JPS63231085A - Hose - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hose for supplying alcohol or alcohol mixed fuel, which is installed, for example, at a gas station for supplying fuel to automobiles and the like.

[Conventional technology and its problems]

In addition to gasoline and diesel oil, such fueling stations may handle alcohol such as methanol as fuel for automobiles, and may install an alcohol or alcohol mixed fuel supply device in addition to the gasoline refueling machine.

It is conceivable to use a rubber hose similar to that used for gasoline refueling machines as the hose for the supply device used for this alcohol or alcohol mixed fuel, but it is possible to use a rubber hose similar to that used for gasoline refueling machines. When rubber hoses are used with liquids with strong dissolving power, such as organic solvents such as alcohol, they tend to deteriorate and swell, resulting in a shortened service life.

To solve this problem, it is possible to use a metal hose that is less susceptible to the effects of organic compounds; however, as wire braided metal hoses are used, the wires break and hangnails form on the outer surface of the hose. This is dangerous because it may get stuck in the hand, and the flexibility is insufficient, making it difficult to handle.

The object of the present invention was made in consideration of the above circumstances, and it is an object of the present invention to provide a hose that is easy to use and is less susceptible to deterioration even when a liquid with a high dissolving power such as alcohol is used.

[Means for solving problems]

In order to achieve the above object, the present invention provides a reinforcing layer on the outside of a flexible metal tube, and covers the reinforcing layer with a cover made of rubber or resin.

[Effect]

According to the present invention, the liquid flowing inside the hose comes into contact with the metal inner tube and does not come into contact with the rubber or resin tube that is the cover, so even if alcohol or the like is used as the liquid, there is no risk of the cover being corroded by the liquid. In addition, since there is a reinforcing layer between the rubber or resin cover and the flexible metal inner tube,
Even if the metal inner tube is shaped like a bellows, there is no fear that the cover material will get into the troughs of the bellows during molding such as co-extrusion.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a longitudinal sectional side view showing an embodiment of the hose of the present invention, and Fig. 2 is a longitudinal sectional side view of the main parts of the same. It has a three-layer structure including a cover 2 made of rubber or resin.

Among these, the reinforcing layer 3 is made of one to several layers of cloth or synthetic fibers, and the flexible metal inner tube 4 is made of stainless steel, steel, or phosphor bronze and is formed into a bellows or bellows shape. .

In this way, to make the hose 1, the flexible metal inner tube 4 serving as the core material and the rubber or resin cover 2 are integrally co-extruded. Since the reinforcing layer 3 made of cloth or the like is interposed therebetween, even if the flexible metal inner tube 4 has a bellows structure, there is no fear that the cover material will get into the troughs 4a of the bellows due to the reinforcing layer 3 made of cloth.

As shown in FIG. 3, such a hose 1 is used, for example, as a hose for an alcohol or alcohol mixed fuel supply device 5 installed on the premises of a gas station. In this case, even if a metal tube is used as the inner tube, since it is made flexible, there is no risk that the flexibility of the hose 1 as a whole will be impaired. Since such liquids do not come into direct contact with the rubber or resin cover 2, the dissolving power of alcohol allows the cover 2 to
will not be violated.

Further, as mentioned above, since the cover material does not enter the flexible metal inner tube 4 due to the fabric reinforcing layer 3, there is no risk of the flexibility of the hose 1 being impaired, and the elongation of the hose 1 itself is suppressed. Minimum bending radius is ensured.

Since the outer layer of the hose 1 is made of rubber or resin, when the flexible metal inner tube 4 of the inner layer is damaged, the liquid inside is immediately and rapidly released compared to when the outer layer is made of a braid made of metal wire. Since there is no risk of overflowing and it will seep out gradually, the hose 1 can be replaced or repaired during that time and the amount of leaking liquid can be kept to a minimum, avoiding the risk of contact with liquid that is harmful to the human body or a fire hazard. It has no elasticity, and the elastic cover comes into direct contact with the child during work, making it easy to handle.

〔Effect of the invention〕

As described above, since the hose of the present invention is provided with a flexible metal inner tube, even when used for supplying liquids with high dissolving power such as alcohol, the hose will not be corroded by the liquid flowing inside. There is no risk of damage and the service life is increased.
Even when using non-electrically conductive liquids such as petroleum and chemical solvents, grounding is not required, and airtightness and heat resistance are further improved.

In addition, the fabric reinforcement layer maintains the flexibility of the hose, making it easy to handle, and ensuring a minimum bending radius of the hose, which prevents plastic deformation, hardening, and fatigue failure of the flexible metal inner tube. It can be prevented.

Furthermore, safety is ensured even if the inner tube is damaged.

[Brief explanation of drawings]

Fig. 1 is a vertical side view showing an embodiment of the hose of the present invention, Fig. 2 is a longitudinal side view of the main parts of the same, and Fig. 3 is a view of the hose of the present invention when used in an alcohol or alcohol mixed fuel supply device. It is a front view. l...Hose 2...Cover 3...Reinforcement layer 4...Flexible metal inner tube 4a...Trough 5...Alcohol or alcohol mixed fuel supply device Fig. 1 Fig. 2

Claims (1)

[Claims] A hose characterized in that a reinforcing layer is provided on the outside of a flexible metal tube, and a cover made of rubber or resin is applied to the reinforcing layer.