EP0090824A1 - 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.Info
- Publication number
- EP0090824A1 EP0090824A1 EP82902984A EP82902984A EP0090824A1 EP 0090824 A1 EP0090824 A1 EP 0090824A1 EP 82902984 A EP82902984 A EP 82902984A EP 82902984 A EP82902984 A EP 82902984A EP 0090824 A1 EP0090824 A1 EP 0090824A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- equipment
- treated
- wheels
- pipe
- wheel sets
- 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.)
- Granted
Links
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 or blast cleaning.
- Such equipment usually comprises a blast cham- ber as well as transfer means for shifting the structure to be treated Into and out of the blast chamber.
- the blasting sand 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.
- the outside face of pipes has usually been cleaned manually or by using the same spear device as is used for inside cleaning.
- the object of the present invention is to eliminate the above drawbacks and to provide equipment of an entirely novel type for the treatment of cylindric hollow structures by means of simultaneous inside and outside sand-biastin /blast-cleaning.
- a combined transfer and rotating device which comprises two wheel sets placed side by side, on which wheel sets the structure to be treated rests and can be rotated around its own axis.
- the rotating device is con ⁇ verted into a transfer device, by means of which the structure to be treated can be shifted into and out ' of the blast chamber.
- the equipment comprises a spear device, which comprises two blasting spears, by means of which both inside and outside cleaning of the structure to be treated can be performed simultaneously.
- the pressure used in the blasting spears is chosen sufficiently high and the speed of rotation of the wheel sets appropriate so that the cleaning material is automatically hovering pushed out of the interior of the structure to be treated.
- Figure 1 is a schematical side view of the equipment in accordance with the invention before the beginning of the blasting process.
- Figure 2 shows the equipment of Fig. 1 during the blasting process.
- Figure 3 shows the -equipment in accordance with the invention as viewed from the end placed next to the feeding table.
- Figure ⁇ i shows the equipment in accordance with the invention as a cross section at the blast chamber.
- Figure 5 is a side view showing the relative connections between the sand-feed containers and the blasting spears.
- Figure 6 shows the combination of Fig. 5 as viewed from the end next .to the spear device of the equipment.
- Figure 7 is a side view of the blasting spears at the ends next to the nozzles.
- the spear device which comprises an upper spear 19 and a lower spear 23, placed directly underneath the upper spear, as well as sand-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 under ⁇ neath the pipe 1, while blasting sand is blown by means of compressed air through the nozzles 20 and 24, res ⁇ pectively, onto the inner and outer face of the pipe.
- the compressed-air device which is not shown, is con ⁇ nected to the spears 19 and 23 at points placed behind the sand-feed containers 28 and 30. From these con- tainers 28 and 30, the blasting sand 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 connec ⁇ ted to a preferably common pressure source so that the pressure to be used is 5 to 15 bars, most appropriately about 10 bars.
- the sand blasted out of the lower spear 23 likewise falls onto the bottom of the blast chamber 13- All of this sand that was used can flow through a longitudinal slot I ⁇ in the bottom 15 of the blast chamber to a, likewise longitudinal, trough 17 placed underneath the bottom 15 s a screw con ⁇ veyor 18 placed in the said trough shifting the sand 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)
Abstract
Le traitement de la face intérieure d'un tuyau à l'aide d'un dispositif dit à lance est connu dans l'art antérieur, lequel dispositif à lance est pourvu d'un ou de plusieurs ajutages lesquels progressent axialement par rapport au tuyau à traiter, ce tuyau tournant en même temps autour de son axe à l'aide d'un dispositif de rotation. Cependant, cette solution de l'art antérieur présente l'inconvénient que le sable de soufflage tend à rester dans le tuyau d'où il doit être extrait par un soufflage séparé d'air comprimé. Selon l'invention, un dispositif de transfert et de rotation combinés est utilisé, ce dispositif comprenant deux ensembles de roues (2 à 8) placés côte à côte, la structure (1) à traiter reposant et tournant autour de son propre axe sur ces jeux de roues. Lorsque la position angulaire des roues (2) est modifiée, le dispositif de rotation est converti en un dispositif de transfert, permettant de sortir la structure (1) de la chambre de soufflage ou de la faire pénétrer dans cette chambre de soufflage. L'équipement comprend un dispositif à lance (23) ayant deux lances de soufflage à l'aide desquelles il est possible d'effectuer simultanément le nettoyage de l'intérieur et de l'extérieur de la structure (1) à traiter.The treatment of the inner face of a pipe using a so-called lance device is known in the prior art, which lance device is provided with one or more nozzles which progress axially with respect to the pipe to treat, this pipe rotating at the same time around its axis using a rotation device. However, this solution of the prior art has the disadvantage that the blowing sand tends to remain in the pipe from where it must be extracted by a separate blowing of compressed air. According to the invention, a combined transfer and rotation device is used, this device comprising two sets of wheels (2 to 8) placed side by side, the structure (1) to be treated resting and rotating around its own axis on these wheel sets. When the angular position of the wheels (2) is changed, the rotation device is converted into a transfer device, making it possible to take the structure (1) out of the blowing chamber or to make it enter this blowing chamber. The equipment comprises a lance device (23) having two blowing lances with the help of which it is possible to simultaneously perform the cleaning of the interior and exterior of the structure (1) to be treated.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI813064 | 1981-10-02 | ||
FI813064A FI64904C (en) | 1981-10-02 | 1981-10-02 | ANORDNING FOER STRAOLBLAESTRING AV CYLINDRISKA IHAOLIGA KONSTRUKTIONER |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0090824A1 true EP0090824A1 (en) | 1983-10-12 |
EP0090824B1 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 (en) |
JP (1) | JPS58501622A (en) |
DE (1) | DE3272741D1 (en) |
FI (1) | FI64904C (en) |
WO (1) | WO1983001220A1 (en) |
Family Cites Families (7)
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 |
SE325489B (en) * | 1968-11-22 | 1970-06-29 | K Magnusson | |
DE2852106A1 (en) * | 1977-12-16 | 1979-06-21 | Fischer Ag Georg | Machine for internal jet blasting of pipes - consists of frame with outrigger which carries blasting unit and reaches into pipe |
-
1981
- 1981-10-02 FI FI813064A patent/FI64904C/en not_active IP Right Cessation
-
1982
- 1982-10-01 EP EP82902984A patent/EP0090824B1/en not_active Expired
- 1982-10-01 DE DE8282902984T patent/DE3272741D1/en not_active Expired
- 1982-10-01 JP JP50295482A patent/JPS58501622A/en active Pending
- 1982-10-01 WO PCT/FI1982/000040 patent/WO1983001220A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO8301220A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1983001220A1 (en) | 1983-04-14 |
DE3272741D1 (en) | 1986-09-25 |
FI813064L (en) | 1983-04-03 |
EP0090824B1 (en) | 1986-08-20 |
FI64904C (en) | 1984-02-10 |
JPS58501622A (en) | 1983-09-29 |
FI64904B (en) | 1983-10-31 |
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Legal Events
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