EP1516674A2 - High pressure gun with resetting of the regulating valve - Google Patents

Abstract

High pressure gun (1) with an automatic recoil has a throttle valve function. Preferred Features: A spring-loaded lever (3) is assigned to the throttle valve (17). The lever holds the valve in its open position in its resting position. The lever is arranged above an operating lever (2). The lever pivots on one side. The throttle valve and an admission valve (5) are arranged parallel to each other in a connecting piece of the gun.

Description

The invention relates to a high-pressure gun with automatic reset of Throttle valve function according to the preamble of patent claim 1.

HD guns are used to distribute the high-pressure jet to processing and Cleaning surfaces used. The high pressure jet is from a Generated high-pressure cleaner. In known HD pistols is a one-sided pivotally mounted actuating lever present, the spring loaded in his high position is maintained. Upon actuation of this lever is an associated Throttle valve is opened and the high pressure jet is from a feeding HD hose into the spray nozzle or the attached washing lance.

In such a HD pistol is for individual adjustment of the High pressure jet also known to have an additional throttle valve used. This throttle valve consists of a hand-operated adjusting nut or knurled nut with the same hand holding the operating lever HD pistol actuated, can be rotated accordingly. With the twist This operating wheel for controlling the additional throttle valve can so that the high pressure jet can be adjusted sensitively. Such a sensitive one Setting is used, for example, when at the Vehicle cleaning only a relatively low pressure flow on the tires should be routed while cleaning the wheel arch High-pressure flow with the highest pressure and highest volume can be specified should. The user operates the knurl wheel by hand, as desired. which operates the additional throttle valve.

In the arrangement of a thumbwheel, however, has been a disadvantage proved that it is difficult to operate and the knurl wheel no has automatic reset function. The function performed with the thumbwheel is also described as a Variopress function. Known pistols with this Variopress function are designed so that over the said wheel or the Knurled nut reduces the cross section of the water in the main liquid flow or can be increased.

However, the setting of the knurled nut remains constantly in operation after the operation this set function. This has the disadvantage that at different Cleaning tasks or when changing the cleaning staff, the cleaning performance due to the permanent throttling of the volume flow is not is noticed, which leads to a considerable expenditure of time.

The user who previously did not work with the high-pressure gun believes that there is a defect because only a small high-pressure jet is emitted. It is not clear to him that from another user that Hand-operated knurled wheel was set so that the throttle valve is almost in the closed position is.

The invention is therefore the object of a high-pressure gun with automatic reset of the so-called Variopress function.

To achieve the object, the invention is characterized in that that the throttle valve, which is assigned to the Variopress function, a associated spring-loaded trigger, which due to its spring load at Non-operation keeps the throttle valve in the open position.

This will be an automatic reset of the Variopress function guaranteed when the high-pressure gun is no longer used. Of the Trigger, which the variopress function associated throttle valve operated, is accordingly in the rest position always in its open position held so that when not actuated trigger lever always the full amount of High pressure medium is passed through the high pressure gun. These Quantity is then - as known - only by the operating lever itself affected. Upon actuation of the actuating lever, the high-pressure medium with full volume and full pressure via the washer gun or spray nozzle during which, when the operating lever is not operated, the Exhaust end of the high-pressure gun is closed.

Important in the invention is now that in addition to the operating lever now the previously mentioned further throttle valve is present and this throttle valve (to fulfill the Variopress function) no longer with a hand-operated one Adjusting screw or a thumbwheel is operated, but with a spring-loaded trigger.

This has the advantage that this spring-loaded trigger lever always in Open position is held, if he is not actuated, that thus at Decommissioning of the high pressure gun always the high pressure passage through the Pistol is kept free.

If the user now wants a throttling of the high-pressure flow, actuated he the trigger against the spring force of a built-in spring and it Accordingly, the associated throttle valve is activated and relocated at least partially the high pressure passage, so that a lower Amount of water is discharged at the outlet.

However, as soon as the user releases the trigger, the full amount is restored the high-pressure medium passed. This will prevent that from happening Removing the high-pressure gun or accidentally putting it out of service High-pressure passage through a hand-operated knurled wheel or a set screw is misplaced and this is not noticed when re-commissioning.

Another advantage of the invention is that with the use of a one-sided swivel mounted, spring loaded trigger now a very fast and dynamic adjustment of the high-pressure jet is possible. The trigger can be operated very quickly by hand, which also makes it possible to get a rapidly changing high-pressure jet to corresponding processing surfaces produce.

It is particularly advantageous if the trigger lever are arranged one above the other together with the actuating lever.
In this case, it is preferred if the fingers of one hand can actuate both the actuating lever and the trigger lever.

It is particularly advantageous if the trigger lever above the Operating lever is arranged. With the three fingers, for example, the right one Hand can therefore be the relatively large-scale operating lever for dispensing High-pressure medium are actuated and, for example, with the index finger of the same hand then the trigger is actuated, creating an additional Change the discharged high-pressure jet is given. It is about This is a particularly ergonomically simple and safe operation, the even with prolonged use the hand does not tire.

The invention is not limited to the particular embodiment of the Variopress function associated throttle valve limited. As an exemplary embodiment Thus, the present invention describes two different embodiments for the realization of such a throttle valve, which with a spring-loaded pivotable and designed as a one-sided lever trigger is working.

In the first embodiment, the trigger lever is pivotable on one side Lever pivotally mounted in the housing of the hand of the high-pressure gun and acts with an actuating rod on an associated throttle valve, which in the High pressure passage is more or less insertable.

In the other embodiment of the invention, it is provided that the Throttle valve, which is assigned to the Variopress function according to the invention and also the passage valve, which is associated with the actuating lever, are formed coaxially with each other and formed in the rotary coupling Connector are arranged on the outlet side of the high-pressure gun.

It is therefore not important in the present invention, at which point exactly the throttle valves for the operating lever and for the trigger are arranged. Therefore, the present invention describes two different ones Mounting options.

However, the possibilities of the invention are not exhausted because it is in the Invention essentially depends on having a finger-operated, spring loaded trigger at any time to change the high pressure flow can and the trigger lever in its non-actuated rest position spring-loaded the Throttle valve opens.

The subject invention of the present invention is not only evident the subject matter of the individual claims, but also from the Combination of the individual claims among themselves.

All information disclosed in the documents, including the summary and features, in particular the spatial illustrated in the drawings Training, are claimed as essential to the invention, as far as they individually or in combination with the prior art are new.

In the following, the invention is based on several execution paths illustrative drawings explained in more detail. Here are the drawings and its description further features essential to the invention and advantages of Invention forth.

Figur 1:

schematisiert eine erste Ausführungsform einer Hochdruckpistole;

Figur 2:

schematisiert eine zweite Ausführungsform einer Hochdruckpistole.

Show it:

FIG. 1:

schematizes a first embodiment of a high pressure gun;

FIG. 2:

schematically illustrates a second embodiment of a high-pressure gun.

The high pressure gun 1 of Figure 1 consists essentially of two Housing shells that are interconnected. Only schematized illustrated that in the housing of the high-pressure gun, an actuating lever. 2 pivotally mounted in a pivot axis 24, wherein with the actuation This actuating lever 2, a pull rod 4 is actuated, whose length is still is adjustable via an adjusting nut 27.

The pull rod 4 is fixedly connected to a valve body 9, at the rear side a lug 8 of increased diameter is arranged. At the back of this Approach 8 sets the one end of a spring 7, the other end in an associated bore 48 applies.

In this way, with the operation of the operating lever 2 in the direction of the fixed handle of the HD gun, the valve body 9 of the opposite valve seat 10 removed (as shown in Figure 1) and the High-pressure medium, which is supplied via an HD hose 14 from below is, can be supplied in the direction of arrow 11 a quick connector 13. At the Quick coupling 13 is then for example a spray nozzle or a Wash lance or the like arranged. The HD hose 14 is over a Connection sleeve 15 connected to the valve body 49, so that the High pressure medium in the direction of arrow 16 and a narrower channel 26 flows through and then into the valve space between the valve body 9 and the valve seat 10 initiated and redirected there.

Important according to the invention is now that in the grip region of the actuating lever. 2 a spring-loaded and unilaterally pivotally mounted trigger lever 3 is arranged is intended to fulfill the Variopress function.

In the position shown in solid lines of the trigger lever. 3 this closes almost completely the channel 26, because at the free pivoting End of the trigger lever 3 attaches an actuating rod 20 whose length is also adjustable via an associated adjusting nut 28. The Actuating rod 20 is fixed at its front with a throttle valve 17th connected, which sealed with an O-ring 18 in an associated Transverse bore is guided longitudinally displaceable. At the back of this Throttle valve 17, the actuating rod 20 is attached.

The actuating rod 20 is sealed via an O-ring 22 in a in Valve body 49 guided longitudinally bore, in which a spring 21 is arranged is. This is supported with one end to a neck of the actuating rod while the other end abuts the back of the bore. To this Way is ensured that the operating lever 3 in unactuated position always is pivoted to its position 3 'and thus the throttle valve 17 is disengaged comes with the channel 26.

Thus, the channel 26 is always full flows through the high pressure medium.

If, however, the trigger 3 in the figure 1 is drawn through lines shown position pivoted against the force of the spring 21, then the Throttle valve 17 at least partially retracted into the channel 26 and the High-pressure current is braked and reduced accordingly in the direction of arrow 16.

The valve associated with the actuating lever 2 is used as a pistol valve. 5 referred to, when actuated always the full high-pressure jet in the arrow direction 11 is supplied to the outlet 12, if not the trigger lever 3 is actuated.

It is also added that the throttle valve 17 with the O-ring 18 in the Bore 19 of the valve body 49 is guided sealed.

The trigger 3 is pivotally mounted on one side as a lever in the Swivel axis 23 pivotally mounted, wherein the pivot axis in the housing the HD gun 1 is arranged.

The pivot axis 23 could also be arranged in the actuating lever 2.

For ergonomic reasons, the trigger lever 3 in a receptacle 25 of the Operating lever 2 swiveled, so that the two levers 2, 3 with your fingers a hand can be operated and the trigger 3 preferably with the Forefinger of the left or right hand is pressed.

In the embodiment of Figure 2, the entire valve installation is composed of the pistol valve 5 and the throttle valve 17 in coaxial design trained and is here in the rotatable connected to the HD gun 1 Quick coupling 13 laid.

The entire structure with the throttle valve 17 and the gun valve 5 can Therefore, be rotated freely around the horizontal axis of rotation.

In the illustrated embodiment, the actuating lever 2 is at its lower End pivotally mounted in a pivot axis 24, while its upper, pivotable end has an actuating roller 31, located at the bottom a slope 32 applies, the part of a pivotally mounted reversing lever 29th is.

The reversing lever 29 is pivotally mounted in the pivot axis 30. Will the Operating lever 2 pulled towards the housing shell of the HD gun, then the actuating roller 31 rolls on the slope 32 and the Reversing lever 29 is pivoted in the direction of arrow 33 about its pivot axis 30. As a result, the valve piston 36 is taken to the rear, because of Lever 29, the valve piston 36 moves in the direction of arrow 35 to the rear.

This is effected by a projection 34, which at the free pivoting part of the Reversing lever 29 abuts.

The valve piston 36 of the gun lever 2 associated valve is coaxial slidable on the actuating rod 20 for the actuation of the trigger lever. 3 stored.

The front end of the valve piston 36 engages in a fixed in the quick coupling 13 arranged valve body 49 and is rotatably supported there and sealed displaceable.

In the drawn open position, the high-pressure medium on the Connection sleeve 15 fed in the direction of arrow 39 from below and passes through a ring channel 41 forward, is at a corresponding paragraph of the Valve piston 36 deflected outwardly and flows radially outward in a transverse channel 47 which in turn under 90 ° deflection into an axial directed annular channel 42 opens. About this annular channel then flows High pressure medium in the axial direction forward towards the Connection side, where, for example, a wash lance or a spray nozzle is arranged.

The front end of the valve piston 36 carries an O-ring, so that this part in an associated pressure relief sleeve 45 is slidably guided. Important is now that this operating lever 2 associated valve piston 36 coaxial with another throttle valve 17 cooperates, which the trigger 3 assigned. For this purpose, the trigger lever 3 carries back to his Rear of an adjusting nut 28 with the operating rod 20th interacts. The actuating rod 20 is in this case the displacement bearing for the aforementioned valve piston 36. This actuating rod 20 is at her front free end fixedly connected to a throttle sleeve 43, in whose Interior a spring 44 is arranged. This relies on the one hand on the Inside the throttle sleeve 43 and on the other hand on the pressure relief sleeve 45th

The spring 44 thus holds the throttle sleeve 43 in the open position, so that the Cross channel 47 is always kept free and the high pressure medium unhindered can flow through it.

If, however, the trigger lever 3 is actuated against the force of the spring 44, then the throttle sleeve 43 is moved backwards in the direction of arrow 35 and the Cross channel 47 at least partially closed. This way can with the operation of the trigger lever 3 of the high pressure jet interrupted or partially weakened.

From the connection sleeve 15 from the high pressure medium flows into a Flow chamber 39 in the valve body 49 and is in the arrow directions 37th diverted. The seal 38 seals with its rear end in the direction of a valve seat 40 on the valve piston 36th

The actuating rod 20 of the trigger lever 3 is through an O-ring 46th sealed against the atmosphere through the throttle sleeve 43 passed.

Important in the invention is that now as an adjustment for the sensitive Setting the high pressure current is no longer the known and only with the Thumb-operated thumbwheel or thumbscrew is used, but a finger-operated trigger 3, which is a sensitive Setting and changing the high-pressure current makes possible, as long as the Actuator 2 is pressed.

drawing Legend

1

HD gun

2

actuating lever

3

sear

4

pull bar

5

pistol valve

7

feather

8th

approach

9

valve body

10

valve seat

11

arrow

12

outlet

13

quick coupling

14

HP hose

15

coupling bush

16

arrow

17

throttle valve

18

O-ring

19

drilling

20

actuating rod

21

feather

22

O-ring

23

swivel axis

24

swivel axis

25

admission

26

hand

27

adjusting

28

adjusting

29

Umlenkhebel

30

swivel axis

31

actuating roll

32

slope

33

arrow

34

attack

35

arrow

36

plunger

37

arrow

38

poetry

39

flow chamber

40

valve seat

41

annular channel

42

annular channel

43

throttle sleeve

44

feather

45

Pressure relief sleeve

46

O-ring

47

Querkanal

48

drilling

49

valve body

Claims (10)

High-pressure gun (1) with actuating lever (2) for high-pressure cleaner for cleaning of processing and cleaning surfaces, characterized in that the high-pressure gun (1) is equipped with an automatic reset a throttle valve function, the so-called Variopress function. High-pressure gun (1) with actuating lever (2) for high-pressure cleaner for cleaning processing and cleaning surfaces according to claim 1, characterized in that the throttle valve (17) is associated with a spring-loaded trigger lever (3). High-pressure gun (1) with actuating lever (2) for high-pressure cleaner for cleaning processing and cleaning surfaces according to claims 1 and 2, characterized in that the spring-loaded trigger lever (3) in its rest position
the throttle valve (17) holds in its open position. High-pressure gun (1) with actuating lever (2) for high-pressure cleaner for cleaning processing and cleaning surfaces according to claims 1 to 3, characterized in that the spring-loaded trigger lever (3) above the actuating lever (2) is arranged. High-pressure gun (1) with actuating lever (2) for high-pressure cleaner for cleaning processing and cleaning surfaces according to claims 1 to 4, characterized in that the spring-loaded trigger lever (3) is pivotally mounted on one side. High-pressure gun (1) with actuating lever (2) for high-pressure cleaner for cleaning processing and cleaning surfaces according to claims 1 to 5, characterized in that the spring-loaded trigger lever (3) and the actuating lever (2) are to operate simultaneously and with one hand. High-pressure gun (1) with actuating lever (2) for high-pressure cleaner for cleaning of processing and cleaning surfaces according to claims 1 to 6, characterized in that the spring-loaded trigger lever (3) is associated with the metering of the liquid flow through the gun valve (5). High-pressure gun (1) with actuating lever (2) for high-pressure cleaner for cleaning processing and cleaning surfaces according to claims 1 to 7, characterized in that the throttle valve (17) and the gun valve (5) arranged coaxially with one another in the connection piece of the high-pressure gun (1) are. High-pressure gun (1) with actuating lever (2) for high-pressure cleaner for cleaning processing and cleaning surfaces according to claims 1 to 8, characterized in that the throttle valve (17) and the passage valve (5) arranged parallel to each other in the connection piece of the high-pressure gun (1) are. High-pressure gun (1) with operating lever (2) for high-pressure cleaner for cleaning processing and cleaning surfaces according to claims 1 to 9, characterized in that the actuating lever (2) and the trigger lever in a parallel arrangement in a pivot axis (23, 24) with each other can be combined.

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