AU2005212538A1

AU2005212538A1 - Apparatus for holding and anchoring refractory concrete type linings

Info

Publication number: AU2005212538A1
Application number: AU2005212538A
Authority: AU
Inventors: Graham Miller
Original assignee: ANTEC ENGINEERING Pty Ltd
Current assignee: Antec Group Pty Ltd
Priority date: 2004-02-18
Filing date: 2005-02-18
Publication date: 2005-08-25
Anticipated expiration: 2025-02-18
Also published as: AU2005212538B2

Description

WO 2005/078368 PCT/AU2005/000201 1 APPARATUS FOR HOLDING AND ANCHORING REFRACTORY CONCRETE TYPE LININGS This invention relates to refractory concrete type linings for furnaces and in particular, 5 relates to the component devices or apparatus for holding and anchoring the lining to the surface of the furnace. BACKGROUND OF THE INVENTION 10 Although the following description refers generally to the utilisation of a component device for anchoring a refractory concrete type lining to the surface of a furnace, pipes or the like, the anchoring device can also find utility in any situation where concrete type linings are required to be applied to similar or other type surfaces. Therefore, reference to refractory concrete type linings is also meant to encompass any similar material where, by 15 suitable modification if necessary, the invention can also be utilised. Such refractory linings are used in industry for a variety of reasons including thermal insulation, abrasion resistance and general steelwork protection for vessel components in a variety of process applications. 20 Due to harsh conditions within a furnace, the linings need to be replaced as they deteriorate over time. The concrete type linings are generally constructed with the use of individual anchors which are fitted to the internal wall surface of a furnace or on the outside surfaces of pipes. 25 In some cases, the individual anchors are welded to the internal surface of the furnace or outside surface of the pipes and need to be removed and replaced when it is time to replace the lining. It has been found that it is inconvenient to remove and install the welded anchors and it would be advantageous to provide an anchor apparatus which 30 enabled the lining to be applied and anchored more efficiently.

WO 2005/078368 PCT/AU2005/000201 2 OBJECT OF THE INVENTION The present invention has therefore been conceived out of the need to provide a means whereby thin refractory concrete type linings can be adhered to surfaces of furnaces, pipes 5 or the like utilising anchor apparatus which provides greater efficiency in applying the anchoring apparatus thereto. At the very least, the invention provides an alternative to presently known anchors for applying such refractory concrete type linings. DISCLOSURE OF THE INVENTION 10 According to the present invention there is provided an anchor apparatus for refractory concrete type linings, said apparatus being used as one of a plurality of anchor apparatuses to adhere said refractory concrete type linings to a surface of furnace, pipe or the like, said apparatus including an elongate base portion adapted to be fixed to the surface to which 15 the lining is to be applied, wherein there are a plurality of tabs projecting from the base, said tabs being spaced apart along the length of the base portion, said tabs and base portion being adapted to be encased by said lining. Preferably, the plurality of tabs are evenly spaced along the length of the base portion. 20 The tabs preferably project at an angle other than perpendicular to the surface to which the base portion is fixed. Preferably, adjacent tabs project at different angles. In the preferred form, the tabs project at an angle of 45 degrees to the perpendicular with adjacent tabs projecting at an angle 90 degrees to the adjacent tab. The tabs can also project at angles within the range of 15 to 70 degrees to the perpendicular. 25 Preferably, the tabs are flat and planar. In the preferred form, the tabs are wider at their free ends than at their ends connecting the base portion. Preferably, the tabs are generally shaped as a so-called dovetail shape. The tabs can also preferably be of parallel width. In either case, the tabs may be solid in shape or alternatively the tabs may be slotted so that 30 they have two or more fingers. Preferably, the base portion is welded to the surface.

WO 2005/078368 PCT/AU2005/000201 3 Preferably the plurality of anchor apparatuses are welded to the surface in rows or the like. BRIEF DESCRIPTION OF THE DRAWINGS 5 Preferred embodiments of the present invention will now be described with reference to the drawings in which: Fig. 1 is a side view of an anchor apparatus according to preferred embodiment, 10 Fig. 2 is a plan view of the anchor apparatus of Fig. 1, Fig. 3 is a plan view of a number of the anchor apparatus applied to a surface, s15 Fig. 4 is a cutaway cross sectional view of the plurality of anchor apparatuses applied to the surface with a refractory lining applied thereto, Fig. 5 is a cutaway cross sectional view of a plurality of anchor apparatuses applied to the surface with a refractory lining applied thereto, each anchor apparatus showing a different 20 profile, and Fig. 6 is 5 is a side view of an anchor apparatus according to a further preferred embodiment wherein the tabs of the apparatus have slots. 25 BEST MODE OF CARRYING OUT THE INVENTION Referring generally to the drawings, there is illustrated an anchor device 10 which is for use with refractory concrete type linings. A number of the devices 10 are welded to a furnace wall 11 (or surface of a pipe) and a refractory type lining 12 (Fig. 4 and 5) is 30 applied to the wall 11 over the devices 10.

WO 2005/078368 PCT/AU2005/000201 4 The device 10 has a thin elongate base portion 13 to which a number of tabs 14 project therefrom. The tabs 14 are dovetail shaped and project outwardly from the base portion 13 at an angle of 45 degrees to the plane of the base portion 13. It is seen from the drawings that the adjacent tabs 14 project to opposite sides of the plane of the base 5 portion 13 and are evenly spaced apart along the length of the device 10. A number of the devices 10 are fitted to the furnace wall 11, the devices being welded thereto as seen in Fig. 3. The tabs 14 are projecting from the surface of the wall 11 and after the devices 10 are installed on the wall 11, the refractory concrete type lining is 10 applied to the wall 11. Naturally, the lining can be a single or multilayered lining, ie with more than two layers, as required for each type of installation. The foregoing describes only some embodiments of the present invention, and modifications obvious to those skilled in the art can be made thereto without departing 15is from the scope of the present invention. For example, the number, angle, shape and positioning of the tabs can vary from that described in the preferred embodiment, for example as shown specifically in Fig 5, where three different profiles are shown. The tabs can project at angles within the range of 15 to 20 70 degrees to the perpendicular and may be generally flat over a greater portion of their length as shown in the outer examples 14 and 141, or have a radius of curvature as shown in the middle example 142. As shown in Fig 6, the tab 14 3, as distinct from tab 14 in Fig. 1, has a slot or cut away portion so that the tab presents with a pair of fingers rather than as a solid shape.

Claims

1. An anchor apparatus for refractory concrete type linings, said apparatus being used as one of a plurality of anchor apparatuses to adhere said refractory 5 concrete type linings to a surface of furnace, pipe or the like, said apparatus including an elongate base portion adapted to be fixed to the surface to which the lining is to be applied, wherein there are a plurality of tabs projecting from the base, said tabs being spaced apart along the length of the base portion, said tabs and base portion being adapted to be encased by said lining. 10

2. An anchor apparatus according to claim 1, wherein the plurality of tabs are evenly spaced along the length of the base portion.

3. An anchor apparatus according to claim 2, wherein the tabs preferably project at an angle other than perpendicular to the surface to which the base portion is fixed. 15

4. An anchor apparatus according to claim 3, wherein adjacent tabs project at different angles.

5. An anchor apparatus according to claim 4, wherein the tabs project at an angle of 45 degrees to the perpendicular with adjacent tabs projecting at an angle 90 degrees to the adjacent tab. 20

6. An anchor apparatus according to claim 4, wherein the tabs project at angles within the range of 15 to 70 degrees to the perpendicular.

7. An anchor apparatus according to any one of the previous claims, in which the tabs are flat and planar.

8. An anchor apparatus according to claim 7, wherein the tabs are wider at their 25 free ends than at their ends connecting the base portion. WO 2005/078368 PCT/AU2005/000201 6

9. An anchor apparatus according to claim 8, wherein the tabs are generally shaped in a dovetail shape.

10. An anchor apparatus according to claim 7, wherein the tabs are of parallel width. 5

11. An anchor apparatus according to any one of claims 7 to 10, wherein the tabs have a slot or cutaway portion so that the tabs have two or more fingers.

12. An anchor apparatus according to any one of the preceding claims, in which the base portion is welded to the surface.

13. An anchor apparatus according to claim 12, wherein the plurality of anchor 10 apparatuses are welded to the surface in rows or the like.

14. An anchor apparatus substantially as hereinbefore described with reference to the accompanying drawings.