EP0608796A1 - Distributeur de pression/aspiration d'un appareil de nettoyage à haute pression avec valve de commande additionelle - Google Patents

Distributeur de pression/aspiration d'un appareil de nettoyage à haute pression avec valve de commande additionelle Download PDF

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Publication number
EP0608796A1
EP0608796A1 EP94100936A EP94100936A EP0608796A1 EP 0608796 A1 EP0608796 A1 EP 0608796A1 EP 94100936 A EP94100936 A EP 94100936A EP 94100936 A EP94100936 A EP 94100936A EP 0608796 A1 EP0608796 A1 EP 0608796A1
Authority
EP
European Patent Office
Prior art keywords
pressure
valve
bypass valve
spring
lines
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
Application number
EP94100936A
Other languages
German (de)
English (en)
Other versions
EP0608796B1 (fr
Inventor
Rainer Oberdorfer-Bögel
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
Publication of EP0608796A1 publication Critical patent/EP0608796A1/fr
Application granted granted Critical
Publication of EP0608796B1 publication Critical patent/EP0608796B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • B08B2203/0205—Bypass pressure relief valves

Definitions

  • the present invention relates to a pressure-suction distributor according to the preamble of protection claim 1.
  • Such pressure-suction distributors are used at the outlet of high-pressure pumps in order to supply the high-pressure water to a downstream control valve.
  • This control valve has the task of opening briefly in the start-up phase of the engine and allowing an overflow to the low-pressure side in order to facilitate the start-up of the drive motor for the high-pressure cleaner.
  • a control valve is known which has been found in several applications by the same applicant.
  • Such an embodiment offers the advantage that, if there is an undervoltage which can be caused by corresponding tolerance fluctuations in the mains voltage or by an appropriately undersized extension cable with a corresponding length, the machine still starts up.
  • the drive motor of the high-pressure cleaner then starts up only with difficulty. Such difficult conditions arise especially when high pressure is present on the high-pressure side in the area of the shut-off pistol and goes up to the pressure chamber of the pump. It can happen that starting the drive motor is made difficult under extreme conditions.
  • the invention is therefore based on the object of ensuring that the drive motor of the high-pressure cleaning machine starts up even when working with extreme undervoltage and when high pressure is present on the high-pressure side and is not released by the shut-off gun.
  • the invention is characterized by the technical teaching of claim 1.
  • bypass line (ambient line) is present in the transition between the high pressure side and the low pressure side of the control valve, in which bypass line a double-acting, spring-loaded valve is arranged, which valve is held in the closed position with a spring so that in the event of a pressure surge that is below the working pressure, the valve becomes unstable, d. H.
  • a water flow flows through the valve from the high pressure side to the low pressure side.
  • the valve closes again, so that the normal function of the control valve is established at least when the working pressure is reached.
  • bypass valve is arranged at the outlet of the high-pressure pump in front of the control valve, because an arrangement after the control valve would not make sense because there are other valves there which could impair the function of the bypass valve according to the invention.
  • the bypass line and the bypass valve are integrated in the control valve.
  • the pressure equalization takes place here via a valve arranged at the front end of the control slide, which, depending on the prevailing pressure conditions, assumes a position between two valve seats. Depending on the position of the valve ball, the pressure equalization takes place from the high-pressure line past the control slide through the rear end of the valve sleeve into the low-pressure lines.
  • the control valve 1 is a known part and consists essentially of a spring 18 which is supported at one end on the housing of the control valve 1 and which abuts at its other end on a control slide 27 which is guided in a sleeve 17 slidably.
  • the control valve is shown in half section in the open and closed position.
  • the control slide 27 acts on a valve ball 16, the cooperates with a valve seat 15. Via the high-pressure inlet 2, high-pressure medium is injected into the channel 8 from the outlet of the pump on the pump side 3, said channel being connected directly to the high-pressure inlet 2.
  • the bypass valve according to the innovation is arranged in the region of the channel 8. It essentially consists of an upper valve seat 11 and a lower valve seat 12. Between the upper and lower valve seats 11, 12, the valve ball 10 is arranged spring-loaded by the spring 13. In the closed position shown, the valve ball 10 rests spring-loaded on the upper valve seat 11.
  • valve ball 10 between the two valve seats 11, 12 is in an unstable state and water therefore flows from the high-pressure inlet via the channel 8 into the channel 14, which is connected directly to the low-pressure ring channel 6 , via which the water flows back in the direction of arrow 19 to the pump side 3.
  • the high-pressure water flows through the high-pressure inlet 2 in the direction of the arrow 20 to the control valve 1, which is open as intended, after which the water is then fed via the high-pressure outlet 7 to further pressure valves and then to the manual shut-off gun and finally to the spray gland.
  • the bypass valve according to the invention is part of a pressure-suction distributor 4 which is flanged directly to the pump side 3 of the high-pressure pump and acts as a cover.
  • the pressure-suction distributor is closed on its high-pressure side with a stopper 5.
  • the drive motor of the pump is started at position 21 and the operating pressure increases until it has reached about position 22.
  • the valve ball 10 is lifted from its seat 10 against the force of the spring 13 and water flows briefly via the bypass valve into the channel 14 and thus back to the low-pressure side of the ring channel 6. This relieves the high pressure side of the pump and makes it easier for the drive motor to crank.
  • the pressure rise occurs due to this water drainage, with the bypass valve open, that is to say in the area between positions 22 and 23, with a smaller gradient.
  • bypass valve shown With the bypass valve shown, a bypass flow from the high-pressure outlet side of the pump to the low-pressure side of the pump is briefly generated in order to briefly prevent the pump from starting up against a high pressure at the outlet in order to ensure that the drive motor starts up.
  • bypass valve according to the invention is double is effective. If the HD pump sucks its water through a suction hose from a container, it is prevented that during the start of the suction process the air in line 8 does not enter the suction channel via the bypass valve that is already closed (closing process is automatically effected via spring 13) 6 is pressed.
  • both the bypass line and the bypass valve are integrated into the control valve 1.
  • the bypass line is formed by a valve sleeve 28 which coaxially surrounds the control slide 27 and whose inside diameter is larger than the outside diameter of the control slide 27.
  • the sleeve inner diameter is selected such that a spring 30 is located between the inner sleeve wall and the control slide, which is inserted over the control slide 27 and supported against the shoulder 34.
  • the other end of the spring 30 exerts a spring force on the valve ball 16 and presses it in a direction away from the end face 32 of the control slide 27 against the valve seat 31, which is formed at the front end of the valve sleeve 28.
  • This valve seat is preferably designed as a plastic ring and represents the inlet opening of the bypass line.
  • the outlet opening of the bypass line is formed by radial bores 29 at the rear end of the valve sleeve 28, these bores 29 connecting the bypass line to the low-pressure lines.
  • valve ball 16 In the closed position, the valve ball 16 is pressed by the spring 30 against the valve seat 31. In this position, the valve ball 16 is at a certain distance from the end face 32 of the control slide 27, which is predetermined on the one hand by the dimensions of the valve sleeve 28 with the valve seat 31 and on the other hand by the length of the control slide 27.
  • valve ball 16 When pressure builds up on the pressure side, the valve ball 16 is displaced from its valve seat 31 against the force of the spring 30 in the direction of the arrow 35 toward the end face 32 of the control slide 27 and the bypass valve is thus opened. Pressure equalization can now take place from the high pressure side through the bypass line via the openings 29 of the valve sleeve 28 into the suction lines or low pressure lines. With increasing pressure build-up on the pressure side, the valve ball 16 is finally pressed against the end face 32 of the control slide 27. At the same time, however, the control slide 27 also backs up against the bias of the spring 28 until finally, after the set maximum pressure has been reached, the valve ball 16 comes to rest in the valve seat 36 and the bypass valve closes.
  • the lower limit pressure at which the bypass valve is to be opened or at which lower value the desired pressure equalization in the high-pressure line is to take place can thus be set via the spring 30.
  • the pressure range in which the bypass valve is to be opened is adjustable by the force of the spring 30, so that a conductive connection is established between the pressure side and the low pressure side.
  • a second parameter determining the pressure range is the distance between the two valve seats 31 and 36, which determines the possible displacement path of the valve ball 16.
  • the working pressure which is to prevail on the pressure side after the high-pressure pump has started up can also be adjusted in this embodiment by the spring 18 of the control valve 1. Due to the force of the spring 18, the value of the required pressure can be adjusted, which is necessary in order to be able to push the control slide 27 upward in the direction of arrow 35, so that finally the valve ball 16 abuts the valve seat 36 and the bypass valve closes after the working pressure has been reached .

Landscapes

  • Safety Valves (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Manipulator (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Cleaning In General (AREA)
EP94100936A 1993-01-22 1994-01-24 Distributeur de pression/aspiration d'un appareil de nettoyage à haute pression avec valve de commande additionelle Expired - Lifetime EP0608796B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9300831U 1993-01-22
DE9300831U DE9300831U1 (de) 1993-01-22 1993-01-22 Druck-Saugverteiler eines Hochdruckreinigungsgerätes mit zusätzlichem Steuerventil

Publications (2)

Publication Number Publication Date
EP0608796A1 true EP0608796A1 (fr) 1994-08-03
EP0608796B1 EP0608796B1 (fr) 1997-06-11

Family

ID=6888437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94100936A Expired - Lifetime EP0608796B1 (fr) 1993-01-22 1994-01-24 Distributeur de pression/aspiration d'un appareil de nettoyage à haute pression avec valve de commande additionelle

Country Status (4)

Country Link
EP (1) EP0608796B1 (fr)
AT (1) ATE154420T1 (fr)
DE (2) DE9300831U1 (fr)
ES (1) ES2105359T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950215A1 (fr) * 1997-01-09 1999-10-20 Generac Corporation Vanne de derivation reagissant au debit
DE102009049094A1 (de) * 2009-10-01 2011-04-07 Alfred Kärcher Gmbh & Co. Kg Pumpe für ein Hochdruckreinigungsgerät
CN102537453A (zh) * 2012-01-04 2012-07-04 安徽博一流体传动股份有限公司 自力减压阀
US8439653B2 (en) 2009-10-01 2013-05-14 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning apparatus
US8568109B2 (en) 2009-10-01 2013-10-29 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning device
US8790092B2 (en) 2007-04-11 2014-07-29 Alfred Kaercher Gmbh & Co. Kg High-pressure cleaning appliance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124768A2 (fr) * 1983-04-13 1984-11-14 WOMA-Apparatebau Wolfgang Maasberg & Co. GmbH Appareil de liquide à haute pression
EP0407812A1 (fr) * 1989-07-12 1991-01-16 Alfred Kärcher GmbH & Co. Appareil pour le nettoyage haute pression
US5035580A (en) * 1989-09-14 1991-07-30 Diversified Dynamics Corporation Bypass mode control for high pressure washing system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124768A2 (fr) * 1983-04-13 1984-11-14 WOMA-Apparatebau Wolfgang Maasberg & Co. GmbH Appareil de liquide à haute pression
EP0407812A1 (fr) * 1989-07-12 1991-01-16 Alfred Kärcher GmbH & Co. Appareil pour le nettoyage haute pression
US5035580A (en) * 1989-09-14 1991-07-30 Diversified Dynamics Corporation Bypass mode control for high pressure washing system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950215A1 (fr) * 1997-01-09 1999-10-20 Generac Corporation Vanne de derivation reagissant au debit
EP0950215A4 (fr) * 1997-01-09 2000-01-05 Generac Corp Vanne de derivation reagissant au debit
US8790092B2 (en) 2007-04-11 2014-07-29 Alfred Kaercher Gmbh & Co. Kg High-pressure cleaning appliance
DE102009049094A1 (de) * 2009-10-01 2011-04-07 Alfred Kärcher Gmbh & Co. Kg Pumpe für ein Hochdruckreinigungsgerät
US8439653B2 (en) 2009-10-01 2013-05-14 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning apparatus
US8568109B2 (en) 2009-10-01 2013-10-29 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning device
US8684699B2 (en) 2009-10-01 2014-04-01 Alfred Kaercher Gmbh & Co. Kg Pump for a high-pressure cleaning appliance
CN102537453A (zh) * 2012-01-04 2012-07-04 安徽博一流体传动股份有限公司 自力减压阀
CN102537453B (zh) * 2012-01-04 2013-07-03 安徽博一流体传动股份有限公司 自力减压阀

Also Published As

Publication number Publication date
DE59403061D1 (de) 1997-07-17
EP0608796B1 (fr) 1997-06-11
ES2105359T3 (es) 1997-10-16
ATE154420T1 (de) 1997-06-15
DE9300831U1 (de) 1993-04-22

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