WO2020006608A1 - Racloir de bande transporteuse - Google Patents

Racloir de bande transporteuse Download PDF

Info

Publication number
WO2020006608A1
WO2020006608A1 PCT/AU2019/050712 AU2019050712W WO2020006608A1 WO 2020006608 A1 WO2020006608 A1 WO 2020006608A1 AU 2019050712 W AU2019050712 W AU 2019050712W WO 2020006608 A1 WO2020006608 A1 WO 2020006608A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyor belt
scraper
belt scraper
body portion
spray nozzle
Prior art date
Application number
PCT/AU2019/050712
Other languages
English (en)
Inventor
Mark Gilbert
Original Assignee
Mark Gilbert
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2018902456A external-priority patent/AU2018902456A0/en
Application filed by Mark Gilbert filed Critical Mark Gilbert
Priority to AU2019297206A priority Critical patent/AU2019297206A1/en
Publication of WO2020006608A1 publication Critical patent/WO2020006608A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G45/00—Lubricating, cleaning, or clearing devices
    • B65G45/10—Cleaning devices
    • B65G45/24—Cleaning devices comprising plural diverse cleaning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G45/00—Lubricating, cleaning, or clearing devices
    • B65G45/10—Cleaning devices
    • B65G45/12—Cleaning devices comprising scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G45/00—Lubricating, cleaning, or clearing devices
    • B65G45/10—Cleaning devices
    • B65G45/22—Cleaning devices comprising fluid applying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like

Definitions

  • the present disclosure relates to a conveyor belt scraper.
  • the present invention relates to a secondary conveyor belt scraper for use with coal or various ores or minerals.
  • the conveyor belt scraper can be applied to other applications and industries.
  • Coal is generally extracted by either underground mining operations, or open-cut mining operations. After extraction of the raw coal, it is necessary to process the raw coal into final products depending on the intended market, and the quality and composition of the raw coal. Typical processing includes crushing to a uniform size and beneficiation.
  • Beneficiation may include washing and other processes to remove ash, sulphur and rock particles.
  • Coal has properties which dictate that coal particles and/or coal slurry are particularly susceptible to sticking to conveyor belts, especially at certain moisture levels.
  • coal During processing, and/or transportation, it is common for the coal to be
  • conveyor scrapers are often installed on the underside of the conveyor belt, adjacent to a roller which normally directs the belt around 180 degrees.
  • the conveyor scraper is generally in the form of a metal blade which scrapes across the surface of the conveyor belt, physically scraping any coal from the surface. The scraped coal is caught and returned to the processing line.
  • Such resilient blades are known to still suffer from damage during use on account of the large loads that may be applied, and owing to the limited amount of elastic deformability or spring.
  • the present invention provides a conveyor belt scraper comprising: a mounting base adapted to be mounted on a support structure;
  • a body portion having a proximal end extending away from the mounting base and a distal end;
  • a scraper blade located at the distal end of the body portion
  • a fluid flow passage extending through the body portion and/or mounting base, the fluid flow passage extending generally parallel to a tip of the scraper blade; a spray nozzle located in a lateral side of the body portion, the spray nozzle being in fluid communication with the fluid flow passage.
  • the spray nozzle is preferably angularly inclined to direct fluid upwardly and laterally.
  • the spray nozzle is preferably angled at about 45 degrees relative to a plane passing through a lateral surface of the scraper blade.
  • the spray nozzle preferably has a wide mouth profile configured to generate a flat fan spray distribution.
  • the conveyor belt scraper further preferably comprises a shroud formed on the body portion between the scraper blade and the spray nozzle.
  • the shroud is preferably defined by a projection extending laterally away from the body portion.
  • the shroud preferably has a generally inverted V shaped profile having an apex located above the spray nozzle.
  • the fluid flow passage is preferably defined by a hollow shaft located in the body portion and/or mounting base.
  • the hollow shaft preferably includes a first engagement formation located at a first end of the conveyor belt scraper and a second engagement formation located at an opposing second end of the conveyor belt scraper.
  • the first engagement formation is preferably defined by a male projection and the second engagement formation is preferably defined by a corresponding female recess.
  • the conveyor belt scraper preferably includes a polymer seal located on at least one of the male projection and the female recess.
  • the polymer seal is preferably an O-ring.
  • the present invention provides a method of cleaning a conveyor belt including the following steps:
  • the method further preferably includes the step of arranging a plurality of the conveyor belt scrapers end to end so that the respective fluid flow passages are coaxial and interconnected.
  • FIG. 1 is a front perspective view of a conveyor belt scraper according to the invention.
  • FIG. 2 is a rear perspective view of the conveyor belt scraper of Fig. 1;
  • FIG. 3 is an end view of the conveyor belt scraper of Fig. 1;
  • Fig. 4 is a cross-sectional end view of the conveyor belt scraper of Fig. 1;
  • Fig. 5 is a cross-sectional side view of the conveyor belt scraper of Fig. 1;
  • Fig. 6 is an end view of an end scraper for use with the conveyor belt scraper of Fig. 1;
  • Fig. 7 is a front perspective view of the end scraper of Fig. 6;
  • Fig. 8 is a perspective view of a spray nozzle of the conveyer belt scraper of Figs. 1 and 6.
  • FIG. 9 is a perspective view depicting two rows of conveyor belts scrapers according to the invention.
  • Fig. 10 depicts the two rows of conveyor belt scrapers of Fig 9 in operation
  • Fig. 11 is a top sectional view of a row of conveyor belt scrapers according to the invention.
  • Fig. 12 is a perspective view of a conveyor belt scraper according to a second embodiment. Detailed Description of the Preferred Embodiments
  • a conveyor belt scraper 10 is disclosed for use with conveyor belts.
  • the conveyor belt scraper 10 includes a mounting base 20 adapted to be mounted on a support structure.
  • the conveyor belt scraper 10 is a secondary scraper. Secondary scrapers are generally deployed after a primary, belt cleaning scraper, which serves to remove the bulk of material from the belt, so that the secondary scraper can effectively remove further difficult to remove material which is not shifted by primary scraping and gravity.
  • the mounting base 20 has two laterally extending projections in the form of feet or tabs 30, 40.
  • Each of the tabs 30, 40 is located an equal distance from an axis of symmetry XX of the mounting base 20, when viewed from the end view.
  • the tabs 30, 40 define recesses 50, 60 which enable the conveyor belt scraper 10 to be mounted to a mounting bar 65, as depicted in Figs. 9 and 10, which extends in a direction which is generally perpendicular relative to the direction of movement of a conveyor belt (not shown).
  • the mounting bar is typically positioned on the underside of the conveyor belt, near where the conveyor belt changes direction at a roller, normally by an angle of approximately 180°.
  • a hole 70 extends through the conveyor belt scraper 10 in the region of the mounting base 20.
  • the hole 70 extends parallel to the longitudinal axis YY.
  • the hole 70 is circular, and when a plurality of the conveyor belt scrapers 10 are arranged longitudinally in abutment, the holes 70 are coaxial.
  • a hollow shaft 80 extends through each hole 70.
  • the shaft 80 is fabricated from stainless steel or another suitable engineering material such as a durable polyurethane polymer.
  • the shaft 80 is cast into the conveyor belt scraper 10 during manufacture.
  • the shaft 80 could alternatively be inserted at a later stage after the casting process.
  • the shaft 80 may be omitted from the design.
  • the body portion 90 of the conveyor belt scraper has a proximal end 95 extending away from the mounting base 20 and a distal end 150.
  • the body portion 90 is integrally formed with the mounting base 20 from a polymer which provides resilient properties that facilitate elastic deflection when loaded.
  • a scraper blade 160 is located at the distal end 150 of the body portion 90.
  • the scraper blade 160 is defined by a planar steel plate, as shown in Fig. 5.
  • the scraper blade 160 is fabricated from a durable material such as hardened steel, tool steel, stainless steel or another suitable material.
  • Each blade 160 has a generally rectangular body. As shown in Fig. 5, a portion of the blade 160 is embedded in the distal end 150 of the body portion 90.
  • the embedded portion of the blade 160 includes at least one and preferably a plurality of apertures 165.
  • the apertures 165 enable the polymer of the body portion 90 to bond with the scraper blade 160 to provide improved blade bonding, and reduce the likelihood of the blade being pulled out by impact forces during conveyor belt scraping.
  • the hollow shaft 80 defines a fluid flow passage 85 within the conveyor belt scraper 10.
  • the fluid flow passage 85 extends through the body portion 90 or the mounting base 20, and the fluid flow passage 85 extends generally parallel to a tip of the scraper blade 160.
  • the hollow shaft 80 includes a first engagement formation located at a first end 120 of the conveyor belt scraper 10 and a second engagement formation located at an opposing second end 130 of the conveyor belt scraper 10.
  • the first engagement formation is defined by a male projection 140 and the second engagement formation is defined by a corresponding female recess 150.
  • the male projection 140 is sized to couple with the female recess 150 such that the conveyor belt scrapers 10 can be coupled end to end. This enables a plurality of the conveyor belt scrapers 10 to be arranged end to end with a single fluid flow channel 85 extending through the assembly.
  • At least one of the male projection 140 and the female recess 150 includes an annular groove for seating an O-ring or other sealing element to improve the fluid seal. In some embodiments, more than one seal may be provided.
  • the conveyor belt scraper 10 includes a spray nozzle 170 located in a lateral side of the body portion 90.
  • the spray nozzle 170 is in fluid communication with the fluid flow passage 85 by way of a channel 180.
  • the channel 180 extends perpendicular to the fluid flow passage 85.
  • the channel 180 is angled upwardly at about 45 degrees relative to a vertical plane, and accordingly about 45 degrees relative to a plane passing through a vertical, lateral surface of the scraper blade 160. Accordingly the angle
  • the spray nozzle 170 is angularly inclined to direct fluid in a direction which has both upward and lateral components.
  • the spray nozzle 170 may be used to direct fluids such as water or air, or other gasses or liquids. In the application of water, the spray nozzle 170 can be used to wash material from the conveyor belt at high pressure. In contrast, in the application of air, the spray nozzle 170 can be used to blow material from the conveyor belt. In an alternative embodiment, the spray nozzles 170 may be water vapour misting nozzles to generate a spray of mist to assist in settling dust.
  • the spray nozzle 170 has a wide mouth profile configured to generate a flat fan spray distribution. This wide mouth profile dictates that the liquid jet fans out from the nozzle 170 creating a spray distribution which extends parallel to the axis YY.
  • the width of the spray jet is as wide as the conveyor belt scraper 10 between the first end 120 of the conveyor belt scraper 10 and the opposing second end 130. Accordingly, when the conveyor belt scrapers 10 are arranged end to end in a row, as described before, the spray jets extend across the full length of the assembly of conveyor belt scrapers 10, such that the full width of an adjacent conveyor belt can be scraped and sprayed simultaneously.
  • the spray nozzle 170 has an attachment portion for connection with the channel 180.
  • the distal end of the channel 180 terminates in a projection or boss 185 extending from the body portion 90.
  • the base of the spray nozzle 170 includes a plurality of barbs 175 which can be driven into engagement with the inner wall of the channel 180.
  • the engagement between the spray nozzle 170 and the channel 180 may be by way of threaded fitting or taper.
  • the spray nozzle 170 is replaceable.
  • the spray nozzle 170 may be integrally formed with the channel 180 or permanently secured to the channel 180 during manufacture.
  • the spray nozzle 170 has a wide mouth profile to generate a fan distribution pattern.
  • the conveyor belt scraper 10 may deploy several spray nozzles 170 along the length of the fluid flow passage 85.
  • the spray nozzles 170 may be cone distribution or point distribution nozzles.
  • the spray nozzle liquid distribution pattern may overlap at the conveyor belt surface.
  • the spray nozzles 170 are located on the upstream side so that they face forward to the oncoming belt.
  • the body portion 90 includes a shroud or cover 200 which is located on a lateral wall of the body portion 90.
  • the shroud 200 is located vertically between the scraper blade 160 and the spray nozzle 170.
  • the shroud 200 is defined by a projection extending laterally away from the body portion 90.
  • the shroud 200 has a generally inverted V shaped profile having an apex 210 located above the spray nozzle 170.
  • the shroud 200 projects laterally away from the wall of the body portion 90 beyond the horizontal position of the spray nozzle 170. Accordingly, the shroud 200 guards the spray nozzle 170 from falling debris, such as coal particles. In this way, the shroud 200 protects the spray nozzle 170, reducing the likelihood of damage, or blocking of the spray nozzles 170.
  • the body portion 90 has a profile having the shape of a diamond that has been truncated on the lower side. Accordingly, the body portion 90 has first and second opposing projections 105, 115 which extend laterally. At the interface between the body portion 90 and the mounting base 20, the body portion 90 narrows, defining a region of reduced cross sectional area, providing increased flexibility. Accordingly, if the conveyor belt scraper 10 experiences an impact force during scraping, the body portion 90 is resiliently deformable, permitting elastic deformation of the tip of the scraper blade 160.
  • the spray nozzles 170 may be operated continuously or intermittently. In addition, the spray nozzles 170 may be used to distribute water. Flowever, the spray nozzles 170 may alternatively be used to distribute other liquids which are required or desired during the beneficiation process.
  • Each end of the row of conveyor belt scrapers 10 terminates at an end scraper 15.
  • the end scraper 15 has no blade, and the upper portion of the body portion 90 defines a solid polymer block which serves the purpose of supporting the two lateral edges of the conveyor belt.
  • the end scraper 15 also includes a spray nozzle 170.
  • the input of the shaft 80 of the end scraper includes a female threaded connection which enables a water or other fluid line to be connected.
  • the male projection 140 of the end scraper 15 at the opposing end of the row of coupled scrapers 10 is capped to prevent water egression.
  • a conveyor belt scraper 10 according to a second embodiment is disclosed.
  • the second embodiment is structurally and functionally similar.
  • the male projection 140 is defined by a spigot 250 which is integrally formed with the body portion 90 of the conveyor belt scraper 10.
  • the spigot 250 is sized to fit with a corresponding female recess or socket 150 located at the opposing end of the scraper 10.
  • the spigot 250 may be less costly to manufacture and simplifies the manufacturing process on account of less parts being required to fabricate the scraper 10.
  • the spray nozzle 170 is depicted as a fishtail type nozzle 172, to achieve a wide fanning jet of air or water.
  • the conveyor belt scraper 10 Whilst the conveyor belt scraper 10 is described and shown with a spray nozzle 170 located on one side, in an alternative arrangement, the spray nozzles 170 may be positioned on each side of the conveyor belt scrapers 10, so that fluid can be sprayed to both sides of the conveyor belt, before and after engagement with the scraper blade 160.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Belt Conveyors (AREA)

Abstract

L'invention concerne un racloir de bande transporteuse (10) comprenant une base de montage (20) conçue pour être montée sur une structure support. Le racloir de bande transporteuse (10) comprend une portion de corps (90) ayant une extrémité proximale (95) qui s'étend à l'opposé de la base de montage (20) et une extrémité distale (150). Une lame de racloir (160) se trouve à l'extrémité distale (150) de la portion de corps (90). Un passage d'écoulement de fluide (85) s'étend à travers la portion de corps (90) et/ou la base de montage (20), le passage d'écoulement de fluide (85) s'étendant globalement parallèlement à une pointe de la lame de racloir (160). Une buse de pulvérisation (170) est située dans un côté latéral de la portion de corps (90), la buse de pulvérisation (170) étant en communication fluidique avec le passage d'écoulement de fluide (85).
PCT/AU2019/050712 2018-07-06 2019-07-05 Racloir de bande transporteuse WO2020006608A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2019297206A AU2019297206A1 (en) 2018-07-06 2019-07-05 Conveyor belt scraper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2018902456A AU2018902456A0 (en) 2018-07-06 Conveyor belt scraper
AU2018902456 2018-07-06

Publications (1)

Publication Number Publication Date
WO2020006608A1 true WO2020006608A1 (fr) 2020-01-09

Family

ID=69060553

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2019/050712 WO2020006608A1 (fr) 2018-07-06 2019-07-05 Racloir de bande transporteuse

Country Status (2)

Country Link
AU (1) AU2019297206A1 (fr)
WO (1) WO2020006608A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2221887B (en) * 1988-07-29 1992-05-27 Conveyor Improvements Conveyor belt scraper assembly
EP0390595B1 (fr) * 1989-03-31 1993-11-10 Belle Banne (Aust.) Pty Limited Dispositif de nettoyage pour courroies de transport
US5355992A (en) * 1993-10-15 1994-10-18 Utility Technical Services, Inc. Belt cleaning apparatus
CN206767031U (zh) * 2017-05-25 2017-12-19 西安科技大学 一种煤炭运输带的清洗装置
CN207827276U (zh) * 2018-01-19 2018-09-07 江苏智维自动化设备有限公司 皮带自动清洗机构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2221887B (en) * 1988-07-29 1992-05-27 Conveyor Improvements Conveyor belt scraper assembly
EP0390595B1 (fr) * 1989-03-31 1993-11-10 Belle Banne (Aust.) Pty Limited Dispositif de nettoyage pour courroies de transport
US5355992A (en) * 1993-10-15 1994-10-18 Utility Technical Services, Inc. Belt cleaning apparatus
CN206767031U (zh) * 2017-05-25 2017-12-19 西安科技大学 一种煤炭运输带的清洗装置
CN207827276U (zh) * 2018-01-19 2018-09-07 江苏智维自动化设备有限公司 皮带自动清洗机构

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Publication number Publication date
AU2019297206A1 (en) 2021-01-21

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