EP0238363B1 - Procédé d'installation des éléments mécaniques scellés d'une pompe à volute en béton dans ladite volute - Google Patents

Procédé d'installation des éléments mécaniques scellés d'une pompe à volute en béton dans ladite volute Download PDF

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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
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German (de)
English (en)
French (fr)
Other versions
EP0238363A1 (fr
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
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Publication date
Application filed by BERGERON-RATEAU filed Critical BERGERON-RATEAU
Publication of EP0238363A1 publication Critical patent/EP0238363A1/fr
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Publication of EP0238363B1 publication Critical patent/EP0238363B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP87400016A 1986-01-20 1987-01-07 Procédé d'installation des éléments mécaniques scellés d'une pompe à volute en béton dans ladite volute Expired - Lifetime EP0238363B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8600685 1986-01-20
FR8600685A FR2593246B1 (fr) 1986-01-20 1986-01-20 Procede pour la realisation des interfaces entre les elements en beton et les elements mecaniques d'une pompe a volute en beton et pompe obtenue par ce procede

Publications (2)

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

Family

ID=9331249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400016A Expired - Lifetime EP0238363B1 (fr) 1986-01-20 1987-01-07 Procédé d'installation des éléments mécaniques scellés d'une pompe à volute en béton dans ladite volute

Country Status (6)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3798457B2 (ja) * 1996-01-23 2006-07-19 株式会社東芝 水力機械
FR2793183B1 (fr) * 1999-05-03 2001-07-27 Alstom Procede de fabrication d'un corps de pompe a volute et corps de pompe a volute correspondant
JP4927584B2 (ja) * 2007-02-15 2012-05-09 株式会社荏原製作所 ポンプ据付構造及びポンプ据付方法及びポンプ機場
SE532101C2 (sv) * 2007-06-11 2009-10-20 Vertical Wind Ab Vertikalaxlat vindkraftaggregat
FR2958347A1 (fr) 2010-04-01 2011-10-07 Alstom Technology Ltd Pompe a volute en beton
CN102296577B (zh) * 2011-05-27 2012-07-04 长江勘测规划设计研究有限责任公司 大型水轮发电机组蜗壳组合埋设方法

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 (ja) * 1981-08-18 1983-02-21 三洋電機株式会社 梱包装置
DE3515547C1 (de) * 1985-04-30 1986-01-02 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Kreiselpumpenaggregat in Topfausführung

Also Published As

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

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