VSI-crusher feed hopper distribution device

Patent metadata

Field	Value
Publication number	US-11123747-B2
Application number	US-201414900650-A
Country	US
Kind code	B2
Filing date	May 19, 2014
Priority date	Jul 2, 2013
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

A vertical shaft impact crusher feed hopper distribution device arranged for feeding material to be crushed to a rotor of a vertical shaft impact crusher. The feed hopper distribution device is arranged to be mounted in a feed hopper that feeds material to the rotor and includes a supply channel that forwards material from an inlet opening arranged adjacent to an upper end of the supply channel to a hopper bottom opening arranged in a bottom of the feed hopper and communicating with the rotor. The supply channel has a cross-section that widens along at least a portion of the distance from the upper end to a lower end of the supply channel.

First claim

The invention claimed is:

1. A feed hopper distribution device for feeding material to be crushed to a rotor of a vertical shaft impact crusher, the feed hopper distribution device being arranged to be mounted in and to form part of a feed hopper means feeding the material to be crushed to the rotor, the feed hopper means including an inner hopper and an outer hopper, the feed hopper distribution device comprising:
a supply channel arranged for forwarding the material to be crushed from an inlet opening arranged adjacent to an upper end of the supply channel to a hopper bottom opening arranged in a bottom of the inner hopper and communicating with the rotor, the material to be crushed being separable into a first flow and a second flow, the supply channel having a cross-section that widens along at least a portion of the distance from the upper end to a lower end of the supply channel, the feed hopper distribution device being arranged to be mounted inside of the inner hopper and to forward the first flow of the material to be crushed to the rotor via the supply channel and to forward the second flow of the material to be crushed via at least one outlet formed in the inner hopper to a space formed between the inner and outer hoppers, and further to a position at the outside of the rotor; and
an upper hopper portion located on top of the supply channel, the upper hopper portion having a bottom portion and an upper inlet end, wherein the upper hopper portion supports at least one upper throttle plate at the bottom portion, the inlet opening being arranged in the at least one upper throttle plate and being aligned with the hopper bottom opening, the supply channel extending from the at least one upper throttle plate to the inner hopper bottom.

2. The feed hopper distribution device according to claim 1 , wherein the upper hopper portion has a shape of an upwardly open cylinder to which the material to be crushed may be supplied and further forwarded to the supply channel.

3. The feed hopper distribution device according to claim 1 , wherein the supply channel has, at least along a portion thereof, a shape selected from truncated cones, truncated pyramids, and bell-shapes.

4. The feed hopper distribution device according to claim 1 , further comprising an upper inlet end dividing the material to be crushed to flow as the first flow of material to be crushed to the rotor or to flow as the second flow of material to be crushed to the position outside of the rotor.

5. The feed hopper distribution device according to claim 4 , wherein the upper inlet end of the feed hopper distribution device is arranged to be located vertically above a lower end of the at least one outlet.

6. The feed hopper distribution device according to claim 1 , wherein the supply channel is arranged to form a material space together with the inner hopper and an inner hopper bottom of the inner hopper for housing an inner hopper wall of material to be crushed in the feed hopper means.

7. The feed hopper distribution device according to claim 1 , wherein a side wall of the supply channel forms an angle α of 5-30° to the vertical plane.

8. The feed hopper distribution device according to claim 1 , wherein an inner width of the inlet opening, arranged at an upper throttle plate, is smaller than the width of the upper end of the supply channel.

9. A vertical shaft impact crusher comprising:
a rotor arranged in a housing;
a feed hopper means arranged for feeding raw material to be crushed to the rotor, the feed hopper means including an inner hopper and an outer hopper; and
a feed hopper distribution device arranged as part of the feed hopper means, the feed hopper distribution device including a supply channel arranged for forwarding the material to be crushed from an inlet opening arranged adjacent to an upper end of the supply channel to a hopper bottom opening arranged in a bottom of the inner hopper and communicating with the rotor, the material to be crushed being separable into a first flow and a second flow, wherein an upper hopper portion is located on top of the supply channel, the upper hopper portion having a bottom portion and an upper inlet end, wherein the upper hopper portion supports at least one upper throttle plate at the bottom portion, the inlet opening being arranged in the at least one upper throttle plate and being aligned with the hopper bottom opening, the supply channel extending from the at least one upper throttle plate to the inner hopper bottom and having a cross-section that widens along at least a portion of the distance from the upper end to a lower end of the supply channel, the feed hopper distribution device being arranged to be mounted inside of the inner hopper and to forward the first flow of material to be crushed to the rotor via the supply channel and to forward the second flow of material to be crushed via at least one outlet formed in the inner hopper to a space formed between the inner and outer hoppers, and further to a position at the outside of the rotor.

10. A method of crushing material in a vertical shaft impact crusher having a rotor arranged in a housing and a feed hopper means arranged for feeding material to be crushed to the rotor, the method comprising:
providing a feed hopper distribution device including a supply channel disposed in an inner hopper and arranged for forwarding the material to be crushed from an inlet opening arranged adjacent to an upper end of the supply channel to a hopper bottom opening arranged in a bottom of the inner hopper and communicating with the rotor, and an upper hopper portion located on top of the supply channel, the upper hopper portion having a bottom portion and an upper inlet end, the upper hopper portion supporting at least one upper throttle plate, and the inlet opening being arranged in the at least one upper throttle plate at the bottom portion and being aligned with the hopper bottom opening, the supply channel extending from the at least one upper throttle plate to the inner hopper bottom;
feeding material to be crushed to the feed hopper distribution device of the feed hopper means;
forwarding the material to be crushed via the supply channel of the feed hopper distribution device, the supply channel having a cross-section that widens along at least a portion of the distance from an upper end to a lower end of the supply channel to the hopper bottom opening;
utilizing the feed hopper distribution device for dividing the material to be crushed into a first flow of material and supplying that first flow via the supply channel to the rotor, and a second flow of material and supplying that second flow outside of the supply channel to a position outside of the rotor for being hit by the first flow of material accelerated by the rotor; and
feeding the material further to the rotor for being crushed.

11. The method according to claim 10 , further comprising the steps of forming a wall of material in a material space formed between the supply channel, an inner hopper of the feed hopper means and an inner hopper bottom of the inner hopper, and allowing the second flow of material to slide along a slope formed on the wall of material and extending from an upper inlet end of the feed hopper distribution device to at least one outlet formed in the inner hopper and further to the position outside of the rotor.

12. The method according to claim 11 , further comprising the step of arranging the upper throttle plate at the top of the supply channel and selecting a width of an inlet opening of the upper throttle plate that provides the largest amount of material to be crushed flowing vertically down through the supply channel to the rotor.

Assignees

• Sandvik Intellectual Property

Inventors

• Dallimore Rowan
• Forsberg Andreas
• Kjaerran Knut

Classifications

• B02C13/1807

  the material to be crushed being thrown against an anvil or impact plate (with horizontal axis B02C13/09; centrifugal acceleration of material through radially extending channels B02C19/0025; centrifugal acceleration of material by means of an open top rotor B02C19/0031) · CPC title

• B02C23/02 Primary

  Feeding devices ({for grain mills B02C11/04; for roller mills B02C4/286}; transport devices in general B65G) · CPC title

• B02C2013/28672

  Feed chute arrangements · CPC title

• B02C13/286

  Feeding or discharge · CPC title