WO1991001797A1 - Mechanism for removing solid particles from a liquid-circulating system - Google Patents

Mechanism for removing solid particles from a liquid-circulating system Download PDF

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Publication number
WO1991001797A1
WO1991001797A1 PCT/AU1990/000336 AU9000336W WO9101797A1 WO 1991001797 A1 WO1991001797 A1 WO 1991001797A1 AU 9000336 W AU9000336 W AU 9000336W WO 9101797 A1 WO9101797 A1 WO 9101797A1
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WO
WIPO (PCT)
Prior art keywords
hollow body
stream
sediment
sump
fluids
Prior art date
Application number
PCT/AU1990/000336
Other languages
French (fr)
Inventor
Greg Warner
Original Assignee
Warner, Bernice, Helen
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 Warner, Bernice, Helen filed Critical Warner, Bernice, Helen
Priority to AU61502/90A priority Critical patent/AU652720B2/en
Publication of WO1991001797A1 publication Critical patent/WO1991001797A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/26—Filters with built-in pumps filters provided with a pump mounted in or on the casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/908—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding provoking a tangential stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
    • B01D29/945—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes for continuously discharging concentrated liquid

Definitions

  • the invention relates to the removal of solid particles from fluids c circulation systems . More particularly the invention provides a filtering device to allow removal of solid particles from a flow of fluids without deleterious disruption to the flow of fluids .
  • the radiator usually consists of a number of fine tubes and cool air is forced about the tubes by either use of fans or by the movement of the 5 engine relative to air.
  • these tubes are usually of a narrow eliptical design and consequently any solid particles in the water may singularly or cumulatively cause a restriction or blockage of many of these tubes . This reduces the cooling efficiency of the radiator and I Q gives rise to overheating of the engine .
  • US Patent Nos . 3372807 and 3834539 propose a filter unit for installation in the cooling system of an engine in an automotive vehicle consisting in essence of a chamber through which the water passes .
  • a screen inclined or obliquely orientated is placed in close 2 o proximity to a sump allowing solid particles prevented from passing through the screen to gravitate towards the sump .
  • the sump is provided with a sump plug to allow the solid particles collected in the sump to be removed.
  • a filter unit which consists of a bag-like filter deposed within , the coolant circuit so that the coolant passes through the filter and any solid particles are collected by the bag-like material. This suffers from the same disadvantages as those previously discussed as it requires that the flow of fluid through the coolant circuit is interrupted in order to empty the bag . The system may also interfere with the circulation rate of the coolant if deposits build up restricting the flow of coolant through the coolant system.
  • the present invention provides a device for filtering a fluids stream comprising a hollow body having an inlet and an outlet for the fluids stream, a filter means disposed in the hollow body which substantially traverses the flow path of the fluids stream to define an upstream portion and a downstream portion of the hollow body, and sediment separating means to remove sediment gravitating towards a lower area of the upstream portion of the hollow body.
  • the sediment separating means includes (a) an inlet located in the lower area of the upstream portion to remove a partial stream of the fluids stream in which sediment is entrained, (b) a sump means to receive the partial stream and substantially separate the sediment from the partial stream, and (c) an outlet to return the partial stream from the sump means into the downstream portion of the hollow body.
  • This filtering device enables sediment to be continuously removed from the fluids stream to a remote sump in which it is separated from the circulating fluid medium which is then returned to the fluids stream. Accordingly, there is a constant venturi flow from the hollow body, through the sump and back to the hollow body. Only minimal amounts of fluids stream may be lost in comparison with prior devices which in the main involve disconnection of the fluids stream or expulsion of quantities of the fluids stream.
  • the filter means traverses the entire flow path of the fluids stream.
  • the impact of the fluids stream upon the filter means creates a high pressure area in the upstream portion and a lower pressure area in the downstream portion immediately adjacent to the filter without substantially impacting the flow in any way . Further as the sediment gravitates towards the lower are of the hollow body a transverse pressure differential is also believed to be established . The net effect is that a pressure difference is established between the inlet and outlet of 5 the sediment separating means which induces a venturi flow of the partial stream.
  • the outlet of the sediment separating means is located in an upper area of the downstream portion of the hollow body. This location has been found to induce an improved 0 pressure differential and venturi effect between the inlet and the outlet of the sediment separating means .
  • the filter means is a wire (brass) screen mesh extending substantially entirely across the fluid stream and inclined at an angle towards the direction of the fluid stream.
  • This l _- arrangement has two added advantages .
  • the first is the presentation to the oncoming fluid stream of a larger area of impact than the cross -sectional area of the hollow body and reduces the potential of restriction of flow through the filter .
  • the pressure differential increases so does 20 the venturi effect and thus the flow rate across the screen which helps to clean the screen.
  • the second advantage is the migration of the sediment downwardly under gravity which is assisted by the positive venturi flow.
  • the migration downward under gravity towards and into the sump and venturi return greatly enhances the effectiveness of the sediment removal without associated loss of fluids stream .
  • the sump has a portion which is removable for cleaning purposes .
  • the removable portion may be a cartridge . It may be made of any suitable material and will depend upon the function and environment in which it is to be used . For example, in applying the filtering device to engines and associated services, it is important to appreciate that the considerably hot working environment will make certain materials unsuitable.
  • the cartridge should be placed so that it is adjacent to the hollow body .
  • This arrangement has two distinct advantages .
  • the first is to minimise the loss of any fluids which may still be in the hollow body .
  • the other advantage is that close location enhances the venturi circulation and ensures that it will be at its most effective .
  • Figure 1 is a plan view of the hollow body of the invention .
  • Figure 2 is one side view of the hollow body of Figure 1.
  • Figure 3 is the other side view of the hollow body of Figure 1.
  • Figure 4 is an underneath view of the hollow body of Figure 1.
  • Figure 5 is a cross-sectional view of the hollow body of Figure 1.
  • Figure 6 is one side view of the sump of the invention .
  • Figure 7 is the other side view of the sump of Figure 6.
  • Figure 8 is a cross-sectional view of the sump of Figure 6.
  • a filtering device is shown in Figures 1 to 7 comprising a hollow body 1 of generally cylindrical shape having an inlet 2 and an outlet 3.
  • a screen mesh 4 is disposed in the hollow body 1 and retained to prevent mesh 4 moving in the direction of the flow of the fluids stream.
  • the inlet 2 and outlet 3 have flanged ends to permit ready attachment to radiator hoses used in engines . As such the device can be easily located in the, cooling system of vehicles .
  • the hollow body 1 is also provided with tubes 5 and 6 which protrude 5 tangentially from the cylindrical shape of the hollow body 1.
  • Mesh 4 is positioned obliquely in the hollow body 1 to define an upstream portion and a downstream portion of the hollow body.
  • Tube 5 is located in the upper area of the downstream portion whilst tube 6 is located in the upstream portion, particularly in the upper area .
  • o Hoses (not shown) are connected to tubes 5 and 6 respectively and their other free ends are connected to inlet 8 and outlet 9 respectively of sediment separating sump 7.
  • Sump 7 includes a secondary filter 10 which separates the sediment from the partial stream which circulates between tubes 5 and 6.
  • This sump may be a cartridge which can be readily removed and , if necessary, renewed .
  • the fluids stream enters the hollow body 1 through inlet 2.
  • the mesh 4 tends to decrease the velocity of the stream causing the formation of high pressure area immediately before the mesh 4.
  • a lower pressure area is therefore formed .
  • tube 5 is located in the high pressure area where the sediment separated by the mesh 4 gravitates, and communicates via a sump to tube 6 located in the lower pressure area, a venturi effect is established .
  • a partial fluids stream is induced to flow through sump 7 and after separation of the sediment in the sump 7, through tube 6 into the downstream portion of the hollow body 1.
  • the sump is similar in description to the hollow body except that the two ends of the generally cylindrically shaped body are sealed .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A device for filtering a fluids stream comprising a hollow body (1) having an inlet (2) and an outlet (3) for the fluids stream, a screen mesh (4) disposed in the hollow body which substantially traverses the flow path of the fluids stream to define an upstream portion and a downstream portion of the hollow body, and sediment separating means attached via tubes (5 and 6) to remove sediment gravitating towards a lower area of the upstream portion of the hollow body. The sediment separating means includes (a) an inlet attached to tube (5) located in the lower area of the upstream portion to remove a partial stream of the fluids stream in which sediment is entrained, (b) a sump (7) to receive the partial stream and substantially separate the sediment from the partial stream, and (c) an outlet (9) to return the partial stream from the sump (7) means into tube (6) and into the downstream portion of the hollow body (1).

Description

MECHANISM FOR REMOVING SOLID PARTICLES FROM A LIQUID-CIRCULATING SYSTEM
FΠΓ.T.T) OF THE INVENTION
The invention relates to the removal of solid particles from fluids c circulation systems . More particularly the invention provides a filtering device to allow removal of solid particles from a flow of fluids without deleterious disruption to the flow of fluids .
Whilst the invention is explained with reference to the application of a device in treating the fluids flowing in water cooling systems of engines 0 (eg . internal combustion engines) , it is not so limited . It will be readily apparent to those skilled that the device is applicable to any fluids flow ' in which the presence of solid particles can have a deleterious effect eg . bore water.
DESCRIPTION OF THE PRIOR ART
In engines it is usual to achieve temperature control of the engine block by circulating water within the engine block in heat exchange with the engine and passing the warmed water into a radiator for forced air cooling. Over considerable periods of time or shorter times if the engine is in a dusty environment, solid particles may enter the circulation system. Further, materials from which engines and radiators are fabricated permit the formation of deposits such as rust particles , alloy scale and mineral deposits which may be dislodged and enter the circulating water.
The radiator usually consists of a number of fine tubes and cool air is forced about the tubes by either use of fans or by the movement of the 5 engine relative to air. As maximum heat exchange is desirable to efficiently cool the water in the tubes, these tubes are usually of a narrow eliptical design and consequently any solid particles in the water may singularly or cumulatively cause a restriction or blockage of many of these tubes . This reduces the cooling efficiency of the radiator and I Q gives rise to overheating of the engine .
In an effort to reduce this , a number of devices have been proposed to permit periodic removal of some or all of the water and to permit the flushing of the radiator. An alternate approach has been to insert a screening device into the water flow entering the radiator, with an 5 associated sump into which separated solid particles may collect.
In particular, US Patent Nos . 3372807 and 3834539 propose a filter unit for installation in the cooling system of an engine in an automotive vehicle consisting in essence of a chamber through which the water passes . A screen inclined or obliquely orientated is placed in close 2 o proximity to a sump allowing solid particles prevented from passing through the screen to gravitate towards the sump . In each instance the sump is provided with a sump plug to allow the solid particles collected in the sump to be removed.
This is a dangerous exercise at normal engine temperatures as the 5 warmed water pressurises the system and it is normal to cool the engine before the sump plug is removed . Further, if the sump plug is removed whilst water is still circulating, the water would be pumped out of the system via the sump plug hole .
Another approach to ensuring that unwanted solid particles do not enter the coolant system is disclosed in Australian Patent Application No . 58700/86. A filter unit is provided which consists of a bag-like filter deposed within, the coolant circuit so that the coolant passes through the filter and any solid particles are collected by the bag-like material. This suffers from the same disadvantages as those previously discussed as it requires that the flow of fluid through the coolant circuit is interrupted in order to empty the bag . The system may also interfere with the circulation rate of the coolant if deposits build up restricting the flow of coolant through the coolant system.
In Australian Patent Application No . 226119/88 a valve is proposed to be incorporated to enable the collected particles to removed from the sump . The valve is spring-loaded so the it will reseat into the sump after opening pressure is removed from the valve . Fabrication of such a device has proved to be difficult and costly .
Accordingly, it is an object of the invention to provide a new filtering device for removing solid particles from fluids that is simple in operation, easy to install, and inexpensive to manufacture . DESCRIPTION OF THE INVENTION
The present invention provides a device for filtering a fluids stream comprising a hollow body having an inlet and an outlet for the fluids stream, a filter means disposed in the hollow body which substantially traverses the flow path of the fluids stream to define an upstream portion and a downstream portion of the hollow body, and sediment separating means to remove sediment gravitating towards a lower area of the upstream portion of the hollow body. The sediment separating means includes (a) an inlet located in the lower area of the upstream portion to remove a partial stream of the fluids stream in which sediment is entrained, (b) a sump means to receive the partial stream and substantially separate the sediment from the partial stream, and (c) an outlet to return the partial stream from the sump means into the downstream portion of the hollow body.
This filtering device enables sediment to be continuously removed from the fluids stream to a remote sump in which it is separated from the circulating fluid medium which is then returned to the fluids stream. Accordingly, there is a constant venturi flow from the hollow body, through the sump and back to the hollow body. Only minimal amounts of fluids stream may be lost in comparison with prior devices which in the main involve disconnection of the fluids stream or expulsion of quantities of the fluids stream. Preferably the filter means traverses the entire flow path of the fluids stream.
The impact of the fluids stream upon the filter means creates a high pressure area in the upstream portion and a lower pressure area in the downstream portion immediately adjacent to the filter without substantially impacting the flow in any way . Further as the sediment gravitates towards the lower are of the hollow body a transverse pressure differential is also believed to be established . The net effect is that a pressure difference is established between the inlet and outlet of 5 the sediment separating means which induces a venturi flow of the partial stream.
In a preferred embodiment of the invention , the outlet of the sediment separating means is located in an upper area of the downstream portion of the hollow body. This location has been found to induce an improved 0 pressure differential and venturi effect between the inlet and the outlet of the sediment separating means .
In another preferred embodiment, the filter means is a wire (brass) screen mesh extending substantially entirely across the fluid stream and inclined at an angle towards the direction of the fluid stream. This l _- arrangement has two added advantages .
The first is the presentation to the oncoming fluid stream of a larger area of impact than the cross -sectional area of the hollow body and reduces the potential of restriction of flow through the filter . However, it must be understood that if the pressure differential increases so does 20 the venturi effect and thus the flow rate across the screen which helps to clean the screen.
The second advantage is the migration of the sediment downwardly under gravity which is assisted by the positive venturi flow. The migration downward under gravity towards and into the sump and venturi return , greatly enhances the effectiveness of the sediment removal without associated loss of fluids stream .
In another preferred embodiment the sump has a portion which is removable for cleaning purposes . For example , the removable portion may be a cartridge . It may be made of any suitable material and will depend upon the function and environment in which it is to be used . For example, in applying the filtering device to engines and associated services, it is important to appreciate that the considerably hot working environment will make certain materials unsuitable.
In another preferred embodiment of the invention, the cartridge should be placed so that it is adjacent to the hollow body . This arrangement has two distinct advantages .
The first is to minimise the loss of any fluids which may still be in the hollow body . The other advantage is that close location enhances the venturi circulation and ensures that it will be at its most effective .
DESCRIPTION OF THE DRAWINGS
The invention will now be illustrated by reference to the accompanying drawings in which:
Figure 1 is a plan view of the hollow body of the invention .
Figure 2 is one side view of the hollow body of Figure 1. - Figure 3 is the other side view of the hollow body of Figure 1.
Figure 4 is an underneath view of the hollow body of Figure 1.
Figure 5 is a cross-sectional view of the hollow body of Figure 1.
Figure 6 is one side view of the sump of the invention .
Figure 7 is the other side view of the sump of Figure 6.
Figure 8 is a cross-sectional view of the sump of Figure 6.
A filtering device is shown in Figures 1 to 7 comprising a hollow body 1 of generally cylindrical shape having an inlet 2 and an outlet 3. A screen mesh 4 is disposed in the hollow body 1 and retained to prevent mesh 4 moving in the direction of the flow of the fluids stream. The inlet 2 and outlet 3 have flanged ends to permit ready attachment to radiator hoses used in engines . As such the device can be easily located in the, cooling system of vehicles .
The hollow body 1 is also provided with tubes 5 and 6 which protrude 5 tangentially from the cylindrical shape of the hollow body 1. Mesh 4 is positioned obliquely in the hollow body 1 to define an upstream portion and a downstream portion of the hollow body. Tube 5 is located in the upper area of the downstream portion whilst tube 6 is located in the upstream portion, particularly in the upper area .
o Hoses (not shown) are connected to tubes 5 and 6 respectively and their other free ends are connected to inlet 8 and outlet 9 respectively of sediment separating sump 7. Sump 7 includes a secondary filter 10 which separates the sediment from the partial stream which circulates between tubes 5 and 6. This sump may be a cartridge which can be readily removed and , if necessary, renewed .
In operation the fluids stream enters the hollow body 1 through inlet 2. The mesh 4 tends to decrease the velocity of the stream causing the formation of high pressure area immediately before the mesh 4. Immediately downstream of the mesh 4, a lower pressure area is therefore formed . As tube 5 is located in the high pressure area where the sediment separated by the mesh 4 gravitates, and communicates via a sump to tube 6 located in the lower pressure area, a venturi effect is established . A partial fluids stream is induced to flow through sump 7 and after separation of the sediment in the sump 7, through tube 6 into the downstream portion of the hollow body 1.
The higher the pressure in the upstream portion of the hollow body 1, the larger the venturi effect and the effectiveness of the filter device of the, invention.
The sump is similar in description to the hollow body except that the two ends of the generally cylindrically shaped body are sealed .

Claims

The claims defining the Invention are as follows:
1. A device for filtering a fluids stream comprising a hollow body having an inlet and an outlet for the fluids stream, a filter means disposed in the hollow body which substantially traverses the flow path of the fluids stream to define an upstream portion and a downstream portion of the hollow body, and sediment separating means to remove sediment gravitating towards a lower area of the upstream portion of the hollow body, the sediment separating means including (a) an inlet located in the lower area of the upstream portion to remove a partial stream of the fluids stream in which sediment is entrained, (b) a sump means to receive the partial stream and substantially separate the sediment from the partial stream, and (c) an outlet to return the partial stream from the sump means into the downstream portion of the hollow body.
2. A device according to claim 1 wherein the outlet of the sediment separating means is located in an upper area of the downstream portion of the hollow body.
3. A device according to claim 1 wherein the filter means traverses the entire flow path of the fluids stream.
4. A device according to claim 1 wherein the filter means is inclined at an angle towards the direction of the fluid stream.
5. A device according to claim 1 wherein the filter means is a wire screen mesh.
6. A device according to claim 1 wherein the sump means is removable from the sediment separation means .
7. A device substantially as herein before described with reference to the accompanying drawings.
PCT/AU1990/000336 1989-08-08 1990-08-08 Mechanism for removing solid particles from a liquid-circulating system WO1991001797A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU61502/90A AU652720B2 (en) 1989-08-08 1990-08-08 Mechanism for removing solid particles from a liquid-circulating system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPJ5668 1989-08-08
AUPJ566889 1989-08-08
AUPJ7789 1989-12-11
AUPJ778989 1989-12-11

Publications (1)

Publication Number Publication Date
WO1991001797A1 true WO1991001797A1 (en) 1991-02-21

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1467420A (en) * 1966-02-04 1967-01-27 Pre-filter which can be cleaned in operation
FR1575877A (en) * 1968-06-11 1969-07-25
DE1476333A1 (en) * 1964-11-09 1969-07-31 Barnard Charles A Fluid filters in motor vehicles
FR1590917A (en) * 1967-11-11 1970-04-20
FR2061292A7 (en) * 1969-09-10 1971-06-18 Cillichemie A filtration device for wall mounted pipe work
AU3868778A (en) * 1978-05-17 1980-02-07 Mika H J Radiator pre-filter
JPS61103510A (en) * 1984-10-25 1986-05-22 Mitsubishi Electric Corp Filter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1476333A1 (en) * 1964-11-09 1969-07-31 Barnard Charles A Fluid filters in motor vehicles
FR1467420A (en) * 1966-02-04 1967-01-27 Pre-filter which can be cleaned in operation
FR1590917A (en) * 1967-11-11 1970-04-20
FR1575877A (en) * 1968-06-11 1969-07-25
FR2061292A7 (en) * 1969-09-10 1971-06-18 Cillichemie A filtration device for wall mounted pipe work
AU3868778A (en) * 1978-05-17 1980-02-07 Mika H J Radiator pre-filter
JPS61103510A (en) * 1984-10-25 1986-05-22 Mitsubishi Electric Corp Filter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, C-374, page 148; & JP,A,61 103 510 (MITSUBISHI ELECTRIC CORP), 22 May 1986. *

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