DE3617035A1 - Mechanical dead man's switch for sandblasting,with additional pneumatic-mechanically controlled safety device - Google Patents
Mechanical dead man's switch for sandblasting,with additional pneumatic-mechanically controlled safety deviceInfo
- Publication number
- DE3617035A1 DE3617035A1 DE19863617035 DE3617035A DE3617035A1 DE 3617035 A1 DE3617035 A1 DE 3617035A1 DE 19863617035 DE19863617035 DE 19863617035 DE 3617035 A DE3617035 A DE 3617035A DE 3617035 A1 DE3617035 A1 DE 3617035A1
- Authority
- DE
- Germany
- Prior art keywords
- blasting
- sandblasting
- switch
- lever
- safety device
- 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- Withdrawn
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
-
- 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
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung, welche es erlaubt, im Ernstfall den Austritt von Hochgeschwin digkeitspartikeln aus einer Strahlpistole innerhalb von 0,5 Sekunden zu unterbinden.The invention relates to a method and a device, which allows the exit of high speed in an emergency particles from a blasting gun within 0.5 Prevent seconds.
Alle bisher bekannten sogenannten Totmannschalter oder Totmann schaltersysteme schalten entweder elektrisch, pneumatisch oder hydraulisch das Gesamtsystem ab und lassen dann die Gesamtluftmenge des Druckkessels und/oder des Schlauches (bis zu 200 Meter und mehr) über die Strahldüse entweichen. Somit kann keines dieser Systeme die vom Gesetzgeber seit dem 1. 1. 1986 geforderten Zeiten von 3 Sekunden Nachstrahl zeit einhalten. Die Nachstrahlzeiten vorhandener Systeme belaufen sich zwischen 15 und 80 Sekunden.All previously known dead man switches or dead man switch systems switch either electrically or pneumatically or hydraulically the entire system and then let the Total air volume of the pressure vessel and / or the hose (up to 200 meters and more) escape through the jet nozzle. Thus, none of these systems can be used by lawmakers the 1st January 1986 times of 3 seconds after beam to be in time. The after-radiation times of existing systems are between 15 and 80 seconds.
Lediglich ein Hersteller löst dieses Problem durch die Zer störung des Strahlschlauches (Fallbeil) und beschwört da durch ebenso hohe Gefahren herauf.Only one manufacturer solves this problem with the Zer disruption of the blasting hose (guillotine) and conjures up there through equally high dangers.
Aufgabe der Erfindung ist es, das Verfahren bzw. die Vor richtung so zu entwickeln, daß die vom Gesetzgeber geforder ten Nachstrahlzeiten nach Loslassen des Totmannschalters auf weit unter 3 Sekunden, zerstörungsfrei, zu drücken. Dieses ist nach vielen Pilotprojekten gelungen. Die Aus schaltzeit liegt weit unterhalb einer Sekunde.The object of the invention is the method or the front to develop the direction so that the required by the legislator After-radiation times after releasing the dead man's switch to press well below 3 seconds, non-destructively. This has been achieved after many pilot projects. The out switching time is well below one second.
Nach Loslassen des Spannhebels (7) wird durch die Zugfeder (5) die Verschlußklappe (2) mit großer Kraft innerhalb von 0,5 Sekunden geschlossen. Die Kräfte werden durch den He belarm (2 a) von der gummierten Stahlplatte (3) und dem mittig angebrachten Stahllager (6) aufgenommen, so daß kein Strahl gut mehr aus der Strahldüse (17) austreten kann.After releasing the tensioning lever ( 7 ), the closing flap ( 2 ) is closed with great force within 0.5 seconds by the tension spring ( 5 ). The forces are absorbed by the arm ( 2 a) from the rubberized steel plate ( 3 ) and the steel bearing ( 6 ) attached in the center, so that no more jets can emerge from the jet nozzle ( 17 ).
Der Bügel (11) wurde so optimiert, daß dieser in jeder Stell ung leicht im Zuglager (8) und im Drucklager (9) abgerollt werden kann, damit der Sandstrahler den Gegendruck des He bels kaum noch spürt.The bracket ( 11 ) has been optimized so that it can be rolled off easily in the tension bearing ( 8 ) and in the thrust bearing ( 9 ) in every position, so that the sandblaster hardly feels the back pressure of the lever.
In der Schutzabdeckung (16) am Ende des Hebels (7) ist ein Permanentmagnet (15) eingelassen, welcher Bruchteile von Sekunden nach Loslassen des Hebels (7) einen in Gummi vul kanisierten, mit einem zusätzlichen inneren mechanischen Schutz versehenen Doppelreedschalter (12) über die Signal leitung (13) die Gesamtsteuerluft und somit auch die für die "Druckentlastungseinheit" (Zeichnung II) abschaltet.In the protective cover ( 16 ) at the end of the lever ( 7 ) a permanent magnet ( 15 ) is embedded, which fractions of a second after releasing the lever ( 7 ) a vulcanized in rubber, provided with additional internal mechanical protection double reed switch ( 12 ) the signal line ( 13 ) turns off the total control air and thus also for the "pressure relief unit" (drawing II).
Der Schaltmagnet ist durch einen Eisenstaubabweiser geschützt (Hut aus Gummi), damit sich hieran keine Eisen partikel festsetzen können.The switching magnet is through an iron dust deflector protected (hat made of rubber), so that no iron is attached to it can set particles.
Nach Abfallen der Steuerluft wird der Zugzylinder II (4) entspannt und der Umlenkblock II (1) durch eine starke Feder II (5) in die Nullstellung gebracht, so daß die Zu führung des Strahlgutes vom Druckkessel von II (2) über II (1 a) zur Strahldüse nicht mehr erfolgen kann. Beide unter Druck befindlichen Seiten, sowohl die des Druckkessels II (2) als auch die der Strahlpistole II (3) können sich spontan über die Umleitung II (1 b) in Richtung II (11) entspannen und das Gesamtsystem von Strahlpartikeln befreien, so daß bei einem erneuten Strahlbeginn das Gesamtsystem stets sau ber ist.After the control air has dropped, the pull cylinder II ( 4 ) is relaxed and the deflection block II ( 1 ) is brought into the zero position by a strong spring II ( 5 ), so that the blasting material is guided to from the pressure vessel by II ( 2 ) via II ( 1 a) can no longer take place to the jet nozzle. Both sides under pressure, both those of the pressure vessel II ( 2 ) and that of the blasting gun II ( 3 ) can relax spontaneously via the diversion II ( 1 b) in the direction II ( 11 ) and free the entire system from blasting particles, so that the entire system is always clean when the beam starts again.
Beide Ausgänge II (11) gehen zu dem Einfülltrichter ober halb des Druckkessels. Hierdurch wird erreicht, daß der Arbeitsplatz sauber bleibt, der Arbeitsschutz gewährleistet ist und Strahlgut eingespart wird.Both outputs II ( 11 ) go to the filling funnel above the pressure vessel. This ensures that the workplace remains clean, occupational safety is guaranteed and blasting material is saved.
Alle Rohrführungen sind in Strahlrichtung ca. 2 mm größer, um einen möglichst geringen Verschleiß zu haben. Es zeigtAll pipe guides are approx. 2 mm larger in the beam direction, to have as little wear as possible. It shows
Zeichnung I Funktionsdarstellung der mechanischen Schnell verschluß-Sandstrahlpistole,Drawing I functional representation of the mechanical quick breech sandblasting gun,
Zeichnung II Funktionsdarstellung der pneumatisch-mecha nischen Druckentlastungseinheit.Drawing II functional representation of the pneumatic-mecha African pressure relief unit.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863617035 DE3617035A1 (en) | 1986-05-21 | 1986-05-21 | Mechanical dead man's switch for sandblasting,with additional pneumatic-mechanically controlled safety device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863617035 DE3617035A1 (en) | 1986-05-21 | 1986-05-21 | Mechanical dead man's switch for sandblasting,with additional pneumatic-mechanically controlled safety device |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3617035A1 true DE3617035A1 (en) | 1987-11-26 |
Family
ID=6301272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19863617035 Withdrawn DE3617035A1 (en) | 1986-05-21 | 1986-05-21 | Mechanical dead man's switch for sandblasting,with additional pneumatic-mechanically controlled safety device |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3617035A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5209409A (en) * | 1991-12-04 | 1993-05-11 | Neiss Lynn R | Sandblast nozzle with wear resistant sealing device and lock-on mechanism |
WO2011067613A1 (en) * | 2009-12-04 | 2011-06-09 | Pinovo As | Abrasive blasting |
DE202013005237U1 (en) | 2013-06-03 | 2013-07-12 | Terex Cranes Germany Gmbh | Follow-up control for a blasting hose |
CN109195746A (en) * | 2016-04-11 | 2019-01-11 | 磨料工程私人有限公司 | Shot peening strengthening control valve |
-
1986
- 1986-05-21 DE DE19863617035 patent/DE3617035A1/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5209409A (en) * | 1991-12-04 | 1993-05-11 | Neiss Lynn R | Sandblast nozzle with wear resistant sealing device and lock-on mechanism |
WO2011067613A1 (en) * | 2009-12-04 | 2011-06-09 | Pinovo As | Abrasive blasting |
DE202013005237U1 (en) | 2013-06-03 | 2013-07-12 | Terex Cranes Germany Gmbh | Follow-up control for a blasting hose |
DE102014006472A1 (en) | 2013-06-03 | 2014-12-04 | Terex Cranes Germany Gmbh | Follow-up control for a blasting hose |
DE102014006472B4 (en) * | 2013-06-03 | 2017-10-26 | Terex Global Gmbh | Follow-up control for a blasting hose |
CN109195746A (en) * | 2016-04-11 | 2019-01-11 | 磨料工程私人有限公司 | Shot peening strengthening control valve |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |