DE7240741U - Spray devices such as spray guns and the like with a release shut-off - Google Patents

Description

W. Ernst Haas & Sohn, 654-9 Neuhoffnungrjhütte near Sinn / Dillkr,

Spray devices such as spray guns and the like with a release shut-off.

The invention relates to a spray device such as spray guns and the like with release switch-off of the pressure generator, e.g. for liquid jets, such as high-pressure cleaners and the like.

The safety regulations for liquid ejectors are based on certain operating conditions, e.g. overpressure of 25 bar, liquid outlet temperatures of more than 5o ° C, spray liquids which are harmful to health, Explosion or fire damage can cause spray devices that are hand-held to be designed in this way must be that when you let go of the actuating device another leakage of liquid automatically from the spray device or a further supply of liquid to the spray device is prevented or a The pressure generator is switched off. This is to ensure that accidents caused by the spray liquids be excluded if the spray gun is accidentally released.

For this reason, such spray devices are very often equipped with electrical control means by which the pressure suction device is switched off immediately when the

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Directing the spray gun on the handle the same external pressure no longer applies or decreases. However, such spray guns can be used, for example, in explosion-proof SHvHiian jri ffht TüläüciiT "P. *. N Türnina -5 nrm rs Λ V) !!" t: ^: flp ^ artixris? · Inri -h er · =

Guns can only be built with considerable effort, see B. completely gas-tight execution of the spray gun G-ehäuses, achieve.

It is the object of this invention to completely dispense with electrical means in the spray gun.

This task is to be achieved in that at least the control of the pressure generator with pneumatic means, e.g. via a membrane pressure switch built into the device part of the high-pressure cleaner, which via an air line with connected to a component that is preferably built into the handle of the spray gun; took place

This design enables the device part of the high-pressure cleaner with its electrical installation set up outside the explosion-proof area while the connection hoses and the spray gun are in position even if they do not have any electrical lines or control means, housed in the explosion-proof area are. The air hose rests against the media hose or is made into one part with it. Changes in pressure in the air hose, which could result, for example, from the heat transfer from the press hose, are prevented that the air line, but preferably the compressible part, is a normally open line that can be closed by pressure on it Has an opening to the free atmosphere.

In order to be able to make the choice of media on the spray gun itself with this spray gun as well, it is also proposed that the valves of the media container be switched on and off in the same way through further lines.

However, the designated koi'iprifcssibleh parts must be used Receive an additional locking device that keeps the media transport path open during the entire election period enables. This can be done, for example, by means of a simple locking mechanism.

Further advantages of the invention emerge from the following Description of the puncture, the drawings and the claims for protection. In the attached drawings show:

Figure 1:

I. figure 2: I. figure 3: I. figure 4; 1 figure 5:

A view of the spray gun according to the invention, which is connected to the high-pressure cleaner housing part via the media hose, the spray gun according to the invention in partial section, a view of the locking device for the media selection setting on the spray gun, an embodiment of the membrane pressure switch, a section through the media tube _{and the like} ch with inserted air t smart ji m.

The spray gun (1) is connected via the media suppression _u ch (2) to the high-pressure cleaning appliance part (3). The compressible part (5), which is connected via the air line (6) to the membrane pressure switch (7) built into the device part (3), is arranged in the GViffstück (4) of the spray gun (1). The air line (6) is attached to or media suppression _u ch (2) with this processed together to a part (Figure 5). The compressible part (5) ″ has an opening (8) at its front end. The air line is in direct connection with the free atmosphere via this opening (8). This is to prevent a pressure drop in the air line when this expands, e.g. as a result of the application of heat through the spray liquid conveyed in the media hose (2). The spring-loaded button (9) mounted on one side is located on the spray gun (l) in front of the handle (4) Guiding the spray gun with the hand is enclosed and pressed against the handle, a movable mandrel (lo) is provided in an advantageous embodiment of the invention, which when the button is pressed

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the opening (8) of the compressible part (5) closes and thus creates a self-contained column of air. By applying further pressure, the compressible one now becomes

(5) compressed. The displaced air column moves the Membrane (12) of the membrane pressure switch (7) »whereby the operated in the same built-in microswitch (13) and the pressure generator (14) via the corresponding control means (High pressure pump) switches on.

In a further embodiment of the invention takes place also the control of the valves for the media containers according to the same system. For this purpose are then, preferably Further compressible parts (16 and 17) are arranged in the rear part (15) of the spray gun, e.g. for preservatives and detergent. The compressible parts (16 and 17), however, have a locking device (11) which is kept open the media transport route for the desired election period is guaranteed.

The mode of operation of the device according to the invention is now as follows:

The high-pressure cleaner device part (3) is, for example, set up outside the explosion-proof area. Within the The only explosion-protected area is the spray gun (1), the media hose (2) and the air hoses

(6) available. The preselection of the washing process, e.g. using of detergent, takes place by pressing together and in this position engaging the for the detergent container responsible compressible part (16). Then, by pressing the button (9), the opening (8) of the compressible part (5) for the pressure generator initially closed. With further pressure it becomes compressible Partly compressed, creating a pressure in the line that affects the membrane pressure switch (7) and here the pressure generator (14) is switched on via the microswitch (13).

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This initiates the spraying process · By releasing the button of the spring-loaded button (9), the opening (8) of the compressible part (5) is released. This removes the pressure dismantled, the membrane (12) of the membrane pressure switch (7) returns to its original position, the microswitch

(13) is released and the pressure generator (high pressure pump)

(14) switched off. Preservatives can also be used in the same way as described here for detergents to adjust. It is also useful to lock the media selection device designed in such a way that only one spray medium can be set at a time.

Claims (7)

Protection claims ^ 1.) Spray device., Such as spray guns and the like Connected via a connecting line to the device part of a liquid jet and with a release switch-off are equipped for the pressure generator arranged in the device part and for which all control processes are transferred from the spray device to the device part with pneumatic means, characterized by means of a membrane pressure switch built into the device part, each via an air line with a compressible part are connected in the spray device. 2.) Spray device according to claim 1, characterized in that the air line, but preferably the compressible parts, each have an opening to the free atmosphere. 3.) Spray device according to claims 1 and 2 thereby characterized, dasa the compressible part (5) in the Handle of the spray device is arranged and via an air line (6) with the membrane pressure switch (7) is connected to the pressure generator (14). 4.) Spray device according to claim 3, characterized in that that a pin (lo) is arranged on the button (9) of the same, which opens the opening when the button is pressed (8) of the compressible part (5) closes. 5.) Spray device according to claims 1 and 2 thereby characterized in that further membrane pressure switches are assigned to the valves for the media container of the liquid ejector, which are also via separate Air lines are connected to corresponding compressible parts in the housing of the spray device. β.) Spreading device according to claim 5, characterized in that the respective opening associated with the compressible parts (16) (17) connected to the valves for the media container is each eir.e closing device (15), each with an additional; Locking device (11), for example a detent, is provided. 7.) Spray device according to claim 6, characterized in that the Medienwa ^ lochalter have a lock that each only adjusts a medium
allows.