EP1743714B1 - Device for spraying liquids on objects such as machine parts or the like - Google Patents

Abstract

Equipment has a valve (9), which is arranged in the line (8,12,13) which is leading from the pump (4) to the nozzle pipe or perforated pipe (6,7). The valve is closed by opening the cover (2) or the front door of the washing equipment and is opened by closing cover or front door and then flow is released.

Description

The invention relates to a device for spraying liquids onto objects, for example a washing device for cleaning articles such as machine parts or the like, with a housing which is provided with an upper pivotable cover or with a frontal door, a basket for receiving the objects to be cleaned which can rest on a turntable which rotates during the injection process with the basket, and further with a pump which delivers liquid and at least one nozzle tube or perforated tube, which directs exiting liquid jets on the wash basket. The liquid, e.g. Water, which may be provided with a detergent additive, or combustible media such as solvent-based cleaner is preferably sucked from a located in the lower part of the housing liquid collection tank by the pump and at least one nozzle or perforated tube above the receiving basket and at least one nozzle or perforated tube below supplied to the receiving basket, said tubes can also rotate up, down and laterally around the basket, so that impinge on the objects from above and from below and optionally laterally jets of liquid. The device can z. B. also for spraying of preserving liquids or colors on objects.

The invention will be described below as a washing device. If the cleaned items are to be removed from the machine or if additional items are to be placed in the basket for cleaning, the pump must be turned off before the case is opened, otherwise liquid may spurt out of the opened case. Both Previously known devices of the type under consideration must be maintained for a while with the opening of the housing after the electric pump is switched off, since the liquid in the pipe system is still under pressure, so that even after switching off the pump still liquid from the nozzle pipes or ; Pipe pipes emerges.

US-A-5482064 discloses a cleaning apparatus according to the term of claim 1, wherein a ball valve is housed in a pump which selectively supplies a cleaning fluid to a nozzle tube or a cleaning gun or a brush. Connected to the lid of the device is a linkage that switches the ball valve via a control arm when the lid is opened or closed.

In the cleaning device of GB-A-2301299 is provided between the pump and the nozzle pipes a shut-off device, which is selectively operable. One. Sensor is used to detect the presence of solvent vapor when solvent leakage occurs near the tank. In this case, the pumping of the solvent from the tank to the rest of the system is automatically interrupted. The shut-off device is actuated by a compressed air system.

In the cleaning system of US-A-5273060 the flow of solvent to the nozzles is interrupted by shutting off the pump and shutting a valve in the supply line. Details of the operation of the valve can not be found in the document.

The present invention has for its object to improve a device of the type under consideration so that its housing can be opened during a liquid-spraying operation or immediately after its completion without disadvantage.

This object is achieved by the features of claim 1. .

Advantageous embodiments of the invention are characterized in the subclaims.

The invention provides that in the leading from the pump to the weinigstens a nozzle pipe or perforated pipe line, a valve is arranged, which is open with the lid closed and releases the flow and which is closed by the opening of the lid. If the device, as is preferred, has a plurality of nozzle tubes or perforated tubes, this valve is located in the common supply line to the nozzle or perforated tubes.

The valve has an actuating tappet which is mechanically operable to open the valve and which is connected to at least one non-return valve and / or at least one check nub, which is / are spaced from its valve seat (s) in the valve open state; closed state of the valve to its valve seat / valve seats. is pressed / are. Inside the lid or on the front door, an actuator is mounted, which is suitable when. Close the lid or the front door on the actuating plunger apply and move it to the open position, and release the actuating plunger when opening the lid or the front door, so that it is offset by the pressure of the liquid in the closed position.

This closing process is done with great speed and reliability.

The valve is preferably biased by spring force into the closed position, wherein the flowing medium and preferably provided coil spring abruptly when opening the lid or a front door of the housing

Block flow through the pipe leading to the nozzle pipes or perforated pipes.

This ensures that the device can be opened immediately after switching off the pump, without even more liquid escapes from the nozzle pipes or perforated pipes. The pump is preferably also switched off automatically by opening the lid or a front door of the device.

In the invention it is provided that inside the lid (or possibly the front door of the housing), an actuator is attached, which impinges upon closing the lid on the actuating plunger of the valve and pushes it into the open position, i. in the case of an upper lid depressed.

The actuator may be a rod which is hinged to the cover and held in a preferred vertical arrangement by a guide means in alignment with the actuating tappet. The guide device can engage around the rod in an annular manner and, in the case of an upper cover, be fastened to a side wall of the housing. If the device has a hinged front door, the actuator is preferably arranged horizontally.

In another embodiment, a locking handle for the lid or the door during its rotational movement into the closed position presses the actuating plunger in the open position of the valve.

In further detail it is proposed that the actuating plunger of the valve merges into a smaller diameter guide plunger and that a non-return valve rests against the annular shoulder formed thereby, which has a circular ring shape and surrounds the guide plunger and is secured thereto. In addition, it can be provided that a check ball is attached to the free end of the guide plunger. There are also several non-return valves and / or a plurality of check balls are provided which cooperate with respective valve seats.

In the device according to the invention is thus reliably prevented that after opening the lid still liquid exits the nozzle pipes or perforated pipes. As a result, the safety of the device is significantly increased because the fluid is sometimes hot and could burn an operator, or be flammable and aggressive.

Figur 1

eine rein schematische Darstellung eines Geräts mit geschlossenem Deckel;

Figur 2

das Gerät gemäß Figur 1 mit geöffnetem Deckel;

Figur 3

eine vergrößerte Darstellung des Ventils bei geschlossenem Deckel;

Figur 4

das Ventil gemäß Figur 3 bei geöffnetem Deckel;

Figur 5

ein Gerät mit einem drehbaren Verriegelungsgriff für den Deckel.

Further details of the invention will become apparent from the following description of a preferred embodiment and from the drawings. Showing:

FIG. 1

a purely schematic representation of a device with a closed lid;

FIG. 2

the device according to FIG. 1 with lid open;

FIG. 3

an enlarged view of the valve with the lid closed;

FIG. 4

the valve according to FIG. 3 with the lid open;

FIG. 5

a device with a rotatable locking handle for the lid.

The Figures 1 and 2 show in a purely schematic manner essential parts of a device eg for cleaning machine parts or the like.

The housing 1 contains in the illustrated embodiment, an upper lid 2, which is hinged around hinges 3. In the bottom region of the housing 1, a pump 4 is housed, the liquid sucks from a housing portion 5, in which the liquid is collected again after it has leaked from the nozzle tubes or perforated tubes 6, 7. From the pump 4 first performs a line 8 in the form of a pipe to a valve 9 upwards, from where two pipe or Branch hose branch 10, 11 laterally. These pipe or hose nozzles 10, 11 1 are via lines 12, 13 with the upper nozzle tube or perforated tube 6, from the liquid jets down to exit, and connected to a lower nozzle tube or perforated tube 7, which from below liquid jets against one between the Nozzle tubes arranged, not shown basket directed, in which the objects to be cleaned are inserted.

The lid 2 has an inverted trough or hood shape and receives the upper nozzle tube or perforated tube in it, like the FIGS. 1 and 2 demonstrate. In the lower region of the lid 2, an actuating rod 14 for the valve 9 is articulated, preferably on a side wall. The actuating rod 14 extends through an annular guide member 15 which guides the actuating rod 14 so that its head end when closing the lid on an actuating plunger 16 of the valve 9 and this pushes against the force of a spring 17 down, whereby the valve 9 is opened ,

When the lid 2 of the device is opened, as FIG. 2 shows, the actuating rod 14, the actuating plunger 16 free, which is pressed as a result by the flowing medium, supported by the force of the spring 17 abruptly upwards in the closed position of the valve.

With reference to the Figures 3 and 4 contains the valve 9 except the parts already described a check valve 18 which bears against an annular shoulder 19, at which the actuating rod 16 narrows cross-sectionally to a guide tappet 20. At the free end of the guide tappet 20, a check ball 21 is attached.

The coil spring 17 is supported on the underside of the check valve 18 and on a tappet guide 22 for the guide tappet 20. The actuating plunger 16 extends through a guide bush 23 of the valve housing. At 24, a seal for the guide tappet is designated. The seal for the non-return valve 18 is indicated by the reference numeral 25.

FIG. 3 shows the state in which the actuating plunger 16 is pressed down by the actuating rod 14 against the force of the coil spring 17, so that the flow from the pump 4 through the lower valve opening 26 and the upper valve opening 27 to the lines 12 and 13 for the upper nozzle tube 6 and the lower nozzle tube 7 is released.

When the lid 2 of the device is opened (or a front door is opened), the actuating plunger 16 is released, so that the fluid and the spring 17, the check valve 18 and the check ball 21 abruptly press against their valve seats, whereby the liquid paths closed by the valve are.

The embodiment of the FIG. 5 contains a rotatable locking handle 28 for the lid 2. In the closed position of the locking handle 28 presses this with an actuating portion 29, the actuating plunger 16 of the valve 9 against spring force down.

Claims (5)

1. A device which is suitable for spraying liquids on to objects, including a housing, a basket for receiving the objects and including a pump, which is connected via a conduit (8, 12, 13) to at least one nozzle pipe or apertured pipe, in which a valve (9) is disposed, which is closed when the cover or front door of the washing machine is open and is opened when the cover or front door is closed and permits flow, characterised in that the valve (9) includes an actuating rod (16), which is mechanically actuable in order to open the valve (9), and which is connected to at least one non-return flap (18) and/or at least one non-return ball (21), which, in the open state of the valve, is/are spaced from its valve seat/their valve seats, and, in the closed state of the valve, is/are pressed against its valve seat/their valve seats, and that attached to the interior of the cover (2) or of the front door there is an actuating element (14), which is suitable, on closing of the cover (2) or of the front door, to impinge against the actuating rod (16) and to press it down or forwards and, on opening or the cover (2) or of the front door, to release the actuating rod (16) so that it is moved abruptly into the closed position by the pressure of the liquid.
2. A device as claimed in claim 1, characterised in that the actuating rod (16) is biased into the closed position by a spring.
3. A device as claimed in claim 1 or 2, characterised in that the actuating element is a rod (14), which is pivotally mounted on the cover (2) or the front door and is held in alignment with the actuating rod (16) by a guide device (15).
4. A device as claimed in claim 1 or 2, characterised in that a locking handle (28) for the cover is suitable, on rotary movement of the locking handle (28) for closing the cover (2) with an actuating section (29), for impinging against the actuating rod (16) and opening the valve (9).
5. A device as claimed in one of claims 1 to 4, characterised in that the actuating rod (16) merges into a guide rod (20), that engaging the annular shoulder (19) thus formed is the at least one non-return flap (18), which surrounds the guide rod (20) in a circular annular shape and is fastened to it and that fastened to the free end of the guide rod (20) there is a non-return ball (21).

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