Coal bed gas vertical well double-layer partial pressure commingling production method and device

Abstract

The invention relates to the technical field of coal seam mining, in particular to a coal seam gas vertical well double-layer partial pressure commingling mining method and device. The device comprises a device body, a self-cleaning mechanism is arranged in the device body, the self-cleaning mechanism comprises a filtering part, a first rotating shaft, a rotating part, a scraping and washing part and a first wind wheel, and the filtering part is fixedly connected into the device body; the first rotating shafts are rotationally connected into the device body and the filtering part, the rotating part is fixedly connected to one ends of the first rotating shafts, the scraping part is fixedly connected to the right end of the rotating part, the first wind wheel is fixedly connected to the circumferential surface of the first rotating shafts, and the first wind wheel is arranged in the device body. According to the invention, automatic collection of the carbon powder is realized, blockage of the filter element is effectively prevented, and meanwhile, filtered clean gas is introduced back and is used for driving the second wind power assembly, so that the carbon powder collected by the cleaning mechanism is discharged, and cooperative operation of self-cleaning and resource utilization is realized.

Description

Technical Field

[0001] This invention relates to the field of coal seam extraction technology, specifically to a method and apparatus for dual-layer pressure-diverging and combined extraction of coalbed methane in a vertical well. Background Technology

[0002] Among existing technologies, the coalbed methane vertical well dual-layer pressure-separated co-production method and its device is a highly efficient development technology developed for coalbed methane reservoirs containing multiple coal seams, especially two sets of mineable coal seams, upper and lower. Its core objective is to independently fracture and separate the pressure of the upper and lower coal seams in a single vertical well, and then achieve joint gas production and co-production through a special downhole tubing structure, thereby effectively avoiding inter-layer interference and increasing single-well production.

[0003] The authorized publication number "CN105649578B" describes a "Method and Apparatus for Dual-Layer Pressure-Dividing Co-production of Coalbed Methane in Vertical Wells." This invention relates to a method and apparatus for dual-layer pressure-dividing co-production of coalbed methane in vertical wells. The method involves installing a pipeline within the well, containing three isolated channels: a first channel, a second channel, and a third channel. The sidewalls of the first and second channels are connected to two coal seams, respectively. This allows gas from the two coal seams to be discharged to the wellhead through the first and second channels, while liquid from the two coal seams flows to the bottom of the first and second channels, achieving gas-liquid separation within the well. One-way valves are installed between the first and second channels, and between the second and third channels, to prevent liquid accumulation at the bottom of the well while simultaneously pumping liquid from both coal seams out of the well. This invention utilizes a single well to simultaneously produce and pump gas and water from the upper and lower coal seams, achieving gas-liquid separation at the well bottom. This ensures that "gas follows the gas path, and water follows the water path," separating the pressure systems of the two coal seams, reducing inter-layer interference during development, and effectively increasing gas production.

[0004] The aforementioned patent utilizes a single well to simultaneously extract and pump gas and water from the upper and lower coal seams, achieving gas-liquid separation at the bottom of the well, thus separating gas and water. However, during long-term operation of the equipment, coalbed methane extraction is often accompanied by the production of coal powder, which can easily cause blockage of the one-way valve. Once blockage occurs, it will disrupt the liquid-gas separation mechanism, resulting in ineffective gas-liquid separation. This not only weakens the protection of low-pressure coal seams but also obstructs the upward flow of gas, reduces drainage efficiency, and may further affect drainage efficiency and cause problems such as wellbore liquid accumulation. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a method and apparatus for dual-layer pressure-separated coalbed methane production in vertical wells. By utilizing the airflow within the intake pipe to drive a cleaning mechanism, it achieves automatic collection of carbon powder, effectively preventing filter element blockage. This effectively solves the problem in existing technologies where coalbed methane extraction is often accompanied by coal powder production, which easily causes one-way valve blockage. Once blockage occurs, it will disrupt the liquid-gas separation mechanism, resulting in ineffective gas-liquid separation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a coalbed methane vertical well dual-layer pressure-diverging and combined production device, comprising a device body, wherein a self-cleaning mechanism is provided inside the device body, the self-cleaning mechanism comprising a filter element, a first rotating shaft, a rotating element, a scraping element, and a first impeller, the filter element being fixedly connected inside the device body, the first rotating shaft being rotatably connected to both the device body and the filter element, the rotating element being fixedly connected to one end of the first rotating shaft, the scraping element being fixedly connected to the right end of the rotating element, and the first impeller being fixedly connected to the circumferential surface of the first rotating shaft, the first impeller being disposed inside the device body.

[0008] Furthermore, two elastic sealing elements are fixedly connected to the inner walls of both sides of the scraping component. The two elastic sealing elements are made of elastic material. An air outlet is provided through the rotating component, and a sewage outlet is provided through one end of the scraping component.

[0009] Furthermore, a fixing member is fixedly connected inside the main body of the device, and a blowing member is fixedly connected to the lower end of the fixing member.

[0010] Furthermore, a second rotating shaft is rotatably connected inside the blowing component, and a fan is fixedly connected to the circumferential surface of the second rotating shaft. The rotating component has a hollow cavity structure.

[0011] Furthermore, an air duct is fixedly connected inside the main body of the device, and a fitting component is fixedly connected to the lower end of the air duct. A second impeller is rotatably connected inside the fitting component, and a second impeller is fixedly connected to the circumferential surface of the second rotating shaft.

[0012] Furthermore, a squeezing member is fixedly connected to the front end of the scraping member, a support member is fixedly connected to the right end of the main body of the device, a retracting member is slidably connected inside the support member, a first delay switch is fixedly connected to the right end of the retracting member, a mounting platform is provided inside the support member, a second delay switch is fixedly connected to the left end of the mounting platform, a spring is provided inside the support member, two retracting members and a mounting platform are fixedly connected to the two ends of the spring respectively, a locking member is slidably connected to the left end of the retracting member, a locking member is slidably connected inside the squeezing member, a valve control member is fixedly connected to the right end of the support member, and a discharge pipe is fixedly connected to the upper end of the support member.

[0013] Furthermore, a first external connector is fixedly connected to the front end of the main body of the device, and a second external connector is fixedly connected to the right end of the main body of the device.

[0014] A method for dual-layer pressure-divide and combined production of coalbed methane in a vertical well includes the following steps:

[0015] S1. After the coalbed methane fluid containing coal powder enters the main body of the device from the first external component, it first undergoes preliminary filtration through the filter element. The airflow drives the first impeller to rotate, and the first impeller drives the first rotating shaft to rotate, which in turn drives the rotating component and the scraping component fixedly connected to it to move synchronously. During the rotation, the scraping component scrapes the surface of the filter element and scrapes the attached carbon powder into its interior.

[0016] S2. During the scraping process, the carbon powder is squeezed to open the elastic seal and enter the inner cavity of the scraper. The triangular structure of the elastic seal ensures that the internal gas cannot leak out. When the scraper rotates to the dust discharge position, the front end of the extrusion piece contacts the retractor in the support piece, pushing the retractor to slide inward and compress the spring. This causes the first delay switch and the second delay switch to press and trigger each other. After the first delay switch is triggered, the locking piece pops out and embeds into the extrusion piece to lock it, so that the scraper stops swinging. At this time, the drain port is aligned with the support piece. At the same time, the second delay switch triggers the valve control piece to open the valve in the support piece. Meanwhile, the filtered clean gas is introduced into the mating part through the air duct, which drives the second impeller to rotate. The second impeller drives the second rotating shaft and the fan to rotate. The airflow generated enters the interior of the scraper through the cavity and air outlet of the rotating part, blowing the collected carbon powder out from the drain port and out through the discharge pipe.

[0017] S3. After the set delay time, the first delay switch and the second delay switch automatically reset, the locking part retracts to unlock the squeezing part, the spring pushes the retracting part to reset, the valve control part closes the valve, and the scraping part resumes rotation to continue cleaning, completing one self-cleaning cycle.

[0018] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0019] I. This invention utilizes the airflow within the intake pipe to drive a cleaning mechanism, thereby achieving automatic collection of toner and effectively preventing clogging of the filter element. Simultaneously, the filtered clean gas is drawn back and used to drive a second wind power component, thereby discharging the toner collected by the cleaning mechanism, achieving synergistic operation of self-cleaning and resource utilization.

[0020] 2. The scraper component moves with the rotating component to scrape the surface of the filter element. During the scraping process, the coal dust is squeezed and the elastic seal is deformed outward and opened, thus entering the scraper component for collection. When the airflow inside the rotating component enters the scraper component through the air outlet and forms a positive pressure, the triangular structure of the elastic seal has its tip facing inward. Under the action of wind pressure, its two sides are more tightly sealed and cannot be blown open, thus preventing internal gas and dust from leaking from both sides. Only dust is allowed to be discharged directionally from the drain port under the push of the wind. This structure achieves the function of unidirectional dust inlet and bidirectional sealing through the elastic seal, ensuring that the scraper component effectively collects carbon dust while maintaining internal airtightness, ensuring that the backflushing dust removal process is efficient and reliable. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a top perspective view of the present invention;

[0023] Figure 2 This is a first sectional perspective view of the present invention;

[0024] Figure 3 This is a second sectional perspective view of the present invention;

[0025] Figure 4 This is a side perspective view of the present invention;

[0026] Figure 5 This is a third sectional perspective view of the present invention;

[0027] Figure 6 For the present invention Figure 5 A magnified view of a portion of the image;

[0028] Figure 7 This is the exploded three-dimensional representation of the present invention.

[0029] Reference numerals in the attached drawings: 1. Main body of the device; 2. Filter element; 3. First rotating shaft; 4. Rotating element; 5. Scraping element; 6. First impeller; 7. Elastic sealing element; 8. Air outlet; 9. Drain outlet; 10. Fixing element; 11. Blowing element; 12. Second rotating shaft; 13. Fan; 1401. Air duct; 14. Fitting element; 15. Second impeller; 16. Extrusion element; 17. Support element; 18. Retraction element; 19. First delay switch; 20. Mounting platform; 21. Second delay switch; 22. Spring; 23. Locking element; 24. Valve control element; 25. Discharge pipe; 26. First external connector; 27. Second external connector. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] The present invention will be further described below with reference to embodiments.

[0032] See attached document Figure 1 - Figure 7 A coalbed methane vertical well dual-layer pressure-diverging and combined production device includes a device body 1. The device body 1 is equipped with a self-cleaning mechanism, which includes a filter element 2, a first rotating shaft 3, a rotating element 4, a scraping element 5, and a first impeller 6. The filter element 2 is fixedly connected to the device body 1. The first rotating shaft 3 is rotatably connected to both the device body 1 and the filter element 2. The rotating element 4 is fixedly connected to one end of the first rotating shaft 3. The scraping element 5 is fixedly connected to the right end of the rotating element 4. The first impeller 6 is fixedly connected to the circumferential surface of the first rotating shaft 3 and is located inside the device body 1.

[0033] In a specific embodiment of the present invention, when the gas-containing fluid enters the main body 1 of the device, the airflow drives the first impeller 6 to rotate. The first impeller 6 drives the first rotating shaft 3, which is fixed coaxially with it, to rotate synchronously. The rotation of the first rotating shaft 3 drives the rotating component 4 to move around the axis, thereby driving the scraping component 5, which is fixed to the right end of the rotating component 4, to perform circumferential or reciprocating scraping motion along the surface of the filter element 2, so as to continuously remove the coal powder or impurities accumulated on the surface of the filter element 2. This linkage structure uses the energy of the airflow itself to drive the cleaning action without the need for an additional power source, so that the filter element 2 remains permeable during operation, prevents blockage, and ensures the stable operation of the gas-liquid separation channel.

[0034] For details, please refer to the attached document. Figure 1 - Figure 7Two elastic sealing elements 7 are fixedly connected to the inner walls of both sides of the scraping component 5. The two elastic sealing elements 7 are made of elastic material. An air outlet 8 is opened through the rotating component 4. A sewage outlet 9 is opened through one end of the scraping component 5.

[0035] In this embodiment: the scraper 5 moves with the rotating part 4 to scrape the surface of the filter 2. During the scraping process, the coal powder is squeezed and the elastic seal 7 deforms and opens outward, thus entering the scraper 5 for collection. When the airflow in the rotating part 4 enters the scraper 5 through the air outlet 8 and forms a positive pressure wind force, because the triangular structure of the elastic seal 7 has its tip facing inward, its two sides are more tightly sealed under the wind pressure and cannot be blown open, thus preventing the internal gas and dust from leaking from both sides. Only the dust is allowed to be discharged directionally from the drain outlet 9 under the push of the wind force. This structure realizes the function of unidirectional powder intake and bidirectional sealing through the elastic seal 7, ensuring that the scraper 5 effectively collects carbon powder while maintaining internal airtightness, and ensuring that the back-blowing dust removal process is efficient and reliable.

[0036] For details, please refer to the attached document. Figure 1 - Figure 7 A fixing member 10 is fixedly connected inside the main body 1 of the device, and a blowing member 11 is fixedly connected to the lower end of the fixing member 10.

[0037] In this embodiment, the fixing member 10 serves as a support structure to stably install the blowing member 11 at a specific position inside the main body 1 of the device, so that the blowing member 11 can be aligned with the target area. Under the action of airflow or external power, the blowing member 11 generates directional airflow to assist in removing accumulated dust.

[0038] For details, please refer to the attached document. Figure 1 - Figure 7 The blowing component 11 is rotatably connected to a second rotating shaft 12, and a fan 13 is fixedly connected to the circumferential surface of the second rotating shaft 12. The rotating component 4 has a hollow structure.

[0039] In this embodiment: when the airflow enters the blowing member 11 from the cavity of the rotating member 4 through the air outlet 8, it drives the fan 13 to rotate. The fan 13 drives the second rotating shaft 12, which is fixedly connected to it, to rotate synchronously, thereby enhancing the airflow disturbance or forming directional wind force to assist in the discharge of dust collected in the scraping member 5.

[0040] For details, please refer to the attached document. Figure 1 - Figure 7 The main body 1 of the device is fixedly connected to an air duct 1401. The lower end of the air duct 1401 is fixedly connected to a fitting part 14. The fitting part 14 is rotatably connected to a second impeller 15. The circumferential surface of the second rotating shaft 12 is fixedly connected to the second impeller 15.

[0041] In this embodiment: the filtered airflow is introduced into the mating component 14 through the air duct 1401, driving the second impeller 15 to rotate. The second impeller 15 drives the second rotating shaft 12, which is coaxially fixed with it, to rotate synchronously, thereby driving the fan 13 to generate a purging airflow. This linkage structure uses the filtered gas as a power source, guiding the airflow to act on the second impeller 15 through the air duct 1401 and the mating component 14, realizing energy recovery and self-driven dust removal, avoiding additional energy consumption and ensuring the effective removal of dust from the scraper 5. At the same time, the mating component 14 and the blowing component 11 are interconnected to ensure the airflow of the blowing component 11. Two airflow ports are opened through the connection between the mating component 14 and the blowing component 11, such as... Figure 5 As shown.

[0042] For details, please refer to the attached document. Figure 1 - Figure 7 The front end of the scraping component 5 is fixedly connected to the squeezing component 16. The right end of the main body 1 is fixedly connected to the support component 17. The support component 17 is slidably connected to the retraction component 18. The right end of the retraction component 18 is fixedly connected to the first delay switch 19. The support component 17 is provided with a mounting platform 20. The left end of the mounting platform 20 is fixedly connected to the second delay switch 21. The support component 17 is provided with a spring 22. The two ends of the spring 22 are fixedly connected to the two retraction components 18 and the mounting platform 20 respectively. The left end of the retraction component 18 is slidably connected to the locking component 23. The squeezing component 16 is slidably connected to the locking component 23. The right end of the support component 17 is fixedly connected to the valve control component 24. The upper end of the support component 17 is fixedly connected to the discharge pipe 25.

[0043] In this embodiment: when the scraper 5 rotates to the dust discharge position, it drives the extruder 16 to swing together. The extruder 16 contacts the circular surface of the retractor 18 and pushes it to slide into the support 17, so that the retractor 18 is engaged with the extruder 16 to complete the mechanical adaptation. During this process, the spring 22 is compressed and stores energy. The retractor 18 continues to move, causing the first delay switch 19 and the second delay switch 21 to press and trigger each other. After the first delay switch 19 is triggered, it controls the locking member 23 to pop out and embed into the extruder 16 to lock, so that the scraper 5 stops swinging and keeps the drain port 9 aligned with the support 17. Simultaneously, the second delay switch 21 triggers the valve control component 24 to open the valve inside the support component 17, allowing the carbon powder collected in the scraper component 5 to be discharged through the discharge pipe 25. Since the first delay switch 19 and the second delay switch 21 have a delay reset function, they automatically rebound after a set time, unlocking the locking component 23 and closing the valve. The scraper component 5 resumes its rotating cleaning state. This linkage mechanism achieves automatic start and stop of the dust removal process through mechanical triggering, delay control and spring 22 reset, ensuring that the channel is aligned and sealed reliably during dust removal, while avoiding continuous opening that could cause gas leakage or cleaning interruption.

[0044] For details, please refer to the attached document. Figure 1 - Figure 7The front end of the device body 1 is fixedly connected to a first external component 26, and the right end of the device body 1 is fixedly connected to a second external component 27.

[0045] In this embodiment, the first external connector 26 and the second external connector 27 serve as interfaces between the main body 1 of the device and external pipelines or equipment, respectively.

[0046] The working principle and usage process of this invention: After the coalbed methane fluid containing coal powder enters the main body 1 of the device through the first external connector 26, it first undergoes preliminary filtration through the filter element 2. The airflow drives the first impeller 6 to rotate, and the first impeller 6 drives the first rotating shaft 3 to rotate, thereby driving the rotating element 4 and the scraping element 5 fixedly connected to it to move synchronously. During the rotation, the scraping element 5 scrapes the surface of the filter element 2, scraping the attached carbon powder into its interior. During the scraping process, the carbon powder is squeezed to open the elastic sealing element 7 and enter the inner cavity of the scraping element 5. The triangular structure of component 7 ensures that internal gas cannot leak out. When the scraper component 5 rotates to the dust discharge position, its front end pressing component 16 contacts the retracting component 18 inside the support component 17, pushing the retracting component 18 to slide inward and compress the spring 22. This causes the first delay switch 19 and the second delay switch 21 to press and trigger each other. After the first delay switch 19 is triggered, it controls the locking component 23 to move out and embed into the pressing component 16 to achieve locking, stopping the scraper component 5 from swinging. At the same time, the locking component 23 is an electromagnetic lock. The operating principle is implemented according to existing technology. At this time, the drain port 9... Aligning with support member 17, the second delay switch 21 triggers valve control member 24 to open the valve inside support member 17. Simultaneously, filtered clean gas is introduced into mating member 14 via air duct 1401, driving the second impeller 15 to rotate. The second impeller 15 drives the second rotating shaft 12 and fan 13 to rotate. The generated airflow enters the scraper member 5 through the cavity of rotating member 4 and air outlet 8, blowing the collected carbon powder out from drain port 9 and discharging it through discharge pipe 25. After a set delay time, the first delay switch 19 and the second delay switch 24... The delayed switch 21 automatically resets, the locking component 23 retracts to unlock the squeezing component 16, the spring 22 pushes the retracting component 18 to reset, the valve control component 24 closes the valve, and the scraping component 5 resumes rotation to continue cleaning, completing one self-cleaning cycle. This invention utilizes the airflow in the air intake pipe to drive the cleaning mechanism, thereby achieving automatic collection of toner and effectively preventing the filter element from clogging. At the same time, the filtered clean gas is drawn back and used to drive the second wind component, thereby discharging the toner collected by the cleaning mechanism, achieving coordinated operation of self-cleaning and resource utilization.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coalbed methane vertical well dual-layer pressure-diverging and combined production device, comprising a main body (1), characterized in that: The device body (1) is provided with a self-cleaning mechanism, which includes a filter element (2), a first rotating shaft (3), a rotating element (4), a scraping element (5), and a first impeller (6). The filter element (2) is fixedly connected to the device body (1). The first rotating shaft (3) is rotatably connected to both the device body (1) and the filter element (2). The rotating element (4) is fixedly connected to one end of the first rotating shaft (3). The scraping element (5) is fixedly connected to the right end of the rotating element (4). The first impeller (6) is fixedly connected to the circumferential surface of the first rotating shaft (3). The first impeller (6) is located inside the device body (1).

2. The coalbed methane vertical well dual-layer pressure-diverging and combined production device according to claim 1, characterized in that, Two elastic sealing elements (7) are fixedly connected to the inner walls of both sides of the scraping component (5). The two elastic sealing elements (7) are made of elastic material. An air outlet (8) is opened through the rotating component (4). A sewage outlet (9) is opened through one end of the scraping component (5).

3. The coalbed methane vertical well dual-layer pressure-diverging and combined production device according to claim 2, characterized in that, A fixing member (10) is fixedly connected inside the main body (1) of the device, and a blowing member (11) is fixedly connected to the lower end of the fixing member (10).

4. A coalbed methane vertical well dual-layer pressure-diverging and combined production device according to claim 3, characterized in that, The blowing component (11) is rotatably connected to a second rotating shaft (12), and a fan (13) is fixedly connected to the circumferential surface of the second rotating shaft (12). The rotating component (4) has a hollow structure.

5. A coalbed methane vertical well dual-layer pressure-diverging and combined production device according to claim 4, characterized in that, The device body (1) is fixedly connected to an air duct (1401), and the lower end of the air duct (1401) is fixedly connected to a fitting part (14). The fitting part (14) is rotatably connected to a second impeller (15), and the circumferential surface of the second rotating shaft (12) is fixedly connected to the second impeller (15).

6. A coalbed methane vertical well dual-layer pressure-diverging and combined production device according to claim 5, characterized in that, The front end of the scraping component (5) is fixedly connected to the squeezing component (16), the right end of the main body (1) of the device is fixedly connected to the support component (17), the support component (17) is slidably connected to the retraction component (18), the right end of the retraction component (18) is fixedly connected to the first delay switch (19), the support component (17) is provided with the mounting platform (20), the left end of the mounting platform (20) is fixedly connected to the second delay switch (21), the support component (17) is provided with the spring (22), the two ends of the spring (22) are respectively fixedly connected to the two retraction components (18) and the mounting platform (20), the left end of the retraction component (18) is slidably connected to the locking component (23), the squeezing component (16) is slidably connected to the locking component (23), the right end of the support component (17) is fixedly connected to the valve control component (24), and the upper end of the support component (17) is fixedly connected to the discharge pipe (25).

7. A coalbed methane vertical well dual-layer pressure-diverging and combined production device according to claim 6, characterized in that, The front end of the device body (1) is fixedly connected to a first external component (26), and the right end of the device body (1) is fixedly connected to a second external component (27).

8. A method for dual-layer pressure-splitting and combined production of coalbed methane in a vertical well, comprising the coalbed methane dual-layer pressure-splitting and combined production device as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. After the coalbed methane fluid containing coal powder enters the main body (1) of the device through the first external part (26), it first passes through the filter (2) for preliminary filtration. The airflow drives the first impeller (6) to rotate, and the first impeller (6) drives the first rotating shaft (3) to rotate, which in turn drives the rotating part (4) and the scraping part (5) fixedly connected to it to move synchronously. During the rotation process, the scraping part (5) scrapes the surface of the filter (2) and scrapes the attached carbon powder into its interior. S2. During the scraping process, the carbon powder is squeezed to open the elastic seal (7) and enter the inner cavity of the scraper (5). The triangular structure of the elastic seal (7) ensures that the internal gas cannot leak out. When the scraper (5) rotates to the dust discharge position, the front end of the extrusion member (16) contacts the retractor (18) in the support member (17), pushing the retractor (18) to slide inward and compress the spring (22), so that the first delay switch (19) and the second delay switch (21) press against each other to trigger. After the first delay switch (19) is triggered, the locking member (23) pops out and embeds into the extrusion member (16) to achieve locking. The scraper (5) stops swinging. At this time, the drain port (9) is aligned with the support (17). At the same time, the second delay switch (21) triggers the valve control component (24) to open the valve in the support (17). Meanwhile, the filtered clean gas is introduced into the mating component (14) through the air duct (1401), which drives the second impeller (15) to rotate. The second impeller (15) drives the second rotating shaft (12) and the fan (13) to rotate. The generated airflow enters the interior of the scraper (5) through the cavity of the rotating component (4) and the air outlet (8), blowing the collected carbon powder out from the drain port (9) and discharging it through the discharge pipe (25). S3. After the set delay time, the first delay switch (19) and the second delay switch (21) automatically reset, the locking part (23) retracts to unlock the squeezing part (16), the spring (22) pushes the retracting part (18) to reset, the valve control part (24) closes the valve, and the scraping part (5) resumes rotation to continue cleaning, completing a self-cleaning cycle.

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