WO2004111452A1 - Pompe haute pression - Google Patents

Pompe haute pression Download PDF

Info

Publication number
WO2004111452A1
WO2004111452A1 PCT/CH2004/000324 CH2004000324W WO2004111452A1 WO 2004111452 A1 WO2004111452 A1 WO 2004111452A1 CH 2004000324 W CH2004000324 W CH 2004000324W WO 2004111452 A1 WO2004111452 A1 WO 2004111452A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic
pressure
control head
pressure pump
relief valve
Prior art date
Application number
PCT/CH2004/000324
Other languages
German (de)
English (en)
Inventor
Dietmar Kaiser
Original Assignee
Dietmar Kaiser Ag
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 Dietmar Kaiser Ag filed Critical Dietmar Kaiser Ag
Publication of WO2004111452A1 publication Critical patent/WO2004111452A1/fr

Links

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
    • F04B49/002—Hydraulic systems to change the pump delivery
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
    • F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor

Definitions

  • the invention relates to a high-pressure pump, for example for use with a sewer cleaning vehicle, according to the preamble of patent claim 1.
  • High-pressure pumps of the generic type have a wide range of applications. For the cleaning of tanks, shafts, sewers, water or a similar fluid medium is usually applied under high pressure so that impurities can be removed. High-pressure pumps operated with hydraulic fluid are often used to generate the required high working pressure of the applied medium, which can be up to 200 bar and more.
  • a first piston is periodically moved back and forth via a hydraulic fluid circuit in a closed housing.
  • a control head has all the necessary channels, bores and changeover valves for controlling the flow of hydraulic fluid, usually hydraulic oil, for moving the hydraulic piston.
  • the hydraulic piston is connected to a compressor piston which can be moved back and forth periodically in a connected housing part in accordance with the movement of the hydraulic piston.
  • the compressor piston divides the interior of the housing part into two chambers.
  • High-pressure pumps are therefore also known in which an overpressure safety device, for example a pressure relief valve, is arranged within the control head for the hydraulic part of the high-pressure pump.
  • the arrangement of the pressure relief valve within the control head means that the entire control head, with all of its channels and bores for the hydraulic fluid, is to be regarded as a safety-relevant device.
  • each individual control head with an integrated pressure relief valve must therefore be checked and approved by a licensing authority. Even if it is possible to obtain overall approval for one type of control head, this is restricted to this type.
  • approvals of safety-relevant facilities are always limited to the respective state or territory for which or for which they were granted. For each modification of the control head, for a different control head type or for a delivery to a state or territory that is not covered by the approval, new separate approvals must be carried out in accordance with the applicable regulations.
  • the object of the present invention is therefore to avoid the disadvantages of the high-pressure pumps of the prior art.
  • a high-pressure pump is to be created which can be operated reliably and safely and can be easily adapted to the respective safety requirements.
  • the high-pressure pump should be equipped with an overpressure safety device, which environmental damage largely prevented.
  • the high-pressure pump should be inexpensive for the manufacturer and for the user.
  • the invention proposes a high-pressure pump, for example for use with a canal cleaning vehicle, which has the features stated in the characterizing section of patent claim 1. Further developments and / or advantageous embodiments of the invention are the subject of the dependent claims.
  • the invention provides a high-pressure pump with a hydraulic part which has a hydraulic piston which can be moved periodically in a closed housing, with a compressor part for a fluid medium, for example water, which has a compressor piston which is arranged displaceably in a housing adjoining the hydraulic part and with the hydraulic piston is connected, and with a control head for the hydraulic part, which with channels, bores and
  • Switching valves for the hydraulic part is connected and has a pressure relief valve.
  • the pressure relief valve is arranged outside the control head, preferably in the supply line for the hydraulic fluid.
  • the control head Since the pressure relief valve is arranged outside the control head for the hydraulic part, the control head is not a safety-relevant component that is subject to approval.
  • the pressure relief valve located outside the control head can be selected according to the requirements of the respective state or region. Only the pressure relief valve needs to be checked. Modifications to the control head, the channel and bore guide no longer affect the approval. A tested pressure relief valve can also be used for other control heads. As a result, high-pressure pumps are also more economical to manufacture.
  • the pressure-limiting valve arranged on the hydraulic side, preferably in the feed line for the hydraulic fluid, makes it possible to dispense with pressure-limiting on the fluid side. A conventional pressure limiter without a rupture disc can therefore be used. Soiling from the Fluid pressure escaping under high pressure is thereby avoided.
  • the pressure relief valve can be arranged completely detached from the control head in the supply line for the hydraulic fluid, usually hydraulic oil.
  • the pressure relief valve can advantageously be connected to a hole provided in the control head.
  • the pressure relief valve can preferably be screwed detachably into the bore on the control head. The fact that the pressure relief valve is mounted directly on the control head ensures that the high-pressure pump has already been approved and approved by the manufacturer or supplier
  • Pressure relief valve is equipped. This can also be indicated by additional markings, lead seals or the like. The user only has to connect the high-pressure pump to the existing hydraulic lines and does not have to worry about overpressure protection. If required, the pressure relief valve can be replaced very easily by specialist personnel.
  • a collecting device is preferably provided for the hydraulic fluid emerging from the pressure relief valve in the event of excess pressure. This ensures that no hydraulic fluid can escape into the environment.
  • the device can preferably also be connected to a reservoir for the hydraulic fluid. In this case, it is a completely closed system from which no hydraulic fluid can escape.
  • An already type-tested safety component is advantageously used as a pressure relief valve.
  • Such components are available on the market in the respective countries or regions. They have already been checked and approved. This usually eliminates the need for a further type test or approval for the high pressure pump.
  • the channels and bores of the control head in deflection, junction and cross areas rounded, preferably continuous, contours and transitions. This optimization of the channel contours and geometries avoids undesirable turbulence and turbulence, which could lead to an uncontrolled build-up of pressure within the control head.
  • the more favorable flow conditions in the control head reduce the energy required to operate the hydraulic part, which is an additional advantage that should not be underestimated for the user.
  • the control head is arranged between the hydraulic part and the compressor part.
  • the arrangement according to the invention of the pressure relief valve outside the control head is suitable for all generic high pressure pumps.
  • the embodiment is not limited to the arrangement of hydraulic part and compression part outlined in the following description.
  • the hydraulic part can also be arranged centrally between two compressor parts for a fluid medium, for example water.
  • the hydraulic piston is connected to the compressor pistons arranged on both sides in an axial extension.
  • the only schematic illustration shows an axial section of a generic high-pressure pump, which is provided overall with the reference number 1.
  • the high-pressure pump 1 shown comprises a hydraulic part 2 and a compressor part 3.
  • a hydraulic piston 22 is periodically moved back and forth via a hydraulic fluid circuit 26, 2728 in a closed housing 21, the hydraulic cylinder.
  • the hydraulic piston 22 divides the hydraulic cylinder into two chambers 24, 25, which are alternately filled or emptied with pressurized hydraulic fluid.
  • a control head 5 has all the necessary channels and bores, as well as a changeover valve 51 for controlling the flow of the hydraulic fluid, usually hydraulic oil, for moving the hydraulic piston.
  • the two switching states of the changeover valve 51 are indicated schematically in FIG.
  • the hydraulic piston 22 is connected to a compressor piston 32 via a piston rod 23.
  • the compressor piston 32 can be moved back and forth periodically in a connected housing part 31 according to the movement of the hydraulic piston 22. In many cases the two housing parts 21, 31 are combined to form a single common housing.
  • the passages of the piston rod 23 are sealed on the hydraulic side and on the compressor side from the respective media, mostly hydraulic oil H and water W.
  • the compressor piston 32 divides the interior of the housing part 31 into two chambers 34, 35.
  • the chambers 34, 35 are connected to a supply line 36 for the fluid medium W.
  • Inlet valves 38 control access to one 34 or the other chamber 35.
  • the two chambers are connected to an outflow line 37 for the fluid medium W expelled under high pressure.
  • Outflow valves 39 regulate the alternating outflow of the fluid medium from the two chambers 34, 35.
  • the fluid medium for example water W
  • the fluid medium W is pressed out of the second chamber 34 under high pressure.
  • the inlet and outlet valves 38, 39 can be actuated automatically by the flow of the fluid medium W and regulate the suction of the fluid medium W into the first or the second chamber or the discharge from the second or the first chamber.
  • a gas-filled bladder 41 is arranged within the pressure container 4 and is more or less compressible.
  • the compressor piston 32 stands still for a short time and does not convey any water. So that no abrupt pressure drop occurs in this phase, the compressed medium 41 presses the fluid medium out of the pressure vessel 4 into the outflow line 37. As a result, the pressure of the pressed medium can be kept largely constant. The pressure drop that may still occur is very small.
  • a pressure relief valve 6 is provided as a pressure relief device.
  • the pressure relief valve 6 is arranged outside the control head 5, in the feed line 26 for the hydraulic fluid H.
  • the pressure relief valve 6 is shown in the schematic drawing. Distance from the control head 5 shown.
  • the control head 5 is advantageously equipped with a bore that branches off from the supply line for the hydraulic fluid and is designed for the direct connection of the pressure relief valve 6.
  • the bore is preferably provided with an internal thread, into which the pressure limiting valve 6 can be screwed releasably.
  • the pressure relief valve 6 is triggered at a predeterminable excess pressure and thereby prevents an undesirable, safety-relevant pressure build-up in the high pressure pump 1.
  • a pressure-tested valve 6 is advantageously a type-tested component.
  • a pressure relief valve from Denison Hydraulic, type R4V can be used.
  • the hydraulic fluid H emerging at the pressure relief valve 6 in the event of activation is advantageously collected and returned to a reservoir for the hydraulic fluid H. It can also be provided that the pressure limiting valve 6 directs the hydraulic fluid H fed via the feed line 26 directly back into the discharge line 27.
  • the arrangement of the pressure relief valve according to the invention is suitable for all generic high pressure pumps.
  • the control head is arranged between the hydraulic part and the compressor part.
  • the arrangement according to the invention of the pressure limiting valve outside the control head is suitable for all generic high pressure pumps.
  • the embodiment is not limited to the arrangement of hydraulic part and compression part outlined in the following description.
  • the hydraulic part can also be arranged centrally between two compressor parts for a fluid medium, for example water. to be in order.
  • the hydraulic piston is connected to the compressor pistons arranged on both sides in an axial extension.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe haute pression comprenant une partie hydraulique (2) qui comprend un piston hydraulique (22) pouvant être déplacé périodiquement dans un logement (21) fermé hermétiquement, une partie compression (3) conçue pour une substance fluide (W), par exemple de l'eau, comportant un piston de compression (32) qui est disposé de manière déplaçable dans un logement (31) adjacent à la partie hydraulique (2) et qui est relié à un piston hydraulique (22), ainsi qu'une tête de commande (5) conçue pour la partie hydraulique (2), qui est pourvue de conduits, d'orifices ainsi que d'une soupape d'inversion (51) pour le flux hydraulique (H) et qui comprend une soupape de limitation de pression (6). Selon l'invention, cette soupape de limitation de pression (6) est disposée à l'extérieur de la tête de commande (5), de préférence dans un conduit d'alimentation (26) en fluide hydraulique (H).
PCT/CH2004/000324 2003-06-13 2004-05-28 Pompe haute pression WO2004111452A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH10352003 2003-06-13
CH1035/03 2003-06-13

Publications (1)

Publication Number Publication Date
WO2004111452A1 true WO2004111452A1 (fr) 2004-12-23

Family

ID=33546149

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2004/000324 WO2004111452A1 (fr) 2003-06-13 2004-05-28 Pompe haute pression

Country Status (1)

Country Link
WO (1) WO2004111452A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010066069A1 (fr) * 2008-12-12 2010-06-17 Yu Chun Kwan Dispositif à énergie hydraulique
DE102009049242A1 (de) * 2009-10-12 2011-04-21 Schaeffler Technologies Gmbh & Co. Kg Hydraulische Pumpeinrichtung
FR3002988A1 (fr) * 2013-03-07 2014-09-12 Emmanuel Didier Tubulure a verin, amplificatrice de volume fluidique poussee.
CN105465430A (zh) * 2015-02-17 2016-04-06 江苏瑞朗博机械设备有限公司 高压工况压杆失稳触发型泄压阀
CN105465431A (zh) * 2015-02-28 2016-04-06 江苏瑞朗博机械设备有限公司 模块化设计高压工况压杆失稳触发型泄压阀
CN105465461A (zh) * 2015-02-17 2016-04-06 江苏瑞朗博机械设备有限公司 弯曲销触发型先导式泄压阀
AT516738A4 (de) * 2015-02-23 2016-08-15 Reinhard Ing Gruber Verfahren und Vorrichtung zum Betreiben einer hydraulischen Hochdruckanlage
WO2017059918A1 (fr) * 2015-10-08 2017-04-13 Energy Harvest As Dispositif d'élévation de liquide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1374538A (en) * 1971-04-08 1974-11-20 Anderson Greenwood & Co Piston pump
EP0075618A1 (fr) * 1981-09-25 1983-04-06 HARBIDGE, John Arrangement de contrôle d'un circuit de fluide sous pression
US4514148A (en) * 1982-11-01 1985-04-30 Carter Controls, Inc. Hydraulically actuated pump
EP0666420A1 (fr) * 1994-02-01 1995-08-09 Kabushiki Kaisha Kosmek Dispositif d'actionnement de piston à pression de fluide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1374538A (en) * 1971-04-08 1974-11-20 Anderson Greenwood & Co Piston pump
EP0075618A1 (fr) * 1981-09-25 1983-04-06 HARBIDGE, John Arrangement de contrôle d'un circuit de fluide sous pression
US4514148A (en) * 1982-11-01 1985-04-30 Carter Controls, Inc. Hydraulically actuated pump
EP0666420A1 (fr) * 1994-02-01 1995-08-09 Kabushiki Kaisha Kosmek Dispositif d'actionnement de piston à pression de fluide

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010066069A1 (fr) * 2008-12-12 2010-06-17 Yu Chun Kwan Dispositif à énergie hydraulique
DE102009049242A1 (de) * 2009-10-12 2011-04-21 Schaeffler Technologies Gmbh & Co. Kg Hydraulische Pumpeinrichtung
FR3002988A1 (fr) * 2013-03-07 2014-09-12 Emmanuel Didier Tubulure a verin, amplificatrice de volume fluidique poussee.
CN105465430A (zh) * 2015-02-17 2016-04-06 江苏瑞朗博机械设备有限公司 高压工况压杆失稳触发型泄压阀
CN105465461A (zh) * 2015-02-17 2016-04-06 江苏瑞朗博机械设备有限公司 弯曲销触发型先导式泄压阀
AT516738A4 (de) * 2015-02-23 2016-08-15 Reinhard Ing Gruber Verfahren und Vorrichtung zum Betreiben einer hydraulischen Hochdruckanlage
AT516738B1 (de) * 2015-02-23 2016-08-15 Reinhard Ing Gruber Verfahren und Vorrichtung zum Betreiben einer hydraulischen Hochdruckanlage
CN105465431A (zh) * 2015-02-28 2016-04-06 江苏瑞朗博机械设备有限公司 模块化设计高压工况压杆失稳触发型泄压阀
WO2017059918A1 (fr) * 2015-10-08 2017-04-13 Energy Harvest As Dispositif d'élévation de liquide
US10626855B2 (en) 2015-10-08 2020-04-21 Energy Harvest As Liquid lifting device

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