EP1020643B1 - Regelsicherheitsblock für Hochdruck-Reinigungsgeräten - Google Patents

Regelsicherheitsblock für Hochdruck-Reinigungsgeräten Download PDF

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Publication number
EP1020643B1
EP1020643B1 EP19990125456 EP99125456A EP1020643B1 EP 1020643 B1 EP1020643 B1 EP 1020643B1 EP 19990125456 EP19990125456 EP 19990125456 EP 99125456 A EP99125456 A EP 99125456A EP 1020643 B1 EP1020643 B1 EP 1020643B1
Authority
EP
European Patent Office
Prior art keywords
regulating
pressure
spring
safety block
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19990125456
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1020643A2 (de
EP1020643A3 (de
Inventor
Bernd Winkler
Ernst Schaible
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.)
WAP Reinigungssysteme GmbH and Co
Original Assignee
WAP Reinigungssysteme GmbH and Co
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 WAP Reinigungssysteme GmbH and Co filed Critical WAP Reinigungssysteme GmbH and Co
Priority to DK99125456T priority Critical patent/DK1020643T3/da
Publication of EP1020643A2 publication Critical patent/EP1020643A2/de
Publication of EP1020643A3 publication Critical patent/EP1020643A3/de
Application granted granted Critical
Publication of EP1020643B1 publication Critical patent/EP1020643B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • F04B49/035—Bypassing

Definitions

  • the invention relates to a control security block for a High pressure and steam level.
  • This Pressure washers are equipped with a pump that draws the water or bring the steam under the set pressure. Of this Pump now leads a line to a control safety block that is used for the Control of the emerging volume flow and its pressure is used.
  • Such a rule security block is e.g. from the DE 33 22 959 A1 known.
  • a control block for a Hot water high pressure cleaning device described in which in and the same control block, a changeover valve, a pressure switch Safety valve and a flow switch are integrated.
  • the controller for that Hot water high pressure cleaning device with one attached to the device connectable housing works in that the control mechanism is actuated via correspondingly arranged actuating devices.
  • the present invention is therefore based on the object Control block for high pressure and steam stage to develop one fine regulation for the pressure range from 0 to 32 bar as well as for the subsequent pressure range up to 250 bar.
  • the regulation should do so be trained that after switching off the spray lance the pressure in the system is not above the set maximum value of e.g. 32 bar when working with Temperatures above 100 ° C for the cleaning agent.
  • the two springs with different, but preferably proportional, spring constant one appropriate proportional regulation of the pressure range enables. This is it is possible to switch the microswitch over the entire pressure range from 0 to 250 bar to operate proportionally. At a working pressure of 20 bar, for example a switch-off pressure of 25 bar can be set, which at an operating pressure of 200 bar corresponds to a cut-off pressure of 250 bar. This proportional Connection runs over the entire pressure range from 0 to 250 bar for the pre-selected cut-off pressure.
  • the two springs are a smaller, weaker spring with a low spring constant, which is used for the range from 0 to 32 bar, and a second, stronger spring with a larger spring constant, which is used for the range from 32 bar to 250 bar is used. Both springs are arranged in a mechanism that makes it possible to set both a maximum value as a shutdown pressure and a minimum value as a shutdown pressure.
  • the weaker spring is adjusted in a pretensioning range, which covers the range below 32 bar, using a screw mechanism, which is implemented by a manually operable adjusting element in the form of a plug-in sleeve.
  • a moveable, mechanically fixed connection takes over the power transmission to the stronger spring, based on the weaker spring, in order to preload the stronger spring for the switch-off range between 32 and 250 bar.
  • the range up to 250 bar as the maximum Set cut-off pressure this can optionally be set lower become.
  • the maximum pressure cut-off is preferably set at 250 bar.
  • This construction now has the advantage that both the area between 0 and 32 bar as well as the range between 32 and 250 bar proportional can be regulated.
  • a pressure switch in Install the heating control loop for the detergent, which exceed control of the heating to a maximum of 99 ° C at a working pressure of 32 bar limited. Up to a pressure of 32 bar, this allows the heating to be regulated up to 140 ° C.
  • This safety-related device ensures one Temperature range monitoring of the heated cleaning agent in Dependence of the operating pressure. So when the operating pressure is exceeded of 32 bar automatically the temperature of the heating based on this Thermal switch limited to 99 ° C. This ensures that cleaning agents used, preferably water, not in one Temperature range or pressure range is used in which to evaporate starts when the operating pressure is above 32 bar. An operating pressure that is above 32 bar is only possible if the cleaning agent used is below its vapor pressure remains below 99 ° C.
  • a Flow monitoring in the form of a flow monitor for heating the Detergent is arranged.
  • This flow switch consists of essentially consisting of a control piston, a magnetic switch connected cable and a corresponding clamping device for Fixation of the magnetic switch.
  • the Heating for the domestic water when the temperature falls below one corresponding flow rate switched off. This ensures that Detergent is only heated when there is a flow through the spray lance to a sufficient extent.
  • the Magnetic switch by returning the displaceably mounted control piston the heating for the detergent off again.
  • control block 1 shows a sectional view of a control block 1 with a control unit 2, which regulates the pressure or the volume flow, a control unit 3 which is dependent the heating of the cleaning agent, preferably water, from the flow rate, supervised.
  • the control block 1 consists of a one-piece part, in which the corresponding components 2,3,4,5,6 with their individual parts are arranged.
  • Component 4 is an insert for the valve seat, via which the return of the High pressure medium to the connection for fresh water and suction line of the High pressure pump takes place.
  • 5 is an insert for a safety valve which is used for Emergency shutdown when a certain predetermined pressure is exceeded in the Guaranteed interior of the control block.
  • Port 6 is the port for the control block 1, on which the fresh water line and the suction line of High pressure pump merged and connected to control block 1.
  • the control unit 2 for pressure and volume flow control includes in essentially a control rod 27, a spring 33, a further spring 35 Valve 24, which engages in a valve seat 23, and for setting a Pressure range between a maximum and a minimum value required further components 31 to 41.
  • the control unit 3 for the heating interrupts the heating circuit for the Cleaning fluid if the flow rate falls below a minimum.
  • the heating circuit is released using a magnetic switch 45, which by means of a displaceably mounted control piston 10, which against the Spring force of a spring 11 displaced in the outflow direction by the pressure medium is activated and the magnetic switch is activated. So it's a certain one Minimum amount necessary, which is due to the flow of the cleaning agent Control piston 10 acts to the heating circuit through the magnetic switch 45th release.
  • the heating circuit is released via the cable connection 48.
  • the delivery of the high pressure medium to a hose Corresponding spray lance takes place via drain 9.
  • the attachment of the Magnetic switch 45 takes place via the clamping part 46, which is via a screw 47 is arranged around the approximately tubular connection at which the drain 9th is attached.
  • a non-return valve 15 connects, to which an O-ring 18 is arranged opposite a conically arranged depression Prevents the cleaning medium from flowing back. Through this seal the dynamic pressure remains in the area in which the piston 10 is displaceably mounted is maintain.
  • a check valve 15 is located axially inward in control block 1 arranged, which the supply of the high pressure medium from the bore 8 on seals a connecting hole in the connecting hole 8.
  • This check valve has a longitudinal bore 16 through which one Cross bore 17 goes through. If the delivery pressure from the Bore 8 through bore 12 to bore 20 becomes the check valve raised, and detergent can be released by an appropriately approved Inflate the annular space into the bore 20 and continue through the transverse bore 17 in the longitudinal bore 16 and via the drain unit already described in the direction Flush out the spray lance.
  • valve 24 is from the Valve seat 23 lifted off, and that flowing in from the bore of the inflow 8 High pressure medium is in the bypass bore 19 through the valve 23,24 Longitudinal bore 25 passed and continue through the cross bores 26 and Return hole 21 and tap hole 22 to the connection 6 and thus back to the connection to the water pipe or the suction pipe of the high pressure pump guided.
  • a switching arm 29, which is connected to the control rod 27, is arranged axially outward in the direction of the spring 35 above the control piston.
  • This switching arm acts via an adjusting screw on a microswitch that is responsible for switching the high pressure pump on and off.
  • the adjusting screw acts as a switching element for the microswitch and actuates it in accordance with the set range.
  • the microswitch itself is attached to the housing of the control unit responsible for the pressure by means of a screw.
  • FIG 2 is a receptacle 40 via a square 37, the axial Represents extension of the adjusting screw 31, slipped.
  • the Push-in sleeve 40 can now manually pretension the two springs 33, 35 be performed.
  • the spring is used for the pressure range between 0 and 32 bar 33 pressed together using screw movements until the Spring bolt 32 is present at the stop 34 and the fixed mechanical connection for power transmission to the spring 35 takes over. As soon as the spring bolt 32 on Stop 34 is present, sets the effect of the spring constant of the spring 35 for the Pressure range between 32 and 250 bar.
  • the union nut 38 which is on is screwed on the approximately tubular housing of the control unit, so far after screwed back outside until the setting value for the minimum pressure of the Pressure pump, which against the spring force of the springs 33,35 against the Control piston 28 works, is reached. After reaching this axial Longitudinal adjustment is a lock nut 36 against the union nut 38 tightened and thus fixed the seat of the union nut 38 counter. So is the setting for the minimum pressure of the high pressure pump.
  • the spring 33 has the minimum bias, which for the Minimum pressure is required and the maximum limit is the stop of the Spring bolt 32 on the stop 34, the spring travel of the spring 33 to that effect limits that the spring pin 32 has the length that is necessary that When a pressure of over 32 bar is reached, a mechanically firm connection to spring 35 occurs and thus the spring constant from spring 33 to Spring constant of spring 35 changes.
  • the receptacle 40 over the Pushed square and a lock nut 41 to fix the socket or tightened to lock the adjusting nut 39. So now both areas Maximum and minimum range of the pressure regulator set. By twisting the The socket is now the square in the axial direction outwards or inwards rotated and thus the preload of the springs 33, 35 adjusted accordingly, which is then used to switch off the pump and set it accordingly Printing area are responsible.
  • the representation is chosen so that it is the setting for the Reproduces the maximum value of the pressure range.
  • the spring bolt 32 is present at the stop 34, so that the effect of Spring 33 is overridden and the biasing force directly above the Spring bolt 32 and the stop 34 is transmitted to the spring 35.
  • the adjusting screw 31 on the approximately tubular housing the control unit 2 is seated, as is the adjusting nut 39 at the end of the Adjustment screw 31 is seated, pushed against the square 37 the socket 40 rests, which with the lock nut 41, the adjusting nut 39th fixed.
  • This setting shows the maximum preload of the springs and of the intermediate transmission system in the form of the spring bolt 32 and the stop 34.
  • FIG. 2 there is an adjusting screw 43 for the microswitch 42 on the switching arm 29 arranged, which for fine adjustment of the switching range of the microswitch can be adjusted and fixed using a lock nut 44.
  • a lock nut 44 Through the Fine threads of the adjusting screw make it easy and straightforward possible, the switching point for the corresponding pressure range exactly adjust.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
  • Safety Valves (AREA)
EP19990125456 1999-01-14 1999-12-21 Regelsicherheitsblock für Hochdruck-Reinigungsgeräten Expired - Lifetime EP1020643B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK99125456T DK1020643T3 (da) 1999-01-14 1999-12-21 Reguleringssikkerhedsblok til höjtryksrenserapparaturer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29900463U 1999-01-14
DE29900463U DE29900463U1 (de) 1999-01-14 1999-01-14 Regelsicherheitsblock für Hochdruck- und Dampfstufe

Publications (3)

Publication Number Publication Date
EP1020643A2 EP1020643A2 (de) 2000-07-19
EP1020643A3 EP1020643A3 (de) 2000-12-27
EP1020643B1 true EP1020643B1 (de) 2004-08-04

Family

ID=8067902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990125456 Expired - Lifetime EP1020643B1 (de) 1999-01-14 1999-12-21 Regelsicherheitsblock für Hochdruck-Reinigungsgeräten

Country Status (4)

Country Link
EP (1) EP1020643B1 (no)
DE (2) DE29900463U1 (no)
DK (1) DK1020643T3 (no)
NO (1) NO20000073L (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2518320A1 (de) 2011-04-27 2012-10-31 Nilfisk-Advance A/S Regelsicherheitsblock für Hochdruck-Reinigungsgeräte mit Schalteinrichtung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347721B (en) * 1999-03-11 2003-04-23 Gary Richard Noble Pump initiation test assembly
DE10029226C2 (de) * 2000-06-14 2003-11-06 Wap Reinigungssysteme Regelsicherheitsblock mit Schwingungsdämpfer für Hochdruckreiniger
EP3812053A1 (de) 2019-10-24 2021-04-28 Andreas Stihl AG & Co. KG Hochdruckreiniger und verfahren zur montage eines hochdruckreinigers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE964457C (de) * 1953-07-11 1957-05-23 Fr August Neidig Soehne Maschi Federbelastetes UEberdruck- und Regelventil fuer Foerderpumpen
DE1222340B (de) * 1962-02-27 1966-08-04 Hauhinco Maschf Ventil zur selbsttaetigen Regelung der Druckluft-zufuhr zu einem Druckluft-Kolbenmotor, der eine Kolbenpumpe zur Lieferung von Fluessigkeiten regelbaren Druckes antreibt
DE3322959A1 (de) * 1983-06-25 1985-01-10 Guido Oberdorfer Wap-Maschinen, 7919 Bellenberg Steuerblock fuer ein heisswasser-hochdruck-reinigungsgeraet
DE3936155C2 (de) * 1989-10-31 1995-04-13 Kraenzle Josef Vorrichtung zur Steuerung von Pumpen für Flüssigkeitsförderanlagen
WO1996014171A1 (en) * 1994-11-07 1996-05-17 Kew Industri A/S High-pressure cleaner with an automatic control unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2518320A1 (de) 2011-04-27 2012-10-31 Nilfisk-Advance A/S Regelsicherheitsblock für Hochdruck-Reinigungsgeräte mit Schalteinrichtung
DE202011005630U1 (de) 2011-04-27 2014-02-07 Nilfisk-Advance A/S Regelsicherheitsblock für Hochdruck-Reinigungsgeräte mit Schalteinrichtung

Also Published As

Publication number Publication date
EP1020643A2 (de) 2000-07-19
NO20000073L (no) 2000-07-17
DE29900463U1 (de) 2000-02-24
EP1020643A3 (de) 2000-12-27
NO20000073D0 (no) 2000-01-07
DE59910124D1 (de) 2004-09-09
DK1020643T3 (da) 2004-12-06

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