CN111425622A - Shuttle valve for gas turbine - Google Patents
Shuttle valve for gas turbine Download PDFInfo
- Publication number
- CN111425622A CN111425622A CN202010280867.2A CN202010280867A CN111425622A CN 111425622 A CN111425622 A CN 111425622A CN 202010280867 A CN202010280867 A CN 202010280867A CN 111425622 A CN111425622 A CN 111425622A
- Authority
- CN
- China
- Prior art keywords
- pipe joint
- valve seat
- inlet pipe
- air
- shuttle
- 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.)
- Pending
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Classifications
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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
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/057—Control or regulation
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
- F16K1/443—Details of seats or valve members of double-seat valves the seats being in series
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
Abstract
A shuttle valve for a gas turbine relates to the technical field of gas turbines. The invention aims to solve the problem that the conventional valve cannot simultaneously play roles in preventing surge during starting of the gas turbine and overspeed protection of the power turbine in working condition operation. A shell (6) is a hollow cylindrical shell, a first valve seat (2) and a second valve seat (4) are embedded into the shell (6), a first inlet pipe joint (1) and a second inlet pipe joint (5) are respectively installed at the left end and the right end of the shell (6) and extend into the shell (6) to abut against the first valve seat (2) and the second valve seat (4), an outlet pipe joint (7) is installed in the middle of the shell (6), and introduced air sequentially penetrates through the first inlet pipe joint (1) or the second inlet pipe joint (5), the first valve seat (2) or the second valve seat (4) and the shell (6) and then is led out through the outlet pipe joint (7).
Description
Technical Field
The present invention relates to a shuttle valve. The valve can supply compressed air to an air bypass valve control cavity in a reversing way from an air bypass valve control system or an air bypass valve emergency opening system, is a pneumatic control system accessory used in the ship industry, and belongs to the energy power industry.
Background
The pneumatic control system of the gas turbine is used for obtaining compressed air, controlling the air compressor to supply air to the oil way 1 and the oil way 2 of the nozzle by 1 air bypass valve for atomization and blowing and opening the air bypass valve in emergency. To prevent gas turbine surge, an air bypass valve control system opens and maintains an open state of an air bypass valve at the start of the gas turbine, and the air bypass valve is closed when a certain rotational speed of a high pressure compressor is reached. When the power turbine of the gas turbine is overspeed, the air bypass valve emergency opening system enables 4 air bypass valves behind the air compressor to be opened simultaneously, the working condition is quickly reduced, and the gas turbine is prevented from generating great danger. However, the existing valve can only realize the opening of an air bypass valve control system or an air bypass valve emergency opening system, and cannot realize the functions of preventing surge during the starting of the gas turbine and protecting the overspeed during the working condition operation of the gas turbine at the same time.
Disclosure of Invention
The invention aims to solve the problems that the conventional valve cannot simultaneously complete surge prevention during the starting of a gas turbine and overspeed protection during the working condition operation of the gas turbine. Further provided is a shuttle valve for a gas turbine.
The technical scheme of the invention is as follows: the utility model provides a gas turbine uses shuttle valve includes the casing, it still includes first inlet coupling, the second inlet coupling, first disk seat, the shuttle, second disk seat and outlet pipe joint, the casing is hollow tube-shape casing, first disk seat and second valve seat are embedded in the casing, first inlet coupling and second inlet coupling are installed respectively at the left and right sides both ends of casing, and stretch into and support on first disk seat and second disk seat in the casing, the outlet pipe joint is installed at the middle part of casing, the air of introducing passes first inlet coupling or second inlet coupling in proper order, draw forth through the outlet pipe joint behind first disk seat or second disk seat and the casing.
Furthermore, first inlet coupling is the same with second inlet coupling structure, and first inlet coupling is the axle type part, and the excircle surface of first inlet coupling is equipped with spacing boss, and first inlet coupling sets up along its axis direction and introduces the air through hole.
Further, the air introducing passage holes are circular passage holes including air introducing passage holes and air flow passing holes, the air introducing passage holes are close to the air introducing end, opened in sequence with the air flow passing holes, and the aperture of the air introducing passage holes is larger than that of the air flow passing holes.
Furthermore, the first valve seat and the second valve seat have the same structure, the first valve seat is a circular valve seat, an inner cavity matched with the shuttle-shaped part in shape is formed in the circular valve seat, and a plurality of vent holes are formed in the first valve seat of the contact part of the first valve seat and the second valve seat along the circumferential direction in an annular array mode.
Furthermore, the middle part of the hollow inner cavity of the shell is provided with an air containing cavity along the circumferential direction of the hollow inner cavity, and the air containing cavity is provided with a leading-out port.
Further, the outer side walls of the first inlet pipe joint, the second inlet pipe joint and the outlet pipe joint are provided with external threads.
Furthermore, the device also comprises a plurality of annular sealing rings, and the annular sealing rings are arranged at the joints of the first inlet pipe joint and the second inlet pipe joint and the inner side wall of the end part of the shell; at least one annular sealing ring is arranged between the outer side walls of the first valve seat and the second valve seat and the inner side wall of the shell; and the shuttle heads at the two ends of the shuttle-shaped part are respectively provided with an annular sealing ring.
Compared with the prior art, the invention has the following effects:
The invention has a reversing function, when the gas turbine is started, the air bypass valve control system supplies air to the first inlet pipe joint, the shuttle moves rightwards under the action of air pressure, the air is shielded from passing to the inlet pipe joint, and the air is led out through the outlet pipe joint. When the gas turbine power turbine is over-speeding, the air bypass valve emergency opening system supplies air to the second inlet connection, the shuttle moves to the left under air pressure, masking the passage of air to the inlet connection and directing the air out through the outlet connection. Therefore, 1 air bypass can be opened by the air bypass valve control system, 4 air bypass valves can be opened by the air bypass valve emergency opening system, the anti-surge and overspeed protection effects of starting of the gas turbine are achieved, and the operation safety of the gas turbine is improved. The gas turbine shuttle valve has compact structure and high reliability.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1, and a gas turbine shuttle valve of the present embodiment includes a housing 6, and further includes a first inlet pipe joint 1, a second inlet pipe joint 5, a first valve seat 2, a shuttle 3, a second valve seat 4, and an outlet pipe joint 7, where the housing 6 is a hollow cylindrical housing, the first valve seat 2 and the second valve seat 4 are embedded in the housing 6, the first inlet pipe joint 1 and the second inlet pipe joint 5 are respectively installed at left and right ends of the housing 6 and extend into the housing 6 to abut against the first valve seat 2 and the second valve seat 4, the outlet pipe joint 7 is installed at a middle portion of the housing 6, and introduced air sequentially passes through the first inlet pipe joint 1 or the second inlet pipe joint 5, the first valve seat 2 or the second valve seat 4, and the housing 6 and then is led out through the outlet pipe joint 7.
The structure of the embodiment is simple, the structure is symmetrical except the outlet pipe joint 7, and particularly, the structures of the first valve seat 2 and the second valve seat 4 and the structures of the first inlet pipe joint 1 and the second inlet pipe joint 5 are the same, so that the production and the manufacture are convenient, and the installation process is convenient to guarantee.
The second embodiment is as follows: referring to fig. 1, the first inlet pipe joint 1 and the second inlet pipe joint 5 of the present embodiment have the same structure, the first inlet pipe joint 1 is a shaft-like component, the outer circumferential surface of the first inlet pipe joint 1 is provided with a limiting boss 1-2, and the first inlet pipe joint 1 is provided with an air inlet through hole 1-1 along the axial direction thereof. Due to the arrangement, the shaft parts are convenient to process, produce and manufacture, and the limiting bosses 1-2 not only can seal the shell, but also can play a role in mounting and positioning. Other components and connections are the same as in the first embodiment.
The third concrete implementation mode: the present embodiment is described with reference to fig. 1, and the introduction air passing holes 1-1 of the present embodiment are circular passing holes including air introduction passing holes and air flow passing holes, the air introduction passing holes being close to the air introduction end, being opened in sequence with the air flow passing holes, and the aperture of the air introduction passing holes being larger than the aperture of the air flow passing holes. So set up, the big ability of the aperture of air introduction through hole is convenient for the air to be introduced smoothly. Other compositions and connections are the same as in the first or second embodiments.
The fourth concrete implementation mode: referring to fig. 1, the first valve seat 2 and the second valve seat 4 of the present embodiment have the same structure, the first valve seat 2 is a circular valve seat, an inner cavity 2-1 matching with the shape of the shuttle 3 is opened in the circular valve seat, and a plurality of vent holes 2-2 are opened in the first valve seat 2 at the contact part of the first valve seat 2 and the second valve seat 4 in an annular array along the circumferential direction. So set up, not only can carry out spacingly to the motion of shuttle, can also draw forth the gas of introducing. Other compositions and connection relationships are the same as in the first, second or third embodiment.
The cooperation between the first valve seat 2 and the second valve seat 4 of this embodiment and the shuttle 3 is transition fit, if adopt clearance fit, the other side of shuttle is sealed not well, can lead to the air to have slight leakage, if adopt interference fit, the shuttle has the degree of difficulty in the removal process, and frictional force is big moreover, easily hinders first valve seat 2, second valve seat 4 and shuttle 3, increases cost of maintenance.
The fifth concrete implementation mode: referring to fig. 1 to explain the present embodiment, the middle of the hollow inner cavity of the housing 6 of the present embodiment is provided with an air cavity 6-1 along the circumferential direction thereof, and the air cavity 6-1 is provided with a leading-out port 6-2. So set up, be convenient for draw the air of introducing smoothly through the conversion. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.
The sixth specific implementation mode: referring to fig. 1, the first inlet coupling 1, the second inlet coupling 5, and the outlet coupling 7 of the present embodiment are provided with external threads on their outer side walls. So set up, be convenient for with external other system and component connection, guarantee the smooth introduction of air. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.
The seventh embodiment: referring to fig. 1, the present embodiment further includes a plurality of annular sealing rings 8, and one annular sealing ring 8 is installed at the connection position of the first inlet pipe joint 1 and the second inlet pipe joint 5 and the inner side wall of the end portion of the housing 6; at least one annular sealing ring 8 is arranged between the outer side walls of the first valve seat 2 and the second valve seat 4 and the inner side wall of the shell 6; and two annular sealing rings 8 are respectively arranged on the shuttle heads at the two ends of the shuttle-shaped part 3. So set up, sealed effectual. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.
The working principle of the invention is explained in connection with fig. 1:
When the gas turbine is started, the air bypass valve control system supplies air into the first inlet coupling 1, the shuttle 3 moves to the right under the air pressure, covering the passage of air to the second inlet coupling 5, and drawing it out through the outlet pipe coupling 7. When the gas turbine power turbine is over-speeding, the air bypass valve emergency opening system supplies air to the second inlet coupling 5 and the shuttle 3 moves to the left under air pressure, masking the passage of air to the first inlet coupling 1 and directing the air out through the outlet coupling 7.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A shuttle valve for a gas turbine, characterized by: it comprises a shell (6), a first inlet pipe joint (1), a second inlet pipe joint (5), a first valve seat (2), a shuttle-shaped piece (3), a second valve seat (4) and an outlet pipe joint (7),
Casing (6) are hollow tube-shape casing, first disk seat (2) and second disk seat (4) are embedded in casing (6), both ends about casing (6) are installed respectively in first inlet coupling (1) and second inlet coupling (5), and stretch into casing (6) and support on first disk seat (2) and second disk seat (4), the middle part at casing (6) is installed in outlet coupling (7), the air of introducing passes first inlet coupling (1) or second inlet coupling (5) in proper order, draw forth through outlet coupling (7) behind first disk seat (2) or second disk seat (4) and casing (6).
2. The shuttle valve for a gas turbine according to claim 1, wherein: the structure of the first inlet pipe joint (1) is the same as that of the second inlet pipe joint (5), the first inlet pipe joint (1) is an axial part, the outer circle surface of the first inlet pipe joint (1) is provided with a limiting boss (1-2), and the first inlet pipe joint (1) is provided with an introduced air through hole (1-1) along the axis direction thereof.
3. A gas turbine shuttle valve as claimed in claim 2 wherein: the air introducing passage holes (1-1) are circular passage holes including air introducing passage holes and air flow passage holes, the air introducing passage holes are adjacent to the air introducing end and are opened in sequence with the air flow passage holes, and the hole diameters of the air introducing passage holes are larger than those of the air flow passage holes.
4. The shuttle valve for a gas turbine according to claim 1, wherein: the structure of the first valve seat (2) is the same as that of the second valve seat (4), the first valve seat (2) is a circular valve seat, an inner cavity (2-1) matched with the shape of the shuttle-shaped piece (3) is formed in the circular valve seat, and a plurality of vent holes (2-2) are formed in the first valve seat (2) at the contact part of the first valve seat (2) and the second valve seat (4) in an annular array mode along the circumferential direction of the first valve seat (2).
5. The shuttle valve for a gas turbine according to claim 1, wherein: the middle part of the hollow inner cavity of the shell (6) is provided with an air containing cavity (6-1) along the circumferential direction, and the air containing cavity (6-1) is provided with a leading-out port (6-2).
6. The shuttle valve for a gas turbine according to claim 1, wherein: the external side walls of the first inlet pipe joint (1), the second inlet pipe joint (5) and the outlet pipe joint (7) are all provided with external threads.
7. The shuttle valve for a gas turbine according to claim 1, wherein: the novel gas-liquid separator also comprises a plurality of annular sealing rings (8), wherein the annular sealing rings (8) are arranged at the joints of the first inlet pipe joint (1) and the second inlet pipe joint (5) and the inner side wall of the end part of the shell (6); at least one annular sealing ring (8) is arranged between the outer side walls of the first valve seat (2) and the second valve seat (4) and the inner side wall of the shell (6); and the shuttle heads at the two ends of the shuttle-shaped part (3) are respectively provided with an annular sealing ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010280867.2A CN111425622A (en) | 2020-04-10 | 2020-04-10 | Shuttle valve for gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010280867.2A CN111425622A (en) | 2020-04-10 | 2020-04-10 | Shuttle valve for gas turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111425622A true CN111425622A (en) | 2020-07-17 |
Family
ID=71556133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010280867.2A Pending CN111425622A (en) | 2020-04-10 | 2020-04-10 | Shuttle valve for gas turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111425622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116989150A (en) * | 2023-09-26 | 2023-11-03 | 常州耐普德新能源科技有限公司 | Valve for cabin rainwater exhaust and transportation and operation method thereof |
-
2020
- 2020-04-10 CN CN202010280867.2A patent/CN111425622A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116989150A (en) * | 2023-09-26 | 2023-11-03 | 常州耐普德新能源科技有限公司 | Valve for cabin rainwater exhaust and transportation and operation method thereof |
| CN116989150B (en) * | 2023-09-26 | 2023-12-05 | 常州耐普德新能源科技有限公司 | Valve for cabin rainwater exhaust and transportation and operation method thereof |
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