WO2013059867A1 - Conveyor belt sampler - Google Patents
Conveyor belt sampler Download PDFInfo
- Publication number
- WO2013059867A1 WO2013059867A1 PCT/AU2012/001299 AU2012001299W WO2013059867A1 WO 2013059867 A1 WO2013059867 A1 WO 2013059867A1 AU 2012001299 W AU2012001299 W AU 2012001299W WO 2013059867 A1 WO2013059867 A1 WO 2013059867A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conveyor
- belt
- sampling
- primary
- falling
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
- G01N2001/2007—Flow conveyors
- G01N2001/2028—Belts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
- G01N2001/2092—Cross-cut sampling
Definitions
- This invention relates to a conveyor belt sampler and has been devised particularly though not solely for sampling minerals being conveyed on a belt conveyor from a mine into a processing plant.
- Falling-stream samplers are the most accurate way to sample the material on a conveyor belt but these samplers are difficult to retrofit to existing conveyor belt situations and often have access and availability problems.
- Cross-belt samplers are a much cheaper alternative to retrofit, and are often installed in new plant, but are not as accurate as falling-stream samplers.
- Weightometers are often placed under belt conveyors to measure the mass of materials being conveyed, but they often have accuracy problems due to the length, speed and tension in the conveyor belt.
- the present invention therefore provides apparatus for sampling material being conveyed on a primary belt conveyor having a general run of belt, the apparatus including an upper roller positioned beneath the belt of the conveyor and arranged to divert the belt steeply downwardly from the general run of belt, a lower roller positioned generally below the upper roller, arranged to engage the upper surface of the belt and redirect the belt to the general run of belt, and a sampler arranged to select and sample material falling from the belt as it is diverted downwardly by the upper roller.
- the sampler comprises a falling-stream sample cutter having a cutter bucket arranged to traverse material falling from the belt adjacent the upper roller.
- the apparatus includes a separate sampling conveyor positioned to receive material falling from the belt as it is diverted downwardly by the upper roller and convey that material above the general run of belt before discharging it in a stream on to the general run of belt below, the sampler comprising a falling-stream sample cutter having a cutter bucket arranged to traverse the stream discharging from the sampling conveyor.
- the sampling conveyor is wider than the primary conveyor and arranged to run at a slower speed than the primary conveyor, and wherein a weightometer is positioned beneath the belt of the sampling conveyor.
- the apparatus further includes an impact conveyor positioned between the upper roller and the sampling conveyor and arranged to receive material falling from the belt as it is diverted downwardly by the upper roller and discharge that material on to the impact conveyor, the impact conveyor having substantially the same width as the sampling conveyor and running at substantially the same speed as the sampling conveyor.
- Figure 1 is a diagrammatic perspective view of a conveyor belt sampler according to the invention.
- Figure 2 is a diagrammatic elevation of the apparatus shown in Figure 1 ;
- Figure 3 is a plan view of the apparatus shown in Figure 1 ;
- Figure 4 is a diagrammatic perspective view of a conveyor belt sampler according to the invention incorporating a sampling conveyor;
- Figure 5 is a diagrammatic elevation of the apparatus shown in Figure 4.
- Figure 6 is a plan view of the apparatus shown in Figure 4.
- Figure 7 is a diagrammatic perspective view of a conveyor belt sampler according to the invention incorporating both a sampling conveyor and an impact conveyor;
- Figure 8 is a diagrammatic elevation of the apparatus shown in Figure 7;
- Figure 9 is a plan view of the apparatus shown in Figure 7;
- Figure 10 is a diagrammatic perspective view of a conveyor belt sampler according to the invention wherein material to be sampled is projected upwardly into the sampler;
- Figure 1 1 is a diagrammatic elevation of the apparatus shown in Figure 10;
- Figure 12 is a similar view to Figure 10 incorporating a sampling conveyor;
- Figure 13 is a diagrammatic elevation of the apparatus shown in Figure 12. Preferred Embodiments of the Invention
- the primary conveyor 1 is provided with an upper roller 2 positioned beneath the belt 3 of the conveyor and arranged to divert the belt steepwardly downwardly over belt portion 4 from the general run of belt 7.
- a lower roller 5 is positioned generally below the upper roller and arranged to engage the upper surface of the belt at 6 and redirect the belt to the general run of belt 7.
- a falling-stream sample cutter having a cutter bucket 8 is located and arranged to select and sample material falling from the belt as it is diverted downwardly by the upper roller 2.
- the falling-stream sample cutter typically includes a bucket of the type shown diagrammatically at 8, movable along transverse rails beneath the discharge stream 17 from the primary conveyor at 3 as shown by arrows 16 in the manner which is well known in the art.
- the apparatus can optionally include a sampling conveyor 9 as shown in Figures 4, 5 and 6.
- the sampling conveyor comprises a short conveyor belt 10 entrained over end rollers 1 1 and 12 and positioned to receive material falling from the primary belt at 3 as it is diverted downwardly by the upper roller 2.
- the sampling conveyor then conveys that material above the general run of belt 7 before discharging it in a stream at 13 on to the general run of belt 7 below.
- a falling-stream cutter bucket 8 is provided to sample the material falling from the discharge 13 of the sampling conveyor 9 on to the general run of belt 7 below.
- the sampling conveyor 10 may be provided with a weightometer 19 as is generally well known to those skilled in the art positioned beneath the upper run 10 of the sampling conveyor 9.
- the sampling conveyor 9 may be provided having a greater width than the width of the primary conveyor belt 1 . This can be clearly seen in Figure 6 where the primary conveyor belt shown at 1 and 7 is considerably narrower than the belt 10 on the sampling conveyor 9.
- the speed of the sampling conveyor can be significantly reduced while still maintaining the same throughput of material from the primary conveyor 1 .
- the primary conveyor is operating at 6 metres per second and the sampling conveyor is three times wider than the primary conveyor 1 , then the sampling conveyor 4 need only operate at 2 metres per second in order to maintain the flow of material from the primary conveyor 1 .
- This feature allows for significantly more accurate operation of the falling-stream sampler 8 and the weightometer 19.
- an impact conveyor 14 may also be provided positioned between the upper roller 2 and the sampling conveyor 9 as shown in Figures 7, 8 and 9.
- the impact conveyor 14 is arranged to receive material falling from the primary belt conveyor 1 as it is diverted downwardly by the upper roller 2 as shown by arrow 20 and to discharge that material at 21 on to the sampling conveyor 9. It is preferred that the impact conveyor 14 has substantially the same width as the sampling conveyor 9 and runs at substantially the same speed as the sampling conveyor.
- the provision of the impact conveyor 14 allows the sampling conveyor 9 to operate at a constant speed without being significantly affected by the inertia of material from the primary conveyor 1 as it falls over the discharge point 3. Because the impact conveyor is preferably the same width as the sampling conveyor 9, the slowing and spreading of the material falling from the primary conveyor belt 1 takes place on the impact conveyor 14 so that the material falling from the discharge end 15 of the impact conveyor on to the sampling conveyor 9 falls at a consistent and gentle rate.
- the conveyor sampling system according to the invention is more accurate in terms of sampling and mass flow measurement and existing sampling and flow measurement systems, is cheaper and safer to maintain and will cost less than existing systems, whether it is fitted to a new system or to a retrofit.
- a compression belt conveyor 22 may be incorporated as shown in Figures 10 and 1 1 .
- the inclined compression belt conveyor 22 is provided immediately upstream of the upper roller 2 and arranged to run at the same belt speed as the primary belt conveyor 1 .
- the compression belt conveyor has rollers 23 and 24 around which is entrained a compression belt having an upper surface 25 and an underside 26.
- the roller 24 is positioned just above the general run of belt 1 so that material proceeding along the belt as shown by arrow 29 passes between the primary belt in region 28 and the lower roller 24 of the compression belt conveyor such that it is compressed between the primary belt conveyor at 27 and the underside 26 of the compression belt conveyor and moved upwardly as shown by arrows 30 and 31 .
- the sampling conveyor 38 is added into the mechanism previously described with reference to Figures 10 and 1 1 in a similar manner to the sampling conveyor 9 as previously described with reference to Figures 4 and 5. Material projected upwardly as shown by arrows 31 and 32 from the compression belt conveyor 22, rather than landing directly into the falling stream cutter bucket 8, lands on top of the sampling conveyor 38 where it may be accurately weighed by the weightometer 19.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2012327863A AU2012327863A1 (en) | 2011-10-25 | 2012-10-25 | Conveyor belt sampler |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2011904425 | 2011-10-25 | ||
AU2011904425A AU2011904425A0 (en) | 2011-10-25 | Conveyor belt sampler |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013059867A1 true WO2013059867A1 (en) | 2013-05-02 |
Family
ID=48166940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2012/001299 WO2013059867A1 (en) | 2011-10-25 | 2012-10-25 | Conveyor belt sampler |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2012327863A1 (en) |
WO (1) | WO2013059867A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107144442A (en) * | 2017-06-30 | 2017-09-08 | 福建南方路面机械有限公司 | Belt middle automatic sampling drying unit |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3659460A (en) * | 1970-06-24 | 1972-05-02 | John A Cahill | Apparatus for sampling ore and the like |
US3875803A (en) * | 1972-09-20 | 1975-04-08 | Birtley Eng Ltd | Equipment for sampling bulk material |
SU698846A1 (en) * | 1977-06-01 | 1979-11-25 | Брянский Институт Транспортного Машиностроения | Stand for testing belt conveyer assemblies |
US4930359A (en) * | 1988-03-02 | 1990-06-05 | Rheinische Braunkohlenwerke Ag | Apparatus for preparing samples from a flow of bulk material |
KR20020032916A (en) * | 2000-10-28 | 2002-05-04 | 이구택 | Device for preventing upsets of conveyor belt |
KR20020041063A (en) * | 2000-11-27 | 2002-06-01 | 이구택 | Removing device of ice on conveyor belt |
-
2012
- 2012-10-25 WO PCT/AU2012/001299 patent/WO2013059867A1/en active Application Filing
- 2012-10-25 AU AU2012327863A patent/AU2012327863A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3659460A (en) * | 1970-06-24 | 1972-05-02 | John A Cahill | Apparatus for sampling ore and the like |
US3875803A (en) * | 1972-09-20 | 1975-04-08 | Birtley Eng Ltd | Equipment for sampling bulk material |
SU698846A1 (en) * | 1977-06-01 | 1979-11-25 | Брянский Институт Транспортного Машиностроения | Stand for testing belt conveyer assemblies |
US4930359A (en) * | 1988-03-02 | 1990-06-05 | Rheinische Braunkohlenwerke Ag | Apparatus for preparing samples from a flow of bulk material |
KR20020032916A (en) * | 2000-10-28 | 2002-05-04 | 이구택 | Device for preventing upsets of conveyor belt |
KR20020041063A (en) * | 2000-11-27 | 2002-06-01 | 이구택 | Removing device of ice on conveyor belt |
Also Published As
Publication number | Publication date |
---|---|
AU2012327863A1 (en) | 2014-05-15 |
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