EP3442713A1 - Valve device and valve gun for a high-pressure cleaning device - Google Patents
Valve device and valve gun for a high-pressure cleaning deviceInfo
- Publication number
- EP3442713A1 EP3442713A1 EP16720368.6A EP16720368A EP3442713A1 EP 3442713 A1 EP3442713 A1 EP 3442713A1 EP 16720368 A EP16720368 A EP 16720368A EP 3442713 A1 EP3442713 A1 EP 3442713A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- valve seat
- valve device
- closing
- closing body
- 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.)
- Granted
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 56
- 239000000919 ceramic Substances 0.000 claims abstract description 20
- 239000006185 dispersion Substances 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 38
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 20
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 16
- 229910010293 ceramic material Inorganic materials 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000013270 controlled release Methods 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 8
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract description 6
- 229910001928 zirconium oxide Inorganic materials 0.000 abstract description 6
- 229910052574 oxide ceramic Inorganic materials 0.000 abstract description 3
- 239000011224 oxide ceramic Substances 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 26
- 238000010168 coupling process Methods 0.000 description 26
- 238000005859 coupling reaction Methods 0.000 description 26
- 230000009471 action Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 210000002445 nipple Anatomy 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
-
- 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
Definitions
- the invention relates to a valve device for a high-pressure cleaning device for controlling the flow of a cleaning liquid, in particular for the controlled release of a cleaning liquid, having a valve housing having a passage extending from a valve inlet to a valve outlet, in which a valve seat member is arranged which forms a valve seat , And in which a closing body is arranged, which is acted upon by a closing spring with a closing force in the direction of the valve seat and in a closed position against the valve seat and movable by displacing a valve stem of the valve means in an open position spaced from the valve seat open position.
- the invention relates to a valve gun for a high-pressure cleaner with such a valve device.
- a cleaning liquid can be pressurized and directed to an object to be cleaned.
- water is usually used, to which a cleaning chemical may be mixed.
- the control of the flow of the cleaning liquid by means of at least one valve means, with the aid of which in particular the delivery of cleaning liquid can be controlled.
- the valve means comprises a valve housing having a passageway extending from a valve inlet to a valve outlet.
- a valve seat member is arranged, which forms a valve seat.
- a closing body is arranged in the passage, which is acted upon by a closing spring with a closing force in the direction of the valve seat.
- the closing body By displacing a valve stem of the valve device, the closing body can be moved into an open position spaced from the valve seat in which it makes a flow connection from the valve inlet to the valve seat Valve outlet releases. In the closed position of the valve body, the flow connection between the valve inlet and the valve outlet is interrupted.
- valve gun having such a valve device.
- a pressure hose can be connected, via which the cleaning liquid of the valve device can be supplied, and to the valve outlet, for example, a spray lance can be connected, via which the cleaning liquid can be directed to an object to be cleaned.
- valve seat member and the closing body are often subject to a high load, since the pressure of the cleaning liquid can be more than 100 bar, in particular more than 150 bar.
- the cleaning liquid in many cases has a high temperature, for example, a temperature of more than 70 ° C.
- the closing body When transitioning from the open position into the closed position, the closing body abruptly exerts a high mechanical load on the valve seat.
- Object of the present invention is to develop a valve device of the type mentioned in such a way that it has an improved service life even when using highly heated and under high pressure cleaning fluid.
- valve seat member consists at least in a valve seat forming the valve seat of an alumina ceramic with a purity of at least 99.8% or from a dispersion ceramic based on alumina with dispersed zirconia.
- At least the valve seat region of the valve seat element forming the valve seat consists of an aluminum oxide ceramic which has a very high degree of purity, namely a degree of purity of at least 99.8%, or of a dispersion ceramic based on aluminum oxide with dispersed zirconium oxide. It has been shown that the use of such ceramic materials, the valve device can withstand the loads that occur when using a highly heated and highly pressurized cleaning liquid reliably over a long time without an additional, energy-absorbing elastic material must be used. When using an alumina ceramic, however, a purity of at least 99.8% is required.
- a dispersion ceramic based on aluminum oxide which is reinforced with zirconium oxide.
- Such dispersion ceramics are also referred to as ZTA ceramics, where the abbreviation ZTA stands for "Zirconia Toughened Aluminum Oxide".
- the ceramic materials used have a high hardness and a high impact strength and can therefore withstand the loads that occur when using the valve device in a high-pressure cleaning device, in particular in a valve gun of a high-pressure cleaning device for a long time.
- the closing body also consists of an alumina ceramic with a degree of purity of at least 99.8% or of a dispersion ceramic based on aluminum oxide with dispersed zirconium oxide, at least in a contact region lying against the valve seat in the closed position. This gives the valve device a particularly high load capacity.
- valve seat region of the valve seat element and / or the abutment region of the closing body lying in the closed position on the valve seat consist of the ceramics mentioned. It is advantageous, however, if the valve seat element and / or the closing body consist entirely of an alumina ceramic with a purity of at least 99.8% or of a dispersion ceramic based on alumina with dispersed zirconium oxide.
- valve seat member and / or the closing body can be produced in a sintering process from said ceramic materials.
- the valve seat element in the region of the valve seat is subjected to a post-processing in order to give the valve seat a high surface quality.
- the area of the valve seat can be ground or lapped, for example.
- valve seat element and the closing body consist of the same ceramic material.
- the valve seat member and the closing body either the same alumina ceramic with a purity of at least 99.8% or the same dispersion ceramic based on alumina with dispersed zirconia used.
- the proportion of zirconium oxide in the mentioned dispersion ceramic is favorably at most 25%.
- the valve seat member has a conical sealing surface which forms the valve seat.
- Such configured sealing surface can be produced inexpensively and in particular also cost-effective to improve the surface quality.
- the sealing surface is ground or lapped in order to improve the surface quality.
- the sealing surface preferably has a center roughness of not more than 1.0 ⁇ m, in particular a maximum average roughness value of 0.8 ⁇ m.
- Mean roughness is the arithmetic mean of deviations from a centerline.
- the closing body is advantageously spherical.
- the closing body assumes its closed position, then the cleaning liquid upstream of the closing body and of the valve seat frequently has a high pressure.
- the movement of the closing body from the closed position into the open position preferably takes place counter to the pressure of the cleaning fluid and also against the closing force exerted by the closing spring on the closing body.
- the valve seat element has one of the sealing surface in the flow direction of the cleaning liquid immediately upstream flow guide, which tapers in the flow direction of the cleaning liquid. The sealing surface forms the valve seat, against which the closing body rests in the closed position.
- the flow guide is conveniently designed conical.
- the opening angle of the conical flow guide surface is greater than the opening angle of the conical sealing surface.
- the opening angle is understood to be twice the angle between the surface lines and the center axis of the flow guide surface or the sealing surface.
- the opening angle of the conical sealing surface may be, for example, about 65 ° to 68 °.
- the opening angle of the conical flow guide can be, for example, at least 69 °.
- the valve seat member is designed in a preferred embodiment of the invention rotationally symmetrical to a central axis of the valve seat member.
- the rotationally symmetrical design of the valve seat element facilitates its manufacture.
- a sintering method can be used to produce the valve seat element.
- the valve seat element has a support surface facing away from the valve inlet, with which it rests against a diameter constriction of the passage channel assigned to the valve seat element. Which differs from the valve inlet to the valve outlet extending through channel thus has a diameter constriction at which the valve seat member is supported.
- valve seat element associated with the diameter constriction of the passage channel forms in an advantageous embodiment of the invention, a radially inwardly directed stage.
- valve seat element has a recess surrounding the support surface in the circumferential direction, in which a sealing element is arranged, for example a sealing ring.
- the recess may, for example, form a step change in the outer diameter of the valve seat element.
- the valve seat element may for example be designed as a hollow cylinder whose outer diameter is gradually reduced in the direction of the support surface, wherein the region is reduced with a reduced outer diameter of a sealing ring.
- the valve seat element has a passage opening, which adjoins the valve seat in the direction of flow of the cleaning fluid and extends coaxially to a central axis of the valve seat element, via which the cleaning fluid can flow to the valve outlet when the closing body assumes its open position. It is advantageous if the passage opening has an end portion facing away from the valve seat, which continuously widens in the flow direction of the cleaning fluid. As a result, it is possible to reduce the flow resistance of the valve seat element, and this in turn means that the load exerted on the valve seat element by the cleaning fluid can be reduced.
- the end portion may be configured conical, for example.
- the diameter of the through passage extending from the valve inlet to the valve outlet in the subsequent directly in the flow direction of the cleaning liquid to the valve seat member Range is larger than the largest diameter of the end portion of the through hole of the valve seat member.
- the passage opening of the valve seat element preferably forms the area with the smallest flow cross section through which the cleaning fluid flows on the way from the valve inlet to the valve outlet. This area can be kept very short so that the cleaning liquid is only subjected to relatively small flow losses when it flows through the valve device.
- a spring holder on which the closing spring is supported, is preferably defined in the through-channel.
- the spring holder is advantageously pressed into a receiving portion of the through-channel, wherein the valve seat member, the closing body and the closing spring are arranged in the receiving portion.
- the spring holder has in such a configuration on a press-fit, which forms an interference fit with the receiving portion of the passage, which ensures that the spring holder is held immovably and non-rotatably in the passage, so does not move unintentionally under the action of the force exerted by closing spring.
- the receiving portion of the passage channel is in a preferred embodiment of the invention rectilinear, cylindrical and continuous. This facilitates the production of the valve housing and the assembly of the valve seat member, the closing body and the closing spring and the pressing of the spring holder in the receiving portion.
- the through-channel has a diameter constriction associated with the spring holder, on which the spring holder is preferably supported with a support flange.
- the receiving portion of the through-channel can be assigned, for example, from the diameter constriction associated with the spring holder to the valve seat element associated with the valve seat element. Neten diameter constriction extend.
- the closing body and the closing spring can be inserted into the receiving portion, and after insertion of the closing body and the closing spring of the spring holder can be pressed with its press-in so far into the receiving section until it with its support flange on the spring holder associated diameter constriction of the passage channel to the plant arrives.
- the spring element occupies a predetermined distance to the valve seat member in this position, and this in turn has the consequence that the closing spring, which is supported on the spring holder, exerts a predetermined closing force on the closing body.
- the spring retainer associated diameter constriction of the passage channel is conveniently designed in the form of a radially inwardly directed stage.
- a force transmission element is arranged in an advantageous embodiment of the invention.
- the closing force exerted by the closing spring can be uniformly transmitted to the closing body, so that it rests tightly in the closed position on the valve seat, wherein the closing body is acted upon practically only coaxially to the flow direction of the cleaning liquid with a closing force and transverse to the flow direction aligned forces can be kept low.
- the power transmission element forms a guide for the closing body.
- the power transmission element is conveniently made of a non-ceramic material. It can be provided, for example, that the force transmission element is made of metal, in particular of brass or steel, or of a plastic material. Preferably, the force transmission element has a spring receiving section for receiving an end region of the closing spring facing the force transmission element and a closing body receiving section for receiving an end region of the closing body facing the force transmission element.
- the closing spring is favorably designed as a helical spring which surrounds the spring receiving section with its end region facing the force-transmitting element or dips into the spring receiving section.
- the closing body receiving portion preferably forms a depression, for example a pan-like depression into which the closing body dips.
- the spring holder has a longitudinal channel aligned in the flow direction of the cleaning liquid, which widens over an outwardly directed step, wherein the closing spring is supported on the step and wherein at least one bypass channel, based on the flow direction of the cleaning liquid upstream of the Stage, branches off from the longitudinal channel.
- the bypass channel allows the cleaning fluid to flow around the end portion of the closing spring arranged on the spring holder.
- the at least one bypass channel can be oblique or perpendicular to
- the at least one bypass channel is designed as a groove which is formed in the closing spring facing the end face of the spring holder.
- the closing spring can be supported on the end face of the spring holder, and via the groove formed in the end face, at least part of the cleaning liquid can flow around the outside of the closing spring on the end face.
- the closing spring facing the end surface of the spring holder has two cross-shaped grooves, each forming bypass channels.
- the invention also relates to a valve gun for a high-pressure cleaner with a valve device of the type described above.
- the valve gun has a mechanically coupled to the valve lifter trip lever which is pivotally mounted about a pivot axis.
- the release lever is pivotable back and forth between a rest position and a release position.
- Figure 1 a schematic sectional view of a valve gun
- FIG. 2 is an enlarged view of a valve device of the valve gun of Figure 1;
- FIG. 3 an enlarged view of detail A from FIG. 2; an enlarged sectional view of a valve seat member of the valve device of Figure 2.
- 1 shows an advantageous embodiment of a valve gun according to the invention is shown schematically and overall occupied by the reference numeral 10.
- the valve gun 10 includes a gun housing 12 which is formed in a conventional 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 portion 16 which is disposed between a front housing portion 18 and a rear housing portion 20.
- the front housing portion 18 accommodates an advantageous embodiment of a valve device 22 according to the invention.
- the valve device 22 has a valve housing 24 with a valve inlet 26 and a valve outlet 28. Via a passage 30, the valve inlet 26 is in flow communication with the valve outlet 28.
- the valve outlet 28 protrudes in the illustrated embodiment from a front side 32 of the gun housing 12.
- a liquid discharge line such as a spray lance
- the valve inlet 26 protrudes in the illustrated embodiment from a bottom 34 of the gun housing 12.
- a liquid supply line can be connected to the valve inlet 26.
- the pressure hose 36 has a hose nipple 38, which is inserted into the valve inlet 26 of the valve housing 24 and fixed by means of a union nut 40 on the valve housing 24.
- the union nut 40 is surrounded by a kink protection 42 in the illustrated embodiment.
- the through-channel 30 has a rectilinear first channel section 52, which adjoins the valve inlet 26 in the flow direction 54 of the cleaning liquid.
- the first channel section 52 has a first radially inwardly directed step 56, and in the flow direction 54 at a distance from the first step 56, the first channel section 52 has a second radially inwardly directed step 58.
- the first channel section 52 Downstream of the second stage 58, the first channel section 52 forms an end region 60.
- the end portion 60 is followed by a second channel portion 62 which is oriented at an angle to the first channel portion 52, that is, the longitudinal axis 64 of the second channel portion 62 is oriented at an angle to the longitudinal axis 66 of the first channel portion.
- the angle between the longitudinal axis 64 and the longitudinal axis 66 is more than 90 °, in particular about 115 °.
- a third channel section 68 of the through-channel 30 adjoins the second channel section 62.
- the third channel portion 68 extends from the second channel portion 62 to the valve outlet 28 of the valve housing 24.
- the longitudinal axis 70 of the third channel portion 68 is oriented at an angle to the longitudinal axis 64 of the second channel portion 62.
- the longitudinal axis 70 of the third channel section 68 is perpendicular to the longitudinal axis 66 of the first channel section 52.
- the valve housing 24 has a stepped plunger channel 72, which is aligned with the first channel portion 52 and connects to the end portion 60 of the first channel portion 52.
- the plunger channel 72 extends up to a valve inlet 26 facing away from the top 74 of the valve housing 24. Starting from the top 74, the plunger channel 72 an input portion 76, to which a via a stepped extension 78 in the end portion 60 of the first channel section 52 merges Output section 80 connects.
- the first channel portion 52 Approximately midway between the valve inlet 26 and the first stage 56, the first channel portion 52 has a conical throat 82 over which the diameter of the first channel portion 52 decreases.
- the hose nipple 38 is inserted into the region of the first channel portion between the valve inlet 26 and the first stage 56.
- the hose nipple 38 has an annular groove in which a sealing ring 86 is arranged, which seals the hose nipple 38 in a region downstream of the conical constriction 82 against the wall of the first channel section 52.
- the region of the first channel section 52 which extends from the first step 56 to the second step 58 is rectilinear, cylindrical and infinitely configured and forms a receiving region 88.
- a spring holder 90 is supported by a support flange 92 on the first step 56 and is pressed into the receiving region 88 with a press-in region 94 adjoining the support flange 92 in the flow direction 54.
- the first stage 56 forms a spring retainer 90 associated diameter restriction of the passage channel 30 from.
- the press-fit region 94 thus forms an interference fit together with the receiving region 88.
- the press-in area 94 is cylindrical.
- An insertion region 96 of the spring holder 90 adjoins the press-in region 94 in the flow direction 54.
- the outer diameter of the output region 96 is smaller than the outer diameter of the press-in region 94.
- the output region 96 extends to a second step 58 facing end face 98 of the spring holder 90.
- In the end face 98 are formed two mutually perpendicular grooves 100, 102 and a central Recess 104.
- the grooves 100, 102 have a greater depth than the central recess 104th
- the spring holder 90 In the longitudinal direction, ie in the flow direction 54, the spring holder 90 is penetrated by a longitudinal channel 106, from which the grooves 100, 102 branch off in the radial direction.
- a valve seat member 108 made of a ceramic material is supported, which is configured as a stepped hollow cylinder and forms a valve seat 110 facing the spring holder 90.
- the second stage 58 forms a valve seat element 108 associated with the diameter narrowing of the through-channel 30 from.
- the valve seat 110 is adjoined coaxially with the longitudinal axis 66 of the first channel section 52 by a passage opening 112 which extends through the valve seat element 108 in the longitudinal direction and widens conically in the direction of the end region 60 of the first channel section 52.
- the valve seat element 108 is designed rotationally symmetrical to a central axis 115. This becomes clear in particular from FIG.
- Valve seat member 108 in the illustrated embodiment is an alumina ceramic having a purity of at least 99.8%.
- the valve seat member 108 could also be comprised of a dispersed zirconia based alumina-based dispersion ceramic, i. from a ZTA material.
- the ceramic valve seat member 108 has an area of reduced outer diameter in the form of a collar 114 which is surrounded by a sealing ring 116 and which rests with a support surface 118 on the second step 58.
- a radially outwardly directed shoulder 120 adjoins the collar 114 against the flow direction 54 of the cleaning liquid, via which the outer diameter of the valve seat element 108 widens in stages.
- the valve seat 110 is formed by a conical sealing surface 111.
- the valve seat member 108 was made in a sintering process and the sealing surface 111 was post-processed so that it has a high surface finish.
- the sealing surface 111 was ground, it could for example also be lapped.
- the average roughness of the sealing surface 111 is a maximum of 1.0 pm, in particular a maximum of 0.8 pm.
- the sealing surface 111 is also preceded by a likewise conically configured flow guide surface 113.
- the flow guide surface 113 was not ground and also subjected to no further processing.
- the opening angle ß of the flow guide 113 is greater than the opening angle ⁇ of the sealing surface 111.
- the opening angle ⁇ is about 65 ° to 68 ° and the opening angle ß is at least about 69 °.
- a closing body 122 is arranged in the receiving region 88 of the passage channel 30, which is designed spherical in the illustrated embodiment.
- the closing body 122 is in the illustrated embodiment of the same alumina ceramic as the valve seat member 108 and was also prepared in a sintering process. Also for the
- Closing body 122 could alternatively be a dispersion ceramic based on alumina with dispersed zirconia used.
- the closing body 122 bears against the valve seat 110.
- a closing spring 124 By means of a closing spring 124, the closing body 122 is acted upon by a closing force, so that it is pressed against the valve seat 110.
- the closing spring 124 is formed in the illustrated embodiment as a helical spring. It is supported with its end facing away from the closing body 122 on the spring holder 90, wherein it dips into its central recess 104. With its closing body 122 facing the end region, the closing spring 124 surrounds a cylindrical spring receiving portion 126 of a force transmission element 128, via which the force exerted by the closing spring 124 closing force on the closing body 122 is transmitted.
- the force transmission element 128, facing the closing body 122 has a closing body receiving portion 130 in the form of a depression into which the closing body 122 with its end region facing away from the valve seat 110 dips.
- the plunger channel 72 is penetrated by a valve tappet 132 which extends up to the closing body 122 and protrudes with its free end 134 out of the upper side 74 of the valve housing 24.
- the valve tappet 132 is surrounded by a sealing ring 136 which is positioned between a support ring 138 bearing against the stepped extension 78 of the tappet channel 72 and a wiper ring 140 spaced from the support ring 138.
- the support ring 138 avoids gap extrusion of the seal ring 136, i. it ensures that the sealing ring 136 is not squeezed into the gap between the valve tappet 132 and the wall of the inlet section 76 of the tappet channel 72 under the action of very high liquid pressures.
- valve stem 132 can be moved colinearly to the longitudinal axis 66 of the first channel section 52, wherein its outer side is stripped off by the scraper ring 140 and thereby any lime deposits and other deposits of abrasive particles are eliminated.
- the wiper ring 140 and the sealing ring 136 are held in the output section 80 of the plunger channel 72.
- the valve stem 132 can be displaced by pivoting a release lever 144 in the direction of the valve inlet 26, so that the closing body 122 lifts against the closing force of the closing spring 124 from the valve seat 110 and thereby releases the flow connection between the valve inlet 26 and the valve outlet 28.
- the release lever 144 is disposed in the handle 44 and mounted about a pivot axis 146 pivotally mounted on the first housing shell 14 and the second housing shell, not shown in the drawing. It can be detected by the user with the palm of his hand from his figure shown in FIG. rest position in the direction of the front housing portion 18 are pivoted.
- the pivot axis 146 is arranged in the free end region 46 of the handle 44. In its rest position, the triggering lever 144 protrudes with an actuating surface 148 out of the back of the handle 44 facing away from the front housing region 18.
- the release lever 144 is acted upon by a first return spring 150 with a resilient restoring force. Under the action of the first return spring 150, the release lever 144 automatically assumes its rest position when the user releases the release lever 144.
- the release lever 144 is automatically locked by means of a first locking member 152.
- the first locking member 152 is configured substantially L-shaped and pivotally mounted in the handle 44.
- a first leg 154 of the first locking member 152 protrudes in the rest position of the trigger lever 144 from the front housing portion 18 facing front of the handle 44 out.
- a trigger arm 144 facing the second leg 156 of the first locking member 152 is in the rest position of the trigger lever 144 with its free end 158 on the trigger lever 144 and prevents it from pivoting movement.
- a second return spring 160 the first locking member 152 is pressed into its locking position shown in Figure 1.
- the first locking member 152 When the user grasps the handle 44 with his hand, he intuitively pivots the first locking member 152 counter to the spring force of the second return spring 160 into a position in which the second leg 156 can dip into a recess 162 of the release lever 144 and thereby the finger Release lever 144 from the first locking member 152 can be freely pivoted about the pivot axis 146. If the user releases the handle 44 again, the trigger lever 144 is automatically pivoted by the first return spring 150 into its rest position and the first locking member 152 is automatically pivoted by the second return spring 160 in the locking position in which it locks the release lever 144.
- a pivoting movement of the trigger lever 144 in the direction of the front housing portion 18 is transmitted to the valve tappet 132 via a coupling lever 164 arranged in the central housing portion 16.
- the coupling lever 164 is mounted in the illustrated embodiment, the valve housing 24 about a coupling axis 166 pivotally.
- the coupling axis 166 is aligned parallel to the pivot axis 146.
- the coupling lever 164 has an adjustable force-applying element 168 which bears against the free end of the valve tappet 132.
- the coupling lever 164 Spaced from each other on a first coupling roller 170 and a second coupling roller 172, the succession of pivoting of the trigger lever 144 in the direction of the front housing portion 18 successively each slide on a portion of a guide track 174 which a the coupling lever 164 facing end face 176 of the release lever 144 is formed.
- the release lever 144 is pivoted in the direction of the front housing portion 18, first the first coupling roller 170 slides along a rear end region of the guide track 174 and the coupling lever 164 is pivoted such that the force application element 168 moves the valve tappet 132 in the direction of the inlet 26 of the valve housing 24 shifts.
- the first coupling roller 170 lifts from the guide track 174 and the second coupling roller 172 slides along a front end portion of the guide track 174, so that the coupling lever 164 is further pivoted and thereby the valve tappet 132nd is further displaced in the direction of the inlet 26 until the closing body 122 reaches its open position.
- the coupling lever 164 can be locked by means of a second locking member 178.
- the second locking member 178 forms a displaceably mounted on the first housing shell 14 and on the second housing shell slide body 180, in its blocking position shown in Figure 1 with a coupling lever 164 facing the projection 182 on the first coupling roller 170 facing away from the top of the coupling lever 164 directly is present or arranged at a small distance to the top of the coupling lever 164.
- a pivotal movement of the coupling lever 164 and thus also a pivoting movement of the release lever 144 is thus reliably prevented by means of the sliding body 180 when the sliding body 180 assumes its blocking position shown in Figure 1.
- the sliding body 180 can be moved in the direction away from the front housing portion 18 toward the rear in a parking position, not shown in the drawing, so that the projection 182 releases the coupling lever 164 and this release lever 144 via the first coupling roller 170 and the second Coupling roller 172 can be pivoted.
- Both in the blocking position and in the parking position of the sliding body can be locked by means of suitable locking elements with the gun housing 12.
- valve assembly 22 and valve gun 10 Due to the use of a high purity alumina ceramic (at least 99.8%) or alternatively an alumina dispersed zirconia based dispersion ceramic for the valve seat member 108 and closing body 122, the valve assembly 22 and valve gun 10 have high load capacity and long life ,
- valve device 22 and the valve gun 10 are inexpensive to produce.
- the support ring 138 and the scraper ring 140 together with the sealing ring 136 via the valve inlet 26th and the first channel section 52 are inserted into the output section 80 of the plunger channel 72.
- the clamping disc 142 can be pressed via the valve inlet 26 and the first channel section 52 in the output section 80 of the plunger channel 72.
- the valve seat element 108 made of a ceramic material can be used together with the sealing ring 116 via the valve inlet 26 in the receiving area 88 until the end face 118 of the collar 114 rests against the second step 58 of the first channel section 52.
- valve stem 132 can be inserted from the top 74 of the valve housing 24 in the ram channel 72, wherein he passes through the support ring 138, the sealing ring 136, the wiper ring 140 and the clamping plate 142 and finally comes to the ceramic closure member 122 to the plant.
Landscapes
- Lift Valve (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2016/058422 WO2017178074A1 (en) | 2016-04-15 | 2016-04-15 | Valve device and valve gun for a high-pressure cleaning device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3442713A1 true EP3442713A1 (en) | 2019-02-20 |
EP3442713B1 EP3442713B1 (en) | 2020-08-05 |
Family
ID=55910925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16720368.6A Active EP3442713B1 (en) | 2016-04-15 | 2016-04-15 | Valve device and valve gun for a high-pressure cleaning device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3442713B1 (en) |
CN (1) | CN108883427A (en) |
DK (1) | DK3442713T3 (en) |
WO (1) | WO2017178074A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB513013A (en) * | 1938-03-29 | 1939-10-02 | Basil Marven | Improvements in or relating to hand-controlled nozzles for the delivery of fluids or powdered material |
DE8912046U1 (en) | 1989-10-10 | 1989-11-30 | Fink, Anton, Ing., Wels, At | |
CN201249145Y (en) * | 2008-08-15 | 2009-06-03 | 钛升科技股份有限公司 | Pulse valve for plastic injection device |
CN101695688B (en) * | 2009-09-30 | 2011-05-04 | 无锡威孚力达催化净化器有限责任公司 | Liquid swirl nozzle |
DE102011056094B4 (en) * | 2011-12-06 | 2014-05-28 | Dionex Softron Gmbh | Switching valve, in particular for switching a high-pressure fluid |
DK3079833T3 (en) * | 2013-12-12 | 2018-12-17 | Kaercher Alfred Se & Co Kg | Valve gun for a high pressure cleaner |
-
2016
- 2016-04-15 WO PCT/EP2016/058422 patent/WO2017178074A1/en active Application Filing
- 2016-04-15 EP EP16720368.6A patent/EP3442713B1/en active Active
- 2016-04-15 DK DK16720368.6T patent/DK3442713T3/en active
- 2016-04-15 CN CN201680084090.4A patent/CN108883427A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN108883427A (en) | 2018-11-23 |
WO2017178074A1 (en) | 2017-10-19 |
DK3442713T3 (en) | 2020-09-21 |
EP3442713B1 (en) | 2020-08-05 |
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