US3863678A - Pipe grating structure - Google Patents

Pipe grating structure Download PDF

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Publication number
US3863678A
US3863678A US372022A US37202273A US3863678A US 3863678 A US3863678 A US 3863678A US 372022 A US372022 A US 372022A US 37202273 A US37202273 A US 37202273A US 3863678 A US3863678 A US 3863678A
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US
United States
Prior art keywords
passages
disc
grating structure
conduit
fluid flow
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
US372022A
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English (en)
Inventor
Birger Pettersson
Bo Sangfors
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.)
Svenska Rotor Maskiner AB
Original Assignee
Svenska Rotor Maskiner AB
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 Svenska Rotor Maskiner AB filed Critical Svenska Rotor Maskiner AB
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Publication of US3863678A publication Critical patent/US3863678A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/432—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems

Definitions

  • the invention relates to a grating structure intended to be inserted in a conduit in order to homogenize a fluid flow passing through the conduit.
  • a grating structure for the above mentioned purpose comprises a disc-like member traversed by passages extending between opposite faces of the disc and being arranged in parallel rows, the outlets of the passages of adjacent rows being inclined in opposite directions relative to the main direction of fluid flow through the disc.
  • Such a grating subdivides the fluid flow in a conduit into a plurality of jets which cross one another so that whirls are created over the entire cross-sectional area of the conduit downstream of the grating.
  • FIG. I is a part-sectional side view of part of a rotary regenerative air preheater
  • FIG. 2 is a section along line Il-ll of FIG. I drawn on a somewhat larger scale
  • FIG. 3 is a perspective exploded view illustrating the manner of assembling the components of a grating structure shown in FIGS. I and 2;
  • FIG. 4 is a perspective view of a part of the grating structure.
  • the air preheater diagrammatically illustrated in FIG. 1 may be of the conventional Ljungstrom type comprising a rotatable matrix surrounded by a substantially cylindrical housing which is provided with connections I2 for inlet and outlet conduits for the heat exchanging fluids.
  • connections I2 for inlet and outlet conduits for the heat exchanging fluids In FIG. 1 only one such conduit is shown which is indicated by numeral I4 and will be assumed to be the hot gas supply conduit.
  • the conduit I4 is segment-shaped in cross section.
  • a grating structure 16 is disposed in the conduit I4.
  • This grating structure has the form of a disc traversed by passages I8 extending between the opposite faces of the disc and being arranged in parallel rows. the outlets of the passages of adjacent rows being inclined in opposite directions relative to the main direction of fluid flow through the disc. The two different directions of the fluid jets leaving the outlets of the passages I8 are indicated by arrows below the disc I6 in FIG. I.
  • the disc 16 is located at such a distance above the housing II) that the turbulence has substantially subsided before the gas flow reaches the matrix. Thus. when entering the matrix the gas flow is substantially perpendicular to the end surface of the matrix at all points.
  • the disc I6 is somewhat smaller but similar in shape to the cross-section of the conduit I4 so as to leave a gap 20 between the periphery of the disc and the conduit wall. This gap prevents blocking of passages 18 located at the periphery.
  • the grating or disc I6 may be supported in the conduit I4 in any suitable manner, for instance by means of brackets, transverse rods or the like.
  • the grating I6 may be designed and produced in several different ways. In FIGS. 3 and 4 is illustrated one form of grating which is simple and inexpensive.
  • the grating is composed of bars 22 and 24 made from sheet material.
  • the bars 22 are flat and provided with slits 26 extending from one edge at right angles to the length of the bar substantially over half the width thereof so that tongues 28 are formed be tween the slits.
  • the bars 24 are preferably produced by using bars similar to bars 22 and bending adjacent tongues 28A in different directions.
  • the outlet angle of the passages relative to the main direction of fluid flow is of the order of l0 to 40.
  • two or more gratings may be provided mutually longitudinally displaced in the conduit, each grating deflecting the fluid in directions other than those produced by the other.
  • a grating structure adapted to be inserted in a conduit in order to homogenize a fluid flow passing therethrough, comprising a disc-like member traversed by passages which are arranged in parallel rows and which extend between the opposite major surfaces of the disc, the passages being curved and having inlet portions extending in a direction substantially parallel with the main direction of fluid flow over a distance which is substantial relative to the overall thickness of the disclike member and having outlet portions communicating with respective inlet portions, the outlet portions of the passages of adjacent rows being inclined in opposite directions relative to the main direction of fluid flow through the disc.
  • a grating structure as defined in claim I in which the passages are of substantially rectangular crosssection.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Paper (AREA)
  • Air Supply (AREA)
  • Glass Melting And Manufacturing (AREA)
US372022A 1972-08-11 1973-06-21 Pipe grating structure Expired - Lifetime US3863678A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3755772A GB1442329A (en) 1972-08-11 1972-08-11 Grating structures for homogenising fluids

Publications (1)

Publication Number Publication Date
US3863678A true US3863678A (en) 1975-02-04

Family

ID=10397361

Family Applications (1)

Application Number Title Priority Date Filing Date
US372022A Expired - Lifetime US3863678A (en) 1972-08-11 1973-06-21 Pipe grating structure

Country Status (5)

Country Link
US (1) US3863678A (enrdf_load_stackoverflow)
JP (1) JPS4985619A (enrdf_load_stackoverflow)
DE (1) DE2340483A1 (enrdf_load_stackoverflow)
GB (1) GB1442329A (enrdf_load_stackoverflow)
IT (1) IT989440B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5489153A (en) * 1991-07-12 1996-02-06 Siemens Aktiengesellschaft Static mixer assembly with deflection elements
WO1998005872A1 (en) * 1996-08-02 1998-02-12 Jansen Robert C Flow system for pipes, pipe fittings, ducts and ducting elements
US20090000287A1 (en) * 2007-05-15 2009-01-01 Jared Dean Blaisdell Exhaust Gas Flow Device
US20100074814A1 (en) * 2008-09-25 2010-03-25 Cummins Filtration Ip Inc. Reductant decomposition mixer and method for making the same
US20100212301A1 (en) * 2008-12-17 2010-08-26 Korneel De Rudder Flow Device for an Exhaust System
US20110167810A1 (en) * 2010-01-12 2011-07-14 Lebas Jerome Flow device for exhaust treatment system
US8938954B2 (en) 2012-04-19 2015-01-27 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US9670811B2 (en) 2010-06-22 2017-06-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9707525B2 (en) 2013-02-15 2017-07-18 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US11224846B2 (en) * 2016-12-12 2022-01-18 Canada Pipeline Accessories Co., Ltd. Static mixer for fluid flow in a pipeline
USD976384S1 (en) 2020-01-13 2023-01-24 Canada Pipeline Accessories Co., Ltd. Static mixer for fluid flow
US11746960B2 (en) 2018-05-07 2023-09-05 Canada Pipeline Accessories Co., Ltd. Pipe assembly with static mixer and flow conditioner

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920123C1 (enrdf_load_stackoverflow) * 1989-06-20 1990-12-20 Alfred Innsbruck At Hupfauf
DE102006019052A1 (de) * 2006-04-25 2007-10-31 Robert Bosch Gmbh Einbauteil zur Montage in einem Abgasstrang
DE102013211245A1 (de) 2013-06-17 2014-12-18 Robert Bosch Gmbh Mischelement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1012380A (en) * 1910-02-07 1911-12-19 Robert D Loose Mixer for internal-combustion engines.
US1113041A (en) * 1914-05-12 1914-10-06 John J Murphy Gaseous-fuel mixer
US3682443A (en) * 1969-05-23 1972-08-08 Hartmut Upmeier Mixing devices for plastics materials

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4683A (enrdf_load_stackoverflow) * 1971-01-07 1971-01-23

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1012380A (en) * 1910-02-07 1911-12-19 Robert D Loose Mixer for internal-combustion engines.
US1113041A (en) * 1914-05-12 1914-10-06 John J Murphy Gaseous-fuel mixer
US3682443A (en) * 1969-05-23 1972-08-08 Hartmut Upmeier Mixing devices for plastics materials

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5489153A (en) * 1991-07-12 1996-02-06 Siemens Aktiengesellschaft Static mixer assembly with deflection elements
WO1998005872A1 (en) * 1996-08-02 1998-02-12 Jansen Robert C Flow system for pipes, pipe fittings, ducts and ducting elements
GB2332068A (en) * 1996-08-02 1999-06-09 Robert Carl Jansen Flow system for pipes, pipe fittings, ducts and ducting elements
GB2332068B (en) * 1996-08-02 2000-07-12 Robert Carl Jansen Flow system for pipes, pipe fittings, ducts and ducting elements
US8915064B2 (en) 2007-05-15 2014-12-23 Donaldson Company, Inc. Exhaust gas flow device
US20090000287A1 (en) * 2007-05-15 2009-01-01 Jared Dean Blaisdell Exhaust Gas Flow Device
US20100074814A1 (en) * 2008-09-25 2010-03-25 Cummins Filtration Ip Inc. Reductant decomposition mixer and method for making the same
US8499548B2 (en) 2008-12-17 2013-08-06 Donaldson Company, Inc. Flow device for an exhaust system
US9925502B2 (en) 2008-12-17 2018-03-27 Donaldson Company, Inc. Flow device for an exhaust system
US9180407B2 (en) 2008-12-17 2015-11-10 Donaldson Company, Inc. Flow device for an exhaust system
US20100212301A1 (en) * 2008-12-17 2010-08-26 Korneel De Rudder Flow Device for an Exhaust System
US8539761B2 (en) 2010-01-12 2013-09-24 Donaldson Company, Inc. Flow device for exhaust treatment system
US20110167810A1 (en) * 2010-01-12 2011-07-14 Lebas Jerome Flow device for exhaust treatment system
US9810126B2 (en) 2010-01-12 2017-11-07 Donaldson Company, Inc. Flow device for exhaust treatment system
US11608764B2 (en) 2010-06-22 2023-03-21 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US10968800B2 (en) 2010-06-22 2021-04-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9670811B2 (en) 2010-06-22 2017-06-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US10294841B2 (en) 2010-06-22 2019-05-21 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9598999B2 (en) 2012-04-19 2017-03-21 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US10533477B2 (en) 2012-04-19 2020-01-14 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US9458750B2 (en) 2012-04-19 2016-10-04 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US8938954B2 (en) 2012-04-19 2015-01-27 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US10245564B2 (en) 2013-02-15 2019-04-02 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9707525B2 (en) 2013-02-15 2017-07-18 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US10603642B2 (en) 2013-02-15 2020-03-31 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US11110406B2 (en) 2013-02-15 2021-09-07 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US11224846B2 (en) * 2016-12-12 2022-01-18 Canada Pipeline Accessories Co., Ltd. Static mixer for fluid flow in a pipeline
US11746960B2 (en) 2018-05-07 2023-09-05 Canada Pipeline Accessories Co., Ltd. Pipe assembly with static mixer and flow conditioner
USD976384S1 (en) 2020-01-13 2023-01-24 Canada Pipeline Accessories Co., Ltd. Static mixer for fluid flow
USD992107S1 (en) 2020-01-13 2023-07-11 Canada Pipeline Accessories Co., Ltd. Static mixer

Also Published As

Publication number Publication date
GB1442329A (en) 1976-07-14
IT989440B (it) 1975-05-20
JPS4985619A (enrdf_load_stackoverflow) 1974-08-16
DE2340483A1 (de) 1974-02-21

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