DE529609C

DE529609C - Spray gun for applying liquid

Info

Publication number: DE529609C
Application number: DEL72575D
Authority: DE
Original assignee: RENEE MARIE-LOUISE LEMOINE GEB TROUILLET
Current assignee: RENEE MARIE-LOUISE LEMOINE GEB TROUILLET
Priority date: 1927-08-04
Filing date: 1928-08-02
Publication date: 1931-07-15

Description

Die Erfindung betrifft eine Spritzpistole zum Auftragen von Flüssigkeit, die unter gleichzeitiger Anwendung von Saug- und Druckförderung aus der Pistole ausgestoßen wird. Derartige Spritzpistolen werden zum Auftragen von Farben und Lacken sowie von Mitteln zur Keimbefreiung und Schädlingsvertilgung benutzt. In allen diesen Fällen ist es von Wichtigkeit, daß man den Spritzvorgang kurzzeitig unterbrechen und wieder einschalten kann. Für diesen Zweck ist bereits vorgeschlagen worden, seitlich zur Treibmittelleitung einen durch eine Klappe verschließbaren Abfluß vorzusehen, aus dem das Treibmittel nach Öffnung der Klappe von Hand im Bedarfsfalle ins Freie entweichen kann. Gegenstand der Erfindung ist eine Spritzpistole dieser Bauart, bei der in. dem Leitungsstrang des Treibmittels hinter dem Abfluß ein federbelastetes Absperrventil liegt, das' sich selbsttätig bei vermindertem Druck des Treibmittels schließt u*rid dadurch die Unterbrechung des Spritzvorganges sicherstellt. Der Einbau eines solchen Ventils ist besonders zweckmäßig in den Fällen, in denen das Treibmittel von der Bombe bis zur Zerstäubungsstelle geradlinig geführt ist und deshalb keine Durchflußwiderstände aufweist.
In den Zeichnungen ist der Gegenstand der Erfindung in einem Ausführungsbeispiel dargestellt.The invention relates to a spray gun for applying liquid which is ejected from the gun with simultaneous use of suction and pressure delivery. Such spray guns are used to apply paints and varnishes as well as agents for germ removal and pest control. In all of these cases it is important that the spraying process can be briefly interrupted and then switched on again. For this purpose it has already been proposed to provide a drain that can be closed by a flap on the side of the propellant line, from which the propellant can escape into the open if necessary after opening the flap by hand. The subject of the invention is a spray gun of this type in which there is a spring-loaded shut-off valve in the line of the propellant behind the drain, which closes automatically when the propellant pressure is reduced and thereby ensures that the spraying process is interrupted. The installation of such a valve is particularly useful in those cases in which the propellant is guided in a straight line from the bomb to the atomization point and therefore has no flow resistance.
In the drawings, the subject matter of the invention is shown in an exemplary embodiment.

Abb. ι zeigt einen Längsschnitt durch den eigentlichen Zerstäuber;Fig. Ι shows a longitudinal section through the actual atomizer;

Abb. 2 zeigt eine Vorderansicht auf die Düse;Fig. 2 shows a front view of the nozzle;

Abb. 3 zeigt eine Draufsicht auf den Zerstäuber; Figure 3 shows a top view of the nebulizer;

Abb. 4 zeigt in verkleinertem Maßstabe die gesamte Zerstäubungseinrichtung nebst Gasbombe und Flüssigkeitsbehälter.Fig. 4 shows, on a reduced scale, the entire atomization device together with the gas bomb and liquid container.

Der eigentliche Zerstäuber besitzt einen rohrförmigen Schaft 3, der mittels einer Muffe 4 an die Bombe r angeschlossen ist. Der Schaft wird von einem Längskanal 6 für den Durchfluß des Treibmittels durchzogen, der in eine Kammer 7 einmündet. Seitlich zu dieser ist ein Abfluß für das Treibmittel vorgesehen, und zwar verläuft er durch einen Nippel 8, der in die Schaftwandung eingesetzt ist. Die außen liegende Mündung des Nippels ist normalerweise durch eine Dichtung 9 geschlossen, die in eine Fassung 10 eingebettet ist. Die Fassung wird von einem Handgriff 11 gehalten, der um einen Stift 12 drehbar gelagert ist. D er Stift wird von einer in den Schaft -eingeschraubten Zwinge 13 getragen.The actual atomizer has a tubular shaft 3, which by means of a Sleeve 4 is attached to the bomb r. The shaft is supported by a longitudinal channel 6 traversed for the flow of the propellant, which opens into a chamber 7. Laterally to this a drain for the propellant is provided, and that it runs through a nipple 8 which is inserted into the shaft wall. The outer mouth of the nipple is normally closed by a seal 9, which is in a socket 10 is embedded. The socket is held by a handle 11, which is around a Pin 12 is rotatably mounted. T he pen will carried by a ferrule 13 screwed into the shaft.

Der Kanal 6 mündet an seinem vorderen "Ende in eine zweite Kammer 14, die in die Stirnseite des Schaftes 3 eingelassen ist. Die Mündungsstelle ist normalerweise durch ein von einer Feder 16 belastetes Ventil 1S ge-The channel 6 opens at its front "end in a second chamber 14, which is in the Front side of the shaft 3 is embedded. The muzzle is usually through a valve 1S loaded by a spring 16

Claims

closed. The lower valve spindle 17 is interspersed with. Game a locking piece 18, which serves to close the comb side opposite the opening point. The shaft 3 is narrowed at its end at 3 ¹ and has a thread onto which an extension shaft 19 is screwed. A sealing ring 20 lies between the two shaft bodies 3 and 19. The end of the shaft 19 adjacent to the shaft 3 has a chamber 21 into which the propellant can flow after it has flowed around the valve spindle 17 and the closure piece 18. A sloping channel 22 leads from the chamber 21 into a further pipe 23 which is provided with an internal thread. The liquid container 5, which can be used in a commercially available form after the plug has been removed, is inserted into this tube.

In the middle of the tube 23, a second tube 24 of considerably smaller diameter is provided, which is screwed radially into the shaft 19 at one end and continues at its other end into a dip tube 25, from which the liquid from its container to the atomization point got. The further supply of the liquid to this point takes place through a line 26 and through a chamber 27 extending through the shaft 19 in the longitudinal direction. In this chamber there is a hollow spindle 28 which is provided for conveying the propellant from the chamber 21 to the atomization point. The connection of the spindle 28 to the shaft 19 takes place by means of a thread 28 ¹ which lies between the chambers 21 and 27. The front end of the spindle 28 is surrounded by a cap 29. This cap is also screwed to the shaft 19 via a stuffing box 30. The cap 29 has an operating edge "2 9 ^1" and in its center a bore 31 which connects the interior of the hollow spindle 28 with the outside air.

The atomization point is located between this bore and the conical one End of spindle 28.

Fig. 4 shows the assembly of the atomizer with the associated parts.

As can be seen, the shaft 3 is connected via the sleeve 4 to a bomb 1, which is provided with an operating handle 2. The liquid container 5 is on the opposite side End of the atomizer body and is penetrated by the immersion tube 25 in its longitudinal direction. The bomb that The liquid container and the actual spindle thus form a structural unit ' and therefore can be transported very conveniently and become part of one of one Form motor vehicle carried tool kit.

The facility works as follows:

The handle 2 of a bomb is moved in the direction of the opening and then the discharge pressure of the expanded gas adjusted so that the atomized jet at 3.1 the desired Maintains strength. The handle π closes the opening 8 so that the Propellant cannot escape laterally. Once the desired pressure has been set The outflow rate can be controlled arbitrarily by rotating the cap 29.

As long as the handle 11 is in the final position is located, the propellant coming from the channel 6 pushes the valve 1S back and enters the chamber unhindered 21. From there it partly takes its way through the inclined channel 22 and practices on the liquid contained in the container 5 from a pressure, so that this in the dip tube 25 rises. The other part of the propellant continues its way in the gun axis continues through the bore of the hollow spindle 28 and causes the atomization of the Immersion tube. 2 5> and the channel 27 coming liquid.

As soon as a sufficient amount of liquid has been applied to a point, the operator lets go of the handle 11, which is opens. The propellant finds a convenient drainage through the nipple 8 and flows directly to the outside without being able to push the valve 15 back into its open position. Of the The atomization process is briefly interrupted> and only then initiated again, when the handle 11 is the drain in the nipple 8 has locked again.

IΆ T E NT ANSI 'RU CJI!

Spray gun for applying liquid with simultaneous suction 'and Pressure conveying with a side to the propellant line and arranged through a flap closable drain, characterized in that in the conduit the propellant behind the drain is a leather-loaded shut-off valve (15), which closes automatically at reduced pressure of the propellant and thereby ensures the interruption of the injection process.

1 sheet of drawings