FI109829B - A method and apparatus for manufacturing an insulated modular tube, and a tube assembly thus prepared - Google Patents

Description

109829

A method and apparatus for making an insulated modular tube, and a tube assembly thus prepared, for the manufacture of insulated modular tubes, as well as for the dielectric rörarrangemang

The present invention relates to a method and apparatus for the manufacture of modular tube assemblies having a possibly perforated inner tube of metal or similar plastic material, an outer jacket of metal surrounding it, and a space therebetween for a suitably insulating material layer. The invention further relates to a modular tube assembly of modular-sized pieces for use in air conditioning or the like, at least in its length, each module having a specific metal inner tube and a corresponding outer metal jacket between which is insulated or similar material. floor.

• * t "'· Such modular tubing systems are known in the past to be diverse. For example, a Finnish patent no. 92098 is known as a duct system for insulating ducts, wherein the ends of the modular duct assembly have an annular end flange which is integral with the sleeve-like fastening member to be inserted into the inner duct. At the outer sheath, the end flange is connected via a dielectric portion.,,: A bonding shoulder arranged in the outer sheath, which cooperates with the clamping band connecting the tube module. Reference - '! * The storage, transport and handling of the pipe shown in the publication are difficult due to the protruding flange portion, such that the pipe, for example:> t'. installation requires a larger opening than the pipe.

'. The manufacture of such modular tubes has so far been a rather complicated procedure involving the welding or riveting of various sheet metal parts, as disclosed in said patent. It is an object of the present invention to provide an arrangement, i.e. a method and apparatus, that avoids as many work steps as is necessary to manually process and assemble various sections of a pipe. At the same time, the aim is to develop a pipe that is simple to manufacture and suitable for automatic production.

Said objects are achieved by an arrangement and a product having the features set forth in the appended claims. Thus, the method of the invention is characterized in that the inner tube and outer jacket are placed in a tube longitudinal compression device in which the inner tube and outer jacket are held relative to one another by respective retaining means, and that pressed against the other tube to form at least one annular shoulder fold. in the relevant border area.

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The apparatus implementing the method is characterized by:

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, the device is provided with means for holding the inner tube and / or outer jacket relative to one another in a nested position, mandrel means »*: '* for modifying the end edge of the inner tube and / or outer sheath •« t' · · such that the end edge or the like, and equipment; ·: To apply the axial clamping force of the inner tube • to said end edge through said mandrel means. a.

The modular tube assembly according to one embodiment of the invention is again characterized in that at least one end of the inner tube ·; ··· and / or the outer jacket has an annular shoulder structure having a substantially arcuate cross section suitably directed to the other tube or the like.

The invention will now be described in more detail with reference to the accompanying drawings, wherein

Figure 1 is a sectional view of a mounting device according to an embodiment of the invention, showing opposite clamping mandrels, retaining means of the modular tube to be formed, and each end of the modular tube being compressed,

Fig. 2 is a sectional view showing one end of the module tube made according to Fig. 1 after the compression step,

Fig. 3 is a sectional view showing a plan view at one end of a solution according to another embodiment,

Fig. 4 is a sectional view, respectively, of one end of a modular tube made in accordance with Fig. 4, in which the inner tube extends at least at one end as an extension sleeve. past the end of the modular tube, «· ·

Figure 5 is a sectional view generally showing a portion of an alternate preferred modular tube which is also ;; · Manufactured by the method and apparatus of the invention, further showing an alternate modular tube extension, Fig. 6 is a sectional view corresponding to the end of another preferred modular tube,

Fig. 7 is a sectional view, respectively, of the end of an alternative * · .. * modular tube, Fig. 8, and a partial sectional view showing one end of a press apparatus according to an embodiment of the invention,

Fig. 9 is a side view of one end of the apparatus of Fig. 8, and 109829 4! Fig. 10 shows another view of the apparatus of Figs. 8 and 9 the mandrel head in the direction A-A, i.e. looking at the mandrel from the module tube being manufactured, the jaw device acting as a holder for the outer jacket of the module tube during compression in the open position.

According to Fig. 1, the manufacturing arrangement according to the invention comprises mutually or generally generally movable opposed forming mandrel means 101, 102, and 101a, 102a for forming the edges of the inner tube sections of the modular tubes.

It should be noted that the mutual movement of the mandrel means within the scope of the invention can also be achieved by moving only one mandrel member against a fixed second mandrel, whereby the pipe sections therebetween must be adapted accordingly to the solution shown in this description. unlike you.

In the embodiment shown, the mandrel means consist of • the central mandrel mandrel 101 and, on the other hand, the mandrel plate 102 which surrounds them generally; "mandrel means 101, 102 have deformable deformations, i.e. mandrel surfaces 103, 103a according to the embodiment shown, which, when pressed, carry out the deformation of the end edges of the tubes. The inner tube portions of the modular tube are formed. on the one hand the inner tube generally referred to as 1 and on the other hand the outer shell surrounding the inner tube 1 referred to as 2 respectively.

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The inner tube 1 and the outer jacket, i.e. in practice tube 2, are generally substantially centered on the same longitudinal axis, but an eccentric arrangement is possible within the scope of the invention. There is an empty space between the inner tube 1 and the outer jacket 2, which is generally, but not necessarily, substantially filled with insulation or other such material 3. Any suitable material, including air, may be insulated, but the use of hard mineral wool has been found to be particularly advantageous, and in particular that the insulating material 3 consists of pre-fabricated rigid trough portions which are substantially surrounded by the inner tube 1 prior to final design. further, during the shaping of the end portions 4, 5 of the nested tubes, the clamping means or jaw members 104 holding the outer sheath 2 are shown.

According to the method according to the invention, the manufacture of the modular tube generally denoted by reference 6 comprises the modification of the end portions 4, 5 of the tubes 1, 2 so that the middle position of the tubes 1,2 after the treatment is maintained during pipe handling and in particular joining successive tubes. In practice, the manufacture of modular pipes is carried out in accordance with the method of the invention, and firstly, an assembly 6a comprising an inner tube 1 and a centralized outer jacket 2 with respect thereto, wherein the insulating layer 3 is preferably two or more. a man in the form of a duct is inserted between them. The inner tube 1 "! Suitably consists of a stainless steel sheet of about 1 mm thickness, e.g. HST-Aisi 3161, whereby a preferred modular tube assembly 6 typically has a diameter of about 175 mm and a length of about 9 mm. 90 mm .Inner tube 1: "is suitably made in a manner known per se so that the longitudinal seam of the · · · V tube 1 is preferably formed so that the inner surface of the final tube remains smooth, after which the tube blank is circular and the seam welded. The tube is particularly suitable for a variety of media, including hot flue gases and the like.

The outer shell 2 of the aforementioned popular modular tube 6 is suitably formed in a corresponding manner so that it has a diameter of about 295 mm, respectively. and 1000 mm respectively. In this case, the material may be, for example, a black sheeting which, when finished, is painted in the desired color. Preferably, at least one end 7, 8 of the outer jacket tube 2 and, in some embodiments, the inner tube 1, known per se 109829 6, is formed at a distance 7,8 from the end edge 4, 5 of the tube 1, 2, usually towards the insulating space 3. or these I steps 7, 8 form the processing of pipes 1, 2, | predefined breakpoints. The friction 9 formed separately on the outer sheath 2 again forms a bonding shoulder, i.e. a receiving groove, for a known clamping band (not shown) connecting sequential modular tube arrangements. Since, unlike the prior art, this slit 9 is preferably grooved from the outer surface of the jacket 2 towards the central axis, the module tube 6 is thus substantially cylindrical without the prior art projecting collar impeding storage, transport and installation. The pipes thus formed can still be connected in series using known clamping techniques.

Thus the prefabricated inner tube and the outer jacket 1, 2 ·, · respectively. is assembled into a composite 6a such that a suitably ductile dielectric material 3 such as mineral wool or the like, preferably in trough form, is inserted between them. When the Mine Insulator 3 is hard, at least a second <* * is performed. · * Of the abovementioned splints 7, 8, 9 only after insulating material 3 has been applied.

After pre-fabrication, the composite package 6a is placed in a compression apparatus according to the invention, generally designated 100. ···. from which the other end of an embodiment is shown

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8 to 10, the other end of the clamping device being substantially the same. As stated above, the forming parts of the compression device consist of the aforementioned central mandrel means 101 and the generally annular mandrel means 102 surrounding them and at the other end the corresponding mandrel means 101a, 102a. The mandrel means 101, 102 and 101a, 102a, respectively, are arranged in the pressing device such that by means of e.g. hydraulic or pneumatic pushers 105 known per se, they are substantially opposed in the longitudinal direction BB of the device 100, the inserted tubes 1, 2 or a prefabricated assembly 6a thereof are subjected to extrusion at their edges 4 and 5 respectively.

The individual mandrel means 101, 101a and 102, 102a, respectively, are also preferably arranged mutually movable in the longitudinal direction of the pressing device 100, e.g. by means of pushing means 106 and 107 known per se. According to one embodiment of the invention, the mandrel means 101, 102 and 101a, 102a, respectively, are further arranged to be rotated vigorously about the longitudinal axis of the pressing device 100.

As shown in Figures 1, 5, 8 and 9, the clamping device is further fitted with means for holding or securing a modular tube assembly 6a or at least an outer jacket 2 in the form of jaw means 104. The jaw means 104 are suitably fitted by the pushing means 108 shown in Fig. 10 to be rotatable so that they can be opened on the one hand for insertion of the assembly 6a and on the other hand, pressed sufficiently to grip the centrally positioned 4 · * · To the outer sheath 2 of the assembly 6a. The jaw means 104 are preferably arranged so that the annular protruding, '·· ridge 109 therein engages the bonding shoulder of the outer sheath 2. This holds the assembly 6a well, in place, and at the same time prevents that glide 9 from collapsing during compression. In this way, the jaw means 104 hold the diaper 2 points, ···, during compression. Correspondingly, the inner tube 1 is held in place by the insulating material <1 M · 3 placed on the assembly 6a and, in a particularly preferred embodiment, by the protruding portion 110 of the central mandrel 101 projecting further into the tube 1. Here, during assembly and compression, the portion 110 supports the inner tube 1 from the inside while ensuring its dimensional accuracy.

Preferably, the aforesaid mandrel means 101, 102 and 101a, 102a and jaw means 104 with guide means 105, 106, 107, 108 are, in accordance with Figures 8 and 9, fitted to their own slings or consoles 111 which are mounted on a common suitably I-rail 112.

Specifically, the forming parts of the mandrel means 101, 101a, 102, 102a have suitably curved mandrel surfaces 103, 103a in contact with the edges 4, 5 of the tubes 1, 2 which, under pressure and possibly under rotation, rotate said edges 4, 5 in the desired direction. , generally facing the space reserved for the insulating material 3. The mandrels 101, 101a and 102, 102a are driven towards each other so that the inner tube and / or outer sheath 1, 2 at their ends 4, 5 preferably "roll" according to the respective radii or other configuration of the mandrel 103, 103a so that the surface of the end of the duct 3 or, in some cases, a separate end flange. In this way, the inner tube, insulating gutter and outer sheath form a solid package and all • f.f ends are flush. After folding, edges 4, 5 * · · “! as shown in Figures 2, 4, 5, 6, and 7, form a-· '* ·. I created a circular and suitably arcuate cross section of the tube of the invention extending along the circumference of the tube 1, 2. or a shoulder pattern with otherwise rounded shape 10.

; "·· As shown in the figures, this shoulder fold may 10

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may vary in different embodiments, depending on the mandrel device used. In this respect, the invention is completely different from the prior art, where the same is meant. In order to hold the parts of the module tube 6 together, separate and separately attachable parts have been used. These emotional

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separate parts according to the invention have been replaced, in accordance with the invention, by the fact that at the end edges of the tubes 1, 2; *. t, 4, 5 directly adjacent to the respective tube 1, 2 a single material shoulder structure 10 or the like.

Fig. 2 shows an embodiment of the modular tube manufactured according to Fig. 1, showing a female extension 11 of an inner tube (not shown) for a possible (not shown) 109829 9 tube 1. This extension 11 is suitably formed in the first compression step so that the central mandrel 101 is with its associated projection 110a, with its associated extension portions 110a, first penetrate into the inner tube 1, suitably about 80 mm in the case of the modular tube described. In the next step, further crimping is carried out to round off the end portions 4, 5 of the inner tube and outer jacket 1, 2 so that the shoulder surfaces 103, 103a are formed.

In the embodiment shown in the figures, the mandrel surfaces 103a fitted to the inner tube 1 are integral with the central turn 101, but may equally well be part of the mandrel plate 102 or be individually movable within the scope of the invention.

In the case shown in Figs. 1 to 4, a special · · · end flange 12 is inserted between the previously formed * 1 »♦ fins 7, 8 and the ends 4, 5 to close the space provided for the insulating material 3. Upon compression, the grooves 7, 8 are folded behind said end flange 12, thereby forming support flanges 7a, 8a. At the same time, the edges 4, 5 fold in front of the end flange 12 against the flange, leaving the flange 12 compressed between the formations 10 'and 7a, 8a. In this way, a double-ended tube is closed at its ends, whereby the space between the tubes 1,2 may be pre-filled with insulation, subsequently filled with insulation, e.g. by blowing, or completely empty. The inner tube 1 may also be, for example, perforated to form a silencer, whereby between the end flange 12 and the shapes 10 and / or 7a, 8a ... 1, a sealing compound or the like is preferably applied before compression.

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Figures 1 and 2 show a solution where the shoulder arrangements 10 at the ends 4, 5 of both the inner tube 1 and the outer jacket 2 are made similar so that the mandrel surfaces 103, 103a are substantially identical in shape to both the hub 101 and the annular or plate-like outer portion 102. The radius of curvature of the ends 4, 5 of the ends 109829 10 in connection with the module tube shown is preferably of the order of 3.5 mm. The rounding in the outer jacket 2 is performed inwardly towards the hub and in the inner tube 1 respectively outwardly away from it. In practice, this is preferably accomplished such that the mandrel surfaces 103, 103a comprise an outermost guide surface 103b generally parallel to the other surface of the tube, which gradually or rapidly turns into an actual bending portion 103c. Within the scope of the invention, it is also possible to produce tubes where the rounding is performed in the opposite direction with respect to the tubes 1, 2 and in particular the outer sheath 2, thereby providing an outwardly facing collar, e.g. In this case, the interlocking of the tubes takes place in another way, e.g. by means of the end flange 12 and two successive support blades 8a which lock it on both sides.

It will be seen from Figures 3 to 7 that different shapes can also be used to shape the inner tube 1 and the end 4, 5 of the outer sheath 2, and. . likewise, the shapes of the different ends of the same tube within the scope of the invention may vary according to the desired appropriate shape, with the corresponding "* mandrel 101, 102 adapted for that shape being used accordingly. FIGS. 2, where instead of the rounded shoulder crease I '·· 10, there are two successive compressed fittings 8, i.e., support flaps 8a in the finished tube. In this embodiment, the inner tube 1 extends at least at one end of the module tube 6: forming a male ···. on sleeve 13.

Figures 1 ... 4 and Fig. 7 show embodiments of the modular tube 6, whereby: ·. A separate end flange 12 is used to achieve sealing. Fig. 7 further shows a solution in which the manufactured modular tube 6 further comprises a special elastic sealing ring 14 with special elastic sealing rings 15. The sealing member 14 is preferably held in place by the flanged edge shoulder 10a and the flange 8a respectively by the pressed end flange 12 and possibly by a separate support flange 12a.

Figures 5 and 6 show a particularly preferred embodiment of the invention, in which the insulating layer 3 itself contributes to both the retention of the modular tube 6 and the tightness between the various tubes. Here, the end flange 12 is completely dropped, and thus the insulating material 3 extends all the way to the end of the modular tube 6, suitably even slightly past it. In this case, a relatively hard, preferably guttered insulation is used, whereby the insulating layer extends functionally uninterrupted past the junctions of the successive modular tubes 6 and suitably simultaneously forms a seal between the different tubes 6. If a particularly effective sealing is desired, the separate sealing ring 14 shown in Fig. 6 may also be used in this embodiment, which is suitably secured by a special tubular retaining ring 16. As can be seen in Figures 5, 6 and 7, the shoulder arrangements 10 of the inner tube and the outer jacket are. . 10a and other designs that can be formed within the scope of the invention; in a quite different manner suitable for the purpose, ·· <· and in the device according to the invention simply * by the design of the mandrel portions 103, 103a, 110 and 110a of the mandrel means 101, 102.

Some of the preferred embodiments of the invention have been described above, but one skilled in the art will appreciate that the invention is: Modifiable in many other ways within the scope of the appended claims, which are hereby incorporated by reference.

Claims (10)

A method of manufacturing a modular measured tube (6), comprising a inner tube (1) and an outer sheath or outer tube (2), an insulating material layer (3) existing therebetween and an annular fold of folding (10, 10a) arranged at at least one end of a similarly arranged tube arrangement, wherein the inner tube (1) and the outer male (2), respectively, are first manufactured in a manner characterized in that the inner tube is positioned. the tube (1) and the outer manifold (2) in a device (100) which provides for pressing in the longitudinal direction of the module tube (6). in which apparatus, by means of the respective holders (101, 101a, 104, 109, 110) in relation to each other, the inner tube (1) and the outer male end (2) are poured into a position with one inside the other, and that moving existing mandrel portions (101, 102, 101a, 102a, 110) at each end of the pressing device (100) to work against a mandrel surface (103, 103a, 103b, 103c) at a gable edge (4, 5) at the interior the tube (1) and / or the outer manifold (2) so that the ··· edge material folds in the direction of the second tube (2 and 1, respectively) to form said fold (10, 10a). t 2. A method according to claim 1, characterized in that, at at least one end of the module tube (6), prior to the pressing between the inner tube (1) and the outer male end (2), a substantially annular gable flange (12) which will lie between the annular shoulder (10) which is formed and the insulating material (3) and / or an annular support and / or tie assembly (7a, 8a, 9) ) formed between the inner tube (1) and the outer manifold (2), suitably providing a sealing material between the end flange (12) and at least one of the abutments (10, 7a, 8a, 9). . in Method according to Claim 1 or 2, characterized in that, before pressing, substantially all of the basic parts (1, 2, 3, 12) of the module tube (6) are assembled into an assembly (6a) which is thus pressed together from each end. to form a coherent structure. 4. A method as claimed in any one of claims 1 to 3, characterized in that the mandrel means (101, 101a, 110) for supporting the inner tube (1) is used to support the inner tube (1) and / or to process the orifice of the inner tube (1) suitably to a female portion (11) for receiving that male portion (13) at a guiding and / or supporting intermediate tube or, in a corresponding manner, another module tube. Apparatus for the manufacture of modular measured tubes (6), which comprise an inner tube (1) and an outer sheath (2) and an insulating material layer (3) present between them; characterized in that the device (100) has means (104, 109, 110) for holding the inner tube (1) and the outer manifold (2) in an internal relationship. position of one where inside one is inside the other, resistive mandrel means (101, 101a, 102, 102a, 103, 103a, 110, 110a) for * i ("machining a gable edge (4, 5) at the inner tube ( 1) <· «* and / or the outer mane (2) so that the gable edge (4, 5) is guided to fold towards the space provided for the insulation (3), and means (105, 106, 107) to bring a compressive force in the axial direction of the inner tube (1) to act on said mandrel means (101, 101a, 102, 102a, 103, 103a, 110, 110a). said gable edges (4, 5) Device according to claim 5, characterized in that the mandrel means (101, 101a, 102, 102a, 103, 103a, 110, 110a) are arranged together or individually movable to process the edges (4, 5). ) at both the inner tube (1) and the outer manifold (2), the working mandrel portion (103a, 103b, 103c) at the means provided for machining the inner tube (1) directed towards the outer manifold (2) and the machining mandrel portion (103, 103b, 103c) arranged for the outer male end (2) correspondingly faces in the direction of the inner tube (1). lv 109829 ί i 7. Apparatus according to claim 5 or 6, characterized in that the mandrel means (101, 101a) arranged for processing the inner tube (1) are provided with a section (110, 110a) projecting into the inner tube (1). which acts as said support means for the inner tube (1), at the same time advantageously acting as means for processing the female portion (11) of the inner tube (1). Device according to any one of claims 5 ... 7, characterized in that the mandrel means (101, 101a, 102, 102a) movable in the longitudinal direction of the pipe (1, 2) arranged for a gable (4, 5) of the tube (1, 2) to be processed comprises at least one annular groove (103, 103a, 103b, 103c) receiving the end edge (4, 5) of the tube (1, 2), wherein there is a first guide edge (103b) which essentially has the same direction as • t · .t. the inner tube (1) and / or in the corresponding way the inner shell (2) of the outer shell and / or in the corresponding way outer surface and ·, ·, which act essentially towards the same, which guide edge joins! Preferably, a tile to the cross-section curves approximately semicircular machining section (103c) which folds the edge (4, 5). Device according to any one of claims 5 to 8, characterized in that a pouring means (104) arranged for the outer man (2) has support means (109) for an advantageous means. annular binder set (9) which is specially arranged on the inner tube (1) and / or the outer male insert (2). A tube arrangement formed by module pieces for use in air conditioning or the like, each module (6) having an inner metal tube (1) of defined length and an outer jacket (2) formed of metal or similar moldable material surrounding the inner tube; and therebetween a layer of insulating material (3), and at which at least one end of the inner tube (1) and / or the outer manifold (2) at one edge (4, 5) there is an annular shoulder (10) which 1β 109829 is directed in the direction of the insulating material layer (3), characterized in that at the substantially beak-shaped fold (10), at least a ring-shaped additional shoulder fold is preferably attached and / or beveled in the longitudinal direction of the arrangement. in that it advantageously extends as a barrier from the surface of the tube in the direction of the center axis of the tube acts as a support shoulder (7a, 8a) for a gable flange (12) and / or as a bee danced (9) to receive a clamping band connecting mutually arranged module tubes (6).