EP3939705A1 - Appareil de nettoyage haute pression - Google Patents

Appareil de nettoyage haute pression Download PDF

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Publication number
EP3939705A1
EP3939705A1 EP20185778.6A EP20185778A EP3939705A1 EP 3939705 A1 EP3939705 A1 EP 3939705A1 EP 20185778 A EP20185778 A EP 20185778A EP 3939705 A1 EP3939705 A1 EP 3939705A1
Authority
EP
European Patent Office
Prior art keywords
cleaning device
switching
pressure
pressure cleaning
delivery
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.)
Pending
Application number
EP20185778.6A
Other languages
German (de)
English (en)
Inventor
Fabian Emanuel Broghammer
Christopher Tost
Richard Fresow
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.)
Andreas Stihl AG and Co KG
Original Assignee
Andreas Stihl AG 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 Andreas Stihl AG and Co KG filed Critical Andreas Stihl AG and Co KG
Priority to EP20185778.6A priority Critical patent/EP3939705A1/fr
Priority to US17/371,339 priority patent/US20220016654A1/en
Priority to CN202110794805.8A priority patent/CN113926602A/zh
Publication of EP3939705A1 publication Critical patent/EP3939705A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0423—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material for supplying liquid or other fluent material to several spraying apparatus
    • 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
    • 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
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
    • B05B1/1627—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock
    • B05B1/1636—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock by relative rotative movement of the valve elements
    • 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
    • B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
    • B05B12/04—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for sequential operation or multiple outlets
    • 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
    • B05B15/70—Arrangements for moving spray heads automatically to or from the working position
    • B05B15/72—Arrangements for moving spray heads automatically to or from the working position using hydraulic or pneumatic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
    • 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
    • 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
    • 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
    • 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
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • 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
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0258—Multiple lance high pressure cleaning station
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/027—Pump details

Definitions

  • the invention relates to a high-pressure cleaning device according to the preamble of claim 1.
  • the EP 2 663 404 B1 shows a high-pressure cleaning device with a manually rotatable switching element. By turning the switching element, different nozzles can be selected for the operation of the high-pressure cleaning device. To do this, the lance of the high-pressure cleaning device must be taken in both hands and the switching element must be twisted relative to a base body of the lance.
  • the invention is based on the object of further developing a generic high-pressure cleaning device in such a way that the switching element can be adjusted easily and conveniently.
  • the invention provides that the high-pressure cleaning device is designed in such a way that the actuator can adjust the switching element between the first switching state and the second switching state due to a force exerted on the actuator by the cleaning liquid. This allows the switching element to be easily adjusted. A user of the high-pressure cleaning device does not have to use any of his own strength for this purpose.
  • the switching element can automatically using the pressure of the cleaning liquid take place. The fact that the pressure of the cleaning liquid or the cleaning liquid itself is used to adjust the switching element results in a simple construction of the high-pressure cleaning device. No additional motors or pressure circuits are required.
  • the high-pressure cleaning device advantageously comprises at least a first and a second working element.
  • the first working element In the first switching state of the switching element, the first working element is expediently switched into the conveying line, and in the second switching state of the switching element, the second working element is switched into the conveying line.
  • the switching element By adjusting the switching element, different working elements can be switched into the conveying line in a simple manner.
  • the first working element and the second working element are nozzles. This enables a comfortable nozzle change to be made possible. Depending on the selection of the individual nozzles, a pressure adjustment or pressure change is possible without changing the volume flow in the delivery line. Even if the pressure is reduced, you can work with the full flushing capacity.
  • the high-pressure cleaning device expediently comprises a delivery actuation element with which the passage of cleaning fluid through the delivery line is permitted when the delivery actuation element is in an open position and is prevented in a closed position of the delivery actuation element.
  • the feed actuating element is arranged between the feed pump and the spray opening in the feed line.
  • the high-pressure cleaning device comprises a branch line, which connects the delivery line to the actuator at a branch point of the delivery line.
  • a switching actuation element is expediently provided between the junction point and the actuator, with which the passage of cleaning fluid through the branch line is permitted in an open position of the switching actuation element and prevented in a blocking position of the switching actuation element.
  • the pressure of the cleaning liquid can be applied to the actuator or not.
  • the switch operating element divides the branch line into a holding section extending from the branch point to the switch operating element and into a pressure section extending from the switch operating element to the actuator.
  • the high-pressure cleaning device is designed such that during operation of the high-pressure cleaner there is a holding pressure in the holding section of the branch line when the switching actuation element is in the blocking position and the conveying actuation element is in the closed position.
  • the high-pressure cleaning device is expediently designed in such a way that the holding pressure can be increased by the delivery pump when the switching actuation element is in the blocked position and the delivery actuation element is in the closed position.
  • the holding pressure can be so great that it is at least great enough to exert the force on the actuator to adjust the switching element.
  • the pressure of the cleaning liquid can be used to adjust the switching element in a simple manner.
  • the branching point of the delivery line between the delivery pump and the delivery actuating element is advantageously arranged in the delivery line.
  • the feed actuation element can be closed and then a sufficiently large holding pressure can be built up by means of the feed pump.
  • the delivery actuation element is expediently arranged between the delivery pump and the switching element arranged in the delivery line.
  • the high-pressure cleaning device can be designed so that the switching element in the closed position of the feed actuating element no longer with pressure through the feed pump and the Cleaning liquid is applied. An adjustment of the switching element between the first switching state and the second switching state is then possible in a simple manner.
  • a delivery non-return valve is arranged in the delivery line between the branch point of the delivery line and the delivery pump.
  • the delivery non-return valve prevents a flow of cleaning liquid against the delivery direction. This allows a sufficiently large holding pressure to build up in the branch line.
  • the high-pressure cleaning device is designed in such a way that during operation of the high-pressure cleaning device, when the switching actuation element is switched from the blocking position to the open position, if there is sufficient holding pressure in the holding section of the branch line, the cleaning liquid penetrates from the holding section into the pressure section of the branch line and exerts the force on the actuator to adjust the switching element between the first switching state and the second switching state.
  • another nozzle can be switched into the delivery line.
  • the high-pressure cleaning device includes a drainage return channel.
  • the return drainage channel expediently connects the pressure section of the branch line to an element section of the delivery line that extends from the delivery actuating element to the spray opening.
  • the high-pressure cleaning device is designed such that the drainage return channel is interrupted in the open position of the switching actuation element and in the blocking position of the switching actuation element a flow of cleaning liquid is only possible in the direction from the pressure section to the element section.
  • a pressure reduction in the pressure section of the branch line is possible.
  • cleaning fluid flows from the pressure section to the element section of the delivery line.
  • the pressure on the actuator decreases.
  • the high-pressure cleaning device is expediently designed in such a way that a drainage non-return valve is switched into the drainage return channel when the switching actuation element is in the blocking position.
  • the drainage check valve is part of the switching actuation element.
  • the drainage non-return valve is advantageously removed from the drainage return channel in the open position of the switching actuation element due to the adjustment of the switching actuation element.
  • the arrangement of the drainage check valve in the drainage return channel is coupled in a simple manner to the position of the switching actuation element.
  • the switching actuation element is operatively connected to a first restoring spring in such a way that a force is applied to it in the direction of its blocking position. This ensures that the shift actuation element returns to the blocked position if it is not actuated by a user.
  • the conveying actuation element is operatively connected to a second restoring spring in such a way that a force is applied to it in the direction of its closed position.
  • the actuator expediently has a rest position and an adjustment position, with the actuator having to be moved from the rest position into the adjustment position in order to adjust the switching element.
  • the actuator is operatively connected to a third restoring spring in such a way that a force is applied to it in the direction of the rest position.
  • the actuator is advantageously guided in a cylinder of a hydraulic cylinder. As a result, the actuator can be manufactured in a simple manner.
  • the high-pressure cleaning device is designed in such a way that the actuator can also adjust the switching element as a result of a force exerted on the actuator by the operator of the high-pressure cleaning device.
  • the high-pressure cleaning device 1 has a delivery line 10 .
  • the delivery line 10 connects a delivery pump 2 to a spray opening 19.
  • the delivery pump 2 delivers cleaning liquid from the delivery pump 2 through the cleaning line 10 to the spray opening 19.
  • the delivery pump 2 delivers cleaning liquid from a liquid container 36 through a filter 37 to the spray opening 19.
  • the Spray opening 19 is the end of the delivery line 10.
  • the cleaning liquid emerges from the spray opening 19 under high pressure.
  • the feed pump 2 feeds cleaning liquid in a feed direction 50 in the feed line 10.
  • the high-pressure cleaning device 1 has a delivery actuation element 11 .
  • the feed actuating element 11 is arranged between the feed pump 2 and the spray opening 19 . With the conveying actuation element 11 the passage of cleaning liquid through the conveying line 10 can be permitted or prevented.
  • an open position 12 ( 1 ) of the delivery actuation element 11 it is possible to deliver cleaning liquid from the delivery pump 2 to the spray opening 19 .
  • a closed position 13 ( 4 ) of the delivery actuation element 11 is prevented from delivering cleaning liquid from the delivery pump 2 to the spray opening 19 .
  • the high-pressure cleaning device 1 includes a second return spring 17.
  • the delivery actuating element 11 is connected to the second return spring 17 in such a way Active connection that it is applied towards its closed position 13 with a force.
  • the conveyor operating element 11 is designed as a switch that can be operated by a user with one hand.
  • the high-pressure cleaning device 1 has a high-pressure gun 44 .
  • the high-pressure gun 44 comprises a handle 42 and a lance 43.
  • the delivery actuation element 11 is arranged on the handle 42.
  • the lance 43 extends in a longitudinal direction 49.
  • the high-pressure gun 44 has a longitudinal end 45 in the longitudinal direction 49.
  • the longitudinal end 45 faces away from the spray opening 19 .
  • the spray opening 19 is arranged at one end of the high-pressure gun 44 and the longitudinal end 45 is arranged at the other end.
  • the high-pressure gun 44 has a longitudinal section 46.
  • the longitudinal section 46 extends in the longitudinal direction 49 starting from the longitudinal end 45.
  • the high-pressure gun 44 has a length d measured in the longitudinal direction 49.
  • the longitudinal section 46 extends over a quarter of the length d of the high-pressure gun 44.
  • the feed actuating element 11 is arranged in the longitudinal section 46.
  • the high-pressure cleaning device 1 has a switching element 3 .
  • the switching element 3 has at least a first switching state and a second switching state.
  • the high-pressure cleaning device 1 comprises at least a first working element 4 and a second working element 5.
  • the first working element 4 is connected to the delivery line ( 1 , 3 and 4 ) and in the second switching state, the second working element 5 is connected to the delivery line 10 ( Figures 5 to 8 ).
  • the first working element 4 is connected into the conveying line 10 in the first switching state, and only the second is in the second switching state
  • the first working element 4 and the second working element 5 are nozzles.
  • the switching element is a simple switch and no working elements are provided that are switched into the conveying line.
  • a third nozzle 47 is switched into the delivery line 10 in a third switching state.
  • the high-pressure cleaning device 1 comprises at least three working elements 4, 5 and 47 designed as nozzles.
  • the delivery line 10 branches in the area between the switching element 3 and the spray opening 19.
  • a first branch 33 opens at the spray opening 19 into the first working element 4 designed as a nozzle.
  • a second branch 34 opens at the spray opening 19 into the nozzle trained second working element 5.
  • the number of branches corresponds to the number of switching states of the switching element 3.
  • the high-pressure cleaning device 1 comprises a third nozzle 47 ( 1 ).
  • the branches 33 and 34 are arranged in a base body 29 of the lance 43 of the high-pressure cleaning device 1 .
  • the branches 33 and 34 are channels in the main body 29.
  • the switching element 3 is rotatably mounted about an axis of rotation 48 ( 2 ).
  • the axis of rotation 48 extends in the longitudinal direction 49.
  • the switching element 3 has a switching channel 27 on.
  • the switching channel 27 has an orifice 28.
  • the orifice 28 faces the spray opening 19.
  • the mouth 28 is arranged eccentrically with respect to the axis of rotation 48 .
  • the mouth 28 is arranged at a distance from the axis of rotation 48 .
  • the switching channel 27 opens with the mouth 28 in the first branch 33 of the branch line 20.
  • the switching channel 27 opens with its mouth 28 in the second branch 34 of the branch line 20.
  • the switching element 3 In the first switching state and in the second switching state, the switching element 3 in Pressed towards the spray opening 19 against the base body 29.
  • a spring not shown, is provided for this purpose.
  • a sealing ring is arranged between the switching element 3 and the base body 29 . Because the switching element 3 is pressed against the base body 29, the connection between the switching channel 27 and the branches 33, 34 is sufficiently sealed for the cleaning fluid to pass through.
  • the switching element 3 When switching over the switching element 3 from the first switching state to the second switching state, the switching element 3 by the in 2 axis of rotation 48 shown rotated.
  • the switching element 3 When switching from the first switching state to the second switching state, the switching element 3 is first moved away from the spray opening 19 in the direction opposite to the longitudinal direction 49 before rotating about the axis of rotation 48 . This is possible because no pressure is exerted on the switching element 3 by the cleaning liquid when the delivery-actuating element 11 is in the closed position 13 .
  • the high-pressure cleaning device 1 is designed in such a way that the switching element 3 can be moved relative to the base body 29 in the closed position 13 of the delivery actuation element 11 in the direction away from the spray opening 19 .
  • the high-pressure cleaning device is designed in such a way that, after the switching element 3 has been adjusted between the first and the second switching state, the switching element 3 is again pressed against the base body 29 in the direction of the spray opening 19 .
  • the first branch 33 leads to the first working element 4.
  • the second branch 34 leads to the second working element 5.
  • the first branch 33 is part of the delivery line 10 in the first switching state of the switching element 3.
  • the second branch 34 is not part of the delivery line 10.
  • the second branch 34 is part of the delivery line 10 and the first branch 33 not.
  • the switching element 3 is also referred to as a nozzle diverter.
  • the switching element 3 is arranged in the delivery line 10 .
  • the working elements are part of the switching element.
  • the working elements are moved together with the switching element.
  • the working elements can then be moved together with the switching element and thus switched into the conveying line.
  • the high-pressure cleaning device 1 has an actuator 6 .
  • the actuator 6 is used to adjust the switching element 3 between the first and the second switching state.
  • the high-pressure cleaning device 1 is designed in such a way that the actuator 6 can adjust the switching element 3 between the first switching state and the second switching state as a result of a force exerted on the actuator by the cleaning liquid.
  • the actuator 6 acts on the switching element 3.
  • the actuator 6 is guided in a cylinder 41 of a hydraulic cylinder 40.
  • the actuator 6 includes the piston and the piston rod of the hydraulic cylinder 40.
  • the actuator 6 is part of the hydraulic cylinder 40.
  • the actuator 6 can move in the hydraulic cylinder 40 between a rest position 7 ( 1 ) and an adjustment position 8 ( figure 5 ) to move back and fourth.
  • the actuator 6 is operatively connected to a third restoring spring 9 in such a way that a force is applied to it in the direction of the rest position 7 .
  • the third return spring 9 is arranged between the piston of the actuator 6 and the cylinder 41 .
  • the actuator 6 To adjust the switching element 3, the actuator 6 must be moved from the rest position 7 to the adjustment position 8.
  • the piston of the actuator 6 delimits a pressure chamber 32 with part of the cylinder 41 of the hydraulic cylinder 40.
  • the volume of the pressure chamber 32 is minimal when the actuator 6 is in the rest position 7.
  • the pressure chamber 32 is connected to the delivery line 10 via a branch line 20 .
  • the delivery line 10 has a branch point 14.
  • the branch line 20 connects the branch point 14 to the actuator 6.
  • the branch line 20 fluidically connects the pressure chamber 32 to the feed line 10.
  • the actuator 6 is arranged at the end of the branch line 20.
  • the junction point 14 is arranged between the feed pump 2 and the feed actuating element 11 in the feed line 10 .
  • a switching actuation element 21 is provided between the junction point 14 and the actuator 6 .
  • a passage through the branch line 20 can be opened and closed with the switch operating member 21 .
  • the passage of cleaning liquid through the branch line 20 is in an open position 22 ( figure 5 ) of the shift actuation element 21 and in a blocking position 23 ( 1 , 3 , 4 , Figures 6 to 8 ) of the shift operating element 21 is prevented.
  • the cleaning liquid can pass through the passage at the shift actuation element 21 .
  • the blocking position 23 the cleaning liquid cannot flow through the passage.
  • the high-pressure cleaning device 1 comprises a first restoring spring 26.
  • the switching actuation element 21 is operatively connected to the first restoring spring 26 in such a way that a force is applied to it in the direction of its blocking position 23. If the switching actuation element 21 is not held in the open position 22, it returns to its blocking position 23 due to the force of the second return spring 26.
  • the switching actuation element 21 is arranged between the branch point 14 and the actuator 6 in the branch line 20 . As in 2 shown is that Switch actuating element 21 is arranged in the longitudinal section 46 of the high-pressure gun 44 . When the handle 42 is gripped, the switching actuation element 21 can be operated with the same hand with which the handle 42 is gripped.
  • the shift actuation element 21 divides the branch line 20 into a holding section 24 extending from the junction point 14 to the shift actuation element 21 and into a pressure section 25 ( 1 ).
  • the pressure section 25 extends between the switching actuation element 21 and the pressure chamber 32.
  • the holding section 24 extends between the junction point 14 and the switching actuation element 21.
  • a throttle element 38 is arranged in the branch line 20 .
  • the throttle element 38 is arranged in the pressure section 25 of the branch line 20 .
  • the high-pressure cleaning device 1 comprises a drainage return channel 30.
  • the delivery line 10 comprises an element section 16 and a pump section 18.
  • the pump section 18 extends between the delivery pump 2 and the delivery actuating element 11.
  • the element section 16 extends between the delivery actuating element 11 and the spray opening 19.
  • the drainage return channel 30 connects the pressure section 25 of the branch line 20 to the element section 16 of the delivery line 10.
  • the drainage return channel 30 opens into the delivery line 10 at a drainage point 35 of the delivery line 10.
  • the drainage point 35 is arranged between the delivery actuating element 11 and the switching element 3 in the delivery line 10.
  • the high-pressure cleaning device 1 comprises a drainage non-return valve 31.
  • the drainage non-return valve 31 is arranged in the blocking position 23 of the switching actuation element 21 in the drainage return channel 30.
  • the drain check valve 31 allows a flow of cleaning liquid from the pressure portion 25 of the branch line 20 toward the element portion 16 of the feed line 10 .
  • the Drainage non-return valve 31 prevents a flow of cleaning liquid in the direction from the drainage point 35 to the pressure section 25 through the drainage return channel 30.
  • the high-pressure cleaning device 1 includes a delivery check valve 15.
  • the delivery check valve 15 is arranged in the pump section 18 of the delivery line 10.
  • the delivery check valve 15 is arranged between the delivery pump 2 and the delivery actuating element 11 in the delivery line 10 .
  • the delivery check valve 15 is arranged between the branch point 14 and the delivery pump 2 .
  • the delivery check valve 15 prevents a flow of cleaning liquid against the delivery direction 50.
  • the delivery check valve 15 allows a flow of cleaning liquid in the delivery direction 50.
  • the Figures 3 to 8 show the high-pressure cleaning device 1 in different operating states.
  • high-pressure cleaning liquid is marked with thicker solid lines.
  • Cleaning liquid under low pressure is marked with a dashed line.
  • the delivery actuation element 11 is in the open position 12.
  • the switching actuation element 21 is in the blocking position 23.
  • the delivery pump 2 delivers cleaning liquid from the liquid container 36 through the delivery line 10 to the spray opening 19. Cleaning liquid sprays out of the spray opening 19 at high pressure.
  • the cleaning liquid in the delivery line 10 is under high pressure.
  • the cleaning liquid in the holding portion 24 of the branch line 20 is under high pressure.
  • the cleaning liquid in the section of the return drainage channel 30 between the switching actuation element 21 and the drainage point 35 is under high pressure.
  • the switching element 3 is in the first switching state. In the first switching state of the switching element 3, the switching element conducts 3 the cleaning liquid to the first working element 4.
  • the first working element 4 is connected to the conveying line 10.
  • the actuator 6 is in the rest position 7.
  • the conveyor actuating element 11 is no longer held in the open position 12.
  • the second return spring 17 has pressed the conveying actuation element 11 into the closed position 13 .
  • the delivery actuation element 11 is in the closed position 13.
  • the switching actuation element 21 is still in the blocking position 23. No cleaning liquid sprays out of the spray opening 19.
  • the cleaning liquid in the pump section 18 and in the holding section 24 is under high pressure.
  • the high-pressure cleaning device 1 is designed such that a holding pressure is present in the holding section 24 of the branch line 20 during operation of the high-pressure cleaning device 1 in the blocking position 23 of the switching activation element 21 in the closed position 13 of the delivery activation element 11 . in 4 In the state shown, the holding pressure corresponds to the high pressure of the high-pressure cleaning device.
  • the high-pressure cleaning device is designed in such a way that the holding pressure in the blocking position 23 of the switching actuation element 21 in the closed position 13 of the feed actuation element 11 can be increased by the feed pump. This may be necessary, for example, if the holding pressure has dropped due to repeated actuation of the actuator 6 by actuation of the shift actuation element 21 .
  • the switching actuation element 21 is in its blocking position 23, and no pressure is exerted on the actuator 6.
  • the actuator 6 is in its rest position 7.
  • the switching element 3 is still in its first switching state. the inside 2
  • the illustrated switching channel 27 of the switching element 3 leads to the first branch 33 of the delivery line 10 and the first working element 4 (this situation is in 2 not shown).
  • the pressure of the cleaning liquid prevailing in the holding section 24 is at least high enough to exert the force on the actuator 6 to adjust the switching element 3 . However, this only happens as soon as the switching actuation element 21 is moved from the blocking position 23 to the open position 22 .
  • figure 5 shows the high-pressure cleaning device 1 with the conveying actuating element 11 in the closed position 13 and the switching actuating element 21 in the open position 22.
  • the high-pressure cleaning device 1 is designed such that during operation of the high-pressure cleaning device 1 when switching the switching actuating element 21 from the blocking position 23 ( 4 ) to the open position 22 ( figure 5 ), when there is sufficient holding pressure in the holding section 24 of the branch line 20, the cleaning liquid penetrates from the holding section 24 into the pressure section 25 of the branch line 20 and exerts the force on the actuator 6 to adjust the switching element 3.
  • this causes another working element 4, 5, 47 to be switched into the conveying line 10.
  • the actuator 6 acts on the switching element 3 by a force which causes the second working element 5 to be switched into the conveying line 10 instead of the first working element 4 .
  • the actuator 6 is moved from its rest position 7 into its adjustment position 8 . This is done with the help of the power of the cleaning liquid.
  • the holding pressure of the cleaning liquid is now also applied to the actuator 6 and pushes the actuator 6 in the direction of its adjustment position 8.
  • the volume of the pressure chamber 32 of the hydraulic cylinder 40 is increased in the process.
  • the switching element 3 is adjusted by a rotary movement around the in 2 axis of rotation 48 shown. This rotary motion can be implemented, for example, by a rotary displacement link known from a ballpoint pen.
  • the high-pressure cleaning device 1 is designed in such a way that the switching element 3 is possible between the first switching state and the second switching state due to a force caused by the cleaning liquid or due to a force caused by the user.
  • the user can switch over the switching element 3 either by operating the switching operating element 21 or by manually operating the switching element 3 without using the pressure of the cleaning liquid.
  • the high-pressure cleaning device 1 is designed such that when the switch-actuating element 21 is in the open position 22, there is a fluidic connection between the holding section 24 and the pressure section 25 of the branch line 20 is produced and at the same time the drainage return channel 30 is fluidically interrupted in such a way that a flow of cleaning liquid from the pressure section 25 towards the element section 16 is prevented.
  • the 6 and 7 show the high-pressure cleaning device 1 with the conveying actuating element 11 in the closed position 13 and the switching actuating element 21 in the blocking position 23.
  • the actuator 6 is still in its adjustment position 8, and in 7 it is already back in its rest position 7. So that the actuator 6 can return to its rest position 7, the holding pressure of the cleaning liquid present in the pressure section 25 of the branch line 20 must be reduced.
  • the high-pressure cleaning device 1 is designed in such a way that when the switching actuation element 21 is in its blocking position 23, the drainage non-return valve 31 is switched into the drainage return channel 30 at the same time, and as a result the pressure section 25 in the direction from the pressure section 25 towards the element section 16 is fluidly connected to the Element section 16 is connected.
  • Cleaning liquid can flow from the pressure section 25 through the return drainage channel 30 into the element section 16 .
  • a flow of cleaning liquid in the direction from the element section 16 towards the pressure section 25 is prevented by the drainage check valve 31 .
  • This is also in 3 shown, in which the conveying actuating element 11 is in the open position 12 and at the same time the switching actuating element 21 is in the blocking position 23 .
  • the high-pressure cleaning device is designed in such a way that the drainage return channel is 30 in the open position 22 of the switching actuation element 21 is interrupted and in the blocking position 23 of the switching actuation element 21 a flow of cleaning liquid is only possible in the direction from the pressure section 25 to the element section 16 .
  • the high-pressure cleaning device 1 is designed in such a way that the drainage non-return valve 31 of the switching actuation element 21 is switched into the drainage return channel when the switching actuation element 21 is in the blocking position 23 .
  • the drainage check valve 31 is in the embodiment according to Figures 1 to 8 Part of the switching actuation element 21.
  • the high-pressure cleaning device 1 is designed in such a way that the drainage check valve 31 is removed from the drainage return channel 30 in the open position 22 of the switching actuation element 21 due to the adjustment of the switching actuation element 21 from the blocking position 23 to the open position 22. In the open position 22 of the switch-actuating element 21, the interruption element 39 is switched into the return drainage channel 31 due to the displacement of the switch-actuating element 21 ( figure 5 ).
  • connection between the pressure section 25 and the element section 16 is fluidically interrupted. If the delivery actuation element 11 is in the closed position 13, the switching actuation element 21 is in the blocking position 23 and at the same time the actuator 6 is in the adjustment position 8, cleaning fluid can flow from the pressure section 25 through the drainage return channel 30 and the drainage check valve 31 to the element section 16 of the delivery line 10 flow ( 6 ). As in 6 indicated by the dashed line, this cleaning liquid is under low pressure. The low pressure is lower than the high pressure, but higher than the low or hardly any pressure of the cleaning liquid. The cleaning fluid flowing off in this way through the return drainage channel can advance to the spray opening 19 and exit there. This can happen drop by drop. As a result, the holding pressure in the pressure section 25 is released.
  • the pressure in the pressure chamber 32 of the hydraulic cylinder 40 also decreases.
  • the pressure generated by the third return spring 19 on the actuator 6 is then greater than the holding pressure.
  • the third return spring 9 can then press the actuator 6 from the adjustment position 8 into the rest position 7 . This happens when transitioning from 6 to 7 .
  • the high-pressure cleaning device 1 is designed in such a way that the switching actuation element 21 can be pressed as often as desired in order to adjust the switching element 3 .
  • the pressure of the cleaning liquid present in the holding section 24 is always sufficient to move the actuator 6 from its rest position 7 into its adjustment position 8 .
  • the switching actuation element 21 automatically returns from the open position 22 to the blocking position 23 . This happens due to the restoring force of the first restoring spring 26.
  • the second working element 5 is now in the delivery line 10.
  • the switch-actuating element 21 is in its blocking position 23, and the delivery-actuating element 11 is in its open position 12.
  • the delivery pump 2 delivers cleaning liquid from the liquid container 36 through the delivery line 10 to the spray opening 19. Cleaning liquid 19 sprays out of the spray opening 19 under high pressure.
  • the high-pressure cleaning device 1 is in the same state as in 3 .
  • a further, different working element can be switched into the conveying line 10 by actuating the switching actuating element 21 again.
  • the high-pressure cleaning device is designed in such a way that the actuator can also adjust the switching element 3 as a result of a force exerted on the actuator 6 by the operator of the high-pressure cleaning device 1 .
  • the working elements are nozzles. However, it can also be provided to switch other working elements into the conveying line 10 with the switching element 3 .
  • the switching element 3 can be used to switch working elements into the delivery line 10, which enable the direction of rotation of a hydraulic motor to be switched.
  • a working element comprises a feed line and a return line to a circuit of a hydraulic motor.
  • the circuit is part of the delivery line.
  • the working element divides the element section into a first section between the delivery actuating element 11 and the working element and into a second section between the working element and the spray opening 19.
  • the circuit of the hydraulic motor has an inlet and an outlet.
  • a first working element connects the first portion of element section 16 to the inlet of the circuit and the outlet of the circuit to the second section of element section 16.
  • a second working element connects the first section of element section 16 to the outlet of the circuit and the inlet of the circuit to the second section of the element section 16.
  • the switching element 3 can also be used to switch an additional nozzle on or off.
  • a corner nozzle of a surface cleaner can be switched on and off.
  • two lines would have to be provided in the second section of the element section 16 .
  • both lines would be flooded and at Circuit of a second working element in the delivery line 10 only one line. This one line could be the line for the surface cleaner, for example.
  • a similar configuration can also be used to divert part of the volume flow. Provision can also be made here for arranging the working elements at the spray opening 19 instead of in the delivery line 10 at the end of the delivery line. Two lines can then be arranged downstream of the working elements, of which both or only one are flooded, depending on the working element used. If both lines are flooded, part of the volume flow can be diverted. Cleaning liquid can then escape from the branch line and the pressure can thus be reduced.
  • the switching element according to the invention can also be used to switch between two injector nozzles for admixing different cleaning agents.
  • the first and the second switching state can also be different gears of a transmission.
  • different working elements are not switched into the conveying line, but the switching element is actuated independently of the conveying line.
  • the actuator can then change the position of a gear wheel, for example.
  • Such a mechanical intervention in a transmission allows the transmission ratios to be changed in a targeted manner without having to accept disadvantageous losses.
  • Such an effect of the actuator on a gear can also be used to switch the direction of rotation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP20185778.6A 2020-07-14 2020-07-14 Appareil de nettoyage haute pression Pending EP3939705A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20185778.6A EP3939705A1 (fr) 2020-07-14 2020-07-14 Appareil de nettoyage haute pression
US17/371,339 US20220016654A1 (en) 2020-07-14 2021-07-09 High-Pressure Cleaning Device
CN202110794805.8A CN113926602A (zh) 2020-07-14 2021-07-14 高压清洁器具

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20185778.6A EP3939705A1 (fr) 2020-07-14 2020-07-14 Appareil de nettoyage haute pression

Publications (1)

Publication Number Publication Date
EP3939705A1 true EP3939705A1 (fr) 2022-01-19

Family

ID=71620188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20185778.6A Pending EP3939705A1 (fr) 2020-07-14 2020-07-14 Appareil de nettoyage haute pression

Country Status (3)

Country Link
US (1) US20220016654A1 (fr)
EP (1) EP3939705A1 (fr)
CN (1) CN113926602A (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005783B (de) * 1954-09-16 1957-04-04 Hugo Tafelmaier Strahlrohr fuer Spritzen zum Bespritzen von Baeumen, Straeuchern od. dgl. sowie fuer industrielle Zwecke
US5785067A (en) * 1996-10-15 1998-07-28 Ez Environmental Solutions Corporation Pressure washing apparatus with ozonation
US5794854A (en) * 1996-04-18 1998-08-18 Jetec Company Apparatus for generating oscillating fluid jets
US20170072413A1 (en) * 2014-03-05 2017-03-16 Krautzberger Gmbh Extension device for spraying devices and spraying device
EP2663404B1 (fr) 2011-01-14 2017-06-07 Alfred Kärcher GmbH & Co. KG Ensemble buse réversible
WO2019086158A1 (fr) * 2017-11-06 2019-05-09 Wabco Gmbh Dispositif de nettoyage, système d'air comprimé, procédé de nettoyage
WO2019206511A1 (fr) * 2018-04-25 2019-10-31 Alfred Kärcher SE & Co. KG Dispositif de pulvérisation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005783B (de) * 1954-09-16 1957-04-04 Hugo Tafelmaier Strahlrohr fuer Spritzen zum Bespritzen von Baeumen, Straeuchern od. dgl. sowie fuer industrielle Zwecke
US5794854A (en) * 1996-04-18 1998-08-18 Jetec Company Apparatus for generating oscillating fluid jets
US5785067A (en) * 1996-10-15 1998-07-28 Ez Environmental Solutions Corporation Pressure washing apparatus with ozonation
EP2663404B1 (fr) 2011-01-14 2017-06-07 Alfred Kärcher GmbH & Co. KG Ensemble buse réversible
US20170072413A1 (en) * 2014-03-05 2017-03-16 Krautzberger Gmbh Extension device for spraying devices and spraying device
WO2019086158A1 (fr) * 2017-11-06 2019-05-09 Wabco Gmbh Dispositif de nettoyage, système d'air comprimé, procédé de nettoyage
WO2019206511A1 (fr) * 2018-04-25 2019-10-31 Alfred Kärcher SE & Co. KG Dispositif de pulvérisation

Also Published As

Publication number Publication date
US20220016654A1 (en) 2022-01-20
CN113926602A (zh) 2022-01-14

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