JPS6184490A - Composite pipe - 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 piping used in buildings, and more specifically to water supply/drainage and supply/exhaust piping installed inside buildings, which include two or more types of piping. Relating to a composite pipe suitable for passing fluids.

[Conventional technology]

It is undesirable for piping installed inside a building, such as water supply/drainage pipes and supply/exhaust pipes, to pass through the living space from the standpoint of livability and aesthetics, so they are generally installed behind the ceiling or between walls. and installed in the space of the underfloor ring. However, these spaces are narrow and have many obstacles, making piping work difficult.

Therefore, as a measure to alleviate the above-mentioned difficulties, measures have been taken to reduce the number of pipes.
Synthetic resin pipes or aluminum alloy pipes divided into chambers were used. These tubes are usually integrally formed by extrusion molding.

Among these, synthetic resin pipes have excellent corrosion resistance and workability, but have problems with fire resistance, while aluminum alloy pipes have excellent durability, but have the disadvantage of being susceptible to dew condensation and corrosion. In order to improve the fire resistance and prevent condensation, these pipes have recently been coated with inorganic materials.

[Problem that the invention seeks to solve]

Of the above configuration, especially 90° elbow type, 4
It is difficult to use extrusion molding to provide partitions on joint pipes such as a 5°Y type, and such joint pipes must be joined with a straight pipe (main pipe) that also has partitions in a water- and airtight manner. This was extremely difficult due to the complicated structure of the partition. For this reason, it is currently difficult to put the extrusion integrally molded partition pipe into practical use.

[Problem that the invention seeks to solve]

The present invention solves the above problems and has nine compartments partitioned in the cross-sectional direction, and is fireproof by combining an inner tube made of synthetic resin and an outer tube whose at least the outer layer is made of an inorganic material. The present invention provides a composite pipe that solves the problem of dew condensation and allows easy connection between pipes. The space between the inner and outer tubes is
These are composite tubes held together by a spacing support member inserted between the two tubes or a protruding support member integrally fixed to the outer surface of the inner tube.

[Effect]

After the inner tube is loosely fitted into the outer tube, a support member is inserted between the two tubes at several intervals, or a protruding support member integrally fixed to the outer circumference of the inner tube is used to hold the inner tube at a predetermined position inside the outer tube. It is easy to hold, put on and take off, and is practical.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, an inner tube 2 made of synthetic resin is loosely fitted inside an outer tube 1 whose at least the outer layer is made of a fire-resistant inorganic material. As the material for the outer layer spanning the outer tube 1 itself, there are various types of hydraulic cements such as Rutland cement, alumina cement, silica cement, magnesia cement, silica cement, and sulfuric acid cement, as well as various types of materials that can be solidified by sintering, such as china clay and vitreous materials. Use ceramics. The above 7 inorganic materials have some brittle "flaws" and "a'"" toughness.
), it is preferable to combine various fiber materials such as asbestos, rock wool, glass fiber, carbon fiber, ceramic, and fiber, and to improve fire resistance, heat insulation, dew resistance, and cutting workability. Various lightweight aggregates such as nonorite, vermiculite, mica, and natural lightweight aggregates can be mixed. A multilayer structure using hard PvCv't- as the inner layer may also be used. The outer tube 1 may be formed by extrusion molding, mainly made of the inorganic material, or by wrapping the inorganic material and the fiber material in layers around a core mold or a hard PVC tube for the inner layer.

The inner tube 2 is usually formed by extrusion molding a synthetic resin such as hard PVC or PE.

The inner tube 2 is loosely inserted into the outer tube 1, and the spacing support member 3 is fitted into the gap between both tubes. The spacing support member 3 is usually formed of the same material and the same manufacturing method as the inner tube 2, and in the embodiment shown in FIG. 1, it is made in a cross-sectional shape. It is convenient to form the outer surface of the upper side of the shaped cross section into a curved surface corresponding to the inner surface of the outer tube 1 and the outer surface of the lower side to correspond to the outer surface of the inner tube 2.

When the composite pipe is constructed as described above, one compartment 4 is formed inside the inner pipe 2, and a compartment 5 is formed between the outer pipe 1 and the inner pipe 2. For example, compartment 4 can be used as a water supply and drainage pipe, and compartment 5 can be used as a supply and exhaust pipe. Although the spacing support member 3 is simply inserted in this embodiment, it may be fixed to both tubes or one tube using a bonding means such as an adhesive.

In the embodiment shown in FIG. 2, a protruding support member 6f is integrally fixed to the outer peripheral surface of the inner tube 2 in advance.

By positioning the protruding support member 6 inwardly from both ends of the inner tube 2, the inner tubes can be easily connected to each other without being affected by the protrusion support member 6. In the case of a joint pipe, the protruding support member 6 needs to be located inward from both ends of the outer pipe for the same reason. The length of the protruding support member 6 must be shortened or shortened according to the above requirements, or it may be necessary to cut it off if it is integrally molded.

FIG. 3 shows a modification of the embodiment shown in FIG. 2, in which a protruding support member 6 in the shape of a curved fin is formed integrally with the inner tube 2.

By utilizing the elasticity of the protruding support member, it is possible to reliably fix it within the outer tube 1 without using all the adhesive.

〔Effect of the invention〕

The present invention is constructed as described above, and the outer tube made of a ready-made product, i.e., a commercially available fire-resistant inorganic material, is combined with the inner tube made of synthetic resin, so that water, steam, etc. Materials that require high watertightness can be passed through, the compartment formed in the gap between the inner tube and the outer tube can be used for air supply and exhaust, and the outer tube can provide fire resistance and dew resistance. Many effects can be obtained with a simple structure, such as being able to use the above-mentioned compartment as a fireproof and dewproof space layer without using it for gas circulation. Furthermore, it is possible to avoid the difficulty of watertight and airtight connections between pipes and between partitions when connecting partition pipes, and it is sufficient to use separate and ordinary connection means for each of the inner and outer pipes.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the first embodiment, FIG. 2 is a perspective view showing the second embodiment, and FIG. 3 is an end view showing a modification of the protruding support member shown in FIG. DESCRIPTION OF SYMBOLS 1... Outer tube, 2... Inner tube, 3... Spacing support member, 6... Protruding support member. C) ′? Hunger

Claims (1)

[Claims] 1. One or more inner tubes made of synthetic resin are disposed within an outer tube whose at least outer layer is made of a fire-resistant inorganic material, and the inner tube is inserted between the inner and outer tubes. A composite tube characterized in that the tubes are held together by spacing support members or protruding support members integrally fixed to the outer peripheral surface of the inner tube. 2. The composite pipe according to claim 1, wherein the spacing and protruding support member is a short cutting member shorter than the length of the inner pipe.