GB2376731A - Abrasion resistant tile for lining ductwork - Google Patents
Abrasion resistant tile for lining ductwork Download PDFInfo
- Publication number
- GB2376731A GB2376731A GB0115311A GB0115311A GB2376731A GB 2376731 A GB2376731 A GB 2376731A GB 0115311 A GB0115311 A GB 0115311A GB 0115311 A GB0115311 A GB 0115311A GB 2376731 A GB2376731 A GB 2376731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- abrasion resistant
- tile
- ductwork
- resistant tile
- insert
- 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.)
- Withdrawn
Links
- 238000005299 abrasion Methods 0.000 title claims abstract description 61
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000013016 damping Methods 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 4
- 210000005069 ears Anatomy 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- SWECWXGUJQLXJF-BTJKTKAUSA-N Dimetindene maleate Chemical compound OC(=O)\C=C/C(O)=O.CN(C)CCC=1CC2=CC=CC=C2C=1C(C)C1=CC=CC=N1 SWECWXGUJQLXJF-BTJKTKAUSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005552 hardfacing Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
Classifications
-
- 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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/002—Means for preventing rotation of screw-threaded elements
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/025—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread specially designed to compensate for misalignement or to eliminate unwanted play
Abstract
An abrasion resistant tile (11) for lining ductwork (27), which abrasion resistant tile comprises a base layer (12) provided with a layer of abrasion resistant material (13) characterized by<BR> ```a blind bore (14) and an insert (15) disposed therein for receiving a fixing (20) by which said abrasion resistant tile (11) may be mounted on ductwork (27).
Description
<Desc/Clms Page number 1>
Abrasion Resistant Tile for lining Ductwork
This invention relates to an abrasion resistant tile for lining ductwork, an abrasion resistant unit for lining ductwork and ductwork when lined with said abrasion resistant unit.
Many engineering processes involve passing an abrasive material through a duct. Typically such processes are found in the coke and steel making industries and in the chemical engineering industry.
In order to increase the longevity of the ductwork it is common to line the ductwork, which is typically made of mild steel, with abrasion resistant tiles. Typically such abrasion resistant tiles comprise a 12mm thickness of mild steel covered with a 7mm thick layer of hardfacing comprising an abrasion resistant alloy.
The abrasion resistant tiles, which are typically squares having a side between 150mm and 300mm, are each individually attached to the ductwork by a steel bolt the head of which is accommodated in a countersink in the abrasion resistant tile and the shank of which passes through a bore in the remainder of the abrasion resistant tile and projects from the back thereof. In use, the shank is passed through a hole in the ductwork which is to be lined and held in place by a nut.
Whilst such abrasion resistant tiles do indeed increase the longevity of the ductwork it is not unusual to find that isolated abrasion resistant tiles become dislodged from the ductwork long before the abrasion resistant material has been worn away. It is a matter of conjecture why these abrasion resistant tiles become dislodged.
The present invention aims to reduce this problem.
According to the present invention there is provided an abrasion resistant tile for lining ductwork, which abrasion resistant tile comprises a base layer (typically of steel) provided with a layer of abrasion resistant material characterized by
<Desc/Clms Page number 2>
a blind bore and an insert disposed therein for receiving a fixing by which said abrasion resistant tile may be mounted on ductwork.
Preferably, the blind bore does not extend through the entire thickness of the base layer.
Advantageously, said insert comprises a disk having an elongate aperture therein.
Preferably, said aperture is rectangular although it could also be elliptical.
Advantageously, said insert is provided with at least one leg which, in use, extends between said disk and the extremity of the blind bore.
Preferably said disk and said at least one leg are cast together.
Advantageously, said insert is welded to said base layer.
In order to reduce noise the base layer may be provided with a layer of acoustic damping material, for example a resilient elastomeric material such as rubber with a thickness of typically 6mm to lOmm. If desired the base layer may also be provided with a layer of thermally insulating material in place or, or in addition to, the acoustic damping material.
The present invention also provides an abrasion resistant unit which comprises an abrasion resistant tile in accordance with the present invention and a fixing therefor.
Preferably said fixing comprises a bolt which comprises a shank and a head which, in one position, can pass through the elongate aperture in said insert, but which, when rotated relative to said insert, cannot be withdrawn therefrom.
Advantageously, said fixing further comprises a bolt retainer for inhibiting relative rotation between said bolt and said insert.
Preferably, said bolt retainer comprises a base having a hole to accommodate the shank of said bolt and
<Desc/Clms Page number 3>
at least one ear extending therefrom.
Advantageously, said fixing further comprises a washer and a nut.
The present invention also provides ductwork when lined with abrasion resistant units in accordance with the present invention.
<Desc/Clms Page number 4>
For a better understanding of the present invention reference will now be made, by way of example, to the accompanying drawings, in which :-
Figure 1 is an exploded view showing an abrasion resistant tile in accordance with the present invention mounted on the wall of a chute ;
Figure 2 is a scrap view looking in the direction of the arrow II in Figure 1: and
Figure 3 is a section taken on line III-III of Figure 2.
Referring to the drawings there is shown an abrasion resistant tile which is generally identified by the reference numeral 11.
The abrasion resistant tile 11 comprises a base layer 12 of mild steel about 12mm in thickness covered with a layer 13 of abrasion resistant material about 7mm in thickness.
The abrasion resistant material comprises a chromium carbide alloy sold under the Trademark Triten T200X which is bulk welded to the base layer 12.
A blind bore 14 is drilled in the base layer 12 and, as can be clearly seen from Figure 3 terminates in the base layer 12.
An insert 15 comprising a disk 16 provided with a pair of legs 17 and 18 of square cross-section and an aperture 19 of rectangular cross-section is disposed in the blind bore 14 and is retainer therein by a continuosf spot weld 34 made between the periphery of the disk 16 and the base layer 12.
Abrasion resistant tiles similar to the abrasion resistant tile 11 thusfar described can be packed side by side for transport and shipped to site with a box containing sets of fixings which will now be described.
In particular, each set of fixings comprises: a bolt 20 which is'T'shape in side elevation, is made from mild steel, and has a shank 21 and a head 22; a bolt retainer 23;
<Desc/Clms Page number 5>
a square washer 24; a spring washer 25; and a nut 26.
In use, when it is desired to line ducting 27 with an abrasion resistant tile 11 a hole 28 is drilled in the ducting 27. The head 22 of the bolt 20 is then aligned with the aperture 19 and pushed therethrough.
Once the head 22 has passed the disk 16, the bolt 20 is rotated clockwise until its leading edges engage the legs 17 and 18. In this position the head 22 is at substantially 900 to the axis of the aperture 19.
The bolt retainer 23 is then slid onto the shank 21 of the bolt 20. The bolt retainer 23 comprises a base 29 having a hole 30 and two ears 31 and 32 which project from the ends of the base 29 in a direction perpendicular to the plane thereof.
The bolt retainer 23 is rotated until the ears 31 and 32 enter the aperture 19. In this position the base 29 of the bolt retainer 23 abuts the disk 16 whilst the ears 31 and 32 project through the aperture 19 and lie to either side of the head 22 of the bolt 20 thereby preventing the bolt 20 being rotated into alignment with the aperture 19. This arrangement serves to prevent the abrasion resistant tile 11 becoming separated from the bolt 20.
If desired a tight fitting rubber grommet (not shown) may be rolled along the shank 21 of the bolt 20 to inhibit the bolt retainer 23 inadvertently falling off the bolt 20 during installation and this rubber grommet can also help reduce galvanic reaction.
The shank 21 is then passed through the hole 28. The square washer 24, spring washer 25 and nut 26 are then fitted and the nut 26 tightened to the desired torque.
The free end of the shank 21 is provided with a slot 33 which indicates the orientation of the head 22 and the bolt 20 and also allows the bolt 20 to be restrained from rotation (if required) while the nut 26 is being
<Desc/Clms Page number 6>
tightened.
Various modifications to the arrangement described are envisaged, for example the legs 17 and 18 may be individually attached to the disk 16. Preferably, however, the disk 16 and the legs 17 and 18 are made as a one piece casting.
It should be appreciated that the legs 17 and 18 could be dispensed with entirely since the bolt retainer 23 will prevent the bolt 20 rotating in any event.
However, the legs 17 and 18 are preferred both because they act as spacers to support the disk 16 in an appropriate position whilst it is being welded in place and because they serve to locate the head 22 of the bolt 20 in a position which facilitates insertion of the bolt retainer 23.
If desired, the base layer 12 may be provided with a layer of acoustic damping and/or thermally insulating material.
Although the arrangement described with reference to the drawings is much preferred, the blind bore 14 could extend through the entire thickness of the base layer 12 and could even penetrate the layer 13 of abrasion resistant material if desired-although this would negate the utility of part of the thickness of the abrasion resistant material.
Abrasion resistant units in accordance with the present invention find utility in lining all forms of ductwork including chutes and hoppers. They may also be used for protecting drag lines and loading buckets.
<Desc/Clms Page number 7>
Reference Numerals:
34 spot welds
33 slot
32 ear
31 ear
30 hole
29 base
28 hole
27 ducting
26 nut
25 spring washer
24 square washer
23 bolt retainer
22 head
21 shank
20 bolt
19 elongate aperture
18 leg
17 leg
16 disk
15 insert
14 blind bore
13 layer
12 base layer
11 abrasion resistant tile
Claims (14)
- Claims :- 1. An abrasion resistant tile for lining ductwork, which abrasion resistant tile comprises a base layer provided with a layer of abrasion resistant material characterized by a blind bore and an insert disposed therein for receiving a fixing by which said abrasion resistant tile may be mounted on ductwork.
- 2. An abrasion resistant tile as claimed in Claim 1, wherein the blind bore does not extend through the entire thickness of the base layer.
- 3. An abrasion resistant tile as claimed in Claim 1 or 2, wherein said insert comprises a disk having an elongate aperture therein.
- 4. An abrasion resistant tile as claimed in Claim 3, wherein said aperture is rectangular.
- 5. An abrasion resistant tile as claimed in Claim 3 or 4, wherein said insert is provided with at least one leg which, in use, extends between said disk and the extremity of the blind bore.
- 6. An abrasion resistant tile as claimed in Claim 5, wherein said disk and said at least one leg are cast together.
- 7. An abrasion resistant tile as claimed in any preceding Claim, wherein said insert is welded to said base layer.
- 8. An abrasion resistant tile as claimed in any of Claims 1 to 7, wherein the base layer of said abrasion resistant tile is provided with a layer of acoustic damping material and/or thermal insulating material.
- 9, An abrasion resistant unit for lining ductwork, which abrasion resistant unit comprises an abrasion resistant tile as claimed in any preceding Claim and a fixing therefore.
- 10. An abrasion resistant unit for lining ductwork, which abrasion resistant unit comprises an abrasion resistant tile as claimed in Claim 3 or any claim<Desc/Clms Page number 9>dependent directly or indirectly thereon, and a fixing therefore which fixing comprises a bolt which comprises a shank and a head which, in one position, can pass through the elongate aperture in said insert, but which, when rotated relative to said insert, cannot be withdrawn therefrom.
- 11. An abrasion resistant unit as claimed in Claim 10, wherein said fixing includes a bolt retainer for inhibiting relative rotation between said bolt and said insert.
- 12. An abrasion resistant unit as claimed in Claim 11, wherein said bolt retainer comprises a base having a hole to accommodate the shank of said bolt and at least one ear extending therefrom.
- 13. An abrasion resistant unit as claimed in Claim 10, 11 or 12, wherein said fixing further comprises a washer and a nut.
- 14. Ductwork when lined with abrasion resistant units as claimed in any of Claims 10 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0115311A GB2376731A (en) | 2001-06-22 | 2001-06-22 | Abrasion resistant tile for lining ductwork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0115311A GB2376731A (en) | 2001-06-22 | 2001-06-22 | Abrasion resistant tile for lining ductwork |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0115311D0 GB0115311D0 (en) | 2001-08-15 |
| GB2376731A true GB2376731A (en) | 2002-12-24 |
Family
ID=9917169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0115311A Withdrawn GB2376731A (en) | 2001-06-22 | 2001-06-22 | Abrasion resistant tile for lining ductwork |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2376731A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2851556A1 (en) * | 2003-02-25 | 2004-08-27 | Sagefa | Cereals transfer device, has detachable wall reversibly closed longitudinal opening of tubular part and integrated to opening, and longitudinal filling reversibly integrated to interior of tubular part |
| US7361411B2 (en) | 2003-04-21 | 2008-04-22 | Att Technology, Ltd. | Hardfacing alloy, methods, and products |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3624344A (en) * | 1968-08-02 | 1971-11-30 | Carborundum Co | Attachment of nonmetallic articles to metallic substrates |
| US3747291A (en) * | 1971-08-13 | 1973-07-24 | Coors Porcelain Co | Wear resistant assembly |
| US4705424A (en) * | 1985-06-13 | 1987-11-10 | Ksm Fastening Systems Inc. | Stud system for securing abrasion resistant members |
| JPH0650379A (en) * | 1992-07-30 | 1994-02-22 | Bridgestone Corp | Vibration control device |
| US6129967A (en) * | 1999-06-18 | 2000-10-10 | Tandem Products, Inc. | Composite wear structure and method of securing ceramic tiles therein |
-
2001
- 2001-06-22 GB GB0115311A patent/GB2376731A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3624344A (en) * | 1968-08-02 | 1971-11-30 | Carborundum Co | Attachment of nonmetallic articles to metallic substrates |
| US3747291A (en) * | 1971-08-13 | 1973-07-24 | Coors Porcelain Co | Wear resistant assembly |
| US4705424A (en) * | 1985-06-13 | 1987-11-10 | Ksm Fastening Systems Inc. | Stud system for securing abrasion resistant members |
| JPH0650379A (en) * | 1992-07-30 | 1994-02-22 | Bridgestone Corp | Vibration control device |
| US6129967A (en) * | 1999-06-18 | 2000-10-10 | Tandem Products, Inc. | Composite wear structure and method of securing ceramic tiles therein |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2851556A1 (en) * | 2003-02-25 | 2004-08-27 | Sagefa | Cereals transfer device, has detachable wall reversibly closed longitudinal opening of tubular part and integrated to opening, and longitudinal filling reversibly integrated to interior of tubular part |
| US7361411B2 (en) | 2003-04-21 | 2008-04-22 | Att Technology, Ltd. | Hardfacing alloy, methods, and products |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0115311D0 (en) | 2001-08-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |