WO2017072880A1 - 弁装置、蒸気タービン設備 - Google Patents
弁装置、蒸気タービン設備 Download PDFInfo
- Publication number
- WO2017072880A1 WO2017072880A1 PCT/JP2015/080387 JP2015080387W WO2017072880A1 WO 2017072880 A1 WO2017072880 A1 WO 2017072880A1 JP 2015080387 W JP2015080387 W JP 2015080387W WO 2017072880 A1 WO2017072880 A1 WO 2017072880A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- steam
- steam turbine
- valve body
- flow path
- 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.)
- Ceased
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/18—Final actuators arranged in stator parts varying effective number of nozzles or guide conduits, e.g. sequentially operable valves for steam turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/14—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle
- F16K11/16—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle which only slides, or only turns, or only swings in one plane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/528—Mechanical actuating means with crank, eccentric, or cam with pin and slot
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
- G05D7/0641—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means using a plurality of throttling means
- G05D7/0647—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means using a plurality of throttling means the plurality of throttling means being arranged in series
Definitions
- the present invention relates to a valve device and a steam turbine facility.
- the steam turbine is used for machine driving and the like, and includes a turbine body having a rotor that is rotatably supported. The rotor is driven to rotate by supplying steam as a working fluid to the turbine body. Steam supplied to the turbine body or steam extracted from the turbine body flows through the steam flow path of the steam turbine. An adjustment valve is provided in the steam channel. The flow rate of the steam supplied to the turbine main body can be adjusted by adjusting the opening of the adjusting valve.
- Patent Document 1 a steam turbine provided with an overload valve in addition to the above regulating valve is also known (see Patent Document 1 below).
- an overload valve is provided on a bypass pipe branched from a main steam pipe. It is said that the main steam can be supplied to the intermediate stage of the high-pressure turbine by opening this overload valve.
- the present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide a valve device and a steam turbine facility that have a simple structure but sufficient efficiency.
- the valve device is provided on the steam flow path that guides the steam to the steam turbine and adjusts the open / closed state of the steam flow path, and on the steam flow path, A first valve seat that is provided in series with the main steam valve and exposed in the steam channel, and adjusts a flow state of the steam channel by contacting and separating from the first valve seat.
- a regulating valve having a first valve body, provided between the main steam valve and the regulating valve in the steam flow path, and a branch flow path connecting the steam turbine and exposed to the branch flow path
- An overload valve having a second valve body, a second valve body that adjusts a flow state of the branch flow path by contacting and separating from the second valve seat, the first valve body, and the As a common drive source for the second valve body, these first valve body, and a drive unit that drives the second valve body to work together, Provided.
- the first valve body and the second valve body can be interlocked by the drive unit that is a common drive source.
- the structure of an apparatus can be simplified.
- the valve device is configured such that the second valve of the overload valve is driven until the regulating valve is fully opened by driving the first valve body. You may provide the delay interlocking
- the drive of the overload valve is delayed by the delay interlocking unit until the adjustment valve is fully opened. Thereby, the apparatus can be operated in an overload state.
- the steam turbine has a plurality of pressure stages arranged from a high pressure side toward a low pressure side, and the steam flow path is
- the steam turbine may be connected to the pressure stage on the highest pressure side of the steam turbine, and the branch channel may be connected to the second and subsequent pressure stages in the steam turbine.
- the branch flow path is connected to the pressure stage on the high pressure side of the steam turbine, in addition to the supply amount from the steam flow path, steam is also supplied from the branch flow path,
- the output of the steam turbine can be further improved. That is, the steam turbine can be operated in an overloaded state.
- the flow guide is provided between the overload valve and the pressure stage and changes a flow direction of the steam that has passed through the overload valve. You may have.
- the flow direction of the steam that has passed through the overload valve can be changed by providing the flow guide. That is, the possibility that steam is unevenly distributed in the pressure stage of the steam turbine can be reduced.
- the flow guide has a guide body extending in a circumferential direction of the steam turbine, and the guide body is directed from the high pressure side to the low pressure side. Accordingly, a slit extending from the outer peripheral side to the inner peripheral side of the steam turbine may be formed.
- the second valve body of the overload valve may include one of the steam in the branch flow path.
- a through hole through which the part is circulated may be formed.
- a steam turbine facility includes the valve device according to any one of the first to sixth aspects, and a steam turbine driven by steam guided through the valve device. Prepare.
- a steam turbine facility 80 as a power generation system includes a high-pressure steam turbine 83 and a low-pressure steam turbine 84, and a boiler 85 that supplies high-pressure steam to the high-pressure steam turbine 83. And a generator 87 driven by the rotational driving force of the steam turbine 81.
- the high-pressure steam turbine 83 and the low-pressure steam turbine 84 each have a plurality of pressure stages arranged from the high-pressure side toward the low-pressure side. Among these, a steam flow path S through which steam flows from the boiler 85 is connected to the pressure stage on the highest pressure side (inlet side) of the high pressure steam turbine 83.
- a main steam valve 1 TTV
- a composite valve 2 valve device
- the composite valve 2 mainly has a regulating valve 21 and an overload valve 22.
- the overload valve 22 is provided on the branch flow path S2 that branches from between the main steam valve 1 and the regulating valve 21 on the steam flow path S.
- the downstream end of the branch flow path S ⁇ b> 2 is connected to the second and subsequent pressure stages (pressure stage on the high pressure side) in the high pressure steam turbine 83 of the steam turbine 81.
- FIG. 2 is a diagram showing a configuration of the composite valve 2 according to the present embodiment.
- the regulating valve 21 and the overload valve 22 are accommodated in the same valve chamber 18. More specifically, the composite valve 2 includes a regulating valve 21, an overload valve 22, a valve body holder 10 (delay interlocking unit), a valve rod 11, an arm 30, and a hydraulic cylinder 20. .
- the adjustment valve 21 has a first valve seat 12 exposed in the steam flow path S, and a first valve body 13 that contacts and separates from the first valve seat 12.
- the overload valve 22 has a second valve seat 14 exposed in the branch flow path S ⁇ b> 2 and a second valve body 15 that contacts and separates from the second valve seat 14. Further, the first valve body 13 of the adjusting valve 21 and the second valve body 15 of the overload valve 22 are held together by the valve body holder 10.
- the valve body holder 10 is a member that is formed in a thick plate shape and has a plurality of through holes 16 formed in the thickness direction. The first valve body 13 and the second valve body 15 are inserted into the respective through holes 16. Further, the first valve body 13, the second valve body 15, and the valve body holder 10 are accommodated in a valve chamber 18 defined by a valve case 17.
- the second valve body 15 is formed with a through-hole 19 that penetrates the second valve body 15 in the steam flow direction.
- the through hole 19 is opened even when the second valve body 15 is in contact with the second valve seat 14 (that is, the overload valve 22 is closed). That is, the steam in the branch flow path S ⁇ b> 2 is sent toward the downstream side of the overload valve 22 through the through hole 19.
- a valve stem 11 is connected to the valve body holder 10.
- the valve stem 11 moves the valve element holder 10 by moving back and forth inside the valve case 17.
- the end opposite to the valve element holder 10 is connected to the arm 30 via the arm connecting portion 12 ⁇ / b> C.
- the arm 30 is a rod-like member that is rotatable around a rotation shaft 90 provided in a part of the valve case 17.
- the arm connecting portion 12C is biased by the coil spring 40 from the upper side to the lower side. The urging force of the coil spring 40 is transmitted to the valve body holder 10, the first valve body 13, and the second valve body 15 via the valve rod 11.
- the rod of the hydraulic cylinder 20 (drive unit) is connected to the end of the arm 30 on the side opposite to the rotating shaft 90.
- the hydraulic cylinder 20 moves the rod forward and backward by hydraulic pressure.
- the end of the arm 30 rotates around the rotation shaft 90.
- the valve stem 11 is lifted upward, and the first valve body 13 and the second valve body 15 are separated from the first valve seat 12 and the second valve seat 14, respectively. That is, the regulating valve 21 and the overload valve 22 are opened.
- the first valve body 13 is inserted into the valve body holder 10 by extending from the first valve body main body 131 to a substantially disc-shaped first valve body main body 131 that contacts and separates from the first valve seat 12 and extends from the first valve body main body 131 to a rod shape.
- the first insertion part 132 and the first cap part 133 provided at the end of the first insertion part 132 opposite to the first valve body 131 are provided.
- the second valve body 15 includes a second valve body main body 151, a second insertion part 152, and a second cap part 153.
- the second valve body main body 151 is formed to have a slightly larger size than the first valve body main body 131.
- the dimension of the second insertion part 152 in the vertical direction is set larger than that of the first insertion part 132.
- the second valve body 15 is not separated from the second valve seat 14. It becomes. That is, even if the first valve body 13 is fully opened, the second valve body 15 is not immediately opened. In other words, the second valve body 15 is configured to interlock with the first valve body 13 with a delay. As a result, the overload valve 22 can be opened after the regulating valve 21 is fully opened.
- the steam supplied by opening the overload valve 22 in this way is supplied to the second and subsequent pressure stages of the steam turbine 81 (high-pressure steam turbine 83) through the branch flow path S2.
- the branch flow path S ⁇ b> 2 is only provided in a part of the circumferential direction of the steam turbine 81. For this reason, the steam supplied from the branch flow path S ⁇ b> 2 may be unevenly distributed in the circumferential direction of the steam turbine 81.
- FIG. 3 is a view showing only a pair of pressure stages adjacent to each other in the steam turbine 81.
- the steam turbine 81 includes a rotor R that rotates about an axis O, a plurality of moving blades 51 that are arranged at intervals in the circumferential direction along the outer peripheral surface of the rotor R, and a casing 60 that surrounds the rotor R from the outer peripheral side. And a plurality of stationary blades 52 arranged at intervals in the circumferential direction along the inner peripheral surface of the casing 60, and a flow guide 70 attached between the stationary blades 52 in the axis O direction. ing.
- Each stationary blade 52 is attached to the inner peripheral surface of the casing 60 in an annular shape along the inner periphery of the casing 60 and radially inward of the axis O with respect to the outer ring 521.
- a stationary blade body 522 and an inner ring 523 attached further radially inward of the stationary blade body 522.
- Each rotor blade 51 includes a platform 511 attached on the outer peripheral surface of the rotor R, a rotor blade body 512 attached to the platform 511 on the radially outer side of the axis O, and a further radial direction of the rotor blade body 512. And an outer shroud 513 attached to the outside.
- the pressure stage described above includes a plurality of stationary blades 52 arranged on the inner circumferential surface of the casing 60 of the steam turbine 81 at intervals in the circumferential direction, and a plurality of dynamic blades arranged downstream of the row of the stationary blades 52. It is comprised with the wing
- FIG. A flow guide 70 (guide body) is provided on the downstream side of the outer ring 521. The flow guide 70 connects the downstream end of the outer ring 521 and the upstream end of another outer ring 521 adjacent in the direction of the axis O, and has an annular shape extending along the circumferential direction of the axis O. It is a member to make.
- the flow guide 70 is formed with slits 71 extending along the circumferential direction of the axis O and penetrating from the radially outer side toward the radially inner side.
- the slit 71 is inclined so as to gradually go from the upstream side to the downstream side as it goes from the radially outer side to the radially inner side.
- an overload steam inlet 61 communicating with the above-described branch flow path S2 is formed in the casing 60 radially outside the axis O when viewed from the flow guide 70. That is, steam is supplied to the pressure stage in the middle of the steam turbine 81 through the overload steam inlet 61.
- the second valve body 15 in the overload valve 22 can be opened after the first valve body 13 in the regulating valve 21. Thereby, after the opening degree of the regulating valve 21 reaches 100%, the overload valve 22 can be opened to further increase the load of the steam turbine 81.
- the regulating valve 21 and the overload valve 22 are driven by a single hydraulic cylinder 20 that is a common drive source. Furthermore, the adjustment valve 21 and the overload valve 22 can be interlocked with each other only by providing the valve body holder 10 as a delay interlocking part. That is, since the configuration of the apparatus can be greatly simplified, manufacturing costs and maintenance costs can be greatly reduced.
- the flow guide 70 in which the slit 71 is formed is provided on the downstream side of the overload steam inlet 61. Therefore, steam from the outer peripheral side of the steam turbine 81 toward the inner peripheral side can be temporarily retained on the outer peripheral side of the slit 71. Thereafter, the vapor is made uniform in the circumferential direction and flows into the inner circumferential side of the slit 71. That is, uneven distribution of the steam in the steam turbine 81 in the circumferential direction can be reduced.
- steam is supplied into the steam turbine 81 from the branch flow path S2 through the through hole 16 of the second valve body 15 even when the overload valve 22 is closed. With this steam, the inside of the steam turbine 81 can be preheated.
- the valve case 17 is divided by the regulating valve 21 and the overload valve 22. That is, the regulating valve 21 includes the first valve body 13, the first valve seat 12, and the first valve case 17A.
- the overload valve 22 includes a second valve body 15, a second valve seat 14, and a second valve case 17B. Furthermore, a second valve rod 11B is attached to the second valve body 15. As shown in FIG. 4, the end of the second valve rod 11 ⁇ / b> B (the end opposite to the side on which the second valve body 15 is provided) is exposed to the outside of the overload valve 22.
- the first valve case 17A is provided with two arms 30 (a first arm 121 and a second arm 122) extending in two different directions around the rotation shaft 90.
- the end of the first arm 121 (the end opposite to the rotating shaft 90) is connected to the rod of the hydraulic cylinder 20 described above.
- the first valve body 13 of the adjustment valve 21 moves up and down in the same manner as in the first embodiment.
- the second arm 122 (delay interlocking portion) is a rod-like member that extends downward from the first arm 121 when viewed from the rotating shaft 90.
- the second arm 122 is provided integrally with the first arm 121. That is, when the first arm 121 rotates around the rotation axis 90, the second arm 122 also rotates around the rotation axis 90 accordingly.
- the end of the second arm 122 (the end opposite to the rotating shaft 90) is rotatably connected to the upper end of the second valve rod 11B to which the second valve body 15 is attached. Note that the second valve rod 11B is urged downward from above by a coil spring 40B, similarly to the first valve body 13 described above.
- a long hole H1 is formed at the upper end of the second valve rod 11B.
- the long hole H1 is a hole formed in an oval shape that is long in the extending direction of the second valve rod 11B.
- the end of the second valve rod 11B is connected to the elongated hole H1 through a pin P.
- the pin P can freely move in the vertical direction inside the long hole H1.
- the first arm 121 rotates upward about the rotation shaft 90, so that the first valve body 13 is separated from the first valve seat 12. Thereby, the regulating valve 21 is opened.
- the second arm 122 also rotates around the rotation axis 90, but the pin P connecting the second arm 122 and the second valve rod 11B extends along the elongated hole H1 formed in the second valve rod 11B. And only slides upward. For this reason, the second valve rod 11B does not move upward at this stage. That is, the overload valve 22 is in a closed state.
- the second valve body 15 in the overload valve 22 can be opened after the first valve body 13 in the regulating valve 21 as in the first embodiment. Thereby, after the opening degree of the regulating valve 21 reaches 100%, the overload valve 22 can be opened to further increase the load of the steam turbine 81.
- the regulating valve 21 and the overload valve 22 are driven by a single hydraulic cylinder 20 that is a common drive source. Furthermore, the adjustment valve 21 and the overload valve 22 can be interlocked only by providing the elongated hole H1 in the second valve rod 11B. That is, since the configuration of the apparatus can be greatly simplified, manufacturing costs and maintenance costs can be greatly reduced.
- the composite valve 2 in this embodiment is configured by connecting a regulating valve 21 and an overload valve 22 as independent valves.
- the adjustment valve 21 includes a first valve seat 12, a first valve body 13, a first valve rod 11, and a first lever 201.
- a substantially cylindrical sleeve 111 is attached to the upper part of the first valve rod 11.
- a cavity is formed in the inner peripheral region of the sleeve 111.
- a substantially rod-shaped spindle 112 that moves up and down integrally with the first lever 201 by being connected to the first lever 201 is provided in the cavity.
- the lower end portion of the spindle 112 is connected to the first lever 201. That is, as the first lever 201 rotates, the spindle 112 moves up and down in the area on the inner peripheral side of the sleeve 111.
- a hole for inserting the adjusting bolt 113 is formed on the upper end side of the sleeve 111.
- the adjustment bolt 113 has a part of its shaft portion exposed toward the inner region of the sleeve 111. Further, a gap d ⁇ b> 1 is formed between the lower end portion of the adjustment bolt 113 and the upper end portion of the spindle 112. The vertical dimension of the gap d1 can be changed by adjusting the screwing amount of the adjusting bolt 113.
- the overload valve 22 includes the second valve seat 14, the second valve body 15, the second valve rod 11 ⁇ / b> B, and the second lever 202.
- a substantially cylindrical sleeve 111B is attached to the upper part of the second valve rod 11B.
- a cavity is formed in a region on the inner peripheral side of the sleeve 111B.
- a substantially rod-shaped spindle 112 ⁇ / b> B that moves up and down integrally with the second lever 202 by being connected to the second lever 202 is provided in the cavity.
- the lower end portion of the spindle 112B is connected to the second lever 202. That is, as the second lever 202 rotates, the spindle 112B moves up and down in the region on the inner peripheral side of the sleeve 111B.
- a hole for inserting the adjusting bolt 113B is formed on the upper end side of the sleeve 111B.
- the adjustment bolt 113B has a part of its shaft portion exposed toward the inner region of the sleeve 111B.
- a gap d2 is formed between the lower end portion of the adjustment bolt 113B and the upper end portion of the spindle 112B.
- the vertical dimension of the gap d2 can be changed by adjusting the screwing amount of the adjustment bolt 113B.
- the vertical dimension of the gap d2 in the overload valve 22 is set larger than the vertical dimension of the gap d1 in the regulating valve 21 will be described.
- the first lever 201 and the second lever 202 are connected to the first valve rod 11 and the second valve rod 11B, respectively, and are rotated by a single drive unit such as the hydraulic cylinder 20 or the like. As the first lever 201 and the second lever 202 rotate, the first valve rod 11 and the second valve rod 11B advance and retract in the vertical direction. More specifically, when the first lever 201 moves upward, first, the spindle 112 moves upward. At this time, the spindle 112 moves upward by a distance in the vertical direction of the gap d1, and then comes into contact with the shaft portion of the adjustment bolt 113.
- the spindle 112 After the spindle 112 comes into contact with the shaft portion of the adjustment bolt 113, the spindle 112 moves up the sleeve 111 and the first valve rod 11 via the adjustment bolt 113 because the first lever 201 still moves upward. Lift to. Thereby, the adjustment valve 21 will be in an open state.
- the gap d2 in the overload valve 22 is set to be larger than the gap d1 in the regulating valve 21. Therefore, when the first lever 201 and the second lever 202 are rotated by the same amount at the same timing, the second valve body 15 in the overload valve 22 is compared with the first valve body 13 in the adjustment valve 21. Thus, the gap d2 and the gap d1 are opened with a delay in the vertical dimension.
- the second valve body 15 in the overload valve 22 is delayed from the first valve body 13 in the regulating valve 21 in the open state as in the first embodiment or the second embodiment. can do. Thereby, after the opening degree of the regulating valve 21 reaches 100%, the overload valve 22 can be opened to further increase the load of the steam turbine 81.
- the regulating valve 21 and the overload valve 22 are driven by a single hydraulic cylinder 20 that is a common drive source.
- each of the regulating valves 21 includes one first valve seat 12 and one first valve body 13, and each of the overload valves 22 includes one second valve seat 14 and two second valve seats 14.
- the configuration including the valve body 15 has been described.
- the modes of the regulating valve 21 and the overload valve 22 are not limited to this. For example, it is good also as a structure provided with the some 1st valve seat 12 and the 1st valve body 13 which the adjustment valve 21 mutually spaces
- the overload valve 22 may be configured to include a plurality of second valve seats 14 and second valve bodies 15 that are spaced apart from and in contact with each other.
- the adjustment valve 21 may include a plurality of first valve seats 12 and first valve bodies 13, and the overload valve 22 may include a plurality of second valve seats 14 and second valve bodies 15.
- Low pressure steam turbine 85 ... Boiler 86 ... Reheater 87 ... Generator 111, 111B ... Sleeve 112, 112B ... Spindle 113, 113B ... Adjustment bolt 121 ... first arm 122 ... second arm 131 ... first valve body 132 ... first Insertion part 133 ... 1st cap part 151 ... 2nd valve body main body 152 ... 2nd insertion part 153 ... 2nd cap part 201 ... 1st lever 202 ... 2nd lever 511 ... Platform 512 ... Rotor blade body 513 ... Outer shroud 521 ... outer ring 522 ... stationary blade body 523 ... inner ring 11B ... second valve rod 12C ... arm connection part 40B ... coil springs d1, d2 ... gap H1 ... oblong hole H2 ... oblong hole O ... axis R ... rotor S ... steam flow path S2 ... Branch channel
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Turbines (AREA)
- Lift Valve (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
Description
本発明の第一の態様によれば、弁装置は、蒸気タービンに蒸気を導く蒸気流路上に設けられて、該蒸気流路の開閉状態を調整する主蒸気弁と、前記蒸気流路上で、前記主蒸気弁と直列に設けられて、前記蒸気流路中に露出した第1弁座、及び該第1弁座に対して当接・離間することで前記蒸気流路の流通状態を調整する第1弁体を有する調整弁と、前記蒸気流路における前記主蒸気弁及び前記調整弁の間と、前記蒸気タービンとを接続する分岐流路上に設けられて、該分岐流路中に露出した第2弁座、及び該第2弁座に対して当接・離間することで前記分岐流路の流通状態を調整する第2弁体を有する過負荷弁と、前記第1弁体、及び前記第2弁体の共通の駆動源として、これら第1弁体、及び第2弁体を連動するように駆動する駆動部と、を備える。
本発明の第一実施形態について、図面を参照して説明する。本実施形態に係る発電システムとしての蒸気タービン設備80は、図1に示すように、高圧蒸気タービン83、低圧蒸気タービン84を有する蒸気タービン81と、高圧蒸気を高圧蒸気タービン83に供給するボイラ85と、蒸気タービン81の回転駆動力により駆動される発電機87と、を備えている。
続いて、本発明の第二実施形態について、図4を参照して説明する。
本実施形態に係る複合弁2では、上記第一実施形態とは異なり、調整弁21と過負荷弁22とで、弁ケース17がそれぞれ分けられている。すなわち、調整弁21は、上述の第1弁体13と、第1弁座12と、第1弁ケース17Aと、を有している。過負荷弁22は、第2弁体15と、第2弁座14と、第2弁ケース17Bと、を有している。さらに、この第2弁体15には、第2弁棒11Bが取り付けられている。第2弁棒11Bは、図4に示すように、その端部(第2弁体15が設けられる側とは反対側の端部)が、過負荷弁22の外部に露出している。
次に、本発明の第三実施形態について図5を参照して説明する。同図に示すように、本実施形態における複合弁2は、独立弁としての調整弁21と過負荷弁22とを連結することで構成される。調整弁21は、第1弁座12と、第1弁体13と、第1弁棒11と、第1レバー201と、を有している。
なお、本実施形態では、過負荷弁22における間隙d2の上下方向における寸法は、調整弁21における間隙d1の上下方向における寸法よりも大きく設定された例について説明する。
なお、上記実施形態では、調整弁21はそれぞれ1つずつの第1弁座12、及び第1弁体13を備え、過負荷弁22はそれぞれ1つずつの第2弁座14、及び第2弁体15を備える構成について説明した。
しかしながら、調整弁21、及び過負荷弁22の態様はこれに限定されない。例えば、調整弁21がそれぞれ互いに対応して離間・当接する複数の第1弁座12、及び第1弁体13を備える構成としてもよい。同様に、過負荷弁22がそれぞれ互いに対応して離間・当接する複数の第2弁座14、及び第2弁体15を備える構成としてもよい。さらに、調整弁21が複数ずつの第1弁座12、第1弁体13を備えるとともに、過負荷弁22が複数ずつの第2弁座14、第2弁体15を備える構成としてもよい。
Claims (7)
- 蒸気タービンに蒸気を導く蒸気流路上に設けられて、該蒸気流路の開閉状態を調整する主蒸気弁と、
前記蒸気流路上で、前記主蒸気弁と直列に設けられて、前記蒸気流路中に露出した第1弁座、及び該第1弁座に対して当接・離間することで前記蒸気流路の流通状態を調整する第1弁体を有する調整弁と、
前記蒸気流路における前記主蒸気弁及び前記調整弁の間と、前記蒸気タービンとを接続する分岐流路上に設けられて、該分岐流路中に露出した第2弁座、及び該第2弁座に対して当接・離間することで前記分岐流路の流通状態を調整する第2弁体を有する過負荷弁と、
前記第1弁体、及び前記第2弁体の共通の駆動源としてこれら第1弁体、第2弁体が連動するように駆動する駆動部と、
を備える弁装置。 - 前記調整弁が全開状態となるまで、前記過負荷弁の前記第2弁体の駆動を遅延させる遅延連動部を備える請求項1に記載の弁装置。
- 前記蒸気タービンは、高圧側から低圧側に向かって配列された複数の圧力段を有し、
前記蒸気流路は、前記蒸気タービンの最も高圧側の前記圧力段に接続され、
前記分岐流路は、前記蒸気タービンにおける2段目以降の前記圧力段に接続されている請求項1又は2に記載の弁装置。 - 前記過負荷弁と前記圧力段との間に設けられて、前記過負荷弁を通過した蒸気の流通方向を変更するフローガイドを有する請求項3に記載の弁装置。
- 前記フローガイドは、前記蒸気タービンの周方向に延びるガイド本体を有し、
前記ガイド本体には、高圧側から低圧側に向かうにしたがって前記蒸気タービンの外周側から内周側に向かって延びるスリットが形成された請求項4に記載の弁装置。 - 前記過負荷弁の前記第2弁体には、前記分岐流路中の蒸気の一部を流通させる貫通孔が形成されている請求項1から5のいずれか一項に記載の弁装置。
- 請求項1から6のいずれか一項に記載の弁装置と、
前記弁装置を通じて導かれた蒸気によって駆動される蒸気タービンと、
を備える蒸気タービン設備。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/080387 WO2017072880A1 (ja) | 2015-10-28 | 2015-10-28 | 弁装置、蒸気タービン設備 |
| JP2017547252A JP6327775B2 (ja) | 2015-10-28 | 2015-10-28 | 弁装置、蒸気タービン設備 |
| EP15907244.6A EP3369976B1 (en) | 2015-10-28 | 2015-10-28 | Valve device and steam turbine equipment |
| US15/771,064 US10605114B2 (en) | 2015-10-28 | 2015-10-28 | Valve device and steam turbine equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/JP2015/080387 WO2017072880A1 (ja) | 2015-10-28 | 2015-10-28 | 弁装置、蒸気タービン設備 |
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| Country | Link |
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| US (1) | US10605114B2 (ja) |
| EP (1) | EP3369976B1 (ja) |
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| CN115899326A (zh) * | 2022-11-23 | 2023-04-04 | 杭州瑞能科技设备有限公司 | 一种用于超低温低压酯化蒸汽余热回收的速关调节一体阀 |
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| JP7216567B2 (ja) * | 2019-02-25 | 2023-02-01 | 三菱重工コンプレッサ株式会社 | 弁装置及び蒸気タービン |
| CN113700534A (zh) * | 2021-08-31 | 2021-11-26 | 中国船舶重工集团公司第七0三研究所 | 大功率船舶汽轮机外旁通汽缸 |
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| WO2014155579A1 (ja) * | 2013-03-27 | 2014-10-02 | 三菱重工コンプレッサ株式会社 | 多弁型蒸気弁及び蒸気タービン |
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| JP2013147937A (ja) * | 2012-01-17 | 2013-08-01 | Toshiba Corp | 蒸気タービン制御装置 |
| WO2014155579A1 (ja) * | 2013-03-27 | 2014-10-02 | 三菱重工コンプレッサ株式会社 | 多弁型蒸気弁及び蒸気タービン |
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| CN115899326A (zh) * | 2022-11-23 | 2023-04-04 | 杭州瑞能科技设备有限公司 | 一种用于超低温低压酯化蒸汽余热回收的速关调节一体阀 |
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| Publication number | Publication date |
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| JP6327775B2 (ja) | 2018-05-23 |
| JPWO2017072880A1 (ja) | 2018-03-08 |
| EP3369976A4 (en) | 2019-06-12 |
| EP3369976A1 (en) | 2018-09-05 |
| US20180306050A1 (en) | 2018-10-25 |
| EP3369976B1 (en) | 2020-12-02 |
| US10605114B2 (en) | 2020-03-31 |
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