Wear resistant transfer or distribution chutes

Patent metadata

Field	Value
Publication number	US-11117746-B2
Application number	US-201816642237-A
Country	US
Kind code	B2
Filing date	Aug 28, 2018
Priority date	Aug 28, 2017
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

A transfer or distribution chute for conveying bulk material by gravity flow includes an elongated chute casing defining a flow path for bulk material and a wear-resistant lining arrangement covering at least part of a flow path facing an upper side of the elongated chute casing. The wear-resistant lining arrangement includes a perforated plate affixed to the chute casing and has a plurality of perforations through which wear-resistant inserts having a body and an enlarged base are fitted in the perforations from a side opposite the flow path, such that their body protrudes through the perforation within the flow path, and their enlarged base abuts the borders of the perforation from the side opposite the flow path on one side and is held in place by the chute casing on the other side.

First claim

The invention claimed is:

1. A transfer or distribution chute for conveying bulk material by gravity flow, the transfer or distribution chute comprising:
an elongated chute casing defining a flow path for said bulk material, and a wear-resistant lining arrangement covering at least part of a flow path facing an upper side of the elongated chute casing, wherein said wear-resistant lining arrangement comprises a perforated plate affixed to the chute casing and having a plurality of perforations disposed in the perforated plate through which wear-resistant inserts comprising a body and an enlarged base are fitted in the perforations from a side opposite the flow path such that their body protrudes through the perforations within the flow path and their enlarged base abuts the borders of the perforations from the side opposite the flow path on one side and their enlarged base is held in place by the chute casing on the other side.

2. The transfer or distribution chute as claimed in claim 1 , wherein the perforations in the perforated plate are round, oval, polygonal, or semi-lunar.

3. The transfer or distribution chute as claimed in claim 1 , wherein the body of the wear-resistant inserts has a rectangular, tapered, or triangular shaped cross section perpendicular to a base of the body, and a flat, concave, or convex end opposite the base.

4. The transfer or distribution chute as claimed in claim 1 , wherein the wear-resistant inserts is made of or comprises technical ceramics, alumina ceramics, SiC ceramics, or Si 3 N 4 ceramics, white cast iron, wear-resistant steel, or hardfacing material.

5. The transfer or distribution chute as claimed in claim 1 , wherein the wear-resistant inserts have an average diameter or height of about 20 to about 200 mm.

6. The transfer or distribution chute as claimed in claim 1 , wherein the minimum distance between two adjacent perforations is from about 0.1 to about 10 times the average diameter of the perforation.

7. The transfer or distribution chute as claimed in claim 1 , wherein the perforations in the perforated plate are arranged in parallel rows, either aligned or off-set relative to each other.

8. The transfer or distribution chute as claimed in claim 7 , wherein the parallel rows are oriented at an angle from 0 to 90° relative to the flow path.

9. The transfer or distribution chute as claimed in claim 7 , wherein two adjacent parallel rows are off-set relative to each other by half the distance between the centers of two adjacent perforations.

10. The transfer or distribution chute as claimed in claim 1 , wherein the perforations in the perforated plate have different sizes.

11. A method for manufacturing a transfer or distribution chute as claimed in claim 1 , the method including the following steps:
(a) preparing a wear-resistant lining arrangement by
i. providing a perforated plate having a plurality of perforations, and
ii. inserting wear-resistant inserts in each perforation from the side opposite the flow path, such that they are abutting the perforated plate with their enlarged base, and

(b) assembling the transfer or distribution chute by affixing an elongated chute casing to the wear-resistant lining arrangement by attaching the perforated plate to the elongated chute casing.

12. The method as claimed in claim 11 , wherein the insertion in step (a).ii is done with the perforated plate being turned flow-path-side down.

13. A method for repairing a transfer or distribution chute as claimed in claim 1 , the method including the following steps:
(a) disassembling the transfer or distribution chute by detaching and removing the elongated chute casing from the wear-resistant lining arrangement by:
i. removing any worn or broken or all wear-resistant inserts from the wear-resistant lining assembly, and
ii. inserting new wear-resistant inserts in each empty perforation from the side opposite the flow path, such that they are abutting the perforated plate with their enlarged base, and

(b) reassembling the transfer or distribution chute by affixing the elongated chute casing to the wear-resistant lining arrangement by attaching the perforated plate to the elongated chute casing.

14. The method as claimed in claim 13 , wherein the insertion in step (a).ii is done with the perforated plate being turned flow-path-side down.

Assignees

• Wurth Paul Sa

Inventors

• Biehler Eric
• De Gruiter Christian
• Tockert Paul
• Aldegani Fabien

Classifications

• B65G11/166 Primary

  for bulk · CPC title

• B65G2207/48

  Wear protection or indication features · CPC title

• B65G11/026 Primary

  for bulk · CPC title

• B65G2201/04

  Bulk · CPC title