EP0631056B2 - Stellantrieb für ein Regelventil - Google Patents
Stellantrieb für ein Regelventil Download PDFInfo
- Publication number
- EP0631056B2 EP0631056B2 EP94108751A EP94108751A EP0631056B2 EP 0631056 B2 EP0631056 B2 EP 0631056B2 EP 94108751 A EP94108751 A EP 94108751A EP 94108751 A EP94108751 A EP 94108751A EP 0631056 B2 EP0631056 B2 EP 0631056B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- oil
- plate
- volume
- line
- 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
Links
Images
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
- 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
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/30—Application in turbines
- F05B2220/301—Application in turbines in steam turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S91/00—Motors: expansible chamber type
- Y10S91/03—Large area valve
Definitions
- the invention relates to an actuator for a control valve according to the preamble of the claim 1.
- An actuator for operating a control valve with which, for example, the steam supply to a Turbine of a power plant is regulated points one connected to the actuating rod of the control valve
- Main piston of a piston-cylinder arrangement on the one hand with spring force and on the other hand is pressurized with oil.
- Oil When it wears off Pressure of the main piston acting in the opening direction Oil, the spring force securely closes the control valve, which stops the steam supply. This ensures that the turbine is not gets out of control once the pressure of the oil should fall off.
- the invention seeks to remedy this.
- the invention as in the single Claim is characterized, solves the problem of an actuator for a control valve to create the dynamic with comparatively simple means Behavior can be improved and the secondary damage with great certainty avoids.
- This actuator for a control valve has one Control loop on which the actuator accordingly one from a higher-level plant control system sets the specified setpoint. He also has one main piston sliding in a master cylinder, with a controlled pressurized with oil Drive volume on one side of the main piston, and a plate valve upstream of the drive volume. It has proven to be particularly advantageous that the Plate valve with one connected to a drain device separate storage volume is provided. In this way, the plate valve can be placed anywhere in the area of the piston-cylinder arrangement of the Actuator are arranged.
- connection line is provided, which through a connector in a spring chamber of the plate valve flows into.
- FIG. 1 shows an actuator 1, which has a 30 gel valve 2 operated, which by a Hot steam line 3 to a turbine, not shown flowing hot steam regulates.
- the control valve 2 is through a valve stem 4 with one in one Master cylinder 5 sliding main piston 6 connected.
- 35 below the main piston 6 is an oil pressurized acted upon drive volume 7 arranged.
- the oil can also be another hydraulic fluid or a gaseous medium can be provided.
- An oil-filled buffer 40 is located above the main piston 6 volume 8 provided, in which also a spring 9 is arranged, which is the oil pressure in the drive volume 7 counteracts.
- the path measuring device 11 monitors the stroke of the main piston 6 and reports its Position continuously, as indicated by a line of action 40, to a position controller 33.
- the rod 10 and the valve stem 4 penetrate the master cylinder 5 opposite sides. The constructive execution of these pressure-tight penetrations is known and need not be described further here
- the path measuring device 11 can also be 55 rich outside of the master cylinder 5 directly on the Valve stem 4 are attached.
- the Plate valve 17 On the master cylinder 5 is in the front area Drive volume 7 connected to a connecting line 15 which has a comparatively large cross section and which has the drive volume 7 of Master cylinder 5 with a spatially separated from it arranged plate valve 17 connects.
- the Plate valve 17 is shown in more detail in Fig.la.
- the plate valve 17 has a housing 22, which on one side by a cover flange 22a is completed. This cover flange 22a surrounds an intermediate volume 24.
- A is in the cover flange 22a Drain connector 24a provided to which a line is connected the intermediate volume 24 with a Connected drain device for the oil, not shown.
- In this housing 22 is a connector 14 inserted pressure-tight.
- the plate valve 17 is on a connecting flange, not shown, of the connecting line 15 flanged that one end 14a of the Connection piece 14 pressure-tight with the connecting line 15 is connected.
- the tubular connector 14 has a cylindrical at the other end trained seal seat 14b.
- the plate valve 17 has one, for example with an aperture 70 provided, plate 18 on by a compression spring 19 against the sealing seat 14b and at the same time against a sealing part 23 embedded in the housing 22 is pressed. In the closed state it prevents Plate 18 in the exit of oil from the spring chamber 20 in a concentrically surrounding the connector 14 Volume 21. Volume 21 goes into the intermediate volume 24 about. Enclose these two volumes the spring chamber 20 and the sealing points of the plate valve 17 concentric.
- the one in the operating state shown spring chamber pressurized with oil 20 is against this by means of a spring chamber cover 20a Intermediate volume 24 completed.
- the plate 18 is designed so that jamming of the same is excluded is.
- the compression spring 19 is in one by one Bore 12 and an opening 13 pressurized with oil Spring chamber 20 arranged.
- the spring chamber 20 is about a thousand times the order of magnitude designed smaller than the drive volume 7, with to which he is in active connection.
- the spring chamber 20 stands also in operative connection with a via a line 47 Proportional directional control valve 25.
- a proportional directional control valve 25 for example the directly operated proportional directional valve with position control type KFDG 4V - 3/5, series 20, from the company Vickers Systems GmbH, D 6380 Bad Homburg v.d.H. be used.
- the proportional directional valve 25 has two actuating magnets 26, 27, which are not shown Return springs cooperate, and in In this case, three hydraulic connections 28, 29, 30 In Fig. 1, the proportional directional control valve 25 is in the so-called "Fail-safe" position shown.
- the proportional directional valve 25 has one with a slide of Valve connected stroke measurement 31, which the respective Position of the slide measures and, as by a line of action 32 indicated this information in a position controller 33 with an integrated power amplifier passes on.
- the actuating magnets 26, 27 receive as indicated by lines of action 34, 35, their Commands from this position controller 33 with integrated Power amplifier. Furthermore, the position controller 33 an input for feeding one like the Line of action 40 indicates from the path measuring device 11 supplied electrical signal.
- a position controller 33 can, for example, be a valve specifically for the proportional control valve 25 matched power amplifiers EEA-PAM-533-A, series 20, from Vickers Systems GmbH, D 6380 Bad Homburg v.d.H. used become.
- This position controller 33 cooperates with a higher-level controller 36, such as a line of action 37 implies.
- the controller 36 has further inputs 38 on what information and commands from one higher-level plant control technology, which covers the entire Power plant controls, be fed.
- Oil is fed in under pressure through a line 45, the necessary oil pressure is shown by a not shown Pump generated.
- the flow rate of the oil is in some special cases by a in the course the line 45 arranged aperture 46 limited to a maximum amount. As a rule, however Flow rate of the oil through a in the plate 18th of the plate valve 17 provided aperture 70 limited so that the aperture 46 can then be dispensed with.
- Line 45 leads to connection 28 of the proportional directional valve 25, which is not in the representation of FIG. 1 is connected to connection 29.
- the connection 29 is connected on the one hand to a line 47, which in turn is connected to the bore 12 in the Spring chamber 20 of the plate valve 17 leads, and on the other hand with a line 48 to a normally closed safety valve designed as a plate valve 49 leads.
- a line 51 branches from the line 50 and establishes the connection with the connection 30 of the proportional directional valve 25.
- the lines 50 and 51 are designed as bores in the housing 22, this is possible because both the proportional directional valve 25 as well as the safety valve 49 directly and flanged to the housing 22 in a pressure-tight manner, so that a monolithic valve block is created.
- From An intermediate nozzle 24a leads into an intermediate volume 24 Line leading to a drain device, not shown. The oil passes on from this drain device by the pump mentioned back into line 45.
- the safety valve 49 is designed as a plate valve with a cylinder 53, one from a safety oil circuit forth through a line 54 with oil under pressure acted volume 55, which by a valve plate 56 is limited and with a valve spring 57, which the oil pressure acting on the valve plate 56 counteracts. From the schematic representation of the Safety valve 49 does not show that the valve plate 56 is designed so that it jams is impossible.
- Line 54 normally leads through a directional valve 58 and connects this with the volume 55.
- the directional valve 58 is through a Electromagnet 59 actuated.
- a line of action 60 indicates the path of the trigger command for the electromagnet 59 on.
- the Plate valve 17 in all systems regardless of Type of the respective master cylinder 5 are used can.
- the line 15 can usually be compared run briefly so that the oil-filled pipe volume accordingly the dynamic turns out small advantageously increased.
- Valves should be provided if this depends on the operational requirements forth, which are placed on the actuator 1, seems desirable.
- Proportional directional valve 25 by at least one electro-hydraulic Valve or by a combination to replace various electrohydraulic valves, the actuator or its dynamic behavior to adapt to the specified operating conditions.
- the actuator is therefore very versatile.
- the interaction of the position controller 33 with integrated power amplifier and the regulator 36 as common electronic control arrangement of a Control loop is particularly advantageous because the Position controller 33 specifically on the proportional directional valve 25 is adjusted so that no additional adjustments and adjustments are necessary.
- this electronic control arrangement is quite possible composed of other elements or theirs Function in a higher-level plant control system if, for example, the protection concept of Power plant would require this.
- the electronic Control arrangement are from the distance measuring device 11 and 31 originating from the stroke measurement Signals continuously along with at least one, specified by the higher-level plant control system Setpoint according to a given logic processed. Generated in the event of deviations from this setpoint this control arrangement correction signals which on the actuating magnets 26, 27 of the proportional directional valve 25 act and a corresponding reversal effect it.
- a breakthrough through the plate 18 has a cylindrical opening 66 on which is a conical extension connects.
- a ball 67 is supported by a spring 68, which against one connected to the plate 18 Bracket 69 supports, in this conical extension pressed and closes the opening 66.
- Through the opening 66 can put oil under pressure in the connector 14 and through this and further through the connecting line 15 flow into the drive volume 7 as soon as a pressure difference occurs that is large enough to achieve the Force of the spring 68 and that acting on the ball 67 To overcome oil pressure.
- Fig. 3 is similar to Fig. 2, except that in this In the event of a breakthrough with the opening 66 through the plate 18 is designed such that oil from the drive volume 7 forth through the connecting line 15 and through the connector 14 can flow into the spring chamber 20.
- a rigid aperture 70 which allows oil to flow in both directions.
- the cross section of the aperture 70 is considerably smaller here designed as that of the opening 66.
- Fig. 5 shows a plate 18 with two valve arrangements similar to that shown in Fig. 2, but in each other opposite directions if appropriate Allow differential pressure to allow oil to pass through.
- the opening 66 which from the drive volume 7 in the spring chamber 20 leads has a much larger cross section on than the second opening 66.
- Control valve 2 must be in operation can be closed comparatively quickly.
- the closing speed is normally in the range by 1 m / sec, however, as the opening speed are just speeds around 0.02 m / sec required. This speed information are guide values depending on the design of the power plant can also have significant deviations from these Statements occur.
- the actuator 1 can be compared little effort to the respective operating conditions should be adjusted 2 are moved in the opening direction, so through the position controller 33 the proportional directional valve 25 actuated, and it is controlled so that the diagram to the left of the position shown applies.
- the connections 28 and 29 are then connected through and oil under pressure flows from line 45 forth through the proportional directional control valve 25.
- control valve 2 should be from an open position quickly transferred to a closed state the proportional directional control valve 25 is reversed so that that's to the right of the drawn position standing scheme applies.
- the connections 29 and 30 are interconnected and oil from the spring chamber 20th flows out through line 47, through the proportional directional valve 25, through lines 51 and 50 further through the buffer volume 8 and the line 52 into the drain device.
- this flow process takes time only for a very short time, as soon as the pressure in the Spring chamber 20 is smaller than the pressure in the drive volume 7, the plate 18 against the pressure of the spring 19 after moved down and the oil from the drive volume 7 flow into the volume 21 and the intermediate volume 24 can and from there further into the drain device.
- the spring 9 presses the main piston 6 below and thus the oil from the drive volume 7 as long out until the end position of the control valve 2 is reached is.
- the oil flows out very much quickly since the one released by the plate valve 17 Cross section is comparatively large, so the flow process is not adversely affected by it.
- the execution of the plate 18 according to FIG. 5 allows also a small closing movement, for larger ones
- the stroke of the main piston 6 is also in this case It is necessary to open the plate valve 17.
- the proportional directional valve 25 is in Fig. 1 in the Center position shown. This is the position if, for example, the actuating magnets 26, 27 should not receive voltage due to a power failure. This position is reached by spring force from inside the proportional directional valve 25 provided springs ensured under all circumstances. In this position, the spring chamber 20 is through the lines 47, 51 and 50 relieved of pressure, so that Plate valve 17 opens, as already described, to a quick closing of the control valve 2 leads. This ensures that the control valve 2 Always closed even in the event of a malfunction is, so that under no circumstances damage to the operated turbine due to a defect in the actuator 1 can occur.
- the safety valve 49 normally prevents a pressure drop in line 48 towards the drain device. However, if the pressure in the safety oil circuit decreases, so does the pressure in volume 55 and the safety valve 49 is there regardless of that Position of the proportional directional valve 25, the line 48 free, so that the pressure from the spring chamber 20 of the Plate valve 17 can escape through the lines 47, 48 and 50, which, as already described, a rapid closing process of control valve 2 initiated becomes. This measure can also be used in everyone If the steam supply is shut off safely reach the turbine.
- the directional control valve 58 When trying to start up, it can happen that that the safety oil circuit is not yet under pressure is set, or not yet put under pressure can.
- the directional control valve 58 is installed, which enables once it is switched electromagnetically is drawn to the right of the Position shown scheme that oil under pressure from the line 45 forth through the line 61 and through the Actuate directional valve 58 through volume 55 can, whereby the safety valve 49 is closed becomes.
- the command route for the directional control valve 58 as he is indicated by the line of action 60, however, blocked as soon as it is switched to normal operation otherwise the safety oil circuit may have an effect no longer on the safety valve 49 is possible, so the protective function of this circuit would no longer be guaranteed.
- the pressurized spring chamber 20 and the Sealing points of the plate valve 17 are complete surrounded by low pressure volumes. Should oil fail under high pressure escape from the spring chamber 20, this escapes in the said volumes, so secondary damage can be avoided with great certainty.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
- Control Of Turbines (AREA)
Description
- Fig.1
- eine Prinzipskizze eines erfindungsgemässen Stellantriebes,
- Fig.1a
- ein Detail des erfindungsgemässen Stellantriebes gemäss Fig.1,
- Fig.2
- eine erste Ausgestaltung eines Details eines Plattenventils,
- Fig.3
- eine zweite Ausgestaltung eines Details eines Plattenventils,
- Fig.4
- eine dritte Ausgestaltung eines Details eines Plattenventils, und
- Fig. 5
- eine vierte Ausgestaltung eines Details eines 20 Plattenventils.
Claims (1)
- Stellantrieb (1) für ein Regelventil (2) mit einem Regelkreis, welcher den Stellantrieb (1) entsprechend einem von einer übergeordneten Anlagenleittechnik vorgegebenen Sollwert einstellt, mit einem in einem Hauptzylinder (5) gleitenden Hauptkolben (6), mit einem durch ein Proportional-Wegeventil (25) gesteuerten mit Öl unter Druck beaufschlagbaren Antriebsvolumen (7) auf einer Seite des Hauptkolbens (6) und mit einem zwischen dem Antriebsvolumen (7) und dem Proportional-Wegeventil (25) zwischengeschalteten Plattenventil (17), wobei das Plattenventil (17) eine Platte (18) aufweist, die durch eine Druckfeder (19) in einem Federraum (20) derart gegen einen Dichtungssitz (14b) gehalten ist, so dass das Antriebsvolumen (7) vom Federraum (20) getrennt ist,
dadurch gekennzeichnet,dass das Plattenventil (17) mit einem mit einer Ablaufvorrichtung (24a) verbundenen, vom Puffervolumen (8) des Stellantriebs (1) separaten Speichervolumen (21, 24) für aus dem Plattenventil (17) austretendes Öl versehen ist, unddass das separate Speichervolumen (21, 24) konzentrisch um den Federraum (20) des Plattenventils (17) herum angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4320937 | 1993-06-24 | ||
DE4320937A DE4320937A1 (de) | 1993-06-24 | 1993-06-24 | Stellantrieb für ein Regelventil |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0631056A1 EP0631056A1 (de) | 1994-12-28 |
EP0631056B1 EP0631056B1 (de) | 1996-05-01 |
EP0631056B2 true EP0631056B2 (de) | 1999-05-12 |
Family
ID=6491077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94108751A Expired - Lifetime EP0631056B2 (de) | 1993-06-24 | 1994-06-08 | Stellantrieb für ein Regelventil |
Country Status (5)
Country | Link |
---|---|
US (1) | US5467683A (de) |
EP (1) | EP0631056B2 (de) |
JP (1) | JPH07139307A (de) |
CN (1) | CN1102233A (de) |
DE (2) | DE4320937A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009009852A1 (de) | 2009-02-20 | 2010-08-26 | Alstom Technology Ltd. | Plattenablaufventil, insbesondere zum Beeinflussen des Ansteuerdrucks eines Regelventils |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59909685D1 (de) | 1999-01-14 | 2004-07-15 | Alstom Technology Ltd Baden | Plattenventil |
DE10058560A1 (de) * | 2000-11-24 | 2002-06-13 | Voith Turbo Kg | Elektrohydraulischer Stellantrieb |
US7137407B2 (en) * | 2005-02-22 | 2006-11-21 | Emerson Process Management Power & Water Solutions, Inc. | Trip manifold |
CN100393985C (zh) * | 2006-10-13 | 2008-06-11 | 成都发动机(集团)有限公司 | 精确调节顶压和紧急全关静叶的调节机构 |
CN102615264A (zh) * | 2012-03-28 | 2012-08-01 | 蚌埠市华艺压铸机制造有限责任公司 | 压铸机升降阀板增压截止阀 |
CN107842642B (zh) * | 2017-12-12 | 2024-04-02 | 大连亨利测控仪表工程有限公司 | 高效能切断型单作用气动执行机构 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD263801A1 (de) † | 1987-06-09 | 1989-01-11 | Goerlitzer Maschinenbau Veb | Hydraulische schaltung fuer entnahme- oder anzapf-schnellschlussventile von dampfturbinen |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2204270A (en) * | 1938-04-29 | 1940-06-11 | Watson Stillman Co | Surge valve for hydraulic presses |
CA1038260A (en) * | 1974-05-14 | 1978-09-12 | Westinghouse Electric Corporation | Positive closure system for free floating disc valve |
EP0127027B1 (de) * | 1983-05-30 | 1988-03-09 | BBC Brown Boveri AG | Elektrohydraulischer Stellantrieb für Turbinenventile |
CH666132A5 (de) * | 1984-07-20 | 1988-06-30 | Bbc Brown Boveri & Cie | Einrichtung zur ueberwachung von physikalischen groessen an anlagen. |
US5137253A (en) * | 1989-12-01 | 1992-08-11 | Asea Brown Boveri Ltd. | Actuator |
-
1993
- 1993-06-24 DE DE4320937A patent/DE4320937A1/de not_active Withdrawn
-
1994
- 1994-06-02 US US08/253,250 patent/US5467683A/en not_active Expired - Lifetime
- 1994-06-08 DE DE59400247T patent/DE59400247D1/de not_active Expired - Lifetime
- 1994-06-08 EP EP94108751A patent/EP0631056B2/de not_active Expired - Lifetime
- 1994-06-23 JP JP6141948A patent/JPH07139307A/ja not_active Withdrawn
- 1994-06-24 CN CN94107226A patent/CN1102233A/zh active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD263801A1 (de) † | 1987-06-09 | 1989-01-11 | Goerlitzer Maschinenbau Veb | Hydraulische schaltung fuer entnahme- oder anzapf-schnellschlussventile von dampfturbinen |
Non-Patent Citations (1)
Title |
---|
K. Speicher, "Einheitsregelung für mittlere und grosse Dampfturbinen", Energietechnik, (14), Heft 8, August 1964 † |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009009852A1 (de) | 2009-02-20 | 2010-08-26 | Alstom Technology Ltd. | Plattenablaufventil, insbesondere zum Beeinflussen des Ansteuerdrucks eines Regelventils |
DE102009009852B4 (de) | 2009-02-20 | 2023-07-06 | General Electric Technology Gmbh | Plattenablaufventil, insbesondere zum Beeinflussen des Ansteuerdrucks eines Regelventils |
Also Published As
Publication number | Publication date |
---|---|
DE4320937A1 (de) | 1995-01-05 |
EP0631056B1 (de) | 1996-05-01 |
EP0631056A1 (de) | 1994-12-28 |
DE59400247D1 (de) | 1996-06-05 |
CN1102233A (zh) | 1995-05-03 |
US5467683A (en) | 1995-11-21 |
JPH07139307A (ja) | 1995-05-30 |
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