EP0408865B1 - Pistolet à valve, en particulier pour appareil de nettoyage à haute pression - Google Patents

Pistolet à valve, en particulier pour appareil de nettoyage à haute pression Download PDF

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Publication number
EP0408865B1
EP0408865B1 EP90109782A EP90109782A EP0408865B1 EP 0408865 B1 EP0408865 B1 EP 0408865B1 EP 90109782 A EP90109782 A EP 90109782A EP 90109782 A EP90109782 A EP 90109782A EP 0408865 B1 EP0408865 B1 EP 0408865B1
Authority
EP
European Patent Office
Prior art keywords
hand lever
roller
abutment
valve
pistol
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.)
Expired - Lifetime
Application number
EP90109782A
Other languages
German (de)
English (en)
Other versions
EP0408865A2 (fr
EP0408865A3 (en
Inventor
Lothar Hartman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suttner GmbH and Co KG
Original Assignee
Suttner GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suttner GmbH and Co KG filed Critical Suttner GmbH and Co KG
Priority to AT90109782T priority Critical patent/ATE98912T1/de
Publication of EP0408865A2 publication Critical patent/EP0408865A2/fr
Publication of EP0408865A3 publication Critical patent/EP0408865A3/de
Application granted granted Critical
Publication of EP0408865B1 publication Critical patent/EP0408865B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • B08B3/028—Spray guns
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/20612—Hand

Definitions

  • the invention relates to a valve gun according to the preamble of claim 1.
  • the teaching of the invention relates generally to valve guns of the structure explained above, that is to say without being limited to the range of high-pressure cleaning devices. Nevertheless, to simplify the explanation, the teaching of the invention will now and in the following be explained using the example of a valve gun for a high-pressure cleaning device, in particular because the teaching of the invention is of particular importance for this area of application. Furthermore, the teaching of the invention is independent of whether the valve body of the valve is opened by pushing or pulling, that is to say whether a plunger or a pull rod, a pulling cable or the like is used as the force transmission element. Regardless of this, the power transmission element is sometimes also referred to below as a plunger, because force transmission elements designed as plungers are particularly widespread in valve guns of the type in question.
  • the known valve gun from which the invention is based (DE-A 3 518 492) has a ball valve with a spring-loaded valve ball as the valve body.
  • the essential force component is that from the system pressure.
  • the opening force required when opening is the product of the system pressure and cross-sectional area of the valve seat.
  • the required actuation force is reduced by the lever ratio on the hand lever. There is a lower limit for the lever ratio, which is determined by the available swinging force of the hand lever and the minimum required actuation path of the ram.
  • a large lever ratio is initially provided in the previously explained valve gun during the opening process; the actuating arm is very short compared to the hand lever.
  • the opening force can be reduced to 20 to 30 N instead of the previously known 100 N on the hand lever.
  • the holding force can be reduced even further when the valve body is open by working with a double lever reduction (DE-C 3 527 922) or using a toggle lever drive (GB-A 513 013).
  • a double lever reduction DE-C 3 527 922
  • a toggle lever drive GB-A 513 013
  • Both have considerable disadvantages, namely, they are extremely complex to construct and, at least in the case of the toggle lever drive, in turn leads to a loss of lever arm when the valve body is opened, that is to say to an increase in the opening force.
  • the invention is based on the object, the above-described, with regard to the opening force already very useful known valve gun with little design effort so that the hand force required when the valve body is open can be made as low as possible.
  • the above-mentioned object is achieved in a valve gun with the features of the preamble of claim 1 by the features of the characterizing part of claim 1.
  • the holding force can be minimized even when the valve body is open.
  • the holding force can be made arbitrarily small by designing the gear connection, i.e. reduced to practically zero.
  • the valve gun shown schematically in FIG. 1 is intended for a high-pressure cleaning device and initially has a gun housing 1, which in the exemplary embodiment shown here consists of plastic and is made of two half-shells or can also be formed in one piece.
  • a handle 2 is formed on the gun housing 1 and a valve 3 is arranged in the gun housing 1.
  • the valve 3 is located between a pressure medium connection 4 and an outlet connection 5, to which, for example, a spray lance (not shown here) can be connected.
  • the pressure medium connection 4 and the outlet connection 5 are integrated with one another in a single, continuous angled tube 6, in which the valve 3 is also arranged.
  • the valve 3 opens against the system pressure, which is shown in the schematic illustration merely as an example as a spherical valve body 9 facing the pressure medium connection 4, loaded by a valve spring 7 in the closing direction and sealingly coming into contact with a valve seat 8. There are other ways of realizing this too. It is also shown that a plunger 10 is provided for opening movement of the valve body 9 against the spring force of the valve spring 7 and the closing force resulting from the system pressure on the valve body 9.
  • the force transmission element 10, here designed as a plunger serves to transmit force to the valve body 9 from a hand lever 12 which is pivotably mounted on the handle 2 on a pivot axis 11 in the gun housing 1.
  • the hand lever 12 has an actuating arm 13 which comes into contact with the force transmission element 10, which in the exemplary embodiment shown is an integral part of the hand lever 12 itself, but also readily protrudes on the opposite side of the pivot axis 11 or lies at a somewhat measured angle with respect to the hand lever 12 can.
  • the force transmission element 10 which in the exemplary embodiment shown is an integral part of the hand lever 12 itself, but also readily protrudes on the opposite side of the pivot axis 11 or lies at a somewhat measured angle with respect to the hand lever 12 can.
  • the tappet 10 For the purpose of a sufficient flow cross-section, the tappet 10 must be displaceable by the actuating arm 13 over a specific (minimum) actuation path when the valve body 9 is open.
  • the lever ratio between the hand lever 12 and the actuating arm 13 is ultimately ultimately classically determined by the upwardly limited pivoting path of the hand lever 12 and the downwardly limited actuating path of the actuating arm 13.
  • the hand lever 12 not only performs a pivoting movement about the pivot axis 11, but that this pivoting movement about the pivot axis 11 is partially superimposed on a displacement movement approximately in the direction of movement of the power transmission element 10.
  • the pivot axis 11 of the hand lever 12 in the gun housing 1 is namely essentially displaceable in the direction of movement of the force transmission element 10 over a certain distance.
  • the pivot axis 11 is mounted in the gun housing 1 or in a separate support part in an elongated hole 14 which extends approximately in the direction of movement of the plunger 10 and is displaceable therein. Accordingly, the pivot axis could also be mounted in a corresponding elongated hole in the hand lever.
  • the displacement movement of the hand lever 12 must be initiated in some way. This is done here in such a way that the displacement movement of the hand lever 12 is derived from the pivoting movement and for this purpose an effective gear connection, in particular a wedge gear connection 15, is provided between the hand lever 12 and the gun housing 1 or the angle tube 6.
  • an effective gear connection in particular a wedge gear connection 15
  • Other gear connections for example via a tension element, are also possible, but a wedge gear connection 15 is particularly simple to construct.
  • the transmission connection 15 can be implemented particularly expediently in that on the hand lever 12 at a distance from the pivot axis 11 a transmission part, in particular a gear roller 16, and on the gun housing 1 or on the angle tube 6 a stationary abutment part, in particular an abutment roller 17, is attached. It is obvious that corresponding roles as gear or abutment parts lead to rolling friction and thus to a lower coefficient of friction than pure sliders or the like.
  • the force transmission element 10 assumes its uppermost position and the gear roller 16 with a little distance to the side of the abutment roller 17 lies, the effective distance of the abutment roller 17 to the pivot axis 11, ie the clear distance between the abutment roller 17 and the pivot axis 11, is less than the effective distance of the gear roller 16 to the pivot axis 11, ie here the distance between the center points.
  • the lateral distance of the center of the pivot axis 11 from the center of the force transmission element 10 is relatively small, ie the lever ratio is relatively large.
  • the pivot axis 11 is pressed into the upper rounding of the elongated hole 14 and fixed therein and the hand lever 12 begins to pivot about the pivot axis 11.
  • the force transmission element 10 in FIG. 4 is pressed down, for example by a distance of approximately 1 mm. This movement is accompanied by a pivoting movement of the gear roller 16 about the pivot axis 11.
  • valve body 9 With the valve body 9 slightly open and thus largely relieved of pressure, the gear roller 16 now comes to bear laterally on the abutment roller 17. This situation is shown in dashed lines in FIG. 4, it is the pressure-relieved position of the valve body 9.
  • the system pressure here has dropped to, for example, 200 bar.
  • the restoring force on the valve body 9 only results from the effective cross-sectional area of the force transmission element 10. no longer from the effective cross-sectional area of the valve body blocking the valve seat 9.
  • the pivot axis 11 now moves downward in the elongated hole 14 in accordance with the rolling movement of the gear roller 16 on the abutment roller 17, so that a displacement of the hand lever 12 is produced parallel to itself, which leads to a corresponding longitudinal displacement of the force transmission element 10.
  • the holding force with the valve body 9 open is already relatively low in this system. However, it can be reduced even further, to practically 0 N or even in the sense of self-retention.
  • the wedge gear connection 15 can be designed so that when the valve body 9 is open, it derives practically all of the restoring force caused by the force transmission element 10 into the stationary abutment.
  • the gear part, in particular the gear roller 16 is in contact with the abutment part, in particular with the abutment roller 17, so that the contact point or the contact line is only slightly offset from the point of action or line of action of the Force transmission element 10 exerted restoring force on the abutment roller 17.
  • the abutment roller 17 is located exactly in the direction of alignment with the central axis of the force transmission element 10.
  • this is not absolutely necessary. Rather, the previously explained mode of operation can also be achieved if the abutment roller 17 is in a completely different location, for example also beyond the pivot axis 11 lies. Even then there is a force flow path for the restoring force of the force transmission element 10, which ultimately ends at the indicated line of action in the abutment roller 17.
  • this angle tube 6 has a bearing bracket 19, which is attached to the angle tube 6, in particular welded on here. This has the advantage over the attachment to the gun housing 1 that the gun housing 1 can be kept free of forces.
  • the invention succeeds in an extraordinarily simple constructive manner in realizing an optimal force curve on the hand lever of a valve gun, namely to make the initial opening force as low as possible, nevertheless realizing the necessary opening travel for the valve body and at the same time practically holding the force when the valve body is open to be arbitrarily small.
  • the lever ratio at the beginning of the opening movement can easily be increased to 1:12 to 1:20, since the required actuation path of the valve body of, for example, 3 mm is nevertheless achieved due to the superimposed displacement movement.

Landscapes

  • Mechanically-Actuated Valves (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Nozzles (AREA)
  • Carbon And Carbon Compounds (AREA)

Claims (4)

  1. Pistolet à soupape, en particulier, pour un appareil de nettoyage sous haute pression, comprenant un logement de pistolet (1) muni d'une poignée (2), une soupape (3) disposée dans le logement de pistolet (1), qui doit s'ouvrir à l'encontre de la pression du système, munie d'un élément (10) de transmission de force servant au mouvement d'ouverture d'un corps de soupape (9), un levier manuel (12) monté en pivotement sur un axe de pivotement (11) dans le logement de pistolet (1) contre la poignée (2), le levier manuel (12) étant apte à pivoter sur une voie de pivotement déterminée et présentant un bras d'entraînement (13) venant s'appuyer contre l'élément (10) de transmission de force, l'élément (10) de transmission de force pouvant coulisser par rapport au bras d'entraînement (13) sur une voie d'entraînement déterminée et un rapport de levier déterminé étant préétabli entre le levier manuel (12) et le bras d'entraînement (13), caractérisé en ce que l'axe de pivotement (11) dans le logement de pistolet (1) ou dans le levier manuel est monté dans un trou oblong (14) s'étendant à peu près dans la direction de mouvement de l'élément (10) de transmission de force et étant apte à y coulisser, si bien qu'au mouvement de pivotement du levier manuel (12) avec le bras d'entraînement (13) autour de l'axe de pivotement (11), est superposé partiellement un mouvement de coulissement, en ce que le mouvement de coulissement du levier manuel (12) dérive du mouvement de pivotement, une liaison de commande active, en particulier une liaison (15) par commande clavetée étant prévue à cet effet entre le levier manuel (12) et le logement de pistolet (1) ou encore un coude ininterrompu (6) disposé dans le logement de pistolet (1), et en ce que, contre le levier manuel (12), à l'écart de l'axe de pivotement (11), on installe un organe de commande, en particulier un cylindre de commande (16), et contre le logement de pistolet (1) ou contre le coude (6), un élément de butée inamovible, en particulier un cylindre de butée (17).
  2. Pistolet à soupape selon la revendication 1, caractérisé en ce que, lorsque le corps de soupape (9) est fermé, l'organe de commande, c'est-à-dire en particulier le cylindre de commande (16), est disposé latéralement à une certaine distance de l'élément de butée, c'est-à-dire en particulier à une certaine distance du cylindre de butée (17), et l'écartement de travail entre l'élément de butée, c'est-à-dire en particulier le cylindre de butée (17), et l'axe de pivotement (11) est inférieur à l'écartement de travail entre l'organe de commande, c'est-à-dire en particulier le cylindre de commande (16), et l'axe de pivotement (11), en ce que, lorsque le corps de soupape (9) est légèrement ouvert, partant détendu dans une large mesure, l'organe de commande, c'est-à-dire en particulier contre le cylindre de commande (16), vient s'appuyer latéralement contre l'élément de butée, c'est-à-dire en particulier le cylindre de butée (17), et en ce que, lors du mouvement de pivotement ultérieur du levier manuel (12), l'organe de commande, c'est-à-dire en particulier sur le cylindre de commande (16), glisse ou roule sur l'élément de butée, c'est-à-dire en particulier le cylindre de butée (17), conjointement avec le levier manuel (12), en étant soumis à un coulissement longitudinal simultané.
  3. Pistolet à soupape selon la revendication 1 ou 2, caractérisé en ce que, lorsque le corps de soupape (9) est complètement ouvert, l'organe de commande, en particulier le cylindre de commande (16), s'appuie contre l'élément de butée, en particulier contre le cylindre de butée, de telle sorte que le point d'appui ou la ligne d'appui n'est que très légèrement décalée par rapport au point d'action ou à la ligne d'action de la force de rappel exercée par l'élément (10) de transmission de force sur le cylindre de butée (17).
  4. Pistolet à soupape selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'un étrier de montage (19) pour l'axe de pivotement (11) et éventuellement pour l'élément de butée, en particulier pour le cylindre de butée (17), est monté, en particulier soudé, contre le coude (6).
EP90109782A 1989-07-15 1990-05-23 Pistolet à valve, en particulier pour appareil de nettoyage à haute pression Expired - Lifetime EP0408865B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90109782T ATE98912T1 (de) 1989-07-15 1990-05-23 Ventilpistole, insbesondere fuer ein hochdruckreinigungsgeraet.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3923499 1989-07-15
DE3923499 1989-07-15
DE3926461A DE3926461A1 (de) 1989-07-15 1989-08-10 Ventilpistole, insbesondere fuer ein hochdruckreinigungsgeraet
DE3926461 1989-08-10

Publications (3)

Publication Number Publication Date
EP0408865A2 EP0408865A2 (fr) 1991-01-23
EP0408865A3 EP0408865A3 (en) 1991-07-10
EP0408865B1 true EP0408865B1 (fr) 1993-12-22

Family

ID=25883084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90109782A Expired - Lifetime EP0408865B1 (fr) 1989-07-15 1990-05-23 Pistolet à valve, en particulier pour appareil de nettoyage à haute pression

Country Status (5)

Country Link
US (1) US5118080A (fr)
EP (1) EP0408865B1 (fr)
AT (1) ATE98912T1 (fr)
DE (2) DE3926461A1 (fr)
DK (1) DK0408865T3 (fr)

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EP3079832B1 (fr) 2013-12-12 2017-10-25 Alfred Kärcher GmbH & Co. KG Pistolet à valve pour appareil de nettoyage haute pression
EP3079833B1 (fr) 2013-12-12 2018-09-26 Alfred Kärcher SE & Co. KG Pistolet à valve pour appareil de nettoyage haute pression
CN106269613B (zh) * 2015-06-29 2018-07-06 永春县永荣信息科技有限公司 一种丁酮除漆枪
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Also Published As

Publication number Publication date
DE3926461A1 (de) 1991-01-24
DE59003943D1 (de) 1994-02-03
ATE98912T1 (de) 1994-01-15
DK0408865T3 (da) 1994-01-31
DE3926461C2 (fr) 1993-05-19
EP0408865A2 (fr) 1991-01-23
US5118080A (en) 1992-06-02
EP0408865A3 (en) 1991-07-10

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