JP3099652U - Laminated hose - Google Patents

Abstract

The object of the present invention is to simplify the working process such as cutting and solid mounting, to maintain the fixed shape of the cut surface well, to maintain the durability for use of tap water for a long time, and at the same time to have flexibility and insulation. To provide a good laminated hose at low cost.
A thermoplastic soft synthetic resin is formed on an inner tube layer comprising an innermost layer 1 made of a heat-resistant and chlorine-resistant crosslinked polyethylene resin and an inner coating layer 2 made of a soft, flexible and thermoplastic resin. A reinforcing net 3 made of resin fiber is wound, and a helical wire 4 made of a hard synthetic resin is wound therearound, and these are covered and covered with an outer tube layer 5 made of a styrene or olefin elastomer resin.
[Selection diagram] Fig. 1

Description

The present invention relates to a laminated hose. Regarding the constituent material of the hose, there are few examples of a single-layer structure. There are many. The present invention relates to such a laminated hose.

技術 The first technology that is the background of the present invention is a technology related to Japanese Utility Model Publication No. 51-48739. This technique is a reinforced heat insulating pipe in which a foamed resin layer is formed on the outer periphery of an interposition reinforcing material, and the outer portion thereof is covered with a flexible resin outer pipe.

The second technology that is the background of the present invention is a technology according to Japanese Utility Model Publication No. 8-8379. In this technique, an inner surface layer made of a graft polymer elastomer having a fluoropolymer as a trunk polymer and a crystalline fluororesin as a branch polymer, and a polyurethane elastomer layer on the outer surface thereof are heat-fused. Discloses the interposition of a spiral reinforcing core or a fiber reinforcing layer.
Japanese Utility Model Publication No. 51-48739 Japanese Utility Model Publication No. 8-8379

However, the first of the background arts described above is to realize an improvement in durability, less connection work, and a reduction in connection portions as compared with the conventional metal pipe. However, ordinary tap water contains a large amount of chlorine, and it is inevitable to solve the problems of heat resistance and chlorine resistance of the inner pipe layer that serves as the flow path for hot water and hot water. The technology described does not solve this problem, and hoses made of synthetic rubber have excellent heat resistance, but have poor chlorine resistance. There was a problem that it was easy.

As a solution to the problem of chemical resistance including chlorine resistance, the second of the above-mentioned background arts can be mentioned. However, this background technology does not take heat resistance into consideration, but solves the problem of chemical resistance. In the first sense. Therefore, a considerably expensive material such as a fluorocopolymer is used for the inner surface layer, that is, the inner tube layer, and attention is paid to the adaptation of the fusion with the outer tube layer constituting the two-layer structure. For this reason, there has been a problem that a hose that can serve as a flow path of hot water or hot water containing tap water containing chlorine cannot be provided at low cost.

As a technique for solving the problems of heat resistance and chlorine resistance at low cost, a single-layer hose using cross-linked polyethylene is also conceived, but such a single-layer hose becomes thinner when the wall thickness exceeds a certain thickness. In addition to being rigid in nature, in addition to lacking flexibility, special fixtures are also required, there is a problem that, and single-layer hoses using other soft synthetic resin, while rich in flexibility, When an external pressure is applied, there is a problem that it is difficult to maintain a circular cross section.

As a solution for maintaining flexibility, there is also a technique in which the thickness of the inner pipe layer is reduced and a steel wire is spirally wound around the inner pipe layer, but in this technique, a considerable amount of external force is applied. Although it has durability, the elastic limit range is narrow, and once it deforms beyond the elastic limit, it can not be restored to its original form, and it also has time durability and tools, such as pliers when cutting, especially when cutting. However, there is a problem in that the simplicity of the device is difficult and the device has electrical conductivity, so that it is necessary to additionally provide for unexpected leakage.

The present invention provides a laminated hose in which an inner tube layer and an outer tube layer are joined, and a net-shaped or spiral interposed reinforcing material is interposed between the inner tube layer and the outer tube layer. Has an innermost layer made of a heat-resistant, chlorine-resistant crosslinked polyethylene resin, and an inner coating layer made of a soft, flexible and thermoplastic resin covering the innermost layer, and the inner coating layer is made of polyester. A fiber-reinforced net is wound around a helical wire made of a hard synthetic resin around the reinforced net. Is the most important feature as a means for solving the problem.

Under the means for solving the problems described in the preceding paragraph, the present invention provides a structure in which the constituent material of the spiral wire is a high-density polyethylene, polypropylene, or polycarbonate, or the innermost layer has a thickness of 0.1 to 0.6 mm. It has a thickness, and the thickness of the entire inner tube layer is 1 to 3 mm, and the thickness of the outer tube layer elastomer resin is 1 to 3 mm.

With the above configuration, since the innermost layer is made of a heat-resistant, chlorine-resistant crosslinked polyethylene resin, it has good durability against hot water and hot water of tap water, and has a soft outer periphery of the innermost layer. Due to the two-layer structure covered with the flexible and thermoplastic resin inner coating layer, stress dispersion occurs even when the water flow rate changes or the internal pressure changes, and damage is less likely to occur.

増 大 The increase in internal pressure due to the increase in water flow rate is also suppressed by the reinforcing net, in addition to the stress dispersion described in the preceding section. Since the reinforcing net is made of polyester fiber, it is rich in thermoplasticity. Therefore, even if hot water flows in the hose, a semi-heat-welded state and stress distribution due to the mesh are generated, and the net has extremely strong durability against internal pressure.

On the other hand, since the spirally wound spiral wire is made of a hard synthetic resin, it has sufficient hardness and moderate elasticity to maintain a good cross-sectional circular shape of the hose, and the elastomer constituting the outermost tube layer It has the function of dispersing the external pressure applied to the resin in terms of stress, can avoid deformation that is difficult to restore, has good insulation properties, and is easy to cut unlike steel.

The effect described in the preceding paragraph is that the innermost layer has a thickness of 0.1 to 0.6 mm, the thickness of the entire inner tube layer is 1 to 3 mm, and the thickness of the outer tube layer elastomer resin is 1 to 3 mm. The configuration produces the best effect. Needless to say, if the diameter of the spiral wire becomes large, the flexibility becomes poor, and if the diameter becomes thin, it becomes difficult to maintain the shape. As a result, even if the diameter of the helical wire is somewhat small, the stress distribution of the external pressure is good, and therefore, the circular cross-sectional shape is well maintained.

ホ ー ス The hose according to the present invention does not cause a problem of rust since the constituent materials are all synthetic resin. In addition, the inner tube layer has a thickness suitable for drilling screw holes for fixing, and the elastomer resin of the outer tube layer is a moderately soft material and has elasticity. Not only that, but also the compatibility and the degree of adhesion between the hose and the fitting are good.

Also, because of its good flexibility, no seams are required, and it can be used not only for hot water and hot water to the bathtub, but also for the means for maintaining the heat of floor heating.

According to the laminated hose according to the present invention, the working process such as cutting and solid mounting is simple, the fixed shape of the cut surface is maintained well, and the inner tube layer serving as a flow path of hot water and hot water is heat resistant. Because of its water resistance and chlorine resistance, a laminated hose that maintains durability even when using tap water for a long period of time and has good flexibility and insulation properties at the same time is provided at low cost. Therefore, the present invention is different from the two background arts in technical idea.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing the configuration of the ninth embodiment of the laminated hose of the present invention. As shown in FIG. 1, the laminated hose 9 according to the present invention includes an innermost layer 1 made of a crosslinked polyethylene resin and an inner coating layer 2 made of a soft synthetic resin for covering the outer periphery of the innermost layer 1 in order from the inside. Net, which is a net-like interposition reinforcing member wound around the inner pipe layer and the sub-inner pipe layer, and a hard synthetic resin, which is wound on the reinforcing net 3 and is a spiral interposition reinforcing material Made of a styrene-based or olefin-based elastomer resin 5 covering the spiral wire 4, the reinforcing net 3, and the spiral wire 4.

The constituent material of the inner coating layer 2 is a styrene-based elastomer as a typical example, but may be an olefin-based elastomer. The constituent material of the reinforcing net 3 is a polyester fiber. However, as an example of the constituent material of the reinforcing net 3, other soft thermoplastic synthetic resin fibers such as vinylon fiber and nylon fiber are suitable for use. Further, the constituent material of the spiral wire is high-density polyethylene, but the material is not limited to this as long as it is a hard synthetic resin material having a certain elasticity.

In a typical and best embodiment of the present invention, the innermost layer has a thickness of 0.1 to 0.6 mm, the total thickness of the inner tube layer is 1 to 3 mm, and the thickness of the outer tube layer elastomer resin is It is in the range of 1-3 millimeters. Two hoses may be joined by an elastomer which is a constituent material of the outer tube layer according to the direction of the water flow.

With the above configuration, the innermost layer 1 is made of a heat-resistant and chlorine-resistant cross-linked polyethylene resin, and therefore has good durability against hot and hot tap water. In addition, since the outer periphery of the innermost layer 1 is covered with the inner coating layer 2 made of a soft, flexible and thermoplastic resin, the structure becomes a two-layer structure, and when the water flow rate suddenly increases or the internal pressure increases. Also, stress dispersion occurs and damage is unlikely to occur.

増 大 Increase in internal pressure due to increase in water flow rate is also suppressed by the reinforcing net 3. Since the reinforcing net 3 is made of polyester fiber, the reinforcing net 3 is rich in thermoplasticity. Therefore, even if hot water flows in the hose, a semi-heat-welded state and stress distribution due to the mesh are generated, and the durability against internal pressure is extremely strong.

On the other hand, with respect to the external pressure on the hose, the helically wound spiral wire 4 disperses the external pressure in stress, and can avoid deformation that is difficult to restore, and has good insulation properties and is easy to cut. And there is no room for rust like steel. No steel surface coating is required to solve the problem of rust, so the manufacturing process is simple and the manufacturing cost is very low.

The configuration in which the innermost layer has a thickness of 0.1 to 0.6 mm, the thickness of the entire inner tube layer is 1 to 3 mm, and the thickness of the outer tube layer elastomer resin is 1 to 3 mm is the best and typical. FIG. When the diameter of the spiral wire 4 is large, the flexibility is poor. On the other hand, when the diameter is small, it seems that the shape may be difficult to maintain or unexpected damage may occur in the cut. Since the whole is covered with the outer tube layer 5 made of an elastomer resin having flexibility, even if the diameter of the helical wire 4 is somewhat small, the stress distribution of the external pressure is good, and therefore, the circular cross section is formed. Is also good.

The inner tube layer is of the configuration of the best and typical embodiment described above, has a thickness suitable for drilling screw holes for fixing, and the elastomer resin of the outer tube layer is a moderately soft material and has elasticity. Therefore, not only is it easy to fix and mount the fittings, but also the suitability and adhesion between the hose and the fittings are improved.

FIG. 2 is a cross-sectional view of a main part showing a state in which a metal fitting for connection is attached to the laminated hose of this embodiment. As shown in FIG. 2, a metal fitting for coupling is often attached to the end of the hose. For example, the metal fitting for coupling 6 is attached to the laminated hose 9 by using a commercially available fastening fixture 7 called TRIDON (registered trademark). In the case of solid mounting, the fixing projections 6a engraved on the coupling fittings can be stuck in the laminated hose constituting material moderately, and can stably and closely adhere to the solid mounting state without water leakage for a long time. .

The multi-layer hose of the present invention is a closed flow path of hot water and hot water which is originally made of tap water containing a large amount of chlorine, and is easy to work, rich in insulation, flexible, and has high durability. It is a good thing. In addition, since it is extremely inexpensive, it is not only used as a flow path between the bathtub and the hot water or hot water storage tank or the hot water tank as described above, but also buried in the wall material or floor material, and provided with heating equipment or It is also inexpensive and useful as a component of space heat insulation equipment.

It is a tomogram showing composition of an embodiment of a laminated hose of the present invention. It is principal part sectional drawing which shows the state which attached the metal fitting for coupling to this embodiment laminated hose.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Innermost layer 2 Inner coating layer 3 Reinforcement net 4 Spiral wire 5 Outer tube layer 6 Connection metal fitting 6a Solid mounting projection 7 Tightening fixture 9 Multilayer hose

Claims (3)

In a laminated hose in which an inner pipe layer and an outer pipe layer are joined and a net-shaped or spiral interposed reinforcing material is interposed between the inner pipe layer and the outer pipe layer, the inner pipe layer has heat resistance. An innermost layer made of a chlorine-resistant cross-linked polyethylene resin, and an inner coating layer made of a soft, flexible and thermoplastic resin such as a styrene-based elastomer or an olefin-based elastomer covering the innermost layer. A reinforcing net made of a soft thermoplastic fiber such as a polyester fiber is wound on the coating layer, and a spiral wire made of a hard synthetic resin is wound around the reinforcing net, and an interposition reinforcing material composed of the reinforcing net and the spiral wire is used. Is coated with a styrene or olefin elastomer resin. (2) The laminated hose according to (1), wherein a constituent material of the spiral wire is any one of high-density polyethylene, polypropylene, and polycarbonate. The innermost layer has a thickness of 0.1 to 0.6 mm, the thickness of the entire inner tube layer is 1 to 3 mm, and the thickness of the outer tube layer elastomer resin is 1 to 3 mm. Item 4. The laminated hose according to Item 1.

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