EP0090824B1 - Equipment for the treatment of cylindrical hollow structures by means of blast cleaning - Google Patents

Equipment for the treatment of cylindrical hollow structures by means of blast cleaning Download PDF

Info

Publication number
EP0090824B1
EP0090824B1 EP82902984A EP82902984A EP0090824B1 EP 0090824 B1 EP0090824 B1 EP 0090824B1 EP 82902984 A EP82902984 A EP 82902984A EP 82902984 A EP82902984 A EP 82902984A EP 0090824 B1 EP0090824 B1 EP 0090824B1
Authority
EP
European Patent Office
Prior art keywords
treated
wheels
equipment
blasting
pipe
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.)
Expired
Application number
EP82902984A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0090824A1 (en
Inventor
Markku Juhani Fingerroos
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0090824A1 publication Critical patent/EP0090824A1/en
Application granted granted Critical
Publication of EP0090824B1 publication Critical patent/EP0090824B1/en
Expired 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
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks

Definitions

  • the present invention is concerned with an equipment in accordance with the preamble of claim 1.
  • Equipment of this type is used when especially metallic pipes are treated by means of simultaneous inside and outside sand blasting of blast cleaning.
  • Such equipment usually comprises a blast chamber as well as transfer means for shifting the structure to be treated into and out of the blast chamber.
  • the blasting material of steel, quartz, or of any other suitable cleaning material is blasted by means of compressed air through nozzles against the face to be treated.
  • An apparatus according to the precharacterizing features of claim 1 is known from DE-A-2 852 106 being the nearest relevant art.
  • This known apparatus comprises a blast chamber and two transfer wheel sets placed side by side, for shifting the structure to be treated axially into and out of the blast chamber.
  • Each wheel set consists of a plurality of wheels, which are preferably of equal size and which can be rotated in a position oblique to the direction of shifting of the structure to be treated, at least some of which are motor-driven, and on whose support the structure can be, at one time or another, both shifted axially and rotated around its axis.
  • the invention is based, e.g., on the following ideas:
  • the equipment in accordance with the invention is mainly characterized in what is stated in the characterizing part of claim 1.
  • the wheels 2 are, by means of journalling 6, attached to the V-shaped bottom part of the blast chamber so that they can be diverted from their rotating position, in the radial plane, to the transfer position so as to achieve axial shifting of the structure 1.
  • This diverting takes place by means of a longitudinal rod 8, which is connected to a lever 7 related to the journalling of each wheel 2. In this way, all the wheels of both wheel sets 2 are automatically always shifted into the same angular position.
  • the spear device which comprises an upper spear 19 and a lower spear 23, placed directly underneath the upper spear, as well as material feed containers 28 and 30 connected to the said spears, is shifted as one unit into connection with the pipe 1 to be treated.
  • the upper spear 19 moves slowly into the pipe 1 while the pipe revolves, and at the same time the lower spear 23 moves to underneath the pipe 1, while blasting material is blown by means of compressed air through the nozzles 20 and 24, respectively, onto the inner and outer face of the pipe.
  • the compressed-air device which is not shown, is connected to the spears 19 and 23 at points places behind the material feed containers 28 and 30. From these containers 28 and 30, the blasting material has access into the spears 19 and 23 through pipes 29 and 31 and through valves, not shown, placed in the said pipes.
  • the combination of spears and containers moves on the wheel set 32 along rails 33.
  • the lower spear 23 is, by means of a support wheel 25, 26 of its own, arranged so as to be supported at one end against the above V-section bottom groove.
  • the upper spear 19 is, by means of resilient guide wheel sets 21, 22 fitted centrally to move inside the pipe 1.
  • Both of the blasting spears 19 and 23 are dimensioned at least approximately equally and connected to a preferably common pressure source so that the pressure to be used is 5 - 105 to 15 - 10 5 N/m 2 (5 to 15 bars), most appropriately about 10.105 N/m 2 (10 bars).
  • the wheel sets 2 have been arranged so as to make the pipe 1 to be treated rotate at a speed of 20 to 70 r.p.m., preferably about 30 to 40 r.p.m., by the combined effect of the pressure and of the speed of revolution applied, a phenomenon of hovering of the blasting material inside the pipe 1 is produced. This is why the blasting material is automatically removed out of the pipe 1 through one of its ends onto the bottom of the blast chamber 13.
  • the material blasted out of the lower spear 23 likewise falls onto the bottom of the blast chamber 13. All of this material that was used can flow through a longitudinal slot 16 in the bottom 15 of the blast chamber to a, likewise longitudinal, trough 17 placed underneath the bottom 15, a screw conveyor 18 placed in the said trough shifting the material used further for recovery.
  • the level of the lower spear 23 does not necessarily have to be adjusted in accordance with the size of the pipe 1 to be treated.
  • adjustability of the upper spear 19 at the root end may be important in order to give consideration to different pipe sizes, even though the flexible guide wheel sets 21, 22 also automatically take such variations at the nozzle end of the spear 19 into account.
  • the speed of movement of the spear device is preferably continuously adjustable, owing to which the degree of cleaning can be selected freely.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
EP82902984A 1981-10-02 1982-10-01 Equipment for the treatment of cylindrical hollow structures by means of blast cleaning Expired EP0090824B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI813064 1981-10-02
FI813064A FI64904C (fi) 1981-10-02 1981-10-02 Anordning foer straolblaestring av cylindriska ihaoliga konstruktioner

Publications (2)

Publication Number Publication Date
EP0090824A1 EP0090824A1 (en) 1983-10-12
EP0090824B1 true EP0090824B1 (en) 1986-08-20

Family

ID=8514741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82902984A Expired EP0090824B1 (en) 1981-10-02 1982-10-01 Equipment for the treatment of cylindrical hollow structures by means of blast cleaning

Country Status (5)

Country Link
EP (1) EP0090824B1 (fi)
JP (1) JPS58501622A (fi)
DE (1) DE3272741D1 (fi)
FI (1) FI64904C (fi)
WO (1) WO1983001220A1 (fi)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE325489B (fi) * 1968-11-22 1970-06-29 K Magnusson

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB114423A (en) * 1917-03-27 1919-01-30 Birger Meidell Apparatus for the Transmission of Micro-oscillations.
US2604734A (en) * 1950-01-05 1952-07-29 Pangborn Corp Blasting machine
US3151418A (en) * 1963-07-16 1964-10-06 Pangborn Corp Pipe cleaning apparatus
US3427763A (en) * 1966-07-18 1969-02-18 Woma Maasberg Co Gmbh W Method of treating solid surfaces
US3460296A (en) * 1966-10-24 1969-08-12 Xerox Corp Metalworking
DE2852106A1 (de) * 1977-12-16 1979-06-21 Fischer Ag Georg Anlage zur strahlbehandlung von rohren

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE325489B (fi) * 1968-11-22 1970-06-29 K Magnusson

Also Published As

Publication number Publication date
FI64904C (fi) 1984-02-10
EP0090824A1 (en) 1983-10-12
JPS58501622A (ja) 1983-09-29
FI813064L (fi) 1983-04-03
DE3272741D1 (en) 1986-09-25
WO1983001220A1 (en) 1983-04-14
FI64904B (fi) 1983-10-31

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