Self-cleaning filtering device for carbon black impurities in the production of semi-conductive shielding material

Abstract

The application relates to the technical field of cable material production equipment, and discloses a self-cleaning filtering device for carbon black impurities in semi-conductive shielding material production, which comprises a filtering cavity, a feeding port is fixedly communicated with the top of the filtering cavity, a discharging port is fixedly communicated with the bottom of the filtering cavity, a cylinder is fixedly installed on the inner wall of the filtering cavity through screws, a filter screen is fixedly connected to the inner wall of the cylinder, and a scraper is arranged at the bottom of the filter screen; the self-cleaning filtering device is provided with three cleaning mechanisms, namely, a scraping mechanism, a vibrating mechanism and an impact mechanism, and the filter screen can be cleaned in all directions and multidimensionally. The lower surface of the filter screen is mechanically scraped by the scraping mechanism, the adhering matters are shaken off by the vibrating mechanism through high-frequency vibration generated by impact, and the impact mechanism sprays compressed gas to the filter screen for back blowing. The three cleaning mechanisms work together, can effectively remove carbon black agglomerate impurities in different forms and with different adhesion degrees on the surface and inside the mesh of the filter screen, and effectively improve the cleaning effect.

Description

Technical Field

[0001] This invention relates to the field of cable material production equipment technology, specifically to a self-cleaning filtration device for carbon black impurities in the production of semi-conductive shielding materials. Background Technology

[0002] Semiconducting shielding material is a key material in the manufacture of medium and high voltage power cables. It is made by adding conductive carbon black to polyethylene as a base material. During the production process of the shielding material, impurities such as agglomerates (particle size 100-500μm), gel particles, and undispersed carbon black that may exist in the carbon black need to be removed by a filtration device to ensure the stability of the volume resistivity of the shielding material and the uniformity of the electric field of the cable.

[0003] Carbon black has a high specific surface area and strong adsorption properties, which easily leads to agglomeration and bridging on the filter screen surface, causing a sharp drop in filtration efficiency. Existing equipment usually requires shutdown and manual cleaning of the filter screen, which seriously affects production efficiency; To address this issue, we propose a self-cleaning filtration device for removing carbon black impurities during the production of semiconductive shielding materials. Summary of the Invention

[0004] The purpose of this invention is to provide a self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials, comprising a filtration chamber, wherein the top of the filtration chamber is fixedly connected to an inlet, the bottom of the filtration chamber is fixedly connected to an outlet, a cylinder is fixedly installed on the inner wall of the filtration chamber by screws, a filter screen is fixedly connected to the inner wall of the cylinder, and a scraper is provided at the bottom of the filter screen; A scraping mechanism is fixedly mounted on the filter chamber. The scraping mechanism cleans the lower surface of the filter screen by moving the scraper back and forth. A vibration mechanism is fixedly mounted on a scraping mechanism. The vibration mechanism is driven by the squeezing of the scraping mechanism and then vibrates by spring-forced reset impact. The impact mechanism and the vibration mechanism are fixedly mounted on the filter chamber. The impact mechanism, in conjunction with the vibration mechanism, performs a reciprocating piston movement to intermittently spray compressed gas onto the filter screen.

[0006] Preferably, the scraping mechanism includes a housing fixedly connected to one side of the filter chamber. A motor is fixedly installed on one side of the housing. The output end of the motor extends into the interior of the housing and is fixedly connected to a lead screw. A sliding block is drivenly connected to the surface of the lead screw. Two connecting rods are fixedly connected to one side of the sliding block. One end of each connecting rod extends into the interior of the filter chamber and is fixedly connected to one side of the scraper.

[0007] Preferably, the vibration mechanism includes a vibration frame fixedly connected to one side of the cylinder, a striking block is provided at the top of the vibration frame, a striking rod is fixedly connected to the top of the striking block, the top of the striking rod extends through to the top of the filter chamber, a linkage frame is fixedly connected to one side of the striking rod, the bottom of the linkage frame extends through to the interior of the housing and is fixedly connected to a first pressing block, a second pressing block that cooperates with the first pressing block is fixedly connected to the top of the sliding block, a spring is fixedly connected to the top of the striking block, and the top of the spring is fixedly connected to the inner wall of the filter chamber.

[0008] Preferably, the impact mechanism includes an annular box fixedly connected to the surface of the cylinder. The bottom of the annular box is fixedly connected to a jet pipe via a one-way pressure valve. One end of the jet pipe is fixedly connected to the cylinder. The top of the annular box is fixedly connected to a transmission pipe. One end of the transmission pipe extends through to the top of the filter chamber and is fixedly connected to a gas collection box. A support frame is provided at the connection between the gas collection box and the filter chamber, and the gas collection box is fixedly connected via the support frame. The top of the gas collection box is fixedly connected to an air inlet pipe. A piston rod is fixedly connected to the top of the striking rod, and the top of the piston rod extends into the interior of the air collection box and is fixedly connected to a piston plate.

[0009] Preferably, a first one-way valve is fixedly installed on the surface of the intake pipe, and a second one-way valve is fixedly installed on the surface of the transmission pipe.

[0010] Preferably, the number of jet pipes is several, and they are arranged at a 45° angle.

[0011] Preferably, the piston plate is made of rubber, and its outer surface is in contact with the inner wall of the gas collection box.

[0012] Preferably, the bottom of the first extrusion block is arc-shaped, and the two sides of the second extrusion block are sloping.

[0013] Preferably, one end of the lead screw is provided with a bearing, and is rotatably connected to one side of the filter cavity through the bearing.

[0014] Preferably, a limiting block is fixedly connected to the bottom of the sliding block, and a limiting groove is provided on the inner wall of the housing to cooperate with the limiting block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention employs a scraping mechanism. A motor drives a lead screw to rotate, which in turn drives a sliding block and a connecting rod in a linear reciprocating motion, thereby driving a scraper to move back and forth across the lower surface of the filter screen. The lead screw drive features smooth movement, precise positioning, and adjustable speed, allowing for adjustment of the scraper's movement speed and stroke according to actual working conditions, achieving uniform and continuous scraping of the lower surface of the filter screen. The scraping mechanism's housing is fixed to one side of the filter chamber, with the motor mounted on the outside of the housing. The sliding block and lead screw are internally housed within the housing, resulting in a compact overall structure that does not occupy the effective filtration space of the filter chamber. In this invention, the vibration mechanism achieves transmission through the cooperation of a second pressing block on a sliding block and a first pressing block on a linkage frame. When the sliding block reciprocates under the drive of a lead screw, the second pressing block periodically presses against the first pressing block, causing the striking rod to move upwards and compress the spring. After the second pressing block passes the first pressing block, the spring releases its elastic force, driving the striking rod and the striking block downwards to impact the vibration frame. This process relies entirely on the motion drive of the scraping mechanism, requiring no independent power source or control system, thus achieving energy self-utilization through "cleaning action driving cleaning action." In this invention, the impact mechanism reciprocates within the air collection box via a piston rod and piston plate, compressing air and sending it through a transmission pipe into the annular box, then ejecting it into the cylinder through a jet pipe. The high-speed airflow of compressed gas can penetrate the filter mesh, blowing out the fine carbon black particles embedded within the mesh, thus solving the problem that simple mechanical scraping cannot clean the inside of the mesh. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure in this invention; Figure 2 This is a perspective view taken in cross-section in this invention; Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a perspective view of a partial structure in this invention; Figure 5 This is a perspective view of a partial structure of the impact mechanism in this invention; Figure 6 This is a perspective view of the gas collection box in this invention. Figure 7 This is a perspective view of the shell in cross-section in this invention; Figure 8 This is a perspective view of the cylinder in this invention.

[0017] In the diagram: 1. Filter chamber; 2. Inlet; 3. Outlet; 4. Cylinder; 5. Filter screen; 6. Scraper; 7. Shell; 8. Motor; 9. Lead screw; 10. Sliding block; 11. Connecting rod; 12. Vibrating frame; 13. Striking block; 14. Striking rod; 15. Linkage frame; 16. First extrusion block; 17. Second extrusion block; 18. Spring; 19. Annular box; 20. Jet pipe; 21. Transmission pipe; 22. Air collection box; 23. Support frame; 24. Air inlet pipe; 25. Piston rod; 26. Piston plate; 27. First one-way valve; 28. Second one-way valve; 29. ​​Bearing; 30. Limiting block; 31. Limiting groove. Detailed Implementation

[0018] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-8 As shown, Example 1: A self-cleaning filtration device for removing carbon black impurities in the production of semiconductive shielding materials includes a filter chamber 1, a feed inlet 2 fixedly connected to the top of the filter chamber 1, a discharge outlet 3 fixedly connected to the bottom of the filter chamber 1, a cylinder 4 fixedly installed on the inner wall of the filter chamber 1 by screws, a filter screen 5 fixedly connected to the inner wall of the cylinder 4, and a scraper 6 provided at the bottom of the filter screen 5. The scraping mechanism is fixedly installed on the filter chamber 1. The scraping mechanism cleans the lower surface of the filter screen 5 by moving the scraper 6 back and forth. The vibration mechanism is fixedly mounted on the scraping mechanism. The vibration mechanism is driven by the squeezing of the scraping mechanism, and then vibrates by the spring force reset impact. The impact mechanism and vibration mechanism are fixedly installed on the filter chamber 1. The impact mechanism moves in conjunction with the vibration mechanism to reciprocate the piston movement, thereby intermittently spraying compressed gas onto the filter screen 5.

[0020] This invention achieves comprehensive, multi-dimensional self-cleaning of the filter screen 5 by integrating three cleaning mechanisms: a scraping mechanism, a vibration mechanism, and an impact mechanism. The scraping mechanism mechanically scrapes away impurities from the lower surface of the filter screen 5, the vibration mechanism generates high-frequency vibrations through impact to dislodge the adhering substances, and the impact mechanism sprays compressed gas onto the filter screen 5 for backflushing. The three cleaning mechanisms work synergistically to effectively remove carbon black agglomerates of different shapes and degrees of adhesion from the surface of the filter screen 5 and inside the mesh, effectively improving the cleaning effect.

[0021] The scraping mechanism includes a housing 7 fixedly connected to one side of the filter chamber 1. A motor 8 is fixedly installed on one side of the housing 7. The output end of the motor 8 extends into the interior of the housing 7 and is fixedly connected to a lead screw 9. A sliding block 10 is connected to the surface of the lead screw 9. Two connecting rods 11 are fixedly connected to one side of the sliding block 10. One end of the connecting rod 11 extends into the interior of the filter chamber 1 and is fixedly connected to one side of the scraper 6.

[0022] In this invention, a scraping mechanism is provided, in which a motor 8 drives a lead screw 9 to rotate. The lead screw 9 drives a sliding block 10 and a connecting rod 11 to perform linear reciprocating motion, thereby driving a scraper 6 to move reciprocally across the lower surface of the filter screen 5. The lead screw 9 transmission features smooth movement, precise positioning, and adjustable speed, allowing adjustment of the scraper 6's moving speed and stroke according to actual working conditions, achieving uniform and continuous scraping of the lower surface of the filter screen 5. The scraping mechanism's housing 7 is fixed to one side of the filter chamber 1, the motor 8 is installed on the outside of the housing 7, and the sliding block 10 and lead screw 9 are built into the housing 7. The overall structure is compact and does not occupy the effective filtration space of the filter chamber 1.

[0023] One end of the lead screw 9 is provided with a bearing 29, and is rotatably connected to one side of the filter chamber 1 through the bearing 29.

[0024] In this invention, one end of the lead screw 9 is rotatably connected to the filter chamber 1 via a bearing 29, which ensures the smoothness and coaxiality of the lead screw 9 rotation and extends the service life of the transmission system.

[0025] The bottom of the sliding block 10 is fixedly connected to the limiting block 30, and the inner wall of the housing 7 is provided with a limiting groove 31 that cooperates with the limiting block 30.

[0026] In this invention, the limiting block 30 at the bottom of the sliding block 10 cooperates with the limiting groove 31 on the inner wall of the housing 7, which restricts the rotational freedom of the sliding block 10 and ensures that the sliding block 10 only performs linear reciprocating motion under the drive of the lead screw 9, with accurate motion trajectory and no wobbling.

[0027] Example 2: The vibration mechanism includes a vibration frame 12 fixedly connected to one side of the cylinder 4. A striking block 13 is provided on the top of the vibration frame 12. A striking rod 14 is fixedly connected to the top of the striking block 13. The top of the striking rod 14 extends through to the top of the filter chamber 1. A linkage frame 15 is fixedly connected to one side of the striking rod 14. The bottom of the linkage frame 15 extends through to the interior of the housing 7 and is fixedly connected to a first pressing block 16. A second pressing block 17 that cooperates with the first pressing block 16 is fixedly connected to the top of the sliding block 10. A spring 18 is fixedly connected to the top of the striking block 13. The top of the spring 18 is fixedly connected to the inner wall of the filter chamber 1.

[0028] In this invention, the vibration mechanism achieves transmission through the cooperation of the second pressing block 17 on the sliding block 10 and the first pressing block 16 on the linkage frame 15. When the sliding block 10 reciprocates under the drive of the lead screw 9, the second pressing block 17 periodically presses the first pressing block 16, causing the striking rod 14 to move upward and compress the spring 18; when the second pressing block 17 passes the first pressing block 16, the spring 18 releases its elastic force to drive the striking rod 14 and the striking block 13 downward to strike the vibration frame 12. This process relies entirely on the motion drive of the scraping mechanism, without the need for an independent power source or control system, realizing the self-utilization of energy by "driving the cleaning action with the cleaning action".

[0029] The bottom of the first extrusion block 16 is arc-shaped, and the two sides of the second extrusion block 17 are sloping.

[0030] In this invention, the bottom of the first extrusion block 16 is arc-shaped, and the two sides of the second extrusion block 17 are sloping. When the two are in combination, they slide smoothly, have little impact, and low noise. They can also ensure that the striking rod 14 quickly resets and impacts after the second extrusion block 17 passes over the first extrusion block 16.

[0031] Example 3: The impact mechanism includes an annular box 19 fixedly connected to the surface of the cylinder 4. The bottom of the annular box 19 is fixedly connected to a jet pipe 20 through a one-way pressure valve. One end of the jet pipe 20 is fixedly connected to the cylinder 4. The top of the annular box 19 is fixedly connected to a transmission pipe 21. One end of the transmission pipe 21 extends through to the top of the filter chamber 1 and is fixedly connected to a gas collection box 22. A support frame 23 is provided at the connection between the gas collection box 22 and the filter chamber 1, and the gas collection box 22 is fixedly connected through the support frame 23. The top of the gas collection box 22 is fixedly connected to an air inlet pipe 24. A piston rod 25 is fixedly connected to the top of the striking rod 14. The top of the piston rod 25 extends into the interior of the air collection box 22 and is fixedly connected to a piston plate 26.

[0032] In this invention, the impact mechanism reciprocates within the air collection box 22 via piston rod 25 and piston plate 26, compressing air and sending it through transmission pipe 21 into the annular box 19, then ejecting it into the cylinder 4 through jet pipe 20. The high-speed airflow of compressed gas can penetrate the mesh of the filter screen 5, blowing out the fine carbon black particles embedded inside the mesh, solving the problem that simple mechanical scraping cannot clean the inside of the mesh. Piston rod 25 is fixedly connected to striking rod 14. When striking rod 14 reciprocates up and down under the drive of the vibration mechanism, piston rod 25 drives piston plate 26 to move synchronously. Each striking action completes one compression and air delivery action by piston plate 26, achieving synchronous linkage between vibration and jetting. Furthermore, the annular box 19 is arranged around the cylinder 4, with multiple jet pipes 20 evenly distributed along the bottom of the annular box 19, enabling uniform spraying of compressed gas to different areas of the filter screen 5, avoiding cleaning dead zones. The jet pipes 20 are connected to the annular box 19 via a one-way pressure valve, only activating jetting when the air pressure reaches a preset threshold, ensuring sufficient jetting force.

[0033] A first one-way valve 27 is fixedly installed on the surface of the intake pipe 24, and a second one-way valve 28 is fixedly installed on the surface of the transmission pipe 21.

[0034] The number of jet pipes 20 is several, and they are set at a 45° angle.

[0035] In this invention, the jet pipe 20 is set at a 45° angle, so that the compressed gas ejected impacts the surface of the filter screen 5 at a certain angle, which can generate both positive penetrating force and tangential shearing force. The dual effect is more conducive to removing the attached substances.

[0036] The piston plate 26 is made of rubber, and its outer surface is in contact with the inner wall of the air collection box 22.

[0037] In this invention, the piston plate 26 is made of rubber and its outer surface is in close contact with the inner wall of the air collection box 22, which has good sealing and wear resistance, can effectively compress air and is not prone to leakage during long-term use.

[0038] The working principle and usage process of this invention: As filtration time increases, impurities gradually accumulate on the upper surface of the filter screen 5, leading to increased filtration resistance and decreased filtration efficiency. At this time, after the motor 8 starts, its output shaft drives the lead screw 9 to rotate. The lead screw 9 is connected to the sliding block 10, and the rotational motion of the lead screw 9 is converted into the linear reciprocating motion of the sliding block 10. When the sliding block 10 moves axially back and forth on the lead screw 9, it drives the two connecting rods 11 fixedly connected to it to move synchronously. One end of the connecting rod 11 penetrates into the filter chamber 1 and is fixedly connected to the scraper 6. Therefore, the scraper 6 makes a reciprocating linear motion on the lower surface of the filter screen 5. When the scraper 6 moves, it scrapes off the carbon black agglomerates attached to the upper surface of the filter screen 5. The scraped impurities fall into the bottom of the filter chamber 1 under gravity and are periodically discharged through the slag discharge port. When the sliding block 10 moves back and forth on the lead screw 9, the second pressing block 17 fixed to the top of the sliding block 10 moves synchronously with the sliding block 10. When the second extrusion block 17 moves below the first extrusion block 16, due to the arc-shaped bottom of the first extrusion block 16 and the sloping sides of the second extrusion block 17, the second extrusion block 17 pushes the first extrusion block 16 upward. The rise of the first extrusion block 16 drives the linkage frame 15 and the striking rod 14 to rise synchronously. The striking rod 14 drives the striking block 13 to move upward, while compressing the spring 18, which stores elastic potential energy. The second extrusion block 17 continues to move, and its sloping side slides relative to the arc-shaped bottom of the first extrusion block 16. When the second extrusion block 17 completely passes the first extrusion block 16, the first extrusion block 16 loses its support. After the first extrusion block 16 loses its support, the compressed spring 18 releases its elastic potential energy, pushing the striking block 13 downward rapidly. The striking block 13 strikes the vibration frame 12 fixed to one side of the cylinder 4 at a certain speed, generating instantaneous impact vibration. The vibration frame 12 transmits the vibration generated by the impact to the cylinder 4, and then from the cylinder 4 to the filter screen 5. Under vibration, the carbon black agglomerates attached to the surface and mesh of filter screen 5 are shaken off and detached from the surface of filter screen 5. When the striking rod 14 moves upward under the drive of the vibration mechanism, the piston rod 25 and piston plate 26 move upward synchronously. The internal volume of the gas collection box 22 increases, the air pressure decreases, and a negative pressure is formed. At this time, the first one-way valve 27 opens, and outside air is drawn into the gas collection box 22 through the air inlet pipe 24; the second one-way valve 28 is closed to prevent the backflow of air or material in the annular box 19. When the striking rod 14 moves downward, the piston rod 25 and piston plate 26 move downward synchronously. The internal volume of the gas collection box 22 decreases, the air is compressed, and the air pressure increases. At this time, the first one-way valve 27 closes to prevent compressed air from overflowing from the air inlet pipe 24; the second one-way valve 28 opens, and compressed air enters the annular box 19 through the transmission pipe 21. Compressed air continuously enters the annular box 19, and the air pressure inside the annular box 19 gradually increases. When the air pressure reaches the opening threshold of the one-way pressure valve, the one-way pressure valve opens, and compressed air is injected into the cylinder 4 through the jet pipe 20. The jet pipe 20 is set at a 45° angle, and the compressed gas ejected impacts the surface of the filter screen 5 at a certain angle.The forward penetrating force of the high-speed airflow blows out the fine carbon black particles embedded inside the mesh, while the tangential shearing force of the airflow simultaneously helps to peel off the adhering substances on the surface of the filter screen 5.

[0039] The structure used in this application can be additionally fitted with protective measures that are common knowledge in the field of this technology under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.

[0040] It should be noted that (motor 8 and spring 18) are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the device, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0041] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0042] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning filtration device for removing carbon black impurities during the production of semiconductive shielding materials, characterized in that: The filter includes a filter chamber (1), the top of which is fixedly connected to a feed inlet (2), the bottom of which is fixedly connected to a discharge outlet (3), the inner wall of which is fixedly installed with a cylinder (4) by screws, the inner wall of which is fixedly connected with a filter screen (5), and the bottom of which is provided with a scraper (6). The scraping mechanism is fixedly installed on the filter chamber (1). The scraping mechanism cleans the lower surface of the filter screen (5) by moving the scraper (6) back and forth. A vibration mechanism is fixedly mounted on a scraping mechanism. The vibration mechanism is driven by the squeezing of the scraping mechanism and then vibrates by spring-forced reset impact. The impact mechanism and the vibration mechanism are fixedly installed on the filter chamber (1). The impact mechanism performs reciprocating piston movement in conjunction with the vibration mechanism to intermittently spray compressed gas onto the filter screen (5).

2. The self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials according to claim 1, characterized in that: The scraping mechanism includes a housing (7) fixedly connected to one side of the filter chamber (1). A motor (8) is fixedly installed on one side of the housing (7). The output end of the motor (8) extends into the interior of the housing (7) and is fixedly connected to a lead screw (9). A sliding block (10) is connected to the surface of the lead screw (9). Two connecting rods (11) are fixedly connected to one side of the sliding block (10). One end of the connecting rod (11) extends into the interior of the filter chamber (1) and is fixedly connected to one side of the scraper (6).

3. The self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials according to claim 2, characterized in that: The vibration mechanism includes a vibration frame (12) fixedly connected to one side of the cylinder (4). A striking block (13) is provided on the top of the vibration frame (12). A striking rod (14) is fixedly connected to the top of the striking block (13). The top of the striking rod (14) extends through to the top of the filter chamber (1). A linkage frame (15) is fixedly connected to one side of the striking rod (14). The bottom of the linkage frame (15) extends through to the interior of the shell (7) and is fixedly connected to a first pressing block (16). A second pressing block (17) that cooperates with the first pressing block (16) is fixedly connected to the top of the sliding block (10). A spring (18) is fixedly connected to the top of the striking block (13). The top of the spring (18) is fixedly connected to the inner wall of the filter chamber (1).

4. The self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials according to claim 3, characterized in that: The impact mechanism includes an annular box (19) fixedly connected to the surface of the cylinder (4). The bottom of the annular box (19) is fixedly connected to a jet pipe (20) through a one-way pressure valve. One end of the jet pipe (20) is fixedly connected to the cylinder (4). The top of the annular box (19) is fixedly connected to a transmission pipe (21). One end of the transmission pipe (21) extends through to the top of the filter chamber (1) and is fixedly connected to a gas collection box (22). A support frame (23) is provided at the connection between the gas collection box (22) and the filter chamber (1), and is fixedly connected through the support frame (23). The top of the gas collection box (22) is fixedly connected to an air inlet pipe (24). The top of the striking rod (14) is fixedly connected to a piston rod (25), the top of the piston rod (25) extends into the interior of the gas collection box (22), and is fixedly connected to a piston plate (26).

5. The self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials according to claim 4, characterized in that: A first one-way valve (27) is fixedly installed on the surface of the air intake pipe (24), and a second one-way valve (28) is fixedly installed on the surface of the transmission pipe (21).

6. The self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials according to claim 4, characterized in that: The number of jet pipes (20) is several, and they are arranged at a 45° angle.

7. The self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials according to claim 4, characterized in that: The piston plate (26) is made of rubber, and its outer surface is in contact with the inner wall of the gas collection box (22).

8. The self-cleaning filter device for carbon black impurities in the production of semiconductive shielding materials according to claim 3, characterized in that: The bottom of the first extrusion block (16) is arc-shaped, and the two sides of the second extrusion block (17) are sloped.

9. A self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials according to claim 2, characterized in that: One end of the lead screw (9) is provided with a bearing (29), and is rotatably connected to one side of the filter chamber (1) through the bearing (29).

10. A self-cleaning filtration device for carbon black impurities in the production of semiconductive shielding materials according to claim 2, characterized in that: The bottom of the sliding block (10) is fixedly connected to a limiting block (30), and the inner wall of the housing (7) is provided with a limiting groove (31) that cooperates with the limiting block (30).

Images