EP0238363B1 - Method for installing mechanical sealing elements of a pump with a concrete housing in this housing - Google Patents

Method for installing mechanical sealing elements of a pump with a concrete housing in this housing Download PDF

Info

Publication number
EP0238363B1
EP0238363B1 EP87400016A EP87400016A EP0238363B1 EP 0238363 B1 EP0238363 B1 EP 0238363B1 EP 87400016 A EP87400016 A EP 87400016A EP 87400016 A EP87400016 A EP 87400016A EP 0238363 B1 EP0238363 B1 EP 0238363B1
Authority
EP
European Patent Office
Prior art keywords
rings
dummy
ring
volute
cover
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.)
Expired - Lifetime
Application number
EP87400016A
Other languages
German (de)
French (fr)
Other versions
EP0238363A1 (en
Inventor
Jean-Pierre Daux
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.)
BERGERON-RATEAU
Original Assignee
BERGERON-RATEAU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BERGERON-RATEAU filed Critical BERGERON-RATEAU
Publication of EP0238363A1 publication Critical patent/EP0238363A1/en
Application granted granted Critical
Publication of EP0238363B1 publication Critical patent/EP0238363B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
    • F04D29/606—Mounting in cavities

Definitions

  • the present invention relates to a method for producing the interfaces between the concrete elements and the mechanical elements of a concrete scroll pump, said pump comprising a concrete scroll having an axial suction orifice in its lower part and, in its upper part, a well which is roughly coaxial with the suction orifice, two metal crowns, respectively lower and upper, which are sealed coaxially to each other in reservations respectively provided in the concrete of the suction port and well, a sealing ring, which is detachably attached to the lower crown, a metal cover which is detachably attached at its periphery to the upper crown, a vertical shaft which is axially supported and rotatably mounted in the cover, and a wheel which is fixed to the lower end of the shaft and a part of which is located opposite the has a sealing ring and has a small clearance with respect thereto.
  • volute pumps of common dimensions the volute is generally metallic and most often produced by molding. However, beyond a certain dimension, it may be more economical to make the concrete scroll, either from formwork, for example of wood, the external shape of which corresponds to the internal shape of the spiral duct of the volute, or from precast concrete elements, which are assembled on the site where the pump is to be installed, and which, once assembled, form the volute. In both cases, concrete is poured around the forms or prefabricated elements to form the infrastructure of the pumping station (while simultaneously forming the volute in the case where forms are used).
  • the sealing ring and the cover are supported directly by the lower ring and by the upper ring, respectively. Consequently, in addition to the fact that the two crowns must be precisely positioned (with a tolerance of 1 mm or less), they must also be machined so as to present surfaces having an appropriate shape and a surface condition suitable for receiving the sealing ring and the pump cover, respectively. These machining operations are relatively complicated and expensive since the machining tolerances are, again, about 1 mm or less and these two crowns are relatively bulky parts. In fact, their diameters are a function, for the lower ring, of the suction diameter of the pump wheel and, for the upper ring, of the outside diameter of said wheel. As an indication, these diameters commonly vary between 1.5 m and 4 m.
  • the object of the present invention is therefore to provide a method which allows the positioning of the lower and upper crowns at once and simultaneously, and the production of mechanical support surfaces capable of receiving the removable elements of the pump (ring sealing and cover), without the need to call in specialists other than mechanics and without the need to use precision machined crowns.
  • the method of the present invention is characterized in that it consists, for the sealing of the two upper and lower crowns, of placing the two crowns simultaneously in the respective reservations, of embedding each of said crowns in a curable resinous material , while molding said resinous material using a single mold having two molding surfaces, respectively lower and upper, which are coaxial and axially spaced from each other by a predetermined distance corresponding to the vertical distance between the periphery of the cover and the sealing ring, so as to form, after the setting of the resinous material, two annular blocks of resin, respectively lower and upper, reinforced by said crowns and having molded surfaces corresponding to the molding surfaces of the mold, and to use said molded surfaces as support surfaces respectively for the sealing ring and for the cover.
  • the pump essentially comprises a concrete scroll 1, comprising an axial suction port 2 and a well 3 which is roughly coaxial with the suction port 2; a lower metal crown 4 and an upper metal crown 5, which are sealed in reservations 6 and 7 provided in the concrete walls of the suction orifice 2 and of the well 3, respectively; a sealing ring 8 made of metal, for example bronze, or plastic, which is detachably fixed to the crown 4; a metal cover 9, also called a pump body bottom, which is fixed in a removable manner to the crown 5; a shaft 11, which is axially supported and rotatably mounted in the cover 9 by means of bearings 12 and 13; and a wheel 14, which is fixed to the lower end of the shaft 11 and the lower part 14a of which is situated opposite the sealing ring 8 and has a small clearance (approximately 1 mm) relative to it. this.
  • FIG 2 shows a mannequin 15 which can be used for positioning and sealing the two crowns 4 and 5 respectively in the reservations 6 and 7.
  • the mannequin 15 comprises a cylindrical barrel 1 5a, at the ends of which are fixed, for example by welding , annular flanges 15b and 15c.
  • the underside of the flange 1 5b is machined so as to form a molding surface 15d (FIGS. 3 and 4) which is plane and perpendicular to the longitudinal axis 16 of the dummy 1 5.
  • a cylindrical skirt 15e having a diameter smaller than the outside diameter of the flange 1 5b is welded to the underside of said flange concentrically with the axis 16.
  • the underside of the flange 15c is machined so as to form a molding surface 15f ( Figures 5 and 6) which is planar and perpendicular to the axis 16.
  • the surface 15f may be part of a ring 15g welded to the periphery of the flange 15c.
  • the two molding surfaces 15d and 15f are coaxial with the axis 16 and axially spaced from each other by a predetermined distance corresponding to the vertical distance between the cover 9 and the sealing ring 8.
  • the crown 5 of the pump is detachably fixed to the flange 15b by several drawing screws 17 like that shown in FIG. 3, which pass freely through the holes 18 of the flange 15b and which are screwed into tapped holes 19 of the crown 5.
  • the axes of the holes 18 are located on a circle centered on the axis 16 of the dummy 15.
  • a spacing e 1 is maintained between the crown 5 and the flange 15b by means of a few screws pushers 21, for example three pushing screws, such as that shown in FIG. 4, which are screwed into tapped holes 22 of the flange 15b and which bear on the upper face of the crown 5.
  • Sealing rings 23, for example rubber, are arranged around each of the screws 17 and 21. By choosing rings 23 having sufficient rigidity in the axial direction, the rings 23 could also serve as spacing rings between the crown 5 and the flange 15b and D In this case, the pushing screws 21 could be dispensed with.
  • the crown 4 of the pump is detachably fixed to the outer crown 15g of the flange 15c by means of several drawing screws 24 like that shown in FIG. 5, which pass freely through holes 25 in the crown 15g and which are screwed into tapped holes 26 of the crown 4.
  • the axes of the holes 25 are located on a circle centered on the axis 16 of the dummy 15.
  • a spacing e 2 is maintained between the crown 4 and the crown 1 5g by a few pushing screws 27 like that shown in Figure 6 and / or by sealing and spacing rings 28 disposed around each of the screws 24 and 27 ( Figures 5 and 6).
  • the dummy 15 is introduced from top to bottom through the well 3 of the volute 1, until the crowns 4 and 5 are respectively at the level of the reservations 6 and 7 provided respectively in the wall of the suction orifice 2 and in the wall of the well 3, as shown in FIG. 7.
  • the mannequin 15 is arranged in such a way that its axis 16 coincides with the axis of the suction orifice 2 and in such a way that the anchor rods 29 of the crown 5 are in position in their reservation holes 31 (FIG. 7, detail A and FIG. 8).
  • the mannequin 15 is supported on the annular shoulder 7a of the reservation 7 by means of screw jacks 32 like that shown in FIG. 9, for example three screw jacks spaced 120 ° at the periphery of the flange 15b.
  • screw jacks 32 like that shown in FIG. 9, for example three screw jacks spaced 120 ° at the periphery of the flange 15b.
  • the mannequin 15 is then adjusted in height and level by means of the screw jacks 32.
  • a sealing bead 33 (FIGS. 8 and 9) is placed between the lower end of the skirt 15e and the shoulder 7a of the reservation. 7.
  • the skirt 15e could be made of rubber or its lower edge could be provided beforehand with a rubber sealing joint.
  • a resin mortar 34 is poured into the holes 31 and into the resevation 7 to a level 1 (FIG. 10), such that the crown 5 is at least partially embedded in the resin mortar.
  • the skirt 15e and the bead 33 prevent the resin mortar from flowing into the well 3.
  • Resin mortar 34 is also poured into the reservation 6 to a level l (FIG. 11) such that the crown 4 is at least partially embedded in the resin mortar.
  • a hardening resin 36 is poured into the reservation 7 up to a level II (FIG. 10) and into the reservation 6 up to a level II ′ (FIG. 11) such as the crowns 4 and 5 are completely submerged and two annular blocks of resin are obtained, the upper surface of which is molded by the molding surfaces 15d and 15f, previously coated with an anti-adhesive agent.
  • the resin 36 has hardened, the screws 17 and 24 and the nuts of the anchor rods 29 are removed.
  • the resin 36 is chosen so as to have a high hardness and a good surface condition after demolding, that is to say after removal of the dummy 15.
  • the resin 36 can for example be a "Chockfast Orange” resin manufactured by the Philidelphia Resins Co. Company.
  • the resin mortar can be, for example, a "Chockfast Blue” or “Chockfast Red” resin mortar manufactured by the same company.
  • two annular blocks are therefore obtained, the molded upper surfaces 37 and 38 (FIG. 12) are perfectly coaxial and axially spaced from each other by a predetermined distance corresponding to the vertical distance between the cover 9 and the sealing ring 8 of the pump.
  • the sealing ring 8 is then placed on the molded surface 38 of the resin block 36, the holes 39 of the ring 8 are aligned with the tapped holes 26 of the crown 4 and the ring 8 is fixed to the crown 4 by screw 41 as shown in Figure 14.
  • the assembly 9-14 is introduced in one piece or in several parts from top to bottom through the well 3 of the volute 1.
  • the cover 9 has in its peripheral region 9a holes 42 whose number corresponds to the total number of tapped holes 19 and anchor rods 29 of the crown 5.
  • the holes 42 are aligned with the tie rods anchor 29 and with the tapped holes 19 of the crown 5, then the threaded parts of the anchor rods 29 are engaged through the corresponding holes 42 and the cover 9 is placed on the molded surface 37.
  • the cover 9 is fixed to crown 5 by means of screws 43 which are screwed s in the tapped holes 19 and by means of nuts which are screwed onto the anchor rods 29.
  • the sealing ring 8 was in the form of a flat ring.
  • the sealing ring is cylindrical and concentrically surrounds, with a small radial clearance, the lower part 14a of the impeller 14 of the pump.
  • the lower part of the mannequin 15 can be modified as shown in FIG. 15.
  • a cylindrical crown 15h which is coaxial with the axis 16 of the mannequin 15 (FIG. 2) and which has an outside diameter equal to the outside diameter of the sealing ring.
  • the outer cylindrical surface of the crown 15h forms the molding surface 15f.
  • the crown 15h is extended downwards by a cylindrical skirt 15i, which has an outside diameter slightly smaller than the inside diameter of the suction orifice 2 of the volute.
  • the crown 4 ′ of the pump also has a cylindrical shape and is detachably fixed to the crown 1 5 h of the mannequin by drawing screws like that shown at 44 in FIG. 15, which are screwed into tapped holes 45 of the crown 4 '.
  • a spacing e 3 is maintained between the crown 4 ′ and the crown 1 5 h by pushing screws like that shown at 46 in FIG. 15, for example by three pushing screws spaced angularly by 120 °.
  • Sealing rings 47 are arranged around each of the screws 44 and 46. The rings 47 arranged around the screws 44 can also serve as spacing rings, in which case the pushing screws 46 can be omitted.
  • a sealing bead 48 is placed between the cylindrical skirt 15i and the suction orifice 2 as shown in FIG. 16
  • a resin 36 for example the "Chockfast Orange” resin already mentioned above, is poured into the reservation 6 in order to completely drown the crown 4 '.
  • the upper crown 5 of the pump is sealed in the manner previously described.
  • the screws 44 and 46 are removed and the dummy 15 is extracted from bottom to top through the well 3 of the volute as in the embodiment previously described.
  • a cylindrical molded surface 38 ' is obtained (FIG. 17) capable of receiving the cylindrical sealing ring 8'.
  • the latter has holes 49 which are aligned with the tapped holes 45 of the ring 4 ', and in which screws 51 are engaged to fix the sealing ring 8' to the ring 4 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

La présente invention concerne un procédé pour la réalisation des interfaces entre les éléments en béton et les éléments mécaniques d'une pompe à volute en béton, ladite pompe comprenant une volute en béton ayant un orifice axial d'aspiration dans sa partie inférieure et, dans sa partie supérieure, un puits qui est en gros coaxial à l'orifice d'aspiration, deux couronnes métalliques, respectivement inférieure et supérieure, qui sont scellées coaxialement l'une à l'autre dans des réservations respectivement prévues dans le béton de l'orifice d'apsiration et du puits, une bague d'étanchéité, qui est fixée de manière détachable à la couronne inférieure, un couvercle métallique qui est fixé de manière détachable à sa périphérie à la couronne supérieure, un arbe vertical qui est supporté axialement et monté à rotation dans le couvercle, et une roue qui est fixée à l'extrémité inférieure de l'arbre et dont une partie est située en regard de la bague d'étanchéité et présente un faible jeu par rapport à celle-ci.The present invention relates to a method for producing the interfaces between the concrete elements and the mechanical elements of a concrete scroll pump, said pump comprising a concrete scroll having an axial suction orifice in its lower part and, in its upper part, a well which is roughly coaxial with the suction orifice, two metal crowns, respectively lower and upper, which are sealed coaxially to each other in reservations respectively provided in the concrete of the suction port and well, a sealing ring, which is detachably attached to the lower crown, a metal cover which is detachably attached at its periphery to the upper crown, a vertical shaft which is axially supported and rotatably mounted in the cover, and a wheel which is fixed to the lower end of the shaft and a part of which is located opposite the has a sealing ring and has a small clearance with respect thereto.

Dans les pompes à volute de dimensions courantes, la volute est en général métallique et le plus souvent réalisée par moulage. Toutefois, au-delà d'une certaine dimension, il peut être plus économique d'exécuter la volute en béton, soit à partir de coffrages, par exemple en bois, dont la forme extérieure correspond à la forme intérieure du conduit en spirale de la volute, soit à partir d'éléments préfabriqués en béton, qui sont assemblés sur le site où la pompe doit être installée, et qui, une fois assemblés, forment la volute. Dans les deux cas, du béton est coulé autour des coffrages ou des éléments préfabriqués pour former l'infrastructure de la station de pompage (tout en formant simultanément la volute dans le cas où on utilise des coffrages).In volute pumps of common dimensions, the volute is generally metallic and most often produced by molding. However, beyond a certain dimension, it may be more economical to make the concrete scroll, either from formwork, for example of wood, the external shape of which corresponds to the internal shape of the spiral duct of the volute, or from precast concrete elements, which are assembled on the site where the pump is to be installed, and which, once assembled, form the volute. In both cases, concrete is poured around the forms or prefabricated elements to form the infrastructure of the pumping station (while simultaneously forming the volute in the case where forms are used).

Or, en génie civil, les tolérances de fabrication et de positionnement sont aux mieux de plus ou moins 1cm. Ces tolérances sont incompatibles avec les tolérances de positionnement des éléments mécaniques de la pompe, en particulier avec les tolérances de positionnement du rotor de la pompe par rapport à son stator. Par exemple, le jeu entre la bague d'étanchéité et la partie de la roue qui est située en regard de ladite bague d'étanchéité doit être de l'ordre de 1mm. Il n'est donc pas possible de fixer la bague d'étanchéité et le couvercle de la pompe, qui supporte l'arbe et la roue, directment au béton, respectivement dans l'orifice d'aspiration et dans le puits de la volute. C'est pourquoi, dans les pompes connues à volute en béton, la bague d'étanchéité et le couvercle sont fixés respectivement à une couronne métallique inférieure et à une couronne métallique supérieure qui doivent être scellées dans des positions très précises respectivement dans l'orifice d'aspiration et dans le puits de la volute, les deux couronnes inférieure et supérieure formant les interfaces entre la volute en béton et les éléments mécaniques de la pompe. Pour cela, dans une première phase, la couronne inférieure est tout d'abord positionnée par rapport à l'axe de l'orifice d'aspiration de la volute, puis elle est calée approximativement en hauteur et en niveau (horizontalité). Dans cette position, des tirants d'ancrage de la couronne inférieure sont scellés définitivement dans le béton. Dans une seconde phase, en utilisant comme mannequin le couvercle et le rotor de la pompe, il est procédé successivement au calage puis au réglage définitif de la couronne inférieure par rapport à l'axe géométrique de la pompe, d'une part, et de la couronne supérieure par rapport à la couronne inférieure, d'autre part. Dans une troisième phase, les couronnes inférieure et supérieure sont scellées définitivement dans le béton. Ces opérations successives de réglage et de scellement des deux couronnes nécessitent l'exécution de travaux de maçonnerie qui sont également effectués par étapes, à savoir:

  • - scellement des tirants d'ancrage de la couronne inférieure;
  • - scellement définitif de la couronne inférieure et ragréage avec la paroi interne de l'orifice d'aspiration de la volute;
  • - scellement définitif de la couronne supérieure et ragréage avec la paroi interne du puits de la volute.
However, in civil engineering, manufacturing and positioning tolerances are at best plus or minus 1cm. These tolerances are incompatible with the positioning tolerances of the mechanical elements of the pump, in particular with the positioning tolerances of the pump rotor relative to its stator. For example, the clearance between the sealing ring and the part of the wheel which is situated opposite said sealing ring must be of the order of 1 mm. It is therefore not possible to fix the sealing ring and the cover of the pump, which supports the shaft and the impeller, directly to the concrete, respectively in the suction opening and in the volute well. This is why, in known concrete scroll pumps, the sealing ring and the cover are fixed respectively to a lower metal crown and to an upper metal crown which must be sealed in very precise positions respectively in the orifice. suction and in the volute well, the two upper and lower rings forming the interfaces between the concrete volute and the mechanical elements of the pump. For this, in a first phase, the lower crown is first of all positioned relative to the axis of the suction opening of the volute, then it is approximately fixed in height and level (horizontality). In this position, tie rods of the lower crown are permanently sealed in the concrete. In a second phase, using the cover and the rotor of the pump as a dummy, the setting is carried out successively then the final adjustment of the lower crown relative to the geometric axis of the pump, on the one hand, and the upper crown relative to the lower crown, on the other hand. In a third phase, the upper and lower crowns are permanently sealed in the concrete. These successive operations of adjusting and sealing the two crowns require the execution of masonry work which is also carried out in stages, namely:
  • - sealing of the anchors of the lower crown;
  • - final sealing of the lower crown and leveling with the internal wall of the suction opening of the volute;
  • - final sealing of the upper crown and leveling with the internal wall of the volute well.

Ces interventions successives pour des travaux de natures différentes (maçonnerie et réglages mécaniques) ont pour inconvénient de faire intervenir à plusieurs reprises et de façon alternée des corps de métiers différents.These successive interventions for work of different natures (masonry and mechanical adjustments) have the disadvantage of involving several trades in different trades alternately.

En outre, dans les pompes connues à volute en béton, la bague d'étanchéité et le couvercle sont supportés directement par la couronne inférieure et par la couronne supérieure, respectivement. En conséquence, outre le fait que les deux couronnes doivent être positionnées de manière précise (avec une tolérance de 1 mm ou moins), elles doivent être aussi usinées de manière à présenter des surfaces ayant une forme appropriée et un état de surface approprié pour recevoir la bague d'étanchéité et le couvercle de la pompe, respectivement. Ces opérations d'usinage sont relativement compliquées et coûteuses étant donné que les tolérances d'usinage sont, là encore, d'environ 1 mm ou moins et que ces deux couronnes sont des pièces relativement volumineuses. En effet, leurs diamètres sont fonction, pour la couronne inférieure, du diamètre d'aspiration de la roue de la pompe et, pour la couronne supérieure, du diamètre extérieur de ladite roue. A titre indicatif, ces diamètres varient couramment entre 1,5 m et 4 m.In addition, in known concrete scroll pumps, the sealing ring and the cover are supported directly by the lower ring and by the upper ring, respectively. Consequently, in addition to the fact that the two crowns must be precisely positioned (with a tolerance of 1 mm or less), they must also be machined so as to present surfaces having an appropriate shape and a surface condition suitable for receiving the sealing ring and the pump cover, respectively. These machining operations are relatively complicated and expensive since the machining tolerances are, again, about 1 mm or less and these two crowns are relatively bulky parts. In fact, their diameters are a function, for the lower ring, of the suction diameter of the pump wheel and, for the upper ring, of the outside diameter of said wheel. As an indication, these diameters commonly vary between 1.5 m and 4 m.

La présente invention a donc pour but de fournir un procédé permettant en une seule fois et de façon simultanée la mise en place des couronnes inférieure et supérieure et la réalisation de surfaces mécaniques de support apte à recevoir les éléments amovibles de la pompe (bague d'étanchéité et couvercle), sans qu'il soit nécessaire de faire appel à d'autres spécialistes que des mécaniciens et sans qu'il soit nécessaire d'utiliser des couronnes usinées de manière précise.The object of the present invention is therefore to provide a method which allows the positioning of the lower and upper crowns at once and simultaneously, and the production of mechanical support surfaces capable of receiving the removable elements of the pump (ring sealing and cover), without the need to call in specialists other than mechanics and without the need to use precision machined crowns.

A cet effet, le procédé de la présente invention est caractérisé en ce qu'il consiste, pour le scellement des deux couronnes inférieure et supérieure, à placer simultanément les deux couronnes dans les réservations respectives, à noyer chacune desdites couronnes dans une matière résineuse durcissable, tout en moulant ladite matière résineuse à l'aide d'un moule unique ayant deux surfaces de moulage, respectivement inférieure et supérieure, qui sont coaxiales et espacées axialement l'une de l'autre d'une distance prédéterminée correspondant à la distance verticale entre la périphérie du couvercle et la bague d'étanchéité, de manière à former, après la prise de la matière résineuse, deux blocs annulaires de résine, respectivement inférieur et supérieur, renforçés par lesdites couronnes et ayant des surfaces moulées correspondant aux surfaces de moulage du moule, et à utiliser lesdites surfaces moulées comme surfaces de support respectivement pour la bague d'étanchéité et pour le couvercle.To this end, the method of the present invention is characterized in that it consists, for the sealing of the two upper and lower crowns, of placing the two crowns simultaneously in the respective reservations, of embedding each of said crowns in a curable resinous material , while molding said resinous material using a single mold having two molding surfaces, respectively lower and upper, which are coaxial and axially spaced from each other by a predetermined distance corresponding to the vertical distance between the periphery of the cover and the sealing ring, so as to form, after the setting of the resinous material, two annular blocks of resin, respectively lower and upper, reinforced by said crowns and having molded surfaces corresponding to the molding surfaces of the mold, and to use said molded surfaces as support surfaces respectively for the sealing ring and for the cover.

D'autres caractéristiques et avantages de la présente invention ressortiront mieux au cours de la description qui va suivre, donnée en référence aux dessins annexés sur lesquels:

  • La figure 1 est une vue en coupe verticale d'une pompe à volute en béton.
  • La figure 2 est une vue en coupe verticale d'un mannequin utilisable pour la mise en oeuvre du procédé de l'invention.
  • Les figures 3 à 6 sont des vues montrant, à plus grande échelle, les détails A, B, C et D, respectivement, de la figure 2.
  • La figure 7 est une vue en coupe verticale montrant le mannequin de la figure 2 installé dans la volute de la pompe.
  • Les figures 8 et 9 sont des vues montrant, à plus grande échelle, les détails A et B, respectivement, de la figure 7.
  • Les figures 10 et 11 montrent, à plus grande échelle, les détails B et C, respectivement, de la figure 7, et elles illustrent la phase de scellement des couronnes supérieure et inférieure, respectivement, de la pompe.
  • La figure 12 est une vue semblable à la figure 7, après scellement des couronnes supérieure et inférieure de la pompe et après enlèvement du mannequin.
  • Les figures 13 et 14 montrent, à plus grande échelle, les détails B et C, respectivement, de la figure 12, après fixation du couvercle et de la bague d'étanchéité respectivement à la couronne supérieure et à la couronne inférieure de la pompe.
  • Les figures 15 et 16 montrent, à une échelle plus grande que celle de la figure 2, une autre forme de la partie inférieure du mannequin qui est utilisé pour la mise en oeuvre du procédé de la présente invention quand la bague d'étanchéité de la pompe a une forme cylindrique.
  • La figure 17 est une vue semblable aux figures 15 et 16, montrant la bague cylindrique d'étanchéité fixée à la couronne inférieure de la pompe.
Other characteristics and advantages of the present invention will emerge more clearly during the description which follows, given with reference to the appended drawings in which:
  • Figure 1 is a vertical sectional view of a concrete scroll pump.
  • Figure 2 is a vertical sectional view of a mannequin usable for the implementation of the method of the invention.
  • Figures 3 to 6 are views showing, on a larger scale, the details A, B, C and D, respectively, of Figure 2.
  • Figure 7 is a vertical sectional view showing the dummy of Figure 2 installed in the volute of the pump.
  • Figures 8 and 9 are views showing, on a larger scale, the details A and B, respectively, of Figure 7.
  • Figures 10 and 11 show, on a larger scale, the details B and C, respectively, of Figure 7, and they illustrate the sealing phase of the upper and lower rings, respectively, of the pump.
  • Figure 12 is a view similar to Figure 7, after sealing of the upper and lower rings of the pump and after removal of the dummy.
  • Figures 13 and 14 show, on a larger scale, the details B and C, respectively, of Figure 12, after fixing the cover and the sealing ring respectively to the upper ring and to the lower ring of the pump.
  • Figures 15 and 16 show, on a larger scale than that of Figure 2, another form of the lower part of the dummy which is used for the implementation of the method of the present invention when the sealing ring of the pump has a cylindrical shape.
  • Figure 17 is a view similar to Figures 15 and 16 showing the cylindrical sealing ring fixed to the lower ring of the pump.

Comme montré dans la figure 1, la pompe comprend essentiellement une volute 1 en béton, comportant un orifice axial d'aspiration 2 et un puits 3 qui est en gros coaxial à l'orifice d'aspiration 2; une couronne métallique inférieure 4 et une couronne métallique supérieure 5, qui sont scellées dans des réservations 6 et 7 prévues dans les parois en béton de l'orifice d'aspiration 2 et du puits 3, respectivement; une bague d'étanchéité 8 en métal, par exemple en bronze, ou en matière plastique, qui est fixée de manière détachable à la couronne 4; un couvercle métallique 9, encore appelé un fond de corps de pompe, qui est fixé de manière d'étachable à la couronne 5; un arbre 11, qui est supporté axialement et monté à rotation dans le couvercle 9 par l'intermédiaire de paliers 12 et 13; et une roue 14, qui est fixée à l'extrémité inférieure de l'arbre 11 et dont la partie inférieure 14a est située en regard de la bague d'étanchéité 8 et présente un faible jeu (environ 1 mm) par rapport à celle-ci.As shown in FIG. 1, the pump essentially comprises a concrete scroll 1, comprising an axial suction port 2 and a well 3 which is roughly coaxial with the suction port 2; a lower metal crown 4 and an upper metal crown 5, which are sealed in reservations 6 and 7 provided in the concrete walls of the suction orifice 2 and of the well 3, respectively; a sealing ring 8 made of metal, for example bronze, or plastic, which is detachably fixed to the crown 4; a metal cover 9, also called a pump body bottom, which is fixed in a removable manner to the crown 5; a shaft 11, which is axially supported and rotatably mounted in the cover 9 by means of bearings 12 and 13; and a wheel 14, which is fixed to the lower end of the shaft 11 and the lower part 14a of which is situated opposite the sealing ring 8 and has a small clearance (approximately 1 mm) relative to it. this.

La figure 2 montre un mannequin 15 pouvant être utilisé pour le positionnement et le scellement des deux couronnes 4 et 5 respectivement dans les réservations 6 et 7. Le mannequin 15 comporte un fût cylindrique 1 5a, aux extrémités duquel sont fixées, par exemple par soudage, des brides annulaires 15b et 15c. Dans sa région périphérique extérieure, la face inférieure de la bride 1 5b est usinée de manière à former une surface de moulage 15d (figures 3 et 4) qui est plane et perpendiculaire à l'axe longitudinal 16 du mannequin 1 5. En outre, comme montré dans les figures 3 et 4, une jupe cylindrique 15e, ayant un diamètre plus petit que le diamètre extérieur de la bride 1 5b est soudée à la face inférieure de ladite bride concentriquement à l'axe 16.Figure 2 shows a mannequin 15 which can be used for positioning and sealing the two crowns 4 and 5 respectively in the reservations 6 and 7. The mannequin 15 comprises a cylindrical barrel 1 5a, at the ends of which are fixed, for example by welding , annular flanges 15b and 15c. In its outer peripheral region, the underside of the flange 1 5b is machined so as to form a molding surface 15d (FIGS. 3 and 4) which is plane and perpendicular to the longitudinal axis 16 of the dummy 1 5. In addition, as shown in FIGS. 3 and 4, a cylindrical skirt 15e, having a diameter smaller than the outside diameter of the flange 1 5b is welded to the underside of said flange concentrically with the axis 16.

De même, dans sa région périphérique extérieure, la face inférieure de la bride 15c est usinée de manière à former une surface de moulage 15f (figures 5 et 6) qui est plane et perpendiculaire à l'axe 16. Comme montré dans les figures 5 et 6, la surface 15f peut faire partie d'une couronne 15g soudée à la périphérie de la bride 15c. Les deux surfaces de moulage 15d et 15f sont coaxiales à l'axe 16 et espacées axialement l'une de l'autre d'une distance prédéterminée correspondant à la distance verticale entre le couvercle 9 et la bague d'étanchéité 8.Similarly, in its outer peripheral region, the underside of the flange 15c is machined so as to form a molding surface 15f (Figures 5 and 6) which is planar and perpendicular to the axis 16. As shown in Figures 5 and 6, the surface 15f may be part of a ring 15g welded to the periphery of the flange 15c. The two molding surfaces 15d and 15f are coaxial with the axis 16 and axially spaced from each other by a predetermined distance corresponding to the vertical distance between the cover 9 and the sealing ring 8.

La couronne 5 de la pompe est fixée de manière détachable à la bride 15b par plusieurs vis tirantes 17 comme celle montrée dans la figure 3, qui passent librement à travers des trous 18 de la bride 15b et qui sont vissées dans des trous taraudés 19 de la couronne 5. Les axes des trous 18 sont situés sur un cercle centré sur l'axe 16 du mannequin 15. Un espacement e1, de un à quelques centimètres, est maintenu entre la couronne 5 et la bride 15b au moyen de quelques vis poussantes 21, par exemple trois vis poussantes, comme celle montrée dans la figure 4, qui sont vissées dans des trous taraudés 22 de la bride 15b et qui s'appuient sur la face supérieure de la couronne 5. Des bagues d'étanchéité 23, par exemple en caoutchouc, sont disposées autour de chacune des vis 17 et 21. En choisissant des bagues 23 ayant une rigidité suffisante dans le sens axial, les bagues 23 pourraient aussi servi également de bagues d'espacement entre la couronne 5 et la bride 15b et, dans ce cas, on pourrait se passer des vis poussantes 21.The crown 5 of the pump is detachably fixed to the flange 15b by several drawing screws 17 like that shown in FIG. 3, which pass freely through the holes 18 of the flange 15b and which are screwed into tapped holes 19 of the crown 5. The axes of the holes 18 are located on a circle centered on the axis 16 of the dummy 15. A spacing e 1 , from one to a few centimeters, is maintained between the crown 5 and the flange 15b by means of a few screws pushers 21, for example three pushing screws, such as that shown in FIG. 4, which are screwed into tapped holes 22 of the flange 15b and which bear on the upper face of the crown 5. Sealing rings 23, for example rubber, are arranged around each of the screws 17 and 21. By choosing rings 23 having sufficient rigidity in the axial direction, the rings 23 could also serve as spacing rings between the crown 5 and the flange 15b and D In this case, the pushing screws 21 could be dispensed with.

De même, la couronne 4 de la pompe est fixée de manière détachable à la couronne extérieure 15g de la bride 15c au moyen de plusieurs vis tirantes 24 comme celle montrée dans la figure 5, qui passent librement dans des trous 25 de la couronne 15g et qui sont vissées dans des trous taraudés 26 de la couronne 4. Les axes des trous 25 sont situés sur un cercle centré sur l'axe 16 du mannequin 15. Un espacement e2, de un à quelques centimètres, est maintenu entre la couronne 4 et la couronne 1 5g par quelques vis poussantes 27 comme celle montrée dans la figure 6 et/ou par des bagues d'étanchéité et d'espacement 28 disposées autour de chacune des vis 24 et 27 (figures 5 et 6).Likewise, the crown 4 of the pump is detachably fixed to the outer crown 15g of the flange 15c by means of several drawing screws 24 like that shown in FIG. 5, which pass freely through holes 25 in the crown 15g and which are screwed into tapped holes 26 of the crown 4. The axes of the holes 25 are located on a circle centered on the axis 16 of the dummy 15. A spacing e 2 , from one to a few centimeters, is maintained between the crown 4 and the crown 1 5g by a few pushing screws 27 like that shown in Figure 6 and / or by sealing and spacing rings 28 disposed around each of the screws 24 and 27 (Figures 5 and 6).

Après que les couronnes 4 et 5 ont été fixées respectivement aux brides 15c et 15b de la manière décrite plus haut, le mannequin 15 est introduit de haut en bas à travers le puits 3 de la volute 1, jusq'à ce que les couronnes 4 et 5 se trouvent respectivement au niveau des réservations 6 et 7 prévues respectivement dans la paroi de l'orifice d'aspiration 2 et dans la paroi du puits 3, comme montré dans la figure 7. Le mannequin 15 est disposé de telle façon que son axe 16 coïncide avec l'axe de l'orifice d'aspiration 2 et de telle façon que les tirants d'ancrage 29 de la couronne 5 soient en position dans leurs trous de réservation 31 (figure 7, détail A et figure 8). Le mannequin 15 prend appui sur l'épaulement annulaire 7a de la réservation 7 par l'intermédiaire de vérins à vis 32 comme celui montré dans la figure 9, par exemple trois vérins à vis espacés de 120° à la périphérie de la bride 15b. Comme les vis 21 et 17, les parties filetées des tirants d'ancrage 29 et des vérins à vis 32 sont protégées par des bagues d'étanchéité et/ou d'espacement 23 (figures 8 et 9). Le mannequin 15 est alors réglé en hauteur et en niveau au moyen des vérins à vis 32. Un bourrelet d'étanchéité 33 (figures 8 et 9) est posé entre l'extrémité inférieure de la jupe 15e et l'épaulement 7a de la réservation 7. Au lieu de prévoir un bourrelet d'étanchéité 33, la jupe 15e pourrait être en caoutchouc ou son bord inférieur pourrait être pourvu au préalable d'un joint d'étanchéité en caoutchouc.After the crowns 4 and 5 have been fixed respectively to the flanges 15c and 15b in the manner described above, the dummy 15 is introduced from top to bottom through the well 3 of the volute 1, until the crowns 4 and 5 are respectively at the level of the reservations 6 and 7 provided respectively in the wall of the suction orifice 2 and in the wall of the well 3, as shown in FIG. 7. The mannequin 15 is arranged in such a way that its axis 16 coincides with the axis of the suction orifice 2 and in such a way that the anchor rods 29 of the crown 5 are in position in their reservation holes 31 (FIG. 7, detail A and FIG. 8). The mannequin 15 is supported on the annular shoulder 7a of the reservation 7 by means of screw jacks 32 like that shown in FIG. 9, for example three screw jacks spaced 120 ° at the periphery of the flange 15b. Like the screws 21 and 17, the threaded parts of the anchor rods 29 and the screw jacks 32 are protected by sealing and / or spacing rings 23 (Figures 8 and 9). The mannequin 15 is then adjusted in height and level by means of the screw jacks 32. A sealing bead 33 (FIGS. 8 and 9) is placed between the lower end of the skirt 15e and the shoulder 7a of the reservation. 7. Instead of providing a sealing bead 33, the skirt 15e could be made of rubber or its lower edge could be provided beforehand with a rubber sealing joint.

Ensuite, un mortier de résine 34 est coulé dans les trous 31 et dans la résevation 7 jusqu'à un niveau 1 (figure 10), tel que la couronne 5 soit au moins partiellement noyée dans le mortier de résine. La jupe 15e et le bourrelet 33 empêchent le mortier de résine de couler dans le puits 3. Du mortier de résine 34 est également coulé dans la réservation 6 jusqu'à un niveau l' (figure 11) tel que la couronne 4 soit au moins partiellement noyée dans le mortier de résine. Un élément annulaire de retenue 35 à section en forme de L, ayant un diamètre intérieur correspondant à celui de l'orifice d'aspiration 2 et préalablement ancré sur l'épaulement annulaire 6a de la réservation 6, empêche le mortier de résine de couler dans l'orifice d'aspiration 2.Then, a resin mortar 34 is poured into the holes 31 and into the resevation 7 to a level 1 (FIG. 10), such that the crown 5 is at least partially embedded in the resin mortar. The skirt 15e and the bead 33 prevent the resin mortar from flowing into the well 3. Resin mortar 34 is also poured into the reservation 6 to a level l (FIG. 11) such that the crown 4 is at least partially embedded in the resin mortar. An annular retaining element 35 of L-shaped section, having an internal diameter corresponding to that of the suction orifice 2 and previously anchored on the annular shoulder 6a of the reservation 6, prevents the resin mortar from pouring into the suction port 2.

Après la prise du mortier de résine 34, une résine durcissable 36 est coulée dans la réservation 7 jusqu'à un niveau Il (figure 10) et dans la réservation 6 jusqu'à un niveau II' (figure 11) tels que les couronnes 4 et 5 soient complètement noyées et que l'on obtienne deux blocs annulaires de résine dont la surface supérieure est moulée par les surfaces de moulage 15d et 15f, préalablement enduites d'un agent anti-adhérent. Après durcissement de la résine 36, les vis 17 et 24 et les écrous des tirants d'ancrage 29 sont enlevés. On notera que, pendant la coulée du mortier de résine 34 et pendant la coulée de la résine 36, les vis 17, 21, 24, 27 et 32 et la partie filetée des tirants d'ancrage 29 étaient protégées contre tout contact avec le mortier de résine ou la résine, de sorte que les vis 17 et 24 peuvent être facilement dévissées pour détacher le mannequin 15 des deux couronnes 4 et 5. Le mannequin 15 peut être alors extrait de bas en haut à travers le puits 3 de la volute 1. La résine 36 est choisie de manière à présenter une grande dureté et un bon état de surface après démoulage, c'est-à-dire après enlèvement du mannequin 15. La résine 36 peut être par exemple une résine «Chockfast Orange» fabriquée par la Société Phila- delphia Resins Co. Le mortier de résine peut être par exemple un mortier de résine «Chockfast Blue» ou «Chockfast Red» fabriqué par la même Société. Après démoulage, on obtient donc deux blocs annulaires dont les surfaces supérieures moulées 37 et 38 (figure 12) sont parfaitement coaxiales et espacées axialement l'une de l'autre d'une distance prédéterminée correspondant à la distance verticale entre le couvercle 9 et la bague d'étanchéité 8 de la pompe. La bague d'étanchéité 8 est ensuite posée sur la surface moulée 38 du bloc de résine 36, les trous 39 de la bague 8 sont alignés avec les trous taraudés 26 de la couronne 4 et la bague 8 est fixée à la couronne 4 par des vis 41 comme montré dans la figure 14. Ensuite, l'ensemble 9-14 est introduit d'un seul bloc ou en plusieurs parties de haut en bas à travers le puits 3 de la volute 1. Le couvercle 9 comporte dans sa région périphérique 9a des trous 42 dont le nombre correspond au nombre total des trous taraudés 19 et des tirants d'ancrage 29 de la couronne 5. Avant que le couvercle 9 soit posé sur la surface moulée 37, les trous 42 sont alignés avec les tirants d'ancrage 29 et avec les trous taraudés 19 de la couronne 5, puis les parties filetées des tirants d'ancrage 29 sont engagées à travers les trous 42 correspondants et le couvercle 9 est posé sur la surface moulée 37. Ensuite, le couvercle 9 est fixé à la couronne 5 au moyen de vis 43 qui sont vissées dans les trous taraudés 19 et au moyen d'écrous qui sont vissées sur les tirants d'ancrage 29.After setting the resin mortar 34, a hardening resin 36 is poured into the reservation 7 up to a level II (FIG. 10) and into the reservation 6 up to a level II ′ (FIG. 11) such as the crowns 4 and 5 are completely submerged and two annular blocks of resin are obtained, the upper surface of which is molded by the molding surfaces 15d and 15f, previously coated with an anti-adhesive agent. After the resin 36 has hardened, the screws 17 and 24 and the nuts of the anchor rods 29 are removed. It will be noted that, during the pouring of the resin mortar 34 and during the pouring of the resin 36, the screws 17, 21, 24, 27 and 32 and the threaded part of the anchor rods 29 were protected against any contact with the mortar resin or the resin, so that the screws 17 and 24 can be easily unscrewed to detach the dummy 15 from the two crowns 4 and 5. The dummy 15 can then be extracted from bottom to top through the well 3 of the volute 1 The resin 36 is chosen so as to have a high hardness and a good surface condition after demolding, that is to say after removal of the dummy 15. The resin 36 can for example be a "Chockfast Orange" resin manufactured by the Philidelphia Resins Co. Company. The resin mortar can be, for example, a "Chockfast Blue" or "Chockfast Red" resin mortar manufactured by the same company. After demolding, two annular blocks are therefore obtained, the molded upper surfaces 37 and 38 (FIG. 12) are perfectly coaxial and axially spaced from each other by a predetermined distance corresponding to the vertical distance between the cover 9 and the sealing ring 8 of the pump. The sealing ring 8 is then placed on the molded surface 38 of the resin block 36, the holes 39 of the ring 8 are aligned with the tapped holes 26 of the crown 4 and the ring 8 is fixed to the crown 4 by screw 41 as shown in Figure 14. Then, the assembly 9-14 is introduced in one piece or in several parts from top to bottom through the well 3 of the volute 1. The cover 9 has in its peripheral region 9a holes 42 whose number corresponds to the total number of tapped holes 19 and anchor rods 29 of the crown 5. Before the cover 9 is placed on the molded surface 37, the holes 42 are aligned with the tie rods anchor 29 and with the tapped holes 19 of the crown 5, then the threaded parts of the anchor rods 29 are engaged through the corresponding holes 42 and the cover 9 is placed on the molded surface 37. Then the cover 9 is fixed to crown 5 by means of screws 43 which are screwed s in the tapped holes 19 and by means of nuts which are screwed onto the anchor rods 29.

D'après ce qui précède, il est clair que le positionnement et le centrage des deux couronnes 4 et 5 de la pompe sont réalisés en une opération de manière beaucoup plus simple et beaucoup plus rapide qu'auparavant grâce à l'utilisation du mannquin 15, et que les scellements des deux couronnes 4 et 5 peuvent être effectués dans le même temps, sans faire appel à des maçons, par les mécaniciens chargés d'installer les éléments mécaniques de la pompe. En outre, étant donné que la bague d'étanchéité 8 et le couvercle 9 ne sont plus supportés directement par les couronnes 4 et 5, respectivement, mais par les surfaces moulées 38 et 37, respectivement, les couronnes 4 et 5 n'ont plus besoin d'être positionnées axialement de manière rigoureuse l'une par rapport à l'autre et elles n'ont plus besoin d'être réalisées sous la forme de pièces usinées, mais elles peuvent être simplement constituées par des pièces brutes de découpage ou de moulage.From the above, it is clear that the positioning and centering of the two crowns 4 and 5 of the pump are carried out in one operation in a much simpler and much faster way than before thanks to the use of the dummy 15 , and that the seals of the two crowns 4 and 5 can be carried out at the same time, without calling on masons, by the mechanics responsible for installing the mechanical elements of the pump. Furthermore, since the sealing ring 8 and the cover 9 are no longer supported directly by the crowns 4 and 5, respectively, but by the molded surfaces 38 and 37, respectively, the crowns 4 and 5 no longer have need to be positioned axially in a rigorous manner with respect to each other and they no longer need to be produced in the form of machined parts, but they can simply consist of blank parts for cutting or molding.

Dans la description qui précède, la bague d'étanchéité 8 se présentait sous la forme d'un anneau plat. Toutefois, dans certains cas, la bague d'étanchéité est cylindrique et entoure concentriquement, avec un faible jeu radial, la partie inférieure 14a de la roue 14 de la pompe. Dans ce cas, la partie inférieure du mannequin 15 peut être modifiée comme montré sur la figure 15. A la périphérie de la bride 15c est soudée une couronne cylindrique 15h, qui est coaxiale à l'axe 16 du mannequin 15 (figure 2) et qui a un diamètre extérieur égal au diamètre extérieur de la bague d'étanchéité. La surface cylindrique extérieure de la couronne 15h forme la surface de moulage 15f. La couronne 15h est prolongée vers le bas par une jupe cylindrique 15i, qui a un diamètre extérieur légèrement plus petit que le diamètre intérieur de l'orifice d'aspiration 2 de la volute. La couronne 4' de la pompe a aussi une forme cylindrique et est fixée de manière détachable à la couronne 1 5h du mannequin par des vis tirantes comme celle montrée en 44 dans la figure 15, qui sont vissées dans des trous taraudés 45 de la couronne 4'. Un espacement e3 est maintenu entre la couronne 4' et la couronne 1 5h par des vis poussantes comme celle montrée en 46 dans la figure 15, par exemple par trois vis poussantes espacées angulairement de 120°. Des bagues d'étanchéité 47 sont disposées autour de chacune des vis 44 et 46. Les bagues 47 disposées autour des vis 44 peuvent également servir de bagues d'espacement, auquel cas les vis poussantes 46 peuvent être supprimées.In the above description, the sealing ring 8 was in the form of a flat ring. However, in certain cases, the sealing ring is cylindrical and concentrically surrounds, with a small radial clearance, the lower part 14a of the impeller 14 of the pump. In this case, the lower part of the mannequin 15 can be modified as shown in FIG. 15. At the periphery of the flange 15c is welded a cylindrical crown 15h, which is coaxial with the axis 16 of the mannequin 15 (FIG. 2) and which has an outside diameter equal to the outside diameter of the sealing ring. The outer cylindrical surface of the crown 15h forms the molding surface 15f. The crown 15h is extended downwards by a cylindrical skirt 15i, which has an outside diameter slightly smaller than the inside diameter of the suction orifice 2 of the volute. The crown 4 ′ of the pump also has a cylindrical shape and is detachably fixed to the crown 1 5 h of the mannequin by drawing screws like that shown at 44 in FIG. 15, which are screwed into tapped holes 45 of the crown 4 '. A spacing e 3 is maintained between the crown 4 ′ and the crown 1 5 h by pushing screws like that shown at 46 in FIG. 15, for example by three pushing screws spaced angularly by 120 °. Sealing rings 47 are arranged around each of the screws 44 and 46. The rings 47 arranged around the screws 44 can also serve as spacing rings, in which case the pushing screws 46 can be omitted.

Après que le mannequin a été positonné par rapport à la volute 1 comme dans le mode de réalisation décrit plus haut, un bourrelet d'étanchéité 48 est disposé entre la jupe cylindrique 15i et l'orifice d'aspiration 2 comme montré dans la figure 16. Ensuite une résine 36, par exemple la résine «Chockfast Orange» déjà mentionnée plus haut, est coulée dans la réservation 6 afin de noyer complètement la couronne 4'. Dans le même temps, la couronne supérieure 5 de la pompe est scellée de la manière précédemment décrite. Après durcissement de la résine 36, les vis 44 et 46 sont enlevées et le mannequin 15 est extrait de bas en haut à travers le puits 3 de la volute comme dans le mode de réalisation précédemment décrit. Après démoulage, on obtient une surface moulée cylindrique 38' (figure 17) apte à recevoir la bague d'étanchéité cylindrique 8'. Cette dernière comporte des trous 49 qui sont alignés avec les trous taraudés 45 de la couronne 4', et dans lesquels sont engagées des vis 51 pour fixer la bague d'étanchéité 8' à la couronne 4'.After the manikin has been positioned relative to the volute 1 as in the embodiment described above, a sealing bead 48 is placed between the cylindrical skirt 15i and the suction orifice 2 as shown in FIG. 16 Then a resin 36, for example the "Chockfast Orange" resin already mentioned above, is poured into the reservation 6 in order to completely drown the crown 4 '. At the same time, the upper crown 5 of the pump is sealed in the manner previously described. After hardening of the resin 36, the screws 44 and 46 are removed and the dummy 15 is extracted from bottom to top through the well 3 of the volute as in the embodiment previously described. After demolding, a cylindrical molded surface 38 'is obtained (FIG. 17) capable of receiving the cylindrical sealing ring 8'. The latter has holes 49 which are aligned with the tapped holes 45 of the ring 4 ', and in which screws 51 are engaged to fix the sealing ring 8' to the ring 4 '.

Claims (6)

1. Process for formation of interfaces between the concrete and mechanical elements of a volute pump in concrete, the pump comprising a volute (1) of concrete having an axial inlet orifice (2) in its lower part and, in its upper part, a well (3) which is generally coaxial to the inlet orifice, upper and lower metal rings (4 and 5) sealed co-axially of each other in recesses (6 and 7) provided in the concrete of the inlet orifice and of the well respectively, a ring seal (8) detachably fixed to the lower ring (4), a metal cover (9) detachably fixed at its periphery to the upper ring (5), a vertical shaft (11) supported axially and mounted for rotation in the cover, and a wheel (14) fixed to the lower and of the shaft and having a part (14a) positioned facing the ring seal and having a clearance with respect to it, characterised in that it comprises, for sealing the lower and upper rings (4 and 5), simultaneously placing the two rings in the respective recesses (6 and 7), embedding each ring in a hardenable resinous material (34, 36), whilst shaping the resinous material with the aid of a special mould having two lower and upper moulding surfaces (15d and 15f), which are co-axial and spaced axially from each other by a predetermined distance corresponding to the vertical distance between the periphery (9a) of the cover (9) and the ring seal (8), in the manner to form, after setting of the resinous material (34, 36), two lower and upper annular blocks of resin reinforced by the rings (4 and 5) and having the moulded surfaces (38 and 37) corresponding to the moulding surfaces (15d and 1 5f) of the mould, and using the moulded surfaces as support surfaces for the ring seal (8) and the cover (9) respectively.
2. Process according to claim 1, characterised in that, for locating two lower and upper rings (4 and 5) in the respective recesses (6 and 7) and for moulding of the resinous material (34, 36) a dummy (15) having the two lower and upper moulding surfaces (1 5d and 15f) is used, the rings (4 and 5) are detachably fixed respectively to lower and upper moulding surfaces (15f and 15d) of the dummy (15), whilst creating a space (01, e2) between each of the rings and the moulding surface associated therewith, the dummy (15) with the rings (4 and 5) is introduced into the well (3) of the volute (1), the position and the height of the dummy (15) is adjusted with respect to the volute (1) so that the rings are co-axial with the axis of the volute and are at the height of the recesses (6 and 7), the resinous material (34, 36) is poured into the recesses (6 and 7) and into the spaces between the moulding sufaces and the rings, then, after hardening of the resinous material, the dummy is detached from the rings and removed from the well (3), after which the ring seal (8) is fixed to the lower ring (4), the wheel (14), the shaft (11) and the cover (9) are introduced into the volute (1) and the cover is fixed to the upper ring (15).
3. Process according to claim 2, characterised in that the dummy (15) has a generally cylindrical shape and comprises, at its upper part, an annular flange (15b), the lower face of which constitutes the upper moulding surface (15d), and in that, in the case where the ring seal (8) is in the form of a flat annulus, the dummy (15) comprises, at its upper part, another annular flange (15c, 15g), of which the lower face constitutes the lower moulding surface (15f).
4. Process according to claim 2, characterised in thatthe dummy (15) has a generally cylindrical shape and comprises, at its upper part, an annular flange (15b) the lower face of which constitutes the upper moulding surface (15d) and in that, in the case where the sealing ring (8') is cylindrical, the dummy (15) comprises, at its lower part, a cylindrical part (15h), the exterior surface of which constitutes the lower moulding surface (15f).
5. Process according to claim 3, characterised in that the pouring of the resinous material (34, 36) into the said recesses (6, 7) and into the said spaces (el e2) is carried out in two stages, a mortar of resin (34) being poured in a first stage into the said recesses (6 and 7) to a depth such that the metal rings (4 and 5) are at least partially embedded in the resinous mortar, and, in the second stage, after setting of the resinous mortar (34), a hardenable resin (36) is poured in such a way as to fill completely the space between the resinous mortar (34) and the moulding surfaces (15d and 15f) of the dummy (15).
6. Volute pump in concrete, comprising a volute (1) of concrete having an axial inlet orifice (2) in its lower part and, in its upper part, a well (3) which is generally co-axial to the inlet orifice, two lower and upper metal rings (4 and 5) sealed co-axially of each other in recesses (6 and 7) provided respectively in the concrete of the inlet orifice and of the well (3), a ring seal (8) detachably fixed to the lower ring (4), a metal cover (9) detachably fixed at its periphery (9a) to the upper ring (5), a vertical shaft (11) supported axially and mounted for rotation in the cover, and a wheel (14) fixed to the lower end of the shaft (11) and which has a part positioned facing the ring seal (8) and having a clearance with respect to it, characterised in that the metal rings (4 and 5) are embedded respectively in two annular blocks of resinous material (34, 36), which are moulded in respective ones of the recesses (6, 7) and which have each a moulded surface (38, 37) serving to support respectively the ring seal (8) and the cover (9).
EP87400016A 1986-01-20 1987-01-07 Method for installing mechanical sealing elements of a pump with a concrete housing in this housing Expired - Lifetime EP0238363B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8600685 1986-01-20
FR8600685A FR2593246B1 (en) 1986-01-20 1986-01-20 PROCESS FOR PRODUCING THE INTERFACES BETWEEN THE CONCRETE ELEMENTS AND THE MECHANICAL ELEMENTS OF A CONCRETE VOLUME PUMP AND PUMP OBTAINED BY THIS PROCESS

Publications (2)

Publication Number Publication Date
EP0238363A1 EP0238363A1 (en) 1987-09-23
EP0238363B1 true EP0238363B1 (en) 1990-01-31

Family

ID=9331249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400016A Expired - Lifetime EP0238363B1 (en) 1986-01-20 1987-01-07 Method for installing mechanical sealing elements of a pump with a concrete housing in this housing

Country Status (6)

Country Link
US (1) US4720238A (en)
EP (1) EP0238363B1 (en)
JP (1) JPS62189400A (en)
DE (2) DE3761582D1 (en)
ES (1) ES2014023B3 (en)
FR (1) FR2593246B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3798457B2 (en) * 1996-01-23 2006-07-19 株式会社東芝 Hydraulic machine
FR2793183B1 (en) * 1999-05-03 2001-07-27 Alstom METHOD FOR MANUFACTURING A VOLUME PUMP BODY AND CORRESPONDING VOLUME PUMP BODY
JP4927584B2 (en) * 2007-02-15 2012-05-09 株式会社荏原製作所 Pump installation structure, pump installation method and pump station
SE532101C2 (en) * 2007-06-11 2009-10-20 Vertical Wind Ab Vertical axle wind turbine
FR2958347A1 (en) 2010-04-01 2011-10-07 Alstom Technology Ltd CONCRETE VOLUME PUMP
CN102296577B (en) * 2011-05-27 2012-07-04 长江勘测规划设计研究有限责任公司 Embedding technology of volute combination of large hydroelectric generating set

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161177A (en) * 1936-07-30 1939-06-06 Paul W Leisner Bridge construction
US2529880A (en) * 1949-03-15 1950-11-14 Elliott Co Turboexpander
US2842208A (en) * 1953-09-14 1958-07-08 Phillips Petroleum Co Spring mounted vertical pump support
US3186685A (en) * 1963-09-18 1965-06-01 Dominion Eng Works Ltd Method for construction of hydraulic turbine spiral cases
US3242871A (en) * 1964-10-13 1966-03-29 Gen Motors Corp Domestic appliance pump
US3779667A (en) * 1972-02-24 1973-12-18 Baker Hydro Inc Semi-seal device
US4245952A (en) * 1979-05-10 1981-01-20 Hale Fire Pump Company Pump
JPS5827118U (en) * 1981-08-18 1983-02-21 三洋電機株式会社 packing equipment
DE3515547C1 (en) * 1985-04-30 1986-01-02 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Barrel-type centrifugal-pump unit

Also Published As

Publication number Publication date
JPS62189400A (en) 1987-08-19
ES2014023B3 (en) 1990-06-16
FR2593246B1 (en) 1988-03-25
FR2593246A1 (en) 1987-07-24
DE238363T1 (en) 1988-02-04
US4720238A (en) 1988-01-19
EP0238363A1 (en) 1987-09-23
JPH0368240B2 (en) 1991-10-25
DE3761582D1 (en) 1990-03-08

Similar Documents

Publication Publication Date Title
EP0238363B1 (en) Method for installing mechanical sealing elements of a pump with a concrete housing in this housing
EP0715946A1 (en) Method for producing an optical lens from synthetic polymerisable material and corresponding device
WO1983001823A1 (en) Method for obtaining hollow structures, such as conduits, silos or shelters and structures obtained by such method
WO2010058114A1 (en) Ring for a hydrostatic and hydrodynamic bearing, hydraulic machine provided with such a ring and method for mounting such a ring on a shaft
FR2502057A1 (en) MOLD PLANT FOR CONFORMING CONCRETE ELEMENTS, IN PARTICULAR WELL RINGS, WELL COLLARS OR THE LIKE
EP3652056A1 (en) Mooring for anchoring a floating structure
FR2584144A1 (en) PROPELLER OR SIMILAR TO REPORTED BLADES
EP1217283A1 (en) Tube or similar; female endring and method for fabricating such a tube or similar
EP3330023B1 (en) Overmoulded frame for bar feeder
WO2016066907A1 (en) Method for manufacturing concrete construction blocks for a wind-turbine tower and associated system
FR2662722A1 (en) Frangible insert for a concrete wall
EP0945554A1 (en) Wall construction for shafts, prefabricated wall element for said construction, and casting mould for producing the wall element
EP3763895A1 (en) Device for attaching a supporting part and method for manufacturing a construction element incorporating said attachment device
EP3201399A1 (en) Method of manufacturing an underground storage tank and corresponding tank
EP0887479A1 (en) Prefabricated manhole for connection and inspection of sewer pipes and process for installing such a manhole
EP0508875B1 (en) Prefabricated tubular element
EP0814221B1 (en) Process for fabricating a concrete mast, apparatus for carrying out the process and mast obtained therefrom
EP0924352B1 (en) Inspection chamber for underground pipe system
FR2543281A1 (en) DEVICE AND METHOD FOR REALIZING A REFRACTORY COATING
FR2871824A1 (en) Prefabricated frame units for constructing e.g. tunnel and channel, have upper and lower walls with reservations that are situated close to abutment sides of one unit, where units have thickness of specific millimeter and reduced length
FR2905713A1 (en) Swimming pool`s body shell molding device, has reservation part cooperated with entire height of plating surface to form projection that forms reservation in wall of shell, where reservation permits assembling of prefabricated elements
FR2793183A1 (en) Spiral pump body manufacturing procedure uses concrete poured into shuttering housing with mould and spiral core
BE1012107A6 (en) Trough connection method
CA2084632C (en) Adjustable removable cunette
FR2672921A1 (en) Circular formwork

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES GB IT NL

ITCL It: translation for ep claims filed

Representative=s name: JACOBACCI CASETTA & PERANI S.P.A.

TCNL Nl: translation of patent claims filed
GBC Gb: translation of claims filed (gb section 78(7)/1977)
DET De: translation of patent claims
17P Request for examination filed

Effective date: 19880318

17Q First examination report despatched

Effective date: 19890316

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BERGERON-RATEAU

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES GB IT NL

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3761582

Country of ref document: DE

Date of ref document: 19900308

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20020114

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020131

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020325

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030801

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030801

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20030801

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030108

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050126

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060107

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060131

Year of fee payment: 20

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060107