JPH04501906A - Laminated pipes and conduits and their manufacturing methods - 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] name of invention Laminated pipes and conduits and their manufacturing methods Background of the invention The present invention generally relates to double wall, vented heat exchangers, high strength tubes, including energy storage. , laminated pipes with a wide range of applications, using concentric pipes, including corrosion-resistant pipes and lightweight pipes. Regarding the field.

Summary of the invention In short, the present invention not only effectively prevents leakage during flow/gas exchange, but also Several concentric tube structures with corrosion resistance and added strength for effective exchange The goal is to provide the following. For this reason, this laminated pipe has different surfaces that are intermittently in contact with each other. It is formed as a set of concentric parts made of a material that Its constituent units are seamless A notch was made in the long horizontal direction to locate the part and the inner enclosure. or , is formed with a formed exterior, and its narrow gap in the longitudinal direction may be later welded. is brazed. When welding or brazing, the material shrinks as it cools, so do not The portions contract radially over the interior to form a stressed skin. At least one embodiment Inner longitudinal grooves are provided on the exterior of the chamber to collect leakage from the interior walls and provide a tight seal. Discharge to a collection point either inside the building or outside. Welding or brazing in parts In order to prevent fusion between the inside and outside, an extension pad is inserted between the inside and outside to cover the gap. entered.

Detailed description of examples According to a first embodiment according to the invention, the device is designated with the reference numeral 1o and generally includes an inner tube. The part 11, the outer tube part 12, the heat shielding filler 26 and the brazing part 14 are made up of a material part 14.

The inner tube section 11 is seamless and has a flat inner surface 16 and a flat outer surface 17. . Generally, it is made of thin metal, glass, ceramic, etc.

The outer tube part 12 is preferably formed of a weldable metal, and has an inner surface 2o and an outer surface. A pair of longitudinally parallel side edges 22 that contact the surface 21 and the gap 24 filled with the welding material 25. It has 23. Optionally, outer surface 21 includes heat transfer fins 25A (not shown). It is also possible. Optionally, a thin metal extension shim 26 is also provided at the bottom of the gap 24. This may be formed into a thin strip of the desired metal material.

This embodiment has inner and outer tube parts 11, 12 of appropriate dimensions, and an elongated gap in the outer tube part. This gap facilitates the insertion of the inner tube section into the If six gaps are provided, the outer tube will have some degree of radial elasticity, so the pressure will be reduced. Force fits are no longer necessary and relatively long tubes can be assembled. Next, the outer tube is Welded by method. Of course, gas welding can be precisely controlled, but the tube is virtually perfectly round. Electric welding is preferred when the weld cools, normal shrinkage occurs and this Therefore, the outer tube contracts on the inner tube, stress is applied to the inner tube, and the outer surface of the inner tube and the outer The inner surfaces of the tubes are in close contact, providing very good heat transfer between them.

Since the inner tube 11 is placed under pressure and the outer tube 12 is placed under a photoperiod condition, its strength increases. It turns out. This compressive stress relationship is the same as that used when manufacturing double shafts. It is the same.

In a second embodiment of the invention, generally designated by the reference numeral 30, the first embodiment As in the case of , the inner tube part is replaced with a ceramic or glass core 31, and the outer tube part can also be replaced with a metallic one. Excessive stress that can damage ceramic or glass cores Welding operations are carried out in a similar manner, taking care not to cause damage. To make this easier It is preferable that the external thickness is reduced for this reason.

A third embodiment of the invention, generally designated by the reference numeral 40, provides protection against contamination and leakage. It is a more complex structure that requires ventilation holes to detect the Looking at Figure 3, we see that The arrangement 40 includes first, second, and third concentric interiors 41, 42, and 42, respectively. .

For the first part, as in the first embodiment, a thin stainless steel seamless conduit is desired. Preferably, it has an inner surface 46 and an outer surface 47. The second part 42 is made of aluminum and copper. , preferably made of a non-ferrous metal such as brass, the second part has an inner surface 50 and an outer surface 51; A longitudinally extending ventilation groove 52 is selectively provided on one or both sides.

The third section 43 is again preferably a thin-walled stainless steel conduit, with an inner surface 60, including the outer surface 61, the longitudinal spacing 11!62 and the heat shielding padding 63, which Assembled in the same way as the first and second parts, when each part is assembled, the first and second parts is slid inside the third part, and a similar welding operation is performed. Contains multiple ventilation grooves Device 40 is an example of a double-wall vented laminate tube or conduit. Number of layers of tube is not limited to the three layers shown in the drawings, but may have as many layers as necessary.

shadow Deaf Brief description of the drawing In the drawings, reference is made to the description and the same reference numbers are used throughout each figure. It is adopted to indicate something.

FIG. 1 is a schematic cross-sectional view of a first embodiment according to the invention.

FIG. 2 is a schematic cross-sectional view of a second embodiment according to the invention.

FIG. 3 is a schematic cross-sectional view of a third embodiment according to the invention.

Figure 4 is an isometric view of the laminated tube forming part of each of the first, second and third embodiments. It is.

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Claims (9)

[Claims] 1. A first interior of a seamless pipe having inner and outer concentric surfaces, and an outer surface coaxially contacting the interior. the exterior having a longitudinal groove with a pair of opposing parallel side edges, filled with fusible material; a laminate comprising: said grooves which contract radially on said outer part over said inner part when filled and cooled; tube. 2. Claim 1 further characterized in that the interior is made of a metal material. laminated tube. 3. The further feature is that the interior is of a non-metallic material and the exterior is of a metallic material. A laminated pipe according to claim 1. 4. The feature has the further feature that the exterior has radially arranged fins on its exterior surface. A laminated pipe according to claim 1. 5. the inner and outer parts are made of metal material, and the groove has a heat barrier of metal material at its inner end; This prevents fusion between the inner and outer surfaces when the fusible substance is in a molten state. Laminated tube according to claim 1 with further features. 6. The exterior has a longitudinally extending groove on its interior surface, thereby allowing the interior and Further features include longitudinally collecting permeate permeating the exterior passageway outwardly of the exterior. A laminated pipe according to claim 1. 7. A first interior of a seamless pipe having concentric inner and outer surfaces, coaxially touching the interior a concentric first exterior having a longitudinal gap having a pair of opposing parallel side edges; the exterior is filled with a fusible material that contracts radially over the interior when cooled; a concentric second exterior surrounding the concentric first exterior; when cooled, the second exterior surrounds the first exterior; a second single longitudinal gap filled with a fusible material that is shrink-fitted onto the exterior; A laminated pipe for piping construction, consisting of a concentric second exterior. 8. The interior and the second exterior are made of a material containing iron, and the first exterior is made of a non-ferrous material. A laminated tube according to claim 7, having the further features of: 9. a) having a seamless inner tube section of the desired inner diameter, and b) matching the outer diameter of the inner tube section. c) a straight gap having a pair of opposing parallel side edges; a longitudinal gap is provided in the outer tube portion so as to form a d) inserting the inner tube into the outer tube; e) Filling the gap with hot melt material and solidifying the melt material, thereby causing the outer tube part to be baked. The inner surface of the outer tube portion is brought into close contact with the outer surface of the inner tube portion by fitting. A method for manufacturing laminated pipes for piping construction, which consists of the above steps. 10) A patent that adds the step of providing a second outer tube portion that surrounds the first inner tube portion in a similar manner. The laminated pipe according to claim 8. 11) The outer tube also has a longitudinal section on its inner surface to collect waste discharged from the inner tube. 9. The laminated pipe according to claim 8, further comprising the step of providing grooves extending in the direction.