EP2922637B1 - Pistolet de pulvérisation à haute pression - Google Patents

Pistolet de pulvérisation à haute pression Download PDF

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Publication number
EP2922637B1
EP2922637B1 EP12794261.3A EP12794261A EP2922637B1 EP 2922637 B1 EP2922637 B1 EP 2922637B1 EP 12794261 A EP12794261 A EP 12794261A EP 2922637 B1 EP2922637 B1 EP 2922637B1
Authority
EP
European Patent Office
Prior art keywords
spray gun
pressure spray
nipple
gun according
valve housing
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.)
Active
Application number
EP12794261.3A
Other languages
German (de)
English (en)
Other versions
EP2922637A1 (fr
Inventor
Vitali Fischer
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE 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 Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP2922637A1 publication Critical patent/EP2922637A1/fr
Application granted granted Critical
Publication of EP2922637B1 publication Critical patent/EP2922637B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B05B1/3013—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 the controlling element being a lift valve
    • 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
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/01—Spray pistols, discharge devices
    • 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

Definitions

  • the invention relates to a high pressure spray gun for a high pressure cleaning device having the features of the preamble of claim 1.
  • a high pressure spray gun having a valve having a valve housing with an inlet channel and an outlet channel, and a movable closure body cooperating with a hand lever for releasing and closing a flow connection between the inlet and outlet channels, and a connector for making a releasable mechanical connection with a liquid delivery member and with a collinear connection nipple for establishing a fluid-tight connection with the liquid delivery member is known from the publication WO 2007/107230 A1 known.
  • the high-pressure cleaning gun is used in high-pressure cleaning devices and makes it possible to direct a high pressure cleaning device pressurized cleaning liquid, preferably water, on a surface to be cleaned, the delivery of the cleaning liquid can be controlled by the user by means of the hand lever.
  • the hand lever cooperates with a closing body, which releases and closes a flow connection between an inlet channel and an outlet channel of the valve housing depending on the position of the hand lever.
  • a liquid discharge member is connected to the high-pressure spray gun.
  • the latter may, for example, be a spray lance or a spray lance.
  • different liquid delivery organs can be connected to the high pressure spray gun.
  • the liquid delivery member is mechanically connected to a connection part of the high-pressure spray gun, and at the same time, a fluid-tight connection is established between the liquid delivery member and a connection nipple of the high-pressure spray gun.
  • connection nipple is designed as an end region of a pipe section, which is connected as a separate component during assembly of the high-pressure spray gun with the outlet channel. This increases the manufacturing and assembly costs of the high pressure spray gun.
  • the liquid delivery member requires a connecting sleeve, which on the inside identifies an annular groove in which a sealing ring is arranged. The connection sleeve can then be plugged with the interposition of the sealing ring on the connection nipple of the high-pressure spray gun.
  • the production of the inside annular groove and the mounting of the sealing ring in the annular groove is also associated with not inconsiderable costs.
  • a high-pressure spray gun with the features of the preamble of claim 1 is known from the publication WO 2005/077544 A1 known.
  • Object of the present invention is to develop a high-pressure spray gun of the type mentioned in such a way that it can be produced and mounted more cost-effectively and mechanically in a cost-effective manner and fluid-tight manner with a liquid delivery member.
  • the valve housing is connected in one piece with the connecting part and with the connecting nipple aligned colinearly with respect to the connecting part.
  • a releasable mechanical connection with a liquid discharge member for example with a spray lance
  • the connection nipple which carries an annular groove on the outside, in which a sealing ring is arranged, a fluid-tight connection with the liquid discharge member can be produced.
  • the high pressure spray gun according to the invention is characterized by a smaller number of components, which allow a more cost-effective production and assembly.
  • annular groove with a sealing ring on the outside of the connecting nipple has the advantage that in a simple manner, a sleeve-shaped part of the liquid delivery member can be plugged onto the connecting nipple with the interposition of the sealing ring.
  • the production of a flow-tight connection between the high-pressure spray gun and the liquid delivery member is therefore very simple. It is not necessary in this case to introduce into the inside of the connecting sleeve of the liquid delivery member a relatively large cost a groove in which the sealing ring can be positioned. Instead, an annular groove is introduced with little effort into the outside of the connection nipple.
  • a cylindrical connecting sleeve for example, can be plugged onto the connecting nipple having an annular groove on the outside, wherein at the same time a mechanical connection with the liquid-dispensing member can be achieved by means of the connecting part.
  • the connecting part according to the invention has a receptacle for inserting a complementary designed plug-in part of the liquid delivery member.
  • connection nipple dips into the receptacle. This makes it possible, for example, to insert a connection sleeve of the liquid delivery member into the receptacle, wherein an outside of the annular groove with the sealing ring exhibiting end portion of the connection nipple can dip into the connection sleeve.
  • connection nipple is aligned co-linear with the outlet channel of the valve housing.
  • the collinear arrangement reduces flow losses for a cleaning liquid flowing from the inlet channel via the outlet channel to the connection nipple.
  • the connecting part is configured in a preferred embodiment of the invention as a bayonet coupling part.
  • bayonet coupling parts are known per se to those skilled in the art.
  • the bayonet coupling part can form a receptacle into which a complementarily formed bayonet coupling part of the Liquid dispensing member can be used in a known manner in a certain rotational position and then rotated to lock relative to the recording.
  • the annular groove of the connection nipple is arranged in a space between the valve housing and connecting part, wherein the intermediate space is accessible via two opposite access openings.
  • the access openings allow removal from the surrounding the nipple in the circumferential direction annular groove.
  • the annular groove arranged on the outside of the connection nipple accommodates a sealing ring, for example an O-ring.
  • the sealing ring is made of an elastic material.
  • the annular groove having region of the connecting nipple is arranged in an advantageous embodiment of the invention in a housing of the high-pressure spray gun.
  • the housing may for example be formed by two half-shells, which receive the annular groove with the sealing ring having region of the connecting nipple and preferably also the valve housing between them.
  • the connecting part is rigidly connected in a preferred embodiment of the invention via two holding members with the valve housing, wherein an annular groove having the region of the connecting nipple is arranged between the two holding members.
  • the two holding members have in the annular groove having region of the connecting nipple a distance from each other, so that suitable molds can be positioned between the two holding members in the production of the annular groove.
  • the holding members are preferably rigidly connected to each other via a support ring.
  • the support ring gives the two support members a high mechanical strength.
  • connection nipple is conveniently formed on the support ring.
  • a spring element for example compression spring, which surrounds the connection nipple in the circumferential direction, in the axial direction on the support ring.
  • a support of a spring element is particularly advantageous if the connecting part is designed as a bayonet coupling part, because by means of the spring element, a complementary bayonet coupling part of the liquid discharge member can be acted upon by a spring force, which counteracts an unintentional release of the connection between the two coupling parts.
  • connection nipple carries in its adjoining the support ring end portion radially outwardly projecting clamping ribs. At the clamping ribs a compression nipple surrounding the nipple in the circumferential direction, which is supported on the support ring, are clamped.
  • connection nipple but also the outlet channel is arranged between the holding members.
  • the outlet channel is connected via two diametrically opposed connecting ribs rigidly connected to the support members. This increases the mechanical load capacity of the holding members and the connection part fixed to these.
  • the high-pressure gun has at least one metallic spring element and / or at least one spring element which is formed on the connecting part and made of a plastic material for acting on it the liquid delivery member with a spring force.
  • the spring force is preferably axially aligned. The spring force allows a particularly resilient mechanical connection between the high pressure spray gun and the liquid delivery member.
  • valve housing is formed in combination with the connecting part and the connecting nipple as a one-piece plastic molded part.
  • To the plastic molding of the hand lever may be hinged, which can be pivoted about a pivot axis by the user, thereby to move the closing member between a release position and a closed position back and forth.
  • the closing part may be designed as a valve tappet, which bears in a closed position in a flow-tight manner against a sealing surface of the valve housing and which occupies a distance from the sealing surface in a release position.
  • an advantageous embodiment of an inventive high-pressure spray gun is shown schematically, which is generally occupied by the reference numeral 10. It has a housing 12, which is formed by a first housing half shell 14 and a second housing half shell 16. The housing 12 has a handle 18 in the manner of a pistol.
  • a valve 20 is arranged with a valve housing 22 and with a closing part in the form of a valve stem 24.
  • the valve housing 22 comprises a central part 26 which is penetrated by a through-channel 28 and from the sides facing away from each other, a first leg 30 and a second leg 32 protrude.
  • the first leg 30 forms an outlet channel 34, to which a connection nipple 36 connects in an aligned manner.
  • the second leg 32 forms a support for a arranged at the free end of the second leg 32 pivot bearing 38.
  • a lever 40 is pivotally mounted on the pivot bearing 38.
  • the hand lever 40 comprises a first lever arm 42 and a second lever arm 44.
  • the first lever arm 42 extends substantially parallel to the handle 18, so that it can be grasped by the user together with the handle 18 with his fingers.
  • the second lever arm 44 is considerably shorter than the first lever arm 42.
  • At the free end of the second lever arm 44 of the valve stem 24 is located, which dips into the passageway 28 and in his in FIG. 4 shown closed position fluid-tight against a sealing surface 46 of the passage channel 28.
  • the through-channel 28 forms an inlet channel 48 of the valve housing 22.
  • the second lever arm 44 facing side of the sealing surface 46 branches off from the passageway 28 of the outlet channel 34. This is especially true FIG. 4 clear.
  • valve lifter 24 By pivoting the first lever arm 42, the valve lifter 24 can be moved back and forth between a closed position and a release position. In its closed position, the valve plunger 24 abuts against the sealing surface 46 and interrupts the flow connection between the inlet channel 48 and the outlet channel 34, and in its release position, the valve stem 24 is spaced from the sealing surface 46 and releases the flow connection.
  • a supply line such as a pressure hose, can be connected in a known manner, via which the high-pressure spray gun 10 can be supplied with cleaning liquid, which has been pressurized by a high-pressure cleaner.
  • a connecting part which is configured in the illustrated embodiment as a bayonet coupling part 50.
  • the bayonet coupling part 50 is integrally connected to the valve housing 22 via two holding members.
  • the two holding members are designed in the illustrated embodiment as a straight, spaced-apart holding ribs 52, 54.
  • the outlet channel 34 projecting from the middle part 26 of the valve housing 22 and the connection nipple 36 aligned with the outlet channel 34 are arranged between the two retaining ribs 52, 54, wherein the free end of the connecting nipple 36 dips into a receptacle 56 of the bayonet coupling part 50 aligned colinear with the connecting nipple 36.
  • the outlet channel 34 is integrally formed with the retaining ribs 52, 54 via diametrically opposed connecting ribs 58, 60 projecting radially from the outlet channel 34 connected. At its free end, the outlet channel 34 is surrounded by a support ring 62, on which the two retaining ribs 52, 54 are supported.
  • the connecting ribs 58 and 60 extend from the support ring 62 to the central part 26 of the valve housing 22.
  • connection nipple 36 carries on its outer side the support ring 62 immediately adjacent a plurality of clamping ribs 64 which are arranged distributed uniformly over the circumference of the connecting nipple 36 and on which a compression spring 66 shown in Figure 4 is clamped.
  • the compression spring 66 surrounds the adjoining the support ring 62 end portion of the connecting nipple in the circumferential direction and is supported in the axial direction on the support ring 62 from.
  • annular groove 68 which has a in the Figures 2 and 4 schematically shown sealing ring 70 receives.
  • the annular groove 68 is arranged in a gap 72 between the valve housing 22 and the bayonet coupling part 50, which is accessible via two lateral access openings.
  • the two access openings are opposite each other and are limited in the longitudinal direction of the connecting nipple 36 from the support ring 62 and the bayonet coupling part 50 and transversely to the longitudinal direction of the connecting nipple 36 of the two retaining ribs 52 and 54.
  • the two access openings make it possible to remove the annular groove 68. This will be discussed in more detail below.
  • the bayonet coupling part 50 has, in addition to the receptacle 56 two diametrically opposed recesses 78, 80, which are formed as openings of the bayonet coupling part.
  • recesses 78, 80 protrude elastically deformable spring arms 79 and 81, which are integrally formed on the bayonet coupling part 50.
  • a liquid discharge member such as a spray lance
  • a liquid dispensing member in the form of a pipe piece 82 is partially shown.
  • the pipe piece With its end region facing the high-pressure spray gun 10, 82 forms a bayonet coupling part 84 which is complementary to the bayonet coupling part 50 and has a connection sleeve 86, from which two bayonet wings 88, 90 protrude radially outward on opposite sides of the connection sleeve 86.
  • the connecting sleeve 86 forms a complementary to the receptacle 56 ausgestaltetes male part and can be inserted into the receptacle 56 and attached with an end portion on the connecting nipple 36.
  • connection sleeve 86 When attaching the connection sleeve 86 to the connection nipple 36, the sealing ring 70 assumes a position between the connection nipple 36 and the connection sleeve 86 and thereby ensures a flow-tight connection between the connection nipple 36 and the connection sleeve 86.
  • the receptacle 56 of the bayonet coupling part 50 of the high-pressure spray gun 10 is designed such that the connecting sleeve 86 with the two bayonet wings 88, 90 in a first rotational position against the action of the compression spring 66 can be inserted axially into the receptacle 56, wherein the connecting nipple 36 with the annular groove 68 and the sealing ring 70 positioned therein dips into the connecting sleeve 86, and then the connecting sleeve 86 can be rotated about its longitudinal axis by 90 °, so that the two bayonet wings 88, 90 dive into the recesses 78, 80 and the spring arms 79, 81 be subjected to an axially directed spring force.
  • the high pressure spray gun 10 can be manufactured inexpensively.
  • the side access openings between the valve housing 22 and the bayonet coupling part 50 make it possible in this case in a simple manner to demould the annular groove 86.
  • the housing 12 surrounds not only the valve housing 22 but also the retaining ribs 52, 54 and in particular the region of the connecting nipple 36, in which the annular groove 68 is arranged with the sealing ring 70.
  • the sealing ring 70 is protected against mechanical damage and also against ultraviolet solar radiation, which could affect the elasticity of the sealing ring 70 and thus its sealing effect.
  • the high-pressure spray gun 10 is therefore not only characterized by cost-effective production and assembly but also by a long service life.

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  • Nozzles (AREA)

Claims (14)

  1. Pistolet de pulvérisation à haute pression pour un appareil de nettoyage à haute pression, comprenant une soupape (20), qui présente un carter de soupape (22) doté d'un canal d'entrée (48) et d'un canal de sortie (34), ainsi qu'un corps de fermeture (24) mobile, qui coopère avec un levier manuel (40) pour libérer et fermer une liaison d'écoulement entre le canal d'entrée et le canal de sortie (48, 34), et d'un manchon de raccordement (36) destiné à établir une liaison libérable étanche aux écoulements avec un organe de distribution de liquide (82), le manchon de raccordement (36) étant formé sur le carter de soupape (22) et présentant, sur le côté externe, une rainure annulaire (68) dans laquelle est agencé un joint d'étanchéité (70), caractérisé en ce que le pistolet de pulvérisation à haute pression (10) comprend une pièce de liaison (50) formée sur le carter de soupape (22) et servant à établir une liaison mécanique libérable avec l'organe de distribution de liquide (82), le manchon de raccordement (36) étant orienté de manière colinéaire par rapport à la pièce de liaison (50), et la pièce de liaison (50) comprenant un logement (56) pour l'enfichage d'une pièce enfichable (86) de l'organe de distribution de liquide (82) réalisée de manière complémentaire.
  2. Pistolet de pulvérisation à haute pression selon la revendication 1, caractérisé en ce que le manchon de raccordement (36) s'enfonce dans le logement (56).
  3. Pistolet de pulvérisation à haute pression selon la revendication 1 ou 2, caractérisé en ce que le manchon de raccordement (36) est colinéaire au canal de sortie (34).
  4. Pistolet de pulvérisation à haute pression selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce de liaison est réalisée sous la forme d'une pièce d'accouplement à baïonnette (50).
  5. Pistolet de pulvérisation à haute pression selon l'une quelconque des revendications précédentes, caractérisé en ce que la rainure annulaire (68) est agencée dans un espace intermédiaire (72) entre le carter de soupape (22) et la pièce de liaison (50), l'espace intermédiaire (72) étant accessible par deux ouvertures d'accès opposées l'une à l'autre.
  6. Pistolet de pulvérisation à haute pression selon la revendication 5, caractérisé en ce qu'une zone du manchon de raccordement (36) comprenant la rainure annulaire (68) est agencée dans un boîtier (12) du pistolet de pulvérisation à haute pression (10).
  7. Pistolet de pulvérisation à haute pression selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce de liaison (50) est reliée rigidement au carter de soupape (22) par deux éléments de retenue (52, 54), une zone du manchon de raccordement (36) comprenant la rainure annulaire (68) étant agencée entre les deux éléments de retenue (52, 54)
  8. Pistolet de pulvérisation à haute pression selon la revendication 7, caractérisé en ce que les deux éléments de retenue (52, 54) sont reliés rigidement l'un à l'autre par une bague d'appui (62).
  9. Pistolet de pulvérisation à haute pression selon la revendication 8, caractérisé en ce que le manchon de raccordement (36) est formé sur la bague d' appui (62).
  10. Pistolet de pulvérisation à haute pression selon la revendication 9, caractérisé en ce que le manchon de raccordement (36) porte dans une zone d'extrémité située dans le prolongement de la bague d'appui (62) des nervures de serrage (64) faisant saillie radialement vers l'extérieur.
  11. Pistolet de pulvérisation à haute pression selon l'une quelconque des revendications 7 à 10, caractérisé en ce que le canal de sortie (34) est agencé entre les deux éléments de retenue (52, 54).
  12. Pistolet de pulvérisation à haute pression selon la revendication 11, caractérisé en ce que le canal de sortie (34) est relié rigidement aux éléments de retenue (52, 54) par deux nervures de liaison (58, 60) diamétralement opposées l'une à l'autre.
  13. Pistolet de pulvérisation à haute pression selon l'une quelconque des revendications précédentes, caractérisé en ce que le pistolet de pulvérisation à haute pression (10) comprend au moins un élément ressort (66) métallique et/ou au moins un élément ressort (79, 81) formé sur la pièce de liaison (50) et fait d'une matière plastique, servant à soumettre l'organe de distribution de liquide (82) à l'effet d'une force élastique.
  14. Pistolet de pulvérisation à haute pression selon l'une quelconque des revendications précédentes, caractérisé en ce que le carter de soupape (22) forme, en combinaison avec la pièce de liaison (50) et le manchon de raccordement (36), une pièce moulée en matière plastique d'un seul tenant.
EP12794261.3A 2012-11-21 2012-11-21 Pistolet de pulvérisation à haute pression Active EP2922637B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/073281 WO2014079494A1 (fr) 2012-11-21 2012-11-21 Pistolet de pulvérisation à haute pression

Publications (2)

Publication Number Publication Date
EP2922637A1 EP2922637A1 (fr) 2015-09-30
EP2922637B1 true EP2922637B1 (fr) 2017-10-04

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Application Number Title Priority Date Filing Date
EP12794261.3A Active EP2922637B1 (fr) 2012-11-21 2012-11-21 Pistolet de pulvérisation à haute pression

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EP (1) EP2922637B1 (fr)
CN (1) CN104797345B (fr)
WO (1) WO2014079494A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017194169A1 (fr) * 2016-05-13 2017-11-16 Alfred Kärcher Gmbh & Co. Kg Pistolet à soupape pour nettoyeur haute pression
EP3792007A4 (fr) 2018-05-07 2022-04-27 Positec Power Tools (Suzhou) Co., Ltd Bloc-batterie et ensemble outil électrique
CN109926378B (zh) * 2018-12-20 2023-11-21 莆田市博泰动力设备有限公司 控制阀高压清洗机

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
EP1254724A1 (fr) * 2001-05-03 2002-11-06 Nilfisk Advance A/S Dispositif de décharge pour un appareil de nettoyage à haute pression
DE102004006592B3 (de) * 2004-02-10 2005-11-10 Alfred Kärcher Gmbh & Co. Kg Handspritzpistole für ein Hochdruckreinigungsgerät
DE102006013005A1 (de) * 2006-03-22 2007-09-27 Alfred Kärcher Gmbh & Co. Kg Hochdruckspritzpistole
DE102009059044A1 (de) * 2009-12-10 2011-06-16 Alfred Kärcher Gmbh & Co. Kg Handstück für Dampfstrahlgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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Also Published As

Publication number Publication date
WO2014079494A1 (fr) 2014-05-30
CN104797345B (zh) 2016-12-14
EP2922637A1 (fr) 2015-09-30
CN104797345A (zh) 2015-07-22

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