Self-cleaning assembly and method for dust removal filter bag for cement plant coal grinding

Abstract

A self-cleaning assembly and method for a dust removal filter bag for cement plant coal grinding, wherein a bottom end of a first axial rod (401) of a first extensible device (4) is connected to a multi-surface mounting block (402), each mounting surface of the multi-surface mounting block (402) is provided with a fixing box (7) having an open mounting cavity (703) and a guide through-slot (705), a tension spring (5) is provided in the open mounting cavity (703), a movable insert (6) is disposed at the open mounting cavity (703) and the guide through-slot (705) and protrudes outward, and a C-shaped magnetic member (8) is fixed to a side end of the movable insert (6). A bottom end of a second axial rod (1101) of a second extensible device (11) is connected to an annular air jet component (12), upper and lower ends of the annular air jet component (12) are also fixedly provided with an electromagnetic ring (1202) cooperating with a magnetic attraction portion (802), a plurality of horizontal air outlet pipes (1201) are disposed at an inner periphery of the annular air jet component (12) and arranged around a dust removal filter bag (1), each horizontal air outlet pipe having an air outlet directly facing the filter bag (1), the plurality of horizontal air outlet pipes being connected to an air supply line (14), and the air supply line (14) being connected to an air supply mechanism (13). The present invention achieves dynamic cleaning of a dust removal filter bag (1), thereby preventing the problem of dust removal filter bag (1) cleaning requirements necessitating production system shutdowns.

Description

A self-cleaning component and method for dust collector filter bags in cement pulverizers Technical Field

[0001] This invention relates to the field of dust removal and filtration technology, and in particular to a self-cleaning component and method for dust removal filter bags in cement pulverizers. Background Technology

[0002] Cement coal grinding is an important part of the cement production process. A large amount of dust is generated during cement coal grinding, which is usually filtered directly using dust collector filter bags.

[0003] During use, dust has a certain stickiness and hygroscopicity, which makes it easy for scale to form on the inner surface of the dust collector filter bag, and it is difficult to remove through conventional dust cleaning methods.

[0004] Currently, many technicians directly disassemble the dust collector filter bags for cleaning. While this can remove the stubborn scale adhering to the inner surface of the dust collector filter bags, it requires the dust collector equipment to be shut down, which means that the entire cement coal milling production system must stop working.

[0005] In summary, the problem that needs to be solved is how to effectively clean the dust collector filter bags while avoiding production system shutdowns due to the need for filter bag cleaning. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a self-cleaning component and method for dust collector filter bags in cement pulverizers, thereby realizing dynamic cleaning of dust collector filter bags and avoiding the problem of production system stopping work due to the need for cleaning dust collector filter bags.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0008] This invention provides a self-cleaning component for dust collector filter bags in cement mills. The air inlet side of the dust collector filter bag is installed under a fixed platform. The fixed platform is equipped with an air inlet pipe for injecting exhaust gas into the dust collector filter bag. A first expansion joint and a second expansion joint are fixedly installed on the upper side of the fixed platform. The first expansion joint is equipped with a first shaft extending into the dust collector filter bag, and the bottom end of the first shaft is fixedly connected to a multi-faceted mounting block. The multi-faceted mounting block has multiple mounting surfaces around its circumference. Each mounting surface of the multi-faceted mounting block is equipped with a fixed sleeve. The fixed sleeve includes a fixed outer shell, an open mounting cavity located inside the fixed outer shell, and a guide groove located on one end face of the fixed outer shell and communicating with the open mounting cavity.

[0009] A movable insert protruding from the fixed housing is installed at the open mounting cavity and guide groove of the fixed housing. A tension spring is installed inside the open mounting cavity of the fixed housing, and the tension spring is located between the multi-faceted mounting block and the movable insert. A C-shaped magnetic component is fixedly installed on the side end of the movable insert that protrudes from the fixed housing. The C-shaped magnetic component includes a C-shaped plastic part and magnetic suction parts fixedly installed on the upper and lower sides of the C-shaped plastic part.

[0010] The second telescopic device is equipped with a second shaft located on the outside of the dust collector filter bag. The bottom end of the second shaft is fixedly connected to an annular jet component. Multiple horizontal air outlet pipes are evenly arranged around the outer periphery of the dust collector filter bag inside the annular jet component. The air outlet of the horizontal air outlet pipe is directly facing the dust collector filter bag. The multiple horizontal air outlet pipes are also connected to the air supply pipeline. The upstream of the air supply pipeline is connected to the air supply mechanism. Electromagnetic rings that cooperate with the magnetic suction part are fixedly installed on the upper and lower ends of the annular jet component.

[0011] As a preferred technical solution of the dust filter bag self-cleaning component in this invention: each mounting surface of the multi-faceted mounting block is provided with a first connecting slot, and the movable plug is provided with a second connecting slot aligned with the first connecting slot on the side facing the multi-faceted mounting block. One end of the tension spring is fixedly installed at the position of the first connecting slot, and the other end of the tension spring is fixedly installed at the position of the second connecting slot.

[0012] As a preferred technical solution of the dust filter bag self-cleaning component in this invention: each mounting surface of the multi-faceted mounting block has two annular threaded holes, the fixed housing is provided with mounting side plates located on the upper and lower sides of the open mounting cavity, the mounting side plates are provided with side plate through holes that cooperate with the annular threaded holes, and second fixing bolts are installed at the positions of the side plate through holes and the annular threaded holes.

[0013] As a preferred technical solution of the dust filter bag self-cleaning component in this invention: the movable insert includes a movable insert plate, vertical protrusions located on the upper and lower sides of one end of the movable insert plate, and a horizontal protrusion located on the other end of the movable insert plate. The C-shaped plastic part has a horizontal groove that mates with the horizontal protrusion. The vertical protrusion is slidably installed in the open mounting cavity, and the movable insert plate moves through the guide groove.

[0014] As a preferred technical solution of the dust filter bag self-cleaning component in this invention: an outer threaded hole is provided at the middle position of the side end face where the lateral protrusion is located, and a through insertion hole that matches the outer threaded hole is provided on the C-shaped plastic part. A first fixing bolt is installed at the position of the through insertion hole and the outer threaded hole.

[0015] As a preferred technical solution of the dust filter bag self-cleaning component in this invention: let the vertical dimension of the open mounting cavity be La, the vertical dimension of the guide groove be Lc, the vertical span dimension of the two vertical protrusions of the movable insert be Le, and the vertical dimension of the movable insert plate be Ls, then La>Le>Lc>Ls.

[0016] As a preferred technical solution of the dust filter bag self-cleaning component in this invention: a guide tube is fixedly welded to the outer ring side of the electromagnetic ring, the guide tube includes a guide vertical groove, and an auxiliary guide rod passing through the guide vertical groove is installed on the fixed platform.

[0017] This invention provides a self-cleaning method for dust collector filter bags in cement mills, comprising the following:

[0018] S1. After long-term use, the control system detected an increase in airflow resistance to the dust collector filter bag.

[0019] S2. The first and second telescopic devices are activated. The first telescopic device moves the combined structure of the movable plug, fixed sleeve, and C-shaped magnetic component downward by a system-preset distance. This system-preset distance is the same as the vertical distance between the two electromagnetic rings; in fact, it is the vertical opening size of the annular jet component facing inward.

[0020] S3. The second telescopic device drives the annular jet component to move synchronously, and the electromagnetic ring is horizontally aligned with the magnetic suction part of the C-shaped magnetic component.

[0021] S4. The electromagnetic ring is energized according to the system's preset energizing frequency f. During each continuous energizing period T, the magnetic suction part of the C-shaped magnetic chuck completes one magnetic suction action and impacts the inner surface of the dust collector filter bag once. When the electromagnetic ring is kept energized, the magnetic suction part of the C-shaped magnetic chuck moves towards the electromagnetic ring. When the electromagnetic ring is de-energized, the movable insert is pulled by the tension spring, and the magnetic suction part of the C-shaped magnetic chuck retracts. This cycle repeats, and the magnetic suction part repeatedly impacts the inner surface of the dust collector filter bag.

[0022] S5. When the electromagnetic ring is energized, the air supply mechanism starts and supplies air to the horizontal air outlet pipe inside the annular jet component through the air supply pipeline. The horizontal air outlet pipe blows air in the opposite direction to the dust collector filter bag.

[0023] S6. With the periodic impact of the magnetic suction unit on the dust collector filter bag and the reverse blowing of the horizontal air outlet pipe on the dust collector filter bag, the blockage on the inner surface of the dust collector filter bag separates from the dust collector filter bag.

[0024] S7. The first telescopic device drives the combination structure of the movable plug, fixed sleeve and C-shaped magnetic suction to move down by a system preset distance value, repeating the steps of S3 to S6 until the cleaning of the entire inner surface of the filter bag is completed or the air inlet pipe detects that the airflow resistance to the dust collector filter bag is lower than the system preset airflow reference resistance.

[0025] In addition, a cleaning collector is installed below the dust filter bag. After the entire dust filter bag is cleaned, the control system opens the cleaning collector once to collect the stubborn scale that has been separated from the surface of the dust filter bag.

[0026] During the cleaning process described above, the air intake pipe can continue to allow air to enter, and the dust filter bag continues to filter the flue gas for dust removal.

[0027] Compared with existing technologies, the beneficial effects of this invention are:

[0028] 1. This invention utilizes a design that combines a flexible, telescopic C-shaped magnetic suction component with a ring-shaped air jet component. By energizing an electromagnetic ring according to a preset energizing frequency and duration, the impact action of the C-shaped magnetic suction component is precisely controlled. This, combined with the air supply mechanism, allows air to be supplied in reverse through a horizontal air outlet pipe, separating the blockages on the inner surface of the dust collector filter bag from the filter bag and achieving efficient cleaning.

[0029] 2. The present invention has fixed sleeves and C-shaped magnetic components installed on multiple mounting surfaces of the multi-faceted mounting block, which can perform all-round cleaning of the inner surface of the dust collector filter bag.

[0030] 3. Throughout the cleaning process, the dust collector filter bag can continuously intake air and perform flue gas dust removal and filtration without disassembling the dust collector filter bag, thus avoiding downtime of the dust collector equipment and ensuring the continuous operation of the cement coal mill production system. Attached Figure Description

[0031] Figure 1 is a schematic diagram of the overall self-cleaning component of the dust removal filter bag in this invention.

[0032] Figure 2 is a cross-sectional view of the combination of the multi-faceted mounting block, tension spring, movable plug, fixed sleeve and C-shaped magnetic component in this invention.

[0033] Figure 3 is a cross-sectional view of the annular jet component in this invention.

[0034] Figure 4 is a schematic diagram of the combined structure of the multi-faceted mounting block, movable plug-in, fixed sleeve, and C-shaped magnetic component in this invention.

[0035] Figure 5 is a schematic diagram of the component disassembly structure of the multi-faceted mounting block, movable plug-in, fixed sleeve, and C-shaped magnetic connector in this invention.

[0036] Figure 6 is another side view of Figure 5.

[0037] Figure 7 is a schematic diagram of the structure of the active plug-in in this invention.

[0038] Figure 8 is a schematic diagram of the structure of the active plug-in in this invention.

[0039] Figure 9 is a schematic diagram of the structure of the fixed sleeve in this invention.

[0040] Figure 10 is a second schematic diagram of the structure of the fixed sleeve in this invention.

[0041] Figure 11 is a schematic diagram of the C-shaped magnetic suction component in this invention.

[0042] Wherein: 1-Dust collector filter bag; 2-Fixed platform; 3-Air inlet pipe; 4-First telescopic device, 401-First shaft, 402-Multi-faceted mounting block, 4021-First connecting slot, 4022-Ring threaded hole; 5-Tension spring; 6-Modible insert, 601-Modible insert plate, 602-Vertical protrusion, 603-Second connecting slot, 604-Horizontal protrusion, 605-Outer threaded hole; 7-Fixed sleeve, 701-Fixed outer shell, 702-Mounting side plate, 703-Open mounting cavity, 7 04-Side plate through hole; 705-Guide through groove; 8-C-shaped magnetic suction part; 801-C-shaped plastic part; 802-Magnetic suction part; 803-Horizontal slot; 804-Through insertion hole; 9-First fixing bolt; 10-Second fixing bolt; 11-Second telescopic device; 1101-Second shaft; 12-Annular jet component; 1201-Horizontal air outlet pipe; 1202-Electromagnetic ring; 1203-Guide pipe; 1204-Guide vertical groove; 13-Air supply mechanism; 14-Air supply pipeline; 15-Auxiliary guide rod. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0044] Example 1: This invention designs a self-cleaning component for dust removal filter bags in cement mills. The specific structural design is as follows:

[0045] Configuration of the fixed platform and dust collector filter bag: As shown in Figure 1, the air inlet side of the dust collector filter bag 1 is installed on the lower side of the fixed platform 2, which provides a stable support foundation for the entire assembly. Simultaneously, the fixed platform 2 is equipped with an air inlet pipe 3 for injecting exhaust gas into the dust collector filter bag 1. The air inlet pipe 3 is responsible for introducing the dust-laden exhaust gas into the dust collector filter bag 1 for filtration during normal operation.

[0046] Configuration of the expansion joints and related components: As shown in Figure 1, a first expansion joint 4 and a second expansion joint 11 are fixedly installed on the upper side of the fixed platform 2. The first expansion joint 4 extends into the dust filter bag 1 through its configured first shaft 401. The bottom end of the first shaft 401 is fixedly connected to a multi-faceted mounting block 402, which serves as the mounting carrier for subsequent cleaning-related components. The second expansion joint 11 is connected to the annular jet 12 located outside the dust filter bag 1 through its second shaft 1101. The second expansion joint 11 is used to control the up-and-down movement of the annular jet 12.

[0047] Multi-faceted mounting block and its connection: As shown in Figures 4, 5, and 6, the multi-faceted mounting block 402 has multiple mounting surfaces around its circumference, each used to mount the fixing sleeve 7 and related components. Each mounting surface of the multi-faceted mounting block 402 has a first connecting slot 4021 and two circumferential threaded holes 4022. The first connecting slot 4021 is used to mount the tension spring 5, and the two circumferential threaded holes 4022, through cooperation with the mounting side plate 702 on the fixing sleeve 7, use second fixing bolts 10 to firmly mount the fixing sleeve 7 onto the multi-faceted mounting block 402, thereby achieving a stable connection between the multi-faceted mounting block 402 and the fixing sleeve 7, providing basic support for subsequent internal cleaning operations.

[0048] Fixed housing and movable insert structure: As shown in Figures 9 and 10, the fixed housing 7 includes a fixed outer shell 701, an open mounting cavity 703 located within the fixed outer shell 701, and a guide groove 705 located on one end face of the fixed outer shell 701 and communicating with the open mounting cavity 703. As shown in Figures 7 and 8, a movable insert 6 is installed at the positions of the open mounting cavity 703 and the guide groove 705 of the fixed outer shell 701. The movable insert 6 includes a movable plate 601, vertical protrusions 602 located on the upper and lower sides of one end of the movable plate 601, and a transverse protrusion 604 located on the other end of the movable plate 601. The vertical protrusion 602 is slidably installed in the open mounting cavity 703, and the movable plate 601 moves through the guide groove 705. This structural design allows the movable insert 6 to slide in a specific direction within the fixed housing 7 and maintain a stable trajectory when subjected to external forces.

[0049] Installation of the tension spring and C-shaped magnetic connector: As shown in Figures 2, 5, 6, and 9, a tension spring 5 is installed in the open mounting cavity 703 of the fixed housing 701. One end of the tension spring 5 is fixedly installed at the first connecting slot 4021 of the multi-faceted mounting block 402, and the other end is fixedly installed at the second connecting slot 603 on the side of the movable plug-in 6 facing the multi-faceted mounting block 402. When the movable plug-in 6 is displaced by an external force, the tension spring 5 is stretched, storing elastic potential energy. When the external force disappears, the tension spring 5 releases the elastic potential energy, causing the movable plug-in 6 to return to its initial position along the fixed housing 701. The movable plug-in 6 protrudes from the side of the fixed housing 701 and is fixedly installed with a C-shaped magnetic suction component 8. Referring to Figures 8 and 11, the C-shaped magnetic suction component 8 includes a C-shaped plastic part 801 and magnetic suction parts 802 fixedly installed on the upper and lower sides of the C-shaped plastic part 801. The C-shaped plastic part 801 has a horizontal slot 803 that matches the transverse protrusion 604 of the movable plug-in 6 and is fixedly connected by the first fixing bolt 9. In this way, the C-shaped magnetic suction component 8 can move synchronously with the movable plug-in 6 and achieve specific functional actions under the action of the electromagnetic ring 1202 (refer to Figure 1).

[0050] Connection between the annular jet nozzle and the second shaft: Referring to Figures 1 and 3, the bottom end of the second shaft 1101 is fixedly connected to the annular jet nozzle 12. Multiple horizontal air outlet pipes 1201 are evenly arranged around the dust filter bag 1, with their outlets facing the dust filter bag 1, for reverse air blowing to assist in cleaning. The multiple horizontal air outlet pipes 1201 are connected to an air supply line 14, which is connected upstream to an air supply mechanism 13 to provide an air source for the jet nozzle.

[0051] Electromagnetic ring and guide structure: Referring to Figures 1, 2 and 3, electromagnetic rings 1202 that cooperate with the magnetic suction part 802 of the C-shaped magnetic suction part 8 are fixedly installed on the upper and lower ends of the annular jet component 12. A guide tube 1203 is fixedly welded to the outer ring side of the electromagnetic ring 1202. The guide tube 1203 includes a guide vertical groove 1204. An auxiliary guide rod 15 passing through the guide vertical groove 1204 is installed on the fixed platform 2 to ensure the stability of the annular jet component 12 when it moves up and down, so that the electromagnetic ring 1202 and the C-shaped magnetic suction part 8 can work accurately together.

[0052] Example 2: This invention designs a self-cleaning method for dust removal filter bags in cement mills, the specific steps of which are as follows:

[0053] Step 1: Monitoring airflow resistance: After long-term use, the control system detected an increase in airflow resistance when supplying air to the dust collector filter bag 1.

[0054] Step 2, First Expansion Joint Action: The first expansion joint 4 and the second expansion joint 11 are activated. The first expansion joint 4 drives the combined structure of the movable plug 6, the fixed sleeve 7, and the C-shaped magnetic suction piece 8 to move downward by a system-preset distance value. The system-preset distance value is the same as the vertical distance between the two electromagnetic rings 1202 (i.e., the vertical opening size of the annular jet piece 12 facing inward).

[0055] Step 3, Second telescopic device operation: The second telescopic device 11 drives the annular jet component 12 to move synchronously, so that the electromagnetic ring 1202 is horizontally aligned with the magnetic suction part 802 of the C-shaped magnetic suction component 8.

[0056] Step 4: Electromagnetic Ring Energization and Magnetic Impact: The electromagnetic ring 1202 is energized according to the system's preset energizing frequency f. During each continuous energizing period T, the magnetic attraction part 802 of the C-shaped magnetic attraction component 8 completes one magnetic attraction action and impacts the inner surface of the dust collector filter bag 1 once. When the electromagnetic ring 1202 is kept energized, the magnetic attraction part 802 of the C-shaped magnetic attraction component 8 moves towards the electromagnetic ring. When the electromagnetic ring 1202 is de-energized, the movable plug 6 is pulled by the tension spring 5, and the magnetic attraction part 802 of the C-shaped magnetic attraction component 8 retracts. This cycle repeats, and the magnetic attraction part 802 repeatedly impacts the inner surface of the dust collector filter bag 1.

[0057] Step 5, Back-blowing: When the electromagnetic ring 1202 is energized, the air supply mechanism 13 is started. The air supply mechanism 13 supplies air to the horizontal air outlet pipe 1201 inside the annular jet component 12 through the air supply pipeline 14. The horizontal air outlet pipe 1201 blows air in the opposite direction to the dust collector filter bag 1.

[0058] Step 6: Separation of blockages: With the periodic impact of the magnetic suction unit 802 on the dust collector filter bag 1 and the reverse blowing of the horizontal air outlet pipe 1201 on the dust collector filter bag 1, the blockages on the inner surface of the dust collector filter bag 1 are separated from the dust collector filter bag 1.

[0059] Finally, the cleaning process is repeated and a completion judgment is made: the combined structure of the first telescopic device 4, the movable plug 6, the fixed sleeve 7, and the C-shaped magnetic suction piece 8 moves down another system-preset distance, repeating steps three through six until the entire inner surface of the dust collector filter bag 1 is cleaned or the air inlet pipe detects that the airflow resistance to the dust collector filter bag 1 is lower than the system-preset airflow reference resistance. A cleaning collector is installed below the dust collector filter bag 1. After the entire dust collector filter bag 1 is cleaned, the control system opens the cleaning collector once to collect the stubborn scale that has been separated from the surface of the dust collector filter bag 1. During the above cleaning process, the air inlet pipe 3 can continue to supply air, and the dust collector filter bag 1 continues to filter flue gas dust.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-cleaning assembly for a cement pulverizer dust collector filter bag, wherein the air inlet side of the dust collector filter bag (1) is installed on the lower side of a fixed platform (2), and the fixed platform (2) is equipped with an air inlet pipe (3) for injecting waste gas into the dust collector filter bag (1), characterized in that: A first telescopic device (4) and a second telescopic device (11) are fixedly installed on the upper side of the fixed platform (2). The first telescopic device (4) is equipped with a first shaft (401) that extends into the dust filter bag (1). The bottom end of the first shaft (401) is fixedly connected to a multi-faceted mounting block (402). The multi-faceted mounting block (402) has multiple mounting surfaces around its circumference. Each mounting surface of the multi-faceted mounting block (402) is equipped with a fixed sleeve (7). The fixed sleeve (7) includes a fixed outer shell (701). An open mounting cavity (703) is located within the inner perimeter of the fixed housing (701), and a guide groove (705) is located on one end face of the fixed housing (701) and communicates with the open mounting cavity (703); a movable insert (6) protruding from the fixed housing (701) is installed at the positions of the open mounting cavity (703) and the guide groove (705) of the fixed housing (701); a tension spring (5) is installed in the open mounting cavity (703) of the fixed housing (701), and the tension spring (5) is located in multiple Between the mounting block (402) and the movable insert (6); the movable insert (6) is fixedly mounted with a C-shaped magnetic suction component (8) protruding from the side of the fixed housing (701), the C-shaped magnetic suction component (8) includes a C-shaped plastic part (801) and magnetic suction parts (802) fixedly mounted on the upper and lower sides of the C-shaped plastic part (801); the second telescopic device (11) is equipped with a second shaft (1101) located outside the dust filter bag (1), the bottom end of the second shaft (1101) is fixedly connected to an annular jet component (1 2) The annular jet (12) is uniformly provided with a plurality of horizontal air outlet pipes (1201) surrounding the dust filter bag (1). The air outlet of the horizontal air outlet pipe (1201) is directly opposite the dust filter bag (1). The plurality of horizontal air outlet pipes (1201) are also connected to the air supply pipeline (14). The upstream of the air supply pipeline (14) is connected to the air supply mechanism (13). The upper and lower ends of the annular jet (12) are fixedly installed with electromagnetic rings (1202) that cooperate with the magnetic suction part (802).

2. The self-cleaning component for a cement mill coal dust collector filter bag according to claim 1, characterized in that: Each mounting surface of the multi-faceted mounting block (402) is provided with a first connecting slot (4021). The movable plug (6) is provided with a second connecting slot (603) aligned with the first connecting slot (4021) on the side facing the multi-faceted mounting block (402). One end of the tension spring (5) is fixedly installed at the position of the first connecting slot (4021), and the other end of the tension spring (5) is fixedly installed at the position of the second connecting slot (603).

3. The self-cleaning component for cement mill coal dust collector filter bags according to claim 1, characterized in that: Each mounting surface of the multi-faceted mounting block (402) has two annular threaded holes (4022). The fixed housing (701) is provided with mounting side plates (702) located on the upper and lower sides of the open mounting cavity (703). The mounting side plates (702) have side plate through holes (704) that cooperate with the annular threaded holes (4022). Second fixing bolts (10) are installed at the positions of the side plate through holes (704) and the annular threaded holes (4022).

4. The self-cleaning component for cement mill coal dust collector filter bags according to claim 1, characterized in that: The movable insert (6) includes a movable insert plate (601), a vertical protrusion (602) located on the upper and lower sides of one side of the movable insert plate (601), and a horizontal protrusion (604) located on the other side of the movable insert plate (601). The C-shaped plastic part (801) has a horizontal slot (803) that cooperates with the horizontal protrusion (604). The vertical protrusion (602) is slidably installed in the open mounting cavity (703), and the movable insert plate (601) moves through the guide groove (705).

5. The self-cleaning component for cement mill coal dust collector filter bags according to claim 4, characterized in that: An outer threaded hole (605) is provided at the middle position of the side end face where the transverse protrusion (604) is located. The C-shaped plastic part (801) is provided with a through hole (804) that matches the outer threaded hole (605). A first fixing bolt (9) is installed at the positions of the through hole (804) and the outer threaded hole (605).

6. The self-cleaning component for cement mill coal dust collector filter bags according to claim 4, characterized in that: Let the vertical dimension of the open mounting cavity (703) be La, the vertical dimension of the guide groove (705) be Lc, the vertical span dimension of the two vertical protrusions (602) of the movable plug (6) be Le, and the vertical dimension of the movable insert (601) be Ls. Then La>Le>Lc>Ls.

7. The self-cleaning component for cement mill coal dust collector filter bags according to claim 1, characterized in that: The electromagnetic ring (1202) has a guide tube (1203) fixedly welded to its outer ring side. The guide tube (1203) includes a guide groove (1204). The fixed platform (2) is equipped with an auxiliary guide rod (15) that passes through the guide groove (1204).

8. [Amended according to Rule 26, July 18, 2025] A self-cleaning method for cement mill coal dust collector filter bags, characterized in that, A self-cleaning assembly for cement mill dust collector filter bags according to any one of claims 1 to 7 includes the following: S1. After long-term use, the control system detects an increase in airflow resistance to the dust filter bag (1); S2. The first telescopic device (4) and the second telescopic device (11) are activated. The first telescopic device (4) drives the combination structure of the movable plug (6), the fixed sleeve (7), and the C-shaped magnetic suction part (8) to move down by a system-preset distance value. The system-preset distance value is the same as the vertical distance between the two electromagnetic rings (1202); S3. The second telescopic device (11) drives the annular jet part (12) to move synchronously. S4. The electromagnetic ring (1202) is horizontally aligned with the magnetic part (802) of the C-shaped magnetic chuck (8); S5. The electromagnetic ring (1202) is energized according to the preset energizing frequency f of the system. During each continuous energizing period T, the magnetic part (802) of the C-shaped magnetic chuck (8) completes one magnetic attraction action and impacts the inner surface of the dust filter bag (1). When the electromagnetic ring (1202) is energized, the magnetic part of the C-shaped magnetic chuck (8) moves toward the electromagnetic ring. When the electromagnetic ring (1202) is de-energized, the movable plug (6) is subjected to a pulling force. The spring (5) pulls the magnetic part (802) of the C-shaped magnetic chuck (8) backward, and the magnetic part (802) repeatedly strikes the inner surface of the dust collector filter bag (1); S5. At the same time as the electromagnetic ring (1202) is energized, the air supply mechanism (13) is started. The air supply mechanism (13) supplies air to the horizontal air outlet pipe (1201) inside the annular jet (12) through the air supply pipe (14). The horizontal air outlet pipe (1201) blows air in the opposite direction to the dust collector filter bag (1); S6. Accompanied by the magnetic part (802) striking the dust collector filter bag (1) around... Periodic impact and reverse air blowing of the horizontal air outlet pipe (1201) onto the dust filter bag (1) cause the blockage on the inner surface of the dust filter bag (1) to separate from the dust filter bag (1); S7. The first telescopic device (4) drives the combination structure of the movable plug (6), fixed sleeve (7), and C-shaped magnetic suction piece (8) to move down by a system preset distance value, repeating the contents of steps S3 to S6 until the cleaning of the entire inner surface of the dust filter bag (1) is completed or the air inlet pipe detects that the airflow resistance to the dust filter bag (1) is lower than the system preset airflow reference resistance.

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