Rail type granary ventilation ventilator

Abstract

The utility model belongs to the technical field of ventilators, and discloses a rail type granary ventilation ventilator which comprises a machine box, a transmission module is arranged in the machine box, a ventilation module and a rotatable annular filter screen are installed on the transmission module in a transmission mode, and a protruding shaft is rotatably installed in the machine box. A group of eccentric plates which are regularly distributed and drive the annular filter screen to periodically deform are mounted on the convex shaft, a tensioning frame is mounted on the case in a sliding manner, two tensioning springs limited by the case are mounted on the side surface of the tensioning frame, a tensioning roller attached to the annular filter screen is rotatably mounted on the inner wall of the tensioning frame, and a rotating plate is rotatably mounted at the tail end of the case. The filter screen self-cleaning performance is excellent, the eccentric plate on the convex shaft is attached to the inner surface of the annular filter screen, along with rotation of the convex shaft, the eccentric plate periodically extrudes the annular filter screen to enable the annular filter screen to deform, dust and impurities attached to the filter screen can be shaken off through the unique design, automatic cleaning without shutdown is achieved, and the filter screen self-cleaning effect is good. And the angle of external airflow flowing through the filter holes can be changed.

Description

Technical Field

[0001] This utility model belongs to the field of ventilation technology, specifically a track-type grain silo ventilation fan. Background Technology

[0002] In the grain storage sector, ventilation fans are crucial equipment for ensuring grain storage quality. Various types of grain warehouse ventilation fans have emerged in the existing technology. For example, patent document CN220402459U discloses a mobile ventilation fan for grain warehouses. This mobile ventilation fan uses spring force and plug-in connection to fix the filter unit, making subsequent disassembly and installation of the filter unit within the grain warehouse simple. However, the above-mentioned ventilation fan has the following technical problems in use:

[0003] 1. The filter screen is prone to clogging and is not easy to clean online;

[0004] 2. The fixed air intake angle of traditional ventilators cannot meet the ventilation needs of different locations within the grain silo;

[0005] 3. The problem of not being able to monitor filter clogging in real time;

[0006] Based on this, the present invention provides a track-mounted grain silo ventilation fan to solve the technical problems mentioned in the background art. Utility Model Content

[0007] The purpose of this invention is to address the above-mentioned problems. This invention provides a track-type grain silo ventilation fan. This invention excels in the self-cleaning of the filter screen. The eccentric plate on the convex shaft fits against the inner surface of the ring filter screen. As the convex shaft rotates, the eccentric plate periodically squeezes the ring filter screen, causing it to deform. This unique design not only shakes off the dust and impurities attached to the filter screen, achieving automatic cleaning without stopping the machine, but also effectively reduces the clogging rate of external dirt in the filter holes by changing the angle of external airflow through the filter holes.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a track-mounted grain silo ventilation fan, comprising a casing, a transmission module inside the casing, a ventilation module and a rotatable ring filter screen mounted on the transmission module, a convex shaft rotatably mounted inside the casing, a set of regularly distributed eccentric plates that drive the ring filter screen to periodically deform on the convex shaft, a tensioning frame slidably mounted on the casing, two tensioning springs limited by the casing mounted on the side of the tensioning frame, tensioning rollers that fit against the ring filter screen rotatably mounted on the inner wall of the tensioning frame, a rotating plate rotatably mounted at the tail end of the casing, a louvered frame connected to the rotating plate, a set of regularly distributed louvers rotatably mounted on the louvered frame, multiple louvers being linked by a first belt, a linkage module on the casing for driving the rotating plate to rotate and driving the louvers to reciprocate and rotate, the convex shaft being driven by the linkage module, and a monitoring component on the casing for real-time detection of the wind speed difference between the inside and outside of the ring filter screen and feedback of a blockage signal.

[0009] As a preferred technical solution of this utility model, the transmission module includes a motor installed in the chassis and four guide rollers rotatably installed in the chassis. All four guide rollers are connected to the ring filter screen. A drive gear is installed on the output shaft end of the motor. A reduction gear that meshes with the drive gear is fixedly installed on one of the guide rollers. The radius of the reduction gear is 3 to 5 times the radius of the drive gear.

[0010] As a preferred embodiment of this utility model, the ventilation module includes a bracket installed inside a chassis. A fan shaft is rotatably mounted on the inner wall of the bracket. A set of fan blades arranged in a circular array are mounted on the fan shaft. The fan blades are located inside the ring filter. A synchronous shaft is rotatably mounted on the chassis. A first bevel gear is mounted at the tail end of both the synchronous shaft and the fan shaft. The two first bevel gears mesh with each other. A second belt is driven and mounted on the output shaft end of the motor. The synchronous shaft is connected to the second belt for transmission.

[0011] As a preferred technical solution of this utility model, the linkage module includes a rotating shaft rotatably mounted on the chassis, a second bevel gear mounted at the tail end of the rotating shaft, a driven bevel gear ring fixedly mounted on the rotating plate and connected to the second bevel gear, a third belt being drivenly mounted on the rotating shaft, and the cam shaft and a guide roller being connected to the third belt.

[0012] As a preferred technical solution of this utility model, the linkage module further includes a fixed bevel gear ring installed at the rear of the chassis. A gear shaft and an internal gear are rotatably mounted on the rotating plate. A third bevel gear, which is connected to the fixed bevel gear ring, is installed at the tail of the gear shaft. An incomplete gear is installed on the gear shaft. The teeth of the incomplete gear cover a 90-degree circumferential central angle, and the remaining circumferential area is toothless. An external gear is installed on the louver plate. Both the incomplete gear and the external gear are connected to the internal gear. The internal gear, the external gear, and the incomplete gear have the same radius.

[0013] As a preferred technical solution of this utility model, it also includes a guide rail frame, and a walking platform that cooperates with the guide rail frame is installed on the top surface of the chassis.

[0014] As a preferred embodiment of this utility model, the monitoring component includes two wind speed sensors mounted on the chassis. One wind speed sensor is located inside the ring filter, and the other wind speed sensor is located outside the ring filter. A microcontroller is mounted on the end face of the chassis. The data terminals of both wind speed sensors are connected to the microcontroller. The microcontroller triggers a clearing warning signal based on the wind speed difference threshold between the two wind speed sensors.

[0015] As a preferred embodiment of this utility model, a dust collection tray is slidably installed on the inner wall of the chassis at a position corresponding to the lower part of the ring filter screen.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model excels in filter self-cleaning. The eccentric plate on the convex shaft fits against the inner surface of the ring filter. As the convex shaft rotates, the eccentric plate periodically squeezes the ring filter, causing it to deform. This unique design not only shakes off the dust and impurities attached to the filter, achieving automatic cleaning without stopping the machine, but also effectively reduces the clogging rate of external dirt in the filter holes by changing the angle of external airflow through the filter holes. At the same time, the ring filter forms a shaking state due to periodic squeezing, further enhancing the self-cleaning effect and ensuring that the filter is always well ventilated. This greatly improves the working efficiency of the ventilator and fundamentally solves the problem of easy clogging and difficult cleaning of traditional ventilator filters.

[0018] 2. The coordinated operation of the louvers and the linkage module in this utility model greatly facilitates ventilation. The linkage module drives the rotating shaft to rotate, which in turn drives the rotating plate to rotate, thereby changing the angle of the louver frame. At the same time, the louvers reciprocate and rotate. In this way, the air inlet direction and angle can be flexibly adjusted according to the actual ventilation needs of different locations in the grain warehouse, significantly improving the ventilation effect. In addition, the reciprocating change of the louver angle can also reciprocate the change of the angle of airflow into the ring filter, further improving the air inlet efficiency of the ring filter, better meeting the diverse ventilation requirements of grain storage, and solving the drawback of the fixed air inlet angle of traditional ventilators.

[0019] 3. The monitoring component in this utility model monitors the wind speed difference between the inside and outside of the ring filter in real time and promptly reports blockage signals, facilitating timely cleaning and maintenance by staff. These designs work together to ensure the continuous and efficient operation of the ventilator, providing a stable ventilation environment for grain storage, ensuring grain quality and safety. Furthermore, through the guide rail and walking platform, the motor does not need to drive the movement function during operation. It can be manually pushed or driven by an external drive device to smoothly slide along the guide rail to the specific location in the grain warehouse that requires ventilation. This design solves the problem of the fixed position of traditional ventilators and can fully cover all corners of the grain warehouse, avoiding ventilation dead spots. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the track-mounted grain silo ventilation fan of this utility model;

[0021] Figure 2 This utility model Figure 1 A magnified schematic diagram of the local structure at point A;

[0022] Figure 3 This is a schematic diagram of the reduction gear and louver plate of this utility model;

[0023] Figure 4 This is a cross-sectional structural diagram of the fan shaft and louver frame of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the rotary plate and louvered frame of this utility model;

[0025] Figure 6 This utility model Figure 5 A magnified view of the structure at point B in the middle;

[0026] Figure 7 This is a schematic diagram of the structure of the fan blade and fan shaft of this utility model;

[0027] Figure 8 This is a schematic diagram of the convex shaft and eccentric plate of this utility model.

[0028] In the diagram: 1. Chassis; 2. Ring filter; 3. Convex shaft; 4. Eccentric plate; 5. Tensioning frame; 6. Tensioning spring; 7. Tensioning roller; 8. Rotary plate; 9. Louvered frame; 10. Louvered plate; 11. Guide roller; 12. Motor; 13. Reduction gear; 14. Support; 15. Fan shaft; 16. Fan blade; 17. Synchronous shaft; 18. Rotating shaft; 19. Fixed bevel gear ring; 20. Gear shaft; 21. Internal gear; 22. Incomplete gear; 23. External gear; 24. Guide rail frame; 25. Walking platform; 26. Wind speed sensor; 27. Microcontroller; 28. Dust collection drawer. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figures 1 to 8 As shown, this utility model provides a track-mounted grain silo ventilation fan, including a casing 1;

[0031] It also includes a guide rail frame 24, and a walking platform 25 that cooperates with the guide rail frame 24 is installed on the top surface of the chassis 1;

[0032] When the ventilator is running, the motor 12 does not need to drive the movement function. Instead, the walking platform 25 slides smoothly along the guide rail frame 24 via rollers or sliders. When ventilation is required in different areas of the grain warehouse, the staff can manually push the ventilator or use an external drive device to move it on the guide rail frame 24. This solution solves the problem of traditional ventilators having fixed positions and being unable to fully cover the grain warehouse for uniform ventilation. The beneficial effect is that the ventilator can be accurately moved to the specific location in the grain warehouse that needs ventilation, achieving effective ventilation in every corner of the grain warehouse, avoiding ventilation dead spots, comprehensively improving the ventilation quality of the grain storage environment, and ensuring the safety of grain storage.

[0033] The chassis 1 is equipped with a transmission module, on which a ventilation module and a rotatable ring filter 2 are mounted.

[0034] The transmission module includes a motor 12 installed in the housing 1 and four guide rollers 11 rotatably installed in the housing 1. All four guide rollers 11 are connected to the ring filter screen 2 in a transmission manner. The ring filter screen 2 is evenly distributed with filter holes.

[0035] A drive gear is installed on the output shaft end of the motor 12, and a reduction gear 13 that meshes with the drive gear is fixedly installed on a guide roller 11. The radius of the reduction gear 13 is 5 times the radius of the drive gear.

[0036] The ventilation module includes a bracket 14 installed inside the housing 1. A fan shaft 15 is rotatably mounted on the inner wall of the bracket 14. A set of fan blades 16 arranged in a circular array are mounted on the fan shaft 15. The fan blades 16 are located inside the ring filter 2. A synchronous shaft 17 is rotatably mounted on the housing 1. A first bevel gear is mounted at the tail end of both the synchronous shaft 17 and the fan shaft 15. The two first bevel gears mesh with each other. A second belt is driven and mounted on the output shaft end of the motor 12. The synchronous shaft 17 is connected to the second belt drive.

[0037] After the motor 12 starts, the output shaft drives the drive gear to rotate at high speed. The drive gear meshes with the reduction gear 13. Since the radius of the reduction gear 13 is 5 times that of the drive gear, the reduction gear 13 rotates at a lower speed, which in turn drives the guide roller 11 connected to it to rotate slowly. The four guide rollers 11 synchronously drive the ring filter screen 2 to rotate smoothly. This solution solves the problem of unstable rotation and easy wear of the existing fan filter screen. The beneficial effect is that the ring filter screen 2 rotates at a stable low speed, which ensures continuous filtration of impurities during ventilation, greatly reduces the wear of the filter screen, extends the service life of the filter screen, reduces the frequency of filter screen replacement, reduces maintenance costs, and ensures long-term stable operation of the fan.

[0038] When the motor 12 is running, the output shaft drives the synchronous shaft 17 to rotate at high speed through the second belt. The first bevel gear at the tail end of the synchronous shaft 17 rotates accordingly. The first bevel gear at the tail end of the fan shaft 15, which meshes with the first bevel gear, drives the fan shaft 15 to rotate, causing the fan blades 16 mounted on the fan shaft 15 to rotate at high speed and generate a strong airflow. This solution solves the problems of insufficient ventilation power and unstable ventilation volume of traditional ventilators. The beneficial effect is that it can provide sufficient and stable ventilation volume for the grain warehouse, accelerate the air circulation in the grain warehouse, effectively inhibit grain mold and pest breeding, and ensure grain quality.

[0039] A convex shaft 3 is rotatably mounted inside the housing 1. A set of regularly distributed eccentric plates 4 are mounted on the convex shaft 3, which drive the periodic deformation of the ring filter 2. A tensioning frame 5 is slidably mounted on the housing 1. Two tensioning springs 6, which are limited by the housing 1, are mounted on the side of the tensioning frame 5. Tensioning rollers 7, which are in contact with the ring filter 2, are rotatably mounted on the inner wall of the tensioning frame 5. A rotating plate 8 is rotatably mounted at the tail end of the housing 1. A louvered frame 9 is connected to the rotating plate 8. A set of regularly distributed louvered plates 10 are rotatably mounted on the louvered frame 9. The multiple louvered plates 10 are linked by a first belt. The housing 1 is equipped with a linkage module that drives the rotating plate 8 to rotate and drives the louvered plates 10 to reciprocate and rotate. The convex shaft 3 is driven by the linkage module. The housing 1 is equipped with a monitoring component for real-time detection of the wind speed difference between the inner and outer sides of the ring filter 2 and feedback of blockage signals.

[0040] The linkage module includes a rotating shaft 18 rotatably mounted on the housing 1, a second bevel gear mounted at the tail end of the rotating shaft 18, a driven bevel gear ring fixedly mounted on the rotating plate 8 and connected to the second bevel gear, a third belt driven on the rotating shaft 18, and a cam shaft 3 and a guide roller 11 are both connected to the third belt.

[0041] The linkage module also includes a fixed bevel gear ring 19 installed at the rear of the chassis 1, a gear shaft 20 and an internal gear 21 rotatably mounted on the rotating plate 8, a third bevel gear connected to the fixed bevel gear ring 19 at the rear of the gear shaft 20, an incomplete gear 22 mounted on the gear shaft 20, the teeth of the incomplete gear 22 covering a 90-degree circumferential central angle, and the remaining circumferential area being toothless, an external gear 23 mounted on the 100-blade plate 10, both the incomplete gear 22 and the external gear 23 being connected to the internal gear 21, and the internal gear 21, the external gear 23 and the incomplete gear 22 having the same radius;

[0042] Because the eccentric plate 4 is attached to the inner surface of the ring filter 2, during the rotation, the eccentric plate 4 periodically squeezes the ring filter 2, causing the ring filter 2 to deform. This solution solves the problem of easy clogging and difficult cleaning of the existing fan filter. The beneficial effect is that there is no need to stop the machine for manual cleaning. The eccentric plate 4 automatically cleans the dust and impurities attached to the ring filter 2, ensuring smooth airflow of the filter, maintaining the high-efficiency working state of the fan, and improving ventilation efficiency.

[0043] Meanwhile, the eccentric plate 4 periodically squeezes the ring filter 2, thereby periodically changing the angle of the external airflow through the filter holes of the ring filter 2. By changing the angle of the airflow through the filter holes, the ventilation efficiency can be effectively improved on the one hand, and the clogging rate of external dirt in the filter holes can be effectively reduced on the other hand. At the same time, the ring filter 2 is periodically squeezed and the angle of its arrangement is repeatedly changed, which makes the ring filter 2 vibrate, thereby achieving self-cleaning of dirt adhering to the surface of the ring filter 2.

[0044] Under the elastic force of the tension spring 6, the tension frame 5 always applies pressure towards the ring filter screen 2, so that the tension roller 7 is tightly attached to the outer surface of the ring filter screen 2. When the ring filter screen 2 becomes loose during transmission, the tension spring 6 automatically adjusts the position of the tension frame 5 to maintain the tension of the tension roller 7 on the ring filter screen 2. This solution solves the problem that the ring filter screen 2 is prone to loosening during transmission, which leads to unstable transmission and reduced filtration effect. The beneficial effect is to ensure that the ring filter screen 2 is always in a taut state, operates stably, ensures the normal operation of the fan, and improves the reliability of the fan operation.

[0045] When the linkage module is working, the motor 12 drives the rotating shaft 18 to rotate through a series of transmission structures. The second bevel gear at the tail end of the rotating shaft 18 meshes with the driven bevel gear ring on the rotating plate 8, causing the rotating plate 8 to rotate, thereby changing the angle of the louver frame 9. At the same time, the rotating shaft 18 drives the cam shaft 3 to rotate through the third belt, realizing the cleaning of the filter screen. In addition, the rotating shaft 18 also causes the first belt between the louver plates 10 to move through other transmission structures, causing the louver plates 10 to reciprocate and rotate. This solution solves the problem that the air inlet angle of traditional ventilators is fixed and cannot flexibly adapt to the ventilation needs of different locations in the grain silo. The beneficial effect is that the air inlet direction and angle can be flexibly adjusted according to the actual ventilation conditions in the grain silo, improving the ventilation effect and better meeting the diverse ventilation requirements of grain storage.

[0046] Furthermore, by repeatedly changing the angle of the louver 10, the angle at which the airflow enters the ring filter 2 can be repeatedly changed, thereby improving the air intake efficiency of the ring filter 2.

[0047] The monitoring component includes two wind speed sensors 26 mounted on the chassis 1. One wind speed sensor 26 is located inside the ring filter 2, and the other wind speed sensor 26 is located outside the ring filter 2. A microcontroller 27 is mounted on the end face of the chassis 1. The data terminals of the two wind speed sensors 26 are connected to the microcontroller 27. The microcontroller 27 triggers a clearing warning signal based on the wind speed difference threshold between the two wind speed sensors 26.

[0048] A dust collection tray 28 is slidably installed on the inner wall of the casing 1, corresponding to the position below the ring filter 2.

[0049] Two wind speed sensors 26 located in the air inlet area inside the ring filter 2 and the air outlet area outside the ring filter 2 collect wind speed data in real time and transmit the data to the microcontroller 27 on the end face of the chassis 1. The microcontroller 27 continuously compares and analyzes the wind speed data transmitted by the two wind speed sensors 26 and calculates the wind speed difference. When the wind speed difference exceeds a preset threshold, the microcontroller 27 determines that the ring filter 2 is blocked and triggers a blockage warning signal. This solution solves the problem that existing ventilators cannot monitor the filter blockage in real time, which leads to the problem that the blockage is only discovered when it seriously affects the ventilation effect. The beneficial effect is that the staff can understand the blockage status of the ventilator filter in time and clean and maintain it before the blockage affects the ventilation efficiency, ensuring the continuous and efficient operation of the ventilator.

[0050] The ring filter 2 has a head-to-tail adhesive structure, which facilitates the replacement of the ring filter 2. The adhesive strength of the ring filter 2 is greater than the squeezing and tensioning strength of the eccentric plate 4 and the tensioning roller 7.

[0051] During the operation of the ventilation fan, the dust and impurities cleaned from the ring filter screen 2 fall into the dust collection tray 28 below under the action of gravity. When the dust collection tray 28 collects a lot of dust, the staff can use the slide to horizontally pull the dust collection tray 28 out of the machine box 1 for cleaning.

[0052] Working principle and usage process of this utility model:

[0053] When the track-mounted grain silo ventilation fan is in operation, the traveling platform 25 first slides along the guide rail frame 24 via rollers or sliders. The staff can manually push or use an external drive device to move the fan, thereby accurately moving the fan to the specific location in the grain silo that needs ventilation.

[0054] Inside the casing 1, the motor 12 starts, and its output shaft drives the drive gear to rotate at high speed. The drive gear meshes with the reduction gear 13. Because the radius of the reduction gear 13 is 5 times that of the drive gear, the reduction gear 13 rotates at a lower speed, which in turn drives the guide roller 11 connected to it to rotate slowly. The four guide rollers 11 synchronously drive the ring filter 2 to rotate smoothly. At the same time, the output shaft of the motor 12 drives the synchronous shaft 17 to rotate at high speed through the second belt. The first bevel gear at the end of the synchronous shaft 17 drives the fan shaft 15 to rotate, causing the fan blades 16 to rotate at high speed and generate a strong airflow.

[0055] During operation, the eccentric plate 4 on the cam shaft 3 rotates with the cam shaft 3, periodically squeezing and deforming the ring filter screen 2 to automatically clean the dust and impurities attached to the filter screen. Simultaneously, it changes the angle of external airflow through the filter holes, improving ventilation efficiency and reducing clogging rate, and also causes the ring filter screen 2 to vibrate for self-cleaning. The tension frame 5, under the action of the tension spring 6, maintains tension on the ring filter screen 2 through the tension roller 7. The motor 12 drives the rotating shaft 18 to rotate through the linkage module. The rotating shaft 18 drives the rotating plate 8 to rotate, changing the angle of the louver frame 9, and simultaneously drives the cam shaft 3 to rotate and clean the filter screen. It also causes the louver plate 10 to reciprocate and rotate through the transmission structure, changing the air intake direction and angle. The two wind speed sensors 26 of the monitoring component collect wind speed data inside and outside the ring filter 2 in real time and transmit it to the microcontroller 27. The microcontroller 27 determines whether the ring filter 2 is blocked based on the wind speed difference. If it exceeds the preset threshold, it triggers a blockage warning signal. The dust and impurities cleaned from the ring filter 2 fall into the dust collection tray 28 below. The staff can periodically take out the dust collection tray 28 for cleaning.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rail-mounted grain silo ventilator comprising a housing (1), characterized in that: The transmission module is provided in the cabinet (1), the ventilation module and the rotatable ring filter screen (2) are mounted on the transmission module, a convex shaft (3) is rotatably mounted in the cabinet (1), a plurality of eccentric plates (4) regularly distributed and driving the ring filter screen (2) to periodically deform are mounted on the convex shaft (3), a tensioning frame (5) is slidably mounted on the cabinet (1), two tensioning springs (6) are mounted on the side of the tensioning frame (5) and are limited by the cabinet (1), a tensioning roller (7) is rotatably mounted on the inner wall of the tensioning frame (5) and is in abutment with the ring filter screen (2), a rotating plate (8) is rotatably mounted at the tail end of the cabinet (1), a louver frame (9) is in communication with the rotating plate (8), a plurality of louver plates (10) regularly distributed are rotatably mounted on the louver frame (9), the plurality of louver plates (10) are linked by a first belt, the cabinet (1) is provided with a linkage module driving the rotating plate (8) to rotate and driving the louver plates (10) to reciprocatingly rotate, the convex shaft (3) is driven by the linkage module, and the cabinet (1) is provided with a monitoring assembly for detecting the wind speed difference between the inside and outside of the ring filter screen (2) in real time and feeding back a blocking signal.

2. A track-type grain aeration fan as claimed in claim 1, characterized in that: The transmission module includes a motor (12) mounted in the cabinet (1) and four guide rollers (11) rotatably mounted in the cabinet (1), the four guide rollers (11) are all in transmission connection with the ring filter screen (2), a driving gear is mounted at the output shaft end of the motor (12), a reduction gear (13) engaged with the driving gear is fixedly mounted on one of the guide rollers (11), and the radius of the reduction gear (13) is 3-5 times the radius of the driving gear.

3. A track-mounted grain aeration fan according to claim 2, characterized in that: The ventilation module includes a support (14) mounted in the cabinet (1), a fan shaft (15) is rotatably mounted on the inner wall of the support (14), a plurality of fan blades (16) arranged in a circumferential array are mounted on the fan shaft (15), the fan blades (16) are arranged on the inner side of the ring filter screen (2), a synchronous shaft (17) is rotatably mounted on the cabinet (1), first bevel gears are mounted at the tail ends of the synchronous shaft (17) and the fan shaft (15), the two first bevel gears are engaged with each other, a second belt is transmissionally connected between the output shaft end of the motor (12) and the synchronous shaft (17).

4. A track-type grain aeration fan as claimed in claim 2, characterized by: The linkage module includes a rotating shaft (18) rotatably mounted on the cabinet (1), a second bevel gear is mounted at the tail end of the rotating shaft (18), a driven bevel gear transmissionally connected with the second bevel gear is fixedly mounted on the rotating plate (8), a third belt is transmissionally connected between the convex shaft (3) and one of the guide rollers (11).

5. A track-mounted grain aeration fan according to claim 4, characterized in that: The linkage module further comprises a fixed cone gear (19) installed at the tail of the cabinet (1), a pinion shaft (20) and an internal gear (21) are rotatably installed on the rotating plate (8), a third bevel gear which is in transmission connection with the fixed cone gear (19) is installed at the tail of the pinion shaft (20), an incomplete gear (22) is installed on the pinion shaft (20), the tooth part of the incomplete gear (22) covers a 90-degree central angle in the circumferential direction, and the remaining circumferential area is a toothless structure, an external gear (23) is installed on the louver (10), the incomplete gear (22) and the external gear (23) are both in transmission connection with the internal gear (21), and the radii of the internal gear (21), the external gear (23) and the incomplete gear (22) are the same.

6. A rail mounted grain aeration fan as claimed in claim 1 wherein: Further comprising a guide rail frame (24), and a walking platform (25) which is in cooperation with the guide rail frame (24) is installed on the top surface of the cabinet (1).

7. A rail mounted grain aeration fan as claimed in claim 1 wherein: The monitoring assembly comprises two wind speed sensors (26) installed on the cabinet (1), one of the wind speed sensors (26) is arranged on the inner side of the ring filter screen (2), the other wind speed sensor (26) is arranged on the outer side of the ring filter screen (2), a single-chip microcomputer (27) is installed on the end surface of the cabinet (1), the data terminals of the two wind speed sensors (26) are all in data connection with the single-chip microcomputer (27), and the single-chip microcomputer (27) triggers a blockage clearing warning signal according to the wind speed difference threshold of the two wind speed sensors (26).

8. A rail mounted grain aeration fan as claimed in claim 1 wherein: A dust collecting drawer (28) is slidably installed on the inner wall of the cabinet (1) and at a position corresponding to the lower part of the ring filter screen (2).

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