Steam turbine main steam pipeline purging structure
By designing a steam turbine main steam pipe purge structure including a silencer, sound-absorbing cotton, intake pipe and outlet pipe, the problem of inefficiency of traditional methods is solved, and efficient and low-noise pipe cleaning is achieved, avoiding damage to the cylinder thread. .
Patent Information
- Application Number
- CN202420414403.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-03-05
AI Technical Summary
The traditional method of purge of main steam pipes of steam turbines relies on manual disassembly of main steam doors, which is inefficient and frequent operations increase the workload of workers and may damage the cylinder thread.
A steam pipe purge structure of the main steam pipe of the steam turbine is designed. By setting a silencer, sound absorbing cotton, air intake pipe and air outlet pipe on the steam pipe, the air flow blown out by the air blowing equipment is used to purify the dust in the pipe, reduce noise, and pass Replace parts to complete the purge work, avoiding the removal of the main steam door.
It has achieved simplified operation, improved pipe cleaning efficiency, reduced the impact of noise on staff, and avoided damage to cylinder threads.
Smart Images
Figure CN222326096U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steam turbine pipeline purging, in particular to a steam turbine main steam pipeline purging structure. Background Art
[0002] Steam turbines are key equipment for energy conversion and are widely used in power, environmental protection projects and other fields. The cleanliness of the steam pipe of the steam turbine is crucial to the normal operation of the equipment. After the steam supply boiler is overhauled, the steam pipe must be purged to prevent impurities in the boiler from entering the steam turbine through the steam pipe, causing damage to the impeller inside the turbine. The traditional pipeline purging method mainly relies on manual disassembly of the main steam valve and then installation of the purge pipe. This method is not only inefficient, but also reduces the service life of the turbine cylinder thread. Due to the planned overhaul twice a year, the main steam valve is frequently disassembled and the operation process is cumbersome, which invisibly increases the workload of the staff. For this reason, we proposed a steam turbine main steam pipe purging structure. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a steam turbine main steam pipeline purging structure. The utility model solves the problem that the traditional pipeline purging method mainly relies on manual disassembly of the main steam valve and then installation of the purging pipeline, which is not only inefficient but also reduces the service life of the turbine cylinder thread. Due to the planned maintenance twice a year, the main steam valve is frequently disassembled, the operation process is cumbersome, and the workload of the staff is increased invisibly.
[0004] A steam turbine main steam pipeline purge structure in the utility model comprises a steam turbine cylinder, a steam turbine main steam valve is arranged on one side of the steam turbine cylinder, a first flange is arranged below the steam turbine main steam valve, a connecting pipe is arranged below the first flange, a second flange matching the first flange is arranged above the connecting pipe, a third flange is arranged below the connecting pipe, a main steam pipeline is arranged below the third flange, a fourth flange matching the third flange is arranged above the main steam pipeline, an exhaust pipe is inserted at one side of the lower end of the connecting pipe, a silencer is sleeved on the outer side of one end of the exhaust pipe located in the connecting pipe, and a plurality of silencer holes arranged in a matrix are opened on the silencer.
[0005] In the above scheme, sound-absorbing cotton is arranged on the inner side of the silencer, and a through hole matching the silencer is opened on the sound-absorbing cotton.
[0006] In the above solution, a fifth flange is provided at one end of the air outlet pipe outside the connecting pipe, a sixth flange is provided at a side of the fifth flange away from the air outlet pipe, and the sixth flange is connected to the air inlet pipe.
[0007] In the above solution, the air inlet pipe is connected to the threaded pipe at the side away from the sixth flange.
[0008] In the above solution, an end cover is provided on the side of the fifth flange away from the air outlet pipe, and the fifth flange and the end cover are fixedly connected by bolts.
[0009] In the above solution, the first flange and the second flange, the third flange and the fourth flange, and the fifth flange and the sixth flange are all fixedly connected by bolts.
[0010] In the above solution, a valve body is provided at the upper end of the connecting pipe.
[0011] In the above solution, sealing rings are provided between the first flange and the second flange, between the third flange and the fourth flange, and between the fifth flange and the sixth flange.
[0012] The advantages and beneficial effects of the utility model are as follows: the utility model provides a purge structure for the main steam pipeline of a steam turbine. When the steam pipeline of the steam turbine needs to be cleaned, the valve body is closed, the end cover is removed, the fifth flange is connected to the sixth flange, and the threaded pipe is externally connected to the blowing device. The gas blown out by the blowing device can enter the main steam pipeline through the air inlet pipe and the air outlet pipe. The airflow blown out from the air outlet pipe can purge the dust inside the main steam pipeline. The silencer and the silencer hole can reduce the noise of the airflow blown out from the inside of the air outlet pipe, thereby reducing the impact of noise on the environment of the workers. This purge structure has a simple structure, is easy to operate, and has a good noise reduction effect. The purge work of the main steam pipeline can be completed by replacing the components connected to the fifth flange. Compared with the traditional replacement of the main steam valve, it avoids damage to the threads of the turbine cylinder and effectively improves the cleaning efficiency of the main steam pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0014] Figure 1 This is a first structural schematic diagram of the utility model;
[0015] Figure 2 It is a second structural schematic diagram of the utility model;
[0016] Figure 3 It is a partial cross-sectional view of the utility model;
[0017] Figure 4 This is a schematic structural diagram of part A of the utility model.
[0018] In the figure: 1. Steam turbine cylinder 2. Steam turbine main valve 3. First flange 4. Connecting pipe
[0019] 5. Second flange 6. Sealing ring 7. Third flange 8. Main steam pipe
[0020] 9. Fourth flange 10. Exhaust pipe 11. Silencer 12. Silencer hole
[0021] 13. Sound-absorbing cotton 14. Through hole 15. Fifth flange 16. Sixth flange
[0022] 17. Inlet pipe 18. Threaded pipe 19. End cover 20. Valve body
[0023] 21. Bolts. DETAILED DESCRIPTION
[0024] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.
[0025] like Figure 1-4 As shown, the utility model is a steam turbine main steam pipeline purge structure, comprising a steam turbine cylinder 1, a steam turbine main steam valve 2 is arranged on one side of the steam turbine cylinder 1, a first flange 3 is arranged below the steam turbine main steam valve 2, a connecting pipe 4 is arranged below the first flange 3, a second flange 5 matching the first flange 3 is arranged above the connecting pipe 4, a third flange 7 is arranged below the connecting pipe 4, a main steam pipeline 8 is arranged below the third flange 7, the steam turbine main steam valve 2 and the main steam pipeline 8 are connected to each other through the arrangement of the connecting pipe 4, A fourth flange 9 matching the third flange 7 is provided above the main steam pipe 8, an outlet pipe 10 is inserted at one side of the lower end of the connecting pipe 4, and a silencer 11 is sleeved on the outer side of one end of the outlet pipe 10 located inside the connecting pipe 4. The silencer 11 is provided with a plurality of silencer holes 12 arranged in a matrix. The gas entering and exiting the outlet pipe 10 can clean the dust inside the connecting pipe 4 and the main steam pipe 8, and the silencer 11 and the silencer holes 12 can reduce the noise of the airflow blown out from the inside of the outlet pipe 10, thereby reducing the impact of noise on the environment of the staff.
[0026] A sound-absorbing cotton 13 is arranged inside the silencer 11 , and a through hole 14 matching the silencer 11 is opened on the sound-absorbing cotton 13 . The arrangement of the sound-absorbing cotton 13 further increases the overall noise reduction function of the purge structure.
[0027] The outlet pipe 10 is provided with a fifth flange 15 at one end outside the connecting pipe 4, and a sixth flange 16 is provided on the side of the fifth flange 15 away from the outlet pipe 10. The sixth flange 16 is connected to the inlet pipe 17. The fifth flange 15 and the sixth flange 16 cooperate with each other, so that the outlet pipe 10 and the inlet pipe 17 are connected to each other, and an airflow for blowing away dust can be injected into the outlet pipe 10 through the inlet pipe 17.
[0028] The air inlet pipe 17 is connected to a threaded pipe 18 at a side away from the sixth flange 16 . The arrangement of the threaded pipe 18 makes it easier to connect an external air blowing device to the air inlet pipe 17 .
[0029] An end cover 19 is provided on the side of the fifth flange 15 away from the exhaust pipe 10 . The fifth flange 15 and the end cover 19 are fixedly connected by bolts 21 . When the steam turbine is in normal use, the fifth flange 15 can be sealed by the end cover 19 .
[0030] The first flange 3 and the second flange 5, the third flange 7 and the fourth flange 9, and the fifth flange 15 and the sixth flange 16 are fixedly connected by bolts 21. The provision of the bolts 21 makes it easy to install and disassemble the first flange 3 and the second flange 5, the third flange 7 and the fourth flange 9, and the fifth flange 15 and the sixth flange 16.
[0031] A valve body 20 is disposed at the upper end of the connecting pipe 4 , and the valve body 20 can control the opening and closing of the connecting pipe 4 .
[0032] Sealing rings 6 are provided between the first flange 3 and the second flange 5, the third flange 7 and the fourth flange 9, and the fifth flange 15 and the sixth flange 16. The provision of the sealing rings 6 effectively increases the sealing between the first flange 3 and the second flange 5, the third flange 7 and the fourth flange 9, and the fifth flange 15 and the sixth flange 16.
[0033] Specifically, in the utility model, when the steam turbine is in normal use, the valve body 20 is in an open state, and the end cover 19 seals the fifth flange 15. When the steam pipeline of the steam turbine needs to be cleaned, the valve body 20 is closed, the end cover 19 is removed, and the fifth flange 15 is connected to the sixth flange 16, so that the air inlet pipe 17 and the threaded pipe 18 are installed on the air outlet pipe 10, and the air outlet pipe 10 and the air inlet pipe 17 are interconnected. The threaded pipe 18 is externally connected to an air blowing device, and the gas blown out by the air blowing device can enter the main steam pipeline 8 through the air inlet pipe 17 and the air outlet pipe 10. At this time, the airflow blown out from the air outlet pipe 10 can purge the dust inside the main steam pipeline 8, and the silencer 11 and the silencer hole 12 can reduce the noise of the airflow blown out from the inside of the air outlet pipe 10, thereby reducing the impact of noise on the environment of the staff. The main steam pipe 8 can be purged by replacing the components connected to the fifth flange 15. Compared with the traditional replacement of the main steam valve, it avoids damage to the turbine cylinder thread and effectively improves the cleaning efficiency of the main steam pipe 8.
[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A steam turbine main steam pipe purging structure, comprising a steam turbine cylinder (1), characterized in that: A main steam valve (2) of the steam turbine is provided on one side of the steam turbine cylinder (1), a first flange (3) is provided below the main steam valve (2), a connecting pipe (4) is provided below the first flange (3), a second flange (5) matching the first flange (3) is provided above the connecting pipe (4), a third flange (7) is provided below the connecting pipe (4), a main steam pipe (8) is provided below the third flange (7), a fourth flange (9) matching the third flange (7) is provided above the main steam pipe (8), an air outlet pipe (10) is inserted at one side of the lower end of the connecting pipe (4), a silencer (11) is sleeved on the outer side of one end of the air outlet pipe (10) located inside the connecting pipe (4), and a plurality of silencer holes (12) arranged in a matrix are provided on the silencer (11).
2. A steam turbine main steam pipeline purging structure according to claim 1, characterized in that: A sound-absorbing cotton (13) is arranged inside the silencer (11), and a through hole (14) matching the silencer (11) is opened on the sound-absorbing cotton (13).
3. A steam turbine main steam pipeline purging structure according to claim 1, characterized in that: The outlet pipe (10) is provided with a fifth flange (15) at one end outside the connecting pipe (4), and the fifth flange (15) is provided with a sixth flange (16) at a side away from the outlet pipe (10), and the sixth flange (16) is connected to the inlet pipe (17).
4. A steam turbine main steam pipeline purging structure according to claim 3, characterized in that: The air inlet pipe (17) is connected to the threaded pipe (18) at a side away from the sixth flange (16).
5. A steam turbine main steam pipeline purging structure according to claim 3, characterized in that: An end cover (19) is provided on the side of the fifth flange (15) away from the air outlet pipe (10), and the fifth flange (15) and the end cover (19) are fixedly connected by bolts (21).
6. A steam turbine main steam pipeline purging structure according to claim 3, characterized in that: The first flange (3) and the second flange (5), the third flange (7) and the fourth flange (9), and the fifth flange (15) and the sixth flange (16) are all fixedly connected by bolts (21).
7. A steam turbine main steam pipeline purging structure according to claim 1, characterized in that: A valve body (20) is provided at the upper end of the connecting pipe (4).
8. A steam turbine main steam pipeline purging structure according to claim 6, characterized in that: Sealing rings (6) are provided between the first flange (3) and the second flange (5), between the third flange (7) and the fourth flange (9), and between the fifth flange (15) and the sixth flange (16).