EP0056176A1 - Transportable Einrichtung zur Oberflächenbehandlung - Google Patents

Transportable Einrichtung zur Oberflächenbehandlung Download PDF

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Publication number
EP0056176A1
EP0056176A1 EP81300153A EP81300153A EP0056176A1 EP 0056176 A1 EP0056176 A1 EP 0056176A1 EP 81300153 A EP81300153 A EP 81300153A EP 81300153 A EP81300153 A EP 81300153A EP 0056176 A1 EP0056176 A1 EP 0056176A1
Authority
EP
European Patent Office
Prior art keywords
corridor
rebound
blast
particles
treating apparatus
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP81300153A
Other languages
English (en)
French (fr)
Inventor
John C. Bergh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wheelabrator Frye Inc
Original Assignee
Wheelabrator Frye Inc
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
Application filed by Wheelabrator Frye Inc filed Critical Wheelabrator Frye Inc
Priority to EP81300153A priority Critical patent/EP0056176A1/de
Publication of EP0056176A1 publication Critical patent/EP0056176A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
    • B24C3/065—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable with suction means for the abrasive and the waste material
    • B24C3/067—Self-contained units for floorings

Definitions

  • This invention relates to a device for treatment of surfaces with particulate material thrown at high velocity onto the surface and it relates more particularly to a portable device which makes use of one or more airless wheels having radially extending blades for throwing, by centrifugal force, particulate material such as steel shot, grit, or abrasive particles against the surface for cleaning, abrading, or other surface treatment.
  • Recovery of the particulate material and abrasive entails the problems'of removal of the particulate material and abrasive from the surface after they have served their purpose, separating re-usable particulate material and abrasive from the dust, dirt and fines picked up from the surface, and returning the cleaned particulate material or abrasive for recycle to the centrifugal blasting wheel for re-use in surface treatment.
  • Such recovery, cleaning and recycle of cleaned particulate material and abrasive should be embodied as a unit with the centrifugal wheel or wheels and housing for confinement of the thrown abrasive particles if the unit is intended for use as a portable surface cleaning or treating device.
  • the invention will be described with reference-to an apparatus for cleaning a horizontally disposed, relatively flat surface, such as a floor 18, ship's deck, airport runway, street and the like, but it will be understood that the apparatus to be described has application also for the treatment of surfaces other than flat and other than horizontal, such for example as a rolling surface, inclined surface and even a vertical surface.
  • the apparatus of this invention has application for the treatment of surfaces with other particulate material for use in cleaning surfaces, removal of surface finishes, hardening surfaces as by peening or impacting, and for providing certain finishes to a metal, plastic, wooden and the like surface.
  • the type of surface treatment or finish depends somewhat upon the type of particulate material projected onto the surface such as steel shot, steel grit, metal abrasive, sand for surface cleaning, or softer materials such as particulate organic materials in the form of nut shells, nut seeds, wooden or plastic particles and the like for surface finishing, hereinafter collectively referred to as abrasive particles.
  • an apparatus which includes a rigid frame 12 mounted on wheels 14, one of which is in the form of a caster wheel 16 for enabling movement of the apparatus in various directions over the surface 18 to be treated.
  • the apparatus may be adapted for movement by hand, in which event handle bars are provided to extend rearwardly from the frame, or, as illustrated in the drawing, the apparatus may be powered for movement over the surface, as by means of a motor drive 21, with steering means 24 for maneuvering the apparatus over the surface to be treated.
  • the driving motor 21 carried on the frame 12 is interconnected to the caster wheel 16 by an endless belt 22, with controls 26 on the handle 24 for operation thereof.
  • the apparatus is provided with one or more centrifugal wheels 30 enclosed within a protective housing 32.
  • the wheel 30 is generally referred to as a centrifugal blasting wheel, of the type well known to the trade, and marketed by Wheclabrator-Frye Inc., of Mishawaka, Indiana, under the name WHEELABRATOR.
  • the wheel is rotated at high speed on an axle 34 driven by an electrical motor 36.
  • rotational movement at high speed can be imparted to the wheel by means of a belt drive which interconnects a pulley on the end of the axle with a motor driven sheave offset from the wheel axis.
  • Abrasive particles are fed from a supply hopper 38 through a feed spout 40 to a cage in the center of the wheel.
  • the cage dispenses the abrasive particles onto the inner end portion of the blades 42 which extend radially outwardly in circumferentially spaced relation from the hub whereby in response to rotational movement of the wheel, the abrasive particles 44 are displaced radially outwardly over the surfaces of the blades and thrown with high centrifugal force from the ends of the blades in a direction controlled by the case. rate of flow of particulate material is controlled by a control valve in the feed system.
  • the wheel axle is incline so that the abrasive particles will be thrown from the blades angularly downwardly through a similarly inclined blast corn dor 46 onto the surface 18.
  • the cleaning efficiency and rebound of the abrasive particles, for best recovery, is somewhat dependent upon the angle of inclination at which the abrasive particles strike the surface which angle corresponds to 90° minus the angle of inclination that the wheel axle makes with the horizontal.
  • the angle of inclination that the wheel axle makes with the horizontal should be less than 60° and not less than 10° so that the angle at which the abrasive particles strike the surface will not be less than 30° nor greater than 80° and preferably within the range of 45° to 65°.
  • abrasive particles When the abrasive particles are thrown at high velocity angularly onto the surface, they tend to rebound from the surface at a reflective angle, there is provided a rebound corridor 48 which extends upwardly from the surface, initially at an angle between the reflective angle and 10° to 15° less than the reflective angle.
  • blast corridor 46 and the rebound corridor 48 merge at their lower end portions to provide a downwardly facing opening 49 therebetween, which defines the blast area through which the abrasive particles are thrown onto the surface and from which they rebound for return through the rebound corridor 48.
  • the blast corridor is defined by front and back walls 50 and 52 and side walls 54 while the rebound corridor is defined by front and back walls 56 and 58 and side walls 60,
  • the area is enclosed by resilient skirts 62 which depend from brackets 64 fixed to the lower edge portions of the surrounding walls.
  • the skirt 62 is intended to enclose the area to confine the blast and to prevent ricocheting of abrasive particles to the region outside of the housing.
  • the skirt is characterized by sufficient flexibility to permit abrasive particles, collected on a surface 18, to pass beneath the skirt and to permit air to be drawn about the underside of the skirt from the outside atmosphere into the blast area, as will hereinafter be described.
  • the skirt is formed of a rubber-like material dimensioned to engage the surface or preferably to terminate a short distance above the surface to permit the inflow of air from the surrounding atmosphere into the blast area.
  • a rebound corridor perferably of curvilinear contour from the entrance end portion at the bottom to the exit end portion at the top, wherein the cross sectional area of the rebound corridor remains substantially constant throughout its length.
  • the kinetic energy of rebound upon striking the surface is sufficient to enable the particles completely to traverse the rebound corridor, especially when formed of curvilinear shape for smooth and uninterrupted flow from the struck surface 18 to the outlet end of the rebound corridor and with normal air flow induced by the rapidly rotating wheel and/or the flow of air into the blast area from the surrounding atmosphere as induced by the exhaust fan of the dust separator communicating with the exhaust end portion of the rebound corridor, as will hereinafter be described.
  • the rebound corridor is of constant cross section substantially throughout its length, the width corresponds with the width of the blast opening, as shown in figure 3, to enable entry of the abrasive or other particles striking the surface 18.
  • the cost of the machine is reduced while the rebounding particles tend to flow with less turbulence during traverse of the rebound corridor for return to the hopper feeding the wheel,
  • the upper outlet end 70 of the rebound corridor 48 empties into an expansion chamber 72. Separation of the abrasive particles 46 from the dust and dirt is effected in the expansion chamber by means of an air stream drawn by an exhaust fan 74 having its inlet duct 76 in communication with the upper end portion of the expansion chamber 72, and its outlet duct; 76 connected to a conventional dust collector (not shown) for removal of dust and dirt before exhaust into the atmosphere.
  • the heavier abrasive particles 46 settle gravitationally for return to the hopper 38 while the entrained dust and dirt rises with the air stream for exhaust from the machine.
  • a trailing auxiliary pickup unit such as a vacuum cleaner, magnetic drum, rotating brush or the like. It will be understood that the power requirement for operating such auxiliary unit to pick up the small amount of abrasive particles remaining on the surface 18 is materially less than the power that would otherwise be required fully to recover the abrasive particles within the . blast unit itself.
  • the rebound corridor When adapted to operate on horizontally disposed surfaces, it is preferred that the rebound corridor extend curvilinearly upwardly through an angle of about 180° and preferably through an angle of 180-210° to the horizontal so that it will terminate in an end portion which extends horizontally into the expansion chamber or angularly downwardly in the direction of the hopper 38, as illustrated in figure 1.
  • the rebound corridor can be formed with an initially relatively straight portion extending at the desired reflective angle, but terminating at its upper end either in a return curvilinear portion for smoothly guiding the rebounding particles into the expansion chamber or in an angled deflector plate for deflecting the abrasive particles inwardly into the expansion chamber.
  • the flow of air into the blast area is induced, in part, by the fan of the dust collector and by the rotation of the blast wheel as well as the abrasive particles traveling ; at high velocity through the blast'chamber whereby subatmospheric conditions exist within the blast chamber.
  • Effective surface treatment is derived, at least in part, by the beat of the abrasive particles thrown sequentially by the radially spaced blades of the wheel, while the latter is rotating at high speed.
  • control means can be provided on the opposite end or both ends of the apparatus for enabling movement in either direction.
  • the machine can be used for treatment of surfaces which are moved at a steady pace after the blast zone for treatment whereby the machine can be stationary or otherwise manipulated over such moving surface.
  • an apparatus for the treatment of surfaces in which utilization is made of kinetic energy resident in the abrasive particles to enable recovery of the abrasive particles in an efficient and economical manner whereby size, weight and cost of the unit can be greatly reduced, while providing greater maneuverability, by hand or by power operated means, over the surface to be treated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
EP81300153A 1981-01-14 1981-01-14 Transportable Einrichtung zur Oberflächenbehandlung Withdrawn EP0056176A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP81300153A EP0056176A1 (de) 1981-01-14 1981-01-14 Transportable Einrichtung zur Oberflächenbehandlung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81300153A EP0056176A1 (de) 1981-01-14 1981-01-14 Transportable Einrichtung zur Oberflächenbehandlung

Publications (1)

Publication Number Publication Date
EP0056176A1 true EP0056176A1 (de) 1982-07-21

Family

ID=8188185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81300153A Withdrawn EP0056176A1 (de) 1981-01-14 1981-01-14 Transportable Einrichtung zur Oberflächenbehandlung

Country Status (1)

Country Link
EP (1) EP0056176A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0391440A2 (de) * 1989-04-07 1990-10-10 Tilghman Wheelabrator Limited Tragbares Schleuderstrahlgerät
WO2021003020A1 (en) * 2019-07-02 2021-01-07 National Flooring Equipment, Inc. Valve mount for shot blaster plenum valve
CN115635422A (zh) * 2022-12-26 2023-01-24 北京东方昊为工业装备有限公司 一种机器人联动颗粒物回收装置的控制系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3034262A (en) * 1959-11-05 1962-05-15 Eugene T Pawlson Resurfacing and finishing machine
US3900969A (en) * 1974-02-19 1975-08-26 Wheelabrator Frye Inc Portable apparatus for blast cleaning
DE2708528A1 (de) * 1976-03-01 1977-09-15 Wheelabrator Frye Inc Tragbare vorrichtung zur behandlung von oberflaechen
US4052820A (en) * 1976-01-21 1977-10-11 Wheelabrator-Frye, Inc. Portable surface treating apparatus
US4080760A (en) * 1977-02-18 1978-03-28 Wheelabrator-Frye Inc. Surface treatment device including magnetic shot separator
US4202142A (en) * 1978-07-17 1980-05-13 Wheelabrator-Frye Inc. Abrasive particle blast apparatus for surface treatment
GB1575477A (en) * 1977-02-23 1980-09-24 Wheelabrator Frye Inc Portable device for treating surfaces

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3034262A (en) * 1959-11-05 1962-05-15 Eugene T Pawlson Resurfacing and finishing machine
US3900969A (en) * 1974-02-19 1975-08-26 Wheelabrator Frye Inc Portable apparatus for blast cleaning
US4052820A (en) * 1976-01-21 1977-10-11 Wheelabrator-Frye, Inc. Portable surface treating apparatus
DE2708528A1 (de) * 1976-03-01 1977-09-15 Wheelabrator Frye Inc Tragbare vorrichtung zur behandlung von oberflaechen
US4080760A (en) * 1977-02-18 1978-03-28 Wheelabrator-Frye Inc. Surface treatment device including magnetic shot separator
GB1575477A (en) * 1977-02-23 1980-09-24 Wheelabrator Frye Inc Portable device for treating surfaces
US4202142A (en) * 1978-07-17 1980-05-13 Wheelabrator-Frye Inc. Abrasive particle blast apparatus for surface treatment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0391440A2 (de) * 1989-04-07 1990-10-10 Tilghman Wheelabrator Limited Tragbares Schleuderstrahlgerät
EP0391440A3 (de) * 1989-04-07 1991-06-12 Tilghman Wheelabrator Limited Tragbares Schleuderstrahlgerät
WO2021003020A1 (en) * 2019-07-02 2021-01-07 National Flooring Equipment, Inc. Valve mount for shot blaster plenum valve
US11628538B2 (en) 2019-07-02 2023-04-18 National Flooring Equipment, Inc. Valve mount for shot blaster plenum valve
CN115635422A (zh) * 2022-12-26 2023-01-24 北京东方昊为工业装备有限公司 一种机器人联动颗粒物回收装置的控制系统
CN115635422B (zh) * 2022-12-26 2023-08-11 北京东方昊为工业装备有限公司 一种机器人联动颗粒物回收装置的控制系统

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EP0056176A1 (de) Transportable Einrichtung zur Oberflächenbehandlung

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Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB NL SE

17P Request for examination filed

Effective date: 19820705

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840117

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BERGH, JOHN C.