EP3269984A1 - Pompe avec brides améliorées - Google Patents

Pompe avec brides améliorées Download PDF

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Publication number
EP3269984A1
EP3269984A1 EP17177919.2A EP17177919A EP3269984A1 EP 3269984 A1 EP3269984 A1 EP 3269984A1 EP 17177919 A EP17177919 A EP 17177919A EP 3269984 A1 EP3269984 A1 EP 3269984A1
Authority
EP
European Patent Office
Prior art keywords
pump
flange
flange body
securing ring
section
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.)
Granted
Application number
EP17177919.2A
Other languages
German (de)
English (en)
Other versions
EP3269984B1 (fr
Inventor
Giuliano Matteazzi
Alberto SAVEGNAGO
Fiorenzo Zamberlan
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.)
Calpeda SpA
Original Assignee
Calpeda SpA
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 Calpeda SpA filed Critical Calpeda SpA
Publication of EP3269984A1 publication Critical patent/EP3269984A1/fr
Application granted granted Critical
Publication of EP3269984B1 publication Critical patent/EP3269984B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4293—Details of fluid inlet or outlet
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet

Definitions

  • the invention relates to a pump equipped with improved flanges for connection to fluid suction and delivery pipes in a system.
  • each pump comprises a pump body in which there is a suction inlet and a delivery outlet and in which a pumping unit is housed which is rotated by a motor by means of a transmission shaft.
  • each suction inlet and delivery outlet there is an associated flange which comprises at least one sealing surface at the front and peripherally a securing ring equipped with through holes for the insertion of the screws used to secure the flange to the counterflange of the corresponding suction or delivery pipe.
  • the suction and delivery pipes are in fact equipped with counterflanges which, like the flanges of the pump, are equipped with matching sealing surfaces and securing counter-rings with through holes for the securing screws.
  • the securing screws are pulled by the tightening of the corresponding nuts, they force the sealing surface against the matching sealing surface respectively of the flange and the counterflange so as to achieve the hydraulic seal.
  • a gasket is interposed between flange and counterflange.
  • FIG. 1 A known pump of the type described is shown in Fig. 1 where the whole is indicated as A and in which the pump body C and the flanges B all pertain to a single cast piece.
  • FIG. 2 Another known pump of the type described is shown in Fig. 2 where the whole is indicated as D and in which each of the flanges E with which it is equipped is secured by welding F to a connection sleeve G which is in turn fixed by a thread H to the body I of the pump.
  • each flange B, E has a peripheral annular surface defining the securing ring, respectively B1, E1, where the through holes B2, E2 for the securing screws are made.
  • the securing rings B1, E1 constitute a single-piece body which includes the corresponding flange.
  • each flange and the corresponding securing ring are made of the same material which is usually suitable to withstand the corrosion of the fluid being pumped and therefore of a high quality and consequently expensive.
  • each flange comprises a flange body pertaining to the pump body and a securing ring in which through holes are made for the securing screws to the respective counterflange, which is coupled removably and rotatably peripherally to the flange body.
  • perimeter grooves are machined with interconnecting profiles designed to define, when each securing ring is coupled to the respective flange body, a groove to house an elastic ring.
  • peripheral ring when assembled, is integral with the flange but is free to rotate peripherally on it.
  • each flange comprises a securing ring separable from the flange body which can thus advantageously be made of a material other than that of the flange body itself, for example carbon steel, which has a much lower cost than, for example, stainless steel with which flange bodies are usually made.
  • the presence of the elastic sealing ring placed peripherally between the flange body and the securing ring makes the latter freely rotatable on the respective flange body and enables the easy alignment of the fixing holes of the securing ring to the corresponding holes of the corresponding counterflange, unlike in the pumps of the known type.
  • the present invention aims to overcome these disadvantages.
  • an initial object of the invention is to provide a pump in which each flange comprises a fixed part of the flange body and a movable part still pertaining to the fixed part, independent and separable.
  • Another object is that the two fixed and mobile parts forming the flange can be connected together by means of connecting means pertaining to both parts.
  • the objects listed are achieved by means of a pump the flanges of which are made according to the main claim to which reference will be made.
  • the pump of the invention is less expensive than equivalent pumps of the prior art.
  • the pump of the invention facilitates the connection of the flanges to the counterflanges of the suction and delivery pipes of a system.
  • a pump body 2 in which there is a suction inlet 3 and a delivery outlet 4 and which houses a pumping unit 5.
  • the pump body 2 there are a pair of flanges, each indicated with 8, one of which is associated with the suction inlet 3 and the other is associated with the delivery outlet 4.
  • each flange 8 comprises a flange body 10 equipped frontally with at least one sealing plane 12 and peripherally with a securing ring 14 for the connection of the flange 8 to a corresponding counterflange pertaining to the suction and delivery pipes of a system, not shown in the drawing.
  • a sealing gasket is inserted between each flange and the corresponding counterflange, not shown in the figure.
  • the securing ring 14 is associated with the respective flange body 10 by means of a threaded joint 16.
  • the threaded joint 16, as seen in Fig. 3a which represents an enlarged detail of Fig. 3 comprises a female thread 16a made in the securing ring 14 and a male thread 16b made outside the flange body 10.
  • connection sleeve 18 which protrudes from the pump body 2 where the flange body 10, connection sleeve 18 and pump body 2 are connected to each other by means of fastening means, indicated as a whole by 20.
  • fastening means 20 may be equally welds 20a, as in the case described in Figs. 3 and 3a , or threads, or other fixing means.
  • the flange body, the connection sleeve and the pump body are made in a single-piece body.
  • connection sleeve 180 is composed of two sections in which a first section 181 is associated with the flange body 10, a second section 182 is associated with the pump body 2 and the first section 181 and the second section 182 are interconnected by means of a threaded joint collar generally indicated by 183.
  • the threaded joint collar 183 comprises a male thread 181a made in the first portion 181 of the connection sleeve 180 and a female thread 182a made in the second portion 182 of the connection sleeve 180.
  • the threaded joint collar 183 comprises a female thread 181b made in the first section 181 of the connection sleeve 180 and a male thread 182b made in the second section 182 of the same connection sleeve 180.
  • This embodiment varies from the embodiment described above only because in the threaded connection 160 the female thread 160a involves only a part A1 of the thickness A of the securing ring 140 and the male thread 160b involves only a part F1 of the thickness F of the flange body 100.
  • the partial threading of the thickness of the securing ring 140 and the flange body 100 allows the axial blocking of the securing ring 140 when being screwed to the flange body 100 when their reciprocal position is as shown in Fig. 6 .
  • the securing ring 140 can be separated from the flange body 100 when being unscrewed, as shown in Fig. 7 .
  • each flange only has the flange body in contact with the fluid constructed with high quality material, usually stainless steel, while the securing ring which is not in contact with the fluid is made of common and less valuable material, such as carbon steel, is achieved.
  • the securing ring is independent and rotatably integral with the flange body, it can easily be rotated to align the through holes of the securing screws with the corresponding counterflange holes thus facilitating the installation of the pump.
  • the pump of the invention with a securing ring rotatably associated with the flange body by means of a threaded joint is also less costly to produce than equivalent pumps having the securing ring associated with the flange body with the interposition of third fastening elements such as for example the pump described in document EP 0907029 which requires the creation of a groove to house an elastic stop ring in the flange body and the securing ring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP17177919.2A 2016-07-13 2017-06-26 Pompe avec brides amélioré Active EP3269984B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000072971A IT201600072971A1 (it) 2016-07-13 2016-07-13 Pompa provvista di flange perfezionate

Publications (2)

Publication Number Publication Date
EP3269984A1 true EP3269984A1 (fr) 2018-01-17
EP3269984B1 EP3269984B1 (fr) 2019-02-27

Family

ID=57610090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17177919.2A Active EP3269984B1 (fr) 2016-07-13 2017-06-26 Pompe avec brides amélioré

Country Status (3)

Country Link
EP (1) EP3269984B1 (fr)
ES (1) ES2727599T3 (fr)
IT (1) IT201600072971A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9310091U1 (de) * 1993-07-07 1993-09-23 J. Hartlage GmbH & Co. KG, 49090 Osnabrück Vertikale kreiselpumpe
EP0566086A1 (fr) * 1992-04-14 1993-10-20 Ebara Corporation Pompe à écoulement latéral
EP0566089A1 (fr) * 1992-04-14 1993-10-20 Ebara Corporation Carter de pompe en tôle
EP0907029A2 (fr) * 1997-10-04 1999-04-07 Grundfos A/S Ensemble de pompe centrifuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0566086A1 (fr) * 1992-04-14 1993-10-20 Ebara Corporation Pompe à écoulement latéral
EP0566089A1 (fr) * 1992-04-14 1993-10-20 Ebara Corporation Carter de pompe en tôle
DE9310091U1 (de) * 1993-07-07 1993-09-23 J. Hartlage GmbH & Co. KG, 49090 Osnabrück Vertikale kreiselpumpe
EP0907029A2 (fr) * 1997-10-04 1999-04-07 Grundfos A/S Ensemble de pompe centrifuge

Also Published As

Publication number Publication date
EP3269984B1 (fr) 2019-02-27
IT201600072971A1 (it) 2018-01-13
ES2727599T3 (es) 2019-10-17

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