CN216700726U

CN216700726U - Dustproof heat dissipation electric cabinet for turbine

Info

Publication number: CN216700726U
Application number: CN202121257906.3U
Authority: CN
Inventors: 马英杰; 闫冬成
Original assignee: Jiehu Sian Energy Saving Technology Co ltd
Current assignee: Jiehu Sian Energy Saving Technology Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2022-06-07
Anticipated expiration: 2031-06-07

Abstract

The utility model discloses a dustproof heat-dissipation electric cabinet for a turbine, which comprises an electric cabinet main body, wherein a top plate is fixedly arranged on the outer surface of the upper end of the electric cabinet main body, a heat-dissipation mechanism is fixedly arranged on the outer surface of the upper end of the top plate, an auxiliary mechanism is arranged on one side of the heat-dissipation mechanism, supporting rods are fixedly arranged at four corners of the outer surface of the lower end of the electric cabinet main body, and self-locking universal wheels are fixedly arranged on the outer surface of the lower end of each supporting rod. According to the dustproof heat dissipation electric cabinet for the turbine, the auxiliary mechanism is arranged, firstly, the switch is pressed down, an external power supply is connected with the controller, the controller controls the temperature sensor to operate, the temperature sensor transmits a detected signal to the controller, when the temperature in the electric cabinet main body is too high, the temperature sensor transmits the detected signal to the controller, and the controller controls the heat dissipation mechanism to operate.

Description

Dustproof heat dissipation electric cabinet for turbine

Technical Field

The utility model relates to the technical field of turbine equipment, in particular to a dustproof heat-dissipation electric cabinet for a turbine.

Background

The turbine is a transliteration of English turbo, is derived from Latin turbo, and means a rotating object, is a machine for mutually converting energy and mechanical energy in a fluid medium, and not only is a compressor, but also a steam turbine, a flue gas turbine and an expander can be called turbines, working media of the turbines can be gas or liquid, water is used as a water turbine of the working media, steam is used as a steam turbine of the working media, and gas is used as a gas turbine of the working media, namely a gas turbine.

In the prior art, a chinese patent document with patent application number CN202022302625.7 describes a dustproof heat dissipation electric cabinet for turbine, this patent drives the fan blade on the upper portion of the heat dissipation box through the heat dissipation motor to rotate, thereby performing heat dissipation work, and make the refrigerator continuously refrigerate, cool air circulation is performed through the cooling coil, the wind inside the heat dissipation box continuously blows down along with, thereby performing ventilation and heat dissipation work, so as to ensure the working stability of the device, however, the heat dissipation is not intelligent enough, which causes the waste of energy, and the heat dissipation effect is poor, and certain adverse effect is brought to people's use, for this reason, we propose a dustproof heat dissipation electric cabinet for turbine.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides the dustproof heat dissipation electric cabinet for the turbine, which has the advantages of capability of controlling the operation and the closing of a heat dissipation mechanism according to the temperature in the electric cabinet main body, good heat dissipation effect and the like, and can effectively solve the problems in the background art.

(II) technical scheme

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a turbine is with electric cabinet of preventing dust heat dissipation, includes electric cabinet main part, the upper end surface fixed mounting of electric cabinet main part has the roof, the upper end surface fixed mounting of roof has heat dissipation mechanism, one side of heat dissipation mechanism is provided with complementary unit, just four corners fixed mounting of electric cabinet main part lower extreme surface has the bracing piece, the lower extreme surface fixed mounting of bracing piece has the auto-lock universal wheel, just the front end surface of electric cabinet main part is provided with the guard gate, be provided with hinge and buckle between guard gate and the electric cabinet main part, one side surface of guard gate passes through hinge and electric cabinet main part swing joint, the opposite side surface of guard gate can dismantle with the electric cabinet main part through the buckle and be connected, just first louvre has all been seted up to the bottom of electric cabinet main part and the side of electric cabinet main part, complementary unit includes switch, controller, Joint and temperature sensor, just temperature sensor fixed mounting is in the inner wall on electric cabinet main part right side, switch fixed mounting is in one side of temperature sensor, controller fixed mounting is in the upper end surface of roof, the output of switch and the input electric connection of controller, the output of controller and the output electric connection who connects, heat dissipation mechanism, the output that connects and temperature sensor's input electric connection, temperature sensor's output and the input electric connection of controller.

Preferably, the heat dissipation mechanism comprises a transmission case, a first rotating shaft, a first bevel gear, a second heat dissipation hole, a motor, a second rotating shaft, a third rotating shaft, a first transmission gear, a second transmission gear, a fourth rotating shaft, a third transmission gear, a first heat dissipation fan, an installation cavity and a second heat dissipation fan, the transmission case is fixedly installed on the upper end outer surface of the top plate, the second heat dissipation hole is arranged on the upper end outer surface of the transmission case, the motor is fixedly installed inside the transmission case, the first rotating shaft is located on the one end outer surface of the motor, the second bevel gear is fixedly installed on the outer wall of the first rotating shaft, the first bevel gear is located on one side outer surface of the second bevel gear, the second rotating shaft is fixedly installed on the lower end outer surface of the first bevel gear, the second heat dissipation fan is fixedly installed on the lower end outer surface of the second rotating shaft, the third transmission gear is fixedly installed on the outer wall of the middle portion of the second rotating shaft, the installation cavity is opened in the inside of roof, the quantity of first drive gear is two sets of, just two sets of first drive gear be located third drive gear's both sides surface, second drive gear's quantity is two sets of, second drive gear is located one side surface of first drive gear, second drive gear fixed mounting is in the outer wall on fourth pivot upper portion, first heat dissipation fan fixed mounting is in the lower extreme surface of fourth pivot, just second drive gear, first drive gear and third drive gear all are located the installation cavity inside.

Preferably, intermeshing between first bevel gear and the second bevel gear, intermeshing between first transmission gear and second drive gear, the third drive gear, just first transmission gear is through third pivot and roof fixed connection, all be provided with sealed bearing between fourth pivot, second pivot and third pivot and the roof, fourth pivot, second pivot and third pivot pass through sealed bearing and roof swing joint, be provided with sealed bearing between first pivot and the transmission case, first pivot passes through sealed bearing and transmission case swing joint, just the inside of second louvre, first louvre all is provided with dustproof filter screen.

(III) advantageous effects

Compared with the prior art, the utility model provides a dustproof heat-dissipation electric cabinet for a turbine, which has the following beneficial effects:

1. this turbine is with electric cabinet of dustproof heat dissipation, the complementary unit who sets up, press the switch at first, for the controller switch-on outside power, through the operation of controller control temperature sensor, temperature sensor gives the controller with the signal transmission that detects, when the temperature of electricity cabinet main part is too high, temperature sensor transmits the signal transmission that detects to the controller, the controller control heat dissipation mechanism operates, compare current technique more energy-conservation, the specification customization of its controller is accessible, measuring error is 1 ℃, operating voltage is 5V, output signal 10mA, the precision grade is I, temperature sensor's model is WZP-035, the measured temperature is-100 ℃ -200 ℃.

2. The dustproof heat dissipation electric cabinet for the turbine is provided with the heat dissipation mechanism, the rotation of a first rotating shaft is driven by the operation of a motor, the rotation of a second bevel gear is driven by the first rotating shaft, the rotation of the first bevel gear drives the rotation of a first bevel gear, the rotation of the first bevel gear drives a second rotating shaft and a third transmission gear, the rotation of the second rotating shaft drives a second heat dissipation fan to rotate to dissipate heat in the electric cabinet main body, the rotation of the third transmission gear drives the rotation of two groups of third rotating shafts, the third rotating shaft drives the rotation of the second transmission gear, the rotation of the second transmission gear drives the first heat dissipation fan to rotate through a fourth rotating shaft, the purpose that one group of second heat dissipation fans and two groups of first heat dissipation fans are driven by a one-step motor to rotate to dissipate heat is achieved, the heat dissipation effect is fast, and the first heat dissipation holes and the second heat dissipation holes are arranged to facilitate the energy exchange with the outside air, and the dustproof filter screen plays a certain dustproof role.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a dustproof heat-dissipation electric cabinet for a turbine according to the present invention.

Fig. 2 is a schematic structural diagram of a heat dissipation mechanism in a dustproof heat dissipation electric cabinet for a turbine according to the present invention.

FIG. 3 is a schematic diagram of the operation of the auxiliary mechanism in the dustproof heat dissipation electrical cabinet for a turbine according to the present invention.

In the figure: 1. an electric cabinet main body; 2. a support bar; 3. a self-locking universal wheel; 4. a protective door; 5. a hinge; 6. Buckling; 7. a first heat dissipation hole; 8. a top plate; 9. a heat dissipation mechanism; 10. an auxiliary mechanism; 11. a switch; 12. a controller; 13. a joint; 14. a temperature sensor; 15. a transmission case; 16. a first rotating shaft; 17. A first bevel gear; 18. a second bevel gear; 19. a second heat dissipation hole; 20. a motor; 21. a second rotating shaft; 22. a third rotating shaft; 23. a first drive gear; 24. a second transmission gear; 25. a fourth rotating shaft; 26. a third transmission gear; 27. a first heat dissipation fan; 28. a second heat dissipation fan; 29. a dustproof filter screen; 30. and (7) installing a cavity.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

Detailed description of the preferred embodiment

The embodiment is a dustproof heat dissipation electric cabinet for a turbine.

As shown in fig. 1-3, the electric cabinet comprises an electric cabinet main body 1, a top plate 8 is fixedly installed on the outer surface of the upper end of the electric cabinet main body 1, a heat dissipation mechanism 9 is fixedly installed on the outer surface of the upper end of the top plate 8, an auxiliary mechanism 10 is arranged on one side of the heat dissipation mechanism 9, support rods 2 are fixedly installed at four corners of the outer surface of the lower end of the electric cabinet main body 1, self-locking universal wheels 3 are fixedly installed on the outer surface of the lower end of each support rod 2, a protective door 4 is arranged on the outer surface of the front end of the electric cabinet main body 1, a hinge 5 and a buckle 6 are arranged between each protective door 4 and the electric cabinet main body 1, the outer surface of one side of each protective door 4 is movably connected with the electric cabinet main body 1 through the hinge 5, the outer surface of the other side of each protective door 4 is detachably connected with the electric cabinet main body 1 through the buckle 6, and first heat dissipation holes 7 are formed in the bottom of the electric cabinet main body 1 and the side of the electric cabinet main body 1; the auxiliary mechanism 10 comprises a switch 11, a controller 12, a joint 13 and a temperature sensor 14, the temperature sensor 14 is fixedly arranged on the inner wall of the right side of the electric cabinet main body 1, the switch 11 is fixedly arranged on one side of the temperature sensor 14, and the controller 12 is fixedly arranged on the outer surface of the upper end of the top plate 8; the output end of the switch 11 is electrically connected to the input end of the controller 12, the output end of the controller 12 is electrically connected to the connector 13 and the output end of the heat dissipation mechanism 9, the output end of the connector 13 is electrically connected to the input end of the temperature sensor 14, and the output end of the temperature sensor 14 is electrically connected to the input end of the controller 12.

The heat dissipation mechanism 9 includes a transmission case 15, a first rotating shaft 16, a first bevel gear 17, a second bevel gear 18, a second heat dissipation hole 19, a motor 20, a second rotating shaft 21, a third rotating shaft 22, a first transmission gear 23, a second transmission gear 24, a fourth rotating shaft 25, a third transmission gear 26, a first heat dissipation fan 27, a mounting cavity 30 and a second heat dissipation fan 28, wherein the transmission case 15 is fixedly mounted on the outer surface of the upper end of the top plate 8, the second heat dissipation hole 19 is opened on the outer surface of the upper end of the transmission case 15, the motor 20 is fixedly mounted inside the transmission case 15, the first rotating shaft 16 is located on the outer surface of one end of the motor 20, the second bevel gear 18 is fixedly mounted on the outer wall of the first rotating shaft 16, the first bevel gear 17 is located on the outer surface of one side of the second bevel gear 18, the second rotating shaft 21 is fixedly mounted on the outer surface of the lower end of the first bevel gear 17, the second heat dissipation fan 28 is fixedly mounted on the outer surface of the lower end of the second rotating shaft 21, the third transmission gear 26 is fixedly installed on the outer wall of the middle part of the second rotating shaft 21, the installation cavity 30 is opened inside the top plate 8, the number of the first transmission gears 23 is two, the two first transmission gears 23 are located on the outer surfaces of the two sides of the third transmission gear 26, the number of the second transmission gears 24 is two, the second transmission gear 24 is located on the outer surface of one side of the first transmission gear 23, the second transmission gear 24 is fixedly installed on the outer wall of the upper part of the fourth rotating shaft 25, the first heat dissipation fan 27 is fixedly installed on the outer surface of the lower end of the fourth rotating shaft 25, and the second transmission gear 24, the first transmission gears 23 and the third transmission gear 26 are all located inside the installation cavity 30; the first bevel gear 17 is meshed with the second bevel gear 18, the first transmission gear 23 is meshed with the second transmission gear 24 and the third transmission gear 26, the first transmission gear 23 is fixedly connected with the top plate 8 through the third rotating shaft 22, sealing bearings are arranged between the fourth rotating shaft 25, the second rotating shaft 21 and the third rotating shaft 22 as well as between the top plate 8, the fourth rotating shaft 25, the second rotating shaft 21 and the third rotating shaft 22 are movably connected with the top plate 8 through the sealing bearings, the sealing bearings are arranged between the first rotating shaft 16 and the transmission case 15, the first rotating shaft 16 is movably connected with the transmission case 15 through the sealing bearings, and dustproof filter screens 29 are arranged inside the second heat dissipation holes 19 and the first heat dissipation holes 7.

The utility model is a dustproof heat dissipation electric cabinet for turbine, the auxiliary mechanism 10 is arranged, firstly, the switch 11 is pressed down, the controller 12 is connected with an external power supply, the controller 12 controls the operation of the temperature sensor 14, the temperature sensor 14 transmits a detected signal to the controller 12, when the temperature in the electric cabinet main body 1 is overhigh, the temperature sensor 14 transmits the detected signal to the controller 12, and the controller 12 controls the heat dissipation mechanism 9 to operate, compared with the prior art, the dustproof heat dissipation electric cabinet is more energy-saving, the specification of the controller 12 can be customized, the measurement error is +/-1 ℃, the working voltage is 5V, the output signal is 10mA, the precision grade is I, the model of the temperature sensor 14 is WZP-035, and the measurement temperature is-100 ℃ to 200 ℃; the arranged heat dissipation mechanism 9 drives the rotation of the first rotating shaft 16 through the operation of the motor 20, the first rotating shaft 16 drives the rotation of the second bevel gear 18, the second bevel gear 18 drives the rotation of the first bevel gear 17, the rotation of the first bevel gear 17 drives the rotation of the second rotating shaft 21 and the third transmission gear 26, the rotation of the second rotating shaft 21 drives the rotation of the second heat dissipation fan 28 to dissipate heat inside the electric cabinet main body 1, the rotation of the third transmission gear 26 drives the rotation of the two sets of third rotating shafts 22, the third rotating shaft 22 drives the rotation of the second transmission gear 24, the rotation of the second transmission gear 24 drives the first heat dissipation fan 27 through the fourth rotating shaft 25 to realize the rotation heat dissipation of the set of second heat dissipation fans 28 and the two sets of first heat dissipation fans 27 through the one-step motor 20, the heat dissipation effect is fast, and the arranged first heat dissipation holes 7 and the second heat dissipation holes 19 are arranged, the dust-proof filter screen 29 is convenient for exchanging energy with the outside air, and plays a certain dust-proof role.

Detailed description of the utility model

The embodiment is an embodiment of a heat dissipation mechanism 9 in a dustproof heat dissipation electric cabinet for a turbine.

As shown in fig. 1 and 2, a heat dissipation mechanism 9 for a dustproof heat dissipation electrical cabinet for a turbine, the heat dissipation mechanism 9 includes a transmission case 15, a first rotating shaft 16, a first bevel gear 17, a second bevel gear 18, a second heat dissipation hole 19, a motor 20, a second rotating shaft 21, a third rotating shaft 22, a first transmission gear 23, a second transmission gear 24, a fourth rotating shaft 25, a third transmission gear 26, a first heat dissipation fan 27, a mounting cavity 30, and a second heat dissipation fan 28, wherein the transmission case 15 is fixedly mounted on an upper outer surface of a top plate 8, the second heat dissipation hole 19 is formed in an upper outer surface of the transmission case 15, the motor 20 is fixedly mounted inside the transmission case 15, the first rotating shaft 16 is located on an outer surface of one end of the motor 20, the second bevel gear 18 is fixedly mounted on an outer wall of the first rotating shaft 16, the first bevel gear 17 is located on an outer surface of one side of the second bevel gear 18, the second rotating shaft 21 is fixedly mounted on an outer surface of a lower end of the first bevel gear 17, the second heat dissipation fan 28 is fixedly installed on the outer surface of the lower end of the second rotating shaft 21, the third transmission gear 26 is fixedly installed on the outer wall of the middle part of the second rotating shaft 21, the installation cavity 30 is opened inside the top plate 8, the number of the first transmission gears 23 is two, the two groups of first transmission gears 23 are located on the outer surfaces of two sides of the third transmission gear 26, the number of the second transmission gears 24 is two, the second transmission gear 24 is located on the outer surface of one side of the first transmission gear 23, the second transmission gear 24 is fixedly installed on the outer wall of the upper part of the fourth rotating shaft 25, the first heat dissipation fan 27 is fixedly installed on the outer surface of the lower end of the fourth rotating shaft 25, and the second transmission gear 24, the first transmission gear 23 and the third transmission gear 26 are all located inside the installation cavity 30; the first bevel gear 17 is meshed with the second bevel gear 18, the first transmission gear 23 is meshed with the second transmission gear 24 and the third transmission gear 26, the first transmission gear 23 is fixedly connected with the top plate 8 through the third rotating shaft 22, sealing bearings are arranged between the fourth rotating shaft 25, the second rotating shaft 21 and the third rotating shaft 22 as well as between the top plate 8, the fourth rotating shaft 25, the second rotating shaft 21 and the third rotating shaft 22 are movably connected with the top plate 8 through the sealing bearings, the sealing bearings are arranged between the first rotating shaft 16 and the transmission case 15, the first rotating shaft 16 is movably connected with the transmission case 15 through the sealing bearings, and dustproof filter screens 29 are arranged inside the second heat dissipation holes 19 and the first heat dissipation holes 7.

Detailed description of the preferred embodiment

The embodiment is an embodiment of an auxiliary mechanism 10 in a dustproof heat-dissipation electric cabinet for a turbine.

As shown in fig. 1 and 3, an auxiliary mechanism 10 for a dustproof heat dissipation electric cabinet for a turbine includes a switch 11, a controller 12, a joint 13 and a temperature sensor 14, wherein the temperature sensor 14 is fixedly installed on the inner wall of the right side of an electric cabinet main body 1, the switch 11 is fixedly installed on one side of the temperature sensor 14, and the controller 12 is fixedly installed on the outer surface of the upper end of a top plate 8; the output end of the switch 11 is electrically connected to the input end of the controller 12, the output end of the controller 12 is electrically connected to the connector 13 and the output end of the heat dissipation mechanism 9, the output end of the connector 13 is electrically connected to the input end of the temperature sensor 14, and the output end of the temperature sensor 14 is electrically connected to the input end of the controller 12.

It is noted that, herein, relational terms such as first and second (a, b, etc.) and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a turbine is with electric cabinet of dustproof heat dissipation, includes electric cabinet main part (1), its characterized in that: the electric cabinet is characterized in that a top plate (8) is fixedly arranged on the outer surface of the upper end of an electric cabinet main body (1), a heat dissipation mechanism (9) is fixedly arranged on the outer surface of the upper end of the top plate (8), an auxiliary mechanism (10) is arranged on one side of the heat dissipation mechanism (9), supporting rods (2) are fixedly arranged at four corners of the outer surface of the lower end of the electric cabinet main body (1), self-locking universal wheels (3) are fixedly arranged on the outer surface of the lower end of each supporting rod (2), a protective door (4) is arranged on the outer surface of the front end of the electric cabinet main body (1), a hinge (5) and a buckle (6) are arranged between the protective door (4) and the electric cabinet main body (1), the outer surface of one side of the protective door (4) is movably connected with the electric cabinet main body (1) through the hinge (5), and the outer surface of the other side of the protective door (4) is detachably connected with the electric cabinet main body (1) through the buckle (6), and the bottom of the electric cabinet main body (1) and the side surface of the electric cabinet main body (1) are both provided with first heat dissipation holes (7), the auxiliary mechanism (10) comprises a switch (11), a controller (12), a joint (13) and a temperature sensor (14), and the temperature sensor (14) is fixedly arranged on the inner wall of the right side of the electric cabinet main body (1), the switch (11) is fixedly arranged at one side of the temperature sensor (14), the controller (12) is fixedly arranged at the outer surface of the upper end of the top plate (8), the output end of the switch (11) is electrically connected with the input end of the controller (12), the output end of the controller (12) is electrically connected with the joint (13) and the output end of the heat dissipation mechanism (9), the output end of the joint (13) is electrically connected with the input end of the temperature sensor (14), the output end of the temperature sensor (14) is electrically connected with the input end of the controller (12).

2. The dustproof heat dissipation electric cabinet for the turbine according to claim 1, characterized in that: the heat dissipation mechanism (9) comprises a transmission case (15), a first rotating shaft (16), a first bevel gear (17), a second bevel gear (18), a second heat dissipation hole (19), a motor (20), a second rotating shaft (21), a third rotating shaft (22), a first transmission gear (23), a second transmission gear (24), a fourth rotating shaft (25), a third transmission gear (26), a first heat dissipation fan (27), a mounting cavity (30) and a second heat dissipation fan (28), the transmission case (15) is fixedly mounted on the outer surface of the upper end of the top plate (8), the second heat dissipation hole (19) is formed in the outer surface of the upper end of the transmission case (15), the motor (20) is fixedly mounted inside the transmission case (15), the first rotating shaft (16) is located on the outer surface of one end of the motor (20), the second bevel gear (18) is fixedly mounted on the outer wall of the first rotating shaft (16), the first bevel gear (17) is positioned on the outer surface of one side of the second bevel gear (18), the second rotating shaft (21) is fixedly installed on the outer surface of the lower end of the first bevel gear (17), the second heat dissipation fan (28) is fixedly installed on the outer surface of the lower end of the second rotating shaft (21), the third transmission gear (26) is fixedly installed on the outer wall of the middle part of the second rotating shaft (21), the installation cavity (30) is arranged in the top plate (8), the first transmission gears (23) are two groups, the two groups of first transmission gears (23) are positioned on the outer surfaces of two sides of the third transmission gear (26), the second transmission gears (24) are two groups, the second transmission gears (24) are positioned on the outer surface of one side of the first transmission gears (23), and the second transmission gears (24) are fixedly installed on the outer wall of the upper part of the fourth rotating shaft (25), the first heat dissipation fan (27) is fixedly installed on the outer surface of the lower end of the fourth rotating shaft (25), and the second transmission gear (24), the first transmission gear (23) and the third transmission gear (26) are all located inside the installation cavity (30).

3. The dustproof heat dissipation electric cabinet for the turbine according to claim 2, characterized in that: the first bevel gear (17) and the second bevel gear (18) are meshed with each other, the first transmission gear (23), the second transmission gear (24) and the third transmission gear (26) are meshed with each other, and the first transmission gear (23) is fixedly connected with the top plate (8) through a third rotating shaft (22), sealing bearings are arranged among the fourth rotating shaft (25), the second rotating shaft (21), the third rotating shaft (22) and the top plate (8), the fourth rotating shaft (25), the second rotating shaft (21) and the third rotating shaft (22) are movably connected with the top plate (8) through sealed bearings, a sealing bearing is arranged between the first rotating shaft (16) and the transmission case (15), the first rotating shaft (16) is movably connected with the transmission case (15) through a sealing bearing, and dustproof filter screens (29) are arranged in the second heat dissipation holes (19) and the first heat dissipation holes (7).