US20040057852A1 - Suction diffuser - Google Patents

Suction diffuser Download PDF

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Publication number
US20040057852A1
US20040057852A1 US10/610,041 US61004103A US2004057852A1 US 20040057852 A1 US20040057852 A1 US 20040057852A1 US 61004103 A US61004103 A US 61004103A US 2004057852 A1 US2004057852 A1 US 2004057852A1
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US
United States
Prior art keywords
strainer
housing
pump
suction diffuser
inlet
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.)
Abandoned
Application number
US10/610,041
Inventor
Colin Evans
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.)
Olympus Ormskirk Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to HATTERSLEY NEWMAN HENDER LIMITED reassignment HATTERSLEY NEWMAN HENDER LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EVANS, COLIN
Publication of US20040057852A1 publication Critical patent/US20040057852A1/en
Abandoned legal-status Critical Current

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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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

  • the present invention relates to a suction diffuser. It is intended particularly but not exclusively for use in liquid pumping systems where the pump is of the centrifugal type.
  • a prior solution to this arrangement is to replace the long sweeping bend with a compact 90°fitting and simultaneously, incorporate the strainer valve element in the fitting. Providing flow straighteners in the outlet port of the fitting to the inlet of the pump compensates for the absence of the long sweeping bend.
  • the cylindrical strainer element is positioned co-axially and horizontally with the bore of the pump inlet. Liquid flow enters the fitting vertically downwards and passes through the strainer element from the outside surface to the inside and then into the pump.
  • the strainer element is cylindrical and is coaxially arranged with the inlet of the strainer.
  • Flow straighteners may be fitted between the strainer element and the pump.
  • a drain is provided in the strainer to enable material collected by the element to be removed from the strainer.
  • the drain may comprise a plug arranged coaxial with or parallel to the strainer element.
  • Magnets may be provided to facilitate removal of magnetic material.
  • the strainer housing advantageously comprises a removable cover to enable access to the strainer element.
  • the strainer element may be provided with handles to facilitate insertion into and removal from the strainer housing.
  • the strainer may be provided with a support to alleviate strain on the body of the pump.
  • FIG. 1 diagrammatically shows a known suction diffuser arrangement
  • FIG. 2 shows a further known suction diffuser arrangement
  • FIG. 3 shows a suction diffuser arrangement according to the invention.
  • FIGS. 1 illustrates the first prior art arrangement referred to in the introductory part of the specification.
  • a strainer 1 is disposed upstream of a centrifugal pump 3 and is connected to that pump via a length of pipe incorporating a long sweeping bend 2 .
  • Liquid enters via a flow inlet 4 to the strainer 1 and exists via outlet 5 from the centrifugal pump.
  • This arrangement is disadvantageous because it occupies a large amount of space.
  • FIG. 2 illustrates the second prior art arrangement referred to in the introductory part of the specification.
  • the long sweeping bend 2 of the arrangement of FIG. 1 has been replaced by a compact 90°fitting 6 in which the strainer comprising a strainer element 7 is fitted.
  • Flow straighteners 8 compensate for the absence of the bend.
  • the disadvantage here is that material 9 accumulates in the restricted space 10 between the strainer element of the housing surrounding it restricting flow.
  • cylindrical strainer element 11 is arranged within the housing 12 (in the form of a 90°fitting) of the strainer with its axis in line with the direction of inlet flow into the strainer (in this case vertical).
  • the incoming (contaminated) liquid therefore flows first into the interior of the cylindrical strainer element 11 and then out through the element to the exterior of the element in the direction of arrows 13 .
  • Particles suspended in the liquid are retained within the cylindrical element where there is more space and sink to the base of the element at 14 where they may be removed via a drain plug 15 in the strainer housing 12 .
  • the plug 15 may be disposed coaxial with or parallel to the axis of the element 11 . Collected particles may be blown out and magnets may be provided to assist in the removal of metal particles.
  • Flow straighteners 16 are disposed adjacent the inlet of the centrifugal pump 3 .
  • a bolted cover 17 is attached to the strainer housing 12 .
  • the element 11 is fitted with handles 19 for ease of inserting and removal. This enables “start up” elements to be fitted and removed after commissioning a system.
  • a pipe support 18 is provided on the base of the device to alleviate any strain on the body of the centrifugal pump 3 . With the above described arrangement a much greater space is provided for the collection of material and its removal is facilitated. The restricted space between the strainer element and surrounding strainer body is kept free of the material thus avoiding any resultant restriction of the flow.

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

Abstract

A suction diffuser comprising a housing 12 and a strainer element 11. The element 11 is arranged within the housing 12 with its axis in line with the direction of inlet flow into the strainer so that, in operation, incoming contaminated liquid flows first into the interior of the element 11 and then out through the element to the exterior thereof. Particles suspended in the liquid are retained within the element, where there is more space, and sink to the base of the element where they may be removed via a drain plug 15 in the housing 12. In this way the restricted space between the element and surrounding body of the strainer is kept free of material thus avoiding any resultant restriction of the flow.

Description

  • The present invention relates to a suction diffuser. It is intended particularly but not exclusively for use in liquid pumping systems where the pump is of the centrifugal type. [0001]
  • There is a general requirement in pumping systems for the conditioning of the liquid before entering the suction side of the pump to ensure that the liquid is clean and that its flow velocity is reasonably uniform. This is to avoid damage to the pump from solid particles in suspension and from irregular flow patterns which can cause damage to the impeller and impair pump performance. These requirements are satisfied by the fitting of a strainer valve upstream of the pump and the provision of a length of pipe and a long sweeping bend between strainer valve and pump inlet to achieve as close to fully developed flow as the space will allow. [0002]
  • The disadvantage of this arrangement is the large space required to accommodate the straight length of pipe and long sweeping bend. [0003]
  • A prior solution to this arrangement is to replace the long sweeping bend with a compact 90°fitting and simultaneously, incorporate the strainer valve element in the fitting. Providing flow straighteners in the outlet port of the fitting to the inlet of the pump compensates for the absence of the long sweeping bend. [0004]
  • In this solution the cylindrical strainer element is positioned co-axially and horizontally with the bore of the pump inlet. Liquid flow enters the fitting vertically downwards and passes through the strainer element from the outside surface to the inside and then into the pump. [0005]
  • Such arrangements are susceptible to particles in the liquid accumulating in the limited geometry around the strainer element and restricting flow. The space around the element is dependent on the body cavity dimensions and in practice, is insufficient to allow continual collection of particles, which should fall freely around the external surface of the element to the internal base of the device. Experience has indicated that this is not always consistent. [0006]
  • It is an object of the present invention to mitigate or eliminate this disadvantage. [0007]
  • According to the present invention, there is provided a suction diffuser for use in a liquid pumping system comprising a pump having an inlet and an outlet and strainer having a housing and a strainer element disposed in the housing and an inlet and an outlet connected to the pump in which the strainer element is arranged in relation to the inlet of the strainer so that in use liquid flows through the strainer element and into the housing of the strainer before entering the pump. [0008]
  • In a preferred embodiment of the invention, the strainer element is cylindrical and is coaxially arranged with the inlet of the strainer. Flow straighteners may be fitted between the strainer element and the pump. A drain is provided in the strainer to enable material collected by the element to be removed from the strainer. The drain may comprise a plug arranged coaxial with or parallel to the strainer element. Magnets may be provided to facilitate removal of magnetic material. The strainer housing advantageously comprises a removable cover to enable access to the strainer element. The strainer element may be provided with handles to facilitate insertion into and removal from the strainer housing. The strainer may be provided with a support to alleviate strain on the body of the pump. [0009]
  • In order that the invention may be more clearly understood, one embodiment thereof will now be described, by way of example, with reference to the accompanying drawings, in which: [0010]
  • FIG. 1 diagrammatically shows a known suction diffuser arrangement, [0011]
  • FIG. 2 shows a further known suction diffuser arrangement, and [0012]
  • FIG. 3 shows a suction diffuser arrangement according to the invention.[0013]
  • FIGS. [0014] 1 illustrates the first prior art arrangement referred to in the introductory part of the specification. A strainer 1 is disposed upstream of a centrifugal pump 3 and is connected to that pump via a length of pipe incorporating a long sweeping bend 2. Liquid enters via a flow inlet 4 to the strainer 1 and exists via outlet 5 from the centrifugal pump. This arrangement is disadvantageous because it occupies a large amount of space.
  • FIG. 2 illustrates the second prior art arrangement referred to in the introductory part of the specification. The long sweeping bend [0015] 2 of the arrangement of FIG. 1 has been replaced by a compact 90°fitting 6 in which the strainer comprising a strainer element 7 is fitted. Flow straighteners 8 compensate for the absence of the bend. The disadvantage here is that material 9 accumulates in the restricted space 10 between the strainer element of the housing surrounding it restricting flow.
  • Referring to FIG. 3, which shows an embodiment of the invention, [0016] cylindrical strainer element 11 is arranged within the housing 12 (in the form of a 90°fitting) of the strainer with its axis in line with the direction of inlet flow into the strainer (in this case vertical). The incoming (contaminated) liquid therefore flows first into the interior of the cylindrical strainer element 11 and then out through the element to the exterior of the element in the direction of arrows 13. Particles suspended in the liquid are retained within the cylindrical element where there is more space and sink to the base of the element at 14 where they may be removed via a drain plug 15 in the strainer housing 12. The plug 15 may be disposed coaxial with or parallel to the axis of the element 11. Collected particles may be blown out and magnets may be provided to assist in the removal of metal particles. Flow straighteners 16 are disposed adjacent the inlet of the centrifugal pump 3.
  • To provide access to the strainer element [0017] 11 a bolted cover 17 is attached to the strainer housing 12. The element 11 is fitted with handles 19 for ease of inserting and removal. This enables “start up” elements to be fitted and removed after commissioning a system. A pipe support 18 is provided on the base of the device to alleviate any strain on the body of the centrifugal pump 3. With the above described arrangement a much greater space is provided for the collection of material and its removal is facilitated. The restricted space between the strainer element and surrounding strainer body is kept free of the material thus avoiding any resultant restriction of the flow.
  • It will be appreciated that the above embodiment has been described by way of example only and that many variations are possible without departing from the scope of the invention. [0018]

Claims (8)

What is claimed is:
1. A suction diffuser for use in a liquid pumping system comprising a pump having an inlet and an outlet and strainer having a housing and a strainer element disposed in the housing and an inlet and an outlet connected to the pump in which the strainer element is arranged in relation to the inlet of the strainer so that in use liquid flows through the strainer element and into the housing of the strainer before entering the pump.
2. A suction diffuser as claimed in claim 1, in which the strainer element is cylindrical and is coaxially arranged with the inlet of the strainer.
3. A suction diffuser as claimed in claim, in which flow straighteners are disposed between the strainer element and the pump.
4. A suction diffuser as claimed in claim 1, in which a drain is provided in the strainer to enable material collected by the element to be removed from the strainer.
5. A suction diffuser as claimed in claim 4, in which the drain comprises a plug arranged coaxial with or parallel to the strainer elements.
6. A suction diffuser as claimed in claim 1, in which magnets are provided to facilitate removal of magnetic material.
7. A suction diffuser as claimed in claim 1, in which the strainer housing comprises a removable cover to enable access to the strainer element.
8. A suction diffuser as claimed in claim 1, in which the strainer element comprises handles to facilitate insertion into and removal from the strainer housing.
US10/610,041 2002-09-24 2003-06-30 Suction diffuser Abandoned US20040057852A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0222084A GB2395144A (en) 2002-09-24 2002-09-24 A straining device
GB0222084.6 2002-09-24

Publications (1)

Publication Number Publication Date
US20040057852A1 true US20040057852A1 (en) 2004-03-25

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ID=9944624

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/610,041 Abandoned US20040057852A1 (en) 2002-09-24 2003-06-30 Suction diffuser

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US (1) US20040057852A1 (en)
AU (1) AU2003267634A1 (en)
GB (1) GB2395144A (en)
WO (1) WO2004029464A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110016853A1 (en) * 2008-03-28 2011-01-27 Inergy Automotive Systems Research (Societe Anonyme) SCR system for purifying exhaust gases in NOx
US20140140837A1 (en) * 2012-11-05 2014-05-22 Fluid Handling Llc Flow conditioning feature for suction diffuser
KR101646976B1 (en) * 2016-03-17 2016-08-09 주식회사 원대티지케이 Suction Diffusers
WO2023169288A1 (en) * 2022-03-11 2023-09-14 唐泽霖 Cross-linked polyethylene water pump

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111577662B (en) * 2020-05-26 2021-07-13 山东华立供水设备有限公司 Water pump
CN111664128A (en) * 2020-06-22 2020-09-15 王飞飞 New energy automobile cooling water pump

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US2254402A (en) * 1938-12-08 1941-09-02 Wheatley Thomas Strainer
US3226437A (en) * 1961-09-05 1965-12-28 Gulf Oil Corp N,n'-bisolelyloxamide
US3542201A (en) * 1969-03-14 1970-11-24 Robert L Belonger Pump and strainer assembly for a swimming pool filter system
US4059519A (en) * 1975-12-29 1977-11-22 Purex Corporation Pump basket strainer and assembly
US4426286A (en) * 1981-12-16 1984-01-17 Jacuzzi Inc. Skimmer
US4818389A (en) * 1987-12-31 1989-04-04 Hayward Industries, Inc. Skimmer with flow enhancer
US4861467A (en) * 1986-11-07 1989-08-29 Fukuhara Seisaku Co., Ltd. System for removing contaminants from an oil tank in a hydraulic device
US5269913A (en) * 1991-10-02 1993-12-14 Zarina Holding C.V. Debris trap
US5605622A (en) * 1995-07-18 1997-02-25 Ferraro; Michael J. Swimming pool vacuum system
US5753112A (en) * 1991-11-20 1998-05-19 Caretaker Systems, Inc. Main drain leaf removal system for pools
US5810999A (en) * 1996-11-27 1998-09-22 Fountainhead Technologies, Inc. Water strainer/purifier and method of using same
US5915926A (en) * 1996-04-19 1999-06-29 Stanadyne Automotive Corp. Lift pump for filter module
US6022481A (en) * 1996-09-11 2000-02-08 Shasta Industries Single pump pool cleaning system and method of simultaneously operating a full-function skimmer and multiple cleaning heads
US6068764A (en) * 1998-03-03 2000-05-30 Chau; Yiu Chau Reverse osmosis pump and shut off valve
US6210573B1 (en) * 1999-10-01 2001-04-03 Tony D. Marshall Filtering device for removing lint from the exit hose of a washing machine
US6514051B2 (en) * 2001-03-16 2003-02-04 Bendix Commercial Vehicle Systems, Llc. Oil filter used in combination with a heat generating element
US6520752B1 (en) * 1999-04-08 2003-02-18 James Peter Hosford Pumps and filter assemblies with application to aquatic and other environments
US6592756B1 (en) * 2000-03-24 2003-07-15 Cool Pool Solutions, Inc. Swimming pool skimmer basket handle and reversible weight
US6719900B2 (en) * 2000-06-09 2004-04-13 Agricultural Products, Inc. Agricultural or industrial spin filter
US6848584B2 (en) * 2002-09-26 2005-02-01 Drilltec Patents & Technologies Co., Inc. Strainer basket and method of making and using the same
US20050092668A1 (en) * 2002-06-05 2005-05-05 Piscines Desjoyaux S.A. Compact filtering unit for a swimming pool basin
US6893557B2 (en) * 2002-06-21 2005-05-17 Kimberly D. Harris-Griffin Skimmer basket weight
US6926502B2 (en) * 2002-02-22 2005-08-09 A. O. Smith Corporation Combination shield and conduit box cover

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GB379738A (en) * 1931-06-04 1932-09-05 Stone J & Co Ltd Improvements in and relating to electrically driven pumps
GB809277A (en) * 1956-10-17 1959-02-18 Megator Pumps Compressor Improvements in liquid strainers
GB1020712A (en) * 1961-07-01 1966-02-23 John Clark Pumps Ltd Suction pump strainer suitable for draining very shallow pools of water
FR1593318A (en) * 1968-11-19 1970-05-25
ES2076883B1 (en) * 1993-12-03 1998-10-16 Bombas Electricas Sa CENTRIFUGAL PUMP FOR WATER RECIRCULATION.
ES2192941B1 (en) * 2001-06-15 2005-02-16 Bogemar, S.L. ELECTRIC PUMP FOR WATER RECIRCULATION.

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2254402A (en) * 1938-12-08 1941-09-02 Wheatley Thomas Strainer
US3226437A (en) * 1961-09-05 1965-12-28 Gulf Oil Corp N,n'-bisolelyloxamide
US3542201A (en) * 1969-03-14 1970-11-24 Robert L Belonger Pump and strainer assembly for a swimming pool filter system
US4059519A (en) * 1975-12-29 1977-11-22 Purex Corporation Pump basket strainer and assembly
US4426286A (en) * 1981-12-16 1984-01-17 Jacuzzi Inc. Skimmer
US4861467A (en) * 1986-11-07 1989-08-29 Fukuhara Seisaku Co., Ltd. System for removing contaminants from an oil tank in a hydraulic device
US4818389A (en) * 1987-12-31 1989-04-04 Hayward Industries, Inc. Skimmer with flow enhancer
US5269913A (en) * 1991-10-02 1993-12-14 Zarina Holding C.V. Debris trap
US5753112A (en) * 1991-11-20 1998-05-19 Caretaker Systems, Inc. Main drain leaf removal system for pools
US5605622A (en) * 1995-07-18 1997-02-25 Ferraro; Michael J. Swimming pool vacuum system
US5915926A (en) * 1996-04-19 1999-06-29 Stanadyne Automotive Corp. Lift pump for filter module
US6022481A (en) * 1996-09-11 2000-02-08 Shasta Industries Single pump pool cleaning system and method of simultaneously operating a full-function skimmer and multiple cleaning heads
US5810999A (en) * 1996-11-27 1998-09-22 Fountainhead Technologies, Inc. Water strainer/purifier and method of using same
US6068764A (en) * 1998-03-03 2000-05-30 Chau; Yiu Chau Reverse osmosis pump and shut off valve
US6520752B1 (en) * 1999-04-08 2003-02-18 James Peter Hosford Pumps and filter assemblies with application to aquatic and other environments
US6210573B1 (en) * 1999-10-01 2001-04-03 Tony D. Marshall Filtering device for removing lint from the exit hose of a washing machine
US6592756B1 (en) * 2000-03-24 2003-07-15 Cool Pool Solutions, Inc. Swimming pool skimmer basket handle and reversible weight
US6719900B2 (en) * 2000-06-09 2004-04-13 Agricultural Products, Inc. Agricultural or industrial spin filter
US6514051B2 (en) * 2001-03-16 2003-02-04 Bendix Commercial Vehicle Systems, Llc. Oil filter used in combination with a heat generating element
US6926502B2 (en) * 2002-02-22 2005-08-09 A. O. Smith Corporation Combination shield and conduit box cover
US20050092668A1 (en) * 2002-06-05 2005-05-05 Piscines Desjoyaux S.A. Compact filtering unit for a swimming pool basin
US6893557B2 (en) * 2002-06-21 2005-05-17 Kimberly D. Harris-Griffin Skimmer basket weight
US6848584B2 (en) * 2002-09-26 2005-02-01 Drilltec Patents & Technologies Co., Inc. Strainer basket and method of making and using the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110016853A1 (en) * 2008-03-28 2011-01-27 Inergy Automotive Systems Research (Societe Anonyme) SCR system for purifying exhaust gases in NOx
US9205377B2 (en) * 2008-03-28 2015-12-08 Inergy Automotive Systems Research (Société Anonyme) SCR system for purifying exhaust gases in NOx
US20140140837A1 (en) * 2012-11-05 2014-05-22 Fluid Handling Llc Flow conditioning feature for suction diffuser
EP2914854A4 (en) * 2012-11-05 2016-07-27 Fluid Handling Llc Flow conditioning feature for suction diffuser
AU2013337425B2 (en) * 2012-11-05 2017-07-27 Fluid Handling Llc Flow conditioning feature for suction diffuser
US10240611B2 (en) * 2012-11-05 2019-03-26 Fluid Handling Llc Flow conditioning feature for suction diffuser
KR101646976B1 (en) * 2016-03-17 2016-08-09 주식회사 원대티지케이 Suction Diffusers
WO2023169288A1 (en) * 2022-03-11 2023-09-14 唐泽霖 Cross-linked polyethylene water pump

Also Published As

Publication number Publication date
GB0222084D0 (en) 2002-10-30
GB2395144A (en) 2004-05-19
WO2004029464A1 (en) 2004-04-08
AU2003267634A1 (en) 2004-04-19

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AS Assignment

Owner name: HATTERSLEY NEWMAN HENDER LIMITED, UNITED KINGDOM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EVANS, COLIN;REEL/FRAME:014253/0989

Effective date: 20030402

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION