DE1814042A1 - Heinz and air conditioning management - Google Patents

Description

Heating and air conditioning line The invention z4elew relates to a. 110 indoor and air conditioning lines, in particular a flexible, heat-resistant line, the inner and outer walls with a bing space between them, which is filled with materials insulating properties is filled.

There has long been a need for a lightweight, durable, bendable and refractory or heat-resistant line or corresponding pipe For the transport of hot or cold air that is needed for space heating or cooling will. Foamed plastics or plastic foam were increasingly used as IJO-liermaterila for lines or the like. Such foams, in particular Urethanes, are lightweight, inexpensive, and durable, and quickly made into whatever you want Shape configuration. A method of using expanding or inflated Plastics or display materials in the manufacture of cables is in the US patent 3 118,800 (patented to Charles D. Snelling on January 21, 1964).

The lines proposed so far consisted essentially of Plastic and therefore made of non-metallic structures. Although foamed plastics or plastic foams because of their extreme lightness or their extremely low weight Weight ala insulation material are desirable, they have the disadvantage of being right being flanimable and generating large amounts of smoke. Before this problem is that entire industry, and many attempts have been made to to manufacture flexible ducting at low cost that meets the requirements of the Inventor and is consistent with approved Norman. Try under Uses of aluminum foil as a refractory wall were unsuccessful because of aluminum has a relatively low melting point.

Taking the above into account, the invention According to a heating and air conditioning line created which is characterized by a continuous or uninterrupted inner wall and a continuous or uninterrupted outer wall which concentrically surrounds said inner wall and forms an annular space in between, in which there is an insulating material over its evolved cross-section ; beSis walls are made of flexible material, and at least one of said walls is formed from aluminum foil which has a melting point of at least about 1 1000 C (2 0000 F) in order to give said duct on the polishing side refractory or heat-resistant properties to lend.

hus the aforementioned it can be seen that an IIsiz- and air conditioning line is created, which represents a structure with a light weight, in the case of plastic foam Can be used as insulating material and still work for the intended purpose in turn is fireproof. BB, other insulating materials can also be used and still ensure the necessary fire resistance, if provided as specified is that at least one of the surfaces of the line made of lightweight, flexible IXterial Manufactured with a high melting point and poor inflammability or flame resistance eats.

Objects and advantages of the invention will be more clearly understood from the following description in conjunction with the accompanying drawings, in which Figures 1 to 3 are used to illustrate methods that are used in the creation of the. invention gas-created air ducts can be applied; Piguren 4 and 5 show, in cross-section, embodiments of air ducts which represent various means for sealing the inner and outer walls.

Ribs or waves in thin strips or

-bands when forming the strip or

Shows ribbons in a tubular shape; Figure 6A shows a shape of a ribbed or corrugated strips with undeformed edge or

Shows nantel ends; FIGS. 7 to 10 serve to illustrate different embodiments of air ducts which, according to the invention and Figure 11 illustrates a furnace used to perform a flame test on a test piece.

The invention generally has a flexible heating and air conditioning line which has a continuous inner wall and a continuous outer wall which concentrically surrounds the inner wall and forms an annular space between said walls. In the interior there is an insulating material over its entire cross section. Both walls are made of flexible material, and at least one wall is made of steel foil or another foil with a melting temperature of at least 1093 ° C (2 00 ° C @) in order to give the foil side of the pipe fire-resistant or hit-resistant properties .

It is advantageous to make both walls of steel foil; the Polie has a thickness which enables the conduit to bend and at to follow the shift in direction changes. The foliendioke ka: in sioh in the area from about 0.0127 to about 127 mm (0.0005 to 0.005 inches), and generally from about 0.0254 to about 0.0762 @m (0.001 to 0.003 801L). For quick production steel foil should be extra soft or low carbon or tempered. There If the steel foil corresponds to a corrosion resistance standard, it can be coated with tin or be covered with a thin layer of plastic.

The inner and outer walls were made of steel foil by molding the strip-shaped or sheet-shaped film hergesteilt into a tubular shape; the pipe can go through Balæen, overlap, seam or point '.

weld or the posts of the formed strip or the formed web can be folded over to form a to form bent or folded closure connection. If fire resistance is no Problem is, the strip or the Behn can be removed by using solder sealed in the style used in the blochdon industry, or the seal can be an adhesive such as epoxy heart.

After the inner pipe wall has been made, foamed plastic, for example urethane foam, over this and in the areas formed by the outer wall Injected or

be shaped. Inside the foamed plastic can be a helical or spiral-shaped steel wire are formed, the one resilient Reinforcement represents to maintain the shape, size and continuity of the pipe and to create the necessary flexibility.

If desired, the steel foil can have flat ribs or grooves of the Type that the ribs or grooves, when formed into a tube, run in the circumferential direction around the pipe and for additional flexibility of the air duct ensure that it can be guided into corners when laying or installing.

Although it is advantageous to use geechaunteu plastic as an insulating material to be used, since these are in a large density range, for example from 16 to 641 kg / m3 (1 to 40 lbs / ft3) or more, preferably from 16 to 96 kg / m3 (1 up to 6 lba / ft3), other materials including Glasfa-Bern, rock wool or the like. Use.

Although fiberglass itself isn't flammable, verauche weren't very successful in providing them with an external flame-arresting coating.

Various processes can be used to produce the line according to the invention can be applied.

One method is that described in U.S. Patent 3,118,800. When creating an air duct, the insulating material is foamed plastic veraudet, reference is made to Fig. 1, which one by means not shown Has supported mandrel 10, around which a tubular element or an inner wall 11 is formed from steel foil 12.

The steel foil 12 is pulled off a rasp or roll 13 and pulled through a funnel-shaped mold 14, which is slightly below and partially is arranged around the mandrel 10, on which the film is gradually circular is shaped to the mandrel 10, as shown, to surround. if the film coming out of the factory overlaps at 15. becomes a schematic Welding device shown and generally denoted by reference number 16 arranged. The welding device 16 has a rotatable copper wheel or electrode 17, which is connected to a power source, not shown; the shaped Steel pipe or

the inner wall 11 is grounded or placed on the ground to the circuit to close. The copper electrode 17 is pulsed at short time intervals, i.e. forgetting with current impulses.

one behind the other em spaced welding points along the pipe element or to form the inner wall 11. If the welded pipe or the inner wall 11 moved forward and the mandrel 10 leaves 0 another steel foil tube b.

an outer wall 21 essentially concentrically shaped around it. A reel or roll 19 is there to pull the steel foil 18 therefrom and then through the molding tool 20 into a tube or an outer wall 21, as shown to shape. When the polio is formed, a mouthpiece 22 becomes a foamed one Plastic mixture is ejected onto the film web when it is at the end of the tool is shaped. When the strip overlaps, it becomes one via an @ shoe 23 earthed resp.

grounded electrode 24 and under a positive electrode 25 led through, which by a peder 26 against the strip and the back pressure causing shoe 23 is biased. When the tubular Outer wall 21, as shown, moved forward, current pulses are across the electrodes 25 and 24 to effectively lap weld the outer tube. In the meantime scbäuit the plastic, expands and fills the annulus between the inner wall 11 and the outer wall 21. When the plastic expands, the inner wall becomes 11 and outer wall 21 causes them to align themselves more consistently to one another. The foamed plastic can contain a catalyst to promote curing accelerate, or the hardening can be effected by d6Z the joined Line is guided through an oven before it reaches the Aßtriebarollen 27,28. The term "foamed plastic or" plastic foam "as used herein is to be understood to include any type of expanding plastic includes, for example, expandable styrene spheres or cellular polyvinyl chloride, that can be expanded with the help of a blowing agent.

Instead of seam welding the pipe, the pipe can also be welded mechanically Seam closures be sealed or closed. Examples for seam closures or seams are shown in FIGS. 4 and 5, the cross-sections who are created according to the invention.

In Fig. 4, both walls, inner wall 29 and outer wall 30, are lap welded 31 or 32 seam-connected. Assume that the outer wall 50 of the steel foil is the only one is what is required for fire resistance i ao can the inner wall 29 from others Materials such as aluminum foil, impregnated refractory paper, plastic reinforcement and the like.

FIG. 5 differs from FIG. 4 in that the seam is turned over or folding the metal over itself, as shown, using seams 33, 34 is connected. Institutions to achieve this are already known and can can be used instead of welding devices 16 and 25 according to FIG.

As stated above, other types of insulation materials be used. When fiberglass is used as an insulating material, it will be all around placed the outer surface of the inner wall in the manner of a bandage or cotton wool.

This is shown schematically in Fig. 2, which is part of the dome 35 shows around the inner wall 36 made of plastic film in a previous one, not shown Station was lying around in a spiral. The inner wall 36 is helically welded, although they can also be bent or folded over in a helical manner by known means can. In the embodiment shown in FIG. 2, the inner wall 36 slides over the Mandrel 35 and rotates in the same direction, bio it reaches the next station, on which the glass wool or glass fiber bandage 37 and the polie 38 at the same time the tube or inner wall 36 are wound; the hood wall of pole 38a becomes helically welded over electrodes 39 and 40; electrode 40 is grounded placed or grounded and has a shoe portion 41, which extends under the outer strip extends; the electrode 39 presses down on the outside. The joined Elements gradually rotate as they advance on the mandrel 35. The outer wall 38u is intended to form a seam weld 42. The way the bandage is and steel foil 38 are peeled off, is shown more clearly in Fig. 3, the one Section taken along lines 3-3 of FIG. In Fig. 3, the Holle 43 are the Bandage 37 and the roller 44 of the Steel foil 38 peeled off at the same time, so that the steel foil 38 is next to the surface of the bandage 37, w nn them, as in Pig. 2 is wrapped around the inner wall 36.

It has also been found advantageous to use the foil with flat, transversal Ribs or

Grooves before it is formed into a tube. Such ribs can be in the range of 3.2 - 6.35 (one-eigth - one-quarter inch) or possibly also 28.5 - 31.8 mm from vertex to vertex. In Fig. 6 are rib rollers 45, 46 shown, which is in the strip 47, which is withdrawn from the spool 48, Grooves. The rib roller 45 is convex, while the rib roller 46 is concave is to make a concave strip so that it becomes easier to form a tube is malleable.

Fig. 6A shows a shape of a grooved or

ribbed strip 49 with flat ribs 50 running transversely across the strips 49 extend but inwardly from the side ends 51 and 52.

The flat side ends 51, 52 are used to connect with the aid of lap welding or mechanically formed seam connections. The strip is rolled into a concave shape so that it can easily be formed into a tube is malleable.

Referring to Figure 7, there is a section of an air duct in accordance with the invention sloped, the inner (53) and outer walls 54 of steel foil about 0.05 mm (0.002 inch) thick concentrically spaced from one another with foamed urethane 55 or glass fibers or

Has glass wool in the annulus of the same. The line is with a Overlap connection 56, as shown, seam-welded. Such lines can an inside diameter of 2.54 cm (1 inch to 91.4 cm (3 feet) and a wall thickness from 0.6 to 15.2 cm (1/4 to 6 inches).

A normal size would be one with an inside diameter of 15.2 cm (6 inches) and 1.27 ci (one-half inch) or possibly 3.8 cm thick foam be.

In Fig. 8 a corrugated or ribbed air line 57 is shown, which has an annular space filled with expanded plastic 58; The administration has at a distance the length of the annulus in the direction of the longitudinal axis rings from atti-fourth Charcoal 59 placed every few 30 centimeters (feet) around the draft to absorb or reduce any smoke through line 57 can form if the line 57 overheats.

According to ig. 9, which is similar to the Pig. 7 is, nn a number of smoke traps made of solid material 60 is used along the line smoke on to prevent passage through the insulation line in the event of smoke from overheating should form the line. One of the advantages of using foamed plastic is that the undamaged part as a filter for any smoke throughput serves through the same and thereby the Rauohdurohzug through the line or the pipe prevents.

The outer surface of the film of Fig. 9 is broken off. to show, that they are coated with a corrosion-resistant tbersug 61 made of, for example, tin. Plastic, Zinc or the like. Coated.

Fig. 10 is an embodiment of the line according to the invention in which in the pipe ring space made of, for example, plastic foam as a reinforcing member Coiled spring element 62 embedded iat which helically surrounds the inner wall.

Fig. 11 illustrates a flame arrester used for testing of sandwich parts that have elements used in the pipe will. According to the requirements for a substantially fireproof duct must the pipe will be able to prevent the passage of flames for a time of at least 30 I minutes if a class 1 duct is used, or in Cases of air lines class 2 to be prevented for at least 15 minutes P (ir the plasma test an oven supported by legs 63,64 is used. The body of the stove 65 has a base plate 66, side plates 67, 68 and a cover plate 69, the is provided with an opening 70 to a test piece side of the heating chamber of the furnace 65 suspend. A test piece which has steel violet socks 71 and 721 between having insulator 731 incorporated therein, such as urethane foam, is as shown brought over the opening 70. The test piece is in position by a frame 74 held, which is supported on the peripheral edges of the test sandwich. The test sandwioh is at least 18 inches (45.72 cm) square.

The top opening 70 of the oven 75 is approximately 34.3 cm (13 1/2 inches) in the square. Central in the Hitte des Sandwiches is a religious institution 75 arranged with a load 75a, with which a rod for removing and putting on connected to load 75a. A burner 77 with a pair of round pieces 78 and 79 is located at the bottom of the furnace 65. The furnace 65 is provided with refractory walls 80 (81) lined. The combustion chamber is 34.3 cm (13 1/2 inches) square and has a height of about 50.8 cm (20 inches). The static load 75a should be large be enough to take a load of 141 g / cm2 (2 1bs / inch2) on one Area of 2 s 10.16 cm (1: 4 inch) and the heat input should be 13700 # 126 koal / h (54500 # 500 BTU / h). In general the temperature is in the range of about 482 to 6490 C (900 to 1200 ° P).

After checking various materials, e.g. 3.

Aluminum foil, paper, vinyl, polyethylene, asbestos paper, asbestos cloth, chemically treated materials, fire retardant foam and the like., The applicant has An improved combinatron of elements was found that met the strict requirements of fire resistance or fire resistance. The final product is extremely light, very strong and also very stable. It can be very flexible up be made to the extent that it is double-folded, without being damaged or broken. The steel foil does not interfere with the normal ones and expected properties of the plastic foam.

Tests carried out with both hard and soft propane burner flames have shown that especially with steel foil about 0.025 mm (0.001 inch) thick, the flame does not penetrate the conduit. Conventional foam lines made prior to this invention were produced, hard propane flames usually penetrated immediately through the outer ceiling of the pipes and usually set them on fire.

The flan pears melted and ignited the foam inside, that burns with a thick, biting stomach. Within a very short time of for example 1 blinute will strike such flames through the inner wall and into the Core of the hitherto customary flexible line, ao daM made of melted foam the line drips out. Most of the usual lines set after taking them away the flames continue to burn until the pipe is practically destroyed. How understandable is, blowing air through such a duct would cause fire and the Carrying smoke to distant parts of a building.

According to this invention, the plams are unable to penetrate the outer film layer of the line, even after long periods of time. Tests have shown that the foam melts on the other side of the film, but that the insulation effect is still large enough to prevent the high temperatures from being transmitted from outside to the center of the line. The belly is confined within the annulus between the two foil surfaces and is absorbed in the undestroyed foam.It was found that even when the outer wall was heated to red hot, no fire arose within the ends of the pipe because there was no oxygen and the combustion carry on.

It is therefore understandable that the invention provides a pickling which are sure to be used in homes, apartments and commercial buildings can. If plastic foams are used as insulating material, their tendency can for burning even further by adding refractory, heat-resistant or ut, combustible chemicals in the foam are decreased. Such chemicals or fire retardants may have bromine, chlorine or fluorine that chemically interacts with the Molecular structure of the plastic foam are bound.

- patent claims

Claims (10)

patent Claims 1. Heating and / or air conditioning line, characterized in that a continuous inner wall (11; 29; 36; 53) is concentrically surrounded by a continuous outer wall (21; 30, '38a; 54) which forms an annular space between them, which is filled with insulating material over its cross-section, that both walls, the inner and outer walls, are made of flexible material and that at least one of the walls is formed by a metal foil which has a melting point of at least 10930 C (20,000 F) Give the line fireproof or heat-resistant properties on the foil side. 2. Line according to claim 1, characterized in that the metal foil has a thickness of 0.0127-0.127 mm (0.0005-0.005 inches). 3. Line according to claim 1 or 2, characterized in that; that the one of the walls is the outer wall (21; 30; 58a; 54) and consists of steel foil (12; 18). 4. Line according to claim 3, characterized in that the inner wall (11) a steel foil (12) in the range of about 0.0127-0.121 mm (0.0005 - 0.005 inches). 5. Line according to one of the preceding claims, characterized in that that the walls of the line have a series of beads or ribs (50) which run around the pipe. 6. Line according to one of the preceding claims, characterized in that that is used as insulating material foamed plastic or plastic foam, the has a density in the range of 16 - 96 i2 (1 - 6 1bs / ft3). 7. Line according to one of the preceding claims, characterized in that that a coiled Federalement (62) is embedded in the annulus of the keitung, the surrounds the inner wall in a helical manner. 8. Line according to claim 7, characterized in that the helical Peder element (62) is embedded in plastic foam. 9. Line according to one of the preceding claims, in particular according to claim 4, characterized in that the annular space smoke pumping means or Having rough barriers along the line at a distance from one another. 10. Line according to one of the preceding claims, in particular according to claim 4, characterized in that that the steel foil (12 ; 18) has a thickness in the range of about 0.025-0.075 mm (0.001-0.003 inches).