Wear lining element and an arrangement for the attachment of such
The invention concerns an arrangement for the joining and attachment of a wear lining element ( 1 ) onto a surface that is subject to wear, a supporting surface ( 5 ) of a supporting construction ( 2 ), comprising attachment means ( 9 ) that when anchored in the wear lining element are each one intended to be inserted into attachment holes ( 10 ) arranged in the supporting construction whereby the wear lining element is held fastened against the supporting surface by means of supplementary fastening means ( 16 ) that are associated with the attachment means positioned to interact with the tensioning surface ( 11 ) located on the opposite side of the supporting surface. For rapid and safe fixing, the attachment means ( 9 ) comprises a holder ( 13 ) fixed attached to the wear lining element ( 1 ), a guide ( 14 ) designed to guide the wear lining element into place against the supporting surface through interaction with a hole wall in the attachment holes ( 10 ) of the supporting construction, a mounting ( 15 ) designed to hold the wear lining element fastened against the supporting surface ( 5 ) through interaction with the tensioning surface ( 11 ) of the supporting construction and fixing and locking means ( 12 ) that allow the guide and the mounting to be held in place in a manner that allows exchange, supported by the holder. The invention concerns also a wear lining element intended to be mounted on the inner surface of a rotary grinding drum.
1. An arrangement for the attachment of a wear lining element onto a surface that is exposed to wear, a supporting surface of a supporting construction, comprising attachment means that when anchored in the wear lining element are each one intended to be inserted into attachment holes arranged in the supporting construction, whereby the wear lining element is fastened against the supporting surface by means of supplementary fastening means that are associated with the attachment means and positioned to interact with a tensioning surface located on an opposite side of the supporting surface, characterised in that the attachment means comprises a holder fixedly attached to the wear lining element, a guide designed to guide the wear lining element into place against the supporting surface through interaction with a hole wall in the attachment holes of the supporting construction, a mounting designed to hold the wear lining element fastened against the supporting surface through interaction with the tensioning surface of the supporting construction, and fixing and locking means that allow the guide and the mounting, respectively, to be held in place in a manner that allows exchange, supported by the holder.
2. The arrangement according to claim 1 , comprising temporary locking means that make it possible to temporarily lock the wear lining element against the supporting surface of the supporting construction through interaction between the guide and the tensioning surface of the supporting construction.
3. The arrangement according to claim 2 , wherein the temporary locking means comprises a first locking member and a second locking member that act together, the second locking member being arranged at the guide.
4. The arrangement according to claim 3 , wherein the first locking member can be introduced into the second locking member and the locking members are held fixed in a united condition through the influence of a snap device that acts between the members.
5. The arrangement according to claim 1 , wherein the fixing and locking means allows both the guide and the mounting to be united with the holder in a manner that allows them to be removed.
6. The arrangement according to claim 1 , comprising means that can be accessed from the tensioning surface after they have been united with the attachment holes and that allow the guide to be released and removed from the holder.
7. The arrangement according to claim 6 , wherein the means for the release and removal of the guide from the holder comprises a turning means arranged on the guide designed for interaction with a turning tool.
8. The arrangement according to claim 7 , wherein the turning means comprises grips arranged at a free end of the guide designed for interaction with a wrench key.
9. The arrangement according to claim 1 , wherein the fixing and locking means with which the guide and the mounting are held in place by the holder in a manner that allows exchange comprise a threaded joint that acts between the respective parts.
10. The arrangement according to claim 1 , wherein the holder comprises an attachment sheath provided with an internal thread that protrudes from the wear lining element.
11. The arrangement according to claim 1 , wherein the guide is extended and comprises a part that has the form of a stud that is circular and is provided with an external thread that can be united with the holder by screwing, and a circularly cylindrical part that has the form of a peg that narrows in a conical manner towards a free end.
12. The arrangement according to claim 11 , wherein a turning means of the guide is arranged at the free end of the part that has the form of a peg.
13. The arrangement according to claim 1 , wherein the mounting comprises a screw means with the form of a stud that can be screwed into the holder.
14. The arrangement according to claim 1 , wherein the mounting comprises a turning means that allows the mounting to be released from the holder.
15. The arrangement according to claim 14 , wherein the turning means of the mounting is arranged at a free end of the mounting.
16. A wear lining element intended to be mounted on an inner surface of a rotary grinding drum, comprising an arrangement for the uniting and fixing of the type that is specified in claim 1 .
17. The wear lining element according to claim 16 , comprising a bottom of sheet metal with a convex form with a curvature that corresponds to the concave inner surface of the rotary grinding drum, and an upper surface of a wear-resistant material with an irregular form.
18. The wear lining element according to claim 17 , wherein the wear-resistant material comprises one of rubber and an elastomeric material and is united with the bottom through vulcanisation.
19. The wear lining element according to claim 18 , wherein the upper surface has the form of two ridges that are separated by a distance and run parallel to each other and that protrude in towards a centre of the drum, and a part that has the form of a valley and lies at a significantly lower height situated between the two ridges, and in which part having the form of a valley lifting hooks are arranged that are intended for interaction with a hook or similar lifting means that is a component of a lifting accessory.