GB2281520A - Separation of re-usable abrasive particles by impact against baffle in suction chamber - Google Patents

Separation of re-usable abrasive particles by impact against baffle in suction chamber Download PDF

Info

Publication number
GB2281520A
GB2281520A GB9318483A GB9318483A GB2281520A GB 2281520 A GB2281520 A GB 2281520A GB 9318483 A GB9318483 A GB 9318483A GB 9318483 A GB9318483 A GB 9318483A GB 2281520 A GB2281520 A GB 2281520A
Authority
GB
United Kingdom
Prior art keywords
chamber
abrasive particles
dust
abrasive
particles
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Withdrawn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
GB9318483A
Other versions
GB9318483D0 (en
Inventor
David Brierley
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.)
MACBRIDE THOMAS JOSEPH
Original Assignee
MACBRIDE THOMAS JOSEPH
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 MACBRIDE THOMAS JOSEPH filed Critical MACBRIDE THOMAS JOSEPH
Priority to GB9318483A priority Critical patent/GB2281520A/en
Publication of GB9318483D0 publication Critical patent/GB9318483D0/en
Publication of GB2281520A publication Critical patent/GB2281520A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B07B4/04—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall in cascades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/04—Selective separation of solid materials carried by, or dispersed in, gas currents by impingement against baffle separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning In General (AREA)

Abstract

Apparatus for recovery and cleaning of abrasive particles which have been used in an abrasive blasting operation comprises a chamber 10 exhausted by supplying compressed air through a venturi tube, a vacuum hose 12 extending from said chamber for gathering used material from the abrasive blasting operation, baffle plate 17 within said chamber for separating re-useable abrasive particles from dust, a storage compartment 21 for collecting re-useable abrasive particles and hose 25 for discharge of said dust from said chamber. Heavy dust particles pass over the edge of angularly-adjustable baffle plate 18 and are directed by partition 22 into pipe 23. Lighter dust particles are discharged from the venturi unit through hose 25. <IMAGE>

Description

APPARATUS FOR RECOVERY AND CLEANING OF ABRASIVE PARTICLES IN ABRASIVE BLASTING OPERATIONS This invention concerns apparatus for the recovery and cleaning of abrasive particles such as grit or shot which have been used in abrasive blasting operations.
When blasting, the abrasive particles are entrained in a high velocity air stream and ejected through a nozzle against the work-piece. The particles and materials removed from the work-piece accumulate on the floor. Traditionally such accumulations are removed by shovelling from time to time for re-use, but they become increasingly contaminated with dust and must eventually be discarded even though potentially re-usable abrasive material remains present.
It is an object of the present invention to provide apparatus for recovery of abrasive particles which have been used in an abrasive blasting operation, which can be powered by the same air compressor as used in the blasting operation itself, giving controlled searation of light and heavy dust from cleaned abrasive.
According to the present invention there is provided apparatus for recovery and cleaning of abrasive particles which have been used in an abrasive blasting operation comprising a chamber, means for exhausting said chamber by supply of compressed air through a venturi tube, a vacuum hose extending from said chamber for gathering used material from an abrasive blasting operation, baffle means within said chamber for separating re-usable abrasive particles from dust, a storage compartment for collecting said re-usable abrasive particles and means for discharge of said dust from said chamber.
Pipe means may be provided for discharge of heavier dust whilst the remainder leaves the chamber with the air drawn from the chamber by the venturi tube.
The storage compartment may sealably connect with the top of a blast pot, there being a dump valve between the two.
The invention will be further apparent from the following description with reference to the single figure of the accompanying drawing, which shows, by way of example only, a side elevation of one form of apparatus embodying same.
Referring now to the drawing it will be seen that the apparatus comprises a chamber 10 which can be exhausted by supply of compressed air through a venturi unit 11. The compressed air will be supplied at a rate of 9 cubic metres per minute (225 cfm) or thereabouts and at a pressure of 689 kPa (100 psi) or thereabouts.
A flexible hose 12 extends from the chamber 10 to a nozzle 13 having a grid 14 over its open end and an internal pipe 15 whose upper end is open to atmosphere to prevent clogging. Additionally pressure air may be supplied via a valve 40 to an inwardly directed jet nozzle 41 in the main nozzle 13 to give further air flow.
In use the hose 12 is used to transfer by vacuum suction abrasive material which has been used in a blasting operation.
Such material is projected against a shield 16 within the chamber 10 and then is directed downwardly by an inclined baffle plate 17 before moving horizontally with the air stream towards the upper edge of a further baffle plate 18 whose angular position may be adjusted by handle means 19 outside the chamber 10.
Heavier particles, which is to say re-usable abrasive particles drop from the air stream before reaching the edge of the plate 18 to fall through the chamber 10 and a seive 20 (to retain oversize material) into a storage compartment 21.
Heavy dust particles pass over the edge of the plate 18 to drop from the air stream as its velocity falls and are directed by a partition 22 into a discharge pipe 23 whose lower end is closed by a mechanically biassed flap valve 24. When the weight of dust in the pipe 23 reaches a certain level the valve 24 opens automatically to discharge dust.
Lighter dust particles remaining in the air stream are discharged from the venturi unit through a hose 25 leading to a dust arrester, water tank or the like.
The compartment 21 is sealed against the upper rim of a blast pot 30 by a seal 31, the blast pot being raised by jacks 32 into engagement with the seal 31.
A dump valve 33 in the top of the blast pot 30 may be opened by lowering pressure within the blast pot 30 the enable particles to flow from the compartment 21 into the blast pot 30 for re-use.
It will be understood that a single air compresssor can be used for blasting and for gathering the used abrasive particles for re-use after the blasting operation.
It will be appreciated that it is not intended to limit the invention to the above example only, many variations, such as might readily occur to one skilled in the art, being possible, without departing from the scope thereof.
Thus, for example, the hose 12 need not terminate in a suction nozzle, and may communicate with a small chamber having an opening which can be placed against work to be blasted, a blast nozzle being directed through the chamber towards the opening, whereby the abrasive particles are collected as they are used. A seal such as a double brush seal may surround the opening to seal the chamber against the work.

Claims (3)

1. Apparatus for recovery and cleaning of abrasive particles which have been used in an abrasive blasting operation comprising a chamber, means for exhausting said chamber by supply of compressed air through a venturi tube, a vacuum hose extending from said chamber for gathering used material from an abrasive blasting operation, baffle means within said chamber for separating re-useable abrasive particles from dust, a storage compartment for collecting said re-useable abrasive particles and means for discharge of said dust from said chamber.
2. Apparatus according to claim 1 wherein means is provided for discharge of heavier dust whilst the remainder leaves the chamber with the air drawn from the chamber by the venturi tube.
3. Apparatus according to claim 1 or claim 2 wherein the storage compartment is sealably connected with the top of a blast pot, there being a dump valve between the two.
GB9318483A 1993-09-07 1993-09-07 Separation of re-usable abrasive particles by impact against baffle in suction chamber Withdrawn GB2281520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9318483A GB2281520A (en) 1993-09-07 1993-09-07 Separation of re-usable abrasive particles by impact against baffle in suction chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9318483A GB2281520A (en) 1993-09-07 1993-09-07 Separation of re-usable abrasive particles by impact against baffle in suction chamber

Publications (2)

Publication Number Publication Date
GB9318483D0 GB9318483D0 (en) 1993-10-20
GB2281520A true GB2281520A (en) 1995-03-08

Family

ID=10741599

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9318483A Withdrawn GB2281520A (en) 1993-09-07 1993-09-07 Separation of re-usable abrasive particles by impact against baffle in suction chamber

Country Status (1)

Country Link
GB (1) GB2281520A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000061874A1 (en) * 1999-04-14 2000-10-19 Futurepump Ltd. Vacuum apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110695858B (en) * 2019-11-28 2021-12-03 万金芬 But pipeline sand blasting machine of cyclic utilization buddha's warrior attendant gravel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934088A (en) * 1961-10-17 1963-08-14 Vacu Blast Ltd Improvements in or relating to abrasive-blasting systems
GB1122705A (en) * 1966-09-16 1968-08-07 Kenneth Langshaw Whitaker Improvements in or relating to apparatus for separating solid particles entrained in a gas stream
US4306891A (en) * 1980-03-17 1981-12-22 Clarke's Sheet Metal, Inc. Separator for precipitating particulate from an airflow
GB2167681A (en) * 1984-12-04 1986-06-04 Uk Asbestos Plant & Mach Separator
WO1994016995A1 (en) * 1993-01-19 1994-08-04 Cabot Corporation Fine particle classifier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934088A (en) * 1961-10-17 1963-08-14 Vacu Blast Ltd Improvements in or relating to abrasive-blasting systems
GB1122705A (en) * 1966-09-16 1968-08-07 Kenneth Langshaw Whitaker Improvements in or relating to apparatus for separating solid particles entrained in a gas stream
US4306891A (en) * 1980-03-17 1981-12-22 Clarke's Sheet Metal, Inc. Separator for precipitating particulate from an airflow
GB2167681A (en) * 1984-12-04 1986-06-04 Uk Asbestos Plant & Mach Separator
WO1994016995A1 (en) * 1993-01-19 1994-08-04 Cabot Corporation Fine particle classifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000061874A1 (en) * 1999-04-14 2000-10-19 Futurepump Ltd. Vacuum apparatus

Also Published As

Publication number Publication date
GB9318483D0 (en) 1993-10-20

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)