JP2006062734A - Piping for fuel oil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide piping for fuel oil which can prevent the fuel oil from leaking, is excellent in safety and durability, and also, can increase the working efficiency by reducing the weight. <P>SOLUTION: This piping for fuel oil is embedded under the ground of the site 1 of a fuel station, and has a duct 17 through which a fuel oil is made to flow. At the same time, the piping for fuel oil is equipped with a shell tubular section 14 made of a resin material which is thick enough to keep a mechanical strength, and an internal surface covering section 16 made of the other resin material which is bonded to the internal wall surface on the duct 17 side of the outer shell tubular section 14 through an adhesive layer 15, and has shielding property for preventing the fuel oil from permeating. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fuel oil pipe for distributing fuel oil buried underground in a site of a gas station.

2. Description of the Related Art Conventionally, a fuel tank that stores fuel oil such as gasoline that is buried underground in a gas station and a fueling device that is installed on the ground communicate with each other through a fuel pipe that is buried underground. For example, the applicant of the present invention has made a lubrication management for a gas station where the oil storage tank buried underground and the oil supply device are communicated with each other through an oil supply pipe, and between the oil storage tank and the oil supply port on the ground are communicated with an oil supply pipe. The technique regarding an apparatus is disclosed (for example, refer patent document 1). Conventionally, steel pipes have been used as oil supply pipes or oil supply pipes buried in the ground through which fuel oil flows.
JP 2001-2197 A (pages 2 and 3, FIG. 1)

  All of the oil pipes or oil supply pipes buried underground in conventional gas stations have been made of steel pipes, so there are holes due to soil corrosion, fuel oil flowing through the inside, leaking, safety problems such as fires, or There was a risk of environmental problems such as soil contamination. In addition, the steel pipe is heavier and the working efficiency may be reduced.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fuel oil pipe that can prevent leakage of fuel oil, is excellent in safety and durability, can be reduced in weight, and work efficiency can be improved.

  In order to achieve the above-mentioned object, the invention according to claim 1 is a fuel oil pipe embedded in the basement of a site of a gas filling station through which fuel oil flows, and has a pipe line through which the fuel oil flows. In addition, an outer shell tube portion made of a resin material having a thickness that retains mechanical strength, and a shield that is bonded to an inner wall surface of the outer shell tube portion on the pipe line side through an adhesive layer to prevent the fuel oil from permeating. A fuel oil pipe comprising an inner surface shielding portion made of another resin material having performance.

  In the invention according to claim 2, the resin material of the outer shell tube part is a polyethylene resin, and the other resin material of the inner surface shielding part is an ethylene / vinyl alcohol copolymer resin. 2. The fuel oil pipe according to claim 1, wherein

  The fuel oil pipe according to claim 1, wherein the adhesive layer is made of a modified polyethylene material.

  A fuel oil pipe buried in the basement of a gas station where fuel oil circulates, and having an outer shell pipe portion made of a resin material having a thickness for maintaining mechanical strength while having a pipe line through which the fuel oil flows; By providing an inner surface shielding portion made of another resin material that is bonded to the inner wall surface of the outer shell tube portion on the pipe line side through an adhesive layer and has a shielding performance for preventing permeation of fuel oil, fuel oil leakage Can be prevented, is excellent in safety and durability, and can be reduced in weight to improve work efficiency.

  Hereinafter, the present invention will be specifically described with reference to an illustrated embodiment. 1 and 2 are diagrams illustrating an oil pipe according to an embodiment of the present invention. FIG. 1 is a cross-sectional view of a fuel oil pipe, and FIG. 2 is a diagram illustrating an apparatus at a filling station in which the fuel oil pipe is used. It is.

  In these drawings, a refueling device 20 is installed in a site 1 of a gas station, and an underground tank 2 storing fuel oil such as gasoline is embedded in the basement of the site 1. The oil supply device 20 has an oil supply mechanism having an oil supply pump (not shown) in the device main body 21 formed in a case shape, and a display for displaying the amount of oil supply on the front side of the operation side of the device main body 21. A vessel 22 is provided. The underground tank 2 and the oil supply pump of the oil supply device 20 communicate with each other through the fuel oil pipe 10 according to the embodiment of the present invention. The fuel oil pipe 10 includes, for example, a rising pipe 11 that rises underground from the upper part of the underground tank 2 and a horizontal pulling pipe 12 that is connected to the rising pipe 11. The rising pipe 11 is communicated with a pipe having a lower end portion extending below the surface of the fuel oil in the underground tank 2, and the upper end portion is exposed in a manhole 24 formed on the surface of the site 1 through the ground. Yes. The horizontal pipe 12 is connected so that one end side thereof communicates with the upper end portion of the rising pipe 11 and the L-shaped connecting portion 13 in the manhole 24, and the other end side passes horizontally through the ground and the lower portion of the oil supply device 20. It faces the lower part side of the oil supply pit 23 formed in this. The other end of the horizontal pulling pipe 12 is communicated with the oil pump of the oil supply device 20 through the oil supply pit 23 by a steel pipe such as an oil supply pipe. That is, the fuel oil pipe 10 is configured such that the fuel oil in the fuel tank 2 flows from the rising pipe 11 through the connecting portion 13 to the horizontal pulling pipe 12 by the fuel pump of the fuel supply device 20. Therefore, the pressure when fuel oil is sucked by the fuel pump is applied to the fuel oil pipe 10.

  As shown in FIG. 1, the fuel oil pipe 10 constituted by the rising pipe 11 or the horizontal pulling pipe 12 has an outer diameter in which a pipe line 17 through which fuel oil can flow at a necessary flow rate is formed. The outer shell tube portion 14 made of a plastic material having a thickness capable of maintaining mechanical strength, and the permeation of fuel oil such as gasoline bonded to the inner wall surface side of the outer shell tube portion 14 via the adhesive layer 15 It is formed with the inner surface shielding part 16 which consists of a resin material which has the shielding performance which can prevent. For example, polyethylene, which is a crystalline resin obtained by polymerization of ethylene, is used for the outer shell tube portion 14, and the size is suitable for the flow rate and strength, and the outer diameter is about 60 mm. The one having a wall thickness of about 5.5 mm is used. For example, an ethylene / vinyl alcohol copolymer resin that is a crystalline resin obtained by completely hydrolyzing an ethylene / vinyl acetate copolymer resin that is a copolymer of ethylene and vinyl acetate is suitable for the inner surface shielding portion 16. The resin used for the inner surface shielding portion 16 is a material having excellent shielding performance capable of preventing the passage of fuel oil such as gasoline, and is formed to have a thickness of about 0.2 to 0.3 mm, for example. The The adhesive layer 15 is made of a modified polyethylene material that can improve the adhesion between the polyethylene of the outer shell tube portion 14 and the ethylene / vinyl alcohol copolymer resin of the inner surface shielding portion 16. It has been confirmed that the adhesive layer 15 can firmly perform adhesion between the outer shell tube portion 14 made of polyethylene resin and the inner surface shielding portion 16 made of ethylene / vinyl alcohol copolymer resin. It was recognized that peeling can be prevented because it has the property of absorbing the difference in thermal expansion between the outer shell tube portion 14 and the inner surface shielding portion 16 due to the change.

  The fuel oil pipe 10 of the present embodiment is, for example, a long coil shape corresponding to the thickness or a constant length of about 5 meters, and if necessary, a resin material for heat fusion by electric heating It is used by connecting it in a straight line or L-shape with a socket or elbow made of.

  The fuel oil pipe 10 having the above-described configuration is formed of a plastic material such as polyethylene that allows the outer shell pipe portion 14 to flow a necessary flow rate and has mechanical strength, and an inner surface side thereof is interposed through the adhesive layer 15. Since the inner surface shielding portion 16 made of a resin material having a shielding performance capable of preventing permeation of fuel oil is adhered, the fuel does not corrode like a conventional steel pipe and passes through the pipe line 17. Oil is not transmitted to the outside by the inner surface shielding portion 16. If only the outer shell tube portion 14 using a polyethylene material is used, the fuel oil such as gasoline can easily permeate and leak to the outside unless the wall thickness is sufficiently increased. In the present invention, it is possible to reduce the weight as compared with the case where a conventional steel pipe is used by making the outer shell pipe portion 14 large enough to flow a necessary flow rate and having a mechanical strength. And piping work becomes easy. Further, the adhesive layer 15 made of a modified polyethylene material has a property of being able to firmly adhere and absorb the difference in thermal expansion, so that peeling is prevented, and the bending strength of the fuel oil pipe 10 as a whole is increased. Can be improved.

  In the above embodiment, the example in which the fuel oil pipe 10 is used as the rising pipe 11 or the horizontal pipe 12 has been described. However, the fuel oil pipe 10 can be applied to at least a pipe buried in the underground and through which the fuel oil flows. It can be applied to an oil supply pipe in which the vapor of the gas flows. Further, the shape and thickness of the outer shell tube portion 14 and the thickness of the inner surface shielding portion 16 are examples, and are not limited to the embodiment.

  It can be used for fuel oil piping for circulating fuel oil buried underground in a gas station.

It is sectional drawing of piping for fuel oil of this invention embodiment. It is a figure explaining the apparatus of the gas station where the piping for fuel oil of this embodiment was used.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Site 2 Underground tank 10 Fuel oil piping 11 Standing piping 12 Horizontal piping 13 Connection part 14 Outer shell pipe part 15 Adhesive material layer 16 Inner surface shielding part 17 Pipe line 20 Oil supply apparatus 21 Apparatus main body 22 Display 23 Oil supply pit 24 Manhole

Claims (3)

A fuel oil pipe embedded in the basement of a gas station site through which fuel oil circulates, and having an outer shell pipe made of a resin material having a pipe line through which the fuel oil flows and having a thickness that maintains mechanical strength And an inner surface shielding portion made of another resin material having a shielding performance for preventing permeation of the fuel oil, which is bonded to the inner wall surface of the outer shell tube portion on the pipe line side through an adhesive layer. Fuel oil piping. 2. The fuel oil pipe according to claim 1, wherein the resin material of the outer shell tube portion is a polyethylene resin, and the other resin material of the inner surface shielding portion is an ethylene / vinyl alcohol copolymer resin. . The fuel oil pipe according to claim 1, wherein the adhesive layer is made of a modified polyethylene material.

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