CN216043913U - Main steam valve of low-parameter saturated steam turbine and actuating mechanism thereof - Google Patents
Main steam valve of low-parameter saturated steam turbine and actuating mechanism thereof Download PDFInfo
- Publication number
- CN216043913U CN216043913U CN202122474810.9U CN202122474810U CN216043913U CN 216043913 U CN216043913 U CN 216043913U CN 202122474810 U CN202122474810 U CN 202122474810U CN 216043913 U CN216043913 U CN 216043913U
- Authority
- CN
- China
- Prior art keywords
- valve
- main steam
- butterfly
- steam turbine
- plate
- 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
Links
Images
Landscapes
- Control Of Turbines (AREA)
Abstract
The utility model relates to a main steam valve of a low-parameter saturated steam turbine and an actuating mechanism thereof, belonging to the technical field of actuating mechanisms of steam turbines. The high-pressure oil cylinder and the spring cylinder are arranged at two ends of the limit switch, the hand wheel is arranged at the other end of the spring cylinder, and the main steam valve is of a butterfly valve structure and is arranged at the bottom of the limit switch; the main steam valve comprises a sealing ring, a pressing plate, a butterfly plate, a valve rod, a compression bolt and a valve body, the valve rod is installed at the center of the valve body, the butterfly plate is arranged on the outer side of the valve rod, the pressing plate is installed on the outer side of the butterfly plate and fixed through the compression bolt, the sealing ring is arranged between the pressing plate and a sealing surface of the valve body, and the pressing plate and the butterfly plate are located between the valve rod and the valve body. The utility model has the advantages of simple structure, safety, reliability, relatively low manufacturing cost, convenient installation, safety and reliability, and the like, and the executor is connected with the control oil of the steam turbine and has the advantages of 0.5 second quick closing, automatic activity test and the like.
Description
Technical Field
The utility model belongs to the technical field of steam turbine actuating mechanisms, and particularly relates to a main steam valve of a low-parameter saturated steam turbine and an actuating mechanism thereof.
Background
The automatic main steam valve of the steam turbine is a protective valve and is arranged on a steam inlet pipeline of the steam turbine or a cylinder, when the steam turbine needs to be shut down quickly in case of emergency, the automatic main steam valve is interlocked and quickly closed through safety oil and ETS signals, the steam inlet of the steam turbine is cut off, and the closing time is required to be less than 0.5 second. The automatic main steam valve requires close tightness and zero leakage. In order to avoid the jamming of the main steam valve, the main steam valve is required to be capable of performing a valve rod movement test during normal operation so as to ensure flexible action, safety and reliability, and the traditional automatic main steam valve is generally in a stop valve structure as shown in fig. 1.
The main steam parameters of the low-parameter saturated steam turbine are low-pressure saturated steam, the specific volume of the steam is large, the diameter of a steam inlet pipeline of the steam turbine is large, if a traditional automatic main steam valve is adopted, the size of the main steam valve is large, and the manufacturing difficulty and the manufacturing cost are high.
Therefore, it is necessary to provide a main steam valve of a low-parameter saturated steam turbine and an actuator thereof, which have the advantages of simple structure, safety, reliability, relatively low manufacturing cost and convenient installation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a main steam valve of a low-parameter saturated steam turbine and an actuating mechanism thereof, which have the advantages of simple structure, safety, reliability, relatively low manufacturing cost and convenience in installation, and aims to solve the problems that the main steam parameter of the low-parameter saturated steam turbine is low-pressure saturated steam, the specific volume of the steam is very large, the diameter of a steam inlet pipeline of the steam turbine is very large, and if a traditional automatic main steam valve is adopted, the size of the main steam valve is very large, and the manufacturing difficulty and the cost are high.
In order to realize the purpose, the utility model is realized by the following technical scheme:
the utility model provides a main steam valve of a low-parameter saturated steam turbine and an actuating mechanism thereof, comprising a main steam valve 8, a high-pressure oil cylinder 9, a limit switch 10, a spring cylinder 11 and a hand wheel 12; the high-pressure oil cylinder 9 and the spring cylinder 11 are arranged at two ends of the limit switch 10, the hand wheel 12 is arranged at the other end of the spring cylinder 11, and the main steam valve 8 is arranged at the bottom of the limit switch 10 in a butterfly valve structure; the main steam valve 8 include sealing washer 2, clamp plate 3, butterfly plate 4, valve rod 5, clamp bolt 6, valve body 7 center department install valve rod 5, the valve rod 5 outside sets up butterfly plate 4, clamp plate 3 is installed in the butterfly plate 4 outside, clamp plate 3 is fixed through clamp bolt 6, be provided with sealing washer 2 between clamp plate 3 and the sealed face 1 of valve body, clamp plate 3 and butterfly plate 4 are in between valve rod 5 and the valve body 7.
Preferably, the main steam valve 8 adopts a three-eccentric metal hard sealing butterfly valve structure.
The utility model has the beneficial effects that:
the utility model has the advantages of simple structure, safety, reliability, relatively low manufacturing cost, convenient installation, safety and reliability, and the like, and the executor is connected with the control oil of the steam turbine and has the advantages of 0.5 second quick closing, automatic activity test and the like.
Drawings
FIG. 1 is a schematic diagram of a conventional main steam valve;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the main steam valve of the present invention;
fig. 4 is a logic diagram of the operation of the present invention.
In the figure, 1-valve body sealing surface, 2-sealing ring, 3-pressing plate, 4-butterfly plate, 5-valve rod, 6-hold-down bolt, 7-valve body, 8-main steam valve, 9-high pressure oil cylinder, 10-limit switch, 11-spring cylinder, 12-hand wheel, 13-pressure oil, 14-safety oil, 15-return oil, 16-electromagnetic reversing valve, 17-quick-closing electromagnetic valve, 18-hydraulic control cartridge valve and 19-hydraulic control one-way valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding of the skilled person.
As shown in fig. 1-4, the main steam valve of the low-parameter saturated steam turbine and the actuating mechanism thereof comprise a main steam valve 8, a high-pressure oil cylinder 9, a limit switch 10, a spring cylinder 11 and a hand wheel 12; high-pressure cylinder 9 and spring cylinder 11 install the both ends at limit switch 10, hand wheel 12 is installed to the other end of spring cylinder 11, main steam valve 8 adopts the butterfly valve structure, install in limit switch 10 bottom, the major diameter can be realized under the less condition of valve body volume to the butterfly valve structure, manufacturing cost and manufacturing difficulty have been reduced, the butterfly valve structure chooses three eccentric metal hard seal butterfly valve structures for use, during three eccentric butterfly valve switches, it is little to sealed face wearing and tearing, the sealed face of case adopts metal composite material, valve body sealing face build-up welding alloy material, it is sealed effectual, long service life, the executor adopts high-pressure cylinder 9 oil accuse, insert the turbine control oil system, the oil pressure is opened, the spring is closed, guarantee the closure time is less than 0.5 seconds, hand wheel 12 combines spring cylinder 11 to carry out the control of high-pressure cylinder 9, limit switch 10 carries out the torsional spacing of spring cylinder 11.
The main steam valve 8 include sealing washer 2, clamp plate 3, butterfly plate 4, valve rod 5, clamp bolt 6, valve body 7 center department install valve rod 5, the valve rod 5 outside sets up butterfly plate 4, clamp plate 3 is installed in the butterfly plate 4 outside, clamp plate 3 is fixed through clamp bolt 6, be provided with sealing washer 2 between clamp plate 3 and the sealed face 1 of valve body, clamp plate 3 and butterfly plate 4 are in between valve rod 5 and the valve body 7, the sealed packing that adopts of valve rod 5 is sealed, sealed effectual, cancelled a pole steam leakage system.
When the steam turbine works, the actuator of the main steam valve 8 is respectively connected with steam turbine pressure oil 13, safety oil 14 and return oil 15, oil is fed from the right side of the oil cylinder through the electromagnetic directional valve 16, the spring force is overcome, the main steam valve 8 is opened, when the steam turbine breaks down, the pressure of the quick-closing electromagnetic valve 17 or the safety oil 14 is controlled to quickly drain oil through the quick-closing electromagnetic valve 18, the quick-closing electromagnetic valve is closed quickly by the spring, meanwhile, the oil is fed from the left side of the oil cylinder, the quick-closing is assisted, when the steam turbine normally runs, the valve activity test is automatically returned to 85% through the closing of the electromagnetic directional valve 16, and the hydraulic one-way valve 19 is arranged above the electromagnetic directional valve 16 to prevent backflow.
The utility model has the advantages of simple structure, safety, reliability, relatively low manufacturing cost, convenient installation, safety and reliability, and the like, and the executor is connected with the control oil of the steam turbine and has the advantages of 0.5 second quick closing, automatic activity test and the like.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the utility model, and that, although the utility model has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the utility model as defined by the appended claims.
Claims (2)
1. A main steam valve of a low-parameter saturated steam turbine and an actuating mechanism thereof are characterized in that: the main steam valve of the low-parameter saturated steam turbine and the actuating mechanism thereof comprise a main steam valve (8), a high-pressure oil cylinder (9), a limit switch (10), a spring cylinder (11) and a hand wheel (12); the high-pressure oil cylinder (9) and the spring cylinder (11) are arranged at two ends of the limit switch (10), a hand wheel (12) is arranged at the other end of the spring cylinder (11), and the main steam valve (8) is of a butterfly valve structure and is arranged at the bottom of the limit switch (10); main steam valve (8) include sealing washer (2), clamp plate (3), butterfly plate (4), valve rod (5), clamp bolt (6), valve body (7) center department install valve rod (5), the valve rod (5) outside sets up butterfly plate (4), clamp plate (3) are installed in butterfly plate (4) outside, clamp plate (3) are fixed through clamp bolt (6), be provided with between clamp plate (3) and the sealed face of valve body (1) sealing washer (2), clamp plate (3) and butterfly plate (4) are in between valve rod (5) and valve body (7).
2. The main steam valve and the actuator thereof of the low parameter saturated steam turbine according to claim 1, characterized in that: the main steam valve (8) adopts a three-eccentric metal hard sealing butterfly valve structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122474810.9U CN216043913U (en) | 2021-10-14 | 2021-10-14 | Main steam valve of low-parameter saturated steam turbine and actuating mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122474810.9U CN216043913U (en) | 2021-10-14 | 2021-10-14 | Main steam valve of low-parameter saturated steam turbine and actuating mechanism thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216043913U true CN216043913U (en) | 2022-03-15 |
Family
ID=80609133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122474810.9U Active CN216043913U (en) | 2021-10-14 | 2021-10-14 | Main steam valve of low-parameter saturated steam turbine and actuating mechanism thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216043913U (en) |
-
2021
- 2021-10-14 CN CN202122474810.9U patent/CN216043913U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216043913U (en) | Main steam valve of low-parameter saturated steam turbine and actuating mechanism thereof | |
| CN110030412A (en) | A kind of heavy caliber multistage pilot operated safety valve | |
| CN111810664B (en) | Vacuum die-casting stop valve of hydraulic pump | |
| CN211039815U (en) | Check valve with drainage device | |
| CN210484631U (en) | Angle type lifting check valve | |
| CN209444839U (en) | A kind of wear-resisting accurate adjustment ball valve of square hole runner | |
| CN2309470Y (en) | Leading gas safety relief valve | |
| CN110848429A (en) | Cut-off double-purpose valve | |
| CN204828735U (en) | Promotion formula floodgate plug valve sealed firmly | |
| CN210949952U (en) | Ultra-high pressure guide plate flat gate valve | |
| CN210531618U (en) | Pneumatic stop valve for high-pressure oxygen | |
| CN209294512U (en) | A kind of micro- pendulum-type sphere-contact shut-off valve | |
| CN111677895A (en) | Multi-bypass pressure relief type gate valve of high-pressure forge welding structure for nuclear power | |
| CN114607779A (en) | Cut jar and reform transform project heat supply governing valve and cut jar system of reforming transform | |
| CN208859024U (en) | A kind of safety-type angle valve | |
| CN206409655U (en) | A kind of buried gate valve of cast steel | |
| CN212004436U (en) | Rotary valve with guide pressure release valve structure | |
| CN215720938U (en) | Improved double-acting stop valve | |
| CN114198347B (en) | Safety cut-off valve hydraulic control system | |
| CN220102186U (en) | Separated electric stop check valve | |
| CN210600226U (en) | Double-cutoff bottom valve | |
| CN217951329U (en) | Cold air blow-off valve with anti-blocking function | |
| CN218718948U (en) | Ball valve with anti-blocking function | |
| CN219327817U (en) | Main valve of pressure relief valve | |
| CN210318548U (en) | Double-seal water inlet butterfly valve with maintenance seal locking device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |