AU2015200591B2

AU2015200591B2 - Screen mount assembly

Info

Publication number: AU2015200591B2
Application number: AU2015200591A
Authority: AU
Inventors: Christopher Gordon
Original assignee: FLSmidth AS
Current assignee: FLSmidth AS
Priority date: 2015-02-06
Filing date: 2015-02-06
Publication date: 2021-11-11
Anticipated expiration: 2035-02-06
Also published as: AU2015200591A1

Abstract

A screen mount assembly for mounting a screen assembly to a chassis. The screen mount assembly comprises a plurality of elongate support members having two side walls connected by a web, and a plurality of brackets 5 configured to be mountable to the chassis. The elongate support members have at least one screen assembly receiving portion in the web and the plurality of brackets are affixed to at least one of the side walls of the elongate support members. 1/4 CC C C)C CC) LL 0L

Description

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P/00101 1 Regulation 3.2

AUSTRALIA

Patents Act 1990

COMPLETE SPECIFICATION STANDARDPATENT

Invention Title: Screen mount assembly

The following statement is a full description of this invention, including the best method of performing it known to us:

(Ani'q

-1A SCREEN MOUNT ASSEMBLY

FIELD OF THE INVENTION

The invention relates to a screen mount assembly. In particular,

although not exclusively, the invention relates to a screen mount assembly of a

vibrating screen for separation of materials such as ores in mining and mineral

processing.

BACKGROUND TO THE INVENTION

Reference to background art herein is not to be construed as an

admission that such art constitutes common general knowledge in Australia or

elsewhere.

Vibrating screens are typically used in the mining and mineral processing

industries to separate materials, such as coal, by size. A vibrating screen

typically has a chassis with screen panels. The chassis is typically rigid with

various support members to ensure structural integrity. The chassis is mounted

on springs, or the like, and has vibrators which cause the chassis, and therefore

the screen panels, to vibrate. The screen panels have apertures which allow

smaller sized material to pass through. In use, the chassis vibrates and

material is passed over the screen panels and smaller material is separated

from larger material as it passes through the apertures in the screen panels.

The screen panels are typically removably mounted to a deck support

which is mounted on cross members between side walls of the chassis.

Typically the deck support includes longitudinal members known as stringers

that extend the length of the screen. The stringers are typically pieces of angle bar bolted to a bracket which is in turn bolted to the cross members. As the chassis of the vibrating screen vibrates the vibratory forces are transferred through to the screen panels via the cross members, brackets, and stringers.

Over time the structural integrity of the stringers is affected by the

continual load placed on them. It is relatively common to reinforce the stringers

when an area of potential weakness is identified, typically by welding a

reinforcement section to the stringer. This is a time consuming process that

increases the downtime of the vibrating screen. Furthermore, it is not

uncommon for the stringer to subsequently fail in a region adjacent the area

that was reinforced. Should a stringer fail, which may also occur due to not

identifying a weakness before failure, the vibrating screen may fail to operate as

intended and significant downtime is required to make the necessary repairs

and stringer replacement.

It will be clearly understood that any reference herein to background

material or information, or to a prior publication, does not constitute an

admission that any material, information or publication forms part of the

common general knowledge in the art, or is otherwise admissible prior art,

whether in Australia or in any other country.

OBJECT OF THE INVENTION

It is an object of the invention to overcome or at least alleviate one or

more of the above problems and/or provide the consumer with a useful or

commercial choice.

Other preferred objects of the present invention will become apparent

from the following description.

DISCLOSURE OF THE INVENTION

In oneform, although it need not be the only or indeed the broadestform,

the invention resides in a screen mount assembly for mounting a screen

assembly to a chassis; the screen mount assembly comprising:

a plurality of elongate support members each having a substantially'U'

shaped cross section defined by two side walls connected by a web; and

a plurality of brackets configured to be mountable to the chassis;

wherein each of the plurality of brackets comprises a support member

engaging portion and a chassis engaging portion;

wherein each of the elongate support members has at least one

screen assembly receiving portion in its web and each of the support member

engaging portions of the plurality of brackets is affixed to one of the side walls of

the elongate support members such that brackets are provided in opposed

pairs, with one of each pair being mounted to each of opposed sides of the side

walls of the support members; and

wherein the screen mount assembly is configured such that the web of

each of the plurality of elongate support members is spaced from the chassis by

its respective two side walls, with ends of the substantially "U" shaped cross

section being positioned closest to the chassis.

Preferably the side walls oppose each other and, even more preferably,

are substantially parallel. The web is preferably substantially perpendicular to

thesidewalls. Preferably junctions between the web and the side walls have

at least a portion which is transverse to the side wall and web of the junction.

Preferably the junctions are rounded.

- 3A

Preferably the at least one screen assembly receiving portion is an

aperture in the web. Preferably a plurality of screen assembly receiving

portions are provided in the form of a plurality of apertures in the web.

Preferably the apertures are substantially circular. Preferably the web is

configured to receive a mounting system for a deck support of the screen

assembly in the apertures.

Preferably the side walls have at least one bracket mounting portion to

affix the brackets thereto. Preferably a plurality of bracket mounting portions are provided in the form of a plurality of apertures, preferably substantially circular apertures, in the side walls. Preferably the side walls are configured to receive fasteners that affix the bracket to the side walls. In a preferred form, the fasteners comprise nuts and bolts. Preferably apertures in the side walls are offset along a longitudinal axis of the elongate support member relative to apertures in the web.

Preferably the web is narrower than the side walls. The side walls are

preferably approximately 75 to 175mm wide, more preferably 100 to 150mm

wide, even more preferably 120 to 130mm wide, and in a preferred form

approximately 125mm wide. The web is preferably approximately 50 to 150mm

wide, more preferably 75 to 125mm wide, even more preferably 95mm to

105mm wide, and in a preferred form approximately 100mm wide. Preferably

the side walls and web have substantially the same thickness. Preferably the

sidewalls and web are approximately 4 to 20mm thick, more preferably 5 to 15

mm thick, even more preferably 6 to 12 mm thick, and in a preferred form

approximately 9 mm thick.

Preferably the brackets are elongate. Preferably the brackets comprise

a support member engaging portion and a chassis engaging portion. Preferably

the support member engaging portion and the chassis engaging portions are of

unequal length. Preferably the support member engaging portion and the

chassis engaging portion are substantially perpendicular. Preferably the

support member engaging portion has apertures that align with apertures in the

side wall of the elongate support members.

Preferably the chassis engaging portion has at least one chassis

mounting portion to affix the bracket to the chassis. Preferably a plurality of

chassis mounting portions are provided in the form of a plurality of apertures,

preferably substantially circular apertures, in the chassis engaging portion of the

bracket. Preferably a single bracket is affixed to one or two elongate support

members. Preferably a plurality of elongate support members are aligned with

a single bracket being affixed to free ends of the aligned elongate support

members and a single bracket being affixed to two elongate support members

where adjacent aligned elongate support members meet.

Preferably each elongate support member has a pair of apertures at

each end that correspond to a pair of apertures in the support member

engaging portion of the brackets to receive a fastener, preferably a nut and bolt,

that fastens the bracket to the elongate support member. Preferably each

elongate support member has four pairs of such apertures, two pairs at each

end with one pair being in each of the two side walls.

In a preferred form, the screen mount assembly comprises a plurality of

sets of elongate support members, each set of elongate support members

being aligned longitudinally with at least one bracket located between adjacent

pairs of elongate support members from each set.

According to another aspect of the invention, there is provided a vibrating

screen assembly comprising a chassis including two side walls and cross

members therebetween; a vibrator mounted to the chassis; a screen mount

assembly as described herein affixed to the cross members; and a plurality of

screen panels mounted to the screen mount assembly.

Further features of the present invention will become apparent from the

following detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

To assist in understanding the invention and to enable a person skilled in

the art to put the invention into practical effect, preferred embodiments of the

invention will be described by way of example only with reference to the

accompanying drawings, wherein:

Figure 1 is a perspective view of a screen mount assembly according to

an aspect of the invention;

Figure 2 is a close up view of a portion of the screen mount assembly

illustrated in Figure 1;

Figure 3 is a perspective view of an elongate support member according

to an aspect of the invention;

Figure 4 is an end elevation view of the elongate support member

illustrated in figure 3;

Figure 5 is a perspective view of a bracket according to an aspect of the

invention; and

Figure 6 is an end elevation view of the elongate support member

illustrated in figure 5.

DETAILED DESCRIPTION OF THE INVENTION

Figure 1 illustrates a screen mount assembly 10 comprising five parallel

sets 12 of five elongate support members 20, with each set 12 having the five

elongate support members 20 being aligned end to end along a longitudinal axis. Each support member 20 of each set 12 is inclined relative to the others, creating a generally concaved curve arrangement. Each elongate support member 20 has a bracket 40 located adjacent each end. The brackets 40 are affixed to the elongate support members 20 and are adapted to be affixed to a chassis (not shown) of a vibrating screen.

The array of elongate support members 20 illustrated in figure 1 provides

a screen mount assembly 10 that receives screen panels (not shown). A

plurality of screen panels can be mounted to the screen mount assembly 10

illustrated in figure 1 using two rails (not shown) parallel to the outer sets 12 of

elongate support members 20, with one rail on either side of the screen mount

assembly 10.

Figure 2 illustrates a close up of region 100 in figure 1, illustrating an end

22 of a single support member 20 affixed with a fastener in the form of a nut

and bolt 60 to a bracket 40. A second fastener 62 is also illustrated in the

bracket 40 which is used to fasten the bracket 40 to a chassis (not shown) of a

vibrating screen.

Figures 3 and 4 illustrate a single support member 20 in its entirety

having two opposed side walls 24 connected by a web portion 26. The

junctions 28 between the side walls 24 and the web portion 26 are curved

resulting in the support member 20 having a substantially 'U' shaped cross

section as shown by the end elevation view illustrated in figure 4. The elongate

support member has a consistent thickness and the web 26 is narrower in width

than the side walls 24. In a preferred embodiment the support member is 9mm thick, the side walls are approximately 125mm wide, and the web is approximately 100mm wide.

The side walls 24 have two bracket mounting portions in the form of two

pairs of apertures 30. The pair of apertures at the end 22 is located closer to

the middle as end 22 is the terminal end of the set 12 of elongate support

members 20 as illustrated in figures 1 and 2. Otherwise, and more typically, the

apertures 30 are arranged adjacent the end 32 that abuts a further elongate

support member (see figure 1). As seen most clearly in figure 4, the apertures

30 are co-axially located in both opposed side walls 24.

The web 26 of the support member 20 has a plurality of screen assembly

receiving portions in the form of apertures 34 which are spaced along the length

of the web 26. The apertures 34 of the web 26 receive fasteners of a mounting

system (not shown) that mounts the screen panels (not shown), typically

releasably, to the support members 20.

Figures 5 and 6 illustrate a single bracket 40 in its entirety having a

support member engaging portion 42 and a chassis engaging portion 44. The

bracket 40 is substantially right angled, with the support member engaging

portion 42 being substantially perpendicular to the chassis engaging portion 44.

The support member engaging portion 42 has two pairs of apertures 46

that align with apertures 30 of the side wall 24 of the elongate support members

20. The chassis engaging portion 44 has a pair of chassis mounting portions in

the form of a pair of apertures 48 that correspond to apertures in the chassis

(not shown).

Reverting back to figure 2, support member 20 is affixed to bracket 40

using nut and bolt 60 that passes through aligned apertures 30 and 46 of the

support member 20 and bracket 40, respectively. Bracket 40 is also affixed to a

chassis (not shown) of a vibrating screen using fastener 62 effectively

connecting the support member 20 to the chassis of the vibrating screen.

Although not clearly illustrated in figures 1 and 2, in a preferred embodiment

brackets 40 are provided in opposed pairs, with one of each pair being mounted

to each of opposed sides of the side walls 24 of the support members 20 to

provide a more secure connection between the chassis and the support

members 20.

As end 22 illustrated in close up region 100 of figure 2 is a terminal end

of a set 12 the bracket is only connected to the one support member 20.

However, as illustrated in figure 1, typically the brackets 40 are positioned

between adjacent pairs of support members 20 such that they connect adjacent

ends of the pairs of support members 20 together.

In use, a vibrator of the vibrating screen (not shown) generates vibratory

forces which are transferred to a chassis of the vibrating screen, which are in

turn transferred to the brackets 40, the support members 20, and to the screen

panels (not shown) mounted to the support members 20. Advantageously, the

screen mount assembly 10 provides a stronger, heavier duty system for

mounting the screen panels to a vibrating screen while not constricting access

to the screen mount apertures 34 which can be important in mounting the

screens to the support members 20.

As the support members 20 have two brackets 40, one on either side 24,

they are supported better and conduct vibratory forces more efficiently than

previously known systems. It is envisaged that additional reinforcing, such as

subsequently welded reinforcement plates, will not be required to maintain the

structural integrity of the support members 20 of the present invention.

Additionally, because junctions 28 of the side walls 24 and web 26 of support

members 20 are curved, any material which may settle on web 26 in use is

urged downward off the support member 20, particularly when under vibration.

In this specification, adjectives such as first and second, left and right,

top and bottom, and the like may be used solely to distinguish one element or

action from another element or action without necessarily requiring or implying

any actual such relationship or order. Where the context permits, reference to

an integer or a component or step (or the like) is not to be interpreted as being

limited to only one of that integer, component, or step, but rather could be one

or more of that integer, component, or step etc.

The above description of various embodiments of the present invention

is provided for purposes of description to one of ordinary skill in the related art.

It is not intended to be exhaustive or to limit the invention to a single disclosed

embodiment. As mentioned above, numerous alternatives and variations to the

present invention will be apparent to those skilled in the art of the above

teaching. Accordingly, while some alternative embodiments have been

discussed specifically, other embodiments will be apparent or relatively easily

developed by those of ordinary skill in the art. The invention is intended to

embrace all alternatives, modifications, and variations of the present invention that have been discussed herein, and other embodiments that fall within the spirit and scope of the above described invention.

In the present specification and claims (if any), the word "comprising"

and its derivatives including "comprises" and "comprise" include each of the

stated integers but does not exclude the inclusion of one or more further

integers unless the context of use indicates otherwise.

Claims

CLAIMS:

1. A screen mount assembly for mounting a screen assembly to a chassis;

the screen mount assembly comprising:

a plurality of elongate support members each having a substantially 'U' shaped

cross section defined by two side walls connected by a web; and

a plurality of brackets configured to be mountable to the chassis;

wherein each of the plurality of brackets comprises a support member engaging

portion and a chassis engaging portion;

wherein each of the elongate support members has at least one screen assembly

receiving portion in its web and each of the support member engaging portions of the

plurality of brackets is affixed to one of the side walls of the elongate support members

such that brackets are provided in opposed pairs, with one of each pair being mounted

to each of opposed sides of the side walls of the support members; and

wherein the screen mount assembly is configured such that the web of each of

the plurality of elongate support members is spaced from the chassis by its respective

two side walls, with ends of the substantially "U" shaped cross section being positioned

closest to the chassis.

2. The screen mount assembly of claim 1, wherein the side walls oppose

each other and are substantially parallel.

3. The screen mount assembly of claim 1 or 2, wherein the web is

substantially perpendicular to the side walls.

4. The screen mount assembly of any one of the preceding claims, wherein

junctions between the web and the side walls of the elongate support members have at

least a portion which is transverse to the side wall and web of the junction.

5. The screen mount assembly of any one of the preceding claims,

wherein a curved junction is provided between the web and each of the two side

walls.

6. The screen mount assembly of any one of the preceding claims, wherein

the support member engaging portion and the chassis engaging portion are substantially

perpendicular.

7. The screen mount assembly of any one of the preceding claims, wherein

the support member engaging portion has apertures that align with apertures in the side

wall of the elongate support members and the chassis engaging portion has at least one

chassis mounting portion to affix the bracket to the chassis.

8. The screen mount assembly of any one of the preceding claims, wherein at

least a portion of the brackets are each affixed to two aligned elongate support

members.

9. The screen mount assembly of any one of the preceding claims,

comprising a plurality of sets of elongate support members, each set of elongate support members being aligned longitudinally with at least one bracket located between adjacent pairs of elongate support members from each set.

10. A vibrating screen assembly comprising:

a chassis including two side walls and cross members therebetween;

a vibrator mounted to the chassis;

a screen mount assembly, as claimed in any one of the preceding claims, affixed

to the cross members; and

a plurality of screen panels mounted to the screen mount assembly.