CN215256352U - Steam turbine low pressure cylinder shaft seal drainage device - Google Patents
Steam turbine low pressure cylinder shaft seal drainage device Download PDFInfo
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- CN215256352U CN215256352U CN202121613245.3U CN202121613245U CN215256352U CN 215256352 U CN215256352 U CN 215256352U CN 202121613245 U CN202121613245 U CN 202121613245U CN 215256352 U CN215256352 U CN 215256352U
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- automatic
- drain
- drain pipe
- shaft seal
- low pressure
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Abstract
The utility model discloses a steam turbine low pressure cylinder shaft seal drainage device, which comprises a shaft seal heater provided with a drainage port; the U-shaped drain pipeline comprises a U-shaped drain pipe, the highest point of the U-shaped drain pipe is higher than the drain port and lower than the top of the shaft seal heater, and the U-shaped drain pipeline is communicated with the drain port; the automatic drainage pipeline comprises an automatic drainage device, and the automatic drainage pipeline is communicated with the shaft seal heater and the condenser. The utility model discloses a parallelly connected U type drain pipe and automatic drain pipe carry out the drainage, have increased the hydrophobic volume, the automatic steam trap that sets up on the automatic drain pipe can hinder vapour drainage, prevent that steam from getting into the vacuum environment in the condenser destruction condenser, has ensured the normal operating of bearing seal heater and condenser equipment and system, and U type drain pipe is as reserve drain pipe, is not enough to satisfy the hydrophobic demand when automatic drain pipe, just can carry out the drainage when more ponding in the bearing seal heater.
Description
Technical Field
The utility model relates to a hydrophobic technical field of steam turbine, especially a steam turbine low pressure jar shaft seal hydrophobic means.
Background
The shaft seal heater is an important heat exchange device in a shaft seal system of a steam turbine, and has the functions of collecting steam seal leakage at the shaft end of each cylinder of the steam turbine and valve rod leakage of the steam turbine and heating main condensation water by using the heat energy of the steam. Because the steam also contains air, when the steam releases heat in the shaft seal heater, the steam is condensed into water, and the air needs to be discharged, thereby utilizing the energy of the leaked steam, recovering the working medium and improving the economical efficiency of the thermodynamic system of the steam turbine.
The hydrophobic system of traditional bearing seal heater considers condenser vacuum environment and extremely low operating pressure, often uses multistage water seal U-shaped pipe to carry out soda isolation, sees from the behavior, and it is great to control the water seal water level degree of difficulty through U type water seal pipe, owing to in the unit operation, actual operating parameter is not accorded with design parameter, still receives the unit load, the unit vacuum difference is great in different seasons, the influence of dynamic factors such as hydrophobic gasification, often leads to the fact two kinds of results: 1. the water level of the water seal rises, and if the water level is not adjusted in time, once the water level rises to the height of the shaft blower, the load of the shaft blower is overloaded and the motor is burnt; 2. the water level of the water seal is reduced, if the water level is not adjusted timely, the water seal is continuously reduced to cause water shortage and destroy vacuum, the normal operation of the steam turbine is influenced, and once the water seal is found or adjusted timely, a shutdown accident caused by the vacuum destruction of the steam turbine is caused.
SUMMERY OF THE UTILITY MODEL
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.
In order to solve the technical problem, the utility model provides a following technical scheme: a shaft seal drainage device of a low-pressure cylinder of a steam turbine comprises a shaft seal heater, a drainage pipe and a drainage pipe, wherein the shaft seal heater is provided with a drainage port; the U-shaped drain pipeline comprises a U-shaped drain pipe, the highest point of the U-shaped drain pipe is higher than the drain port and lower than the top of the shaft seal heater, and the U-shaped drain pipeline is communicated with the drain port; the automatic drainage pipeline comprises an automatic drainage device, and the automatic drainage pipeline is communicated with the shaft seal heater and the condenser.
As a preferred scheme of steam turbine low pressure jar bearing seal hydrophobic means, wherein: the U-shaped drain pipeline is provided with a first communicating valve, and the tail end of the first communicating valve is communicated to the hot well.
As a preferred scheme of steam turbine low pressure jar bearing seal hydrophobic means, wherein: and a second communicating valve is arranged on the automatic drainage pipeline.
As a preferred scheme of steam turbine low pressure jar bearing seal hydrophobic means, wherein: the automatic drain pipeline is also provided with a second bypass, and the second bypass is connected with the automatic steam trap in parallel.
As a preferred scheme of steam turbine low pressure jar bearing seal hydrophobic means, wherein: and a third communicating valve is arranged on the second bypass.
As a preferred scheme of steam turbine low pressure jar bearing seal hydrophobic means, wherein: stop valves are arranged on two sides of the automatic steam trap.
As a preferred scheme of steam turbine low pressure jar bearing seal hydrophobic means, wherein: the condenser is communicated to the hot well.
As a preferred scheme of steam turbine low pressure jar bearing seal hydrophobic means, wherein: the U-shaped drain pipe is provided with an exhaust pipe which is inclined upwards, and the exhaust pipe is provided with a one-way valve.
As a preferred scheme of steam turbine low pressure jar bearing seal hydrophobic means, wherein: the automatic steam trap adopts a free floating ball type steam trap.
The utility model discloses beneficial effect does: the utility model discloses a parallelly connected U type drain pipe and automatic drain pipe carry out the drainage, the hydrophobic volume has been increased, the automatic steam trap that sets up on the automatic drain pipe can hinder vapour drainage, prevent that steam from getting into the vacuum environment in the condenser destruction condenser, the normal operating of bearing seal heater and condenser equipment and system has been ensured, U type drain pipe is as reserve drain pipe, be not enough to satisfy hydrophobic demand when automatic drain pipe, just can carry out the drainage when more ponding in the bearing seal heater, thereby in time discharge the condensate water in the bearing seal heater when furthest's the efficiency of satisfying the thermal cycle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:
fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the automatic drain pipe structure in embodiment 2.
FIG. 3 is a schematic view of a U-shaped hydrophobic tube structure of example 3.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1, in order to provide a first embodiment of the present invention, the embodiment provides a steam turbine low pressure cylinder shaft seal drainage apparatus, which includes a shaft seal heater 100 provided with a drainage port 101, the drainage port 101 is disposed on a side wall of the shaft seal heater 100, and a certain distance is provided from the bottom of the shaft seal heater 100, so as to ensure a water level with a certain height in the shaft seal heater 100, and ensure safe operation of the shaft seal heater 100; the U-shaped drain pipeline 200 comprises a U-shaped drain pipe 201, the highest point of the U-shaped drain pipe 201 is higher than the drain port 101 and lower than the top of the shaft seal heater 100, the U-shaped drain pipeline 200 is communicated with the drain port 101, the U-shaped drain pipeline 200 works when the shaft seal heater 100 has a higher water level, and water in the shaft seal heater 100 is discharged through the U-shaped drain pipeline 200; automatic drain pipe 300, including automatic drain 301, automatic drain pipe 300 communicates gland seal heater 100 and condenser 400, and automatic drain 301 opens and to discharge the water in gland seal heater 100 to condenser 400 and prevent the passing through of steam through automatic drain pipe 300.
Under the normal condition, drainage in the shaft seal heater 100 is through automatic drain pipe 300 drainage to condenser 400, the automatic drain 301 that sets up on the automatic drain pipe 300 can hinder vapour drainage, prevent that steam from getting into condenser 400 and destroying the vacuum environment in condenser 400, the normal operating of shaft seal heater 100 and condenser 400 equipment and system has been ensured, make whole drainage system more reliable, it is more to amass water in the shaft seal heater 100, U type drain pipe 201 peak is higher than drain 101, be less than shaft seal heater 100 top, when ponding highly surpasss U type drain pipe 201 peak in it, U type drain pipe 200 begins the drainage of working, prevent that automatic drain pipe 300 is not enough to satisfy hydrophobic demand, in time with the condensate discharge in the shaft seal heater 100.
Carry out the drainage through parallelly connected U type drain pipe 200 and automatic drain pipe 300, the hydrophobic volume has been increased, automatic drain 301 that sets up on the automatic drain pipe 300 can hinder vapour drainage, prevent that steam from getting into the vacuum environment in condenser 400 destruction condenser 400, the normal operating of bearing seal heater 100 and condenser 400 equipment and system has been ensured, U type drain pipe 200 is as reserve drain pipe, be not enough to satisfy hydrophobic demand when automatic drain pipe 300, just can carry out the drainage when more ponding in bearing seal heater 100, thereby in time with the condensate discharge in the bearing seal heater 100 when furthest satisfies thermal cycle efficiency.
Example 2
Referring to fig. 1 to 2, a second embodiment of the present invention is different from the first embodiment in that: the U-shaped drain pipe 200 is provided with a first communicating valve 202, the end of which is communicated to the hot well 203, the first communicating valve 202 is used for opening and closing the U-shaped drain pipe 200, and the condensed water in the shaft seal heater 100 is discharged to the hot well 203 through the U-shaped drain pipe 200.
Further, automatic drain pipe 300 is provided with a second communication valve 302, and second communication valve 302 is used for opening and closing automatic drain pipe 300. The automatic drain pipe 300 is further provided with a second bypass 303, the second bypass 303 is connected in parallel with the automatic drain 301, and is used for communicating the shaft seal heater 100 and the condenser 400 when the automatic drain 301 fails, and at this time, condensed water in the shaft seal heater 100 returns to the condenser 400 through the second bypass 303. The second bypass 303 is provided with a third communication valve 303a, and the third communication valve 303a opens and closes the second bypass 303. Automatic steam trap 301 both sides all are provided with stop valve 304, and when automatic steam trap 301 trouble, close the stop valve 304 that sets up at its upper reaches and set up the stop valve 304 at its downstream, can carry out online maintenance or change automatic steam trap 301 this moment, close the stop valve 304 of upper reaches and make the unable automatic steam trap 301 that gets into of condensate water in the shaft seal heater 100, close the stop valve 304 of downstream and make the unable condenser 400 that gets into of air, guaranteed the vacuum state of system.
Example 3
Referring to fig. 1 to 3, a third embodiment of the present invention is different from the first two embodiments: the condenser 400 is communicated to the hot well 203, and condensed water stored in the condenser 400 is finally discharged to the hot well 203.
Further, be provided with ascending blast pipe 201a on the U type drain pipe 201, be provided with check valve 201b on the blast pipe 201a, water and steam mixture get into U type drain pipe 200 in the shaft seal heater 100, water circulates to U type drain pipe 201 lower part under self action of gravity, steam is stopped on liquid level upper portion, the intraductal gas pressure of U type drain pipe 201 is greater than outside pipe atmospheric pressure, check valve 201b opens, steam is discharged from blast pipe 201a, the back check valve 201b that discharges closes prevents that outside gas from getting into U type drain pipe 201, blast pipe 201a can effectively discharge the steam in U type drain pipe 201, prevent to produce a large amount of bubbles in the U type drain pipe 201, influence hydrophobic effect.
Further, the automatic steam trap 301 adopts a free floating ball type steam trap, has a wide working pressure difference range, can be used for draining water under the condition of extremely low pressure difference of the shaft seal heater 100 so as to achieve absolute zero leakage, has long service life, and can reliably and stably work on the automatic steam trap 300 for a long period.
It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a steam turbine low pressure cylinder shaft seal drainage device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a shaft seal heater (100) provided with a drain port (101);
the U-shaped drain pipeline (200) comprises a U-shaped drain pipe (201), the highest point of the U-shaped drain pipe (201) is higher than the drain port (101) and lower than the top of the shaft seal heater (100), and the U-shaped drain pipeline (200) is communicated with the drain port (101);
the automatic drain pipeline (300) comprises an automatic drain device (301), and the automatic drain pipeline (300) is communicated with the shaft seal heater (100) and the condenser (400).
2. The steam turbine low pressure cylinder gland seal drain of claim 1, wherein: the U-shaped drain pipeline (200) is provided with a first communicating valve (202), and the tail end of the first communicating valve is communicated to a hot well (203).
3. The steam turbine low pressure cylinder gland seal drain of claim 2, wherein: and a second communicating valve (302) is arranged on the automatic drainage pipeline (300).
4. The steam turbine low pressure cylinder shaft seal drainage device of claim 2 or 3, characterized in that: the automatic drainage pipeline (300) is further provided with a second bypass (303), and the second bypass (303) is connected with the automatic steam trap (301) in parallel.
5. The steam turbine low pressure cylinder gland seal drain of claim 4, wherein: a third communication valve (303a) is provided in the second bypass (303).
6. The steam turbine low pressure cylinder gland seal drain of claim 5, wherein: and stop valves (304) are arranged on both sides of the automatic steam trap (301).
7. The steam turbine low pressure cylinder gland seal drain of claim 5 or 6, wherein: the condenser (400) is communicated to the hot well (203).
8. The steam turbine low pressure cylinder shaft seal drainage arrangement of claim 7 wherein: an exhaust pipe (201a) inclining upwards is arranged on the U-shaped drain pipe (201), and a one-way valve (201b) is arranged on the exhaust pipe (201 a).
9. The steam turbine low pressure cylinder gland seal drain of claim 8, wherein: the automatic steam trap (301) is a free floating ball type steam trap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121613245.3U CN215256352U (en) | 2021-07-15 | 2021-07-15 | Steam turbine low pressure cylinder shaft seal drainage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121613245.3U CN215256352U (en) | 2021-07-15 | 2021-07-15 | Steam turbine low pressure cylinder shaft seal drainage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215256352U true CN215256352U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121613245.3U Expired - Fee Related CN215256352U (en) | 2021-07-15 | 2021-07-15 | Steam turbine low pressure cylinder shaft seal drainage device |
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| CN (1) | CN215256352U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382558A (en) * | 2021-12-24 | 2022-04-22 | 中国电建集团河南省电力勘测设计院有限公司 | Steam-leakage-dischargeable steam seal heater device and control method thereof |
-
2021
- 2021-07-15 CN CN202121613245.3U patent/CN215256352U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382558A (en) * | 2021-12-24 | 2022-04-22 | 中国电建集团河南省电力勘测设计院有限公司 | Steam-leakage-dischargeable steam seal heater device and control method thereof |
| CN114382558B (en) * | 2021-12-24 | 2024-02-13 | 中国电建集团河南省电力勘测设计院有限公司 | Steam seal heater device capable of exhausting steam and control method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211221 |