe rails (Fig. 1) are constructed with steel pipes 10R and 10L with the hard Zn-Al-Mg alloy plating layer exposed, ensuring smooth running of work vehicles loaded with fertilizer and harvested crops, Even after use, the Zn—Al—Mg alloy plating layer maintains the original beautiful high gloss surface. For example, a normal hot dip galvanized layer with high glossiness is soft and easily damaged by running a work vehicle, but a Zn-Al-Mg alloy plated layer that is much harder than a hot dip galvanized layer is used for a long time. There is almost no damage even after running. Moreover, the Zn—Al—Mg alloy plating layer has a sufficiently high glossiness. The beautiful high-gloss surface improves the visibility for workers in the gardening facility and prevents troubles such as falling on the rails.

  As described above, since the steel pipes are mechanically connected using the sleeve, the pipe rail can be laid quickly without requiring a skilled technique such as a welded joint, and the laying cost can be reduced. When constructing pipe rails with plated steel pipes, the corrosion resistance inherent to the plating layer is utilized, rust-proof coating after installation is unnecessary, and maintenance-free operation that can be used for smooth running of work vehicles and efficient cooling and heating of garden facilities over a long period of time. Pipe rail for garden facilities.

Schematic perspective view of the pipe rail laid in the gardening facility Cross section of a pipe joint using a sleeve Two examples of pipe fittings with a sealant reservoir Two examples of pipe joints with gaskets or O-rings

Explanation of symbols

1: Steel pipe 2: Elbow pipe 3: Partition plate 4: Connector 5: Water supply pipe 6: Drain pipe 7: Strut 10R, 10L: Steel pipe 11R, 11L: Female thread 12R, 12L: Male thread 13: Sleeve 14: Flat surface 15 : Sealing agent 16: Sealing agent reservoir 17: Gasket 18: O-ring

Claims (6)

  It is a pipe rail for work vehicle transport that is connected to the water supply pipe and drain pipe drawn into the horticultural facility and is laid along the groove direction. A plurality of steel pipes are screwed through the sleeve, and the sleeve and steel pipe A pipe rail for a horticultural facility having a cooling and heating function, wherein a viscoelastic sealant is filled in a sealant reservoir formed in one or both of them.   The pipe rail for a horticultural facility according to claim 1, wherein a female screw or a male screw that meshes with a male screw or a female screw engraved at a pipe end of the steel pipe is engraved on both peripheral surfaces of the sleeve.   The pipe rail for a horticultural facility according to claim 2, wherein a part of the male screw or the female screw engraved on the pipe end of the steel pipe is cut in a circumferential shape to form a sealant reservoir.   The pipe rail for a gardening facility according to claim 2, wherein a part of the female screw of the sleeve or a part of the male screw in the tube axis direction is circumferentially cut to form a sealant reservoir.   The proximal side surface of the screw engraving portion formed between the proximal end side surface of the screw engraving portion formed at the pipe end of the steel pipe and the end end side surface of the sleeve, or the end side surface of the steel pipe and both ends of the sleeve. A pipe rail for a horticultural facility according to claim 1, wherein a gasket or an O-ring is inserted therebetween.   5. A circumferential groove is formed by cutting a screw thread located at a position spaced apart from the base end of the threaded portion of the steel pipe or sleeve in the direction of the pipe end, and an O-ring is inserted into the circumferential groove. Pipe rails for garden facilities as described.

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