EP0176419A1 - Tube-cleaning device - Google Patents

Tube-cleaning device Download PDF

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Publication number
EP0176419A1
EP0176419A1 EP85401744A EP85401744A EP0176419A1 EP 0176419 A1 EP0176419 A1 EP 0176419A1 EP 85401744 A EP85401744 A EP 85401744A EP 85401744 A EP85401744 A EP 85401744A EP 0176419 A1 EP0176419 A1 EP 0176419A1
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EP
European Patent Office
Prior art keywords
fins
tongue
twisted
axis
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85401744A
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German (de)
French (fr)
Inventor
Patrick Estienne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elf Antar France
Original Assignee
Elf France SA
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Filing date
Publication date
Application filed by Elf France SA filed Critical Elf France SA
Publication of EP0176419A1 publication Critical patent/EP0176419A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • B08B9/0553—Cylindrically shaped pigs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F28F13/125—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation by stirring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies

Definitions

  • the present invention relates to a device for the preventive cleaning of tubes such as elongated tubes of multi-tubular heat exchangers, steam condenser or the like and for improving the heat exchange between the interior of these tubes and the exterior.
  • NICHOLS US Pat. No. 4,174,750 has proposed a twisted strip made of a material such as a plastic, that is to say having a certain flexibility and whose inscribed diameter is substantially less than the inside diameter of the tube so that during its rotation, the strip may or may not be in contact with said wall.
  • the invention provides a device for cleaning elongated tubes in which a fluid circulates and intended for improving the heat transfer between the interior and the exterior of these tubes, said device being constituted by a twisted strip according to a helical shape around an axis of symmetry and intended to be rotated around this axis.
  • the twisted strip is itself constituted by two flexible fins symmetrical with respect to said axis and joined together by a tongue which is itself symmetrical with respect to said axis.
  • the fins are curved, preferably in the opposite direction to the direction of rotation around said axis.
  • the twisted strip according to the invention therefore has torsional rigidity and longitudinal flexibility due to the provision of the central tongue.
  • the flexibility of the fins and their curved shape provide the device with a variable geometry of character that allows the variation in the diameter inscribed by the action 'of the fluid flow inside the tube.
  • the action of the fluid circulating inside the tube on the twisted band imparts to it a rotational movement around the axis and scraping of the fins on the wall, and thus a movement ripples and / or vibration which is mainly due to the longitudinal flexibility of the assembly and which is strongly favored by the curved shape of the fins which allows a variation of the circumscribed circle.
  • Figure 1 the device according to the invention consisting of a twisted band in a helical shape (1) held inside a tube (2) by a fastening system (3) comprising a bearing turning allowing the band (1) to rotate under the effect of the fluid flowing in the tube (2) in the direction of the arrow (6).
  • the fastening device is of the type described in French patent application 83 17820 filed on November 9, 1983.
  • Figure 1 shows only a portion of the length of the device.
  • the twisted strip (1) is constituted by two fins (7) and (8) which are symmetrical with respect to the axis of symmetry (9) which coincides with the axis of rotation of the attachment device (3).
  • the fins (7) and (8) are interconnected by the tongue (10) which is also symmetrical with respect to the axis (9).
  • the fins (7) and (8) and the tongue (10) have the same helical shape.
  • FIG 2 a sectional view in the plane (11) of the device shown in Figure 1.
  • the fin (7) is the upper fin and the fin (8), the lower fin.
  • the lower edge (11) of the fin (7) is connected to the lower edge (12) of the tongue (10) and the upper edge (13) of the fin (8) is connected to the upper edge (14) of the tongue (10).
  • tongue (10) is located opposite the two fins.
  • each of the fins (7) and (8) has a maximum thickness in its central part (15) and (16).
  • This Figure 2 There is shown in this Figure 2 the direction of rotation of the device in operation by the circular arrow (17) and by the reference (18), the circle described by the edges (25) and (26) of the fins. It is understood, from the view of this figure, that the action of the fluid results in two forces which apply to the walls (27) and (28) of the fins and which tends to open the flare and to increase the diameter of the circle (18).
  • the curvature of the fins can be oriented in the opposite direction to the arrow (17).
  • there will be a scraping effect on the wall of the tube while in the second case, there will be a friction effect without scraping.
  • each fin (7) and (8) While the tongue (10) shown in Figure 1 was much narrower than each of the fins (7) and (8), that shown in Figure 3 is wider. The roundness between the tongue and each of the fins is much more open as in Figure 2. The thickness of each fin (7) and (8) is maximum in the central parts (15) and (16).
  • Figure 4 a schematic section of Figure 1 in which there is shown the axis (50) of the tongue (10) and the axes (51) and (52) of the fins. These axes intersect with the angle ⁇ .
  • This angle ⁇ is much less than 90 °, it is of the order of 15 °.
  • this angle is greater than 90 ° C, but less than 180 °.
  • These embodiments will preferably be chosen in the case of low-viscosity liquids and / or in the case where the tube is of short length.
  • the characteristics such as flexibility, material, diameter at rest of the circumscribed circle, value of the angle ⁇ , thickness , no propeller, etc ... are a function of the characteristics of the fluid in circulation such as speed, viscosity, temperature, chemical and mechanical aggressiveness, turbidity, density, nature (liquid, gaseous or mixed), etc ...
  • the devices according to the invention in particular those shown in FIGS. 1, 2 and 3 can be made of any suitable material and this is another advantage of the invention, because the material can be chosen according to the nature of the fluid circulating inside the tube. However, it is preferable to choose a material making it possible to form a strip twisted by extrusion, the strip having for example the profile shown in FIG. 2.
  • a plastic material such as polypropylene, teflon or polyacetal or a composite material may be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Device for the preventative cleaning of elongated tubes, consisting of a strip wound in a helical shape, which comprises two flanges (7, 8) interconnected by a tongue (10). Application to multi-tube exchangers. <IMAGE>

Description

La présente invention concerne un dispositif pour le nettoyage préventif de tubes tels que des tubes allongés d'échangeurs pluritubulaires de chaleur, condenseur de vapeur ou autre et pour l'amélioration des échanges de chaleur entre l'intérieur de ces tubes et l'extérieur.The present invention relates to a device for the preventive cleaning of tubes such as elongated tubes of multi-tubular heat exchangers, steam condenser or the like and for improving the heat exchange between the interior of these tubes and the exterior.

On connaît déjà des réalisations qui tendent à maintenir en permanence propre la surface interne des tubes et permettent d'améliorer le transfert thermique par diminution de l'épaisseur de la couche laminaire en contact avec les parois internes des tubes ainsi que par augmentation du nombre de Reynolds. On a proposé divers dispositifs tels que des brosses ou autres qui se déplacent à l'intérieur du tube sous l'action d'un entraînement mécanique ou hydraulique. On a proposé aussi des moyens permanents constitués par une vis d'Archimède telle que décrite dans le brevet US n° 2 943 845, mais qui présente l'inconvénient majeur d'être rigide et de nécessiter des tubes de grand diamètre.There are already known embodiments which tend to permanently keep the internal surface of the tubes clean and make it possible to improve the heat transfer by reducing the thickness of the laminar layer in contact with the internal walls of the tubes as well as by increasing the number of Reynolds. Various devices have been proposed such as brushes or the like which move inside the tube under the action of a mechanical or hydraulic drive. We have also proposed permanent means constituted by an Archimedes screw as described in US Patent No. 2,943,845, but which has the major drawback of being rigid and of requiring large diameter tubes.

On a aussi utilisé des dispositifs constitués par une bande plate torsadée montée en rotation dans les tubes. Selon le brevet US 3 407 871, on prévoit une bande torsadée rigide et maintenue sous tension pour éviter tout contact entre les côtés de la bande et les parois du tube dans laquelle elle est insérée. Le diamètre inscrit de la bande torsadée selon ce brevet est alors inférieur.au diamètre intérieur du tube.Devices have also been used which consist of a twisted flat band rotatably mounted in the tubes. According to US Patent 3,407,871, a rigid twisted strip is provided and kept under tension to avoid any contact between the sides of the strip and the walls of the tube in which it is inserted. The inscribed diameter of the twisted strip according to this patent is then less than the inside diameter of the tube.

De façon à éviter au maximum le contact de la bande torsadée avec les parois du tube, on a proposé dans le brevet JACOBSEN US n° 1 783 844 d'utiliser une bande rigide qui est maintenue en appui rotatif sur deux butées situées aux extrémités du tube. Cette réalisation est donc limitée aux tubes de petite longueur et parfaitement rectiligne. En plus, ce dispositif nécessite un maintien constant de la longueur de la bande torsadée.In order to avoid as much as possible the contact of the twisted strip with the walls of the tube, it has been proposed in the US JACOBSEN patent n ° 1 783 844 to use a rigid strip which is held in rotary support on two stops situated at the ends of the tube. This embodiment is therefore limited to tubes of short length and perfectly straight. In addition, this device requires a constant maintenance of the length of the twisted strip.

Enfin, on a proposé dans le brevet NICHOLS US 4 174 750 une bande torsadée réalisée en un matériau tel qu'une matière plastique, c'est-à-dire présentant une certaine souplesse et dont le diamètre inscrit est sensiblement inférieur au diamètre intérieur du tube de sorte que lors de sa rotation, la bande puisse être en contact ou non avec ladite paroi.Finally, NICHOLS US Pat. No. 4,174,750 has proposed a twisted strip made of a material such as a plastic, that is to say having a certain flexibility and whose inscribed diameter is substantially less than the inside diameter of the tube so that during its rotation, the strip may or may not be in contact with said wall.

Mais l'utilisation d'une bande plate en matériau souple conduit à un système qui manque de rigidité au couple. Ainsi, l'art antérieur a proposé plusieurs dispositifs, mais qui n'ont jamais pu allier une souplesse longitudinale à une rigidité au couple permettant leur utilisation dans des tubes de grande longueur éventuellement courbés pour lesquels le ou les rayons de courbure autorisent une certaine dilatation différentielle entre les tubes et la calandre extérieure. En outre, pour ces dispositifs, il n'a jamais été prévu une disposition qui élimine ou du moins minimise les risques d'encrassement de la bande torsadée.However, the use of a flat strip of flexible material leads to a system which lacks torque rigidity. Thus, the prior art has proposed several devices, but which have never been able to combine longitudinal flexibility with torque rigidity allowing their use in tubes of great length, possibly bent for which the radius or radii of curvature allow a certain expansion. differential between the tubes and the outer shell. In addition, for these devices, no provision has ever been made which eliminates or at least minimizes the risks of fouling of the twisted strip.

C'est donc l'objet de l'invention de prévoir un dispositif dépourvu des inconvénients de l'art antérieur et qui soit en particulier souple longitudinalement, rigide par rapport à la torsion et dont la géométrie évite au maximum la formation de dépôt sur le dispositif.It is therefore the object of the invention to provide a device devoid of the drawbacks of the prior art and which is in particular longitudinally flexible, rigid with respect to torsion and whose geometry avoids as much as possible the formation of deposits on the device.

Pour cela, l'invention prévoit un dispositif de nettoyage de tubes allongés dans lesquels circule un fluide et destiné à l'amélioration du transfert thermique entre l'intérieur et l'extérieur de ces tubes, ledit dispositif étant constitué par une bande torsadée selon une forme hélicoïdale autour d'un axe de symétrie et destiné à être mis en rotation autour de cet axe.For this, the invention provides a device for cleaning elongated tubes in which a fluid circulates and intended for improving the heat transfer between the interior and the exterior of these tubes, said device being constituted by a twisted strip according to a helical shape around an axis of symmetry and intended to be rotated around this axis.

Selon l'invention, la bande torsadée est elle-même constituée par deux ailettes souples symétriques par rapport audit axe et réunies entre elles par une languette elle-même symétrique par rapport audit axe.According to the invention, the twisted strip is itself constituted by two flexible fins symmetrical with respect to said axis and joined together by a tongue which is itself symmetrical with respect to said axis.

Selon une caractéristique complémentaire de l'invention, les ailettes sont recourbées, de préférence en sens inverse au sens de rotation autour dudit axe.According to an additional characteristic of the invention, the fins are curved, preferably in the opposite direction to the direction of rotation around said axis.

La bande torsadée selon l'invention présente donc une rigidité à la torsion et une souplesse longitudinale du fait de la prévision de la languette centrale. La souplesse des ailettes et leur forme recourbée procurent au dispositif un caractère de géométrie variable qui permet la variation du diamètre inscrit sous l'action 'de la circulation du fluide à l'intérieur du tube.The twisted strip according to the invention therefore has torsional rigidity and longitudinal flexibility due to the provision of the central tongue. The flexibility of the fins and their curved shape provide the device with a variable geometry of character that allows the variation in the diameter inscribed by the action 'of the fluid flow inside the tube.

Lors du fonctionnement de ce dispositif, l'action du fluide en circulation à l'intérieur du tube sur la bande torsadée lui imprime un mouvement de rotation autour de l'axe et de raclage des ailettes sur la paroi, et ainsi qu'un mouvement d'ondulations et/ou de vibration qui est essentiellement dû à la souplesse longitudinale de l'ensemble et qui est fortement favorisé par la forme courbée des ailettes qui autorise une variation du cercle circonscrit.During the operation of this device, the action of the fluid circulating inside the tube on the twisted band imparts to it a rotational movement around the axis and scraping of the fins on the wall, and thus a movement ripples and / or vibration which is mainly due to the longitudinal flexibility of the assembly and which is strongly favored by the curved shape of the fins which allows a variation of the circumscribed circle.

Mais d'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante faite d'une manière uniquement illustrative en référence aux figures annexées dans lesquelles :

  • - la figure 1 est une vue en perspective d'un mode de réalisation d'un dispositif selon l'invention,
  • - la figure 2 est une coupe de la figure 1,
  • - la figure 3 représente un second mode de réalisation de l'invention,
  • - les figures 4a, 4b, 4c représentent des coupes schématiques du dispositif de la figure 1.
However, other characteristics and advantages of the invention will appear on reading the following description made in a purely illustrative manner with reference to the appended figures in which:
  • FIG. 1 is a perspective view of an embodiment of a device according to the invention,
  • FIG. 2 is a section of FIG. 1,
  • FIG. 3 represents a second embodiment of the invention,
  • - Figures 4a, 4b, 4c show schematic sections of the device of Figure 1.

On a représenté sur la figure 1, le dispositif selon l'invention constitué par une bande torsadée selon une forme hélicoidale (1) maintenue à l'intérieur d'un tube (2) par un système d'attache (3) comportant un palier tournant permettant la mise en rotation de la bande (1) sous l'effet du fluide circulant dans le tube (2) dans le sens de la flèche (6). Le dispositif d'attache est du type de celui décrit dans la demande de brevet français 83 17820 déposée le 9 Novembre 1983. La figure 1 représente uniquement une portion de la longueur du dispositif.There is shown in Figure 1, the device according to the invention consisting of a twisted band in a helical shape (1) held inside a tube (2) by a fastening system (3) comprising a bearing turning allowing the band (1) to rotate under the effect of the fluid flowing in the tube (2) in the direction of the arrow (6). The fastening device is of the type described in French patent application 83 17820 filed on November 9, 1983. Figure 1 shows only a portion of the length of the device.

La bande torsadée (1) est constituée par deux ailettes (7) et (8) qui sont symétriques par rapport à l'axe de symétrie (9) qui est confondu avec l'axe de rotation du dispositif (3) d'attache. Les ailettes (7) et (8) sont reliées entre elles par la languette (10) qui est elle aussi symétrique par rapport à l'axe (9). Les ailettes (7) et (8) et la languette (10) présentent la même forme hélicoïdale.The twisted strip (1) is constituted by two fins (7) and (8) which are symmetrical with respect to the axis of symmetry (9) which coincides with the axis of rotation of the attachment device (3). The fins (7) and (8) are interconnected by the tongue (10) which is also symmetrical with respect to the axis (9). The fins (7) and (8) and the tongue (10) have the same helical shape.

On a représenté sur la figure 2 une vue en coupe dans le plan (11) du dispositif représenté figure 1. Sur cette figure 2, l'ailette (7) est l'ailette supérieure et l'ailette (8), l'ailette inférieure. Le bord inférieur (11) de l'ailette (7) est relié au bord inférieur (12) de la languette (10) et le bord supérieur (13) de l'ailette (8) est relié au bord supérieur (14) de la languette (10).There is shown in Figure 2 a sectional view in the plane (11) of the device shown in Figure 1. In this Figure 2, the fin (7) is the upper fin and the fin (8), the lower fin. The lower edge (11) of the fin (7) is connected to the lower edge (12) of the tongue (10) and the upper edge (13) of the fin (8) is connected to the upper edge (14) of the tongue (10).

Ainsi la languette (10) est située en vis-à-vis des deux ailettes.Thus the tongue (10) is located opposite the two fins.

Le bord (11) de l'ailette (7) et le bord (12) de la languette (10) sont réunis selon un arrondi très fermé. Il en est de même pour la languette (10) et l'ailette (8). Chacune des ailettes (7) et (8) possède une épaisseur maximale dans sa partie centrale (15) et (16). On a représenté sur cette figure 2 le sens de rotation du dispositif en fonctionnement par la flèche circulaire (17) et par le repère (18), le cercle décrit par les bords (25) et (26) des ailettes. On comprend, à la vue de cette figure, que l'action du fluide résulte en deux forces qui s'appliquent sur les parois (27) et (28) des ailettes et qui tend à ouvrir l'arrondi et à augmenter le diamètre du cercle (18).The edge (11) of the fin (7) and the edge (12) of the tongue (10) are joined in a very closed rounding. It is the same for the tongue (10) and the fin (8). Each of the fins (7) and (8) has a maximum thickness in its central part (15) and (16). There is shown in this Figure 2 the direction of rotation of the device in operation by the circular arrow (17) and by the reference (18), the circle described by the edges (25) and (26) of the fins. It is understood, from the view of this figure, that the action of the fluid results in two forces which apply to the walls (27) and (28) of the fins and which tends to open the flare and to increase the diameter of the circle (18).

Selon une variante de ce dispositif, on peut prévoit que la courbure des ailettes est orientée dans le sens contraire de la flèche (17). Dans le premier cas, on aura un effet de raclage sur la paroi du tube, alors que dans le second cas, on aura un effet de frottement sans raclage.According to a variant of this device, provision can be made for the curvature of the fins to be oriented in the opposite direction to the arrow (17). In the first case, there will be a scraping effect on the wall of the tube, while in the second case, there will be a friction effect without scraping.

On a représenté sur la figure 3 une variante de réalisation du dispositif selon l'invention pour lequel les mêmes éléments portent les mêmes numéros.There is shown in Figure 3 an alternative embodiment of the device according to the invention for which the same elements have the same numbers.

Alors que la languette (10) représentée figure 1 était beaucoup moins large que chacune des ailettes (7) et (8), celle représentée figure 3 est plus large. L'arrondi entre la languette et chacune des ailettes est beaucoup plus ouvert que dans la figure 2. L'épaisseur de chaque ailette (7) et (8) est maximale dans les parties centrales (15) et (16).While the tongue (10) shown in Figure 1 was much narrower than each of the fins (7) and (8), that shown in Figure 3 is wider. The roundness between the tongue and each of the fins is much more open as in Figure 2. The thickness of each fin (7) and (8) is maximum in the central parts (15) and (16).

On a représenté sur la figure 4 une coupe schématique de la figure 1 sur laquelle on a fait figurer l'axe (50) de la languette (10) et les axes (51) et (52) des ailettes. Ces axes se coupent avec l'angle α. Cet angle α est très inférieur à 90°, il est de l'ordre de 15°. On choisira cette réalisation dans le cas où on cherchera un dispositif représentant une très grande rigidité au couple, par exemple dans le cas où le fluide circulant dans le tube est très visqueux et/ou dans le cas où le tube (2) est très long.There is shown in Figure 4 a schematic section of Figure 1 in which there is shown the axis (50) of the tongue (10) and the axes (51) and (52) of the fins. These axes intersect with the angle α. This angle α is much less than 90 °, it is of the order of 15 °. We will choose this embodiment in the case where we are looking for a device representing a very high torque rigidity, for example in the case where the fluid flowing in the tube is very viscous and / or in the case where the tube (2) is very long .

On a représenté sur la figure 4b une coupe similaire de la figure 3. On remarque que sur cette figure 4b, l'anglec(est très voisin de 90°.There is shown in Figure 4b a similar section of Figure 3. It is noted that in this Figure 4b, the angle (is very close to 90 °.

Sur la figure 4c, cet angle est supérieur à 90°C, mais inférieur à 180°. Ces réalisations seront choisies préférentiellement dans le cas de liquides peu visqueux et/ou dans le cas où le tube est de faible longueur.In Figure 4c, this angle is greater than 90 ° C, but less than 180 °. These embodiments will preferably be chosen in the case of low-viscosity liquids and / or in the case where the tube is of short length.

D'une manière plus générale et ainsi qu'il ressort de la description précédente, en particulier des figures 4a, 4b et 4c, les caractéristiques telles que souplesse, matière, diamètre au repos du cercle circonscrit, valeur de l'angle α, épaisseur, pas d'hélice, etc... sont fonction des caractéristiques du fluide en circulation telles que vitesse, viscosité, température, agressivité chimique et mécanique, turbidité, densité, nature (liquide, gazeux ou mixte), etc...More generally, and as appears from the preceding description, in particular in FIGS. 4a, 4b and 4c, the characteristics such as flexibility, material, diameter at rest of the circumscribed circle, value of the angle α, thickness , no propeller, etc ... are a function of the characteristics of the fluid in circulation such as speed, viscosity, temperature, chemical and mechanical aggressiveness, turbidity, density, nature (liquid, gaseous or mixed), etc ...

Les dispositifs selon l'invention, en particulier ceux représentés figures 1, 2 et 3 peuvent être fabriqués en tout matériau adéquat et c'est là un autre avantage de l'invention, car on pourra choisir le matériau en fonction de la nature du fluide circulant à l'intérieur du tube. Mais on choisira de préférence un matériau permettant d'élaborer une bande torsadée par extrusion, la bande ayant par exemple le profil représenté figure 2.The devices according to the invention, in particular those shown in FIGS. 1, 2 and 3 can be made of any suitable material and this is another advantage of the invention, because the material can be chosen according to the nature of the fluid circulating inside the tube. However, it is preferable to choose a material making it possible to form a strip twisted by extrusion, the strip having for example the profile shown in FIG. 2.

En particulier, on pourra utiliser un matériau plastique tel que le polypropylène, le téflon ou le polyacétal ou encore un matériau composite.In particular, a plastic material such as polypropylene, teflon or polyacetal or a composite material may be used.

Mais on pourra aussi utiliser un dispositif métallique dont le profil est obtenu à partir d'une bande métallique plane de faible épaisseur passant dans des molettes de mise en forme. On procédera ensuite au torsadage, sous tension, de façon à obtenir la forme hélicoïdale voulue. La mise en forme du profil et de la forme hélicoïdale se réalise en continu sur une machine spécifique.However, it is also possible to use a metal device, the profile of which is obtained from a flat metal strip of small thickness passing through shaping wheels. We will then proceed to twisting, under tension, so as to obtain the desired helical shape. The shaping of the profile and the helical shape is carried out continuously on a specific machine.

L'invention n'est pas limitée aux modes de réalisation décrits, elle en englobe au contraire toutes les variantes.The invention is not limited to the embodiments described, on the contrary it encompasses all variants.

Claims (10)

1 - Dispositif de nettoyage préventif de tubes allongés dans lesquels circule un fluide, et destiné à améliorer le transfert thermique entre l'intérieur et l'extérieur de ces tubes, ledit dispositif étant constitué par une bande torsadée, selon une forme hélicoïdale, autour d'un axe longitudinal de symétrie et destiné à être mis en rotation autour de cet axe sous le simple effet de la circulation du fluide caractérisé en ce que ladite bande torsadée est symétrique par rapport audit axe et constituée par deux ailettes (7) et (8) réunies entre elles par une languette (10) torsadée selon la même forme hélicoïdale.1 - Device for preventive cleaning of elongated tubes in which a fluid circulates, and intended to improve the heat transfer between the interior and the exterior of these tubes, said device being constituted by a twisted band, in a helical shape, around '' a longitudinal axis of symmetry and intended to be rotated about this axis under the simple effect of the circulation of the fluid characterized in that said twisted strip is symmetrical with respect to said axis and constituted by two fins (7) and (8 ) joined together by a tongue (10) twisted according to the same helical shape. 2 - Dispositif selon la revendication 1, caractérisé en ce que les ailettes sont souples et recourbées.2 - Device according to claim 1, characterized in that the fins are flexible and curved. 3 - Dispositif selon la revendication 2, caractérisé en ce que les ailettes sont recourbées dans le sens de sa rotation autour dudit axe.3 - Device according to claim 2, characterized in that the fins are curved in the direction of its rotation about said axis. 4 - Dispositif selon la revendication 1, caractérisé en ce que chacune des deux ailettes est reliée à la languette avec un angle inférieur à 90°C.4 - Device according to claim 1, characterized in that each of the two fins is connected to the tongue with an angle less than 90 ° C. 5 - Dispositif selon la revendication 1, caractérisé en ce que chacune des deux ailettes est reliée à la languette avec un angle supérieur ou égal à 90°C, mais inférieur à 180°C.5 - Device according to claim 1, characterized in that each of the two fins is connected to the tongue with an angle greater than or equal to 90 ° C, but less than 180 ° C. 6 - Dispositif selon la revendication 1, caractérisé en ce que l'angle est choisi de façon à ce que la languette soit complétement en vis-à-vis des deux ailettes.6 - Device according to claim 1, characterized in that the angle is chosen so that the tongue is completely vis-à-vis the two fins. 7 - Dispositif selon l'une des revendications 4 ou 5, caractérisé en ce que les ailettes comportent une zone centrale de plus grande épaisseur.7 - Device according to one of claims 4 or 5, characterized in that the fins have a central zone of greater thickness. 8 - Dispositif selon la revendication 1, caractérisé en ce que la bande torsadée est métallique.8 - Device according to claim 1, characterized in that the twisted strip is metallic. 9 - Dispositif selon la revendication 1, caractérisé en ce que la bande torsadée est en un matériau plastique tel que le polypropylène, le téflon ou le polyacétal.9 - Device according to claim 1, characterized in that the twisted strip is made of a plastic material such as polypropylene, teflon or polyacetal. 10 - Dispositif selon la revendication 1, caractérisé en ce que la bande torsadée est en un matériau composite.10 - Device according to claim 1, characterized in that the twisted strip is made of a composite material.
EP85401744A 1984-09-10 1985-09-06 Tube-cleaning device Withdrawn EP0176419A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8413845A FR2570002B1 (en) 1984-09-10 1984-09-10 DEVICE FOR CLEANING TUBES
FR8413845 1984-09-10

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EP0176419A1 true EP0176419A1 (en) 1986-04-02

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EP85401744A Withdrawn EP0176419A1 (en) 1984-09-10 1985-09-06 Tube-cleaning device

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EP (1) EP0176419A1 (en)
FR (1) FR2570002B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104624579A (en) * 2015-01-23 2015-05-20 辽宁石油化工大学 Plugging relief and dredging method and device for crude oil pipeline coagulation section
CN106736328A (en) * 2016-11-30 2017-05-31 重庆渝青机械配件制造有限公司 Many bond type spoiler processing technologys

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2349841A (en) * 1942-07-01 1944-05-30 Northern Blower Company Apparatus for cooling gas
FR2442421A1 (en) * 1978-11-24 1980-06-20 Ferodo Sa IMPROVEMENTS TO TUBULAR HEAT EXCHANGERS AND AGITATORS INTENDED FOR SUCH EXCHANGERS
EP0072996A1 (en) * 1981-08-19 1983-03-02 Mihama Manufacturing Co., Ltd. Plastic turbulence inducing member

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2349841A (en) * 1942-07-01 1944-05-30 Northern Blower Company Apparatus for cooling gas
FR2442421A1 (en) * 1978-11-24 1980-06-20 Ferodo Sa IMPROVEMENTS TO TUBULAR HEAT EXCHANGERS AND AGITATORS INTENDED FOR SUCH EXCHANGERS
EP0072996A1 (en) * 1981-08-19 1983-03-02 Mihama Manufacturing Co., Ltd. Plastic turbulence inducing member

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104624579A (en) * 2015-01-23 2015-05-20 辽宁石油化工大学 Plugging relief and dredging method and device for crude oil pipeline coagulation section
CN106736328A (en) * 2016-11-30 2017-05-31 重庆渝青机械配件制造有限公司 Many bond type spoiler processing technologys
CN106736328B (en) * 2016-11-30 2021-02-09 重庆渝青机械配件制造有限公司 Processing technology of multi-ligament spoiler

Also Published As

Publication number Publication date
FR2570002B1 (en) 1987-03-20
FR2570002A1 (en) 1986-03-14

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