Variable frequency generator set control method and system

Abstract

The invention discloses a frequency conversion generator set control method and system, and relates to the technical field of frequency conversion generator sets, and the method comprises the following operation steps: S1, when it is detected that any group of commercial power transformers cannot output commercial power normally, or a generator set starting instruction is received, starting the generator set; an air inlet roller shutter, an air exhaust device and an air inlet axial flow fan in the generator set are started in sequence; and S2, after time is set, a generator set is started, the generator set replaces any set of commercial power transformer to output commercial power, and the smoke exhaust auxiliary equipment conducts self-cleaning and noise reduction. According to the variable frequency generator set control method and system, the air inlet roller shutter, the air exhaust device, the air inlet axial flow fan and other structures in the generator set are monitored, the working state of the generator set is presented in real time, smoke exhaust auxiliary equipment conducts self-cleaning and noise reduction, the operation reliability of the air inlet auxiliary equipment, the air exhaust auxiliary equipment, the smoke exhaust auxiliary equipment and other auxiliary equipment is guaranteed, and the service life of the generator set is prolonged. And the control efficiency of the variable-frequency generator set is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of variable frequency generator sets, and in particular to a control method and system for a variable frequency generator set. Background Art

[0002] The safe and stable operation of the generator not only requires high reliability, but also places the same reliability requirements on the generator's auxiliary equipment, especially the key auxiliary equipment such as air intake, exhaust and smoke exhaust. Failure of any auxiliary equipment may cause the generator to malfunction or malfunction, and even cause a production safety accident.

[0003] For example, the patent entitled: A generator set control method and system (patent application number: CN201810348188.7) discloses a generator set control method and system, in which the program control unit, electrical control unit and mechanical control unit are seamlessly switched, effectively improving the reliability of the generator set; the soft manual, semi-automatic and fully automatic control modes in the program control unit can also be automatically switched with each other without disturbance; the auxiliary equipment such as the air inlet roller shutter, exhaust device and air inlet axial fan in the generator set are effectively and automatically connected with the generator to realize fully automated control of the generator set, but this method lacks control over the operating status of the smoke exhaust auxiliary equipment, and its utilization efficiency needs to be improved.

[0004] Therefore, it is necessary to propose a variable frequency generator set control method and system to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a method and system for controlling a variable frequency generator set, so as to solve the problem that the method lacks control over the operating status of smoke exhaust auxiliary equipment and the utilization efficiency needs to be improved.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for controlling a variable frequency generator set, comprising the following steps: S1: When it is detected that any of the mains transformers cannot output mains power normally, or when a generator start command is received, the air inlet curtain, exhaust device and air inlet axial fan in the generator set are started in sequence, followed by the smoke exhaust auxiliary equipment in the generator set; S2. When it is detected that the air inlet roller shutter, the exhaust device and the air inlet axial flow fan are all working normally, the generator set is started after a set time, and the generator set replaces any group of mains transformers to output mains power, and the smoke exhaust auxiliary equipment performs self-cleaning and noise reduction.

[0007] The present invention also discloses a variable frequency generator set control system, which is applied to the above-mentioned variable frequency generator set control method, and also includes a variable frequency generator set body, a first smoke exhaust pipe is installed on the variable frequency generator set body, the top of the first smoke exhaust pipe is connected to the second smoke exhaust pipe, an airbag is fixedly connected to the inner wall of the first smoke exhaust pipe, the wall thickness at the inner circle of the airbag is alternately distributed thin and thick, and the bottom end of the first smoke exhaust pipe is equipped with a cover plate. When exhausting smoke, the smoke pushes the cover plate to move upward, the bottom end of the first smoke exhaust pipe opens, and the airbag expands to form a wave-like structure for reducing noise, and the airbag expands and contracts to shake off smoke and dust.

[0008] Preferably, the airbags are provided with two airbags distributed in an upper and lower manner, and a ring tube is fixedly provided between the two airbags. The ring tube is fixedly connected to the inner wall of the first smoke exhaust pipe. Air holes are opened at the upper and lower ends of the ring tube, and the airbags are connected to the ring tube through the corresponding air holes.

[0009] Preferably, a square tube is provided inside the first smoke exhaust pipe, a first air pipe is connected between the square tube and the ring tube, a sliding column is slidingly provided inside the square tube, the sliding column passes through the lower surface of the square tube, the cover plate is fixedly connected to the bottom end of the sliding column, a spring is provided inside the square tube, one end of the spring is fixedly connected to the top of the sliding column, and the other end of the spring is fixedly connected to the top of the square tube.

[0010] Preferably, a second air pipe is fixedly connected to the outer wall of the first smoke exhaust pipe, the second air pipe is communicated with the ring pipe, and a sealing cover is provided on the second air pipe.

[0011] Preferably, the inner diameter of the first smoke exhaust pipe is larger than the inner diameter of the second smoke exhaust pipe.

[0012] Preferably, a vertical roller is provided inside the second smoke exhaust pipe, and the vertical roller is distributed along the axial direction of the second smoke exhaust pipe. A side groove is provided on the outer wall of the vertical roller, and a plurality of side grooves are provided. The plurality of side grooves are evenly distributed around the vertical roller. A round rod is fixedly connected to the inside of the side groove, and a rotating block is rotatably connected to the round rod. The end of the rotating block away from the round rod is fixedly connected to a scraping strip for pushing and scraping the inner wall of the second smoke exhaust pipe. A torsion spring is mounted on the round rod, and one end of the torsion spring is fixedly connected to the round rod, and the other end of the torsion spring is fixedly connected to the rotating block.

[0013] Preferably, the top end of the second smoke exhaust pipe is fixedly connected to a bracket, the top of the bracket is fixedly connected to a baffle, and the outer diameter of the baffle is larger than the outer diameter of the second smoke exhaust pipe.

[0014] Preferably, the bottom of the baffle is rotatably connected to a rotating shaft, the rotating shaft is concentrically arranged with the second smoke exhaust pipe, the bottom end of the rotating shaft is fixedly connected to a fan blade, a support plate is fixedly connected to the rotating shaft, the vertical roller is rotatably connected to the support plate, a gear is fixedly connected to the vertical roller, and the top of the second smoke exhaust pipe is fixedly connected to a gear ring, and the gear is meshingly connected to the gear ring.

[0015] Preferably, the bottom end of the vertical roller is fixedly connected to an extrusion block, and the extrusion block cooperates with the airbag located at an upper position.

[0016] The technical effects and advantages of the present invention are as follows: 1. The present invention monitors the air intake roller curtain, exhaust device, air intake axial flow fan and other structures in the generator set to display the working status of the generator set in real time. The smoke exhaust auxiliary equipment also performs self-cleaning and noise reduction, thereby ensuring the operational reliability of the air intake, exhaust and smoke exhaust auxiliary equipment and improving the control efficiency of the variable frequency generator set. 2. When exhausting smoke, the airbag expands to form a wave-like structure to reduce noise. The smoke will be changed in trajectory and the noise reduction will be achieved through the collision effect. 3. When the inverter generator set stops, the airbag contracts to shake off the smoke and dust, while preventing the airbag from being in a continuously inflated state, thus extending its service life. The cover closes the bottom end of the first exhaust pipe to prevent smoke and dust from falling into the inverter generator set. 4. Set the inner diameter of the first exhaust pipe to be larger than that of the second exhaust pipe to ensure exhaust efficiency; 5. The restoring force of the torsion spring makes the scraper stick to the inner wall of the second exhaust pipe, ensuring the scraping effect. At the same time, when the scraper loses contact with the inner wall of the second exhaust pipe, the scraper quickly bounces back to its original position under the restoring force of the torsion spring, producing a shaking effect, which shakes off the smoke and dust remaining on the scraper, making it easier to push and scrape and clean it later. 6. Under the action of airflow, the vertical rollers rotate and revolve to scrape away the smoke and dust adhering to the inner wall of the second smoke exhaust pipe, keeping the inner wall of the second smoke exhaust pipe clean and ensuring the smooth discharge of smoke, thus improving the control efficiency of the variable frequency generator set. When the smoke blows the fan blades to rotate, the potential energy of the smoke can be reduced, thereby reducing noise. 7. When the vertical roller moves, with the cooperation of the extrusion block, the airbag expands and contracts to shake off the smoke and dust, avoid accumulation, and ensure smooth discharge of smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart of the control method of the variable frequency generator set of the present invention.

[0018] Figure 2 This is a structural diagram of the variable frequency generator set control system from one perspective of the present invention.

[0019] Figure 3 This is a structural diagram of the variable frequency generator set control system from another perspective of the present invention.

[0020] Figure 4 This is a schematic structural diagram of the first smoke exhaust pipe and the second smoke exhaust pipe of the present invention.

[0021] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure in the middle.

[0022] Figure 6 It is a schematic diagram of the square tube and sliding column structure of the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B in the middle.

[0024] Figure 8 For the present invention Figure 6 Enlarged schematic diagram of the structure at point C in the middle.

[0025] Figure 9 This is a schematic diagram of the second smoke exhaust pipe and square tube structure of the present invention.

[0026] Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the structure at point D in the middle.

[0027] Figure 11 It is a schematic diagram of the vertical roller and side groove structure of the present invention.

[0028] Figure 12 For the present invention Figure 11 Enlarged schematic diagram of the structure at E in the middle.

[0029] In the figure: 1. Frequency conversion generator set body; 2. First exhaust pipe; 3. Second exhaust pipe; 4. Ring pipe; 5. Air bag; 6. First air pipe; 7. Air hole; 8. Square tube; 9. Sliding column; 10. Cover plate; 11. Spring; 12. Bracket; 13. Second air pipe; 14. Sealing cover; 15. Baffle; 16. Rotating shaft; 17. Fan blade; 18. Support plate; 19. Vertical roller; 20. Side groove; 21. Round rod; 22. Rotating block; 23. Scraper; 24. Torsion spring; 25. Gear ring; 26. Gear; 27. Extrusion block. DETAILED DESCRIPTION

[0030] The present invention provides Figures 1 to 12 A variable frequency generator set control method shown includes the following steps: S1. When it is detected that any set of mains transformers cannot output mains power normally, or when a generator set start-up command is received, the air inlet curtain, exhaust device and air inlet axial fan in the generator set are started in sequence, and then the smoke exhaust auxiliary equipment in the generator set is put into operation.

[0031] During specific use, an instrument unit, a touch display unit, etc. are provided. The instrument unit is used to respectively detect the operating current and operating voltage of the air inlet curtain, exhaust device, air inlet axial fan and generator in the generator set to ensure the normal operation of the generator set.

[0032] The touch display unit is used to display the working status of the air inlet curtain, exhaust device, air inlet axial flow fan and generator in the generator set, and receive control instructions.

[0033] S2: If the air inlet curtain, exhaust device, and air inlet axial flow fan are all operating normally, the generator set will start after a set time. The generator set will replace any mains transformer to output mains power, and the smoke exhaust auxiliary equipment will perform self-cleaning and noise reduction. The set time can be adjusted according to specific usage, such as 3 to 5 seconds.

[0034] By monitoring the air inlet curtain, exhaust device, air inlet axial fan and other structures in the generator set, the working status of the generator set can be displayed in real time, and the smoke exhaust auxiliary equipment can be self-cleaned and noise reduced to ensure the operational reliability of the air inlet, exhaust and smoke exhaust auxiliary equipment, thereby improving the control efficiency of the variable frequency generator set.

[0035] The present invention also discloses a variable frequency generator set control system, which is applied to the above-mentioned variable frequency generator set control method, and also includes a variable frequency generator set body 1, on which a first smoke exhaust pipe 2 is installed, and the top of the first smoke exhaust pipe 2 is connected to a second smoke exhaust pipe 3, and smoke is discharged through the first smoke exhaust pipe 2 and the second smoke exhaust pipe 3.

[0036] Reference Figure 5 、 Figure 6 As shown, considering that the smoke dust in the smoke will adhere to the inner walls of the first smoke exhaust pipe 2 and the second smoke exhaust pipe 3, accumulation is likely to occur after long-term use, which can easily lead to poor smoke exhaust. In order to improve the smoke exhaust efficiency, an airbag 5 is fixedly connected to the inner wall of the first smoke exhaust pipe 2. The wall thickness at the inner circle of the airbag 5 is alternately thin and thick. When the airbag 5 is inflated, the thin part deforms more and the thick part deforms less. Therefore, the airbag 5 can expand to form a wavy structure for reducing noise. When the smoke contacts the airbag 5, its movement trajectory will be changed and the noise reduction process will be completed through the effect of collision.

[0037] The interior of the airbag 5 can be filled with an inert gas, such as helium, to provide a sound insulation effect.

[0038] The airbag 5 can be made of, but is not limited to, silicon nitrogen rubber, which is corrosion-resistant and can withstand temperatures above 500°C, and has excellent thermal stability. At the same time, actual use has verified that the flue gas temperature exhausted by the variable frequency generator set body 1 of the present invention is usually between 150 and 170°C, which does not affect the use of the airbag 5. In addition, high-temperature resistant heat-insulating coating can be sprayed on the airbag 5 to increase high-temperature resistance, which can be adjusted according to specific usage conditions.

[0039] Furthermore, the first smoke exhaust pipe 2 can be provided as a detachable structure, so as to facilitate replacement of the air bag 5 and the like, and can be adjusted according to specific usage conditions.

[0040] Reference Figure 5 、 Figure 6 As shown, two airbags 5 are provided, distributed in an upper and lower manner, and a ring tube 4 is fixedly provided between the two airbags 5. The ring tube 4 is fixedly connected to the inner wall of the first smoke exhaust pipe 2. Air holes 7 are provided at the upper and lower ends of the ring tube 4. The airbags 5 are connected to the ring tube 4 through the corresponding air holes 7. By providing the ring tube 4 and the air holes 7, the upper and lower airbags 5 are connected.

[0041] The bottom end of the first smoke exhaust pipe 2 is equipped with a cover plate 10, which can close the first smoke exhaust pipe 2. A square cylinder 8 is provided inside the first smoke exhaust pipe 2. A first air pipe 6 is connected between the square cylinder 8 and the ring pipe 4, and the first air pipe 6 also fixes the position of the square cylinder 8. A sliding column 9 is slidingly provided inside the square cylinder 8. The sliding column 9 passes through the lower surface of the square cylinder 8, and the cover plate 10 is fixedly connected to the bottom end of the sliding column 9.

[0042] A spring 11 is provided inside the square tube 8 , one end of the spring 11 is fixedly connected to the top of the sliding column 9 , and the other end of the spring 11 is fixedly connected to the top of the square tube 8 .

[0043] During actual use, the smoke will push the cover plate 10 to move upward, and the bottom end of the first smoke exhaust pipe 2 will open to allow the smoke to be discharged.

[0044] When the cover plate 10 moves upward, it pushes the slide column 9 to retract into the interior of the square tube 8, and the spring 11 is compressed. The gas inside the square tube 8 enters the interior of the annular tube 4 through the first air pipe 6, and then enters the upper and lower air bags 5 through the air hole 7. Since the wall thickness of the inner circle of the air bag 5 is alternately thin and thick, the air bag 5 expands to form a wave-like structure for reducing noise. The smoke will have its movement trajectory changed and the noise reduction process will be completed through the effect of collision.

[0045] When the variable frequency generator set body 1 stops, under the action of the return elastic force of the spring 11, the slide column 9 and the cover plate 10 are reset, and the airbag 5 contracts, so that the smoke and dust are shaken off, while preventing the airbag 5 from being in an inflated state continuously, thereby extending its service life; and the cover plate 10 closes the bottom end of the first smoke exhaust pipe 2 to prevent the smoke and dust from falling into the variable frequency generator set body 1, and the shaken-off smoke and dust can be discharged in the subsequent smoke exhaust process.

[0046] Reference Figure 7 As shown, a second air pipe 13 is fixedly connected to the outer wall of the first smoke exhaust pipe 2 , the second air pipe 13 is communicated with the ring pipe 4 , and a sealing cover 14 is fitted on the second air pipe 13 .

[0047] In addition, an air pump or the like can be regularly used to connect to the second air pipe 13 to replenish air inside the airbag 5; the airbag 5 can also be reciprocally inflated and pumped, so that the airbag 5 undergoes a greater degree of expansion and contraction switching changes, thereby improving cleaning efficiency.

[0048] Considering that the first smoke exhaust pipe 2 is provided with structures such as sliding column 9 and cover plate 10, which has a certain resistance, the inner diameter of the first smoke exhaust pipe 2 is set to be larger than the inner diameter of the second smoke exhaust pipe 3, and the inner diameter of the second smoke exhaust pipe 3 is appropriate to ensure exhaust efficiency.

[0049] To handle the smoke and dust inside the second smoke exhaust pipe 3, a vertical roller 19 is installed inside the second smoke exhaust pipe 3. The vertical roller 19 is distributed along the axial direction of the second smoke exhaust pipe 3. The outer wall of the vertical roller 19 is provided with a plurality of side grooves 20, which are evenly distributed around the vertical roller 19. A round rod 21 is fixedly connected to the inside of the side groove 20. A rotating block 22 is rotatably connected to the round rod 21. A scraper 23 for pushing and scraping the inner wall of the second smoke exhaust pipe 3 is fixedly connected to the end of the rotating block 22 away from the round rod 21.

[0050] Reference Figure 12 As shown, a torsion spring 24 is sleeved on the round rod 21 , one end of the torsion spring 24 is fixedly connected to the round rod 21 , and the other end of the torsion spring 24 is fixedly connected to the rotating block 22 .

[0051] Reference Figure 6 As shown, the top of the second smoke exhaust pipe 3 is fixedly connected to a bracket 12, and the top of the bracket 12 is fixedly connected to a baffle 15. The outer diameter of the baffle 15 is larger than the outer diameter of the second smoke exhaust pipe 3. The baffle 15 can prevent external impurities from falling vertically into the inside of the second smoke exhaust pipe 3.

[0052] The bottom of baffle 15 is rotatably connected to a rotating shaft 16, which is concentrically arranged with the second smoke exhaust pipe 3. A fan blade 17 is fixedly connected to the bottom end of rotating shaft 16. A support plate 18 is fixedly connected to rotating shaft 16, and a vertical roller 19 is rotatably connected to support plate 18. A gear 26 is fixedly connected to vertical roller 19, and a gear ring 25 is fixedly connected to the top of the second smoke exhaust pipe 3. Gear 26 is meshed with gear ring 25.

[0053] The fan blades 17, the gear 26, the gear ring 25 and other structures are arranged at the top end of the second smoke exhaust pipe 3 to facilitate the operator to perform cleaning and other operations.

[0054] The smoke enters the interior of the second smoke exhaust pipe 3 and is discharged from the top of the second smoke exhaust pipe 3. Under the action of the airflow, the fan blades 17 drive the rotating shaft 16 and the support plate 18 to rotate, and the vertical roller 19 revolves around the axis of the second smoke exhaust pipe 3; at the same time, since the gear 26 is meshed with the gear ring 25, the gear 26 drives the vertical roller 19 to rotate.

[0055] Reference Figure 9 , the vertical roller 19 rotates counterclockwise, and when the scraping strip 23 rotates to the lower right position and fits against the inner wall of the second smoke exhaust pipe 3, the smoke and dust on the inner wall of the second smoke exhaust pipe 3 will be pushed and scraped, and the reset elastic force of the torsion spring 24 makes the scraping strip 23 fit against the inner wall of the second smoke exhaust pipe 3, ensuring the pushing and scraping effect; then, under the squeezing effect of the inner wall of the second smoke exhaust pipe 3, the rotating block 22 rotates on the round rod 21, and the rotating block 22 and the scraping strip 23 are recovered to the inside of the corresponding side groove 20 without affecting the vertical roller 19's rotation; when the scraper strip 23 rotates to the upper right position, the rotating block 22 and the scraper strip 23 are gradually reset. When the scraper strip 23 is out of contact with the inner wall of the second smoke exhaust pipe 3, under the action of the reset elastic force of the torsion spring 24, the scraper strip 23 quickly bounces open and resets, producing a shaking effect, so that the smoke and dust remaining on the scraper strip 23 are shaken off, which is convenient for subsequent scraping and cleaning. At this time, the next scraper strip 23 is attached to the inner wall of the second smoke exhaust pipe 3, and continues to clean, and the smoke and dust pushed and scraped are discharged with the smoke.

[0056] Under the action of airflow, the vertical roller 19 revolves and rotates in coordination to push and scrape the smoke and dust attached to the inner wall of the second smoke exhaust pipe 3, so that the inner wall of the second smoke exhaust pipe 3 remains clean, ensuring smooth discharge of smoke, improving the efficiency of the variable frequency generator control, and when the smoke blows the fan blades 17 to rotate, it can reduce the potential energy of the smoke and reduce noise.

[0057] Reference Figure 6 As shown, the bottom end of the vertical roller 19 is fixedly connected with an extrusion block 27, and the extrusion block 27 cooperates with the air bag 5 located at the upper position.

[0058] During actual use, the vertical roller 19 drives the squeezing block 27 to move synchronously. When the squeezing block 27 contacts the airbag 5 at the upper position, it will squeeze the airbag 5 at the upper position, and the other positions of the airbag 5 and the airbag 5 at the lower position will expand to a certain extent; when the squeezing block 27 is out of contact with the airbag 5 at the upper position, the airbag 5 is reset due to its own elastic force. As the vertical roller 19 continues to move, the airbag 5 expands and contracts to shake off the smoke and avoid accumulation, ensuring that the smoke is discharged smoothly, and the shaken-off smoke is discharged with the smoke, thereby realizing the smoke treatment in the first smoke exhaust pipe 2.

[0059] Working principle: When the variable frequency generator set body 1 is running, the smoke pushes the cover plate 10 to move upward, and the bottom end of the first smoke exhaust pipe 2 opens to allow the smoke to be discharged; when the cover plate 10 moves upward, it will push the sliding column 9 to retract into the interior of the square cylinder 8, and the spring 11 is compressed. The gas inside the square cylinder 8 enters the interior of the annular tube 4 through the first air pipe 6, and then enters the upper and lower air bags 5 through the air hole 7. Since the wall thickness of the inner circle of the air bag 5 is alternately thin and thick, the air bag 5 expands to form a wave-like structure for reducing noise. The smoke will be changed in its trajectory and the noise reduction process will be completed through the effect of collision.

[0060] The smoke enters the interior of the second smoke exhaust pipe 3 and is discharged from the top of the second smoke exhaust pipe 3. Under the action of the airflow, the fan blades 17 drive the rotating shaft 16 and the support plate 18 to rotate, and the vertical roller 19 revolves around the axis of the second smoke exhaust pipe 3; at the same time, since the gear 26 is meshed with the gear ring 25, the gear 26 drives the vertical roller 19 to rotate. Figure 9 , the vertical roller 19 rotates counterclockwise, and when the scraping strip 23 rotates to the lower right position and fits against the inner wall of the second smoke exhaust pipe 3, the smoke and dust on the inner wall of the second smoke exhaust pipe 3 will be pushed and scraped, and the reset elastic force of the torsion spring 24 makes the scraping strip 23 fit against the inner wall of the second smoke exhaust pipe 3, ensuring the pushing and scraping effect; then, under the squeezing effect of the inner wall of the second smoke exhaust pipe 3, the rotating block 22 rotates on the round rod 21, and the rotating block 22 and the scraping strip 23 are recovered to the inside of the corresponding side groove 20 without affecting the vertical roller 19 rotates; when the scraper 23 rotates to the upper right position, the rotating block 22 and the scraper 23 gradually reset. When the scraper 23 loses contact with the inner wall of the second smoke exhaust pipe 3, under the action of the reset elastic force of the torsion spring 24, the scraper 23 quickly bounces back and resets, producing a shaking effect, so that the smoke and dust remaining on the scraper 23 are shaken off, which is convenient for subsequent scraping and cleaning. At this time, the next scraper 23 is attached to the inner wall of the second smoke exhaust pipe 3, continuing to clean, and the scraped smoke and dust are discharged with the smoke. Under the action of airflow, the vertical roller 19 rotates in coordination with the revolution and rotation to achieve the scraping of smoke and dust attached to the inner wall of the second smoke exhaust pipe 3, so that the inner wall of the second smoke exhaust pipe 3 remains clean, ensuring the smooth discharge of smoke, improving the efficiency of the variable frequency generator set control, and when the smoke blows the fan blades 17 to rotate, it can reduce the potential energy of the smoke and reduce noise.

[0061] The vertical roller 19 drives the squeezing block 27 to move synchronously. When the squeezing block 27 contacts the airbag 5 at the upper position, it will squeeze the airbag 5 at the upper position, and the other positions of the airbag 5 and the airbag 5 at the lower position will expand to a certain extent; when the squeezing block 27 is out of contact with the airbag 5 at the upper position, the airbag 5 is reset due to its own elastic force. As the vertical roller 19 continues to move, the airbag 5 expands and contracts to shake off the smoke and avoid accumulation, ensuring that the smoke is discharged smoothly, and the shaken-off smoke is discharged with the smoke, thereby realizing the smoke treatment in the first smoke exhaust pipe 2.

[0062] When the variable frequency generator set body 1 stops, under the action of the return elastic force of the spring 11, the slide column 9 and the cover plate 10 are reset, and the airbag 5 contracts, preventing the airbag 5 from being in an inflated state continuously and extending its service life; and the cover plate 10 closes the bottom end of the first smoke exhaust pipe 2 to prevent smoke and dust from falling into the variable frequency generator set body 1.

[0063] In addition, an air pump or the like can be regularly used to connect to the second air pipe 13 to replenish air inside the airbag 5; the airbag 5 can also be reciprocally inflated and sucked, so that the airbag 5 undergoes a large degree of expansion and contraction switching changes, thereby improving the cleaning efficiency.

Claims

1. A method for controlling a variable frequency generator set, characterized in that: The following steps are included: S1: When it is detected that any of the mains transformers cannot output mains power normally, or when a generator start command is received, the air inlet curtain, exhaust device and air inlet axial fan in the generator set are started in sequence, followed by the smoke exhaust auxiliary equipment in the generator set; S2. When it is detected that the air inlet roller shutter, the exhaust device and the air inlet axial flow fan are all working normally, the generator set is started after a set time, and the generator set replaces any group of mains transformers to output mains power, and the smoke exhaust auxiliary equipment performs self-cleaning and noise reduction.

2. A variable frequency generator set control system, characterized in that: The control method for a variable frequency generator set as claimed in claim 1 further comprises a variable frequency generator set body (1), a first smoke exhaust pipe (2) being installed on the variable frequency generator set body (1), a second smoke exhaust pipe (3) being connected to the top of the first smoke exhaust pipe (2), an air bag (5) being fixedly connected to the inner wall of the first smoke exhaust pipe (2), the wall thickness of the inner circle of the air bag (5) being alternately thin and thick, a cover plate (10) being provided at the bottom end of the first smoke exhaust pipe (2), and when exhausting smoke, the smoke pushes the cover plate (10) to move upward, the bottom end of the first smoke exhaust pipe (2) is opened, and the air bag (5) is expanded to form a wave-like structure for reducing noise, and the air bag (5) is switched between expansion and contraction to shake off smoke dust.

3. A variable frequency generator set control system according to claim 2, characterized in that: The airbags (5) are provided with two airbags distributed in an upper and lower manner, and a ring tube (4) is fixedly provided between the two airbags (5). The ring tube (4) is fixedly connected to the inner wall of the first smoke exhaust pipe (2). Air holes (7) are provided at both upper and lower ends of the ring tube (4), and the airbags (5) are communicated with the ring tube (4) through the corresponding air holes (7).

4. A variable frequency generator set control system according to claim 3, characterized in that: A square tube (8) is provided inside the first smoke exhaust pipe (2), and a first air pipe (6) is connected between the square tube (8) and the ring tube (4). A sliding column (9) is slidably provided inside the square tube (8), and the sliding column (9) passes through the lower surface of the square tube (8). The cover plate (10) is fixedly connected to the bottom end of the sliding column (9). A spring (11) is provided inside the square tube (8), and one end of the spring (11) is fixedly connected to the top of the sliding column (9), and the other end of the spring (11) is fixedly connected to the top of the square tube (8).

5. The variable frequency generator control system according to claim 3, characterized in that: A second air pipe (13) is fixedly connected to the outer wall of the first smoke exhaust pipe (2), the second air pipe (13) is in communication with the ring pipe (4), and a sealing cover (14) is fitted on the second air pipe (13).

6. A variable frequency generator set control system according to claim 2, characterized in that: The inner diameter of the first smoke exhaust pipe (2) is greater than the inner diameter of the second smoke exhaust pipe (3).

7. The variable frequency generator control system according to claim 3, characterized in that: A vertical roller (19) is provided inside the second smoke exhaust pipe (3), and the vertical roller (19) is distributed along the axial direction of the second smoke exhaust pipe (3). A side groove (20) is opened on the outer wall of the vertical roller (19), and a plurality of side grooves (20) are provided. The plurality of side grooves (20) are evenly distributed around the vertical roller (19). A round rod (21) is fixedly connected inside the side groove (20), and a rotating block (22) is rotatably connected to the round rod (21). An end of the rotating block (22) away from the round rod (21) is fixedly connected to a scraping strip (23) for pushing and scraping the inner wall of the second smoke exhaust pipe (3). A torsion spring (24) is mounted on the round rod (21), and one end of the torsion spring (24) is fixedly connected to the round rod (21), and the other end of the torsion spring (24) is fixedly connected to the rotating block (22).

8. A variable frequency generator set control system according to claim 7, characterized in that: The top end of the second smoke exhaust pipe (3) is fixedly connected to a bracket (12), and the top end of the bracket (12) is fixedly connected to a baffle (15), wherein the outer diameter of the baffle (15) is greater than the outer diameter of the second smoke exhaust pipe (3).

9. A variable frequency generator set control system according to claim 8, characterized in that: The bottom of the baffle (15) is rotatably connected to a rotating shaft (16), the rotating shaft (16) is concentrically arranged with the second smoke exhaust pipe (3), the bottom end of the rotating shaft (16) is fixedly connected to a fan blade (17), the rotating shaft (16) is fixedly connected to a support plate (18), the vertical roller (19) is rotatably connected to the support plate (18), the vertical roller (19) is fixedly connected to a gear (26), the top of the second smoke exhaust pipe (3) is fixedly connected to a gear ring (25), and the gear (26) is meshed with the gear ring (25).

10. A variable frequency generator set control system according to claim 9, characterized in that: The bottom end of the vertical roller (19) is fixedly connected to an extrusion block (27), and the extrusion block (27) cooperates with the air bag (5) located at an upper position.

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