US3732028A - Centrifugal pump, in particular a sand or gravel pump, and a method for operating such a pump - Google Patents

Centrifugal pump, in particular a sand or gravel pump, and a method for operating such a pump Download PDF

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Publication number
US3732028A
US3732028A US00153551A US3732028DA US3732028A US 3732028 A US3732028 A US 3732028A US 00153551 A US00153551 A US 00153551A US 3732028D A US3732028D A US 3732028DA US 3732028 A US3732028 A US 3732028A
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United States
Prior art keywords
pump
casing
inner casing
liner
sand
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Expired - Lifetime
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US00153551A
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English (en)
Inventor
P Heynemanns
F Noordhoff
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Rubberfabriek Vredestein NV
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Rubberfabriek Vredestein NV
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    • 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
    • F04D29/4286—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber

Definitions

  • ABSTRACT Foreign Application Priority Data [5 July 1, 1970 A centrifugal pump of the type such as a sand pump, .a
  • This invention relates to a centrifugal pump in particular a sand or gravel pump, which is destined to suck sand and to convey it under pressure to a required site, and also relates to a method for operating such a pump.
  • the pump casings which are lined have in average a diameter of 250 cm. and a height of 100 cm., the weight amounting to about 7,000 kg. Dispatching the pump casing to the factory, replacing the old liner by a new liner and returning the newly lined pump casing do not only require much time, but, moreover, during this time the work is at a standstill. If this interruption of the work is not allowable, it is necessary to have an extra pump casing in stock.
  • the present invention aims at avoiding these drawbacks which is accomplished with a centrifugal pump according to the invention in that the pump casing a sheet metal inner casing is arranged, such as to be exchangeable, said inner casing being provided with a liner.
  • the liner of the inner casing is worn away, said inner casing is removed from the pump casing and is replaced by a new inner casing, which maybe done on the site.
  • such an inner casing is inexpensive so that there is no objection to keep it in stock on the site. Since, when the liner is worn out, only the metal, usually steel, of the inner casing is of some value and the wall thickness of the inner casing is only small, said inner casing with the worn out liner may be discarded as scrap-iron. Furthermore, it is possible to replace the inner casing of a pump by an inner casing with another liner, if the mixture to be pumped changes.
  • the invention teaches that at least between the pump casing and the curved portion of the sheet metal inner casing facing the curved portion of the pump casing there is an intermediate space which is filled up with finely granulated filler material, such as sand.
  • a clearance of about mm. may be applied with advantage.
  • the filler material for example fine sand, may be introduced into the intermediate space by injection. When the intermediate space is entirely filled up with sand, high pressures may be absorbed.
  • the sand When the inner casing must be removed or when the liner is worn away down to a predetermined thickness, the sand may be washed away or may be squirted from the intermediate space with the aid of water. In consequence of the fact that there is an intermediate space between the pump casing and the inner casing, neither the inner wall of the pump casing nor the inner casing require to be accurately machined so that the cost of manufacturing is low and a rapid manufacture is possible.
  • a preferred embodiment of the centrifugal pump according to the invention is characterized in that the inner casing with the wearing layer is supported exclusively at the outlet and/or at the inlet side of the pump. Apart from the support or connection at the outlet and/or the inlet side of the pump the inner casing provided with the liner is cantilevered in the pump casing.
  • the inner casing is preferably provided at the inner side of each of the faces with a metal ring, said rings each being secured by means of bolts to a removable part of the pump casing.
  • the removable part of the pump casing may, according to the invention, be formed, for example, by a cover of the pump casing.
  • a preferred embodiment of the pump according to the invention is characterized in that the metal ring situated at the inner side of at least one of the faces of the inner casing is secured with the aid of bolts to an annular intermediate element arranged between the cover of the pump casing.
  • a method for operating the centrifugal pump according to the invention is characterized in that, calculated on the service life of the wearing layer, operation is carried out during the initial period with a sand filling and during the subsequent end period without a sand filling the space between the pump casing and the inner casing.
  • FIG. 1 is a cross-section of a pump casing
  • FIG. 2 is a longitudinal section of said pump casing
  • FIG. 3 is a longitudinal section of part of another embodiment of the pump casing.
  • the pump casing I is constructed in a usual manner so that it will not be described in detail.
  • the inner casing 2 is provided at its inner side with a liner 4 of rubber or some other wear-resistant material.
  • a liner 4 of rubber or some other wear-resistant material In one of the faces 5 of said liner :1 steel ring 6 is provided, said steel ring being fastened by means of bolts 7 to the cover 8 of the pump casing I.
  • a material for a wear-resistant liner a rubber composition of the following components may be mentioned:
  • Sheets I and II Polybutadiene rubber Kaolin Soot (semi-active) Coumarone resin parts by weight l0 20 parts by weight 30 50 parts by weight 20 50 parts by weight 4 parts by weight Zinc white 3-5 parts by weight MTBS 0,8 part by weight DPG 0,4 part by weight Sulphur 2-3 parts by weight
  • a normal primer available in the market may be used, for instance as may be purchased under the trade marks Chemlock, Thixon," or Ty Ply," said primer being provided with a solution of the above-mentioned rubber mixture to which tackifiers are added, as may be purchased under the trademarks Amberol or Pentalyn K.”
  • the liner 4 connects to a lined end portion which by means of bolts is fastened to the pump casing.
  • annular intermediate element which is secured to the inner casing with the aid of bolts 7 engaging in threaded holes of rings 6 arranged in the liner.
  • the intermediate element itself is also secured to the pump casing by means of bolts.
  • Pump covers (not shown) are connected to said intermediate element. With the aid of said intermediate element the inner casing may easily and rapidly be removed from the pump casing.
  • a centrifugal pump of the type such as a sand pump, a gravel pump and the like comprising:
  • an outer pump casing having an outlet-inlet side, a sheet metal inner casing exchangeably arranged in said outer pump casing removably secured to the P p a liner of wear-resistant elastic material lining said sheet metal inner casing forming a single unit with said inner casing,
  • said inner casing being secured exclusively at at least one of the sides of said outer pump casing formed by said outlet-inlet side of said pump casing, an intermediate space between said outer pump casing and said inner casing which are positioned spaced from each other, and
  • centrifugal pump of claim 1 further characterized by:
  • said liner being of rubber
  • the centrifugal pump of claim 1 further characterized by:
  • the centrifugal pump of claim 1 further characterized by:
  • a metal ring provided at least at one of the sides of said inner casing and connected by bolts to said cover.
  • the centrifugal pump of claim 1 further characterized by:
  • said intermediate member at one of its sides, bolted to'said outer pump casing, and at its other side, bolted to said cover,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00153551A 1970-07-01 1971-06-16 Centrifugal pump, in particular a sand or gravel pump, and a method for operating such a pump Expired - Lifetime US3732028A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL707009709A NL140039B (nl) 1970-07-01 1970-07-01 Pomphuis voor een centrifugaalpomp, in het bijzonder zand- of grintpomp.

Publications (1)

Publication Number Publication Date
US3732028A true US3732028A (en) 1973-05-08

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ID=19810473

Family Applications (1)

Application Number Title Priority Date Filing Date
US00153551A Expired - Lifetime US3732028A (en) 1970-07-01 1971-06-16 Centrifugal pump, in particular a sand or gravel pump, and a method for operating such a pump

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US (1) US3732028A (enrdf_load_html_response)
JP (1) JPS5115242B1 (enrdf_load_html_response)
BE (1) BE768522A (enrdf_load_html_response)
CA (1) CA967060A (enrdf_load_html_response)
DE (1) DE2132367B2 (enrdf_load_html_response)
FR (1) FR2100131A5 (enrdf_load_html_response)
GB (1) GB1339059A (enrdf_load_html_response)
NL (1) NL140039B (enrdf_load_html_response)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076450A (en) * 1976-01-14 1978-02-28 United Centrifugal Pumps Double volute pump with replaceable lips
US4120605A (en) * 1975-05-09 1978-10-17 Skega Aktiebolag Wear liners for abrasive-material handling equipment
US4234291A (en) * 1978-06-16 1980-11-18 Skega Aktiebolag Wear lining
US4349313A (en) * 1979-12-26 1982-09-14 United Technologies Corporation Abradable rub strip
US4737072A (en) * 1984-09-20 1988-04-12 Ihc Holland N.V. Centrifugal pump
US5513954A (en) * 1994-06-10 1996-05-07 Envirotech Pumpsystems, Inc. Multilayer pump liner
US6953321B2 (en) 2002-12-31 2005-10-11 Weir Slurry Group, Inc. Centrifugal pump with configured volute
US20140072423A1 (en) * 2012-09-11 2014-03-13 Nidec Corporation Centrifugal fan
CN105736444A (zh) * 2016-04-01 2016-07-06 长江南京航道工程局 一种采用耐磨铸铁镶嵌件的大型泥泵泵壳及焊接固定方法
CN106122094A (zh) * 2016-06-17 2016-11-16 马鞍山力诺机械设备制造有限公司 一种单壳体离心式渣浆泵泵头及其制造方法
US20180017073A1 (en) * 2015-01-27 2018-01-18 Mitsubishi Heavy Industries Compressor Corporation Centrifugal compressor casing and centrifugal compressor
CN112594210A (zh) * 2021-02-08 2021-04-02 齐齐哈尔欣日机械设备制造有限公司 一种用于抽沙泵中镶嵌式的耐磨瓦结构
US11135603B2 (en) * 2013-08-09 2021-10-05 Weir Minerals Australia Ltd. Cyclone separator apparatus and methods of production

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226364B (en) * 1988-12-24 1992-10-28 Skf Gmbh Liquid pump

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1591939A (en) * 1924-01-21 1926-07-06 Allis Chalmers Mfg Co Pump or the like
US1671054A (en) * 1924-01-21 1928-05-22 Allis Chalmers Mfg Co Pump or the like
GB341305A (en) * 1929-02-28 1931-01-15 Wilhelm Beck Improvements in centrifugal pumps
GB341362A (en) * 1929-06-13 1931-01-15 Naamlooze Vennootschap Scheeps Improvements in and relating to rubber lined centrifugal pumps
US2382839A (en) * 1944-06-05 1945-08-14 Wuensch Charles Erb Centrifugal pump
DE1088812B (de) * 1956-01-18 1960-09-08 Franz Clouth Rheinische Gummiw Auswechselbare Auskleidung fuer Kreiselpumpen
DE1096752B (de) * 1959-02-27 1961-01-05 Eddelbuettel & Schneider Verschleissfeste Kreiselpumpe, deren Gehaeuse mit Gummi als Verschleissschutz ausgekleidet ist

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094075A (en) * 1960-06-08 1963-06-18 Denver Equip Co Centrifugal pumps

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1591939A (en) * 1924-01-21 1926-07-06 Allis Chalmers Mfg Co Pump or the like
US1671054A (en) * 1924-01-21 1928-05-22 Allis Chalmers Mfg Co Pump or the like
GB341305A (en) * 1929-02-28 1931-01-15 Wilhelm Beck Improvements in centrifugal pumps
GB341362A (en) * 1929-06-13 1931-01-15 Naamlooze Vennootschap Scheeps Improvements in and relating to rubber lined centrifugal pumps
US2382839A (en) * 1944-06-05 1945-08-14 Wuensch Charles Erb Centrifugal pump
DE1088812B (de) * 1956-01-18 1960-09-08 Franz Clouth Rheinische Gummiw Auswechselbare Auskleidung fuer Kreiselpumpen
DE1096752B (de) * 1959-02-27 1961-01-05 Eddelbuettel & Schneider Verschleissfeste Kreiselpumpe, deren Gehaeuse mit Gummi als Verschleissschutz ausgekleidet ist

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4120605A (en) * 1975-05-09 1978-10-17 Skega Aktiebolag Wear liners for abrasive-material handling equipment
US4076450A (en) * 1976-01-14 1978-02-28 United Centrifugal Pumps Double volute pump with replaceable lips
US4234291A (en) * 1978-06-16 1980-11-18 Skega Aktiebolag Wear lining
US4321742A (en) * 1978-06-16 1982-03-30 Skega Aktiebolag Method of producing curved wear lining
US4349313A (en) * 1979-12-26 1982-09-14 United Technologies Corporation Abradable rub strip
US4737072A (en) * 1984-09-20 1988-04-12 Ihc Holland N.V. Centrifugal pump
US5513954A (en) * 1994-06-10 1996-05-07 Envirotech Pumpsystems, Inc. Multilayer pump liner
US6953321B2 (en) 2002-12-31 2005-10-11 Weir Slurry Group, Inc. Centrifugal pump with configured volute
US20140072423A1 (en) * 2012-09-11 2014-03-13 Nidec Corporation Centrifugal fan
US9458852B2 (en) * 2012-09-11 2016-10-04 Nidec Corporation Centrifugal fan having a flow control member
US11135603B2 (en) * 2013-08-09 2021-10-05 Weir Minerals Australia Ltd. Cyclone separator apparatus and methods of production
US20180017073A1 (en) * 2015-01-27 2018-01-18 Mitsubishi Heavy Industries Compressor Corporation Centrifugal compressor casing and centrifugal compressor
US10539151B2 (en) * 2015-01-27 2020-01-21 Mitsubishi Heavy Industries Compressor Corporation Centrifugal compressor casing and centrifugal compressor
CN105736444A (zh) * 2016-04-01 2016-07-06 长江南京航道工程局 一种采用耐磨铸铁镶嵌件的大型泥泵泵壳及焊接固定方法
CN105736444B (zh) * 2016-04-01 2018-06-26 长江南京航道工程局 一种采用耐磨铸铁镶嵌件的大型泥泵泵壳及焊接固定方法
CN106122094A (zh) * 2016-06-17 2016-11-16 马鞍山力诺机械设备制造有限公司 一种单壳体离心式渣浆泵泵头及其制造方法
CN112594210A (zh) * 2021-02-08 2021-04-02 齐齐哈尔欣日机械设备制造有限公司 一种用于抽沙泵中镶嵌式的耐磨瓦结构
CN112594210B (zh) * 2021-02-08 2024-05-03 齐齐哈尔欣日机械设备制造有限公司 一种用于抽沙泵中镶嵌式的耐磨瓦结构

Also Published As

Publication number Publication date
JPS5115242B1 (enrdf_load_html_response) 1976-05-15
BE768522A (enrdf_load_html_response) 1971-11-03
CA967060A (en) 1975-05-06
GB1339059A (en) 1973-11-28
FR2100131A5 (enrdf_load_html_response) 1972-03-17
NL140039B (nl) 1973-10-15
NL7009709A (enrdf_load_html_response) 1972-01-04
DE2132367B2 (de) 1976-11-18
DE2132367A1 (de) 1972-01-05

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