WO1998035787A1 - Verfahren und vorrichtung zum einschlämmen von feuchtem strahlmittel in einen strahlkessel - Google Patents
Verfahren und vorrichtung zum einschlämmen von feuchtem strahlmittel in einen strahlkessel Download PDFInfo
- Publication number
- WO1998035787A1 WO1998035787A1 PCT/DE1998/000193 DE9800193W WO9835787A1 WO 1998035787 A1 WO1998035787 A1 WO 1998035787A1 DE 9800193 W DE9800193 W DE 9800193W WO 9835787 A1 WO9835787 A1 WO 9835787A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- line
- overflow
- hopper
- sieve
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
- B24C7/0038—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier the blasting medium being a gaseous stream
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/54—Mixing liquids with solids wetting solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
- B24C7/003—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with means for preventing clogging of the equipment
Definitions
- the invention relates to a method and a corresponding device according to the preambles of claims 1 and 9.
- Such methods are used using the appropriate devices in slurry blasting for the renovation of, in particular, structures made of steel, concrete and masonry, the blasting medium being separated from impurities and oversize particles at the same time.
- the facilities for sandblasting by gravity or pressure blasting essentially consist of a funnel-shaped blasting bowl and a hopper placed on the blast pot.
- the filling funnel and the blasting bowl are connected to each other via a relatively small passage opening, which is closed with a sealing cone during the blasting process.
- the filling funnel is equipped with a sieve for the separation of oversized abrasive components or other impurities and with a nozzle body for the added water, whereby the sieve and the nozzle body can each be designed individually or as a common component and the sieve can be fixed or vibratable.
- the jet boiler has a deepest outlet with a downstream mixing valve. This mixing valve is connected to the propellant line leading to the jet nozzle.
- the blasting media is first placed on the sieve and sprayed with water from the nozzle body.
- the moistened blasting agent slides through the passage opening into the blasting pot.
- Low-profile filling funnels are more user-friendly, but because of the relatively flat bottom they have an insufficient slip ability for the blasting agent, which hinders the slurrying process.
- a funnel with a flat bottom is described in DE 44 30 133 AI for a pressurized jet boiler.
- a fixed sieve with a water ring line is designed as a component in the filling funnel, the water ring line having nozzles directed towards the filling opening.
- the blasting agent which was initially still dry, is no longer moistened by the water jets, but by the outstanding water level.
- the water jets distribute and transport the abrasive sludge only through the small passage opening. This no longer requires such high water jet pressures in the nozzle ring line and also leads to improved mixing and slurrying behavior.
- the effort to realize the required dynamic pressure in the blasting boiler is extremely low. This dynamic pressure can also be achieved with very little effort by throttling in the overflow line, either by a siphon-like design or / and by a shut-off valve throttling in the open position.
- a pulsation of the water level or the water supply in the filling funnel is particularly advantageous. This promotes the solution of the dry incrustation of the abrasive and significantly supports the throughput of the abrasive through the sieve.
- the figure shows a diagram of a blasting device with an unpressurized blasting vessel.
- This blasting device mainly consists of a blasting vessel 1 in a funnel-shaped design with an outlet connection 2 at the bottom, which is followed by an adjustable mixing valve 3 and an overflow connection 4 located in the upper region of the blasting vessel 1 with a downstream shut-off valve 5.
- a Filling funnel 6 placed and flanged, both of which are connected to one another by a relatively small passage opening 7 and this passage opening 7 is designed to be closable by a closing cone 8.
- a nozzle ring line 9 is used, which has a connection to a water pump 13 via a water inlet connection 10, a shut-off valve 11 and a pressure line 12.
- the nozzles are arranged in the nozzle ring line 9 in such a way that they form jets directed towards the passage opening 7.
- the slurrying process is further accelerated when the jets hit the passage opening 7 tangentially and thereby form a vortex in the water bath in the filling funnel 6.
- This nozzle ring line 9 also serves as a support for a stationary screen 14 with a predetermined mesh size, the screen 14 preferably being arched in a sagging manner.
- the nozzle ring 9 can also have a separate suspension for the screen 13.
- An overflow line 15 leads from the shut-off valve 5 of the overflow connection 4 to a water reservoir 16 which is connected to the water pump 13 via a suction line 17.
- a filter element 18 is preferably inserted in the water storage container 16.
- the overflow line 15 is designed like a siphon in such a way that the highest point of the overflow line 15 which determines the water level is aligned with a height above the sieve 14 in the filling funnel 6.
- the water pump 13 has a pneumatic drive 19, which is supplied by a motor-driven compressor 20. This compressor 20 is also connected to a jet nozzle 23 via a shut-off valve 21 and a propellant line 22.
- a blasting agent line 24 coming from the mixing valve 3 of the blasting boiler 1 opens into the blowing agent line 22.
- the compressor 20 is first switched on and thus the propellant line 22 is supplied with air and, by simultaneously driving the water pump 13, the pressure line 12 is supplied with water.
- the shut-off valves 11 and 21 are still closed.
- shut-off valve 11 By opening the shut-off valve 11, water is pumped out of the water storage container 16 and reaches the water inlet connection 10 and thus to the nozzle ring line 9 under pressure. The water exits there in the form of a jet and flows through the passage opening 7 into the jet boiler 1. Blasting agent is then placed on the sieve 14, so that the blasting agent initially falls partly through the action of the water jet through the sieve 14 and is flushed from the flowing water in the filling funnel 6 through the passage opening 7 into the blasting vessel 1. The water level in the jet boiler rises until the water flows into the water reservoir 16 via the siphon-like overflow line 15, whereby the water circuit is closed for the filling process. The overflow line 15 is set so that the water level in the hopper 6 covers the sieve 14.
- blasting agent seeps automatically in the vortex of the water bath in the filling funnel 6 through the sieve 14 onto the bottom of the filling funnel 6 and is washed into the blasting kettle 1 by the flowing water, where it settles on the bottom.
- the filling process is ended when the desired amount of abrasive is in the blasting vessel 1. Then the passage opening 7 is closed with the closing cone 8 and the blasting process can begin.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98906831A EP1007281A1 (de) | 1997-02-13 | 1998-01-22 | Verfahren und vorrichtung zum einschlämmen von feuchtem strahlmittel in einen strahlkessel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19705401.3 | 1997-02-13 | ||
| DE19705401A DE19705401A1 (de) | 1997-02-13 | 1997-02-13 | Verfahren und Vorrichtung zum Einschlämmen von feuchtem Strahlmittel in einen Strahlkessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998035787A1 true WO1998035787A1 (de) | 1998-08-20 |
Family
ID=7820058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1998/000193 Ceased WO1998035787A1 (de) | 1997-02-13 | 1998-01-22 | Verfahren und vorrichtung zum einschlämmen von feuchtem strahlmittel in einen strahlkessel |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1007281A1 (de) |
| DE (1) | DE19705401A1 (de) |
| WO (1) | WO1998035787A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1208944A1 (de) * | 2000-11-24 | 2002-05-29 | ANT Applied New Technologies AG | Verfahren zum Befüllen eines Druckbehälters und Vorrichtung zur Erzeugung eines Strahls einer Suspension |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB731117A (en) * | 1952-05-31 | 1955-06-01 | Mariblast Corp | Method and apparatus for feeding a fluid abrading material |
| WO1987002290A1 (en) * | 1985-10-10 | 1987-04-23 | The British Hydromechanics Research Association | Feeding abrasive material |
| EP0338509A1 (de) * | 1988-04-22 | 1989-10-25 | STERN, Leif Einar | Vorrichtung zum Reinigen von Fahrzeugrädern |
| EP0359701A2 (de) * | 1988-09-16 | 1990-03-21 | Daniel Mattmann | Verfahren und Vorrichtung zum Sand-Aufbereiten und -Recyclieren für das Wasser-Hochdruck-Sandstrahlen |
| DE9103701U1 (de) * | 1991-03-26 | 1991-07-04 | Abrex Oberflächentechnik GmbH, 2330 Windeby | Feuchtsandstrahler |
| US5195280A (en) * | 1987-04-09 | 1993-03-23 | Gagemarch Limited | Abrasive blasting apparatus |
| US5283991A (en) * | 1992-09-08 | 1994-02-08 | Josef Keizers | Sandblasting method and a moist-sand blasting apparatus |
| DE4430133A1 (de) * | 1994-08-25 | 1996-02-29 | Hubert Busch | Strahlkessel für Trocken- und Naßstrahlverfahren |
-
1997
- 1997-02-13 DE DE19705401A patent/DE19705401A1/de not_active Withdrawn
-
1998
- 1998-01-22 EP EP98906831A patent/EP1007281A1/de not_active Ceased
- 1998-01-22 WO PCT/DE1998/000193 patent/WO1998035787A1/de not_active Ceased
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB731117A (en) * | 1952-05-31 | 1955-06-01 | Mariblast Corp | Method and apparatus for feeding a fluid abrading material |
| WO1987002290A1 (en) * | 1985-10-10 | 1987-04-23 | The British Hydromechanics Research Association | Feeding abrasive material |
| US5195280A (en) * | 1987-04-09 | 1993-03-23 | Gagemarch Limited | Abrasive blasting apparatus |
| EP0338509A1 (de) * | 1988-04-22 | 1989-10-25 | STERN, Leif Einar | Vorrichtung zum Reinigen von Fahrzeugrädern |
| EP0359701A2 (de) * | 1988-09-16 | 1990-03-21 | Daniel Mattmann | Verfahren und Vorrichtung zum Sand-Aufbereiten und -Recyclieren für das Wasser-Hochdruck-Sandstrahlen |
| DE9103701U1 (de) * | 1991-03-26 | 1991-07-04 | Abrex Oberflächentechnik GmbH, 2330 Windeby | Feuchtsandstrahler |
| US5283991A (en) * | 1992-09-08 | 1994-02-08 | Josef Keizers | Sandblasting method and a moist-sand blasting apparatus |
| DE4430133A1 (de) * | 1994-08-25 | 1996-02-29 | Hubert Busch | Strahlkessel für Trocken- und Naßstrahlverfahren |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1007281A1 (de) | 2000-06-14 |
| DE19705401A1 (de) | 1998-08-20 |
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