CN219197415U - Steam turbine leakage collecting device and steam turbine - Google Patents
Steam turbine leakage collecting device and steam turbine Download PDFInfo
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- CN219197415U CN219197415U CN202320151923.1U CN202320151923U CN219197415U CN 219197415 U CN219197415 U CN 219197415U CN 202320151923 U CN202320151923 U CN 202320151923U CN 219197415 U CN219197415 U CN 219197415U
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Abstract
The utility model relates to the technical field of turbine equipment and discloses a steam turbine leakage collecting device and a steam turbine, wherein the steam turbine leakage collecting device comprises a steam inlet regulating valve, a steam collecting pipeline and a steam collecting cylinder, the steam inlet regulating valve comprises a valve rod and a valve body with a cavity for accommodating the valve rod, a leakage extraction channel extending from the cavity to the outside of the valve body is arranged on the valve body, and the steam inlet end of the steam collecting pipeline is communicated with the leakage extraction channel; the steam turbine comprises a body, a steam inlet regulating valve connected with a steam inlet chamber of the body and a steam turbine leakage collecting device. The utility model can collect the leakage steam of the valve rod of the steam inlet regulating valve, reduce heat energy loss and avoid equipment aging caused by the high-temperature and high-humidity environment formed by the leakage steam.
Description
Technical Field
The utility model relates to the technical field of turbine equipment, in particular to a steam turbine leakage collecting device and a steam turbine.
Background
Steam turbines are rotary machines that convert steam heat energy into mechanical energy. After entering a steam turbine system, steam from a boiler sequentially passes through a series of annular static blades and annular movable blades to convert steam heat energy into mechanical energy for rotating a rotor of the steam turbine, and the steam after acting enters a steam pipe network or a condensing system. In order to prevent high-temperature steam at the front steam seal position of the cylinder from leaking into the bearing box to cause the temperature of the bearing to rise and the lubricating oil to carry water, the steam turbine adopts a closed steam seal system, and the joint of the rotor main shaft and the cylinder is sealed in a steam seal mode.
The existing steam seal system has the condition that the valve rod of the steam inlet regulating valve seriously leaks steam, the leaked steam has a larger enthalpy value, so that huge heat energy loss is caused, and the steam turbine is in a high-temperature and high-humidity environment for a long time due to the fact that the valve rod of the steam inlet regulating valve is positioned at the top of the steam turbine and the leaked steam is used for accelerating the ageing of equipment.
Disclosure of Invention
The utility model aims to solve the problem of steam leakage of a valve rod of a steam turbine steam inlet regulating valve in the prior art.
In order to achieve the above object, according to one aspect of the present utility model, there is provided a steam turbine leakage collecting device, including a steam inlet adjusting valve, a steam collecting pipe and a steam collecting drum, wherein the steam inlet adjusting valve includes a valve rod and a valve body having a cavity for accommodating the valve rod, a leakage extraction passage extending from the cavity to the outside of the valve body is provided on the valve body, and two ends of the steam collecting pipe are respectively connected to the leakage extraction passage and the steam collecting drum.
Optionally, a bushing and a sealing ring are sequentially sleeved on the valve rod from inside to outside, and the communication position of the steam leakage leading-out channel and the cavity is located at the inner side of the sealing ring.
Optionally, a first stop valve is arranged on the steam collecting pipeline.
Optionally, the steam leakage collecting device of the steam turbine further comprises a steam exhaust pipeline connected with the steam collecting pipeline in a bypass mode and a second stop valve arranged on the steam exhaust pipeline, and the steam exhaust pipeline is communicated with the steam collecting pipeline.
Optionally, the steam outlet end of the steam exhaust pipeline is connected to a trench.
Optionally, the steam inlet end of the steam exhaust pipeline is located upstream of the first stop valve.
Optionally, the steam inlet end of the steam exhaust pipeline is located upstream of the second stop valve.
Optionally, the system comprises two steam inlet regulating valves and two steam collecting pipelines, wherein the two steam collecting pipelines are respectively communicated with the steam leakage leading-out channels of the two steam inlet regulating valves.
Optionally, the two steam collecting pipelines are communicated with the steam collecting cylinder through a tee joint pipe.
The steam turbine comprises a main body and the steam turbine leakage collecting device according to the scheme, and the steam inlet regulating valve is arranged in a steam inlet chamber of the main body.
Through above-mentioned technical scheme, this steam turbine leakage collecting device can draw forth steam turbine admission control valve rod leakage and collect to through setting up the leakage separation when the steam exhaust pipe will start and normal operation, the steam that makes the collection steam drum collect can recycle, thereby has reduced heat energy loss, has avoided the ageing of high temperature high humidity environment acceleration equipment because of leaking the steam formation simultaneously.
Drawings
FIG. 1 is a schematic structural view of an admission control valve in an embodiment;
FIG. 2 is a schematic structural view of a steam leakage collecting device of a steam turbine in an embodiment.
Description of the reference numerals
1. First stop valve of steam collecting pipeline 2
3. Steam collecting cylinder 4 steam exhaust pipeline
5. Second stop valve 6 three-way pipe
7. Valve rod of admission regulating valve 71
72. Valve body 73 bushing
74. The sealing ring 8 is led out of the channel
Detailed Description
In the present utility model, unless otherwise indicated, directional terms such as "upper, lower, left, right, inner, outer" and the like are used to indicate an azimuth or a positional relationship based on that shown in the drawings, only for convenience of description of the present design and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present design.
In the description of the present design, it should be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and the like are to be construed broadly, and for example, "connected," may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this design will be understood by those of ordinary skill in the art in a specific context.
The steam turbine leakage collecting device comprises a steam inlet regulating valve 7, a steam collecting pipeline 1 and a steam collecting cylinder 3, wherein the steam inlet regulating valve comprises a valve rod 71 and a valve body 72 with a cavity for accommodating the valve rod 71, a leakage steam leading-out channel 8 extending from the cavity to the outside of the valve body 72 is arranged on the valve body 72, and two ends of the steam collecting pipeline 1 are respectively communicated with the leakage steam leading-out channel 8 and the steam collecting cylinder 3.
As shown in fig. 1, the steam inlet regulating valve 7 comprises a valve body 72, a cavity is formed in the valve body 72 and can accommodate a valve rod 71, a small amount of steam leakage inevitably exists between the valve rod 71 and the valve body 72 under the pressure of steam, and an extraction channel 8 is arranged on the valve body 72, and the extraction channel 8 is communicated with the cavity in the valve body and the outside of the valve body, so that the steam leakage is extracted. The steam outlet of the extraction channel 8 is connected with a steam collecting pipeline 1, the tail end of the steam collecting pipeline 1 is communicated with the steam collecting cylinder 3, and steam leakage extracted from a cavity inside the valve body 72 enters the steam inlet end of the steam collecting pipeline 1 through the extraction channel 8 and is conveyed to the steam collecting cylinder 3 through the steam collecting pipeline 1.
Optionally, the valve rod 71 is sequentially sleeved with a bushing 73 and a sealing ring 74 from inside to outside, and the communication position of the leakage steam outlet channel 8 and the cavity is located at the inner side of the sealing ring 74. A bushing 73 and a sealing ring 74 are sequentially arranged between the valve rod 71 and the valve body from inside to outside, the bushing 73 is used for supporting the valve rod 71 in a cavity of the valve body 72, and the sealing ring 74 is used for sealing a space between the valve body 72 and the valve rod 71 so as to reduce steam leakage. The leakage steam leading-out channel 8 is communicated with the cavity, and the joint of the leakage steam leading-out channel 8 and the cavity is positioned at the inner side of the sealing ring 74, so that a small amount of leaked steam is discharged, the pressure action of the steam on the sealing ring 74 is reduced, and leakage steam from the outer side of the sealing ring 74 is avoided or reduced. A further sealing ring 74 may be provided on the inside of the bushing 73 to enhance the sealing effect.
Optionally, the steam collecting pipe 1 is provided with a first shut-off valve 2. The first shut-off valve 2 is capable of blocking steam delivered from the steam inlet of the steam collecting duct 1 to the steam collecting cylinder 3. When the steam turbine is operating normally, the regulating valve rod 71 has a high enthalpy value, and is suitable for recycling. The leaked steam is led out from the leading-out channel 8 and conveyed through the steam collecting pipeline 1, at the moment, the first stop valve 2 is in an open state, the steam is conveyed to the steam collecting cylinder 3 through the steam collecting pipeline 1, and the steam collecting cylinder 3 collects the leaked steam so as to be reused. When the steam turbine is started, the valve rod 71 of the regulating valve leaks steam which contains part of impurities, and is not suitable for recycling, and at the moment, the first stop valve 2 is closed, so that the leaked steam is ensured not to enter the steam collecting cylinder 3 through the steam collecting pipeline 1.
Optionally, the steam leakage collecting device of the steam turbine further comprises a steam exhaust pipeline 4 connected to the steam collecting pipeline 1 and a second stop valve 5 arranged on the steam exhaust pipeline 4, and the steam exhaust pipeline 4 is communicated with the steam collecting pipeline 1.
Because the steam leakage generated by the steam turbine during starting and under specific working conditions contains partial impurities, the steam leakage is not suitable for recycling, in order to prevent the steam leakage which is not suitable for recycling from entering the steam collecting cylinder 3, the steam collecting pipeline 1 is connected with the steam exhaust pipeline 4, so that the steam leakage which is not suitable for recycling is led out and is separated from the recyclable steam leakage. A second stop valve 5 is arranged on the steam exhaust pipeline 4, and the second stop valve 5 can control the on-off of the steam exhaust pipeline 4. When the steam leakage generated by the valve rod 71 of the steam turbine regulating valve is suitable for recycling, the second stop valve 5 on the steam exhaust pipeline 4 is closed, and the first stop valve 2 on the steam collecting pipeline 1 is opened at the same time, so that the steam leakage enters the steam collecting cylinder 3 through the steam collecting pipeline 1 and cannot enter the steam exhaust pipeline 4; when the steam leakage generated by the valve rod 71 of the steam turbine regulating valve is not suitable for use, the second stop valve 5 is opened, and the first stop valve 2 on the steam collecting pipeline 1 is closed at the same time, so that the steam leakage does not enter the steam collecting cylinder 3, but can enter the steam exhaust pipeline 4 from the steam collecting pipeline 1, and the steam leakage is discharged or recovered through the steam exhaust pipeline 4, so that the differential treatment of the steam leakage generated under the normal working condition is realized.
Optionally, the steam outlet end of the steam exhaust pipeline 4 is connected to a trench. The steam exhaust pipeline 4 is communicated with the steam collecting pipeline 1, the steam outlet end is connected to the trench, and when the steam turbine is started or under a specific working condition, steam leakage which is not suitable for utilization is generated, the steam can enter the steam exhaust pipeline 4 through the steam collecting pipeline 1 and is discharged to the trench through the steam exhaust pipeline 4.
Optionally, the steam inlet end of the steam exhaust pipe 4 is located upstream of the first stop valve 2.
The exhaust pipeline 4 is connected to the side of the steam collecting pipeline 1, and meanwhile, the first stop valve 2 for controlling the on-off of the inside of the steam collecting pipeline 1 is arranged on the steam collecting pipeline 1, and the first stop valve 2 is arranged at the downstream of the communication position of the exhaust pipeline 4 and the steam collecting pipeline 1, so that the steam leakage generated when the first stop valve 2 is closed is difficult to enter the exhaust pipeline 4 from the steam collecting pipeline 1.
Optionally, the steam inlet end of the steam exhaust pipe 4 is located upstream of the second stop valve 5. The exhaust pipeline 4 is communicated with the steam collecting pipeline 1, steam leakage enters the steam inlet end of the exhaust pipeline 4 from the steam collecting pipeline 1, and the second stop valve 5 is arranged between the steam inlet end and the steam outlet end of the exhaust pipeline 4 and is used for controlling the on-off of the inside of the exhaust pipeline 4.
Optionally, the system comprises two steam inlet regulating valves 7 and two steam collecting pipelines 1, wherein the two steam collecting pipelines 1 are respectively communicated with the steam leakage leading-out channels 8 of the two steam inlet regulating valves 7. In a specific embodiment, the steam turbine is provided with two steam inlet regulating valves 7, so that two steam collecting pipelines 1 are arranged, the steam inlet ends of the steam collecting pipelines are respectively communicated with the extraction channels 8 arranged at the two steam inlet regulating valves 7, and the steam leaked by the two steam inlet regulating valves 7 is conveyed through the steam collecting channels 1.
Optionally, the two steam collecting pipes 1 are communicated with the steam collecting cylinder 3 through a tee pipe 6. The steam inlet ends of the two steam collecting channels 1 are respectively communicated with the steam leakage leading-out channels 8 of the two steam inlet regulating valves 7, the steam outlet ends of the two steam collecting channels 1 are communicated with each other through a three-way pipe 6 and are communicated with the steam collecting cylinder 3, and the steam collecting cylinder 3 is connected to the joint of the two steam collecting pipelines 1 through the three-way pipe 6, so that recovery of steam leakage generated by the two steam inlet regulating valves 7 is realized.
Another aspect of the present utility model provides a steam turbine, including a main body and the steam leakage collecting device of the steam turbine according to the above aspect, where the steam inlet adjusting valve 7 is disposed in a steam inlet chamber of the main body. The steam turbine includes the body with the steam leakage recovery unit, steam admission control valve 7 set up in the steam admission chamber of body to control the intercommunication and the disconnection and the flow of steam admission chamber, the steam leakage draw-out passageway 8 set up in on the valve body 72 of steam admission control valve 7, will the steam leakage that steam admission control valve rod 71 produced is carried to vapor collecting pipeline 1, and then is retrieved through setting up in the terminal vapor collecting cylinder 3 of vapor collecting pipeline 1.
The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a plurality of simple variants of the technical proposal of the utility model can be carried out, comprising that each specific technical feature is combined in any suitable way, and in order to avoid unnecessary repetition, the utility model does not need to be additionally described for various possible combinations. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.
Claims (10)
1. The utility model provides a steam turbine steam leakage collection device, its characterized in that, includes admission control valve (7), vapor collecting pipeline (1) and vapor collecting cylinder (3), admission control valve includes valve rod (71), has valve body (72) of holding the cavity of valve rod (71), be provided with on valve body (72) follow the cavity extends to outside vapor leakage of valve body (72) draws forth passageway (8), the both ends of vapor collecting pipeline (1) communicate respectively in vapor leakage draws forth passageway (8) with vapor collecting cylinder (3).
2. The steam turbine leakage collecting device according to claim 1, wherein a bushing (73) and a sealing ring (74) are sequentially sleeved on the valve rod (71) from inside to outside, and the communication position of the leakage leading-out channel (8) and the cavity is located at the inner side of the sealing ring (74).
3. The steam turbine leakage collecting device according to claim 1, wherein a first stop valve (2) is arranged on the steam collecting pipeline (1).
4. A steam turbine leakage collecting device according to claim 3, further comprising a steam exhaust pipe (4) connected by-to the steam collecting pipe (1) and a second stop valve (5) provided in the steam exhaust pipe (4), wherein the steam exhaust pipe (4) is communicated with the steam collecting pipe (1).
5. The steam turbine leakage collecting device according to claim 4, wherein the steam outlet end of the steam exhaust pipe (4) is connected to a trench.
6. The steam turbine leakage collecting device according to claim 4, characterized in that the steam inlet end of the steam exhaust pipe (4) is located upstream of the first shut-off valve (2).
7. The steam turbine leakage collecting device according to claim 4, characterized in that the steam inlet end of the steam exhaust pipe (4) is located upstream of the second shut-off valve (5).
8. The steam turbine leakage collecting device according to claim 1, comprising two steam inlet regulating valves (7) and two steam collecting pipelines (1), wherein the two steam collecting pipelines (1) are respectively communicated with the leakage leading-out channels (8) of the two steam inlet regulating valves (7).
9. The steam turbine leakage collecting device according to claim 1, wherein two steam collecting pipelines (1) are communicated with the steam collecting cylinder (3) through a tee pipe (6).
10. A steam turbine comprising a body and a steam turbine leakage collecting device according to any one of claims 1-9, said inlet regulating valve (7) being arranged in the inlet chamber of said body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320151923.1U CN219197415U (en) | 2023-01-18 | 2023-01-18 | Steam turbine leakage collecting device and steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320151923.1U CN219197415U (en) | 2023-01-18 | 2023-01-18 | Steam turbine leakage collecting device and steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219197415U true CN219197415U (en) | 2023-06-16 |
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ID=86706646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320151923.1U Active CN219197415U (en) | 2023-01-18 | 2023-01-18 | Steam turbine leakage collecting device and steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219197415U (en) |
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2023
- 2023-01-18 CN CN202320151923.1U patent/CN219197415U/en active Active
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