Lifting fire extinguishing device in wind generating set

Abstract

A lifting fire extinguishing device in a wind generating set comprises a lifting mechanism and a powder discharging fire extinguishing mechanism. The lifting mechanism comprises two supporting sliding frames arranged in a wind power tower drum of the wind generating set, the two supporting sliding frames are distributed in parallel and arranged in the axial direction of the wind power tower drum, and racks distributed in the length direction of the supporting sliding frames are arranged on the outer side walls of the opposite faces of the two supporting sliding frames correspondingly. A supporting plate is arranged between the two supporting sliding frames, and the supporting plate is provided with a meshing driving assembly used for being meshed with the rack on the corresponding side to drive the supporting plate to slide and ascend and descend along the supporting sliding frames. The powder discharging and fire extinguishing mechanism comprises a powder barrel arranged on the supporting plate, a top cover is installed at the top of the powder barrel, and a powder discharging cover is connected to the top of the top cover; a powder conveying pipe penetrating through the top cover is arranged between the powder cylinder and the powder discharging cover; the upper end of the air inlet pipe penetrates through the supporting plate to be communicated with the powder barrel, and the lower end of the air inlet pipe is connected with an air tank through an electromagnetic valve. The fire extinguishing device can be rapidly lifted in the wind power tower drum to extinguish fire, and is high in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine operation and maintenance, in particular to a lifting fire extinguishing device in a wind turbine generator set. Background Art

[0002] There are usually many important electrical equipment installed in the tower of a wind turbine. From top to bottom, the tower is equipped with generators, nacelle hubs, main control cabinets, converters, and cables connecting various devices. However, electrical equipment and cables are prone to short circuits, overloads, and even spontaneous combustion when encountering special electrical faults. To ensure safety, it is necessary to extinguish the fire in time. There are two different firefighting schemes for extinguishing fires according to the location of the fire point: the first firefighting scheme for the top cabin of the wind turbine is to extinguish the fire by using an automatic gas fire extinguishing system in the top cabin. After the fire sensor in the top cabin senses it, the control valve connects the pipeline with heptafluoropropane compressed gas, and the heptafluoropropane compressed gas is sprayed out from the nozzle installed on the top of the cabin to extinguish the fire. The second firefighting scheme for the bottom of the tower is to extinguish the fire manually using a dry powder fire extinguisher. The third is that for the fire on the inner wall of the tower, the staff usually climbs to the fire area through the ladder installed on the inner wall of the tower and uses a dry powder fire extinguisher to extinguish the fire. However, the staff's climbing speed is limited during the fire-fighting process, which increases the time it takes to extinguish the fire. Moreover, the staff also needs to carry a dry powder fire extinguisher to climb to the fire point. There is a certain risk for the staff to climb on the ladder with a dry powder fire extinguisher and operate the dry powder fire extinguisher on the ladder to extinguish the fire. Utility Model Content

[0003] The utility model aims to provide a lifting fire extinguishing device in a wind power generator set which can realize rapid lifting and lowering in a wind power tower for extinguishing fire and has high safety.

[0004] In order to solve the above technical problems, the specific solution adopted by the utility model is a lifting fire extinguishing device in a wind turbine generator set, including a lifting mechanism and a powder discharge fire extinguishing mechanism arranged on the lifting mechanism;

[0005] The lifting mechanism comprises two support slides arranged in the wind turbine tower of the wind turbine generator set, the two support slides are arranged in parallel and along the axial direction of the wind turbine tower, and racks distributed along the length direction are respectively arranged on the outer side walls of the opposite surfaces of the two support slides; a support plate is arranged between the two support slides, and an engagement drive component is arranged on the support plate for engaging with the corresponding side rack to drive the support plate to slide and lift along the support slide;

[0006] The meshing drive assembly includes a driving member, a driven member and a transmission shaft. The driving member includes a motor and a driving bevel gear and a gear 1 installed on the motor output shaft; the driven member includes a linkage shaft and a driven bevel gear and a gear 2 arranged on the linkage shaft; the gear 1 and the gear 2 are respectively used to mesh with the corresponding side racks, and transmission bevel gears for meshing with the corresponding side driving bevel gear and the driven bevel gear are respectively arranged at both ends of the transmission shaft;

[0007] The powder discharge fire extinguishing mechanism includes a powder barrel arranged on a support plate, a top cover is installed on the top of the powder barrel, and a powder discharge hood is connected above the top cover to discharge the fire extinguishing dry powder in the powder barrel to the surrounding area for fire extinguishing; a powder conveying pipe is arranged between the powder barrel and the powder discharge hood and passes through the top cover to convey the fire extinguishing dry powder in the powder barrel to the powder discharge hood for discharge; an air intake pipe is arranged at the bottom of the support plate, the upper end of the air intake pipe passes through the support plate and is connected with the powder barrel, and the lower end of the air intake pipe is connected to the gas tank through an electromagnetic valve.

[0008] As an optimization solution for the above-mentioned lifting fire extinguishing device in the wind turbine generator set: the powder discharge hood includes an upper baffle cover and a lower baffle cover. The upper end of the powder conveying pipe passes through the lower baffle cover and a connecting plate is screwed on its end. A connecting column for connecting the lower baffle cover to the upper baffle cover is provided in the middle of the connecting plate. A powder discharge gap is formed between the lower baffle cover and the upper baffle cover through the connecting column. The connecting plate is provided with a plurality of through holes distributed around the connecting column for connecting the powder conveying pipe and the powder discharge gap.

[0009] As another optimization scheme of the lifting fire extinguishing device in the above-mentioned wind turbine generator set: a connecting pipe for installing the powder conveying pipe is arranged on the top cover, and the upper and lower edges of the connecting pipe are flush with the upper and lower ends of the powder conveying pipe respectively.

[0010] As another optimization scheme of the lifting fire extinguishing device in the above-mentioned wind turbine generator set: a side surface where the top cover covers the top of the powder cylinder is provided with a soft ring for sealing the covering.

[0011] As another optimization scheme for the lifting fire extinguishing device in the above-mentioned wind turbine generator set: sliding sleeves are respectively connected to the two sides of the support plate, and the two sliding sleeves are respectively slidably mounted on the supporting slides, and openings are opened in the middle of the sliding sleeves for gear one and gear two to pass through and engage with the corresponding side racks.

[0012] As another optimization scheme for the lifting fire extinguishing device in the above-mentioned wind turbine generator set: a first drive box for installing the active part and a second drive box for installing the driven part are arranged on the support plate, and mounting holes for the two ends of the transmission shaft to pass through are respectively arranged on the first drive box and the second drive box, and bearings for the rotation of the transmission shaft are arranged in the mounting holes.

[0013] As another optimization solution of the lifting fire extinguishing device in the above-mentioned wind turbine generator set: a plurality of fixing frames for connecting and fixing the two supporting slides are arranged between the two supporting slides along their length direction.

[0014] As another optimization solution of the lifting fire extinguishing device in the above-mentioned wind turbine generator set: the upper ends of the two supporting slides are connected with a supporting cross bar, and the supporting cross bar is fixed to the top of the wind turbine tower.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The lifting mechanism in the utility model is arranged in a wind power tower. Two parallel support slides in the lifting mechanism are arranged along the axial direction of the wind power tower. Racks distributed along their corresponding lengths are arranged on the outer side walls of the opposite surfaces of the two support slides. A support plate is arranged between the two support slides. A meshing drive assembly that can mesh with the racks on the support slide is arranged on the support plate. The meshing drive assembly drives the support plate to quickly rise or fall in the wind power tower by meshing with the racks. The gear 1 arranged on the motor output shaft and the gear 2 arranged on the linkage shaft in the meshing assembly can respectively mesh with the racks on the corresponding side support slides. The driving bevel gear arranged on the motor output shaft and the driven bevel gear arranged on the linkage shaft are respectively meshed with the transmission bevel gear arranged at the end of the transmission shaft between them to realize transmission, so that the support plate can move along the length of the support slide to realize synchronous lifting and lowering as the gears 1 and 2 on both sides mesh with the corresponding side racks. A powder discharge fire extinguishing mechanism is installed on the support plate for fire extinguishing. The powder discharge fire extinguishing mechanism includes a powder barrel, a powder delivery pipe, a powder discharge hood, an air intake pipe, and a gas tank. The powder barrel is arranged on the upper side of the support plate, and the air intake pipe is arranged on the lower side of the support plate. The lower end of the air intake pipe is connected to the gas tank through a solenoid valve, and the upper end of the air intake pipe passes through the support plate and is connected to the powder barrel. The powder barrel is filled with ultrafine dry powder, and a top cover is arranged on the top of the powder barrel. The lower end of the powder delivery pipe passes through the top cover and is located directly above the air intake pipe, so that the compressed gas in the gas tank can quickly rise to the ultrafine dry powder in the powder barrel through the air intake pipe to mix, and the compressed gas will carry the ultrafine dry powder and quickly pass through the upper discharge of the powder delivery pipe and then be discharged through the powder discharge hood to achieve fire extinguishing. When a fire occurs and needs to be extinguished, the lifting mechanism can drive the powder exhausting fire extinguishing mechanism to quickly rise to the fire point to discharge powder and achieve rapid fire extinguishing. This avoids the problem of manually carrying a fire extinguisher up a ladder and being inconvenient to operate the fire extinguisher for fire extinguishing. This reduces the danger of workers carrying a fire extinguisher up a ladder and operating a fire extinguisher on a ladder, thereby improving work safety.

[0017] 2. In the utility model, the upper end of the powder conveying pipe passes through the lower baffle on the powder discharge cover and is then screwed to the connecting piece, and a connecting column is provided on the connecting piece for connecting the upper baffle on the powder discharge cover, so that a powder discharge gap is formed between the upper baffle and the lower baffle. A plurality of through holes distributed in an annular manner and connected to the powder conveying pipe are provided on the connecting piece, so that the ultrafine dry powder in the powder conveying pipe enters the powder discharge gap through the through holes, and is sprayed around the powder discharge cover to extinguish the fire under the annular gas flow, thereby improving the fire extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a structural schematic diagram of the utility model lifting fire extinguishing device installed in a wind power tower;

[0019] Figure 2 This is a top view of the structure of the lifting fire extinguishing device installed in the wind power tower;

[0020] Figure 3 This is a structural schematic diagram of the powder discharge fire extinguishing mechanism installed on the support plate;

[0021] Figure 4 It is a structural schematic diagram of the powder exhaust fire extinguishing mechanism;

[0022] Figure 5 It is a structural schematic diagram of the connection between the powder exhaust hood and the air intake pipe.

[0023] Figure numerals: 1, wind turbine tower, 2, lifting mechanism, 201, fixed frame, 202, supporting slide, 203, supporting cross bar, 3, powder discharge fire extinguishing mechanism, 301, powder discharge cover, 3011, lower baffle cover, 3012, upper baffle cover, 3013, powder discharge gap, 302, powder conveying pipe, 303, top cover, 3031, soft ring, 3032, connecting pipe, 304, powder cylinder, 305, support plate, 306, air inlet pipe, 307, electric Magnetic valve, 308, gas tank, 309, connecting plate, 3091, through hole, 310, connecting column, 4, meshing drive assembly, 4a, active member, 4b, transmission shaft, 4c, driven member, 401, first drive box, 402, motor, 403, active bevel gear, 404, gear one, 405, sliding sleeve, 406, transmission bevel gear, 407, second drive box, 408, driven bevel gear, 409, linkage shaft, 410, gear two. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further elaborated in detail below in conjunction with specific embodiments. Parts not described in detail in the following embodiments of the present invention, such as gear one and the active bevel gear rotate under the drive of the motor and drive the driven bevel gear and gear two to rotate synchronously through the transmission shaft so that gear one and gear two are respectively engaged with the corresponding side racks to achieve ascent or descent, and the gas tank is controlled by the solenoid valve to open and release compressed gas or close the gas tank, etc., should be immediately known to those skilled in the art or should be known to the prior art.

[0025] like Figure 1-5 As shown, a lifting fire extinguishing device in a wind turbine generator set includes a lifting mechanism 2 arranged in a wind turbine tower 1 of the wind turbine generator set and a powder exhausting fire extinguishing mechanism 3 arranged on the lifting mechanism 2. The lifting mechanism 2 can rise or fall along the axial direction of the wind turbine tower 1 and drive the powder exhausting fire extinguishing mechanism 3 to rise or fall to the fire point for fire extinguishing.

[0026] The lifting mechanism 2 includes two supporting slides 202, a supporting plate 305 and an engaging drive assembly 4. The two supporting slides 202 are arranged side by side in the middle of the wind turbine tower 1 and along the axial direction of the wind turbine tower 1. A plurality of fixing frames 201 for fixing the two supporting slides 202 are arranged between the two supporting slides 202. The plurality of fixing frames 201 are evenly spaced along the length direction of the supporting slides 202, and the plurality of fixing frames 201 are arranged on the same side of the two supporting slides 202.

[0027] The shape of the fixing frame 201 is a U-shape. The support rods on both sides of the open end of the U-shaped fixing frame 201 are bent 90° toward the corresponding side support slide 202 and then welded and fixed to the outer wall of the corresponding side support slide 202, thereby realizing a fixed connection between the two support slides 202.

[0028] The lower ends of the two support slides 202 are fixed to the bottom of the wind turbine tower 1, and the upper ends of the two support slides 202 are fixedly connected to a support cross bar 203. The support cross bar 203 is arranged on the top of the wind turbine tower 1 and distributed along the radial direction of the wind turbine tower 1. The two ends of the support cross bar 203 are bent 90° respectively to form fixed flanges, and the support cross bar 203 is fixed by bolts inserted between its fixed flange and the side wall of the wind turbine tower 1.

[0029] Racks distributed along the length direction are respectively arranged on the outer side walls of the opposite surfaces of the two support slides 202. The support plate 305 is arranged between the two support slides 202. A sliding sleeve 405 is respectively fixed on the two side edges of the support plate 305 close to the support slide 202. The two sliding sleeves 405 are respectively hooped on the corresponding side support slides 202, and the support plate 305 slides on the support slide 202 through the sliding sleeves 405.

[0030] The meshing drive assembly 4 is arranged on the support plate 305, and the meshing drive assembly 4 can mesh with the corresponding side rack to drive the support plate 305 to slide and rise and fall along the support slide 202. The meshing drive assembly 4 includes a first drive box 401 and a second drive box 407 arranged on the support plate 305, and an active member 4a arranged in the first drive box 401 and a driven member 4c arranged in the second drive box 407, and the active member 4a and the driven member 4c are connected to each other through a transmission shaft 4b.

[0031] like Figure 3 As shown, the first drive box 401 is fixed to the support plate 305 by bolts and is located near the left support slide 202, and the second drive box 407 is fixed to the support plate 305 by bolts and is located near the right support slide 202. The active member 4a includes a motor 402 disposed in the first drive box 401, and the motor 402 is a stepper motor 402, which is fixed in the first drive box 401 by bolts penetrating its base and the first drive box 401.

[0032] The output shaft of the motor 402 is connected to a rotating shaft through a coupling, and a bearing is provided on the side wall of the first driving box 401 for the end of the rotating shaft away from the motor 402 to pass through and rotate. The rotating shaft is sequentially connected with a driving bevel gear 403 and a gear 1 404 by interference keys from the inside to the outside, and an opening is provided in the middle of a sliding sleeve 405 near the side of the gear 1 404, and the gear 1 404 can pass through the opening on the corresponding side sliding sleeve 405 and mesh with the corresponding side rack.

[0033] The driven member 4c includes a linkage shaft 409, and a bearing for the linkage shaft 409 to pass through and rotate is arranged on the side wall of the second driving box 407. The linkage shaft 409 is sequentially connected with a driven helical gear 408 and a second gear 410 by interference keys, and an opening is also opened in the middle of the sliding sleeve 405 near the second gear 410, and the second gear 410 can pass through the opening on the corresponding side sliding sleeve 405 and mesh with the corresponding side rack.

[0034] The first drive box 401 and the second drive box 407 are provided with mounting holes for the transmission shaft 4b to pass through on one side wall that is opposite to each other. The mounting holes are provided with bearings for the transmission shaft 4b to rotate. Transmission bevel gears 406 are installed at both ends of the transmission shaft 4b after passing through the holes. The transmission bevel gear 406 at the left end of the transmission shaft 4b can mesh with the driving bevel gear 403, and the transmission bevel gear 406 at the right end of the transmission shaft 4b can mesh with the driven bevel gear 408.

[0035] Driven by the motor 402, the gear 1 404 can mesh with the corresponding side rack to drive the support plate 305 to rise and fall. At the same time, the active bevel gear 403 can drive the transmission shaft 4b to rotate through the transmission bevel gear 406 meshed with it. The transmission bevel gear 406 at the other end of the transmission shaft 4b rotates synchronously and drives the driven bevel gear 408 meshed with it to rotate. Then, the gear 2 410 meshed with the opposite rack can rotate with the rotating driven bevel gear 408 to achieve synchronous lifting and lowering, so that the support plate 305 can be stably lifted and lowered as the gear 1 404 and the gear 2 410 are respectively meshed with the corresponding racks.

[0036] like Figure 4As shown, the powder discharge fire extinguishing mechanism 3 includes a powder barrel 304, a top cover 303, a powder discharge cover 301, and a powder conveying pipe 302 arranged on the upper side of the support plate 305, and an air inlet pipe 306 and an air tank 308 arranged on the lower side of the support plate 305. The upper end of the air inlet pipe 306 passes through the support plate 305 and is connected to the powder barrel 304. The lower end of the air inlet pipe 306 is connected to the air tank 308, and a solenoid valve 307 for controlling the opening and closing of the air tank 308 is arranged between the air inlet pipe 306 and the air tank 308. A through hole for the air inlet pipe 306 to pass through is provided on the lower side of the support plate 305 at the position where the upper end of the air inlet pipe 306 passes through the support plate 305. A fixing ring connected to the through hole is fixed on the lower side of the support plate 305 at the position of the through hole. The fixing ring is hooped on the air inlet pipe 306, and the air inlet pipe 306 is fixed to the support plate 305 through the fixing ring.

[0037] The powder barrel 304 is a cylinder with openings at both the upper and lower ends. The powder barrel 304 contains ultrafine dry powder, which is ammonium phosphate ultrafine dry powder. The lower end of the powder barrel 304 is fixed to the upper end surface of the support plate 305, and the top cover 303 is screwed on the top of the powder barrel 304. The inner wall of the powder barrel 304 is provided with an internal thread near the top thereof for screwing with the top cover 303.

[0038] The top cover 303 is composed of a cover section and a screw connection section. The connection between the cover section and the screw connection section is provided with a circle of mounting grooves along its circumference. A soft ring 3031 is installed in the mounting groove. The outer diameter of the soft ring 3031 is equal to the outer diameter of the powder barrel 304. The setting of the soft ring 3031 can increase the sealing of the powder barrel 304 when the top cover 303 is covered on the powder barrel 304. A connecting pipe 3032 is provided perpendicular to the top cover 303 in the middle part. The connecting pipe 3032 runs through the top cover 303. The connecting pipe 3032 on the lower end surface of the top cover 303 is located in the powder barrel 304. The connecting pipe 3032 on the upper end surface of the top cover 303 is connected to the powder discharge cover 301.

[0039] The powder conveying pipe 302 is arranged in the connecting pipe 3032 and communicated with the powder barrel 304. The upper pipe opening of the powder conveying pipe 302 is flush with the upper end of the connecting pipe 3032, and the lower pipe opening of the powder conveying pipe 302 is flush with the lower end of the connecting pipe 3032. The upper pipe opening of the powder conveying pipe 302 is sealedly connected to the upper end of the connecting pipe 3032, and the lower pipe opening of the powder conveying pipe 302 is sealedly connected to the lower end of the connecting pipe 3032. Therefore, the inside of the connecting pipe 3032 is in a sealed state to prevent the ultrafine dry powder in the powder barrel 304 from entering the connecting pipe 3032.

[0040] The lower pipe opening of the powder conveying pipe 302 is located above the air inlet pipe 306, and there is a certain distance between the lower pipe opening of the powder conveying pipe 302 and the bottom of the powder barrel 304. In addition, the diameter of the powder conveying pipe 302 is smaller than the diameter of the air inlet pipe 306, so that the compressed gas mixed with the ultra-fine dry powder that enters the powder barrel 304 through the air inlet pipe 306 enters the powder conveying pipe 302 and is discharged from the powder exhaust hood 301.

[0041] like Figure 5 As shown, the powder discharge cover 301 includes an upper baffle cover 3012 and a lower baffle cover 3011, and a connecting pipe 3032 on the upper end surface of the top cover 303 penetrates the lower baffle cover 3011. A connecting piece 309 is screwed and installed at the upper pipe opening of the powder conveying pipe 302. The connecting piece 309 is circular and has a certain thickness, and the diameter of the connecting piece 309 is larger than the diameter of the upper pipe opening of the powder conveying pipe 302. A connecting column 310 is arranged in the middle of the connecting piece 309. The connecting column 310 and the connecting piece 309 are integrally formed. The lower end of the connecting column 310 is fixed on the connecting piece 309, and the upper end of the connecting column 310 is fixedly connected to the lower end surface of the upper baffle cover 3012.

[0042] The connecting column 310 is provided to connect the upper shield 3012 and the lower shield 3011. The distance between the upper shield 3012 and the lower shield 3011 is 3 mm. The distance between the upper shield 3012 and the lower shield 3011 forms a powder discharge gap 3013 for the discharge of the fire extinguishing dry powder. A plurality of through holes 3091 are provided on the connecting piece 309 around the connecting column 310. The through holes 3091 are connected to the powder delivery pipe 302 so that the ultra-fine dry powder in the powder delivery pipe 302 enters the powder discharge gap 3013 after passing through the through holes 3091. When the compressed gas passes through the annularly distributed through holes 3091, an annular airflow is formed. Under the movement of the annular gas, the ultra-fine dry powder can be effectively sprayed to the surroundings for fire extinguishing, thereby improving the fire extinguishing effect.

[0043] The specific implementation is as follows: when a fire occurs in the wind turbine tower 1, the motor 402 is started, and the output shaft of the motor 402 drives the rotating shaft to rotate, and the gear 1 404 meshes with the left rack and rotates. At the same time, the rotating active bevel gear 403 can drive the transmission bevel gear 406 meshed with it to rotate, and the synchronously rotating transmission shaft 4b drives the transmission bevel gear 406 at its right end to drive the driven bevel gear 408 to rotate, and the rotating driven bevel gear 408 drives the gear 2 410 meshed with the right rack to rotate through the linkage shaft 409, so that the support plate 305 moves up along the length direction of the support slide 202 and drives the powder discharge fire extinguishing mechanism 3 to move to the fire point. When the ignition point is reached, the electromagnetic valve 307 opens the gas tank 308, and the compressed gas in the gas tank 308 enters the powder tube 304 through the air inlet pipe 306 and mixes with the ultra-fine dry powder. The compressed gas carries the ultra-fine dry powder into the powder conveying pipe 302, enters the powder discharge gap 3013 through the through hole 3091, and then is sprayed around the powder discharge cover 301 to extinguish the fire. When the fire is extinguished, the electromagnetic valve 307 is powered off and the gas tank 308 is closed, and the motor 402 is started, and the output shaft of the motor 402 drives the rotating shaft to rotate in the opposite direction, and the powder discharge fire extinguishing mechanism 3 is lowered to the bottom of the wind power tower 1 along with the support plate 305.

Claims

1. A lifting fire extinguishing device in a wind turbine generator set, characterized in that: It comprises a lifting mechanism (2) and a powder discharge fire extinguishing mechanism (3) arranged on the lifting mechanism (2); The lifting mechanism (2) comprises two support slides (202) arranged in a wind turbine tower (1) of a wind turbine generator set, the two support slides (202) being arranged in parallel and arranged along the axial direction of the wind turbine tower (1), and racks arranged along the length direction of the two support slides (202) are respectively arranged on the outer side walls of the opposite surfaces of the two support slides (202); a support plate (305) is arranged between the two support slides (202), and the support plate (305) is provided with an engagement drive assembly (4) for engaging with a corresponding side rack to drive the support plate (305) to slide and lift along the support slide (202); The meshing drive assembly (4) comprises a driving member (4a), a driven member (4c) and a transmission shaft (4b); the driving member (4a) comprises a motor (402) and a driving bevel gear (403) and a gear 1 (404) mounted on the output shaft of the motor (402); the driven member (4c) comprises a linkage shaft (409) and a driven bevel gear (408) and a gear 2 (410) arranged on the linkage shaft (409); the gear 1 (404) and the gear 2 (410) are respectively used to mesh with the corresponding side racks, and transmission bevel gears (406) for meshing with the corresponding side driving bevel gear (403) and the driven bevel gear (408) are respectively arranged at both ends of the transmission shaft (4b); The powder discharge fire extinguishing mechanism (3) comprises a powder cartridge (304) arranged on a support plate (305), a top cover (303) being installed on the top of the powder cartridge (304), a powder discharge cover (301) being connected above the top cover (303) and being used for discharging the fire extinguishing dry powder in the powder cartridge (304) to the surrounding area for extinguishing the fire; a powder conveying pipe (302) penetrating the top cover (303) and being used for conveying the fire extinguishing dry powder in the powder cartridge (304) to the powder discharge cover (301) for discharge is arranged between the powder cartridge (304) and the powder discharge cover (301); an air intake pipe (306) is arranged at the bottom of the support plate (305), the upper end of the air intake pipe (306) penetrating the support plate (305) and being communicated with the powder cartridge (304), and the lower end of the air intake pipe (306) being connected to a gas tank (308) via a solenoid valve (307).

2. The lifting fire extinguishing device in a wind turbine generator set according to claim 1, characterized in that: The powder discharge cover (301) comprises an upper baffle cover (3012) and a lower baffle cover (3011). The upper end of the powder conveying pipe (302) passes through the lower baffle cover (3011), and a connecting piece (309) is screwed to the end of the upper baffle cover (3012). A connecting column (310) for connecting the lower baffle cover (3011) to the upper baffle cover (3012) is provided in the middle of the connecting piece (309). A powder discharge gap (3013) is formed between the lower baffle cover (3011) and the upper baffle cover (3012) through the connecting column (310). The connecting piece (309) is provided with a plurality of through holes (3091) distributed around the connecting column (310) for connecting the powder conveying pipe (302) and the powder discharge gap (3013).

3. The lifting fire extinguishing device in a wind turbine generator set according to claim 2, characterized in that: A connecting pipe (3032) for mounting the powder conveying pipe (302) is provided on the top cover (303), and the upper edge and the lower edge of the connecting pipe (3032) are respectively flush with the upper end and the lower end of the powder conveying pipe (302).

4. The lifting fire extinguishing device in a wind turbine generator set according to claim 1, characterized in that: A soft ring (3031) is provided on one side of the top cover (303) that covers the top of the powder cartridge (304) to provide sealing.

5. The lifting fire extinguishing device in a wind turbine generator set according to claim 1, characterized in that: The two sides of the support plate (305) are respectively connected with sliding sleeves (405), and the two sliding sleeves (405) are respectively slidably mounted on the support slide (202), and the middle of the sliding sleeves (405) is provided with openings for the gear 1 (404) and the gear 2 (410) to pass through and mesh with the corresponding side racks.

6. The lifting fire extinguishing device in a wind turbine generator set according to claim 1, characterized in that: A first drive box (401) for mounting the active member (4a) and a second drive box (407) for mounting the driven member (4c) are provided on the support plate (305); mounting holes for allowing two ends of the transmission shaft (4b) to pass through are provided on the first drive box (401) and the second drive box (407), respectively; and bearings for allowing the transmission shaft (4b) to rotate are provided in the mounting holes.

7. The lifting fire extinguishing device in a wind turbine generator set according to claim 1, characterized in that: A plurality of fixing frames (201) for connecting and fixing the two supporting slides (202) are arranged between the two supporting slides (202) along their length direction.

8. The lifting fire extinguishing device in a wind turbine generator set according to claim 1, characterized in that: The upper ends of the two support slides (202) are connected to a support cross bar (203), and the support cross bar (203) is fixed to the top of the wind power tower (1).

Images