Gas turbine exhaust passage with high safety performance

Abstract

The application relates to a gas turbine smoke exhaust channel with high safety performance, which comprises a chimney body, a plurality of spiral plates are uniformly arranged on the outer surface of the chimney body in the circumferential direction, and the plurality of spiral plates are parallel to the axis direction of the chimney body. The application has the effect of improving the safety performance of the smoke exhaust channel.

Description

Technical Field

[0001] This application relates to the field of gas turbine exhaust technology, and in particular to a gas turbine exhaust channel with high safety performance. Background Technology

[0002] A gas turbine is a power unit that converts the chemical energy of fuel into mechanical energy. It draws in air through a compressor, compresses it, and then mixes it with fuel in a combustion chamber to produce high-temperature, high-pressure gas. This gas drives a turbine to output power. Gas turbines are widely used in power generation, aerospace, and industrial drives. During operation, they generate a large amount of high-temperature flue gas, which must be discharged through a dedicated exhaust system to ensure normal operation of the unit and prevent the high-temperature flue gas from impacting equipment and the environment.

[0003] In existing technologies, exhaust channels are mainly tubular structures consisting of a chimney body. One end of the chimney body is connected to the exhaust port of the gas turbine, and the other end extends to the high altitude or a designated emission area.

[0004] However, due to the height of the chimney, during strong winds, the airflow around the chimney body creates alternating vortices at its tail. These periodically changing vortices exert a lateral alternating force on the chimney. When the frequency of this alternating force approaches the natural frequency of the chimney body, resonance occurs, causing the chimney to vibrate violently. Prolonged resonance can cause fatigue damage to the chimney casing, leading to cracks, deformation, and other problems. This reduces the safety performance of the exhaust duct and seriously threatens the safe operation of the entire exhaust system, indicating a significant deficiency. Utility Model Content

[0005] To improve the safety performance of exhaust channels, this application provides a gas turbine exhaust channel with high safety performance.

[0006] This application provides a high-safety-performance gas turbine exhaust channel using the following technical solution:

[0007] A gas turbine exhaust duct with high safety performance includes a chimney body, wherein a plurality of spiral plates are uniformly arranged circumferentially on the outer surface of the chimney body, and the plurality of spiral plates are parallel to the axial direction of the chimney body.

[0008] By adopting the above technical solution, in strong wind weather, multiple spiral plates can guide the airflow generated by the strong wind to rise in a spiral shape, thereby reducing the lateral wind load generated by the airflow on the outer surface of the chimney body, reducing the possibility of resonance with the chimney body, thereby reducing fatigue damage to the chimney body caused by resonance, and improving the safety performance of the chimney body.

[0009] Optionally, each of the spiral plates is disposed on the outer surface of the chimney body by a plurality of fastening components. The plurality of fastening components are distributed along the length direction of the spiral plate. The fastening components include a fastening plate one disposed on the spiral plate, and a fastening plate two disposed on the outer surface of the chimney body corresponding to the plurality of fastening plates one. The fastening plates one and the fastening plates two are detachably connected by connecting bolts.

[0010] By adopting the above technical solution, multiple fastening components form a fixed structure with multiple points of uniform force along the length of the spiral plate, which disperses the force on the spiral plate under strong wind impact, reduces the possibility of the spiral plate loosening under strong wind. At the same time, the spiral plate can be quickly separated from the chimney body by disassembling the connecting bolts, which is convenient for individual replacement when the spiral plate has problems such as local wear, corrosion or deformation.

[0011] Optionally, positioning rings are provided on both opposite sides of the main body of the chimney along the axial direction, and the spiral plate is detachably mounted on the positioning rings via a connecting assembly.

[0012] By adopting the above technical solution, when installing the spiral plate, the end of the spiral plate closest to the positioning ring is first installed through the connecting component. Then, the other end of the spiral plate is installed on another positioning ring according to the positions of multiple fastening components. The positioning ring provides guidance for the starting and ending points of the spiral plate installation, ensuring that multiple spiral plates are evenly distributed along the circumference of the chimney body, reducing the possibility of inconsistent spacing between spiral plates due to installation deviation, which may affect the airflow guidance effect.

[0013] Optionally, the connecting assembly includes a connecting plate disposed on the spiral plate, and a connecting seat that is inserted into the connecting plate on the side of the positioning ring facing the spiral plate. The connecting plate and the connecting seat are provided with interconnecting connecting grooves. A pin is slidably connected inside the connecting groove. One end of the pin is provided with a stop block, and the other end is provided with a threaded section. A nut is threadedly connected to the outer surface of the threaded section. A threaded groove that is threadedly engaged with the nut is provided on the side of the connecting groove near the nut.

[0014] By adopting the above technical solution, when connecting the spiral plate and the positioning ring, the connecting plate is inserted into the corresponding connecting seat. Then, the worker holds the stop block and inserts the pin into the connecting groove. When the stop block abuts against the outer surface of the connecting seat, the worker screws the nut into the threaded groove. At this time, the nut is screwed on the outer surface of the threaded section, thus realizing the fastening installation of the connecting plate in the connecting seat. When separating the spiral plate and the positioning ring, simply unscrew the nut and pull out the pin, then pull the connecting plate to detach it from the connecting seat. This realizes the quick assembly and disassembly of the spiral plate on the positioning ring, which is convenient for the maintenance and replacement of the spiral plate.

[0015] Optionally, the outer surface of the chimney body is provided with multiple annular platforms, and the annular platforms are provided with clearance grooves for the spiral plates to pass through. The fastening components are disposed inside the clearance grooves. The multiple annular platforms are connected by vertical ladders, the top of which extends to the top of the chimney body and the bottom of which extends to the bottom of the chimney body.

[0016] By adopting the above technical solution, when disassembling and assembling the spiral plates, workers can reach the annular platforms at different locations via vertical ladders. Finally, they can disassemble and assemble the fastening components on multiple spiral plates via the annular platforms. This makes it easier for workers to disassemble or install the spiral plates on the main body of the chimney, thus improving the convenience of construction.

[0017] Optionally, the outer surface of the annular platform is provided with a circumferential enclosure, and the side of the vertical ladder away from the main body of the chimney is provided with a vertical enclosure.

[0018] By adopting the above technical solutions, the installation of circumferential and vertical barriers can protect workers and prevent them from falling from heights.

[0019] Optionally, the surface of the spiral plate is covered with an epoxy resin anti-corrosion coating.

[0020] By adopting the above technical solution, the epoxy resin coating has good adhesion and wear resistance. When strong winds carry sand and dust particles to impact the surface of the spiral plate, it can play a certain role in buffering and protecting it, reducing the wear on the surface of the spiral plate and improving the service life of the spiral plate.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. This application provides multiple spiral plates on the outer surface of the chimney body. In strong winds, the spiral plates can guide the airflow generated by the strong wind to rise in a spiral shape, thereby reducing the lateral wind load generated by the airflow on the outer surface of the chimney body, reducing the possibility of resonance with the chimney body, thereby reducing fatigue damage to the chimney body caused by resonance, and improving the safety performance of the chimney body.

[0023] 2. By setting fastening components, multiple fastening components form a fixed structure with multiple points of uniform force along the length of the spiral plate, which disperses the force on the spiral plate under strong wind impact and reduces the possibility of the spiral plate loosening under strong wind.

[0024] 3. This application sets up a positioning ring and connecting components. The positioning ring provides guidance for the installation start and end points of the spiral plates, ensuring that multiple spiral plates are evenly distributed along the circumference of the chimney body. This reduces the possibility that inconsistent spacing between the spiral plates due to installation deviations may affect the airflow guidance effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this application.

[0026] Figure 2 This is a cross-sectional view of the connector in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the spiral plate in an embodiment of this application.

[0028] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0029] Explanation of reference numerals in the attached drawings: 1. Chimney body; 2. Positioning ring; 3. Connecting assembly; 31. Connecting plate; 32. Connecting seat; 33. Pin post; 331. Threaded section; 34. Stop block; 35. Nut; 4. Spiral plate; 5. Connecting groove; 51. Threaded groove; 6. Fastening assembly; 61. Fastening plate one; 62. Fastening plate two; 63. Connecting bolt; 7. Annular platform; 71. Circumferential enclosure; 72. Clearance groove; 8. Vertical ladder; 81. Vertical enclosure. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0031] This application discloses a gas turbine exhaust channel with high safety performance.

[0032] Reference Figure 1 A high-safety gas turbine exhaust channel includes a chimney body 1, which is vertically arranged. Positioning rings 2 are fixedly welded to both ends of the chimney body 1 along the axial direction. The positioning rings 2 are fixedly sleeved on the outer surface of the chimney body 1.

[0033] Reference Figure 1 and Figure 2 Multiple spiral plates 4 are detachably connected between the two positioning rings 2 via a connecting component 3. In this embodiment, there are four spiral plates 4, which are evenly distributed along the outer periphery of the chimney body 1, with each spiral plate 4 parallel to the axial direction of the chimney body 1.

[0034] Reference Figure 1 and Figure 2 The outer surface of the spiral plate 4 is coated with an epoxy resin anti-corrosion coating. The epoxy resin coating has good adhesion and wear resistance, which reduces the wear on the surface of the spiral plate 4 and improves the service life of the spiral plate 4.

[0035] During strong winds, the four spiral plates 4 can guide the airflow generated by the strong wind to rise in a spiral shape, thereby reducing the lateral wind load generated by the airflow on the outer surface of the chimney body 1, thus reducing fatigue damage to the chimney body 1 caused by resonance and improving the safety performance of the chimney body 1.

[0036] Reference Figure 1 and Figure 2 The connecting component 3 includes a connecting plate 31 fixedly connected to the end of the spiral plate 4. A connecting seat 32 is fixedly connected to the side of the positioning ring 2 facing the spiral plate 4. The connecting seat 32 is U-shaped and plugs into the connecting plate 31. The four connecting seats 32 are evenly distributed around the circumference of the positioning ring 2. The connecting seats 32 on the two positioning rings 2 provide guidance for the starting and ending points of the installation of the spiral plate 4, ensuring that the multiple spiral plates 4 are evenly distributed around the circumference of the chimney body 1, reducing the possibility that the inconsistent spacing between the spiral plates 4 due to installation deviation will affect the airflow guidance effect.

[0037] Reference Figure 1 and Figure 2 The connecting plate 31 and the connecting seat 32 are provided with interconnected connecting grooves 5. A pin 33 is slidably connected inside the connecting groove 5. One end of the pin 33 is fixedly connected to a stop 34, and the other end is provided with a threaded section 331. The threaded section 331 is coaxially arranged with the pin. A nut 35 is threadedly connected to the outer surface of the threaded section 331. A threaded groove 51 is provided in the connecting groove 5 near the nut 35, which is threadedly engaged with the nut 35. When the nut 35 is threadedly connected inside the threaded groove 51, the stop 34 abuts against the outer surface of the connecting seat 32.

[0038] When connecting the spiral plate 4 and the positioning ring 2, the connecting plate 31 is inserted into the corresponding connecting seat 32. Then, the worker holds the stop block 34 and inserts the pin 33 into the connecting groove 5. When the stop block 34 abuts against the outer surface of the connecting seat 32, the worker screws the nut 35 into the threaded groove 51. At this time, the nut 35 is screwed onto the outer surface of the threaded section 331, thus achieving the fastening of the connecting plate 31 in the connecting seat 32. When separating the spiral plate 4 and the positioning ring 2, simply unscrew the nut 35 and pull out the pin 33, then pull the connecting plate 31 to detach it from the connecting seat 32. This achieves quick assembly and disassembly of the spiral plate 4 on the positioning ring 2, facilitating the maintenance and replacement of the spiral plate 4.

[0039] Reference Figure 1 and Figure 3 Each spiral plate 4 is fixedly connected to the outer surface of the chimney body 1 by multiple fastening components 6. In this embodiment, each spiral plate 4 is provided with four fastening components 6. The four fastening components 6 are distributed along the length of the spiral plate 4 to form a fixed structure with multiple points of uniform force, which disperses the force on the spiral plate 4 under strong wind impact and improves the stability of the spiral plate 4 on the chimney body 1.

[0040] Reference Figure 3 and Figure 4 The fastening assembly 6 includes a fastening plate 61 fixedly welded to the outer surface of the spiral plate 4. The outer surface of the chimney body 1 is fixedly welded with a fastening plate 62 corresponding to the multiple fastening plates 61. The fastening plates 61 and 62 are detachably connected by connecting bolts 63. In this embodiment, the connecting bolts 63 are high-strength friction bolts. When the spiral plate 4 is damaged due to wear, the worker can separate the spiral plate 4 from the chimney body 1 by disassembling the connecting bolts 63. Then, the spiral plate 4 can be quickly replaced by separating it from the positioning ring 2 through the connecting assembly 3.

[0041] Reference Figure 1 and Figure 3 Multiple annular platforms 7 are fixedly welded to the outer surface of the chimney body 1. In this embodiment, there are five annular platforms 7. The annular platforms 7 are fixedly fitted on the outer periphery of the chimney body 1. Each annular platform 7 is fixedly welded to the outer periphery with a circumferential barrier 71 to ensure the safety of workers when working on the annular platform 7.

[0042] Reference Figure 1 and Figure 3 Each annular platform 7 has a clearance groove 72 for the spiral plate 4 to pass through, and the fastening assembly 6 is installed inside the clearance groove 72. The five annular platforms 7 are connected by a vertical ladder 8, and a vertical enclosure is fixedly connected to the side of the vertical ladder 8 away from the chimney body 1.

[0043] Reference Figure 1 and Figure 3 An opening (not shown in the figure) is provided on the annular platform 7 for the vertical ladder 8 to pass through. Workers climb the vertical ladder 8 to reach the opening and enter the interior of the annular platform 7. The top of the vertical ladder 8 extends to the positioning ring 2 near the top of the chimney body 1, and the bottom extends to the positioning ring 2 near the bottom of the chimney body 1. Workers can climb the vertical ladder 8 to reach the annular platform 7 at different heights, and then inspect the fastening components 6 on different spiral plates 4 on the annular platform 7.

[0044] The implementation principle of a gas turbine exhaust duct with high safety performance according to the embodiments of this application is as follows: In strong wind weather, multiple spiral plates 4 can guide the airflow generated by the strong wind to rise in a spiral shape, thereby reducing the lateral wind load generated by the airflow on the outer surface of the chimney body 1, reducing the possibility of resonance with the chimney body 1, thereby reducing fatigue damage to the chimney body 1 caused by resonance, and improving the safety performance of the chimney body 1.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-safety gas turbine exhaust duct, comprising a chimney body (1), characterized in that, The outer surface of the chimney body (1) is uniformly provided with a plurality of spiral plates (4) along the circumference, and the plurality of spiral plates (4) are parallel to the axial direction of the chimney body (1).

2. The gas turbine exhaust duct with high safety performance according to claim 1, characterized in that, Each of the spiral plates (4) is provided on the outer surface of the chimney body (1) by a plurality of fastening components (6). The plurality of fastening components (6) are distributed along the length direction of the spiral plate (4). The fastening components (6) include a fastening plate one (61) provided on the spiral plate (4). The outer surface of the chimney body (1) is provided with a fastening plate two (62) corresponding to the plurality of fastening plates one (61). The fastening plates one (61) and the fastening plates two (62) are detachably connected by connecting bolts (63).

3. The gas turbine exhaust duct with high safety performance according to claim 1, characterized in that, The main body of the chimney (1) is provided with positioning rings (2) on both sides opposite to each other along the axial direction, and the spiral plate (4) is detachably mounted on the positioning rings (2) through the connecting assembly (3).

4. The gas turbine exhaust duct with high safety performance according to claim 3, characterized in that, The connecting assembly (3) includes a connecting plate (31) disposed on the spiral plate (4). The positioning ring (2) is provided with a connecting seat (32) on the side facing the spiral plate (4) that is inserted and engaged with the connecting plate (31). The connecting plate (31) and the connecting seat (32) are provided with interconnected connecting grooves (5). A pin (33) is slidably connected inside the connecting groove (5). One end of the pin (33) is provided with a stop (34), and the other end is provided with a threaded section (331). A nut (35) is threadedly connected to the outer surface of the threaded section (331). A threaded groove (51) is provided inside the connecting groove (5) near the nut (35) that is threadedly engaged with the nut (35).

5. A high-safety gas turbine exhaust duct according to claim 2, characterized in that, The outer surface of the chimney body (1) is provided with a plurality of annular platforms (7), and the annular platforms (7) are provided with clearance grooves (72) for the spiral plates (4) to pass through. The fastening components (6) are provided inside the clearance grooves (72). The plurality of annular platforms (7) are connected by vertical ladders (8). The top end of the vertical ladders (8) extends to the top end of the chimney body (1), and the bottom end extends to the bottom end of the chimney body (1).

6. A high-safety gas turbine exhaust duct according to claim 5, characterized in that, The outer surface of the annular platform (7) is provided with a circumferential enclosure (71), and the side of the vertical ladder (8) away from the main body of the chimney (1) is provided with a vertical enclosure.

7. A high-safety-performance gas turbine exhaust duct according to claim 1, characterized in that, The surface of the spiral plate (4) is covered with an epoxy resin anti-corrosion coating.

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