JPS5820857Y2 - solar hose - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hose that is piped outdoors, such as in a solar water heater, and is used as a flow path for water or other heat medium fluid.

This type of hose is exposed to ultraviolet rays and direct sunlight, so of course it must be weather resistant, but since it is used by piping it onto vertical walls and slopes, it is also required to have pressure resistance of about 10 kg/crn2. .

If a heat insulating layer is applied to the outer circumference of a copper or iron pipe, the insulation, weather resistance, and pressure resistance for the inside and outside of the pipe will be satisfied, but the heat conductivity from one end of the pipe to the other is too good, resulting in heat loss. is large.

This invention has low thermal conductivity through the tube, is weather resistant,
The purpose is to provide a solar hose that is pressure resistant and inexpensive.

In order to achieve this purpose, the present invention consists of an inner tube 1 and an outer tube 2 made of weather-resistant rubber, and a sponge layer 3 formed between the inner tube 1 and the outer tube 2, as shown in the figure. The sponge layer 3 is integrally bonded to the inner tube 1 and the outer tube 2 by simultaneous extrusion molding.

EPDM (ethylene propylene rubber) is used as the inner tube 1.
, FPM (fluororubber), EPDM as the outer tube 2, C
5M (chlorosulfonated polyethylene), sponge layer 3
As such, EPDM and CR (chloroprene rubber) are used.

In the hose of the present invention, the inner tube, outer tube, and sponge layer are made of materials with good weather resistance, so the hose has sufficient weather resistance.

However, since the inner tube is made of rubber, the pressure resistance of the inner tube alone is inferior to that of a tube using a metal tube for the inner tube.

However, in this proposal, the inner pipe, outer pipe, and sponge layer are integrated, so even when piping is installed vertically, these layers do not shift from each other and become partially thin due to tension due to the load, and uniformity can be maintained. Therefore, the sponge layer and outer tube act as a reinforcing layer against the working pressure, and it is possible to use a material that has sufficient pressure resistance even without a reinforcing layer such as reinforcing thread.

In addition, since the inner tube, outer tube, and sponge layer are bonded together by simultaneous molding, there is no possibility that the above functions will be lost due to deterioration of the adhesive over time, unlike when adhesive is used. Nor.

Furthermore, even if a crack occurs in the outer pipe, rainwater will not penetrate into other parts and reduce the insulation inside and outside, and the rainwater that has invaded will freeze in the winter and provide insulation between the inside and outside. It also prevents the outer tube, which is applied to protect and waterproof the layer, from being destroyed.

Note that the sponge layer is preferably made of closed cells from the viewpoint of moisture proofing and heat insulating properties.

In addition, the practical standard dimensions of the proposed hose are an inner diameter of 14.5 mm,
The inner tube has a thickness of 2.5 to 3 mm, the sponge layer has a thickness of 10 mm, and the outer tube has a thickness of just under 1 mm.

[Brief explanation of the drawing]

The figure is a sectional view of the proposed hose. 1...Inner pipe, 2...Outer pipe, 3...
...Sponge layer.

Claims (1)

[Scope of utility model registration request] It consists of an inner tube and an outer tube made of weather-resistant rubber, and a sponge layer formed between the inner tube and the outer tube, and the sponge layer is integrally bonded to the inner tube and outer tube by simultaneous extrusion molding. Solar hose.