A safe ash cleaning device for hot air duct in compound fertilizer production

Abstract

The utility model discloses a kind of for compound fertilizer production hot air duct safety ash removal device, including scraper blade, spring telescopic sleeve rod a, driving mechanism, scraper blade is respectively obliquely arranged at the top of spring telescopic sleeve rod a, the bottom of spring telescopic sleeve rod a is arranged in the front end side of driving mechanism;The driving mechanism further include rotating mechanism, crawling mechanism;The side of the scraper blade is provided with the plugboard arc of being convenient for making device put into pipeline.This utility model's function is to make device can be put into different pipe diameter air pipe and carry out cleaning operation, increase the applicability of device, reduce ash removal difficulty;Device is automatically cleaned in pipeline inside by the way of automatic propulsion, device whole is steadily propelled in pipeline inside, guarantee the cleaning effect to pipeline inner wall, need not extra setting traction mechanism, save time and labour;Reduce the time of operator contact pipeline inside tail gas and dust-containing gas, improve the security of device.

Description

Technical Field

[0001] This utility model belongs to the field of compound fertilizer production technology, and in particular relates to a safety ash removal device for hot air ducts in compound fertilizer production. Background Technology

[0002] In the compound fertilizer production process, during the drying process, high-temperature air comes into contact with the materials, generating waste gas containing organic matter and dust. If this waste gas is discharged directly without treatment, it will severely impact air quality. Therefore, the high-temperature exhaust gas needs to be introduced into an exhaust gas recirculation treatment system through an exhaust duct for treatment and dust removal before being discharged. After prolonged use, dust will adhere to the inner wall of the exhaust duct, and this dust needs to be cleaned regularly to ensure the effectiveness of the exhaust gas treatment.

[0003] The prior art, such as the Chinese patent (CN220049296U), discloses a soot pipe cleaning device, which includes: a pipe, and a cleaning device is installed inside the pipe. The cleaning device includes a first support frame and a second support frame, wherein the first support frame and the second support frame are fixedly connected by a connecting block. A connecting crossbar is provided in the middle of the first support frame, and a pull rope is fixedly installed in the middle of the connecting crossbar. A handle is provided at the right end of the pull rope.

[0004] This method has the following drawbacks: First, the device requires manual pushing to move inside the duct and scrape away dust. In practice, it's difficult to maintain a constant speed, leading to inconsistent cleaning performance. Setting up an automatic traction mechanism requires additional setup time, making it both time-consuming and labor-intensive. Second, different operating systems have varying loads and exhaust gas flow rates, resulting in different diameters for circular ducts. Setting up separate cleaning devices for each system incurs additional costs, and individual cleaning devices cannot adapt to different duct diameters, increasing the difficulty of duct cleaning. Third, the manual pushing of the device requires pulling it from the inspection port, causing a large amount of dust to escape during cleaning. Warm exhaust gas from the exhaust pipe also escapes with the dust, posing a health risk to the operator.

[0005] Therefore, this utility model provides a safety ash removal device for hot air ducts in compound fertilizer production. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model discloses a safety dust removal device for hot exhaust ducts in compound fertilizer production. This device can be inserted into ducts of varying diameters for cleaning operations, increasing its applicability and reducing the difficulty of dust removal. The device is automatically propelled within the duct for cleaning, ensuring a smooth and effective cleaning of the duct's inner wall. No additional traction mechanism is required, saving time and effort. Furthermore, it reduces the operator's exposure time to exhaust gases and dust-laden gases inside the duct, protecting the operator's health and improving the device's safety.

[0007] To achieve the above technical effects, this utility model provides a safety dust removal device for hot air ducts in compound fertilizer production, including scraper blades, spring telescopic sleeve a, and a drive mechanism. The scraper blades are respectively inclinedly arranged at the top end of the spring telescopic sleeve a, and the bottom end of the spring telescopic sleeve a is arranged on the front side of the drive mechanism. The drive mechanism also includes a rotating mechanism and a crawling mechanism. The bottom end of the spring telescopic sleeve a is provided with a rotating mechanism that drives the scraper blades to rotate for dust removal, and the rear side of the rotating mechanism is provided with a crawling mechanism that adapts to pipes of different specifications. The side of the scraper blades is provided with an insertion plate arc to facilitate the insertion of the device into the pipe.

[0008] Preferably, the rotating mechanism further includes a rotating shaft, a housing a, a drive motor, a power supply, and a wireless controller. The drive motor is located inside the housing a, the rotating shaft is located at the front end of the drive motor, and the rotating shaft is rotatably connected to the housing a. The front end of the rotating shaft is connected to the bottom end of the spring telescopic sleeve a. The power supply is located inside the housing a, and the wireless controller is located inside the housing a. The drive motor, the power supply, and the wireless controller are electrically connected, and the wireless controller is electrically connected to an external wireless remote control.

[0009] Preferably, the crawling mechanism further includes a support mechanism and a control mechanism, with the support mechanism located on the rear side of the outer casing a and the control mechanism located on the rear side of the support mechanism.

[0010] Preferably, the support mechanism further includes a mounting base a, a spring telescopic sleeve b, a support block a, and a rubber pad a. The mounting base a is located on the rear side of the outer casing, the bottom ends of the spring telescopic sleeve b are respectively located on the side of the mounting base a, the support block a is located on the top end of the spring telescopic sleeve b, and the rubber pads are respectively located on the top end of the support block a.

[0011] Preferably, the control mechanism further includes a telescopic electric cylinder a, a mounting base b, a pressure sensor, a support block b, a telescopic connecting rod, a rubber pad b, and a housing b. The telescopic electric cylinder a is located on the rear side of the mounting base a, and its output end is connected to the rear side of the mounting base a. The bottom end of the telescopic electric cylinder a is located on the mounting base b. The telescopic electric cylinders b are located on the rear side of the mounting base b. A pressure sensor is located between the bottom of the telescopic electric cylinder b and the mounting base b. The output end of the telescopic electric cylinder b is connected to the support block b. The front end of the support block b is connected to the telescopic connecting rod. The telescopic connecting rod is movably connected to the support block a. The rubber pad b is located on the top of the support block b. The housing b is located on the rear side of the mounting base b. The telescopic electric cylinder a, the telescopic electric cylinder b, the pressure sensor, the power supply, and the wireless controller are electrically connected.

[0012] Preferably, the telescopic link is connected to the support block a via a double-headed ball joint hinge.

[0013] Preferably, a handle is provided on the rear side of the outer casing b.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This device features retractable scraper blades, a support mechanism, and a crawling mechanism, allowing it to be inserted into ducts of varying diameters for cleaning operations. This increases the device's versatility and reduces the difficulty of dust removal. The rotating and crawling mechanisms enable automatic dust removal within the duct, ensuring smooth movement and effective cleaning of the duct walls. No additional traction mechanism is required, saving time and effort. Furthermore, the operator only needs to stand behind the inspection port at the beginning and end of the cleaning operation, minimizing the operator's exposure to exhaust gases and dust-laden gases inside the duct, thus protecting the operator's health and improving the device's safety. Attached Figure Description

[0016] Figure 1 This is an isometric side view of the front view of this utility model;

[0017] Figure 2 This is an isometric side view of the rear view of this utility model;

[0018] Figure 3 This is a front view of the present invention;

[0019] Figure 4 yes Figure 3 A sectional view of section a.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Scraper blade; 2. Spring telescopic sleeve a; 3. Rotating shaft; 4. Housing a; 5. Drive motor; 6. Mounting base a; 7. Spring telescopic sleeve b; 8. Support block a; 9. Rubber pad a; 10. Telescopic electric cylinder a; 11. Mounting base b; 12. Telescopic electric cylinder b; 13. Support block b; 14. Telescopic connecting rod; 15. Rubber pad b; 16. Housing b; 17. Double-headed ball joint; 18. Handle; 19. Insert plate arc. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] The prior art in this embodiment has the following problems: The inventors have found the following defects in the prior art: 1. The device needs to be manually pushed to move inside the pipe to scrape off the dust inside the pipe. In actual use, it is difficult to keep the device moving at a constant speed, resulting in unstable cleaning effect inside the pipe. Setting up an automatic traction mechanism requires additional setup time, which is time-consuming and labor-intensive. 2. In actual use, different working systems have different loads and different exhaust gas flow rates, resulting in different diameters of circular air ducts. Setting up separate dust removal equipment for different systems requires additional equipment costs. Separate dust removal equipment cannot adapt to the operating conditions of different duct diameters, which increases the difficulty of cleaning the air ducts. 3. The device needs to be manually pushed to move inside the pipe to scrape off the dust inside the pipe. The operator needs to pull the device at the inspection port. When cleaning the dust, a large amount of dust will escape from the inspection port. At the same time, the warm exhaust gas in the exhaust pipe will also escape with the dust. These harmful gases and dust can be easily inhaled by the operator, posing a threat to the operator's health. Example 1

[0024] like Figures 1 to 4 As shown:

[0025] Therefore, the inventor provides a safety dust removal device for hot air ducts in compound fertilizer production, including scraper blades 1, spring telescopic sleeve rod a2, and a drive mechanism. The scraper blades 1 are respectively inclinedly arranged at the top of the spring telescopic sleeve rod a2, and the bottom end of the spring telescopic sleeve rod a2 is arranged on the front side of the drive mechanism. The drive mechanism also includes a rotating mechanism and a crawling mechanism. The bottom end of the spring telescopic sleeve rod a2 is provided with a rotating mechanism that drives the scraper blades 1 to rotate and clean the dust. The rear side of the rotating mechanism is provided with a crawling mechanism that adapts to pipes of different specifications. The side of the scraper blades 1 is provided with an insertion plate arc 19 to facilitate the insertion of the device into the pipe.

[0026] Using the above scheme, when performing pipeline cleaning operations, the operator first inserts the end equipped with scraper blade 1 into the pipeline through the inspection port. The insert plate arc 19 on the side of scraper blade 1 first contacts the outer wall of the pipeline. After being squeezed, the spring telescopic sleeve rod a2 retracts inward, allowing scraper blade 1 to smoothly enter the pipeline. Then, the drive mechanism is set up, and the crawling mechanism drives the entire device to move and advance inside the pipeline. The rotating mechanism drives scraper blade 1 to rotate inside the pipeline, scraping off the dust on the inner wall of the pipeline. During the process, the spring telescopic rod a pushes scraper blade 1 to fit against the inner wall of the pipeline, ensuring that scraper blade 1 fits against the wall surface. At the same time, it pushes the scraped dust forward. Finally, the dust is discharged from the ash discharge port at the end of the pipeline, and the drive mechanism drives the device back to the inspection port for recycling. Example 2

[0027] like Figures 1 to 4 As shown:

[0028] Furthermore, the rotating mechanism also includes a rotating shaft 3, a housing a4, a drive motor 5, a power supply, and a wireless controller. The drive motor 5 is located inside the housing a4, the rotating shaft 3 is located at the front end of the drive motor 5, the rotating shaft 3 is rotatably connected to the housing a4, the front end of the rotating shaft 3 is connected to the bottom end of the spring telescopic sleeve a, the power supply (not shown in the figure) is located inside the housing a4, the wireless controller (not shown in the figure) is located inside the housing a4, the drive motor 5, the power supply and the wireless controller are electrically connected, and the wireless controller is electrically connected to an external wireless remote control (not shown in the figure).

[0029] Once the device is installed inside the pipeline, the operator takes position via wireless remote control. The wireless controller then activates the drive motor 5, which in turn rotates the shaft 3 inside the casing. The shaft 3 rotates the scraper blades 1 on the spring telescopic sleeve a2, scraping off the dust adhering to the inner wall of the pipeline. Driven by the crawling mechanism, the scraper blades 1 continuously advance forward, eventually cleaning the dust off the inner wall of the pipeline. During this process, the inclined scraper blades 1 continuously push the scraped dust forward and gather it, while simultaneously generating airflow to push the falling dust forward, reducing the amount of dust that diffuses behind the scraper blades 1 and improving the service life of the device. Example 3

[0030] like Figures 1 to 4 As shown:

[0031] Furthermore, the crawling mechanism also includes a support mechanism and a control mechanism. The support mechanism is located on the rear side of the housing a4, and the control mechanism is located on the rear side of the support mechanism.

[0032] Furthermore, the support mechanism also includes a mounting base a6, a spring telescopic sleeve b7, a support block a8, and a rubber pad a9. The mounting base a6 is located on the rear side of the outer shell, the bottom end of the spring telescopic sleeve b7 is located on the side of the mounting base a6, the support block a8 is located on the top end of the spring telescopic sleeve b7, and the rubber pad is located on the top end of the support block a9.

[0033] Furthermore, the control mechanism also includes a telescopic electric cylinder a10, a mounting base b11, a telescopic electric cylinder b12, a pressure sensor, a support block b13, a telescopic connecting rod 14, a rubber pad b15, and a housing b16. The telescopic electric cylinder a10 is located on the rear side of the mounting base a6, and its output end is connected to the rear side of the mounting base a6. The bottom end of the telescopic electric cylinder a10 is located on the mounting base b11. The telescopic electric cylinder b12 is located on the rear side of the mounting base b11. A pressure sensor (not shown in the figure) is located between the bottom of the telescopic electric cylinder b12 and the mounting base b11. The output end of the telescopic electric cylinder b12 is connected to the support block b13. The front end of the support block b13 is connected to the telescopic connecting rod 14. The telescopic connecting rod 14 is movably connected to the support block a8. The rubber pad b15 is located on the top of the support block b13. The housing b16 is located on the rear side of the mounting base b11. The telescopic electric cylinders a10, b12, and pressure sensor are electrically connected to the power supply and the wireless controller.

[0034] Furthermore, the telescopic link 14 and the support block a8 are hinged together by a double-headed ball joint 17;

[0035] Furthermore, a handle 18 is provided on the rear side of the outer casing b16;

[0036] Before the device is installed, both telescopic cylinders a10 and b12 are in the retracted state. Telescopic cylinder a10 drives telescopic connecting rod 14 to retract, and the distance between support block a8 and support block b13 is at its minimum. Telescopic cylinder b12 drives support block b13 to retract inward. Support block b13 drives support block a8 to pull spring telescopic sleeve rod b7 to retract through telescopic connecting rod 14. The outer diameters of support block a8 and support block b13 are contracted to their minimum. At this time, the device is in the storage state.

[0037] After the operator inserts the scraper blade 1 into the duct by holding the handle 18, the operator executes the unfolding action through the wireless remote control device. The telescopic cylinder b12 extends, causing the support block b13 and support block a8 to unfold outward and press against the inner wall of the duct. At this time, the support block a8 receives the outward pushing force of the spring telescopic sleeve b7, and the support block b13 receives the outward pushing force of the telescopic cylinder b12. Both the support block a8 and the support block b13 play the role of supporting the entire device. The rubber pads a9 and b15 work together to buffer and increase friction to prevent slippage. After the support block b13 presses against the outer wall of the duct, the pressure feedback is detected by the pressure sensor at the bottom of the telescopic cylinder b12 and transmitted to the wireless controller. At the same time, the fixed signal is fed back to the wireless remote control indicator light through the wireless controller. Then the telescopic cylinder b12 automatically stops, and the device is fixed inside the duct. In this way, by setting the retractable scraper blade 1, the support mechanism and the crawling mechanism, the device can be put into ducts of different diameters for cleaning operations, which increases the applicability of the device and reduces the difficulty of dust removal.

[0038] After the device is in place, the operator observes the indicator lights on the wireless remote control to confirm deployment. The cleaning mode is then activated, and the wireless controller starts the drive motor 5. Drive motor 5 drives the scraper blades 1 to scrape and clean the inner wall of the pipe. During the process, when the set scraping time is reached at the current position, the telescopic cylinder a10 extends, using support block b13 as a fixed support point to push the front support mechanism forward, thus moving the cleaning range of the scraper blades 1 forward. During this process, the pressure sensor controls the support pressure of support block b13 driven by telescopic cylinder b12 to be greater than the support pressure of support block a8 driven by spring telescopic rod b. After telescopic cylinder a10 advances, telescopic cylinder b12 retracts, causing support block b13 to disengage from the device. Support block a8, due to its hinged connection with telescopic link 14, can offset from support block b13 within a certain range. Simultaneously, it is pushed outward by spring telescopic link b7, providing temporary support for the device. Afterward, telescopic cylinder a10... The support block b13 retracts, and the telescopic electric cylinder b12 retracts and fixes the support block b13. The entire device crawls and moves inside the pipe according to the same operating principle at the set time. During the process, the operator monitors the position of the device inside the pipe in real time by sound. After the device crawls to the end of the pipe, the operator controls the drive motor 5 to stop via wireless remote control. The control mechanism moves in the opposite direction in the same way, so that the device exits along the original path inside the pipe to the inspection port. Then, the telescopic electric cylinders a10 and b12 are controlled to retract to the storage state. The operator holds the handle 18 and pulls the device out of the pipe to complete the cleaning operation. In this way, the device is automatically pushed and cleaned inside the pipe. The entire device moves smoothly inside the pipe, ensuring the cleaning effect on the inner wall of the pipe. There is no need to set up an additional traction mechanism, saving time and effort. At the same time, the operator only needs to stand behind the inspection port at the beginning and end of the cleaning operation, which reduces the time the operator is exposed to exhaust gas and dust-containing gas inside the pipe, ensuring the operator's health and improving the safety of the device.

[0039] During the process, the friction on rubber pad a9 is greater than that on rubber pad b15. Therefore, rubber pad a9 can be made of wear-resistant material, or rollers can be installed under support block a8 to reduce wear.

[0040] In summary, this device features retractable scraper blades, a support mechanism, and a crawling mechanism, allowing it to be inserted into ducts of varying diameters for cleaning operations. This increases the device's applicability and reduces the difficulty of dust removal. The rotating and crawling mechanisms enable automatic dust removal within the duct via automatic propulsion. The device moves smoothly inside the duct, ensuring effective cleaning of the duct's inner wall without the need for an additional traction mechanism, saving time and effort. Furthermore, the operator only needs to stand behind the inspection port at the beginning and end of the cleaning operation, reducing the operator's exposure time to exhaust gases and dust-laden gases inside the duct, ensuring the operator's health, and improving the device's safety.

[0041] The working principle of this utility model:

[0042] Before the device is set up, both telescopic cylinders a10 and b12 are in the retracted state. Telescopic cylinder a10 drives telescopic connecting rod 14 to retract, and the distance between support block a8 and support block b13 is at its minimum. Telescopic cylinder b12 drives support block b13 to retract inward. Support block b13 drives support block a8 to pull spring telescopic sleeve rod b7 to retract through telescopic connecting rod 14. The outer diameters of support block a8 and support block b13 are contracted to their minimum. At this time, the device is in the storage state.

[0043] The operator first holds the handle 18 and inserts the end with the scraper blade 1 into the pipe through the inspection port. The insert plate arc 19 set on the side of the scraper blade 1 first contacts the outer wall of the pipe. After being squeezed, the spring telescopic sleeve a2 retracts inward, allowing the scraper blade 1 to smoothly enter the pipe.

[0044] The operator then uses a wireless remote control device to perform the deployment action. The telescopic electric cylinders b12 extend, causing support blocks b13 and a8 to extend outward and press against the inner wall of the duct. At this time, support block a8 receives an outward pushing force from the spring telescopic sleeve b7, and support block b13 receives an outward pushing force from the telescopic electric cylinder b12. Both support blocks a8 and b13 support the entire device. Rubber pads a9 and b15 work together to buffer and increase friction to prevent slippage. After support block b13 presses against the outer wall of the duct, the pressure feedback is detected by the pressure sensor at the bottom of the telescopic electric cylinder b12 and transmitted to the wireless controller. At the same time, the fixed signal is fed back to the wireless remote control indicator light through the wireless controller. Then, the telescopic electric cylinder b12 automatically stops, and the device is fixed inside the duct. In this way, by setting retractable scraper blades 1, support mechanism and crawling mechanism, the device can be put into ducts of different diameters for cleaning operations, increasing the applicability of the device and reducing the difficulty of dust removal.

[0045] After the device is in place, the operator observes that the device has been deployed according to the indicator lights on the wireless remote control, starts the cleaning mode, and drives the drive motor 5 to rotate the rotating shaft 3 inside the housing. The rotating shaft 3 drives the scraper blade 1 on the spring telescopic sleeve a2 to rotate, scraping off the dust adhering to the inner wall of the pipe. Then, driven by the crawling mechanism, it continues to move forward, eventually cleaning off the dust on the inner wall of the pipe. During the process, the inclined scraper blade 1 continuously pushes the scraped dust forward and gathers it, while generating airflow to push the falling dust forward, reducing the dust that spreads behind the scraper blade 1 and improving the service life of the device.

[0046] After activating the cleaning mode, the wireless controller starts the drive motor 5, which drives the scraper blade 1 to scrape and clean the inner wall of the pipe. During the process, when the set scraping time is reached at the current position, the telescopic electric cylinder a10 extends, using the support block b13 as a fixed support point, and pushes the front support mechanism forward, causing the cleaning range of the scraper blade 1 to move forward. During the process, the pressure sensor controls the support pressure of the support block b13 driven by the telescopic electric cylinder b12 to be greater than the support pressure of the support block a8 driven by the spring telescopic rod b. After the telescopic electric cylinder a10 has advanced, the telescopic electric cylinder b12 retracts, causing the support block b13 to disengage from the device. Because the support block a8 is hinged to the telescopic connecting rod 14, there can be a certain range of offset between the support block a8 and the support block b13. At the same time, it is pushed outward by the spring telescopic sleeve rod b7, and the support block a8 temporarily provides support for the device. Afterward, the telescopic electric cylinder a10 drives the support block b13 to retract, and the telescopic electric cylinder b10... 2. The support block b13 is re-unfolded and fixed. The entire device crawls and moves inside the pipe according to the set time and the same operating principle. During the process, the operator monitors the position of the device inside the pipe in real time according to the sound. After the device crawls to the end of the pipe, the operator controls the drive motor 5 to stop via wireless remote control. The control mechanism moves in the opposite direction in the same way, so that the device exits the pipe along the original path to the inspection port. Then, the telescopic cylinders a10 and b12 are controlled to retract to the storage state. The operator holds the handle 18 and pulls the device out of the pipe to complete the cleaning operation. In this way, the device is automatically pushed and cleaned inside the pipe. The device moves smoothly inside the pipe, ensuring the cleaning effect on the inner wall of the pipe. No additional traction mechanism is required, saving time and effort. At the same time, the operator only needs to stand behind the inspection port at the beginning and end of the cleaning operation, reducing the time the operator is exposed to exhaust gas and dust-containing gas inside the pipe, ensuring the operator's health and improving the safety of the device.

[0047] This concludes the description of the working principle of the device.

[0048] 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.

[0049] 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 safety dust removal device for hot air ducts in compound fertilizer production, comprising scraper blades (1), spring telescopic sleeve a (2), and a drive mechanism, wherein the scraper blades (1) are respectively inclinedly disposed at the top end of the spring telescopic sleeve a (2), and the bottom end of the spring telescopic sleeve a (2) is disposed on the front side of the drive mechanism, characterized in that: The drive mechanism also includes a rotating mechanism and a crawling mechanism. The bottom end of the spring telescopic sleeve a (2) is provided with a rotating mechanism that drives the scraper blade (1) to rotate and clean the dust. The rear side of the rotating mechanism is provided with a crawling mechanism that adapts to pipes of different specifications. The side of the scraper blade (1) is provided with an insert plate arc (19) that facilitates the insertion of the device into the pipe.

2. The safety dust removal device for hot exhaust pipes in compound fertilizer production according to claim 1, characterized in that: The rotating mechanism also includes a rotating shaft (3), a housing a (4), a drive motor (5), a power supply, and a wireless controller. The drive motor (5) is located inside the housing a (4), the rotating shaft (3) is located at the front end of the drive motor (5), the rotating shaft (3) is rotatably connected to the housing a (4), the front end of the rotating shaft (3) is connected to the bottom end of the spring telescopic sleeve a, the power supply is located inside the housing a (4), the wireless controller is located inside the housing a (4), the drive motor (5), the power supply and the wireless controller are electrically connected, and the wireless controller is electrically connected to an external wireless remote control.

3. The safety dust removal device for hot air ducts in compound fertilizer production according to claim 1, characterized in that: The crawling mechanism also includes a support mechanism and a control mechanism. The support mechanism is located on the rear side of the outer shell a (4), and the control mechanism is located on the rear side of the support mechanism.

4. A safety dust removal device for hot air ducts in compound fertilizer production according to claim 3, characterized in that: The support mechanism further includes a mounting base a (6), a spring telescopic sleeve b (7), a support block a (8), and a rubber pad a (9). The mounting base a (6) is located on the rear side of the outer shell, the bottom end of the spring telescopic sleeve b (7) is located on the side of the mounting base a (6), the support block a (8) is located on the top end of the spring telescopic sleeve b (7), and the rubber pad is located on the top end of the support block a (8).

5. A safety dust removal device for hot air ducts in compound fertilizer production according to claim 3, characterized in that: The control mechanism further includes a telescopic electric cylinder a (10), a mounting base b (11), a telescopic electric cylinder b (12), a pressure sensor, a support block b (13), a telescopic connecting rod (14), a rubber pad b (15), and a housing b (16). The telescopic electric cylinder a (10) is located on the rear side of the mounting base a (6), and the output end of the telescopic electric cylinder a (10) is connected to the rear side of the mounting base a (6). The bottom end of the telescopic electric cylinder a (10) is located on the mounting base b (11), and the telescopic electric cylinders b (12) are respectively located on the rear side of the mounting base b (11). A pressure sensor is installed between the bottom of cylinder b (12) and the mounting base b (11). The output end of the telescopic electric cylinder b (12) is connected to the support block b (13). The front end of the support block b (13) is connected to the telescopic connecting rod (14). The telescopic connecting rod (14) is movably connected to the support block a (8). The rubber pad b (15) is installed on the top of the support block b (13). The outer shell b (16) is installed on the rear side of the mounting base b (11). The telescopic electric cylinder a (10), the telescopic electric cylinder b (12), the pressure sensor, the power supply, and the wireless controller are connected by telecommunications.

6. A safety dust removal device for hot air ducts in compound fertilizer production according to claim 5, characterized in that: The telescopic link (14) and the support block a (8) are connected by a double-headed ball joint (17) hinge.

7. A safety dust removal device for hot air ducts in compound fertilizer production according to claim 5, characterized in that: A handle (18) is provided on the rear side of the outer casing b (16).

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