FI103606B - Apparatus and method for manufacturing a coated coiled tube and a coated coiled tube - Google Patents

Description

103606

The present invention relates to an apparatus for producing a coiled-threaded coiled tubular pipe, and to an apparatus for the production of a coiled the coating means for coating the tube comprising a plurality of sequentially operating parallel coating stations, each of which is provided with feeders for continuously feeding the coating material web to the immediately preceding production step; i, which the thread machine itself applies to the threaded pipe in connection with its manufacture.

The invention also relates to a method of fabricating a coated pipe, wherein the coiling of the threaded pipe is performed substantially simultaneously in the manufacture of the pipe, using a conventional spiral sealing device known per se, each wrapping operation utilizing the movement that the twisting joint machine applies to the twisting seam tube during its manufacture, to wrap the following separate coating layers on said tube and the preceding layer, respectively. - * · * * le. The invention further relates to a coated threaded · ··· pipe having an inner threaded core pipe and at least * · «· two directly overlapping coating layers.

Conventionally, the production and coating of a threaded pipe is clearly carried out in separate operations. For example, the threaded 2 103606 sealed tube is manufactured by any method known per se and is then formed into tubes of a desired length. Such prefabricated tubular bodies are subsequently retrofitted with a suitable coating.

Due to the multiple work stages, known methods are time consuming and laborious. In addition, fitting the coating over a tubular piece of a certain length, particularly at the ends of the tubular member, is, firstly, cumbersome and requires considerable precision and, on the other hand, requires additional work steps due to the end fitting or leveling.

It is an object of the present invention to provide an arrangement which avoids the aforementioned drawbacks and enables the production of a coated threaded sealed pipe in a flexible manner and by simple means. This object is achieved by an apparatus which is characterized in that each subsequent coating station is alternately arranged to alternately coat the treated pipe section departing from the preceding position by feeding the respective web layer substantially directly over a web which has already been fed to the preceding web. can be configured to operate according to the type of cover required.

Again, the method according to the invention is characterized in that each coating layer is optionally fed onto one another in substantially sequential operations, whereby essentially: continuous overlapping coating; - the threaded pipe with layers is cut to last. after its coating step, tubing pieces of desired length. to achieve this. Further, the tube according to the invention is characterized in that each of said coating layers is: · formed separately from a web-like material, wherein each layer of webs has a common rotary structure with said core tube and is arranged at least to some extent, that each coating is helically attached to the underlying layer.

Thus, the production and coating of the threaded pipe is carried out substantially simultaneously and in successive stages on the same production line, wherein the apparatus comprises a threaded machine and feed means arranged in the same production line for feeding the coating material substantially simultaneously in the threaded groove.

The arrangement according to the invention is based on the idea that the optional installation of a threaded pipe surface material or coating is carried out during the manufacture of the pipe, utilizing the rotational movement of the pipe.

Preferably, the apparatus comprises a device fitted in the same production line as the threaded seam machine for finishing the surface of the coated threaded pipe. In addition, the apparatus preferably comprises a cutting device for cutting the threaded pipe with the coating layer to the desired length. therefore pipe pieces.

Such an apparatus enables the method of the invention to be implemented by simple means. The hardware can also provide the widest possible range of end products.

: Y: Optional simultaneous operation gives • ·; * · *; the opportunity to increase production capacity and speed.

*. In addition, a plurality of coating equipment feeding different types of coatings can be fitted to the production line of the coated spiral-seam pipe, which can be actuated according to the particular coating needs. Thus, flexible adaptation of the production line for a wide range of products is also possible.

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Preferably, the production line is also provided with a suitable adjustable cutting device.

The method of the invention utilizes a conventional thread sealing device known per se, wherein each optional coating operation utilizes the movement that the thread sealing machine exerts on the thread sealing tube during its manufacture.

The coated threaded pipe of the invention has an inner threaded core pipe and at least two directly overlapping, separate web-based coating layers, which are arranged. to the core tube substantially simultaneously with this preparation, suitably overlapping slightly so that each coating is helically attached to the underlying layer. The helically sealed tube thus comprises coating turns which are fitted to the helically sealed tube substantially simultaneously with this manufacture.

Preferably, the coiled seaming tube with the coating layer comprises a surface layer applied to the coated coiled seaming tube at substantially the same time. . during manufacturing and coating.

An exemplary embodiment of the invention will be described in more detail below with reference to the accompanying schematic drawing showing the product of a coated threaded pipe. «Tantoline lines.

• · · • · · • »· '. In the production line shown in the drawing, the actual thread. the helical seam machine 2 producing the welded pipe 2 is designated by reference. 1. * * * the welded pipe 2 is supported in the vicinity of the threaded machine 1 by a support ring 3. The material of the pipe to be manufactured may be, for example, galvanized, stainless or acid-proof steel sheet, 5 103606 aluminum or plastic. The actual threaded tube 2 is manufactured in a manner known per se and is not described in further detail herein. A threaded pipe is also a pipe manufactured generally by a threading process and welded by welding.

Next, the production line includes, for example, an insulating material feeding device 4. The insulating material is fed in the form of a strip 41 or a web, preferably via an adhesive pad 42, for securing the insulating material to the spiral seam tube 2. In the next step, for example, additional layers of tape are run over the insulated spiral seam pipe to reinforce the structure. For this, a feeder 5 is arranged adjacent to the production line, which feeds the desired strip material 51, preferably through an adhesive pool 52, to provide attachment.

Prior to finishing the surface of the final product, the spiral seam tube 2 with its coating layers 4, 5 is preferably passed through a device 6 for tensioning the tape layers. This device is handheld. This device 6 also facilitates rotation of the threaded pipe 2, which advantageously affects the power requirement of the threaded machine 1.

• · · · · · · · · · · · · · · · · · · · · Coated spiral seam pipe can be provided with a suitable surface material by means of a feeder 7. Preferably, the surface material to be fed as tape 71 through the sink 72 may be, for example, aluminum foil, hard cardboard, colored '. paper or the like.

The adhesive may be, for example, an adhesive based on a silicate solution ··· or, for example, in terms of fire safety. a glass of water.

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A feeder 8 may further be connected to the production line to provide a suitable outer layer. Preferably, the outer layer is formed of a feeder 8 made of a material 81 which is passed through an adhesive pool 82, which may be, for example, sheet metal, plastic or the like. For example, for the damper, a seam fastening device 9 is also required, which seam according to the thread seam of the threaded pipe 2 of the damper. For example, the fastening device may be so-called. seam die or seam welding device.

The feeders 4, 5, 7 and 8 are positioned at a certain angle with respect to the actual helical seam tube 2 as shown in the drawing such that the helical seam tube rotates to coil the material strips 41, 51, 71 and 81 to form a regular and uniform coating layer.

Preferably, a painting apparatus 10 is also connected to the production line for any necessary painting.

Further, an adjustable cutting device 11 is provided at the end of the production line to cut substantially continuously produced coated threaded seam pipe into desired length pipe pieces 21. The cutting device may advantageously be a saw blade driven in the feed direction of the threaded seam pipe or the like. Thus, the production, coating, finishing, and cutting of the threaded pipe produced in substantially continuous manufacture into tubular pieces of desired size can be carried out continuously in the same production line. In addition, the 1-in-1 treatment connected to the production line can always provide a tailor-made end product.

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The drawing and the description related thereto are only intended to illustrate the basic idea of the invention. The method, arrangement, and product of the invention may vary in detail, such as the type of helical seam machine, the number and alignment of the feed and finish devices, and the coating materials, within the scope of the claims.

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Claims (5)

1. Apparatus for the manufacture of coated spiral seamed tube, to which apparatus belongs a known spiral sewing machine as well as means for coating a spiral seamed tube with a web-shaped coating, which means for coating the tube comprises a plurality of relative to the tube's (2) longitudinally arranged parallel working coating stations where at each there are feeding means (4, 5, 7 and 8, respectively) for feeding a web of coating material (41, 51, 71 and 81, respectively) about a spiral seamed tube (2) which as a continuous function in an immediately preceding production stage is formed in the coil sewing machine (1), each subsequent separate web of coating material (41, 51, 71, 81) being arranged to wrap around the tube simultaneously with and substantially under the influence of the same rotational movement which the coil sewing machine (1) exerts itself on the coiled seam tube (2) in connection with the manufacture of its characterized in that each subsequent coating station (5, 7 and 8) is arranged to in turn selectively coat a treated pipe section which exits from a previous station by feeding a corresponding web layer (51, 71 , 81) substantially directly on top of a saturated web layer (41, 51 and 71) which has already been dispensed at the previous station, whereby each:, feeding device (4, 57 and 8, respectively) can be optionally coupled in • · * · · ·. ·. function according to the respective coating requirements. • · • · i ·· 2. Apparatus according to claim 1, characterized in that the apparatus comprises a device (9, 10) arranged in the same production line for the final φ · · V · treatment of the coil sewing machine. coiled tube surface. 3. Apparatus according to claim 1 or 2, characterized in that the apparatus comprises a cutting apparatus (11) * · i for cutting it with a coating layer (41, 51, 71, 81). Provided spiral-seamed tube in tube pieces (21) of desired length. 103606 4. A coated coiled seam tube with an inner coiled seam core tube (2) and at least two at the same immediately adjacent coating layer (41, 51, 71, 81), characterized in that each of the said coating layers (41, 51, 71, 81) are separately formed of a web-shaped material, each web layer at said core tube (2) having a common rotational structure and arranged at least somewhat overlapping, so that each coating is spirally fixed at the underlying layer. 5. Coated coiled tube according to claim 4, characterized in that at least one of the coating layers comprises a surface layer (81) which is arranged at the coated coiled seam tube (2) in connection with the manufacture and actual coating of the same which has taken place substantially. at the same time, preferably as a final coating action. A method of manufacturing a coated tube, in which a coating of a spiral-seamed tube is carried out substantially simultaneously in connection with the manufacture of the tube, using a commonly known spiral sewing apparatus (1), The coating function utilizes the movement of the spiral sewing machine on it. . . coiled seam tube (2) in connection with the manufacture of the same, to wrap subsequent separate coating layers • (41, 51, 71, 81) on said tube and above on a previous layer (41, 51, respectively). 71), characterized in that selectable layers for each coating layer (41, 51, 71, Ui) are used, one on the other having successive functions, whereby · · · *. the final coating stage essentially cuts the continuous seam (41, 51, 71, 81) coil-seamed (continuous) feed layer (41, 51, 71, 81) seamed to the pipe pieces (21) of the desired ···: length.