EP2638297B1 - Entraînement hydraulique ou pneumatique pour l'actionnement d'un appareil de robinetterie comportant une soupape de réglage ou de commande - Google Patents

Entraînement hydraulique ou pneumatique pour l'actionnement d'un appareil de robinetterie comportant une soupape de réglage ou de commande Download PDF

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Publication number
EP2638297B1
EP2638297B1 EP11782040.7A EP11782040A EP2638297B1 EP 2638297 B1 EP2638297 B1 EP 2638297B1 EP 11782040 A EP11782040 A EP 11782040A EP 2638297 B1 EP2638297 B1 EP 2638297B1
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EP
European Patent Office
Prior art keywords
valve
valves
cylinder
hydraulic
control
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.)
Active
Application number
EP11782040.7A
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German (de)
English (en)
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EP2638297A1 (fr
Inventor
Hans-Juergen Finke
Meik Brinkmann
Dirk Bracht
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.)
Robert Bosch GmbH
Uniper Technologies GmbH
Original Assignee
Robert Bosch GmbH
EOn Engineering GmbH
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Publication of EP2638297A1 publication Critical patent/EP2638297A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/008—Valve failure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F15B2211/7054—Having equal piston areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
    • F15B2211/8636—Circuit failure, e.g. valve or hose failure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/875—Control measures for coping with failures
    • F15B2211/8757—Control measures for coping with failures using redundant components or assemblies

Definitions

  • the invention relates to a hydraulic or pneumatic (fluidic) drive, which is provided for the actuation of valves having a switching or control valve, and comprises a control cylinder and a safety circuit which is connected in a line to which a cylinder chamber of the actuating cylinder , Two in series with each other connected shut-off valves.
  • the valve can be used, for example, in a power plant, in the chemical or petrochemical industry, in oil and gas production, etc. Fittings are for example auxiliary safety valves, quick-acting valves, quick-opening valves, control valves, quick-release flaps, pilot valves, self-medium controlled isolation valves in power plants, valves for mixing the same or different substances, etc.
  • a hydraulic safety circuit for a double-acting hydraulic cylinder with two pressure chambers is known in which in the event of an emergency shutdown, the two pressure chambers are connected to each other via a plurality of parallel pilot operated poppet valves.
  • the pilot control is supplied either via a check valve from the pressurized chamber of the hydraulic cylinder or via a check valve from an external pressure source. In this safety circuit, it can be tolerated if one of the parallel-connected poppet valves fails during the quick shutdown.
  • a safety circuit in which four logic valves according to the basic principle of the latter US 5,133,189 are arranged.
  • a pressure chamber of a working cylinder can be relieved in an emergency via two mutually parallel discharge lines.
  • two logic valves arranged in series are provided, one of which is an active logic valve and the other is a passive logic valve.
  • a disadvantage of such safety circuits is that each passive logic valve can only be tested together with the active logic valve of the parallel line.
  • a connecting line with a throttle is provided between the two parallel lines.
  • the invention is based on the object to provide a hydraulic or pneumatic (fluidic) drive for the actuation of valves with a switching or control valve having the features of the preamble of claim 1 and in which the safety-relevant function of the shut-off valves can be tested individually at any time without the safety circuit or the control or switching valve or the system must be taken out of service.
  • the fluidic drive according to the invention can be used in particular for actuating a regulating or switching valve of a valve, for example in a power plant.
  • the drive has an actuating cylinder which has at least one cylinder chamber which is connected to a hydraulic or pneumatic line.
  • a safety circuit is provided which has two shut-off valves connected in series with each other.
  • the two shut-off valves are a first 2/2-way cartridge valve (logic valve) and a second 2/2-way cartridge valve (logic valve), each with a main control piston through which the fluidic connection between two respective working ports of a cartridge valve is controllable.
  • the two 2/2-way cartridge valves each have a pilot valve.
  • the second 2/2 way cartridge valves are fluidly closer to the cylinder chamber than the first 2/2-way cartridge valve.
  • At least this first 2/2-way cartridge valve is an active logic valve having an active in the opening direction surface, which is acted upon by the associated pilot valve, regardless of whether there is a pressure at one of the working ports, with a pressure.
  • One of the two built-in valves can be designed as a passive logic valve without active surface, since at one of its working connections from the actuating cylinder or from a source of external pressure is present, which opens the cartridge valve after relieving a spring chamber of the cartridge by the associated pilot valve.
  • the with its working ports serially arranged for a cartridge valve other cartridge valve is an active logic valve.
  • the pilot valves of the two 2/2-way cartridge valves are connected with their connected to a pressure medium source and a pressure medium sink ports parallel to each other, so they can independently control the respective main stage.
  • the active-logic valve with the area active in the opening direction is preferably the 2/2-way cartridge valve, at the working ports of which no pressure is present in normal operation.
  • this cartridge valve can be switched to test over the active area - in particular - be opened.
  • both 2/2-way cartridge valves are active logic valves. This has the advantage that the cartridge valves open very quickly.
  • valve block having the logic valves can also be interchanged with respect to the actuating cylinder with respect to the actuating cylinder to be connected to the actuating cylinder.
  • selection valve arrangements in the form of, for example, two check valves or a so-called shuttle valve that the Pilot valves are supplied in each case from the pressurized cylinder chamber with pressure medium and connected to their tank port to the cylinder chamber with the lower pressure, so there is an additional security with regard to the assembly.
  • the actuating cylinder is a synchronous cylinder with a second cylinder chamber.
  • the two cylinder chambers can be connected to one another via the line and via the two 2/2-way cartridge valves. It can then be displaced from the pressurized cylinder chamber, the pressure medium in the other cylinder chamber, so that the valve under the influence of pressure conditions can reach her in a safe position.
  • the actuating cylinder also has a second cylinder chamber and is therefore also double-acting.
  • the actuating cylinder can also be a synchronous cylinder.
  • a synchronous cylinder is a cylinder in which the two cylinder chambers are facing equally large effective piston surfaces.
  • a second hydraulic line is connected, in which a second safety circuit is provided.
  • This is designed in accordance with the first safety circuit and accordingly has a third 2/2-way cartridge valve and a fourth 2/2-way cartridge valve connected in series therewith.
  • These each include a main control piston, with which the fluidic connection between two respective working ports is controllable, and a pilot valve.
  • At least one, preferably both 2/2-way cartridge valves of the second safety circuit are active logic valves having an active in the opening direction surface, which is acted upon by the associated pilot valve independent of the working ports with a pressure.
  • a test of the cartridge valves of a line is independent of the installation valves of the other line and regardless of whether a pressure is present at a working port of the third and / or fourth 2/2-way cartridge valve.
  • the active logic valve with the active in the opening direction surface is the 2/2-way cartridge valve, at its working ports in normal operation no pressure is present.
  • this cartridge valve can be switched to test over the active area - in particular - be opened.
  • a branching line can be connected to a further 2/2-way cartridge valve to the first and to the second line between the two cartridge valves.
  • These cartridge valves also each have a main control piston, with which the fluidic connection between two respective working ports is controllable, and they each have a pilot valve. With such a hydraulic drive, the actuating cylinder can be adjusted in emergency operation as needed in a first or in a second direction.
  • the operation of the 2/2-way cartridge valves can be easily tested.
  • the closed position and the open position of a 2/2-way cartridge valve are monitored.
  • a position sensor is used for position monitoring, for example in the form of an analogue encoder, with which each position of a main control piston can be detected, for example stop strokes can be used to detect differently set opening strokes of a main control piston without a limit switch also having to be readjusted. Only one other signal from the position transmitter can be regarded as authoritative electronically.
  • the pilot valves position monitoring valve body.
  • the position monitoring can be carried out by means of limit switches.
  • the main control pistons have seals.
  • these seals can be arranged in particular between the spring chamber and the active surface.
  • the pilot valves are 4/2 directional seat valves.
  • the spring chamber of the associated cartridge valve acted upon in the closing direction acting control pressure while the active surface to be relieved.
  • emergency mode can Relieved via the 4/2-way poppet valve (reversed) the spring chamber and the active surface are acted upon by acting in the opening direction control pressure.
  • the first-mentioned fluidic connections take place at an energized switching position and the second-mentioned fluidic connections in a currentless basic position of the 4/2-way seat valve.
  • all 2/2-way cartridge valves are active logic valves having an active in the opening direction surface, which is acted upon by the associated pilot valve independent of the working ports with a pressure. This allows each cartridge valve to be tested without pressure on any of its working ports. This increases the flexibility of the safety circuit and reduces the effects of a faulty assignment of the installation valves during assembly. Due to the pressurization of the additional effective in the opening direction open the active logic valves very fast.
  • a position sensor is arranged on a piston or on a piston rod of the actuating cylinder.
  • the actuator cylinder is actuated independently of the 2/2-way cartridge valves via a proportional or black / white directional control valve.
  • a seat valve (blocking valve) is provided as a safety valve, with which the actuating cylinder and thus the valve can be kept leak oil-free in a predetermined position.
  • the directional control valve and the blocking valve are actuated and the actuating cylinder, powered by a pressure connection and a tank connection, moved.
  • this system not only checks the function itself, but also detects changes that creep over a longer time Period could result (condition monitoring). By monitoring the proportional valve or the black / white directional control valve and the blocking element, the actual work elements are included in the review.
  • a real movement on the actuating cylinder may only take place in the per thousand range, based on the total possible working stroke.
  • a change of the valve spindle triggers no real movement at the valve seat of the valve, when the movement takes place within the Hook's straight line of the preloaded valve spindle.
  • safety blocks are arranged parallel to one another, then the safety blocks remain in function when checking a safety block in order to ensure safety.
  • a first variant of the safety circuit according to the invention has a control cylinder, via which a main valve in an emergency (but possibly not only in an emergency) can be relieved hydraulically or pneumatically, wherein - in particular for what - the actuating cylinder has a first cylinder chamber and a second cylinder chamber which are connectable to each other via a working line.
  • a first and a second series-connected shut-off valve are provided in the Working line.
  • the actuating cylinder may be, for example, a differential or synchronous cylinder.
  • a second variant of the safety circuit according to the invention has a control cylinder, via which a main valve in an emergency (-aber possibly not only in an emergency) can be actuated hydraulically or pneumatically, wherein the actuating cylinder has a first cylinder chamber, in particular via a first pressure medium flow path via a first working line - can be supplied with pressure medium.
  • a first and a second series-connected shut-off valve are provided in the first pressure medium flow path - in particular in the first working line - .
  • the actuating cylinder may e.g. be a differential or synchronous cylinder with two cylinder chambers.
  • one of the two shut-off valves can be tested while the other shut-off valve remains closed. Neither the valve nor the system needs to be taken out of service.
  • the second variant of the actuating cylinder has a second cylinder chamber, which is relieved via a second working line.
  • a first and a second series-connected shut-off valve are provided in the second working line.
  • the second variant of the actuating cylinder has a second cylinder chamber, which is supplied via a second pressure medium flow path with pressure medium accordingly.
  • the first and the second cylinder chamber via the respective pressure medium flow path alternatively - in particular to a tank - relieved.
  • a first and a second series-connected shut-off valve are provided in the second pressure medium flow path.
  • shut-off valves There may be a total of six shut-off valves, two of which are working shut-off valves, which are directly connected to the two cylinder chambers and two of which are P shut-off valves, both directly connected to a pressure port of the safety circuit, and two of which Shut-off valves are both directly connected to a tank connection of the safety circuit.
  • the series-connected shut-off valves are respectively formed by logic valves or 2/2-way poppet valves having a valve body having a closing direction effective closing surface and an effective in the opening direction annular surface.
  • the closing surface and the annular surface are both alternatively - in particular to the tank - relieved or acted upon with pressure medium.
  • logic valves or the 2/2-way poppet valves in each case by a 4/2-way valve - are piloted - especially in the seat design.
  • the currentless switching to the emergency operation of the safety circuit so the opening of the main valve can be done when the 4/2-way valve a valve body has, in its biased by a spring emergency position in the closing direction effective closing surface - in particular to the tank - is relieved, while in the opening direction effective annular surface is acted upon with pressure medium.
  • the main valve is a shut-off valve or a safety valve of a system under vapor pressure.
  • FIG. 1 shows a circuit diagram of a valve assembly of a hydraulic drive, at its designated A1 and B1 ports each directly a working chamber 4; 204 and 6, respectively; 206 of one (in the Figures 2 and 4 to 8 shown) double-acting actuator cylinder 2; 202 are connected.
  • the adjusting cylinder 2; 202 serve to set a respective safety valve or control valve 1; 101; 401 of a fitting.
  • a control valve 1; 101; 401 is, for example, a steam valve that can assume intermediate positions in normal operation in order to control the steam flow.
  • the valve may also be a switching valve, which is closed or open in normal operation and should take in certain situations in its second position.
  • FIG. 1 To adjust the control valve 1; 101; 401 in normal operation supplies the in FIG. 1 shown valve assembly of the hydraulic drive one of the ports A1, B1 with a pressurized fluid (oil, air, gas or gas mixture), which is available at a pump port P, while connecting the other of the two ports A1, B1 with a tank port T.
  • a proportional (continuously) adjustable 4/3 way valve 26 is arranged, via which the pressurization of the terminals A1, B1 and thus the positioning of the control valve. 1 ; 101; 401 takes place.
  • the proportional valve 26 is connected via a pump line 28 to the pump port P and via a tank line 30 to the tank port T.
  • the position of a valve spool of the proportional valve 26 can be detected with a displacement sensor 31.
  • An output of the proportional valve 26 is connected via a working line 32 to the port A1, while a second port of the proportional valve 26 is connected via a second working line 34 to the port B1.
  • a seat valve 36 is arranged, via which the two working lines 32, 34 can be shut off.
  • the seat valve 36 serves to the adjusting cylinder 2; 202 in case of failure of the electrical system or a safety check in any position of the control valve 1; 101; 401 leak-free to keep in a predetermined position.
  • serving as the main directional valve proportional valve 26 and serving as a safety blocking element seat valve 36 are actuated and the actuating cylinder 2; 202 proceed.
  • the control of the actuating cylinder via an in FIG. 1 shown switching valve done.
  • FIG. 2 shows a circuit diagram of a first embodiment of a safety circuit according to the invention. It has a safety valve or control valve 1, which is in an emergency to relieve a (not shown) system that is under vapor pressure.
  • the safety valve or control valve 1 has a valve body, which is held in a normal operation of the system against the vapor pressure at a valve seat and in an emergency in the (in FIG. 2 ) is lifted off position shown. The pressure of the steam is supportive.
  • a synchronous cylinder 2 with the two in the free cross-section the same size cylinder chambers 4 and 6 is present, wherein by supplying pressurized fluid into the cylinder chamber 6 with simultaneous displacement of pressurized fluid from the Cylinder chamber 4, the valve 1 is actuated in the closing direction and by allowing an outflow of pressurized fluid from the cylinder chamber 6 in the opening direction.
  • the pressure in the cylinder chamber 6 results from the pressure in the cylinder chamber 4 and the force exerted by the steam in the opening direction of the valve 1 on this. While maintaining a pressure above this pressure in the cylinder chamber 6, the valve 1 can also be kept closed.
  • 6 of the synchronous cylinder 2 can be connected via a working line, which consists of the working line sections 8a, 8b, 8c, 8d, 8e and 8f.
  • a position sensor 21 is arranged on a piston rod of the actuating cylinder 2.
  • a first logic valve 12 is provided, while between the two working line sections 8d and 8e, a second logic valve 14 is provided.
  • the two according to the invention in series logic valves 12, 14 are 2/2-way poppet valves and in FIG. 2 shown in a normal or basic position. In this case, both logic valves 12, 14 block the working line 8a-f, whereby the safety valve or control valve 1 alone via the valve assembly FIG. 1 is controllable.
  • a first 4/2-way valve 16 and a second 4/2-way valve 18 serve as pilot control.
  • the two logic valves 12, 14 and the two 4/2 Directional valves 16, 18 are arranged together in and on a control plate 20 having a pump port P and a tank port T.
  • the two 4/2-way valves 16, 18 are shown in their biased by a spring basic or emergency position.
  • a respective closing surface 22, 24 which is effective in the closing direction of the valve body or main control piston of the logic valves 12, 14 is connected to the tank connection T via a relief line and thus relieved of pressure.
  • the discharge in particular if no tank connection is present or a tank connection is present but not used and is closed by a plug, via a check valve 21 a also to the cylinder chamber 4 or via a check valve 21 b to the cylinder chamber 6 take place, depending on in which cylinder chamber the lower pressure prevails.
  • FIG. 2 That would be the cylinder chamber 4.
  • the respectively effective in the opening direction annular surfaces A4 of the logic valves 12, 14 are alternatively from a pump port P forth via a first check valve 23a or from the cylinder chamber 6 forth via a second check valve 23b or from the cylinder chamber 4 ago a third check valve 23c is pressurized.
  • the valve body or main control piston of the two logic valves 12, 14 are lifted and the working line 8a-f released.
  • the two cylinder chambers 4, 6 of the Gleichgangzylinders 2 are connected and the valve body of the safety valve or control valve 1 can in the in FIG. 2 shown position to be opened.
  • the surfaces 22 are pressurized and the surfaces A4 relieved of pressure.
  • the logic valves are shown together with their pilot control in the rest position, which they occupy when there is no pressure in the system.
  • the pilot valves 16 and 18 are thus - unlike the main stages - arranged in parallel with respect to their pressure and in terms of their tank connection and therefore can independently control their main stages.
  • the 4/2 way valves 16 and 18 may also be designed as 4/2 way seat valves. Then a leakage oil flow on the feedforward is not available or very small.
  • 4/2 way seat valves are known for example from the data sheet RD 22058 / 07.09, page 5/14 Bosch Rexroth AG
  • the tank connection T omitted or unused and clogged.
  • the pressure port P together with the check valve 25a may be omitted or clogged by dispensing with the provision of a check valve.
  • the cylinder chamber 6 is pressurized.
  • the pressure in the cylinder chamber 4 is lower than in the cylinder chamber 6.
  • the check valves 25b and 25c and 21 a and 21 b would not be necessary.
  • the respective pressure connection of the two pilot valves 16 and 18 could be connected directly only to the cylinder chamber 6 and the respective discharge connection directly to the cylinder chamber 4. This is also possible if as in FIG. 2 shown the tank port T and the pressure port P with check valve 25a available. In the cylinder chamber 4 would then prevail the same pressure as in the tank connection T.
  • the pressure at the pressure port P would usually be lower than in the cylinder chamber 6, so that the check valve 25 a is closed.
  • check valves 21 a, 21 b, 25 b and 25 c are as out FIG. 2 shown present, so with respect to the connected to the cylinder chambers of the actuating cylinder 2 working connections of the control plate 20 is reversed arrangement of the control plate possible.
  • pressure port P and tank port T would have to be properly connected to the other components of the system.
  • the interchangeability increases flexibility and means increased installation and functional safety.
  • FIG. 3 shows the logic valve 12/14 with the pilot valve 16/18 according to FIG. 2 in an enlarged view and with additional details. This arrangement is also repeatedly installed in the following embodiments.
  • the logic valve 12/14 is an active logic valve 12/14, the main control piston acting in the opening direction and independently of the pressure at one of the terminals A and B pressurizable annular surface or active area A4 and the closing direction in the effective closing surface 22 / 24 has.
  • a seal 38 is arranged to delimit the two adjacent spaces in which there are different pressures both in normal operation and in emergency operation.
  • the active area A4 of the logic valve 12 is also advantageous for the initiation of an emergency operation, since the opening stroke of the logic valve 12 starts at the same time with the opening stroke of the logic valve 14 and not only after a small opening stroke of the logic valve 14, the leads to a pressure build-up in the line section 8d.
  • the valve body of the pilot valve 16/18 and the main control piston of the active logic valve 12/14 are position monitored via a respective limit switch 40 and 42, respectively.
  • the limit switch 40 detects whether the valve body of a pilot valve has reached its switched position.
  • the limit switch 42 detects whether the piston of the main stage of a logic valve has reached its open end position. It can also in each case a second limit switch may be provided in order to detect both end positions in each case. In FIG. 3 is such a second limit switch 43 located, with which the closed position of the main stage of the logic valve is monitored.
  • a continuous path detection can be provided so that different open end positions can be detected without mechanical adjustment of a limit switch.
  • FIG. 4 shows a circuit diagram of a second embodiment of a safety circuit according to the invention.
  • a valve body of a safety valve or control valve 101 is kept closed during normal operation, in this embodiment, the vapor pressure of the system (not shown) acts in the closing direction supportive. According to the embodiment according to FIG. 2 Thus, the flow direction of the steam through the valve is reversed.
  • the first cylinder chamber 4 of the synchronizing cylinder 2 can be connected via a first working line to the pressure port P of a control plate 120.
  • the first working line is divided into sections 108a, 108b, 108c, 108d, 108e and 108f. Between the two sections 108e and 108d, a first logic valve 12 is arranged, while a second logic valve 14 is arranged between the two sections 108d and 108c.
  • the second cylinder chamber 6 of the Gleichgangzylinders 2 is connected via a second working line to the tank port T of the control plate 120.
  • the second working line is divided into sections 110a, 110b, 110c, 110d, 110e and 110f.
  • a third logic valve 15 is arranged, while a fourth logic valve 13 is arranged between the two sections 110d and 110e. All logic valves are active logic with an in FIG. 3 with A4 designated annular surface on the piston, which acts on pressure in the opening direction.
  • the logic valve 12 is controlled by a 4/2 way valve 16
  • the logic valve 14 is controlled by a 4/2 way valve 18
  • the logic valve 15 is controlled by a 4/2 way valve 19
  • the logic valve 13 is piloted by a 4/2 way valve 17.
  • the logic valves 12, 13, 14 and 15 and the 4/2-way valves 16, 17, 18 and 19 are the same as those in the first embodiment FIG. 2 existing logic valves and pilot valves and operate in the same way.
  • the logic valves 12 to 15 are shown in their closed position, it being understood that the electromagnets of the pilot valves 16 to 19 are energized and the pilot valves different from those in the FIG. 4 shown occupy their switched position in which the surfaces 22/24 (see FIG. 3 ) and the areas A4 / (see FIG. 3 ) are relieved of pressure.
  • the fitting 101 takes the in FIG. 4 shown closed normal position.
  • the four 4/2-way valves 16 to 19 after switching off the electromagnets by a respective spring in their in FIG. 4 shown basic or emergency position, whereby the valve body of the logic valves are lifted from their valve seats. Thereby, the first working line 108a-f and the second working line 110a-f are released.
  • a pressure medium supply from the pressure accumulator 126 held at a certain pressure can flow via the pressure port P and via the first working line 108a-f into the first cylinder chamber 4, while a corresponding amount of pressure medium from the second cylinder chamber 6 via the second working line 110a-f and the tank port T flows to a tank, not shown.
  • the piston and the piston rod of the adjusting cylinder 2 are moved in the sense of an enlargement of the cylinder chamber 4 and a reduction of the cylinder chamber 6 and lift the valve body of the safety valve or regulating valve 101 from its valve seat. Steam can escape from the steam-carrying system, not shown, according to the two arrows.
  • the first working line 108a-f is thus used in emergency mode as a supply line, while the second working line 110a-f serves as a return line.
  • the first cylinder chamber 4 can be supplied in emergency operation via the first working line 108a-f from the pressure accumulator 126, which is charged during normal operation of the safety circuit to a certain pressure.
  • the valve must be opened quickly completely. This is done by means of the logic valves 12 to 15. In this case, the rapid movement of the valve is provided in the emergency position provided even if the proportional valve 26 or the switching valve off FIG. 1 receives a signal that counteracts the placement of the valve in the emergency position. Because the flow cross sections of the logic valves are compared to the flow cross sections in the valves 25 so large that the logic valves override the valve 26.
  • FIG. 5 shows a section of a third embodiment of the safety circuit according to the invention.
  • the safety valve or control valve 1 as in the first embodiment is shown to be actuated against the vapor pressure in the direction to close and to be opened in emergency operation with vapor assist.
  • first cylinder chamber 204 is a piston rod side cylinder space
  • second cylinder chamber 206 is a bottom-side cylinder chamber
  • the piston of the differential cylinder 202 is operatively connected to a position sensor 21 which detects each position of the piston.
  • the third embodiment of the safety circuit according to the invention with respect to the lines, the control plate with the valves and the pressure accumulator according to the second embodiment according to FIG. 4 , Accordingly, the first cylinder clamp 204 is connected to the pressure port P of the control plate 120 via the first working line 108a-f, while the second cylinder chamber 206 is connected to the tank port T of the control plate 120 via the second working line 110a-f. Of these two working lines, only a part of the first section 108a or 110a is shown in each case.
  • FIG. 6 shows the safety valve or regulating valve 101 with a flow according to the second embodiment (see. FIG. 4 ), whereby to its adjustment the differential cylinder 202 according to the third embodiment (see. FIG. 5 ) is used.
  • the fourth embodiment of the safety circuit according to the invention with respect to the lines, the control plate with the valves and the pressure accumulator according to the second embodiment according to FIG. 4 , Accordingly, the first cylinder chamber 204 is connected to the pressure port P of the control plate 120 via the first working line 108a-f, while the second cylinder chamber 206 is connected to the tank port T of the control plate 120 via the second working line 110a-f. Of these two working lines, only a part of the first section 108a or 110a is shown in each case.
  • the safety valve or control valve 1 as in the second embodiment flows through the steam so that it is operated against the vapor pressure in the direction of opening and closed in emergency operation with steam support.
  • the first cylinder chamber 204 via the first working line 108a-f pressure medium -. B. from the pressure accumulator 126 -. This opens the safety valve or control valve 101 against the vapor pressure. From the second cylinder chamber 206 pressure medium is displaced.
  • FIG. 7 shows a circuit diagram of a fifth embodiment of the safety circuit according to the invention.
  • a valve body of a safety valve or control valve 401 is shown according to a normal operation in its normal position in which it shuts off steam of a system not shown in detail.
  • the valve body in an emergency operation via the synchronous cylinder 2 by pressurizing a first cylinder chamber 4 - FIG. 7 viewed - are moved to the right according to the arrow above the synchronous cylinder.
  • the purpose of a first working line of a control plate 420 which can connect a pressure port P with the first cylinder chamber 4 via two logic valves 12, 14 connected in series according to the invention.
  • the thereby displaced from the second cylinder chamber 6 pressure fluid flows through a second working line to a tank port T of Control plate 420, wherein two erfindunlic to each other in series logic valves 15, 13 are arranged in the second working line.
  • the first working line is composed of the line sections 408a, 408b, 408c, 408d, 408e, 408f, 408g, 408h and 408i.
  • the second working line is composed of the line sections 410a, 410b, 410c, 410d, 410e, 410f and 410g.
  • the first logic valve 12 is arranged between the line sections 408e and 408f, while the second logic valve 14 is arranged between the line sections 408b and 408c.
  • the first logic valve 13 is arranged, while between the line sections 410b and 410c, the second logic valve 15 is arranged.
  • the control plate 420 has two further logic valves 512, 513, which in the fifth embodiment according to FIG. 7 not needed. All logic valves are active logic.
  • the two first logic valves 12, 13 and the two second logic valves 14, 15 and the two logic valves 512, 513, which are not required in the fifth exemplary embodiment, are piloted in the manner known from the exemplary embodiments 1 and 2.
  • FIG. 8 shows a circuit diagram of a sixth embodiment of the safety circuit according to the invention.
  • the arrangement of the fifth embodiment is according to FIG. 7 used.
  • the function of the valve body of the safety valve or control valve 401 in emergency operation from the in FIG. 8 shown normal position not as in the embodiment according to FIG. 7 from left to right, but be adjusted according to the arrow above the synchronizing cylinder 2 from right to left.
  • the second cylinder chamber 6 of the Gleichgangzylinders 2 via a - modified compared to the fifth embodiment, second working line to the pressure port P of the control plate 420, while the first cylinder chamber 4 of the Gleichgangzylinders 2 via a relative to the fifth embodiment modified, first working line to the tank port T. is relieved.
  • the line sections 408a, 408b, 408c, 408d, 508e, 508f, 508g serve as the first working line
  • the line sections 410a, 410b, 410c, 410d, 510e, 510f, 510g serve as the second working line.
  • two logic valves 512, 14 connected in series with one another are arranged in the first working line.
  • the first logic valve 512 is arranged between the line sections 508e and 508f
  • the second logic valve 14 is arranged between the line sections 408b and 408c.
  • the first logic valve 513 is arranged between the line sections 510e and 510f, while the second thereto according to the invention connected in series logic valve 15 between the line sections 410b and 410c is arranged.
  • the two logic valves according to the fifth embodiment FIG. 7 when the first two logic valves 12, 13 are used, are in the sixth embodiment according to FIG. 8 not used or used.
  • control plate 420 with the total of six pilot operated logic valves 12, 13, 14, 15, 512, 513 for normal operation and the emergency operation of the safety valve or control valve 401 both when this is in emergency operation from the center position according to the fifth embodiment is to be adjusted in the one direction, as well as when the valve 401 is to be adjusted according to the sixth embodiment in the opposite direction.
  • the desired direction of movement of course, so that there is no short circuit between the pressure port P and the tank port T of the control plate 420, one of the two valves 12 and 512 or 13 and 513 remain closed in an emergency at least until the valve body of the fitting 401 has released a vapor stream.
  • the two logic 12 and 512 as well as the two logic 13 and 513 differ in terms of their feedforward.
  • the pilot valves of the logic valves 12, 13, 14 and 15 are energized and then the logic valves 12 to 15 are closed.
  • the logic valves 12 to 15 are open.
  • pilot valves of the logic valves 512 and 513 are not energized in normal operation. In case of an emergency, they are then functioning according to FIG. 7 to leave the pilot valve of the logic valves 512 and 513 de-energized and in the operation according to FIG. 8 the pilot valves of the logic valves 512 and 513 to energize and the pilot valves of the logic valves 12 and 13 are energized.
  • a plurality of control plates 20; 120; 420 for equal or different thresholds on the cylinder 2; 202 be provided and connected.
  • the safety circuits according to the invention can also serve, in normal operation, the safety valve or control valve 1; 101; 401 open and close it in emergency mode.
  • An open position may be located at an intermediate position between the closed position and the 100% open position by means of stroke limitation for the valve piston of the main stage.
  • This intermediate position corresponds to a measured value greater than 0 and less than 100% as the voltage or current of an analog position encoder, which can be used to detect the intermediate positions without mechanical adjustment.
  • FIG. 1 shown part of the drive ineffective.
  • the proportional valve 26 and in particular the seat valve 36 are de-energized (see the in FIG. 1 positions shown).
  • one of two logic valves arranged in series with one another is first opened by means of a programmable logic controller, not shown, by changing the energization of the electromagnet of the associated 4/2-way valve 16.
  • this logic valve is closed again and the logic valve connected in series via the associated 4/2-way valve 18 is opened.
  • control oil is at least in the embodiments of the Figures 2 and 4 taken from a cylinder space of the adjusting cylinder 2, provided that the pressure therein is higher than the pressure at the pressure port P of the control plate. According to the embodiment FIG. 2 each results in a low oil loss in the pressurized cylinder chamber 4 of the actuating cylinder 2 to the fact that the valve body of the control valve 1 is either relieved, but not opened or leaves its position slightly.
  • the hydraulic drive according to the invention is designed as a tuned and closed system.
  • the drive path for the proportional valve 26 is transferred again to the programmable logic controller.
  • the control deviations of the proportional valve 26 can be evaluated and compared with the position monitoring of the valve, so that the control function is monitored.

Claims (12)

  1. Entraînement hydraulique ou pneumatique, en particulier pour l'actionnement d'un appareil de robinetterie comportant une soupape de réglage ou de commande (1; 101; 401) par exemple dans une centrale thermique ou dans une installation chimique ou une installation de transport de gaz ou de pétrole, avec un cylindre de réglage (2; 202), qui présente une chambre de cylindre (4; 204) qui est raccordée à une conduite hydraulique ou pneumatique (8a-f; 108a-f; 408a-i), et avec un circuit de sécurité qui présente deux soupapes d'arrêt montées en série l'une par rapport à l'autre et disposées dans la conduite, caractérisé en ce que les deux soupapes d'arrêt sont une première soupape de montage à 2/2 voies (12) et une deuxième soupape de montage à 2/2 voies (14), qui fluidiquement parlant est disposée plus près de la chambre de cylindre (4, 204) que la première soupape de montage à 2/2 voies (12), avec chaque fois un piston de commande principal, avec lequel la liaison fluidique entre deux raccords de travail respectifs (A, B) peut être réglée, dans lequel les deux soupapes de montage à 2/2 voies (12, 14) comprennent chacune une soupape de commande pilote (16, 18), et dans lequel au moins la première soupape de montage à 2/2 voies (12) présente une face (A4) active dans le sens de l'ouverture, qui peut être soumise à une pression via la soupape de commande pilote (16) indépendamment des raccords de travail (A, B).
  2. Entraînement hydraulique ou pneumatique selon la revendication 1, dans lequel les soupapes de commande pilotes (16, 18) des deux soupapes de montage à 2/2 voies sont disposées en parallèle l'une à l'autre avec leurs raccords reliés à une source de fluide sous pression et à un puits de fluide sous pression.
  3. Entraînement hydraulique ou pneumatique selon la revendication 1 ou 2, dans lequel le cylindre de réglage est un cylindre à course égale (2) avec une première chambre de cylindre (4) et avec une deuxième chambre de cylindre (6) et dans lequel la conduite (8a-f) s'étend entre les deux chambres de cylindre (4, 6).
  4. Entraînement hydraulique ou pneumatique selon la revendication 1 ou 2, dans lequel le cylindre de réglage (2; 202) est à double action et comporte une première chambre de cylindre (4, 204) à laquelle une première conduite (8a-f; 108a-f; 408a-i) est raccordée et un premier circuit de sécurité avec deux soupapes de montage à 2/2 voies (12, 14), et une deuxième chambre de cylindre (6; 206) à laquelle une deuxième conduite hydraulique ou pneumatique (110a-f; 410a-g) est raccordée, et dans lequel il se trouve un deuxième circuit de sécurité qui présente une troisième soupape de montage à 2/2 voies (13) et une quatrième soupape de montage à 2/2 voies (15) montée en série avec celle-ci, qui est fluidiquement parlant disposée plus près de la deuxième chambre de cylindre (6, 206) que la troisième soupape de montage à 2/2 voies (12), qui sont toutes les deux montées dans la deuxième conduite (110a-f; 410a-g) et qui comportent chacune un piston de commande principal, avec lequel la liaison fluidique entre deux raccords de travail respectifs (A, B) peut être réglée, et qui comprennent chacune une soupape de commande pilote (17, 19), dans lequel au moins la troisième soupape de montage à 2/2 voies (13) présente une face (A4) active dans le sens de l'ouverture, qui peut être soumise à une pression via la soupape de commande pilote associée (17) indépendamment des raccords de travail (A, B).
  5. Entraînement hydraulique ou pneumatique selon la revendication 4, dans lequel la troisième soupape de montage à 2/2 voies (13) et la quatrième soupape de montage à 2/2 voies (15) présentent respectivement une face (A4) active dans le sens de l'ouverture, qui peut être soumise à une pression via la soupape de commande pilote associée (17) indépendamment des raccords de travail (A, B).
  6. Entraînement hydraulique ou pneumatique selon la revendication 4 ou 5, dans lequel une première autre soupape de montage à 2/2 voies (512) est raccordée à la liaison fluidique entre la première soupape de montage à 2/2 voies (12) et la deuxième soupape de montage à 2/2 voies (14) avec un premier raccord de travail et une deuxième autre soupape de montage à 2/2 voies (513) est raccordée à la liaison entre la troisième soupape de montage à 2/2 voies (13) et la quatrième soupape de montage à 2/2 voies (15) avec un premier raccord de travail et dans lequel les autres soupapes de montage à 2/2 voies (512, 513) comprennent respectivement un piston de commande principal, avec lequel la liaison fluidique entre deux raccords de travail respectifs (A, B) peut être commandée, et respectivement une soupape de commande pilote et sont respectivement raccordées avec leur deuxième raccord de travail à un autre raccord (P, T) du circuit de sécurité respectif que la première ou la troisième soupape de montage à 2/2 voies (12, 13).
  7. Entraînement hydraulique ou pneumatique selon l'une quelconque des revendications précédentes, dans lequel les pistons de commande principaux des soupapes de montage à 2/2 voies (12, 14, 13, 15, 512, 513) font l'objet d'une surveillance de position en ce qui concerne leur position ouverte et de préférence aussi en ce qui concerne leur position fermée.
  8. Entraînement hydraulique ou pneumatique selon l'une quelconque des revendications précédentes, dans lequel les soupapes de commande pilotes (16, 17, 18, 19) comportent des corps de soupape mobiles dont on surveille la position.
  9. Entraînement hydraulique ou pneumatique selon l'une quelconque des revendications précédentes, dans lequel les pistons de commande principaux des soupapes de montage à 2/2 voies réglables activement comportent des joints d'étanchéité (38) pour l'étanchéité d'une chambre de commande agissant dans le sens de la fermeture par rapport à la chambre de commande agissant dans le sens de l'ouverture indépendamment des raccords de travail.
  10. Entraînement hydraulique ou pneumatique selon l'une quelconque des revendications précédentes, dans lequel les soupapes de commande pilotes sont des soupapes à siège à 4/2 voies (16, 17, 18, 19).
  11. Entraînement hydraulique ou pneumatique selon l'une quelconque des revendications précédentes, dans lequel toutes les soupapes de montage à 2/2 voies (12, 13, 14, 15; 512, 513) présentent une face (A4) active dans le sens de l'ouverture, qui peut être soumise à une pression via la soupape de commande pilote associée (16, 17, 18, 19) indépendamment des raccords de travail (A, B).
  12. Entraînement hydraulique ou pneumatique selon l'une quelconque des revendications précédentes, dans lequel un détecteur de position (21) est disposé sur un piston ou sur une tige de piston du cylindre de réglage (2; 202).
EP11782040.7A 2010-11-08 2011-10-20 Entraînement hydraulique ou pneumatique pour l'actionnement d'un appareil de robinetterie comportant une soupape de réglage ou de commande Active EP2638297B1 (fr)

Applications Claiming Priority (3)

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DE102010060432 2010-11-08
DE102011103222 2011-06-01
PCT/EP2011/005278 WO2012062404A1 (fr) 2010-11-08 2011-10-20 Entraînement hydraulique ou pneumatique pour l'actionnement d'un appareil de robinetterie comportant une soupape de réglage ou de commande

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US (1) US9528534B2 (fr)
EP (1) EP2638297B1 (fr)
JP (1) JP5710015B2 (fr)
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CN (1) CN103370546B (fr)
DE (1) DE102011116472A1 (fr)
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CN103370546B (zh) 2018-06-26
WO2012062404A1 (fr) 2012-05-18
DE102011116472A1 (de) 2012-05-10
US20140026747A1 (en) 2014-01-30
US9528534B2 (en) 2016-12-27
KR20140021987A (ko) 2014-02-21
JP2013543957A (ja) 2013-12-09
KR101901121B1 (ko) 2018-09-27
EP2638297A1 (fr) 2013-09-18
JP5710015B2 (ja) 2015-04-30
CN103370546A (zh) 2013-10-23

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