FR2838986A1 - Equipment for coating internal surface of inaccessible pipe or duct, e.g. for cable, comprises cylindrical body which has locating wings, orifices for propulsion jets, an anti return skirt and an angled spreading spatula - Google Patents
Equipment for coating internal surface of inaccessible pipe or duct, e.g. for cable, comprises cylindrical body which has locating wings, orifices for propulsion jets, an anti return skirt and an angled spreading spatula Download PDFInfo
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- FR2838986A1 FR2838986A1 FR0205373A FR0205373A FR2838986A1 FR 2838986 A1 FR2838986 A1 FR 2838986A1 FR 0205373 A FR0205373 A FR 0205373A FR 0205373 A FR0205373 A FR 0205373A FR 2838986 A1 FR2838986 A1 FR 2838986A1
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- spatula
- cavity
- coating
- skirt
- tubular element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C7/00—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work
- B05C7/06—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work by devices moving in contact with the work
- B05C7/08—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work by devices moving in contact with the work for applying liquids or other fluent materials to the inside of tubes
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Abstract
Description
Dispositif pour le revatement de la surface interne d'une caviteDevice for flattening the internal surface of a cavity
inaccessible.inaccessible.
La presente invention se rapporte a un procede d'installation d'un element s tubulaire, comme un c&ble ou un tuyou destine a loger un ou plusieurs cables, dans une cavite inaccessible a un operateur, notamment une zone tubulaire comme un reseau de tuyoux, de canalisations ou de conduits, par exemple pour la collecte d'eaux usees. Dans les zones tubulaires, I'inaccessibilite resulte des trop faibles dimensions de leur section de passage. L'invention concerne plus o particu l ierement des operations se derou la nt da ns des cavites tubu la ires souterraines non- pressurisees de faible diametre, en particulier de moins de mm de diametre, tel qu'un egout ou un tuyou d'evacuation d'un batiment, dans lesquels l'acces direct visuel et materiel est impossible. L'invention s'etend en outre au dispositif pour la mise en cauvre de ce procede dans des cavites The present invention relates to a method of installing a tubular element, such as a cable or a pipe intended to accommodate one or more cables, in a cavity inaccessible to an operator, in particular a tubular area such as a network of pipes, pipes or conduits, for example for the collection of wastewater. In the tubular zones, inaccessibility results from too small dimensions of their passage section. The invention relates more particularly to operations taking place in non-pressurized underground tubular cavities of small diameter, in particular of less than 1 mm in diameter, such as a sewer or a discharge pipe. of a building, in which direct visual and material access is impossible. The invention also extends to the device for placing this process in cavities in cavities
s tubulaires de faible diametre.s small diameter tubulars.
Habituellement ['installation d'un element tubulaire, comme un c&ble ou un tuyou destine a loger un ou plusieurs cables, dans une cavite inaccessible Usually the installation of a tubular element, such as a cable or a pipe intended to accommodate one or more cables, in an inaccessible cavity
generalement tubulaire, comporte le plus souvent trots phases principales. generally tubular, most often has three main phases.
Une premiere phase consiste a rendre la paroi interne de la cavite apte a o recevoir ['element tubulaire. Cette phase est principalement une phase d'exploration et de nettoyage des pa rois de la cavite. Si la pa roi interne de la cavite est deg radee, il peut 8tre necessa ire de combler certa ines depressions a ['aide d'un ciment ou mastic. Le document US-4, 782,786 decrit un dispositif d'enduction destine a deposer et etaler un mastic. Le mastic est contenu dans un s tube amovible place sur un chariot commande a distance. Le contenu du tube est vice au moyen d'un piston mobile sous ['action de l'air comprime amene par une canalisation. Le dispositif d'enduction comprend une spatule elastique et une buse dans laquelle debouche le tuyou amenant le mastic. Ce dispositif peut effectuer une rotation autour de son axe longitudinal. La buse et la spatule peuvent s'etendre et de retracter dans une direction transversale par rapport a cet axe. Le dispositif peut s'adapter a differents diametres de conduite grace a un A first phase consists in making the internal wall of the cavity able to receive the tubular element. This phase is mainly a phase of exploration and cleaning of the walls of the cavity. If the internal wall of the cavity is damaged, it may be necessary to fill in certain depressions with a cement or putty. Document US Pat. No. 4,782,786 describes a coating device intended for depositing and spreading a putty. The putty is contained in a removable tube s placed on a remote control cart. The contents of the tube are vice by means of a piston movable under the action of compressed air brought by a pipe. The coating device comprises an elastic spatula and a nozzle into which the pipe leading to the sealant opens. This device can rotate around its longitudinal axis. The nozzle and the tip can extend and retract in a direction transverse to this axis. The device can be adapted to different pipe diameters thanks to a
parallelogramme articule.articulated parallelogram.
Dans une deuxieme phase, on met en place un moyen destine a maintenir ['element tubulaire dans la position qui lui a ete assignee. II s'agit la plupart du temps d'un systeme comprenant des elements de maintien repartis regulierement sur la paroi de la cavite. Plusieurs procedes consistent a chemiser la surface s interieure de la cavite a ['aide diune peau qui est introduite dans la cavite puis appliquee sur cette surface par divers moyens. Mais ces techniques vent couteuses et ne se justifient que dans le cas de parois tres degradees. On a aussi propose de In a second phase, a means is put in place intended to maintain the tubular element in the position which has been assigned to it. It is most of the time a system comprising holding elements distributed regularly over the wall of the cavity. Several methods consist in lining the interior surface of the cavity with the aid of a skin which is introduced into the cavity and then applied to this surface by various means. But these techniques are expensive and are only justified in the case of very degraded walls. We also proposed
revetir la surface interieure de la cavite en lui appliquant une couche de peinture. coat the interior surface of the cavity with a coat of paint.
Le brevet US-4,249,485 decrit un appareil de traitement de la totaiite de la io surface interieur d'un tuyou, utilisable notamment pour la peinture ou le revetement. Les moyens de traitement effectuent un mouvement en spirale ou helicodal le long de l'axe longitudinal de l'appareil de maniere a permettre le recouvrement de deux couches successives. Le produit a appliquer est d'abord introduit dans le tuyou. Puis le produit est balaye par les brosses en rotation qui is s'essuient ensuite sur les parois du tuyou. Ces couches generalement de faible US Pat. No. 4,249,485 describes an apparatus for treating the entire internal surface of a pipe, which can be used in particular for painting or coating. The processing means perform a spiral or helical movement along the longitudinal axis of the device so as to allow the recovery of two successive layers. The product to be applied is first introduced into the pipe. Then the product is swept by the rotating brushes which is then wiped on the walls of the pipe. These generally weak layers
epaisseur se decollent rapidement sous l'effet du vieillissement. thickness quickly peel off under the effect of aging.
Une troisieme phase est ['installation proprement cite d'un element tubulaire dans la cavite. L'element tubulaire est entrane dans la cavite par un moyen mobile, puis mis en place et retenu dans le systeme de maintien prealablement fixe. Dans certains cas les deuxieme et troisieme phases peuvent etre realisees simultanement. Par exemple le document DE198 26 880 decrit un dispositif de retenue d'un cable utilisant un element en plastique a memoire de forme qui adopte la forme souhaitee sous l'effet du chauffage ou de l'humidite afin de plaquer le c&ble contre la paroi interne de la cavite. Utilise sur toute la A third phase is the proper installation of a tubular element in the cavity. The tubular element is entrainée in the cavity by a mobile means, then set up and retained in the previously fixed holding system. In some cases the second and third phases can be carried out simultaneously. For example the document DE198 26 880 describes a cable retaining device using a plastic element with shape memory which adopts the desired shape under the effect of heating or humidity in order to press the cable against the internal wall cavity. Use all over
longueur d'une cavite tubulaire, ce procede se revere particulierement onereux. length of a tubular cavity, this method is particularly expensive.
La presente invention a pour but de proposer un dispositif pour le revetement de la surface interne d'une cavite inaccessible d'utilisation simple qui permette d'obtenir une couche de revetement epaisse, au moins partiellement The object of the present invention is to propose a device for coating the internal surface of an inaccessible cavity of simple use which makes it possible to obtain a thick coating layer, at least partially.
autoportante et de longue duree de vie. self-supporting and long-lasting.
L'invention a aussi pour but de proposer un procede d'installation d'un element tu bu la ire da ns une cavite inaccessible a u n operateur, tel qu'un cable ou un tuyou destine a loger un ou plusieurs cables, qui elimine les inconvenients de l'art anterieur. Notamment le procede propose est plus rapide et moins couteux Another object of the invention is to propose a method of installing an element you drink in a cavity inaccessible to an operator, such as a cable or a hose intended to accommodate one or more cables, which eliminates the drawbacks. prior art. In particular the proposed process is faster and less expensive
que les procedes connus.than known processes.
La presente invention a pour objet un dispositif pour le revetement de la surface interne d'une cavite inaccessible ayant sensiblement la forme d'un cylindre de revolution autour d'un axe longitudinal, dispositif comprenant un moyen de deplacement commande a distance, un moyen d'alimentation en agent de s revetement et un moyen d'application audit agent. Le moyen d'application comprend une spatule et une jupe anti- retour disposees parallelement le long audit axe longitudinal, et ['agent de revetement est amene de maniere continue au niveau d'un orifice situe entre ladite spatule et ladite jupe a ['aide audit moyen d'alimentation. to La distance entre l'axe longitudinal de la cavite et l'extremite externe de la spatule est inferieure au rayon moyen de la cavite d'une valeur qui depend de l'epaisseur de la couche de revetement a deposer. En raclant ['agent de revetement qui s'est depose sur la paroi, la spatule en lisse la surface et en regularise l'epaisseur, quel que soit l'etat de surface sous-jacent: les depressions vent The present invention relates to a device for coating the internal surface of an inaccessible cavity having substantially the shape of a cylinder of revolution around a longitudinal axis, device comprising a means of remote control displacement, a means of supply of coating agent and a means of application to said agent. The application means comprises a spatula and a non-return skirt arranged parallel along said longitudinal axis, and the coating agent is brought continuously at an orifice located between said spatula and said skirt using said supply means. to The distance between the longitudinal axis of the cavity and the outer end of the spatula is less than the average radius of the cavity by a value which depends on the thickness of the coating layer to be deposited. By scraping the coating agent which has deposited on the wall, the spatula smoothes the surface and regularizes its thickness, whatever the underlying surface condition: the wind depressions
is comblees et les asperites gommees. is filled and erased asperites.
Selon un mode de realisation prefere, I'extremite externe de ladite spatule According to a preferred embodiment, the external end of said spatula
forme un angle d'environ 15 avec iedit axe longitudinal. forms an angle of about 15 with said longitudinal axis.
Selon un autre mode de realisation prefere, I'extremite externe de ladite spatule se termine par un angle vif. Cet angle permet une bonne application de According to another preferred embodiment, the outer end of said spatula ends in a sharp angle. This angle allows good application of
I'agent sans adherence sur la spatule. Agent without adhesion to the spatula.
Selon encore un autre mode de realisation, la spatule a la forme d'un corps creux en matericu flexible dont la forme est susceptible d'etre modifiee sous ['action d'un gaz sous pression. On peut ainsi modifier la hauteur de la spatule, done l'epaisseur de la couche de revetement, en augmentant ou reduisant la According to yet another embodiment, the spatula has the shape of a hollow body of flexible material whose shape is capable of being modified under the action of a gas under pressure. It is thus possible to modify the height of the spatula, therefore the thickness of the coating layer, by increasing or reducing the
pression de gaz (notamment d'air) a 1'interieur de la poche. gas pressure (especially air) inside the pocket.
Selon encore un autre mode de realisation, I'extremite externe de ladite spatule est equipee d'un moyen de chauffage permettant d'accelerer la According to yet another embodiment, the outer end of said spatula is equipped with a heating means making it possible to accelerate the
solidification de ['agent de revetement. solidification of the coating agent.
Avantageusement, la spatule est libre de se positionner dans le flux sortant d'agent de revetement de maniere a realiser un auto-centrage dans la cavite, y Advantageously, the spatula is free to position itself in the outgoing flow of coating agent so as to achieve self-centering in the cavity, including
compris dans les portions non-rectilignes. included in non-straight portions.
La distance entre l'axe longitudinal de la cavite et l'extremite externe de la jupe est sensiblement du meme ordre que le rayon de la cavite. L'agent de revetement surgit entre la spatule et la jupe et se repand sur la portion de surface limitee par la spatule et la jupe, avant d'etre lisse par la spatule sous l'effet du deplacement du dispositif. La jupe empeche ['agent de revetement de recouvrir la portion de surface situee en avant et non encore revetue. Seule la surface a revetir est recouverte par ['agent ce qui evite les pertes de matiere. En outre ['agent de s revetement est applique immediatement apres son depot avant que debute sa solidification. Le dispositif selon ['invention permet l'emploi d'un agent de revetement a prise relativement rapide et ainsi une reduction du temps et du cout The distance between the longitudinal axis of the cavity and the outer end of the skirt is substantially of the same order as the radius of the cavity. The coating agent arises between the spatula and the skirt and spreads over the portion of surface bounded by the spatula and the skirt, before being smooth by the spatula under the effect of the displacement of the device. The skirt prevents the coating agent from covering the surface portion located in front and not yet coated. Only the surface to be coated is covered by the agent, which prevents material loss. In addition, the coating agent is applied immediately after its deposit before solidification begins. The device according to the invention allows the use of a relatively rapid setting coating agent and thus a reduction in time and cost.
de ['operation.of the operation.
De preference, I'extremite externe de la jupe se termine par une surface o plane parallele a l'axe longitudinal. Avantageusement la jupe est realisee dans un materiau flexible, comme de la gomme, et la partie plane s'applique souplement Preferably, the outer end of the skirt ends in a planar surface parallel to the longitudinal axis. Advantageously, the skirt is made of a flexible material, such as rubber, and the flat part is applied flexibly.
contre la paroi assurant ainsi une bonne etancheite a l'egard des projections. against the wall thus ensuring a good seal against projections.
Selon une variante de realisation, I'extremite externe de ladite jupe est equipee d'un moyen de chauffage permettant d'accelerer la solidification de According to an alternative embodiment, the external end of said skirt is equipped with a heating means making it possible to accelerate the solidification of
s ['agent de rev8tement.s ['coating agent.
La spatule et la jupe peuvent avoir une forme sensiblement tronconique. The spatula and the skirt may have a substantially frustoconical shape.
La spatule et la jupe peuvent aussi avoir la forme d'une portion de cone. The spatula and the skirt can also have the shape of a cone portion.
Selon une autre forme d'execution, la spatule peut etre de forme plane. According to another embodiment, the spatula can be of planar shape.
Le moyen d'alimentation en agent de revetement comporte un moyen d'admission des constituants de 1'agent de revetement, un moyen de melange de ces constituants et un moyen d'amenee de ['agent de revetement au niveau du The coating agent supply means comprises a means for admitting the constituents of the coating agent, a means for mixing these constituents and a means for supplying the coating agent to the level of the coating agent.
moyen d'application.means of application.
Le moyen d'admission comprend notamment une premiere entree pour une resine reticulable et une deuxieme entree pour un agent de reticulation, notamment un durcisseur. Ces entrees communiquent avec le moyen de melange The admission means notably comprises a first entry for a crosslinkable resin and a second entry for a crosslinking agent, in particular a hardener. These inputs communicate with the mixing medium
par des canaux.through channels.
Le deplacement de l'appareil selon ['invention dans une cavite inaccessible doit etre commande a distance. Le moyen de deplacement peut 8tre choisi parmi un moyen de propulsion et un moyen de traction. Le moyen de traction est par exemple un systeme utilisant des cordes. Le moyen de propulsion peut etre un moyen pneumatique. Dans ce dernier cas le gaz utilise peut etre chaud de maniere a accelerer le sechage de l'interieur de la cavite d'une part, et la The movement of the apparatus according to the invention in an inaccessible cavity must be controlled remotely. The displacement means can be chosen from a propulsion means and a traction means. The means of traction is for example a system using ropes. The propulsion means can be pneumatic means. In the latter case the gas used may be hot so as to accelerate the drying of the interior of the cavity on the one hand, and the
solidification par reaction chimique (reticulation) de la resine d'autre part. solidification by chemical reaction (crosslinking) of the resin on the other hand.
L'avantage de ces moyens de deplacement est ['absence d'energie electrique. D'une part ceci facilite la miniaturisation de l'appareil qui peut ainsi acceder a des zones tubulaires dont le diametre est inferieur a 200mm. D'autre part la securite d'utilisation de cet appareil est amelioree par ['absence de courant The advantage of these means of displacement is the absence of electrical energy. On the one hand this facilitates the miniaturization of the device which can thus access tubular zones whose diameter is less than 200mm. On the other hand, the safety of use of this device is improved by the absence of current.
s electrique dans une zone difficilement controlable. s electric in an area that is difficult to control.
Selon un premier mode de realisation de ['invention, le dispositif a sensiblement la forme generale d'un cylindre de revolution. Le dispositif peut comporter en outre un moyen de positionnement dans l'espace a l'interieur de la cavite. En effet l'axe longitudinal de la cavite peut 8tre rectiligne ou bien plus ou o moins courbe. Le dispositif doit pouvoir suivre ces changements d'orientation tout According to a first embodiment of the invention, the device has substantially the general shape of a cylinder of revolution. The device may further include means for positioning in space inside the cavity. Indeed the longitudinal axis of the cavity can be rectilinear or more or less curved. The system must be able to follow these changes in orientation while
en gardant la position necessaire a la qualite du revetement. keeping the position necessary for the quality of the coating.
Selon une variante d'execution, le moyen de positionnement peut comprendre des ailettes disposees radialement, la distance entre l'axe longitudinal et i'extremite externe d' u ne a i l ette eta nt se ns i blement d u meme o rd re q ue le rayon is de la cavite. Les ailettes vent avantageusement realisees dans un materiou souple, comme de la gomme, et leur extremite s'applique contre la paroi assurant ainsi un positionnement gable du dispositif dans la cavite Selon une autre variante d'execution, le moyen de positionnement peut comprendre un corps creux en materiou flexible, comme par exemple de la o gomme, dont la forme est susceptible d'etre modifiee sous ['action diun gaz sous pression. On peut ainsi modifier son encombrement en augmentant ou reduisant According to an alternative embodiment, the positioning means may comprise fins arranged radially, the distance between the longitudinal axis and the external end of a wing is and is not necessarily the same as that of the radius is of the cavity. The fins are advantageously made of a flexible material, such as rubber, and their ends are applied against the wall, thus ensuring gable positioning of the device in the cavity. According to another alternative embodiment, the positioning means can comprise a body. hollow in flexible material, such as, for example, gum, the shape of which is liable to be modified under the action of a gas under pressure. We can thus change its size by increasing or reducing
la pression de gaz (notamment d'air) a l'interieur de la poche. the pressure of gas (in particular air) inside the pocket.
Selon un deuxieme mode de realisation de ['invention, le dispositif comprend au moins deux spheres reliees par une portion rectiligne. Les spheres 2s permettent un auto-centrage du dispositif dans la cavite; la presence d'un autre moyen de positionnement n'est done plus necessaire. Les portions rectilignes vent avantageusement flexibles afin de faciliter le deplacement du dispositif dans les parties de la cavites qui ne vent pas totalement rectilignes. A tout moment le centrage du dispositif dans la cavite est assure par les spheres, y compris dans le so cas ou ces spheres ne se trouvent plus dans le prolongement rectiligne l'une de l'autre. Selon une premiere variante, le dispositif comporte en outre un moyen de visualisation de la cavite a l'arriere du dispositif. De preference le moyen de visualisation est un dispositif de prise de vue tel qu'une camera video. Ies donnees vent visualisees par exemple sur un ecran et l'operateur peut ainsi de l'exterieur According to a second embodiment of the invention, the device comprises at least two spheres connected by a rectilinear portion. The spheres 2s allow the device to self-center in the cavity; the presence of another positioning means is therefore no longer necessary. The rectilinear portions are advantageously flexible in order to facilitate the movement of the device in the parts of the cavities which are not completely rectilinear. At all times the centering of the device in the cavity is ensured by the spheres, including in the case where these spheres are no longer in the straight extension of one another. According to a first variant, the device further comprises a means of viewing the cavity at the rear of the device. Preferably the display means is a shooting device such as a video camera. Wind data displayed for example on a screen and the operator can thus from outside
controler le travail qui vient d' tre effectue. check the work that has just been done.
Selon une deuxieme variante, le dispositif comporte en outre un moyen d'eclairage de ladite cavite. De facon classique le moyen d'eclairage peut 8tre s constitue par une ampoule electrique, mais on utilisera de preference au moins According to a second variant, the device further comprises a means of lighting said cavity. Conventionally, the lighting means can be constituted by an electric bulb, but preferably at least one will be used
une fibre optique alimentee par une source lumineuse placee a l'exterieur. an optical fiber powered by a light source placed outside.
Selon une troisieme variante, le dispositif comporte en outre un moyen de guidage d'un element tubulaire, par exemple une gorge. L'appareil selon ['invention est destine plus particulierement a etre utilise pour des zones tubulaires io de diametre inferieur a 200mm, de preference de diametre inferieur a 150mm, According to a third variant, the device further comprises means for guiding a tubular element, for example a groove. The apparatus according to the invention is intended more particularly to be used for tubular zones io of diameter less than 200mm, preferably of diameter less than 150mm,
mais de preference ayant un diametre d'au moins 80mm. but preferably having a diameter of at least 80mm.
L'appareil selon ['invention peut aussi etre employe pour effectuer la pose d'un element tubulaire, tel qu'un cable ou un tuyou destine a loger un ou plusieurs cables, dans une cavite tubulaire de faible diametre comme une canalisation The apparatus according to the invention can also be used for laying a tubular element, such as a cable or a pipe intended to accommodate one or more cables, in a tubular cavity of small diameter such as a pipe.
d'egout.disgust.
L'invention a aussi pour objet un procede d'installation d'un element tubulaire dans une cavite inaccessible au moyen du dispositif decrit precedemment. Ce procede comprend notamment les etapes suivantes: - on dispose ['element tubulaire dans la cavite, - on introduit le dispositif dans la cavite et on le place au niveau de l'une des extremites de ['element tubulaire, - puis on deplace le dispositif le long de ['element tubulaire simultanement a ['operation de rev8tement, de maniere a recouvrir ['element tubulaire avec ['agent The invention also relates to a method of installing a tubular element in a cavity inaccessible by means of the device described above. This process comprises in particular the following stages: - the tubular element is placed in the cavity, - the device is introduced into the cavity and it is placed at one of the ends of the tubular element, - then the device along the tubular element simultaneously with the coating operation, so as to cover the tubular element with the agent
de revetement.of coating.
Selon une variante de mise en ceuvre de ['invention, element tubulaire est dispose dans la cavite simultanement a ['introduction du dispositif. Une fois ['element tubulaire mis en place, le dispositif est deplace le long de ['element According to a variant implementation of the invention, the tubular element is placed in the cavity simultaneously with the introduction of the device. Once the tubular element is in place, the device is moved along the element
tubulaire, en sens inverse de la direction de son introduction. tubular, opposite to the direction of its introduction.
Selon une autre variante de mise en ceuvre, I'operation de revetement est realisee simultanement a ['introduction du dispositif, I'element tubulaire ayant ete prealablement dispose dans la cavite. Le dispositif est alors deplace le long de According to another variant of implementation, the coating operation is carried out simultaneously with the introduction of the device, the tubular element having been previously placed in the cavity. The device is then moved along
['element tubulaire dans la direction de son introduction. ['tubular element in the direction of its introduction.
Avantageusement ce deplacement est effectue avec une vitesse uniforme, ce qui permet de deposer une quantite egale d'agent de revetement sur toute la longueur de la paroi. Eta nt donne que l'epaisseur de la couche de rev8tement est fixce et constante, le depot d'un exces de matiere risquerait de perturber ['operation de revetement notamment en provoquant l'engorgement du moyen d'alimentation. En se solidifiant, I'agent de revetement assurera la fixation de ['element s tubulaire sur la paroi. L'agent de revetement est depose sous la forme d'une couche d'epaisseur au moins egale a 0,5mm, de preference comprise entre 1 mm et 5mm, et de preference encore de 1'ordre de 2mm a 3mm. L'epaisseur de la couche de revetement depose est suffisante pour assurer le maintien en place du Advantageously, this displacement is carried out with a uniform speed, which makes it possible to deposit an equal amount of coating agent over the entire length of the wall. Since the thickness of the coating layer is fixed and constant, the deposition of an excess of material would risk disturbing the coating operation, in particular by causing clogging of the supply means. By solidifying, the coating agent will secure the tubular element to the wall. The coating agent is deposited in the form of a layer of thickness at least equal to 0.5 mm, preferably between 1 mm and 5 mm, and more preferably on the order of 2 mm to 3 mm. The thickness of the deposited coating layer is sufficient to ensure that the
revetement, meme en cas de defaut d'adherence sur la paroi. coating, even in the event of a lack of adhesion to the wall.
ioPendant son deplacement le dispositif depose ['agent de revetement longitudinalement au moins sur la portion angulaire de la surface interne ou est place ['element tubulaire. Selon une variante, le dispositif depose ['agent de During its movement, the device deposits the coating agent longitudinally at least on the angular portion of the internal surface where the tubular element is placed. Alternatively, the device for depositing the
revetement longitudinalement sur la totalite de la surface interne de ladite cavite. coating longitudinally over the entire internal surface of said cavity.
L'invention sera mieux comprise et d'autres avantages et particularites The invention will be better understood and other advantages and particularities
s appara^'tront a la lecture de la description qui va suivre de modes de realisation s will appear on reading the following description of embodiments
donnes a titre illustratif, mais nullement limitatif, et dans le dessin annexe sur loquel - la figure 1 represente une vue de cote d'un dispositif selon 1'invention, - la figure 2 est une coupe longitudinale selon le plan 11-11 du dispositif de la figure 1, - la figure 3 est une coupe longitudinale selon un plan perpendiculaire a celui de la figure 2, - la figure 4 est une coupe transversale selon le plan IV-IV du dispositif de la figure 1, - la figure 5 est une coupe transversale selon le plan V-V du dispositif de la figure 1, - la figure 6 est une vue laterale schematique d'une variante du dispositif selon ['invention place da ns une cavite tu bu la ire, - la figure 7 est une representation schematique en perspective du dispositif de la figure 6 utilise pour 1'installation d'un element tubulaire, - la figure 8 est une representation schematique d'un autre dispositif selon ['invention utilise pour ['installation diun element tubulaire, - la figure 9 est une representation schematique d'encore une autre given by way of illustration, but in no way limiting, and in the annexed drawing on loquel - FIG. 1 represents a side view of a device according to the invention, - FIG. 2 is a longitudinal section along the plane 11-11 of the device of Figure 1, - Figure 3 is a longitudinal section along a plane perpendicular to that of Figure 2, - Figure 4 is a cross section along the plane IV-IV of the device of Figure 1, - Figure 5 is a cross section along the plane VV of the device of Figure 1, - Figure 6 is a schematic side view of a variant of the device according to ['the invention places ns a cavity you drank it, - Figure 7 is a representation schematic in perspective of the device of FIG. 6 used for the installation of a tubular element, - FIG. 8 is a schematic representation of another device according to the invention used for the installation of a tubular element, - FIG. 9 is a schematic representation yet another
variante du dispositif selon ['invention. variant of the device according to the invention.
Le dispositif selon ['invention represente sur la figure 1 comporte un corps 1 sensiblement cylindrique d'axe longitudinal X comprenant un moyen de positionnement et un moyen d'alimentation en agent de revetement. Le moyen de positionnement est constitue de plusieurs ailettes 2 disposees selon une s configuration annulaire dans un plan transversal a l'axe X et placees a la peripherie du corps 1. La partie arriere du dispositif porte une jupe anti-retour 3 de forme sensiblement tronconique et une spatule 4 egalement tronconique. La spatule 4 est disposee legerement en avant de la jupe 3, de maniere a laisser un espace entre la jupe 3 et la spatule 4 par loquel s'effectue ['expulsion de ['agent de o revetement. L'extremite externe de la jupe 3 se termine par une partie plane 5 dont la surface est parallele a l'axe X a une distance quasiment egale au rayon de la cavite tubulaire, de telle sorte que la jupe 3 dirige ['agent de revetement vers la spatu le 4 qui l'eta le su r la paroi. L'extremite externe de la spatule 4 se termine pa r un angle vif 6 qui fait un angle a d'environ 15 avec l'axe X. ts L'extremite du dispositif est fermee par un couvercle 7. II est possible de menager un logement derriere le couvercle 7, qui est alors transparent, afin de proteger un moyen de visualisation du travail accompli, par exemple une camera, associe a un moyen d'eclairage de l'interieur de la cavite. Le moyen de deplacement du dispositif est ici un moyen de traction, dans le cas present un systeme utilisant des cordes. Mais on pourrait tout aussi bien utiliser un moyen pneumatique pour permettre un deplacement du dispositif. La longueur totale du The device according to the invention represented in FIG. 1 comprises a body 1 substantially cylindrical with a longitudinal axis X comprising a positioning means and a means of supplying coating agent. The positioning means is constituted by several fins 2 arranged in an annular configuration in a plane transverse to the axis X and placed at the periphery of the body 1. The rear part of the device carries a non-return skirt 3 of substantially frustoconical shape and a spatula 4 also frustoconical. The spatula 4 is arranged slightly in front of the skirt 3, so as to leave a space between the skirt 3 and the spatula 4 whereby the expulsion of the coating agent takes place. The outer end of the skirt 3 ends in a flat part 5, the surface of which is parallel to the axis X at a distance almost equal to the radius of the tubular cavity, so that the skirt 3 directs the coating agent towards the spatu on 4 which was placed on the wall. The outer end of the spatula 4 ends at a sharp angle 6 which makes an angle α of about 15 with the axis X. ts The end of the device is closed by a cover 7. It is possible to arrange a housing behind the cover 7, which is then transparent, in order to protect a means of viewing the work accomplished, for example a camera, associated with a means of lighting the interior of the cavity. The means of displacement of the device is here a means of traction, in the present case a system using ropes. But we could just as well use a pneumatic means to allow movement of the device. The total length of the
dispositif represente sur la figure 1 est comprise entre 200mm et 250mm. device shown in Figure 1 is between 200mm and 250mm.
A l'interieur du corps 1 du dispositif de la figure 1, la coupe longitudinale de la figure 2 permet de voir le moyen d'alimentation en agent de revetement. Ce moyen comprend une premiere entree 20 centrale par laquelle est approvisionnee une resine reticulable, par exemple une resine "CRESTOMER", et une seconde entree 21 laterale par laquelle arrive ['agent de reticulation ou durcisseur. Le flux d'agent de reticulation qui penetre dans le corps 1 par lientree 21 est dirige au centre d'un conduit 22, communiquant avec ['entree 20, de maniere a se meler rapidement au flux de resine reticulable empruntant ce conduit 22. L'ensemble resine + durcisseur est alors envoye dans un melangeur 23 afin d'homogeneiser le melange. Le melangeur23 comprend quatre sorties 24 par lesquelles le melange est dirige vers un reservoir commun 25. Ce reservoir 25 communique par quatre tubulures avec ['orifice 26 d'expulsion de ['agent de revetement Inside the body 1 of the device of FIG. 1, the longitudinal section of FIG. 2 allows the means of supply of coating agent to be seen. This means comprises a first central entry 20 through which a crosslinkable resin is supplied, for example a "CRESTOMER" resin, and a second lateral entry 21 via which the crosslinking agent or hardener arrives. The flow of crosslinking agent which penetrates into the body 1 by means of the link 21 is directed at the center of a conduit 22, communicating with the entry 20, so as to rapidly mix with the flow of crosslinkable resin passing through this conduit 22. the resin + hardener assembly is then sent to a mixer 23 in order to homogenize the mixture. The mixer 23 comprises four outlets 24 through which the mixture is directed to a common reservoir 25. This reservoir 25 communicates by four pipes with the orifice 26 for expelling the coating agent
3s constitue par l'espace entre la jupe 3 et la spatule 4. 3s constitutes by the space between the skirt 3 and the spatula 4.
Le dispositif selon ['invention est destine a etre utilise en particulier pour ['installation d'un element tubulaire dans une canalisation. Sur la figure 3 on volt que le dispositif 1 comporte en outre un moyen de guidage 30 pour un element tubulaire comme un cable ou un tube. Ce moyen de guidage 30 est porte par s l'extremite externe de la jupe 3. La presence de ce moyen de guidage 30 necessite une retraction de la spatule4 a cet endroit pour former une gorge. Afin de permettre un ajustement de la hauteur de la spatule 4, on utilise un materiou souple et flexible formant une poche31 dont la forme est susceptible d'etre The device according to the invention is intended to be used in particular for the installation of a tubular element in a pipeline. In Figure 3 we see that the device 1 further comprises a guide means 30 for a tubular element such as a cable or a tube. This guide means 30 is carried by s the outer end of the skirt 3. The presence of this guide means 30 requires retraction of the spatula4 at this location to form a groove. In order to allow an adjustment of the height of the spatula 4, a flexible and flexible material is used forming a pocket31 whose shape is capable of being
modifiee sous ['action d'un gaz sous pression. modified under the action of a gas under pressure.
io Le melangeur23 est visible au centre de la coupe transversale de la figure 4. A l'arriere plan, on apercoit les ailettes 2 dont l'unes d'entre elles porte un io The mixer23 is visible in the center of the cross section of Figure 4. In the background, we see the fins 2, one of which carries a
evidement 30 pour le passage de ['element tubulaire. recess 30 for the passage of the tubular element.
La coupe de la figure 5 montre au centre les quatre sorties 24 du melangeur par lesquelles ['agent de rev8tement est conduit dans le reservoir ts commun 25, puis dirige par quatre tubulures 50 vers ltorifice 26 constitue par l'espace entre la jupe 3 et la spatuie 4. A la peripherie, la coupe de la spatule 4 The section of FIG. 5 shows in the center the four outlets 24 of the mixer through which the coating agent is led into the common tank 25, then directed by four pipes 50 towards the orifice 26 formed by the space between the skirt 3 and the spatuie 4. At the periphery, the section of the spatula 4
laisse appara^tre la poche 31.reveals pocket 31.
Une variante du dispositif selon ['invention permettant un revetement de la totalite de la paroi est representee sur les figures 6 et 7 place a l'interieur d'une cavite tubulaire 60. Le corps 61 est sensiblement cylindrique et porte des ailettes 62 de positionnement. A l'arriere, on retrouve une spatule 63 et une A variant of the device according to the invention allowing a coating of the entire wall is shown in FIGS. 6 and 7 placed inside a tubular cavity 60. The body 61 is substantially cylindrical and carries fins 62 for positioning . At the back, there is a spatula 63 and a
jupe 64. Des orifices 65 de propulsion vent menages sur le corps 61 du dispositif. skirt 64. Wind propulsion orifices 65 are provided on the body 61 of the device.
Les orifices 65 permettent la sortie des jets de gaz sous pression provoquant l'avancement du dispositif selon ['invention. Un element tubulaire 66 est introduit dans la cavite60 et dispose sur le sol de cette cavite60. Simultanement ou successivement, le dispositif est amene au niveau d'une extremite de cet element tubulaire 66. L'agent de revetement est alors expulse entre la jupe 63 et la spatu le 64 cependa nt que le d ispositif enta me u n deplacement en sens inverse de sa direction d'introduction. L'agent de revetement est ainsi applique sur la totalite The orifices 65 allow the jets of pressurized gas to exit, causing the device according to the invention to advance. A tubular element 66 is introduced into the cavity60 and has this cavity60 on the ground. Simultaneously or successively, the device is brought to the level of one end of this tubular element 66. The coating agent is then expelled between the skirt 63 and the spatu the 64, however the device starts moving in the opposite direction from its introductory direction. The coating agent is thus applied to the whole
so de la paroi interne de la cavite sous la forme d'une couche 67 d'egale epaisseur. so of the internal wall of the cavity in the form of a layer 67 of equal thickness.
La figure 8 montre en perspective une autre forme de realisation du dispositif selon ['invention dans une cavite tubulaire 70. Le corps 71 est sensiblement cylindrique et porte des ailettes 72 de positionnement. A l'arriere on retrouve une spatule 73 de forme plane et une jupe 74. Un element tubulaire 75 est dispose sur le sol de la cavite 70. En se deplac, ant le dispositif applique ['agent de revetement sur lielement tubulaire 75 et de part et d'autre de celui-ci de maniere a former une couche 76 de revetement sur la surface correspondant FIG. 8 shows in perspective another embodiment of the device according to the invention in a tubular cavity 70. The body 71 is substantially cylindrical and carries fins 72 for positioning. At the rear there is a spatula 73 of planar shape and a skirt 74. A tubular element 75 is disposed on the floor of the cavity 70. While moving, ant the device applied ['coating agent on tubular element 75 and on either side of it so as to form a layer 76 of coating on the corresponding surface
seulement a un secteur angulaire du cylindre forme par la cavite 70. only has an angular sector of the cylinder formed by the cavity 70.
s Une autre forme d'execution du dispositif selon ia presente invention est represente sur la figure 9. Ce dispositif est compose de deux spheres 90 et 91 reliees entre elles par une portion rectiligne 92. Un tuyou 93 amene la resine reticulable jusqu'a la sphere 90. Un autre tuyou 94 amene i'agent de reticulation, ou durcisseur, qui est incorpore da ns la resine reticula ble au niveau de la to sphere 90. A la sphere 90 abouti egalement un moyen de deplacement 95 qui peut comprendre une corde ou une arrivee de gaz pressurise. La portion rectiligne 92 reliant les spheres 90 et 91 est constituee de tuyoux souples qui vent generalement dedoubles pour des raisons de symetrie et d'equilibrage du dispositif. A la sortie de la sphere 91 se trouve le melangeur 96 dans lequel le is melange resine + durcisseur est homogeneise pour constituer ['agent de revetement. A l'extremite du dispositif on retrouve comme precedemment une jupe 97 et une spatule 98 destinees a permettre ['application de ['agent de Another embodiment of the device according to the present invention is shown in FIG. 9. This device is composed of two spheres 90 and 91 connected together by a rectilinear portion 92. A pipe 93 brings the crosslinkable resin up to the sphere 90. Another pipe 94 brings the crosslinking agent, or hardener, which is incorporated in the crosslinked resin at the level of sphere 90. At sphere 90 also leads a means of displacement 95 which may include a cord or a pressurized gas supply. The rectilinear portion 92 connecting the spheres 90 and 91 is made up of flexible pipes which are generally split for reasons of symmetry and balancing of the device. At the exit of the sphere 91 is the mixer 96 in which the resin mixture + hardener is homogenized to constitute the coating agent. At the end of the device there is, as previously, a skirt 97 and a spatula 98 intended to allow the application of the
revetement sur la totalite de la surface interne de la paroi de la cavite tubulaire. coating on the entire internal surface of the wall of the tubular cavity.
L'invention n'est pas limitee aux modes de realisation decrits et representes The invention is not limited to the embodiments described and represented
mais est susceptible de nombreuses variantes aisement accessibles a l'homme de l'art. En particulier, on pourra sans sortir du cadre de ['invention modifier la forme but is susceptible of numerous variants easily accessible to those skilled in the art. In particular, it will be possible without departing from the scope of the invention to modify the form
des pieces qui guident le dispositif ou qui appliquent la resine. pieces that guide the device or apply the resin.
Claims (35)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0205373A FR2838986A1 (en) | 2002-04-29 | 2002-04-29 | Equipment for coating internal surface of inaccessible pipe or duct, e.g. for cable, comprises cylindrical body which has locating wings, orifices for propulsion jets, an anti return skirt and an angled spreading spatula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0205373A FR2838986A1 (en) | 2002-04-29 | 2002-04-29 | Equipment for coating internal surface of inaccessible pipe or duct, e.g. for cable, comprises cylindrical body which has locating wings, orifices for propulsion jets, an anti return skirt and an angled spreading spatula |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2838986A1 true FR2838986A1 (en) | 2003-10-31 |
Family
ID=28800023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0205373A Pending FR2838986A1 (en) | 2002-04-29 | 2002-04-29 | Equipment for coating internal surface of inaccessible pipe or duct, e.g. for cable, comprises cylindrical body which has locating wings, orifices for propulsion jets, an anti return skirt and an angled spreading spatula |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2838986A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1152570A (en) * | 1967-06-28 | 1969-05-21 | Pipe Linings Inc | A Spreader for a Pipelining Machine. |
| US4249485A (en) | 1978-05-31 | 1981-02-10 | Bbc Brown Boveri & Company Limited | Feed water preheater |
| GB2133497A (en) * | 1983-01-13 | 1984-07-25 | British Gas Corp | Apparatus for sealing a leak in the wall of a pipe |
| US4782786A (en) | 1985-02-13 | 1988-11-08 | Kunststoff-Technik Ag Himmler | Device to fill and glue all kinds of depressions in inaccessible pipe conduits |
| EP0605085A1 (en) * | 1992-12-29 | 1994-07-06 | SUMIYOSHI MANUFACTURING Co. Ltd. | Method and apparatus for repairing the pipe inner surface by resin coating |
| DE19826880A1 (en) | 1998-06-17 | 1999-12-23 | Alcatel Sa | Optical or electrical cable fixing device e.g. securing information cable to inside wall of drainage pipe |
-
2002
- 2002-04-29 FR FR0205373A patent/FR2838986A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1152570A (en) * | 1967-06-28 | 1969-05-21 | Pipe Linings Inc | A Spreader for a Pipelining Machine. |
| US4249485A (en) | 1978-05-31 | 1981-02-10 | Bbc Brown Boveri & Company Limited | Feed water preheater |
| GB2133497A (en) * | 1983-01-13 | 1984-07-25 | British Gas Corp | Apparatus for sealing a leak in the wall of a pipe |
| US4782786A (en) | 1985-02-13 | 1988-11-08 | Kunststoff-Technik Ag Himmler | Device to fill and glue all kinds of depressions in inaccessible pipe conduits |
| EP0605085A1 (en) * | 1992-12-29 | 1994-07-06 | SUMIYOSHI MANUFACTURING Co. Ltd. | Method and apparatus for repairing the pipe inner surface by resin coating |
| DE19826880A1 (en) | 1998-06-17 | 1999-12-23 | Alcatel Sa | Optical or electrical cable fixing device e.g. securing information cable to inside wall of drainage pipe |
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