WO1998037945A1 - Frame arrangement for fastening of adjacent filter bags - Google Patents

Frame arrangement for fastening of adjacent filter bags Download PDF

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Publication number
WO1998037945A1
WO1998037945A1 PCT/SE1998/000321 SE9800321W WO9837945A1 WO 1998037945 A1 WO1998037945 A1 WO 1998037945A1 SE 9800321 W SE9800321 W SE 9800321W WO 9837945 A1 WO9837945 A1 WO 9837945A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
bag
profiles
bags
adjacent
Prior art date
Application number
PCT/SE1998/000321
Other languages
French (fr)
Swedish (sv)
Inventor
Anna Danielsson
Lennart ÅRNELL
Original Assignee
If Luftfilter 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 If Luftfilter Ab filed Critical If Luftfilter Ab
Priority to AU63152/98A priority Critical patent/AU6315298A/en
Publication of WO1998037945A1 publication Critical patent/WO1998037945A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame

Definitions

  • TITLE Frame Arrangement for Fastening of Adjacent Filter Bags.
  • the present invention relates to a frame arrangement for fastening of filter bags which are arranged adjacent each other. These bags have a rectangular cross section in the air-inlet opening and are arranged on list-shaped rectangular bag holders.
  • Air filters of the above kind are well known and have been in use for a long period of time. They consist of adjacently arranged bags with the bag opening facing the flow direction of the air or the gas which is pressed or sucked into the bag and goes out through the walls of the bag and continues further in a cleaned state, wherein large or small dirt particles are caught in the bag walls.
  • the material in these bag walls is usually plastic fibre or glass fibre.
  • the bags are sewn together and shaped as channels in the air flow direction.
  • the walls in each bag do not contact each other and the thread which has formed the channels has a certain length between the walls and its only purpose is to ensure that the walls do not swell out.
  • the inlet openings of the bags for the air are usually rectangular and the bags are fastened to rectangular frames.
  • the longest sides of two adjacent frames with intermediate bag edges are usually riveted together so that the air will not be able to penetrate in between the bags.
  • These frames which are usually metallic, are in turn inserted into an outer metallic frame. To prevent any air leakage, glue is applied between the outer and inner frames thereby creating a tight coupling.
  • the outer frame consists, according to prior art, of a metal profile which is bent into a U-form, whereupon the rectangular bag holders are inserted between the legs of the U from the side, whereupon one of the legs which is longer than the other is bent so that a square is created, which is made permanent by joining the last corner.
  • the outer frame has on its outer side a longitudinal groove or recess which enables the frame with the filter-set to be mounted in a filter house by inserting it from the side in U-profiles in the filter house.
  • the outer filter frame and the bag holders are, as mentioned above, usually made of galvanized metal.
  • the bag holders and the frame can however be made of plastics or wood, in which case the bags are sewn together at the edges of the inlet openings and the bag holders then consist of rods behind the seams between the edges of the bag holders.
  • the object of the air filters is to clean air or gases and they are themselves an instrument in the work for the environment.
  • an environmental problem arises when the filters themselves are to be exchanged.
  • the filters cannot be cleaned and re-used and an appreciable amount of metal waste and bag material will therefore be created when the filters are discarded. Therefore, there has long been a desire to be able to burn the whole filter so that no remains except possibly ash will arise.
  • the outer frame in pairs consists of four profiles which are identical but which in pairs are of differing length, and which are coupled to each other by means of corner parts.
  • the frame profiles at the one inner edge which is on the far side from the air-inlet opening are provided with a longitudinal wing intended to protect the bag material during the sliding insertion into the filter house.
  • the frame profiles according to the invention are hollow and the corner parts have two protrusions at an angle of 90° in relation to each other, which protrusions are intended to be inserted into the cavities of the frame profiles and hold them together by friction or snapping.
  • corner parts which hold together the frame profiles should, according to the invention, have grooves on the outer side, which grooves coincide with the grooves on the outer sides of the frame profiles to facilitate the sliding insertion into the filter house.
  • Fig. 1 in perspective and partly in section shows a filter according to the present invention, in which Fig. 2 shows a section through the outer frame profile, in which
  • Fig. 3 shows a corner part for coupling the frame profiles and in which Fig. 4 in horizontal section shows bag holder profiles with intermediate bags held together by the clamping list.
  • Fig. 1 shows a filter according to the invention with six filter bags 1 arranged adjacent to each other.
  • the bags are in a conventional way held together with threads 2 so that through-flowing channels 3 are formed.
  • the bags 1 have rectangular inlet openings for the air and the edges of these bag openings are fastened in bag holders 4 according to the invention.
  • These bag holders 4 have been inserted into the outer frame 5 from the side.
  • This outer frame 5 consists of four plastic profiles which are identical but which in pairs are of differing lengths, and which are coupled to each other by means of corner parts 6.
  • the bag holders 4, the profiles which make the outer frame 5 and the corner parts 6 are made of combustible plastic material. These will be described in more detail below.
  • the bags 1 themselves are of a conventional type and are not a part of the invention.
  • Fig. 2 shows a section through a profile making the outer frame 5.
  • This profile has been made hollow and the cavities 7 are intended to receive the corner parts 6 for coupling together the profiles 5.
  • a recess 8 has been made on the outer side of the profile 5 to facilitate the insertion of the profile or the whole filter into a filter house.
  • On the inner side of the profile two protrusions 9 and 10 have been made. These protrusions 9 and 10 are intended to clamp against the shorter side of the bag holder 4.
  • the bag 1 the opening of which has been drawn over the bag holder 4 is thereby clamped between the bag holder 4 and the protrusions 9 and 10 and the intermediate wall therebetween.
  • a longitudinal wing 11 has been arranged on the protrusion 10 arranged. This wing 11 is intended to protect the bag 1 when the profile or the outer frame 5 is introduced into a U-shaped holder in the filter house.
  • Fig. 3 shows a corner piece 6 seen from above. It comprises two protrusions 12 which have an angle of 90° to each other and which are intended to be inserted into the cavity 7 in the profiles which make the outer frame 5.
  • the corner parts 6 are preferably made hollow with suitable reinforcing ribs.
  • the width of the protrusions 12 must be such that these protrusions 12 must be pressed with a certain force into the cavities 7 so that a secure connection is created. Some kind of snap arrangement may also be used for a more secure connection.
  • Fig. 4 shows a horizontal section through the vertical part of the bag holder 4 with mounted clamping list 13. As appears from the figure, the bag holders 4 with intermediate bag material 1 are clamped against each other by means of the clamping list 13. This makes a reliable coupling of the bags 1 and the bag holders 4 and prevents any possibility of leakage in the air flow since the clamping list 13 covers the coupling itself.
  • the clamping list 13 has been made of plastics with sufficient elasticity and clamping ability.
  • a frame arrangement for air filters which gives a good aerodynamic flow of the air into the filters has been brought about, which arrangement without the aid of glue and rivets gives a perfect sealing of the filter material to the frame arrangement and which after use can be burned completely with only a remainder of possible ash from the glass fibre material.
  • the filter arrangement is simple to produce, which makes it economical, and it is easy to introduce into a filter house without any risk of damaging the bag material due to the possibility of something catching in the filter material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention relates to a frame arrangement for fastening of adjacent filter bags (1) which have a rectangular section in the air-intake opening. These bags (1) are mounted on a rectangular bag holder (4) at the inlet opening and the bag holders (4) are inserted adjacent to each other in an outer frame (5). The invention is characterized in that the outer frame (5) and the bag holders (4) are made of plastics and that the coupling together has been brought about by means of a clamping list (13) also of plastics, which has been drawn over and holds together two adjacent bag holder sides (4) with intermediate bag edges.

Description

TITLE: Frame Arrangement for Fastening of Adjacent Filter Bags.
TECHNICAL FIELD:
The present invention relates to a frame arrangement for fastening of filter bags which are arranged adjacent each other. These bags have a rectangular cross section in the air-inlet opening and are arranged on list-shaped rectangular bag holders.
PRIOR ART: Air filters of the above kind are well known and have been in use for a long period of time. They consist of adjacently arranged bags with the bag opening facing the flow direction of the air or the gas which is pressed or sucked into the bag and goes out through the walls of the bag and continues further in a cleaned state, wherein large or small dirt particles are caught in the bag walls. The material in these bag walls is usually plastic fibre or glass fibre. To prevent the bags from swelling out due to the air pressure within them and to prevent them from coming into contact with each other so that the air flow from the bags is obstructed, the bags are sewn together and shaped as channels in the air flow direction. However, the walls in each bag do not contact each other and the thread which has formed the channels has a certain length between the walls and its only purpose is to ensure that the walls do not swell out.
The inlet openings of the bags for the air are usually rectangular and the bags are fastened to rectangular frames. The longest sides of two adjacent frames with intermediate bag edges are usually riveted together so that the air will not be able to penetrate in between the bags. These frames, which are usually metallic, are in turn inserted into an outer metallic frame. To prevent any air leakage, glue is applied between the outer and inner frames thereby creating a tight coupling.
The outer frame consists, according to prior art, of a metal profile which is bent into a U-form, whereupon the rectangular bag holders are inserted between the legs of the U from the side, whereupon one of the legs which is longer than the other is bent so that a square is created, which is made permanent by joining the last corner.
The outer frame has on its outer side a longitudinal groove or recess which enables the frame with the filter-set to be mounted in a filter house by inserting it from the side in U-profiles in the filter house.
The outer filter frame and the bag holders are, as mentioned above, usually made of galvanized metal. The bag holders and the frame can however be made of plastics or wood, in which case the bags are sewn together at the edges of the inlet openings and the bag holders then consist of rods behind the seams between the edges of the bag holders.
TECHNICAL PROBLEM:
The object of the air filters is to clean air or gases and they are themselves an instrument in the work for the environment. However, an environmental problem arises when the filters themselves are to be exchanged. The filters cannot be cleaned and re-used and an appreciable amount of metal waste and bag material will therefore be created when the filters are discarded. Therefore, there has long been a desire to be able to burn the whole filter so that no remains except possibly ash will arise.
A problem with older filter types, especially when wooden rods are used behind the seams at the bag edges, is that the air flow will not be aerodynamically correct. As the filter bags in such cases are somewhat narrowed in the opening area, a disturbance of the aerodynamic air flow will be created, which leads to a higher pressure fall than is necessary in the filter and a non-uniform filtering.
THE SOLUTION:
Through the present invention it has been possible to overcome the above disadvantages of the known technique and to solve the problems which are connected therewith by bringing about a frame arrangement for fastening of adjacently arranged filter bags, which filter bags have a rectangular cross section in the air-inlet opening and are arranged on list-shaped rectangular bag-holders and are coupled to each other with their adjacent edges, wherein the bag holders are inserted adjacent to each other in an outer frame, wherein the coupling has been brought about by means of a clamping list which has been drawn over and holds together two adjacent bag holder sides with intermediate bag edges, which frame arrangement is characterized in that the frame profiles are provided with grooves both on the outside for sliding insertion into a filter house and on the inner side for sliding insertion of the bag holders.
According to the invention it is suitable that the outer frame in pairs consists of four profiles which are identical but which in pairs are of differing length, and which are coupled to each other by means of corner parts.
According to the invention, it is important that the frame profiles at the one inner edge which is on the far side from the air-inlet opening are provided with a longitudinal wing intended to protect the bag material during the sliding insertion into the filter house. The frame profiles according to the invention are hollow and the corner parts have two protrusions at an angle of 90° in relation to each other, which protrusions are intended to be inserted into the cavities of the frame profiles and hold them together by friction or snapping.
The corner parts which hold together the frame profiles should, according to the invention, have grooves on the outer side, which grooves coincide with the grooves on the outer sides of the frame profiles to facilitate the sliding insertion into the filter house.
DESCRIPTION OF THE FIGURES:
The invention will in the following be described more in detail with reference to the attached figures in which
Fig. 1 in perspective and partly in section shows a filter according to the present invention, in which Fig. 2 shows a section through the outer frame profile, in which
Fig. 3 shows a corner part for coupling the frame profiles and in which Fig. 4 in horizontal section shows bag holder profiles with intermediate bags held together by the clamping list.
DETAILED DESCRIPTION:
Fig. 1 shows a filter according to the invention with six filter bags 1 arranged adjacent to each other. The bags are in a conventional way held together with threads 2 so that through-flowing channels 3 are formed. The bags 1 have rectangular inlet openings for the air and the edges of these bag openings are fastened in bag holders 4 according to the invention. These bag holders 4 have been inserted into the outer frame 5 from the side. This outer frame 5 consists of four plastic profiles which are identical but which in pairs are of differing lengths, and which are coupled to each other by means of corner parts 6. The bag holders 4, the profiles which make the outer frame 5 and the corner parts 6 are made of combustible plastic material. These will be described in more detail below. The bags 1 themselves are of a conventional type and are not a part of the invention.
Fig. 2 shows a section through a profile making the outer frame 5. This profile has been made hollow and the cavities 7 are intended to receive the corner parts 6 for coupling together the profiles 5. A recess 8 has been made on the outer side of the profile 5 to facilitate the insertion of the profile or the whole filter into a filter house. On the inner side of the profile two protrusions 9 and 10 have been made. These protrusions 9 and 10 are intended to clamp against the shorter side of the bag holder 4. The bag 1 the opening of which has been drawn over the bag holder 4 is thereby clamped between the bag holder 4 and the protrusions 9 and 10 and the intermediate wall therebetween. On the protrusion 10 a longitudinal wing 11 has been arranged. This wing 11 is intended to protect the bag 1 when the profile or the outer frame 5 is introduced into a U-shaped holder in the filter house.
Fig. 3 shows a corner piece 6 seen from above. It comprises two protrusions 12 which have an angle of 90° to each other and which are intended to be inserted into the cavity 7 in the profiles which make the outer frame 5. To minimise the material consumption, the corner parts 6 are preferably made hollow with suitable reinforcing ribs. The width of the protrusions 12 must be such that these protrusions 12 must be pressed with a certain force into the cavities 7 so that a secure connection is created. Some kind of snap arrangement may also be used for a more secure connection. Fig. 4 shows a horizontal section through the vertical part of the bag holder 4 with mounted clamping list 13. As appears from the figure, the bag holders 4 with intermediate bag material 1 are clamped against each other by means of the clamping list 13. This makes a reliable coupling of the bags 1 and the bag holders 4 and prevents any possibility of leakage in the air flow since the clamping list 13 covers the coupling itself. The clamping list 13 has been made of plastics with sufficient elasticity and clamping ability.
By the present invention a frame arrangement for air filters which gives a good aerodynamic flow of the air into the filters has been brought about, which arrangement without the aid of glue and rivets gives a perfect sealing of the filter material to the frame arrangement and which after use can be burned completely with only a remainder of possible ash from the glass fibre material. The filter arrangement is simple to produce, which makes it economical, and it is easy to introduce into a filter house without any risk of damaging the bag material due to the possibility of something catching in the filter material.
The invention is not limited to the above described embodiment and it can be varied in different ways within the scope of the claims.

Claims

CLAIMS :
1. Frame arrangement for fastening adjacently arranged filter bags (1) which filter bags (1) have a rectangular cross section at the air-inlet opening and are arranged on list-formed rectangular bag holders (4) and are coupled together with their adjacent edges, wherein the bag holders (4) are inserted adjacent to each other in an outer frame (5), wherein the coupling has been brought about by means of a clamping list (13) which has been drawn over and holds together two adjacent bag holder sides (4) with intermediate bag edges, c h a r a c t e r i z e d i n that the frame profiles (5) are provided with grooves or recesses (8) on the outer side for sliding insertion into a filter house and on the inner side for sliding insertion of the bag holders (4).
2. Frame arrangement according to claim 1, c h a r a c t e r i z e d i n that the outer frame ( 5 ) consists of four in section identical profiles coupled together by means of corner parts (6).
3. Frame arrangement according to any one of claims 1 or 2, c h a r a c t e r i z e d i n that the frame profiles (5) are provided at the one inner edge (10) which is farthest from the air-inlet opening with a longitudinal wing (11) intended to protect the bag material (1) during the sliding insertion into the filter house.
4. Frame arrangement according to any one of claims 1-3, c h a r a c t e r i z e d i n that the frame profiles (5) are hollow (7) and that the corner parts (6) have two protrusions (12) at an angle of 90┬░ in relation to each other, which protrusions (12) are intended to be inserted into the cavities (7) of the frame profiles and hold these together by friction or snapping.
5. Frame arrangement according to any one of claims 2-4, c h a r a c t e r i z e d i n that the corner parts (6) on the outer side have grooves which coincide with the grooves or recesses (8) on the outer side of the frame profiles (5) .
PCT/SE1998/000321 1997-02-26 1998-02-24 Frame arrangement for fastening of adjacent filter bags WO1998037945A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU63152/98A AU6315298A (en) 1997-02-26 1998-02-24 Frame arrangement for fastening of adjacent filter bags

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9700674A SE520824C2 (en) 1997-02-26 1997-02-26 Frame device for attaching filter bags arranged side by side
SE9700674-6 1997-02-26

Publications (1)

Publication Number Publication Date
WO1998037945A1 true WO1998037945A1 (en) 1998-09-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/000321 WO1998037945A1 (en) 1997-02-26 1998-02-24 Frame arrangement for fastening of adjacent filter bags

Country Status (3)

Country Link
AU (1) AU6315298A (en)
SE (1) SE520824C2 (en)
WO (1) WO1998037945A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999048592A1 (en) * 1998-03-24 1999-09-30 Cenneth Lindkvist A frame device for a ventilation filter and a method for the mounting of a ventilation filter in such a frame device
EP0962722A2 (en) * 1998-06-05 1999-12-08 Saimanen, Matti Bag filter for air-conditioning equipment.
SG160261A1 (en) * 2008-10-07 2010-04-29 Yun Yu Hang Co Ltd Bag type filter structure
US8029585B2 (en) 2005-05-23 2011-10-04 Camfil Ab Pocket filter assembly
WO2011133098A1 (en) * 2010-04-20 2011-10-27 Ultramare Ab Pocket filter assembly
WO2011146013A1 (en) * 2010-05-19 2011-11-24 Primo Sverige Aktiebolag Filter frame arrangement
JP2014018788A (en) * 2012-07-24 2014-02-03 Japan Vilene Co Ltd Bag filter
US20150240420A1 (en) * 2012-11-13 2015-08-27 Valmet Aktiebolag Steel-made yankee cylinder
DE102017008190A1 (en) 2017-08-30 2019-02-28 Josef Bieniek Pocket filter and clamping profile for attaching the filter bag
PL440439A1 (en) * 2022-02-23 2023-08-28 Profplast Spółka Z Ograniczoną Odpowiedzialnością Plastic clip profile for connecting flexible materials, especially filter materials

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873286A (en) * 1973-06-20 1975-03-25 Oscar A Wurtenberg Gas filter assembly
US4325718A (en) * 1981-05-04 1982-04-20 Allis-Chalmers Corporation Snap together pocket filter arrangement
WO1996029138A1 (en) * 1995-03-22 1996-09-26 Scandfilter Ab Gas filter unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873286A (en) * 1973-06-20 1975-03-25 Oscar A Wurtenberg Gas filter assembly
US4325718A (en) * 1981-05-04 1982-04-20 Allis-Chalmers Corporation Snap together pocket filter arrangement
WO1996029138A1 (en) * 1995-03-22 1996-09-26 Scandfilter Ab Gas filter unit

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999048592A1 (en) * 1998-03-24 1999-09-30 Cenneth Lindkvist A frame device for a ventilation filter and a method for the mounting of a ventilation filter in such a frame device
EP0962722A2 (en) * 1998-06-05 1999-12-08 Saimanen, Matti Bag filter for air-conditioning equipment.
EP0962722A3 (en) * 1998-06-05 2002-09-11 Matti Saimanen Bag filter for air-conditioning equipment.
US8029585B2 (en) 2005-05-23 2011-10-04 Camfil Ab Pocket filter assembly
SG160261A1 (en) * 2008-10-07 2010-04-29 Yun Yu Hang Co Ltd Bag type filter structure
US9067159B2 (en) 2010-04-20 2015-06-30 Okr Invest Ab Pocket filter assembly
JP2013525100A (en) * 2010-04-20 2013-06-20 オーケイアール インベスト エービー Pocket filter assembly
WO2011133098A1 (en) * 2010-04-20 2011-10-27 Ultramare Ab Pocket filter assembly
WO2011146013A1 (en) * 2010-05-19 2011-11-24 Primo Sverige Aktiebolag Filter frame arrangement
JP2014018788A (en) * 2012-07-24 2014-02-03 Japan Vilene Co Ltd Bag filter
US20150240420A1 (en) * 2012-11-13 2015-08-27 Valmet Aktiebolag Steel-made yankee cylinder
US9206549B2 (en) * 2012-11-13 2015-12-08 Valmet Aktiebolag Steel-made yankee cylinder
DE102017008190A1 (en) 2017-08-30 2019-02-28 Josef Bieniek Pocket filter and clamping profile for attaching the filter bag
PL440439A1 (en) * 2022-02-23 2023-08-28 Profplast Spółka Z Ograniczoną Odpowiedzialnością Plastic clip profile for connecting flexible materials, especially filter materials

Also Published As

Publication number Publication date
SE9700674D0 (en) 1997-02-26
AU6315298A (en) 1998-09-18
SE9700674L (en) 1998-08-27
SE520824C2 (en) 2003-09-02

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