EP1053077A1 - Strahlmittel-injektorpistole - Google Patents
Strahlmittel-injektorpistoleInfo
- Publication number
- EP1053077A1 EP1053077A1 EP99907398A EP99907398A EP1053077A1 EP 1053077 A1 EP1053077 A1 EP 1053077A1 EP 99907398 A EP99907398 A EP 99907398A EP 99907398 A EP99907398 A EP 99907398A EP 1053077 A1 EP1053077 A1 EP 1053077A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressed air
- gun according
- closing valve
- actuating element
- opening
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 230000033001 locomotion Effects 0.000 claims description 39
- 238000005422 blasting Methods 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000003380 propellant Substances 0.000 claims description 6
- 239000004604 Blowing Agent Substances 0.000 claims description 3
- 239000003082 abrasive agent Substances 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
- B24C7/0084—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a mixture of liquid and gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
-
- 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
Definitions
- the invention relates to a blasting agent injector gun with separate feeds for compressed air, water and blasting agent and an outlet for the blasting agent mixed with compressed air and water.
- Such an injector gun is known for example from DE 90 00 178 UI. Air and blasting media are mixed in the gun, then water is added to this dry air / blasting media mixture.
- this object is achieved according to the invention in that a first mixing device is provided in which water is added to the compressed air, and a second mixing device in which the blasting agent is added to the compressed air / water mixture.
- the first mixing device is an injector with the compressed air flow as the propellant flow.
- the water can be admixed with the compressed air flow, preferably water with line network pressure can be used here, that is, with a pressure of, for example, 6 to 12 bar.
- the second mixing device is an injector with the compressed air / water flow as the propellant flow.
- an injector leads to a particularly uniform mixing of the compressed air / water flow on the one hand with the blowing agent flow on the other hand and thus to the desired enveloping effect of the individual abrasive particles.
- the compressed air supply and the water supply are closed with closing valves and that an opening device is provided for these closing valves - 3 -
- Such an opening device ensures that water is only pumped when there is a stream of compressed air, so there is no possibility of liquid, non-atomized water entering the gun. This also ensures that the blowing agent flowing through the gun in the suction area of the abrasive particles contains water only in an amount which leads to very fine atomization, so that no wet abrasive is released, but only moistened one.
- the opening device comprises a movable actuating element which first opens the closing valve of the compressed air supply and then the closing valve of the water supply during an opening movement.
- a movable actuating element ensures that the compressed air supply is always opened first, and the water supply is only opened when the compressed air supply is already open.
- the opening points of the two closing valves can be adjusted along the opening movement of the actuating element. This gives the possibility to ensure that the closing valves open successively in time, even with structural tolerances.
- the strength of the compressed air flow at which the water supply should start can be selected.
- the operative connection between the actuating element and the closing valve of the water supply can optionally be switched on and off, so that the actuating element either opens the closing valve of the water supply during its opening movement after the closing valve of the compressed air supply or keeps it permanently closed.
- the user thus has the choice of whether he wants to generate a stream of compressed air when water is mixed with the actuation of the actuating element or a completely dry stream of compressed air. If he wants the water supply, it is only opened when the compressed air flow is open, but if a water supply is not desired, only the closing valve of the compressed air supply is opened by actuating the actuating element, but not the closing valve of the water supply.
- a movement transmission element is provided for switching the active connection on or off, which transmits the movement of the actuating element to the closing valve of the water supply in the switched-on state, but is positioned in the switched-off state in such a way that such a movement transmission is not possible .
- the motion transmission element is a plunger which is displaceably mounted in a guide and which, when switched on, forms a thrust transmission element between the actuating element and the closing valve of the water supply.
- the guide with the plunger can be displaceable in the pistol between an activated and an deactivated position.
- the plunger When the plunger is in the transfer position, it can transmit a pushing movement to the closing valve, but when it is moved out of this transfer position, the power transmission between the actuating element and the closing valve of the water supply is interrupted, so that the closing valve does not open even when the actuating element moves the water supply takes place.
- the actuating element for opening the closing valve of the water supply comes to rest with a driver on a stop of the closing valve and if there is a distance between the driver and the stop at the beginning of the opening movement of the actuating element, which distance during the opening movement of the actuating element up to the system reduced. This ensures that the closing valve of the water supply is not yet opened at the start of the opening movement of the actuating element, but that this opening only begins when the actuating element has already completed part of its opening movement.
- the initial distance of the driver from the stop can be adjustable, so that it can also be selected when the opening valve of the water supply is opened along the opening movement of the actuating element.
- the driver is loaded in a guide fixed to the pistol. - 6 -
- Gerter tappet which optionally transfers a thrust force to a valve body of the closing valve of the water supply with the interposition of a removable tappet.
- a metering valve is arranged in the water supply, so that the user can choose how strongly the compressed air stream is moistened.
- the maximum opening cross section of the closing valve of the compressed air supply is adjustable. The user has the possibility to adjust the strength of the compressed air flow.
- the opening device of the closing valve of the compressed air supply comprises a movable actuating element, which opens the closing valve of the compressed air supply during its opening movement so that its opening cross section increases continuously until the end of the opening movement of the actuating element, and that the opening of the closing valve begins lengthways the opening movement of the actuating element is adjustable, so that a different opening cross section of the closing valve can be reached by the end of the opening movement of the actuating element.
- the actuating element has a driver which bears against an adjustable stop of the closing valve.
- this stop can be screwed onto a tension rod, which with - 7 -
- a valve body of the closing valve of the compressed air supply is connected.
- stop is adjustable between two end positions, in particular these end positions can in turn be adjustable.
- an end position can be determined by a nut screwed onto the tension rod, which limits the screwing movement of the stop screwed onto the tension rod.
- a different end position is determined by a threaded plug screwed into the stop, to which the pull rod strikes at the end during the screwing movement of the stop.
- the actuating element on the pistol can be of any design, but the design as a pivot lever is advantageous.
- the swivel lever is rotatably mounted between two thrust elements which are displaceably mounted parallel to one another in the pistol and the push elements are displaced in the opposite direction during its swiveling movement and if the swivel elements open the closing elements of the compressed air supply or the water supply in the process. It then turns out - 8th -
- a metered closable false air opening is arranged in the blasting agent supply, so that the amount of blasting agent sucked in by a certain compressed air / water flow is also to be metered.
- Figure 1 is a longitudinal sectional view through an injector gun
- FIG. 2 is a partial longitudinal sectional view of the gun of Figure 1 with closed closing valves for compressed air supply and water supply;
- FIG. 3 shows a view similar to FIG. 2 with the closing valves for compressed air supply and water supply open;
- Figure 4 is a sectional view taken along line 4-4 in Figure 2 and
- Figure 5 is a sectional view taken along line 5-5 in Figure 2.
- the injector gun 1 shown in the drawing comprises a two-shell housing 2 with two downwards - 9 -
- a valve block 6 is arranged in the interior of the housing 2 and has a blind hole 7 which widens in stages.
- This valve body 9 is connected to an actuating rod 10, which emerges from the valve block 6 through a longitudinal bore 11 at the end of the blind bore 7 and which is surrounded in the interior of the blind bore 7 by a coil spring 12, which supports the valve body 9 at the bottom of the blind bore 7 seals against the valve seat 8.
- valve body 9 and the valve seat 8 together form a closing valve 13 for a compressed air flow which enters the rear part of the blind bore 7 via a compressed air line 14 passing through the front handle 3.
- the compressed air supplied through this compressed air line 14 from a compressed air source, not shown in the drawing, can flow out through the front part of the blind hole 7 when the closing valve 13 is open.
- a sleeve-shaped insert 15 is inserted, which protrudes from the housing 2 and there carries a tubular extension 16, into which a nozzle body 17 is inserted with a narrowing through opening 18.
- the tubular extension 16 surrounds between the insert 15 and the nozzle body 17 arranged at a distance therefrom a cylindrical mixing chamber 19 into which a supply line 20 for an abrasive, for example for sand, opens substantially radially.
- a sleeve 21 is mounted so as to be longitudinally displaceable, which in one position closes a false air opening 22 in the wall of the supply line 20, but in the other position releases it and thus creates a connection between the interior of the supply line 20 and the environment.
- This pipe section 23 forms an injector.
- the closing valve 13 When the closing valve 13 is open, compressed air flows through the compressed air line 14 and the pipe section 23 and finally exits the gun through the through opening 18.
- the resulting compressed air flow entrains blasting medium particles from the supply line 20 in the mixing chamber 19, which mix evenly with the compressed air and finally exit through the nozzle body 17 as a homogeneous mixture.
- a second mixing chamber 24 is formed in the blind hole 7 between the annular valve seat 8 on the one hand and the insert 15 which ends at a distance therefrom, into which a supply line 25 for water opens laterally.
- the central opening narrows in the flow direction of the compressed air stream, so that thereby an injector is formed in the area of the mixing chamber 24, which sucks water conveyed through the supply line 25 when compressed air flows through and in the area of the subsequent pipe section 23 homogeneously with the Compressed air flow mixed.
- the water is atomized and torn into the smallest droplets, so that in the area of the mixing chamber 19 a propellant stream is produced which consists of humidified compressed air in which the smallest droplets are homogeneously distributed in a compressed air stream.
- a conical closing body 28 is inserted into the supply line 25 for the water shortly before the confluence with the mixing chamber 24 in a conical bore 27 running transversely to the supply line 25, which closing body 28 is immersed in the conical bore when fully immersed
- the closing body 28 closes the feed line 25 and releases the feed line 25 with increasing cross section when it is pulled out of the conical bore 27, the closing body 28 thus forms a metering valve in the feed line 25.
- the closing body 28 is connected to a shaft 29 emerging laterally from the housing 2, which is screwed into a lateral threaded bore 30 of the valve block 6 and which is screwed more or less deeply into the threaded bore 30 by means of a rotary handle 31 can be.
- a further blind hole 34 which also extends stepwise towards the front, is arranged in the valve block 6, from which the supply line 25 for water emerges in the region of the closed end.
- a bore 35 which is arranged in the valve block 6, opens into the latter and in turn is connected to a bore 36 in the valve block which runs at an angle thereto (FIG. 4).
- This bore 36 is connected to a water connection 37 on the underside of the valve block 6 (FIGS. 1 to 3).
- the blind hole 34 is closed by means of a threaded plug 38 and receives a closing valve 39 with an annular valve seat 40 and a valve body 41 which is mounted to be longitudinally displaceable in the blind hole. This is pressed against the valve seat 40 by a helical spring 42 supported on the threaded plug 38 and can be lifted off the latter by an actuating rod 43 which is connected in one piece to the valve body 41 and which comes out of the valve block 6 through a longitudinal bore 44 in the bottom of the blind bore 34 protrudes sealed.
- valve body 41 As long as the valve body 41 is sealingly seated on the valve seat 40, the water supply to the mixing chamber 24 is interrupted, but if the valve body 41 is lifted against this valve seat 40 against the action of the coil spring 42, water can flow from the water connection 37 via the bores 36 and 35 and the blind hole 34 get to the feed line 25 and from there into the mixing chamber 24.
- the two closing valves 13 and 39 are actuated via a swivel lever 45 which is located inside the - 13 -
- Housing 2 is pivotally mounted and which protrudes downward from the housing 2 between the handles 3 and 4.
- the pivot bearing 46 is arranged between the longitudinal axes of the blind hole 7 on the one hand and the blind hole 34 on the other hand, the pivot axis is perpendicular to these longitudinal axes.
- the actuating rod 10 of the valve body 9 passes through the pivot lever 45 with play and protrudes from the housing 2 at the rear end thereof.
- a sleeve 48 is screwed onto an external thread 47 of this actuating rod 10, which sleeve is displaceably mounted in the housing 2 in the direction of the actuating rod 10 and which is surrounded in the interior of the housing 2 by a helical spring 49 which, on the one hand, is supported on the housing 2 via supporting disks 50, 51 and on the other hand is supported on the pivot lever 45.
- This coil spring 49 holds the pivot lever 45 in a front rest position, it can be pivoted against the action of this coil spring 49 into an open position which is limited by the pivot lever 45 abutting the housing 2. In the rest position, the pivot lever 45 can be fixed by a pivotable bolt 52 which is mounted on the web 5 between the two handles 3 and 4.
- the sleeve 48 also surrounds the actuating rod 10 from the housing 2 and widens like a bowl in this area.
- a threaded plug 54 is screwed into this cup-like extension 53, the screw-in depth of which can be fixed by a lock nut 55 screwed onto the threaded plug 54.
- the cup-shaped extension 53 and the threaded plug 54 surround an interior space 56, into which the end of the actuating rod 10 projects. Are on this end - 14 -
- the sleeve 48 forms with its end face 59 facing the pivoting lever 45 a stop against which the pivoting lever 45 rests when it is pivoted into the open position. He takes the sleeve 48 with him and moves it out of the housing 2, which at the same time takes the actuating rod 10 screwed into it and thus lifts the valve body 9 from the valve seat 8.
- the sleeve 48 can be rotated on the external thread 47 of the actuating rod 10, so that the position of the sleeve 48 can be changed relative to the actuating rod 10.
- the opening cross section of the closing valve 13 at a certain position of the pivot lever 45 can be varied.
- the outer circumference 60 of the extension 43 is preferably knurled or corrugated.
- the displacement of the sleeve 48 relative to the actuating rod 10 is limited in both directions, namely in one direction by the end face 61 of the actuating rod 10 striking the threaded plug 54 and in the other direction by the nut 58 striking the bottom of the cup-shaped extension 53
- These stops can be done by screwing the nut 58 and screwing the threaded plug 54 in their - 15 -
- a rod-shaped plunger 62 is displaceably mounted in the housing 2 in the extension of the blind hole 34, which rod is connected to the pivot lever 45 by a lateral driver 63 and is displaced in the longitudinal direction when the pivot lever 45 is pivoted, in the opposite direction to the displacement direction Actuating rod 10.
- the plunger 62 carries a hat-shaped nut 64 which is screwed onto an external thread of the plunger 62, not shown in the drawing, and which is fixed there by means of a lock nut 65.
- the nut 64 can be screwed onto the plunger 62 at different depths, so that an end driving surface 66 of the nut 64 can be set differently in its position along the plunger 62.
- a further plunger 68 is mounted so as to be longitudinally displaceable, one end 69 of the driving surface 66 and the other end 70 of which lies opposite the end of the actuating rod 43 of the closing valve 39.
- This plunger 68 serves to transmit the movement of the plunger 62 to the actuating rod 43.
- the driver surface 66 is positioned so that a space remains between it and the plunger 68 when the pivot lever 45 is in the rest position ( Figure 2).
- the content of the inflowing water can be adjusted by means of the rotary handle 31, through which the closing body 28 is inserted more or less deeply into the conical bore 27, the amount of inflowing compressed air can be adjusted by rotating the sleeve 48 on the external thread 47, and the The quantity of the abrasive particles sucked in can be adjusted by the sleeve 21, which closes the false air openings 22 or opens them more or less.
- the guide block 67 with the plunger 68 is namely displaceably mounted transversely to the longitudinal direction of the plunger 68 on the housing 2 and can be fixed in the respective end positions of the displacement.
- the displacement is carried out by lateral pins 71 on opposite end faces of the guide block 67, which protrude laterally from the housing 2 ( Figure 5).
- a ball 73 loaded by a coil spring 72 is mounted in the blind block 74 in the guide block 67 and is pressed by the coil spring 72 against a transverse wall 75 of the housing 2 on the underside of the guide block 67.
- the plunger 68 is aligned in the manner described with the plunger 62 on the one hand and the actuating rod 43 on the other hand, and can thus transmit the movement of the plunger 62 to the actuating rod 43 in the manner described.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19804233A DE19804233A1 (de) | 1998-02-04 | 1998-02-04 | Strahlmittel-Injektorpistole |
| DE19804233 | 1998-02-04 | ||
| PCT/EP1999/000396 WO1999039874A1 (de) | 1998-02-04 | 1999-01-21 | Strahlmittel-injektorpistole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1053077A1 true EP1053077A1 (de) | 2000-11-22 |
| EP1053077B1 EP1053077B1 (de) | 2002-12-04 |
Family
ID=7856530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99907398A Expired - Lifetime EP1053077B1 (de) | 1998-02-04 | 1999-01-21 | Strahlmittel-injektorpistole |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1053077B1 (de) |
| DE (2) | DE19804233A1 (de) |
| DK (1) | DK1053077T3 (de) |
| WO (1) | WO1999039874A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20004788U1 (de) | 2000-03-15 | 2000-06-21 | Schmidt Sandstrahltechnik GmbH, 91747 Westheim | Handhebel |
| GB0100756D0 (en) | 2001-01-11 | 2001-02-21 | Powderject Res Ltd | Needleless syringe |
| DE60313981T2 (de) * | 2002-07-23 | 2008-01-24 | Grechishkin, Oleg Ivanovich | Schleuderstrahlvorrichtung |
| GB0708758D0 (en) | 2007-05-04 | 2007-06-13 | Powderject Res Ltd | Particle cassettes and process thereof |
| CN103008134B (zh) * | 2012-03-21 | 2015-04-01 | 北京恩萨工程技术有限公司 | 一种喷枪及利用该喷枪实现将半固态介质分散输送方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2200587A (en) * | 1937-02-25 | 1940-05-14 | Hydroblast Corp | Method and apparatus for sand blasting |
| US3828478A (en) * | 1973-06-25 | 1974-08-13 | E Bemis | Fluid-jet-abrasive device and system |
| US4057940A (en) * | 1976-12-02 | 1977-11-15 | Otto Wemmer | Control for sand blasting nozzle |
| EP0059173A3 (de) * | 1981-02-19 | 1982-10-13 | C.I.S.A S.r.l. | Schleuderstrahlmaschine zum Oberflächenreinigen von allen Arten von Gegenständen |
| US5099619A (en) * | 1989-08-07 | 1992-03-31 | Rose Leo J | Pneumatic particulate blaster |
| DE4225590C2 (de) * | 1992-08-03 | 1995-04-27 | Johann Szuecs | Vorrichtung für die Behandlung von empfindlichen Oberflächen, insbesondere von Skulpturen |
-
1998
- 1998-02-04 DE DE19804233A patent/DE19804233A1/de not_active Withdrawn
-
1999
- 1999-01-21 WO PCT/EP1999/000396 patent/WO1999039874A1/de not_active Ceased
- 1999-01-21 EP EP99907398A patent/EP1053077B1/de not_active Expired - Lifetime
- 1999-01-21 DE DE59903647T patent/DE59903647D1/de not_active Expired - Lifetime
- 1999-01-21 DK DK99907398T patent/DK1053077T3/da active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9939874A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999039874A1 (de) | 1999-08-12 |
| EP1053077B1 (de) | 2002-12-04 |
| DK1053077T3 (da) | 2003-01-06 |
| DE59903647D1 (de) | 2003-01-16 |
| DE19804233A1 (de) | 1999-08-12 |
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