EP3442722B1 - Ventilpistole für ein hochdruckreinigungsgerät - Google Patents

Ventilpistole für ein hochdruckreinigungsgerät Download PDF

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Publication number
EP3442722B1
EP3442722B1 EP16716870.7A EP16716870A EP3442722B1 EP 3442722 B1 EP3442722 B1 EP 3442722B1 EP 16716870 A EP16716870 A EP 16716870A EP 3442722 B1 EP3442722 B1 EP 3442722B1
Authority
EP
European Patent Office
Prior art keywords
valve
channel
holding element
ring
plunger
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
EP16716870.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3442722A1 (de
Inventor
Martin EFFERL
Bernd Rommel
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 EP3442722A1 publication Critical patent/EP3442722A1/de
Application granted granted Critical
Publication of EP3442722B1 publication Critical patent/EP3442722B1/de
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
    • B05B1/302—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 with a ball-shaped valve member
    • 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
    • B05B12/0022—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement
    • B05B12/0024—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement to a single position
    • B05B12/0026—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement to a single position to inhibit delivery
    • 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
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • 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 valve gun for a high-pressure cleaning device, with a valve that has a valve housing with a through channel extending from an inlet to an outlet, which has a first channel section in which a valve seat and a valve seat in a closed position under the action of a closing spring Closing body adjacent to the valve seat are arranged, the closing body being movable by moving a valve tappet into an open position spaced apart from the valve seat and the valve tappet surrounded by a sealing ring passes through a tappet channel opening into the first channel section and is mechanically coupled outside the valve housing to a release lever pivotable about a pivot axis .
  • valve gun With the aid of such a valve gun, the delivery of cleaning fluid that has been pressurized by a high-pressure cleaning device can be controlled.
  • Water to which a cleaning chemical can be mixed, is usually used as the cleaning liquid.
  • the valve gun has a valve with an inlet and an outlet, which are in flow communication with one another via a through-channel.
  • a pressure hose for example, can be connected to the inlet, and a spray lance, for example, can be connected to the outlet.
  • Pressurized cleaning fluid can be fed to the valve gun via the pressure hose, and the cleaning fluid can be directed at an object via the spray lance.
  • the through channel of the valve housing has a preferably straight first channel section.
  • a second channel section can connect to the first channel section, in particular aligned at an angle to the first channel section, which at its end facing away from the first channel section forms the outlet of the valve housing. But it can also it can be provided that at least one further channel section adjoins the second channel section, via which the second channel section is in flow connection with the outlet of the valve housing.
  • a valve seat is arranged in the first channel section.
  • a closing body is arranged in the first channel section, which rests on the valve seat under the action of a closing spring and which can be moved into an open position spaced apart from the valve seat by moving a valve tappet. In the open position, the closing body releases the flow connection between the inlet and the outlet of the valve housing, and in the closed position the closing body interrupts this flow connection.
  • the valve tappet protrudes from the valve housing. It passes through a tappet channel opening into the first channel section and is surrounded within the tappet channel by a sealing ring, so that it is ensured that the cleaning fluid cannot flow out of the valve housing via the tappet channel.
  • the valve tappet is mechanically coupled to a release lever that can be pivoted about a pivot axis. The tappet channel can be aligned with the first channel section.
  • the user has the option of pivoting the release lever from a rest position into a release position.
  • the valve tappet Under the action of the pivoting movement of the release lever, the valve tappet is displaced so that the closing body lifts off the valve seat.
  • the closing body Starting from its closed position, the closing body can thus be moved into its open position, which is spaced apart from the valve seat, by pivoting the release lever.
  • the transition of the closing body from the closed position to the open position takes place against the closing force exerted by the closing spring on the closing body and also against the pressure of the cleaning fluid acting on the closing body.
  • the pivoting movement of the release lever can be transmitted directly to the valve tappet in that the release lever rests on the valve tappet.
  • the pivoting movement of the release lever is transmitted to the valve tappet via a mechanical coupling element, for example via a coupling lever pivotably mounted about a coupling axis.
  • valve pistol in which a valve seat element forming the valve seat is supported with an end face facing away from the inlet of the valve housing on a wall of the through channel into which the tappet channel opens.
  • the valve seat element has an angled passage with an inlet section adjoining the valve seat and with an outlet section facing away from the valve seat.
  • valve with a valve seat element which, with its end face facing away from the inlet of the valve housing, is supported on a stepped narrowing of the first channel section.
  • the valve seat element has a straight passage. This simplifies the assembly of the valve seat element, since it does not have to assume a predefined angular position, and reduces the flow resistance of the valve seat element.
  • the cleaning liquid is heated strongly before it is fed to the valve gun. This increases the risk that scale will build up on the valve stem inside the valve housing.
  • These limescale deposits can lead to increased roughness of the circumferential surface of the valve tappet against which the sealing ring surrounding the valve tappet rests. The increased roughness impairs the sealing effect that can be achieved by the sealing ring, and since the valve tappet can move relative to the sealing ring, the lime particles deposited on the valve tappet can damage the sealing ring. Corresponding damage to the sealing ring and impairment of it The sealing effect can also be brought about by other abrasive particles, for example rust particles, which are carried along by the cleaning fluid.
  • a valve pistol which has a valve with a valve housing which is arranged in an angled tube and forms a valve seat, and with a closing body which rests on the valve seat under the action of a closing spring and which is moved by moving a valve tappet into an open position spaced from the valve seat is movable.
  • the angled tube forms an end wall with an opening through which the valve tappet penetrates.
  • the valve housing is in contact with the front wall via a contact ring on which a sealing ring is supported. The contact ring and the sealing ring each have a central opening for the valve tappet to pass through.
  • valve tappet has two stepped enlargements arranged axially offset from one another in the form of a first annular collar and a second annular collar, between which a sealing ring is arranged. The two expansions slide against the inner wall of the tappet channel through which the valve tappet passes.
  • the wiper unit is primarily used to protect guide arrangements and / or sealing arrangements.
  • the wiper unit comprises an essentially rotationally symmetrical retaining ring, a primary wiper and a secondary wiper arranged axially offset from the primary wiper.
  • the primary wiper forms a primary lip and the secondary wiper forms a secondary lip, the primary lip and the secondary lip sealingly contacting a sliding surface, in particular a piston rod.
  • the primary lip has a conical taper which exerts a wiping effect on the sliding surface.
  • a stuffing box which closes a chamber of a product to be sprayed.
  • the stuffing box is penetrated by a needle and has a cylindrical base body which surrounds the needle and comprises a bottom wall on which two scraper rings and a sealing ring arranged between the scraper rings are supported.
  • the object of the present invention is to develop a valve pistol of the type mentioned at the outset in a cost-effective manner in such a way that the risk of impairment of the sealing effect of the sealing ring surrounding the valve tappet and damage to the sealing ring is reduced.
  • a wiper ring is used, which is arranged in the tappet channel adjacent to the sealing ring surrounding the valve tappet.
  • the scraper ring rests on the valve tappet and is held together with the sealing ring in the tappet channel.
  • a holding element is used to hold the wiper ring and the sealing ring.
  • valve tappet If the valve tappet is moved in the tappet channel by pivoting the release lever, it moves relative to the scraper ring, which is held in the tappet channel, whereby the valve tappet slides along the scraper ring and thereby any lime particles or other abrasive particles that are deposited on the valve tappet removed from the valve lifter.
  • This ensures that the area of the valve tappet in which the sealing ring is in contact with the valve tappet is practically free of lime particles and other abrasive particles and that the sealing effect of the sealing ring is not impaired, as is the risk of the sealing ring from the lime particles and other abrasive particles.
  • the retaining element forms a retaining ring which surrounds the valve tappet.
  • the inner diameter of the retaining ring can be selected to be larger than the outer diameter of the valve tappet, so that the movement of the valve tappet is not impaired by the retaining ring.
  • the retaining ring has several radial extensions distributed over its circumference.
  • the radial extensions make it possible in a cost-effective way to press the retaining ring into the tappet channel with relatively low forces, with only low tolerance requirements having to be made on the diameter of the tappet channel.
  • the radial extensions can deform to such an extent that it is reliably held in the tappet channel in an axially immovable manner.
  • the retaining ring has an outline in the form of a polygon with rounded corners.
  • Such a configuration also makes it possible to press the retaining ring into the tappet channel with relatively low forces, with only low tolerance requirements having to be made on the diameter of the tappet channel.
  • the rounded corner areas of the polygon can rest on the wall of the tappet channel and deform to such an extent that the retaining ring is reliably held axially immovable in the tappet channel.
  • An insert part which forms the valve seat is preferably arranged in the first channel section, and the holding element is arranged at a distance from the insert part.
  • the wiper ring and the sealing ring surrounding the valve tappet are fixed by means of a holding element which is arranged at a distance from the insert part.
  • the insert part does not extend right up to the holding element, but rather the first channel section of the through-channel forms a free end region between the insert part and the holding part. It has been shown that the flow resistance of the valve can thereby be kept low.
  • the holding element itself is fixed in the tappet channel.
  • the holding element can be arranged, for example, in an end region of the tappet channel which extends as far as the through channel of the valve housing.
  • the holding element is designed in the form of a disk. This makes it possible to keep the structural size of the holding element and thus also the installation space of the valve housing required for mounting the holding element small.
  • the holding element can be pressed into the valve housing in an advantageous embodiment of the invention.
  • the holding element can be pressed into the tappet channel.
  • the holding element forms a stamped part or a turned part. This allows the holding element to be produced in large numbers at relatively low costs.
  • the holding element consists of a flat material, in particular a sheet metal material.
  • the outline of the retaining ring can, for example, form a square with rounded corners.
  • the holding element rests against a cross-sectional constriction of the tappet channel.
  • the holding element can be supported in the axial direction in relation to the longitudinal axis of the tappet channel.
  • the sealing ring is arranged between the scraper ring and a support ring surrounding the valve tappet, which rests on the valve tappet, the scraper ring on the side of the sealing ring facing the passage of the valve housing and the support ring on the side of the sealing ring facing away from the passage is arranged.
  • the support ring avoids a gap extrusion of the sealing ring, i.e. it ensures that the sealing ring is not squeezed into the narrow gap between the valve tappet and the tappet channel on the side facing away from the through-channel under the effect of very high fluid pressures.
  • the support ring rests against an inwardly directed step of the tappet channel.
  • the support ring can be supported in the axial direction in relation to the longitudinal axis of the tappet channel.
  • the holding element adjoins the scraper ring in the direction of the through channel.
  • the first channel section forms a free end region between an insert part and the holding element. It is favorable if the diameter of the end region is greater than the diameter of a through-hole in the insert part. Flow losses of the cleaning fluid can thereby be kept particularly low.
  • the through-hole of the insert part can form the area with the smallest diameter between the inlet and the outlet of the valve housing. This area can be made very short in the direction of flow of the cleaning liquid so that the cleaning liquid suffers only slight flow losses when flowing through this area.
  • the through-hole widens continuously in the direction of the end region of the first channel section. Abrupt changes in diameter can thereby be avoided in the area between the through-hole of the insert part and the end section.
  • the end region of the through hole can be designed conically, for example.
  • FIG. 1 an advantageous embodiment of a valve pistol according to the invention is shown schematically and denoted overall by the reference numeral 10.
  • the valve pistol 10 comprises a pistol housing 12 which is formed in the usual manner by a first housing shell 14 and a second housing shell (not shown in the drawing).
  • the gun housing 12 has a central housing area 16 which is arranged between a front housing area 18 and a rear housing area 20.
  • the front housing area 18 accommodates a valve 22 with a valve housing 24.
  • the valve housing 24 has an inlet 26 and an outlet 28 which are in flow connection with one another via a passage 30.
  • the outlet 28 protrudes from a front side 32 of the gun housing 12.
  • a spray lance for example, can be connected to the outlet 28.
  • the inlet 26 protrudes from an underside 34 of the gun housing 12.
  • a pressure hose 36 is connected to the inlet 26.
  • the pressure hose 36 has a hose nipple 38 which, surrounded by a sealing ring, can be inserted into the inlet 26 of the valve housing 24 and secured to the valve housing 24 by means of a union nut 40.
  • the union nut 40 is surrounded by a kink protection 42.
  • a handle 44 projects from the rear housing area 20 of the pistol housing 12, from the free end area 46 of which, in the embodiment shown, a protective bracket 48 extends as far as the front housing area 18.
  • the protective bracket 48, the central housing area 16 and the handle 44 surround an engagement opening 50 into which the user can engage with his fingers.
  • the valve 22 is in Figure 2 shown enlarged. How out Figure 2 As can be seen, the through-channel 30 has a straight first channel section 52, which adjoins the inlet 26 in the direction of flow 54 of the cleaning fluid and, in the direction of flow 54, a first step 56 directed radially inward at a distance from the inlet 26 and in the direction of flow 54 at a distance from the first Step 56 has a second step 58 directed radially inward. Downstream of the second step 58, the first channel section 52 forms a free end region 60.
  • a second channel section 62 adjoins the free end region 60, which is oriented at an angle to the first channel section 52, that is, the longitudinal axis 64 of the second channel section 62 is oriented at an angle to the longitudinal axis 66 of the first channel section 52.
  • the angle is between the longitudinal axis 64 and the longitudinal axis 66 is greater than 90 °, the angle is, for example, 115 °.
  • a third channel section 68 of the through-channel 30 adjoins the second channel section 62.
  • the third channel section 68 extends as far as the outlet 28 of the valve housing 24.
  • the longitudinal axis 70 of the third channel section 68 is oriented at an angle to the longitudinal axis 64 of the second channel section 62.
  • the longitudinal axis 70 of the third channel section 68 runs perpendicular to the longitudinal axis 66 of the first channel section 52.
  • valve housing 24 has a stepped tappet channel 72 which is arranged in alignment with the first channel section 52 and adjoins the free end region 60 of the first channel section 52.
  • the tappet channel 72 extends as far as an upper side 74 of the valve housing 24 facing away from the inlet 26.
  • an insert part 76 is arranged, which is cylindrical and rests against the second step 58 with an end face 78 facing away from the inlet 26.
  • the insert part 76 has a straight through hole 80 which extends from a valve seat 82 of the insert part 76 facing the inlet 26 to the end face 78, an end region of the through hole 80 immediately adjacent to the end face 78 forming a conical widening 84.
  • the diameter of the through hole 80 upstream of the enlargement 84 is selected to be smaller than the diameter of the free end region 60 of the first channel section 52.
  • a closing body 86 is arranged in the first channel section 52, which in the embodiment shown is spherical. In the in the Figures 1 and 2 In the closed position shown, the closing body 86 rests on the valve seat 82. A closing force is applied to the closing body 86 by means of a closing spring 88, so that it is pressed against the valve seat 82.
  • the closing spring 88 is supported with her the end facing the closing body 86 on a first spring holder 90, which rests on the closing body 86, and with its end facing away from the closing body 86, the closing spring 88 is supported on a second spring holder 92, which is inserted into the first channel section 52 and with a radial outwardly directed flange 94 rests against the first step 56 of the first channel section 52.
  • the tappet channel 72 has an input section 96 extending from the upper side 74 of the valve housing 24, which merges via an outwardly directed first stepped widening 98 into a central channel section 100, to which an output section 104 is connected via a second stepped widening 102, which in the free end region 60 of the first channel section 52 opens.
  • the tappet channel 72 is penetrated by a valve tappet 106, which extends as far as the closing body 86 and protrudes with its free end 108 from the upper side 74 of the valve housing 24.
  • valve tappet 106 In the area of the central channel section 100, the valve tappet 106 is surrounded by a support ring 110 and a scraper ring 112. A sealing ring 114, which surrounds the valve tappet 106, is arranged between the support ring 110 and the scraper ring 112. The sealing ring 114 rests tightly both on the outer circumference of the valve tappet 106 and on the wall of the central channel section 100 and thereby ensures that cleaning fluid cannot flow out of the through-channel 30 via the tappet channel 72.
  • the support ring 110 rests with its upper side facing away from the sealing ring 114 on the first stepped widening 98 of the plunger channel 72 and avoids a gap extrusion of the sealing ring 114, ie it ensures that the sealing ring 114 does not enter the gap between the Valve tappet 106 and the wall of the input section 96 of the tappet channel 72 is squeezed.
  • the inner edge of the scraper ring 112 rests on the valve tappet 106, so that the valve tappet 106 is stripped from the scraper ring 112 when it moves relative to the scraper ring 112.
  • the valve 22 has a holding element 116.
  • FIG Figure 3 A first advantageous embodiment of the holding element 116 is shown in FIG Figure 3 shown enlarged in the form of a retaining ring 117.
  • the retaining ring 117 is manufactured as a stamped part from a sheet metal material and has radial extensions 120 with an arcuate outer contour, which are arranged uniformly distributed over its outer circumference 118.
  • FIG Figure 4 A second advantageous embodiment of the holding element 116 is shown in FIG Figure 4 shown enlarged in the form of a retaining ring 119.
  • the retaining ring 119 is manufactured as a turned part from a square material and has an outline in the form of a polygon with rounded corners 121.
  • the holding element 116 is pressed into the output section 104 of the tappet channel 72 and rests against the second stepped widening 102 of the tappet channel 72. With the aid of the holding element 116, the support ring 110, the scraper ring 112 and the sealing ring 114 are held in the central channel section 100 of the tappet channel 72.
  • the valve tappet 106 can be displaced in the direction of the inlet 26 by pivoting a release lever 122, so that the closing body 86 lifts off the valve seat 82 against the closing force of the closing spring 88 and thereby releases the flow connection between the inlet 26 and the outlet 28.
  • the release lever 122 is arranged in the handle 44 and is mounted on the first housing shell 14 and the second housing shell so as to be pivotable about a pivot axis 124. The user can pull it out of the in Figure 1 shown rest position in the direction of the front housing area 18 can be pivoted.
  • the pivot axis 124 of the release lever 122 is arranged in the free end region 46 of the handle 44. In its rest position, the release lever 122 protrudes with an actuating surface 128 from the rear side of the handle 44 facing away from the front housing area 18.
  • the release lever 122 is acted upon by a first return spring 130 with a resilient return force. Under the action of the first return spring 130, the release lever 122 automatically assumes its rest position when the user releases the release lever 122.
  • the release lever 122 In its rest position, the release lever 122 is automatically locked with the aid of a first locking member 132.
  • the essentially L-shaped first locking member 132 is pivotably mounted in the handle 44.
  • a first leg 134 of the first locking member 132 protrudes from the front side of the handle 44 facing the front housing area 18.
  • a second leg 136 of the first locking member 132 facing the release lever 122 rests with its free end 140 on the release lever 122 in the rest position of the release lever 122 and prevents it from pivoting.
  • a second return spring 142 By means of a second return spring 142, the first locking member 132 is in its in Figure 1 shown locking position pressed.
  • the release lever 122 pivots unhindered about pivot axis 124 from first locking member 132. If the user releases the handle 44 again, the release lever 122 is automatically pivoted into its rest position by the first return spring 130 and the first locking member 132 is pivoted by the second return spring 142 into the locking position in which it locks the release lever 122.
  • a pivoting movement of the release lever 122 in the direction of the front housing area 18 is transmitted to the valve tappet 106 via a coupling lever 146 arranged in the central housing area 16.
  • the coupling lever 146 is mounted on the valve housing 24 so as to be pivotable about a coupling axis 148.
  • the coupling axis 148 is aligned parallel to the pivot axis 124.
  • the coupling lever 146 has an adjustable force application element 150 which rests on the free end of the valve tappet 106.
  • the coupling lever 146 has a first coupling roller 154 and a second coupling roller 156 at a distance from one another which, when the release lever 122 is pivoted in the direction of the front housing area 18, slide one after the other along a section of a guide track 158 which is formed by an end face 160 of the release lever 122 facing the coupling lever 146. If the release lever 122 is pivoted in the direction of the front housing area 18, the first coupling roller 154 initially slides along a rear end area of the guide track 158 and the coupling lever 146 is pivoted in such a way that the force applying element 150 pushes the valve tappet 106 in the direction of the inlet 26 of the valve housing 24 shifts.
  • the release lever 122 is pivoted back into its rest position by the first return spring 130 and at the same time the coupling lever 146 is pivoted back by the valve tappet 106 into its starting position, since the valve tappet 106 over the Closing body 86 is acted upon by the closing spring 88 with a restoring force.
  • the closing body 86 assumes its closed position in which it rests against the valve seat 82 again.
  • the second locking member 162 is designed as a sliding body 164 which is positioned above the coupling lever 146 on the gun housing 12 between an in Figure 1 Locked position shown and a parking position not shown in the drawing can be moved back and forth.
  • the sliding body 164 has a locking cam 166 which, in the blocking position, rests directly on the upper side of the coupling lever 146 facing away from the release lever 122 or is arranged at a short distance from the upper side of the coupling lever 146 and prevents the coupling lever 146 from pivoting.
  • the sliding body 164 can be displaced to the rear in the direction facing away from the front housing area 18, in which direction the locking cam 166 releases the coupling lever 146.
  • the sliding body 164 can be locked in the locked position and in the parking position with the gun housing 12.
  • valve tappet 106 When the valve 22 is opened and closed, the reciprocating movement of the valve tappet 106 has the consequence that lime particles and other abrasive particles, for example rust particles, which are deposited on the valve tappet 106, are wiped off the valve tappet 106 with the aid of the scraper ring 112.
  • the valve tappet 106 therefore has only a slight roughness in its stripped area, even after a long period of use. In the stripped area, the sealing ring 114 lies tightly against the valve tappet 106 and the sealing effect of the sealing ring 114 is not impaired by lime particles and other abrasive particles. Damage to the sealing ring 114 by lime particles or other abrasive particles can also be avoided by using the wiper ring 112 held in the tappet channel 72.
  • the passage channel 30 has a relatively large diameter and therefore forms only a small flow resistance for the cleaning liquid.
  • the free end region 60 of the first channel section has 52 has a considerable diameter.
  • the area with the smallest flow cross section is formed by the through hole 80 of the insert part 76.
  • the through-hole 80 can, however, be designed to be relatively short, so that the cleaning fluid also suffers only slight flow losses in the area of the insert part 76.

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EP16716870.7A 2016-04-15 2016-04-15 Ventilpistole für ein hochdruckreinigungsgerät Active EP3442722B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/058419 WO2017178073A1 (de) 2016-04-15 2016-04-15 Ventilpistole für ein hochdruckreinigungsgerät

Publications (2)

Publication Number Publication Date
EP3442722A1 EP3442722A1 (de) 2019-02-20
EP3442722B1 true EP3442722B1 (de) 2021-06-09

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EP16716870.7A Active EP3442722B1 (de) 2016-04-15 2016-04-15 Ventilpistole für ein hochdruckreinigungsgerät

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Country Link
EP (1) EP3442722B1 (zh)
CN (1) CN109070106B (zh)
DK (1) DK3442722T3 (zh)
WO (1) WO2017178073A1 (zh)

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Publication number Priority date Publication date Assignee Title
CN108006223A (zh) * 2017-11-08 2018-05-08 中国航空工业集团公司金城南京机电液压工程研究中心 一种具有密封补偿功能的柱塞活门体
CN113266063B (zh) * 2021-04-25 2022-06-14 厦门水乐卫浴有限公司 一种洁身器

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Publication number Priority date Publication date Assignee Title
DE3720241C2 (de) * 1986-09-26 1994-09-22 Wolfgang Suttner Ventilpistole für ein Hochdruckreinigungsgerät
DE10159680C1 (de) 2001-11-30 2003-05-08 Kaercher Gmbh & Co Alfred Schließvorrichtung für die Flüssigkeitsabgabeleitung eines Hochdruckreinigungsgerätes
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CN109070106B (zh) 2021-05-14
WO2017178073A1 (de) 2017-10-19
EP3442722A1 (de) 2019-02-20
CN109070106A (zh) 2018-12-21
DK3442722T3 (da) 2021-07-26

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