Control cabinet applied to hydropower station and provided with dehumidification and dust removal device

Abstract

The control cabinet comprises a cabinet body (1), a first ventilation opening (11) is formed in the top of the cabinet body (1), a second ventilation opening (12) is formed in the side portion of the cabinet body (1), a dust collection opening (13) is formed in the bottom of the cabinet body (1), a draught fan (2), a pulse air pipe (3) and a dust collector (4) are arranged outside the cabinet body (1), and a filter cover is arranged at the air inlet end of the draught fan (2). The air outlet end of the fan (2) is communicated with the interior of the cabinet body (1) through a first ventilation opening (11), the air outlet end of the pulse air pipe (3) is communicated with the interior of the cabinet body (1) through a second ventilation opening (12), the air outlet ends of the fan (2) and the pulse air pipe (3) are provided with heaters, and the dust collection end of the dust collector (4) is communicated with the interior of the cabinet body (1) through a dust collection opening (13). The device has the characteristics of automatic drying and comprehensive dust removal.

Description

Technical Field

[0001] The invention relates to a control cabinet, in particular to a control cabinet with a dehumidification and dust removal device used in a hydropower station. Background Art

[0002] At present, pumped storage power stations are developing rapidly. Due to the special working environment of hydropower stations, the frequent start and stop of generator sets and the high vibration and noise of turbines lead to a lot of dust in the generator plant. In addition, the units of hydropower stations are generally located in underground plants in the mountains, with high air humidity. Dust accumulates inside and on the surface of the equipment, which can easily reduce the insulation strength and cause discharge, especially when in a humid environment or under micro-condensation conditions, the presence of water vapor will cause the equipment to short-circuit. In order to overcome this problem, the units currently use manual regular maintenance and dust cleaning methods. The operation and maintenance personnel are required to isolate the loads borne by the control cabinet, and after the control cabinet is powered off, the staff will disassemble and clean the dust. After all the cleaning is completed, the operation and maintenance personnel are required to return the electrical equipment or terminal blocks to their original positions. During this operation, it is very easy to damage the electrical equipment due to improper operation, and the screws loosen during the installation of the terminal block, which makes the operation very inconvenient and has a great impact on the progress of the operation and the work efficiency of the staff.

[0003] At present, some products' control cabinets have dust collection function, but due to the humid environment and the loose sealing of the control cabinet, the dust collection effect is poor, which is more likely to cause equipment short circuit and partial discharge. Summary of the invention

[0004] The purpose of the present invention is to provide a control cabinet with a dehumidification and dust removal device for use in a hydropower station. The present invention has the characteristics of automatic drying and comprehensive dust removal.

[0005] The technical solution of the present invention is a control cabinet with a dehumidification and dust removal device applied to a hydropower station, comprising a cabinet body, a first ventilating port on the top of the cabinet body, a second ventilating port on the side of the cabinet body, a dust suction port on the bottom of the cabinet body, a fan, a pulse air pipe and a dust collector on the outside of the cabinet body, a filter cover on the air inlet end of the fan, the air outlet end of the fan is connected with the interior of the cabinet body through the first ventilating port, the air outlet end of the pulse air pipe is connected with the interior of the cabinet body through the second ventilating port, heaters are provided on the air outlet ends of the fan and the pulse air pipe, and the dust suction end of the vacuum cleaner is connected with the interior of the cabinet body through the dust suction port.

[0006] In the aforementioned control cabinet with a dehumidification and dust removal device used in a hydropower station, the outer top and outer side of the cabinet are respectively provided with screws distributed vertically to each other, and the two screws are mutually transmitted through the meshing of a bevel gear set. One of the screws is provided with a driving motor, and the fan and the pulse air pipe are provided with a threaded sleeve connected to the screw thread. The outside of the cabinet is also provided with a sliding rod for limiting the movement of the fan and the pulse air pipe.

[0007] In the aforementioned control cabinet with a dehumidification and dust removal device used in a hydropower station, a sealing slide belt is provided inside the cabinet body to cover the first vent and the second vent, and a first air inlet and a second air inlet are provided on the sealing slide belt. The air outlet end of the fan passes through the first vent and is fixedly connected to the sealing slide belt via the first air inlet, and the air outlet end of the pulse air pipe passes through the second vent and is fixedly connected to the sealing slide belt via the second air inlet.

[0008] In the aforementioned control cabinet with a dehumidification and dust removal device used in a hydropower station, two diagonally distributed rollers are rotatably connected to the inside of the cabinet via a rotating shaft, and the two ends of the sealing sliding belt are respectively wound on the two rollers, one of which is driven by a sliding belt motor, and a first torsion spring is sleeved on the rotating shaft of the other roller, one end of the first torsion spring is connected to the cabinet, and the other end of the first torsion spring is connected to the rotating shaft, and a guide wheel is also provided inside the cabinet between the two rollers.

[0009] In the aforementioned control cabinet with a dehumidification and dust removal device used in a hydropower station, the inner sides of the first and second vents are located on both side edges of the sealing sliding belt and are respectively provided with limit plates, and the limit plates are provided with limit grooves for the edges of the sealing sliding belt to pass through.

[0010] In the aforementioned control cabinet with a dehumidification and dust removal device used in a hydropower station, a fixed seat is provided on the side of the limit groove close to the inside of the cabinet, a mounting groove is provided in the fixed seat, a roller seat is connected in the mounting groove through a compression spring, and a pressure wheel is provided on the roller seat for pressing the sealing sliding belt toward the outside of the cabinet.

[0011] In the aforementioned control cabinet with dehumidification and dust removal device used in hydropower stations, the outlet end of the pulse air pipe is provided with a main pipe extending into the interior of the cabinet, the main pipe is provided with a plurality of branch pipes, and the branch pipes are provided with a plurality of telescopic branches extending between adjacent electrical components.

[0012] The aforementioned control cabinet with a dehumidification and dust removal device applied to a hydropower station, the telescopic branch pipe includes an outer pipe rotatably connected to the branch pipe, the inner pipe is connected to the inner pipe by internal threads of the outer pipe, the outside of the outer pipe is fixedly connected to a transmission gear, the transmission gears on adjacent outer pipes are connected by a synchronous belt, one of the transmission gears is connected to a driving gear via a synchronous belt, and the driving gear is installed on the output shaft of the driving motor.

[0013] In the aforementioned control cabinet with a dehumidification and dust removal device applied to a hydropower station, the end of the telescopic branch pipe is rotatably connected to an air outlet seat, a side of the air outlet seat is provided with an air outlet head inclined upwardly distributed, a guide driving plate is provided on the air outlet seat above the air outlet head, a rotating shaft rotatably connected to the air outlet seat is provided in the middle of the guide driving plate, a second torsion spring is sleeved on the rotating shaft, one end of the second torsion spring is connected to the air outlet seat, and the other end of the second torsion spring is connected to the guide driving plate, one end of the guide driving plate is provided with a first guide part and a second guide part that are centrally symmetrical and arc-shaped, the first guide part and the second guide part are provided with a guide groove corresponding to the air outlet direction of the air outlet head on the opposite sides, an air outlet hole is provided between the first guide part and the second guide part, an impact active block is provided at the other end of the guide driving plate, and an impact passive block that collides with the impact active block is provided on the air outlet seat; in the non-air-out state, the second guide part abuts against the air outlet seat under the connection of the second torsion spring to close the air outlet head; in the air-out state, the gas impacts the second guide part, so that the second guide part and the air outlet seat are separated to release gas.

[0014] In the aforementioned control cabinet with a dehumidification and dust removal device used in a hydropower station, a blocking needle is provided on the side of the air outlet seat close to the air outlet head, and the blocking needle is transversely threaded through the air outlet seat, and the needle head of the blocking needle corresponds to the air outlet direction of the air outlet head; a sliding plate is provided on the top of the air outlet seat, a connecting hole is provided on the sliding plate, and a long groove corresponding to the connecting hole is provided on the air outlet seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention sets a filter cover at the inlet end of the fan to prevent external dust from entering the cabinet body, and the air outlet end of the fan performs a large-scale dust blowing treatment on the internal electrical components of the control cabinet; the inlet end of the pulse air pipe is provided with a pulse solenoid valve and a pulse air bag, and a pulse airflow is introduced into the pulse air pipe to perform targeted dust blowing treatment on the electrical components in the control cabinet. When the fan and the pulse air pipe are started, the exhausted air will be heated by the heater first, so as to send out dry and clean hot air to dry the moisture in the control cabinet. While the fan and the pulse air pipe are blowing and drying, the dust collector is set to vacuum synchronously, which ensures that the internal space of the control cabinet is dry while preventing local discharge caused by dust floating, and the dust suction and dehumidification effect is better. It also ensures that the internal air pressure of the control cabinet is balanced with the external air pressure to avoid excessive internal and external pressure difference from damaging the cabinet door. The fan, the pulse air pipe and the dust collector are combined with each other to perform a thorough and comprehensive dust cleaning, dust removal and dehumidification treatment on the interior of the control cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the limiting plate.

[0019] Figure 3 yes Figure 2 A magnified view of the local structure at point A.

[0020] Figure 4 It is a structural schematic diagram of the telescopic branch pipe.

[0021] Figure 5 It is a structural diagram of the air outlet seat.

[0022] Figure 6 It is a structural schematic diagram of the guide drive plate.

[0023] Figure 7 It is a collision diagram of hitting active blocks and hitting passive blocks.

[0024] Figure 8 It is a schematic diagram of the structure of the blocking needle.

[0025] The markings in the attached drawings are: 1, cabinet; 11, first vent; 12, second vent; 13, dust suction port; 14, screw; 15, bevel gear set; 16, drive motor; 17, threaded sleeve; 18, slide rod; 2, fan; 3, pulse air pipe; 31, main pipe; 32, branch pipe; 33, telescopic branch pipe; 331, outer pipe; 332, inner pipe; 333, transmission gear; 334, synchronous belt; 335, driving gear; 336, driving motor; 4, vacuum cleaner; 5, sealing slide Belt; 51, roller; 52, guide wheel; 53, limit plate; 54, limit groove; 55, fixed seat; 56, mounting groove; 57, compression spring; 58, roller seat; 59, pressure wheel; 6, air outlet seat; 61, air outlet head; 62, guide drive plate; 63, rotating shaft; 64, second torsion spring; 651, first guide part; 652, second guide part; 653, guide groove; 654, air outlet; 66, impact active block; 67, impact passive block; 68, blocking needle; 69, sliding plate. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments, but they are not intended to limit the present invention.

[0027] Example:

[0028] like Figure 1-Figure 8As shown, a control cabinet with a dehumidification and dust removal device used in a hydropower station includes a cabinet 1, a first vent 11 is provided on the top of the cabinet 1, a second vent 12 is provided on the side of the cabinet 1, a dust suction port 13 is provided on the bottom of the cabinet 1, a fan 2, a pulse air pipe 3 and a dust collector 4 are provided on the outside of the cabinet 1, a filter cover is provided at the air inlet end of the fan 2, an air outlet end of the fan 2 is connected with the interior of the cabinet 1 through the first vent 11, an air outlet end of the pulse air pipe 3 is connected with the interior of the cabinet 1 through the second vent 12, heaters are provided at the air outlet ends of the fan 2 and the pulse air pipe 3, and a dust suction end of the dust collector 4 is connected with the interior of the cabinet 1 through the dust suction port 13.

[0029] The present invention sets a filter cover at the inlet end of the fan 2 to prevent external dust from entering the cabinet 1, and the air outlet end of the fan 2 performs a large-scale dust blowing treatment on the internal electrical components of the control cabinet; the inlet end of the pulse air pipe 3 is provided with a pulse solenoid valve and a pulse air bag, and a pulse airflow is introduced into the pulse air pipe 3 to perform targeted dust blowing treatment on the electrical components in the control cabinet. When the fan 2 and the pulse air pipe 3 are started, the exhausted wind will be heated by the heater first, so as to send out dry and clean hot air to dry the moisture in the control cabinet. While the fan 2 and the pulse air pipe 3 are blowing and drying, the dust collector 4 is set to dust synchronously, which ensures that the internal space of the control cabinet is dry, prevents partial discharge caused by dust floating, and has better dust collection and dehumidification effects. It also ensures that the internal air pressure of the control cabinet is balanced with the external air pressure, and avoids the damage of the cabinet door due to excessive internal and external pressure difference. The fan 2, the pulse air pipe 3 and the dust collector 4 are combined with each other to perform thorough and comprehensive dust cleaning, dust removal and dehumidification treatment on the interior of the control cabinet.

[0030] The outer top and outer side of the cabinet 1 are respectively provided with screws 14 distributed vertically to each other, and the two screws 14 are mutually transmitted through the meshing of a bevel gear set 15. A driving motor 16 is provided on one of the screws 14, and a threaded sleeve 17 threadedly connected to the screw 14 is provided on the fan 2 and the pulse air pipe 3. A sliding rod 18 for limiting the movement of the fan 2 and the pulse air pipe 3 is also provided on the outside of the cabinet 1.

[0031] The two screws 14 are driven to rotate by the drive motor 16 and the bevel gear set 15, thereby driving the fan 2 and the pulse air pipe 3 to move back and forth in the horizontal and vertical directions, realizing mobile blowing and drying, ensuring uniform air discharge in all aspects, making the air in the control cabinet dry, ensuring that dust is floating and loose, and preventing the internal part of the control cabinet from being heated or the components in the control cabinet from being damaged due to excessive wind force. The hot air discharged by the drive motor 16 can also be introduced into the air inlet end of the fan 2 for heat recovery.

[0032] The cabinet 1 is provided with a sealing belt 5 for shielding the first vent 11 and the second vent 12 inside, and the sealing belt 5 is provided with a first air inlet and a second air inlet. The air outlet of the fan 2 passes through the first vent 11 and is fixedly connected to the sealing belt 5 via the first air inlet, and the air outlet of the pulse air pipe 3 passes through the second vent 12 and is fixedly connected to the sealing belt 5 via the second air inlet. The sealing belt 5 shields the first vent 11 and the second vent 12, and the fan 2 and the pulse air pipe 3 move to drive the sealing belt 5 to move synchronously, thereby improving the sealing performance of the cabinet 1.

[0033] The cabinet 1 is internally connected with two diagonally distributed rollers 51 through a rotating shaft, and the two ends of the sealing belt 5 are respectively wound on the two rollers 51, one of the rollers 51 is driven by a belt motor, and the other roller 51 is sleeved with a first torsion spring on its rotating shaft, one end of the first torsion spring is connected to the cabinet 1, and the other end of the first torsion spring is connected to the rotating shaft, and a guide wheel 52 is also provided between the two rollers 51 inside the cabinet 1. The two rollers 51 are arranged to wind the sealing belt 5, so that when the sealing belt 5 moves, the rollers 51 automatically release the sealing belt 5 or reel in the sealing belt 5, thereby facilitating the stable movement of the sealing belt 5, and maintaining a certain tension of the sealing belt 5, ensuring its flatness, reducing wrinkles, and cooperating with the guide wheel 52 to improve the smoothness of the movement of the sealing belt 5 and the shielding and sealing performance of the first vent 11 and the second vent 12.

[0034] The inner sides of the first vent 11 and the second vent 12 are respectively provided with limiting plates 53 at the two side edges of the sealing slide belt 5, and the limiting plates 53 are provided with limiting grooves 54 for the edges of the sealing slide belt 5 to pass through. The limiting plates 53 are provided to support and limit the sealing slide belt 5 through the limiting grooves 54, so as to ensure the moving stability of the sealing slide belt 5 and prevent the sealing slide belt 5 from sagging, deflecting, falling, etc. during the moving process, thereby affecting the shielding and sealing performance of the first vent 11 and the second vent 12.

[0035] A fixing seat 55 is provided on one side of the limiting groove 54 close to the inside of the cabinet 1, and a mounting groove 56 is provided in the fixing seat 55. A roller seat 58 is connected to the mounting groove 56 through a compression spring 57, and a pressing wheel 59 is provided on the roller seat 58 for pressing the sealing belt 5 toward the outside of the cabinet 1. The provided pressing wheel 59 presses the sealing belt 5 under the drive of the compression spring 57, reduces the gap between the sealing belt 5 and the first ventilation port 11 and the second ventilation port 12, improves the sealing performance of the control cabinet, and reduces the amount of moisture and dust entering from the outside.

[0036] The gas outlet end of the pulse gas pipe 3 is provided with a main pipe 31 extending into the cabinet 1, and the main pipe 31 is provided with a plurality of branch pipes 32, and the branch pipes 32 are provided with a plurality of telescopic branches 33 extending between adjacent electrical components. Through the branch pipes 32 and the telescopic branches 33, each adjacent electrical component can be extended to perform targeted deep cleaning and dust removal at some dead corners, slits, recesses and other locations.

[0037] The telescopic branch pipe 33 includes an outer pipe 331 rotatably connected to the branch pipe 32, the inner pipe 332 is connected to the inner pipe 331 through a thread, the outer pipe 331 is fixedly connected to the outer part of the outer pipe 331, and the transmission gears 333 on adjacent outer pipes 331 are connected through a synchronous belt 334, and a driving gear 335 is connected to one of the transmission gears 333 through the synchronous belt 334, and the driving gear 335 is installed on the output shaft of the driving motor 336. A limit rod is also provided on the outer pipe 331 to limit the movement of the inner pipe 332 without rotating. Through the coordinated connection of the driving motor 336, the driving gear 335, the synchronous belt 334 and the transmission gear 333, the outer pipe 331 is driven to rotate, thereby driving the inner pipe 332 threadedly connected to the outer pipe 331 to telescopically move, adjusting the gas outlet position of the inner pipe 332, and expanding the gas outlet range.

[0038] The end of the telescopic branch pipe 33 is rotatably connected to the air outlet seat 6, and an air outlet head 61 which is inclined upward is provided on one side of the air outlet seat 6. A guide driving plate 62 is provided on the air outlet seat 6 above the air outlet head 61. A rotating shaft 63 rotatably connected to the air outlet seat 6 is provided in the middle of the guide driving plate 62. A second torsion spring 64 is sleeved on the rotating shaft 63. One end of the second torsion spring 64 is connected to the air outlet seat 6, and the other end of the second torsion spring 64 is connected to the guide driving plate 62. One end of the guide driving plate 62 is provided with a first guide portion 651 and a second guide portion 652 which are centrally symmetrical and arc-shaped. The first guide portion 651 and the second guide portion 652 are provided with a guide groove 653 corresponding to the air outlet direction of the air outlet head 61 on the opposite sides. An air outlet hole 654 is provided between the first guide portion 651 and the second guide portion 652. An impact active block 66 is provided at the other end of the guide driving plate 62. An impact passive block 67 which collides with the impact active block 66 is provided on the air outlet seat 6. When the outlet head 61 is not in the air discharge state, the first guide part 651 is connected with the outlet seat 6 under the connection of the second torsion spring 64 to close the outlet head 61, so as to prevent the dust in the control cabinet from blocking the outlet head 61; in the air discharge state, the gas passes through the first guide part 651 and the outlet hole 654, and impacts the second guide part 652, overcoming the torsional elastic force of the second torsion spring 64, so that the first guide part 651 is separated from the outlet seat 6 to discharge gas, and the guide driving plate 62 rotates, driving the impact active block 66 to impact the impact passive block 67, so that the outlet seat 6 rotates under the impact force of the guide driving plate 62. After the pulsed air discharge is performed in sequence in the above manner, the guide driving plate 62 hits the outlet seat 6 one by one to rotate and adjust the air discharge direction, so as to realize the rotary air discharge and expand the air discharge range.

[0039] The side of the outlet seat 6 near the outlet head 61 is provided with an outlet groove distributed according to the outlet direction, and a blocking needle 68 is threaded through the outlet groove, and the needle head of the blocking needle 68 corresponds to the outlet direction of the outlet head 61; the top of the outlet seat 6 is provided with a sliding plate 69, and a connecting hole is provided on the sliding plate 69, and a long groove corresponding to the connecting hole is provided on the outlet seat 6. After the pulse gas is discharged from the outlet head 61, the pulse gas can be blocked by adjusting the extended position of the blocking needle 68, so that the pulse gas changes between concentrated spraying and dispersed spraying. The sliding plate 69 is located in the spraying direction of the pulse gas to limit the spraying height of the pulse gas. By adjusting the relative position of the sliding plate 69 to the fixed seat, the spraying height and distance of the pulse gas are adjusted, thereby changing the spraying position, and some narrow gaps can be targeted to improve the cleaning effect of dust attached to the dead corner position in the control cabinet.

Claims

1. Applied to the control cabinet with dehumidification and dust removal device in hydropower station, characterized by: The cabinet (1) comprises a cabinet body (1), wherein a first ventilation opening (11) is provided at the top of the cabinet body (1), a second ventilation opening (12) is provided at the side of the cabinet body (1), a dust suction opening (13) is provided at the bottom of the cabinet body (1), a fan (2), a pulse air pipe (3) and a dust collector (4) are provided outside the cabinet body (1), a filter cover is provided at the air inlet end of the fan (2), an air outlet end of the fan (2) is connected to the interior of the cabinet body (1) via the first ventilation opening (11), an air outlet end of the pulse air pipe (3) is connected to the interior of the cabinet body (1) via the second ventilation opening (12), a heater is provided at the air outlet ends of the fan (2) and the pulse air pipe (3), and a dust suction end of the dust collector (4) is connected to the interior of the cabinet body (1) via the dust suction opening (13).

2. The control cabinet with a dehumidification and dust removal device used in a hydropower station according to claim 1, characterized in that: The outer top and outer side of the cabinet (1) are respectively provided with screws (14) which are vertically distributed to each other. The two screws (14) are mutually driven by meshing with a bevel gear set (15). A driving motor (16) is provided on one of the screws (14). The fan (2) and the pulse air pipe (3) are provided with a threaded sleeve (17) which is threadedly connected to the screw (14). The outside of the cabinet (1) is also provided with a sliding rod (18) for limiting the movement of the fan (2) and the pulse air pipe (3).

3. The control cabinet with a dehumidification and dust removal device used in a hydropower station according to claim 1, characterized in that: The cabinet (1) is provided with a sealing sliding belt (5) inside for covering the first ventilation opening (11) and the second ventilation opening (12); the sealing sliding belt (5) is provided with a first air inlet and a second air inlet; the air outlet end of the fan (2) passes through the first ventilation opening (11) and is fixedly connected to the sealing sliding belt (5) via the first air inlet; the air outlet end of the pulse air pipe (3) passes through the second ventilation opening (12) and is fixedly connected to the sealing sliding belt (5) via the second air inlet.

4. The control cabinet with a dehumidification and dust removal device used in a hydropower station according to claim 3, characterized in that: The cabinet (1) is internally connected to two diagonally distributed rollers (51) via a rotating shaft, and the two ends of the sealing sliding belt (5) are respectively wound on the two rollers (51), one of the rollers (51) is driven by a sliding belt motor, and a first torsion spring is sleeved on the rotating shaft of the other roller (51), one end of the first torsion spring is connected to the cabinet (1), and the other end of the first torsion spring is connected to the rotating shaft, and a guide wheel (52) is also provided inside the cabinet (1) between the two rollers (51).

5. The control cabinet with a dehumidification and dust removal device used in a hydropower station according to claim 3, characterized in that: Limiting plates (53) are respectively provided on the inner sides of the first ventilation opening (11) and the second ventilation opening (12) at the two side edges of the sealing sliding belt (5), and the limiting plates (53) are provided with limiting grooves (54) for the edges of the sealing sliding belt (5) to pass through.

6. The control cabinet with dehumidification and dust removal device used in a hydropower station according to claim 5, characterized in that: A fixing seat (55) is provided in the limiting groove (54) on a side close to the interior of the cabinet (1), a mounting groove (56) is provided in the fixing seat (55), a roller seat (58) is connected in the mounting groove (56) via a compression spring (57), and a pressing wheel (59) is provided on the roller seat (58) for pressing the sealing sliding belt (5) toward the exterior of the cabinet (1).

7. The control cabinet with a dehumidification and dust removal device for use in a hydropower station according to claim 1, characterized in that: The gas outlet end of the pulse gas pipe (3) is provided with a main pipe (31) extending into the interior of the cabinet (1), the main pipe (31) is provided with a plurality of branch pipes (32), and the branch pipes (32) are provided with a plurality of telescopic branch pipes (33) extending between adjacent electrical components.

8. The control cabinet with a dehumidification and dust removal device for use in a hydropower station according to claim 7, characterized in that: The telescopic branch pipe (33) comprises an outer pipe (331) rotatably connected to the branch pipe (32); the inner pipe (332) is connected to the inner pipe (332) via an inner thread of the outer pipe (331); the outer portion of the outer pipe (331) is fixedly connected to a transmission gear (333); the transmission gears (333) on adjacent outer pipes (331) are connected via a synchronous belt (334); one of the transmission gears (333) is connected to a driving gear (335) via the synchronous belt (334); and the driving gear (335) is mounted on an output shaft of a driving motor (336).

9. The control cabinet with a dehumidification and dust removal device for use in a hydropower station according to claim 7, characterized in that: The end of the telescopic branch pipe (33) is rotatably connected to an air outlet seat (6), one side of the air outlet seat (6) is provided with an air outlet head (61) that is inclined upward, and a guide drive plate (62) is provided on the air outlet seat (6) above the air outlet head (61), and a rotating shaft (63) rotatably connected to the air outlet seat (6) is provided in the middle of the guide drive plate (62), and a second torsion spring (64) is sleeved on the rotating shaft (63), one end of the second torsion spring (64) is connected to the air outlet seat (6), and the other end of the second torsion spring (64) is connected to the guide drive plate (62), and one end of the guide drive plate (62) is provided with a first guide portion (651) and a second guide portion (652) that are centrally symmetrical and arc-shaped, and the first guide portion (651) and the second guide portion (652) are provided. A guide groove (653) corresponding to the gas outlet direction of the gas outlet head (61) is provided on the opposite side of the first guide part (651) and the second guide part (652); a gas outlet hole (654) is provided between the first guide part (651) and the second guide part (652); an impact active block (66) is provided at the other end of the guide driving plate (62); and an impact passive block (67) corresponding to the impact active block (66) is provided on the gas outlet seat (6); in a non-gas-out state, the second guide part (652) is connected to the gas outlet seat (6) by the second torsion spring (64) to close the gas outlet head (61); in a gas-out state, the gas impacts the second guide part (652), so that the second guide part (652) and the gas outlet seat (6) are separated to release gas.

10. The control cabinet with dehumidification and dust removal device used in a hydropower station according to claim 1, characterized in that: A blocking needle (68) is provided on the side of the air outlet seat (6) near the air outlet head (61), and the blocking needle (68) is threadedly passed through the air outlet seat (6) in a transverse direction, and the needle head of the blocking needle (68) corresponds to the air outlet direction of the air outlet head (61); a sliding plate (69) is provided on the top of the air outlet seat (6), and a connecting hole is provided on the sliding plate (69), and a long groove corresponding to the connecting hole is provided on the air outlet seat (6).

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