Dry type dust removal workbench for intelligent dust removal of workpiece surface

Abstract

The invention discloses a dry-type dust removal workbench for intelligent dust removal of the surface of a workpiece. The dry-type dust removal workbench structurally comprises a rack, a workpiece conveying system, a dust filtering system, a blowing system and a control module. The method is characterized in that the workbench is divided into at least three dust removal areas in the workpiece conveying direction, and the control module is configured to cooperatively control the conveying speed and the injection pressure, so that the workpieces are sequentially subjected to at least three times of staged dust removal with different speeds and pressures. By means of the regional and staged dynamic dust removal strategy, the contradiction between incomplete cleaning and secondary dust flying of traditional equipment is overcome, efficient and thorough refined cleaning is achieved, and meanwhile the intelligent control level and the self-adaptive capacity of the equipment are improved.

Description

Technical Field

[0001] This invention relates to the field of industrial dust removal equipment technology, and in particular to a dry dust removal workbench for intelligent dust removal of workpiece surfaces. Background Technology

[0002] In industrial production, after processing, handling, or storage, workpieces often have various dust, particulate matter, and other contaminants adhering to their surfaces. If these contaminants are not removed, they will directly affect the quality of subsequent processes such as painting, welding, assembly, and testing, and may even lead to product defects. Therefore, cleaning the surface of workpieces is an indispensable process in many manufacturing stages.

[0003] Currently, non-contact dry dust removal of workpiece surfaces mainly relies on airflow purging technology. The common method involves generating airflow using a fan, which is then blown onto the workpiece surface through nozzles or air outlets. The physical force of the airflow removes dust, which is subsequently collected and filtered by a dust collection device. This type of method has advantages such as requiring no liquids, leaving no chemical residues, and having a wide range of applications.

[0004] However, existing dry dust collection equipment still faces several common technical bottlenecks and shortcomings in practical applications. First, most equipment uses single or fixed operating parameters (such as constant conveyor speed and blowing pressure) to process all workpieces throughout the entire process. This "one-size-fits-all" approach lacks specificity and struggles to handle workpieces of varying sizes, shapes, initial cleanliness levels, and dust adhesion characteristics. For firmly attached dust, fixed parameters may lead to incomplete cleaning; while for loosened dust, excessive airflow may cause secondary re-entrainment and cross-contamination, making it difficult to achieve both cleaning efficiency and effectiveness. Second, traditional dust collection processes are often spatially uniform, lacking refined process design. The process of dust peeling from the workpiece surface, suspending in the air, and finally being captured is dynamic. Existing equipment often suffers from insufficiently optimized airflow organization, poor coordination between the blowing and suction airflows, and a tendency to cause airflow short-circuiting or turbulence, resulting in insufficient suction in some areas, dust escape, and limited overall dust collection efficiency. Furthermore, the level of automation and intelligence in existing equipment is limited. These systems typically cannot dynamically adjust operating parameters based on real-time conditions (such as dust concentration and filter clogging), nor can they preset and call up optimal dust removal programs for different types of workpieces. This results in high energy consumption and a strong reliance on operator experience, making it difficult to achieve stable, efficient, and energy-saving unmanned or intelligent production. Finally, regarding dust filtration, although multi-stage filtration (such as pre-filters, electrostatic filters, and HEPA filters) is a common solution, how to efficiently collect and reduce the load on the main filtration system for the large amount of dust generated and settled during the dust removal process, and how to ensure the long-term stable operation of the filtration system without frequent maintenance, remain issues that need improvement.

[0005] In summary, there is an urgent need in this field for a dry dust removal workbench that can achieve precise, intelligent, and efficient dust removal, in order to overcome the shortcomings of existing technologies such as poor adaptability, unstable cleaning effect, high energy consumption, and insufficient intelligence. Summary of the Invention

[0006] To overcome the aforementioned deficiencies of the prior art, the present invention provides a dry dust removal workbench for intelligent dust removal of workpiece surfaces. By setting at least three dust removal zones along the workpiece conveying direction, and by having a control module coordinate and regulate the workpiece conveying speed and blowing pressure in different zones, the workpiece undergoes phased dust removal with different intensities and strategies in sequence, thereby achieving an efficient, thorough and adaptive cleaning process.

[0007] To achieve the above objectives, the innovative aspects of this invention are as follows:

[0008] frame;

[0009] A workpiece transfer system mounted on a rack is used to carry and transfer workpieces;

[0010] A dust filtration system mounted on the rack is used to collect and purify dust-laden gases;

[0011] A jetting system, set on the workbench and connected to the dust filtration system, is used to spray airflow onto the workpiece surface to remove dust.

[0012] The control module is used to coordinate and control the conveying speed of the workpiece conveying system and the blowing pressure of the blowing system;

[0013] Along the workpiece conveying direction, the workbench is divided into at least three dust removal zones arranged sequentially; the control module is configured to control the workpiece conveying system and the blowing system, so that when the workpiece passes through the at least three dust removal zones, it undergoes at least three stages of dust removal with different conveying speeds and different blowing pressures.

[0014] Furthermore, the aforementioned workpiece conveying system is a frequency conversion conveyor belt; the dust filtration system includes a conventional filter cartridge module, an electrostatic dust removal module, and a high-efficiency filter cartridge module connected in sequence; the blowing system includes an upward blowing system located above the workpiece conveying path and a downward blowing system located below the workpiece conveying path.

[0015] At least three dust removal zones are provided, including a first zone, a second zone, and a third zone arranged sequentially along the conveying direction.

[0016] Furthermore, the aforementioned control module is configured as follows:

[0017] In the first zone, the variable frequency transmission belt is controlled to run at a first speed V1, and the jetting system is controlled to jet at a first pressure P1;

[0018] In the second zone, the variable frequency transmission belt is controlled to run at a second speed V2 greater than V1, and the jetting system is controlled to jet at a second pressure P2 greater than P1.

[0019] In the third zone, the variable frequency transmission belt is controlled to run at a third speed V3 between V1 and V2, and the jetting system is controlled to jet at a third pressure P3 less than P1.

[0020] Furthermore, the aforementioned dust filtration system also includes several built-in filter cartridges, which are arranged side by side on the frame and located below the frequency conversion transmission belt, and correspond to the second zone in vertical projection. The built-in filter cartridges adsorb dust by generating negative pressure and are equipped with a back-blowing device. The back-blowing device has a back-blowing airflow channel leading to the surface of the built-in filter cartridges, which is used to automatically start cleaning the surface of the filter cartridges when dust accumulates on the surface of the filter cartridges.

[0021] Furthermore, the aforementioned dust filtration system also has a side suction port and a bottom suction port; the side suction port is located on the side wall of the frame and is connected to the ordinary filter cartridge filtration module; several built-in filter cartridges are arranged side by side inside the bottom suction port, and the bottom suction port has several inverted V-shaped plates, each of which is located directly above the built-in filter cartridges, with a flow channel between adjacent V-shaped plates; the airflow purified by the built-in filter cartridges is introduced into the electrostatic dust removal module.

[0022] Furthermore, the present invention also includes a dust collection cabinet connected to a dust filtration system for collecting filtered dust.

[0023] Furthermore, a plasma electrostatic discharger is also provided at the beginning of the frequency conversion conveyor belt to perform electrostatic removal pretreatment on the surface of the workpiece that is about to enter the first zone.

[0024] Furthermore, the aforementioned frequency conversion transmission belt includes a transmission frame, transmission rollers disposed at both ends of the transmission frame, and a mesh transmission surface tensioned between the two transmission rollers; the down-blowing system includes several strip frames disposed within the transmission frame, with several air-blowing holes opened on the strip frames, and the air-blowing direction facing the mesh transmission surface.

[0025] Furthermore, the aforementioned air blowing system includes multiple cylindrical blocks disposed above the mesh conveying surface. Each cylindrical block has a cavity, and a strip groove is formed on its surface facing the mesh conveying surface. A baffle plate constituting the air blowing groove is provided on the strip groove. Vertical support columns are provided on both sides of the conveying frame, and the cylindrical blocks are fixed between the two support columns. The cylindrical blocks are vertically aligned with the strip frame.

[0026] Furthermore, the first, second, and third zones are each equipped with several strip frames and cylindrical blocks, and the control module is configured to independently adjust the blowing pressure of each zone.

[0027] The beneficial effects of this invention are:

[0028] 1. This invention achieves highly efficient, thorough, and controllable fine-grained dust removal. By spatially dividing the dust removal process into at least three zones and temporally designing it as a phased operation with different conveying speeds and blowing pressures, a dynamically optimized dust removal strategy is created. In the first zone, a preliminary comprehensive cleaning is performed at a lower speed and medium pressure; in the second zone, a concentrated, powerful cleaning is performed at a higher speed and maximum pressure, supplemented by targeted negative pressure collection; in the third zone, a fine-grained cleanup is performed at a moderate speed and lower pressure. This step-by-step method of "slow entry-strong attack-gentle exit" overcomes the contradictions of incomplete cleaning and secondary dust re-entrainment in traditional single-parameter modes, making the dust stripping, transport, and collection processes more orderly and efficient, significantly improving overall cleanliness and consistency.

[0029] 2. Enhanced equipment intelligence and adaptability. This invention integrates an intelligent control module to construct a closed-loop control system encompassing parameter setting, program execution, status feedback, and dynamic adjustment. This system can not only preset and execute optimized dust removal programs for different workpiece types (such as size and material), but also automatically adjust the actuator based on real-time operating conditions fed back by sensors (such as actual speed, pressure, and filter element pressure difference), ensuring the accurate and stable achievement of set parameters. This enables the equipment to automatically adapt to different production cycles and cleaning needs, significantly reducing reliance on operator experience, ensuring stable and reliable dust removal performance, and facilitating digital management of the production process. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention.

[0031] Figure 2 yes Figure 1 A cross-sectional view of the embodiment along the conveying direction.

[0032] Figure 3 This is a partial enlarged structural diagram of the end of the frequency conversion transmission belt and the blowing system in this invention (the blowing direction of the blowing holes and the blowing direction of the strip groove are marked on the diagram).

[0033] Figure 4 This is a schematic diagram of the airflow path of the dust filtration system of the present invention.

[0034] Figure 5 This is the control logic block diagram of the present invention. Detailed Implementation

[0035] 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.

[0036] Overall structural layout

[0037] like Figure 1 As shown, the dry dust removal workbench provided by the present invention mainly includes a frame 10, a workpiece conveying system 20, a dust filtration system 30, a blowing system 40, and a control module 50.

[0038] The frame 10 forms the main support framework of the equipment, typically constructed from welded or assembled steel profiles, providing the mounting base for all other functional components. The workpiece conveying system 20 is located on the upper part or side of the frame 10, used to carry and convey workpieces to be cleaned. The dust filtration system 30 is integrated inside or on one side of the frame 10, used to collect and purify dust-laden gas generated during the dust removal process. The blowing system 40 is located around the workpiece conveying path, connected to the air source of the dust filtration system 30 via pipes, used to spray high-speed airflow onto the workpiece surface to remove dust. The control module 50 is the control center of the equipment, typically installed on the frame 10 in an easily accessible location, used to coordinate and control key parameters such as the conveying speed of the workpiece conveying system 20 and the blowing pressure of the blowing system 40.

[0039] The core of this invention lies in its intelligent zoned dust removal strategy. For example... Figure 2 As shown, along the workpiece conveying direction, the worktable is divided into at least three dust removal zones 100 arranged sequentially. In this preferred embodiment, they are specifically divided into a first zone Z1, a second zone Z2, and a third zone Z3. The control module 50 is programmed to control the workpiece conveying system 20 and the blowing system 40, so that when the workpiece passes through these three zones sequentially, it undergoes three stages of dust removal with different conveying speeds and blowing pressures, thereby achieving step-by-step and targeted dust treatment.

[0040] Detailed description of workpiece transfer system and blowing system

[0041] The workpiece conveying system 20 is preferably a frequency conversion conveyor belt, and its specific structure is as follows: Figure 1 and Figure 3As shown, it includes a conveyor frame 21, conveyor rollers 22 installed at both ends of the conveyor frame 21, and a mesh conveyor surface 23 tensioned between the two conveyor rollers 22. The mesh conveyor surface 23 is preferably made of materials such as PVC or metal wire mesh, and its mesh allows airflow to pass freely, which not only prevents dust from accumulating on the belt surface, but also facilitates the airflow of the down-blowing system 42 to act on the lower surface of the workpiece. By adjusting the speed of the drive motor through a frequency converter, the running speed of the conveyor belt can be steplessly adjusted.

[0042] The jetting system 40 includes an upper blowing system 41 and a lower blowing system 42, forming a pincer-like blowing airflow. The specific structure of the lower blowing system 42 is as follows... Figure 3 As shown, it includes several strip frames 43 disposed inside the conveyor frame 21. The strip frames 43 are typically long, hollow tubes, with a series of air-blowing holes 44 on their upper surface facing the mesh conveying surface 23. Compressed air is ejected upwards through the air-blowing holes 44. The specific structure of the upper air-blowing system 41 is as follows... Figure 1 and Figure 3 As shown, it includes multiple cylindrical blocks 45 suspended above the mesh conveyor surface 23. Each cylindrical block 45 has a hollow internal structure, with a downward-facing slot 46 on its bottom surface. A baffle plate 47 for forming a concentrated airflow channel is installed at the slot 46. The cylindrical blocks 45 are fixed to both sides of the conveyor frame 21 by support columns 48 at both ends. Figure 2 As shown, the vertical projection of the cylindrical block 45 is preferably aligned with the lower strip frame 43 to ensure coordinated action of the upper and lower airflows. Each of the first zone Z1, second zone Z2, and third zone Z3 is independently equipped with several sets of strip frames 43 and cylindrical blocks 45. The control module 50 can independently adjust the air supply pressure of each zone, thereby achieving the different blowing pressures P1, P2, and P3 described in this invention.

[0043] Detailed description of dust filtration system and existing structure

[0044] The dust filtration system 30 is responsible for collecting and purifying dusty air, and includes a fan system (not labeled in the diagram) for generating suction. For example... Figure 1 and Figure 4 As shown, the fan system generates negative pressure, causing dust-laden gas to enter the filtration system through the side suction port 36 and the bottom suction port 37. The dust filtration system 30 adopts a multi-stage composite filtration design, specifically including a conventional filter module 31, an electrostatic dust removal module 32, and a high-efficiency filter module 33 connected sequentially along the airflow direction.

[0045] Here is a brief description of the existing common structures mentioned in this invention: The ordinary filter module 31 typically uses pre-efficiency or medium-efficiency filter bags / elements, made of materials such as non-woven fabric or synthetic fibers, mainly used to filter larger dust particles in the airflow, serving as pre-filtration and protecting the subsequent high-efficiency filter element. The electrostatic dust removal module 32 is a mature existing technology. Its basic principle is to use a high-voltage electric field to ionize the gas. After the dust particles are charged, they are deposited on the dust collection plate under the action of the electric field force. This module has a high collection efficiency for fine dust. The high-efficiency filter module 33 typically refers to a HEPA (High Efficiency Particulate Air) filter element or a higher-grade filter element, with a filtration efficiency of not less than 99.97% for particles larger than 0.3 microns, used to ensure the cleanliness of the final discharged gas. The back-flushing device 35 is a standard dust removal component of bag or cartridge dust collectors. Common pulse jet back-flushing devices consist of a pulse valve, a jet pipe, and a compressed air manifold. When the control module 50 issues a command, the pulse valve opens instantaneously, and compressed air is injected into the filter cartridge 34 through the nozzle on the blowpipe, causing it to expand and vibrate instantly, thereby peeling off the dust layer adhering to the surface. The plasma electrostatic discharger 60 is also a commercially available product, typically composed of a high-voltage power supply and discharge electrodes. During operation, it generates a large number of positive and negative ions to neutralize the static electricity carried on the surface of the workpiece passing beneath it, reducing dust adhesion and making it easier to remove.

[0046] Specifically, in this embodiment, the dust filtration system 30 also includes a targeted dust collection structure. For example... Figure 1 , Figure 2 and Figure 4 As shown, several built-in filter cartridges 34 are arranged side by side directly below the conveyor belt corresponding to the second zone Z2. The built-in filter cartridges 34 utilize the negative pressure generated by the fan system (not labeled in the figure) to specifically adsorb the large amount of dust that settles in the second zone due to high-pressure blowing. Each built-in filter cartridge 34 is equipped with the aforementioned back-blowing device 35 for automatic dust removal.

[0047] The air intake design of the dust filtration system 30 includes a side suction port 36 and a bottom suction port 37. Figure 1 , Figure 4 The side suction port 36 is located on the side wall of the frame 10 and collects suspended dust. The bottom suction port 37 is located below the second zone Z2 and houses the built-in filter cartridge 34. Figure 1 As shown, several inverted V-shaped plates 39 are provided above the bottom suction port 37, each V-shaped plate 39 facing a built-in filter cartridge 34. The V-shaped plates 39 can prevent large particles of debris from falling directly and impacting the filter cartridge, while the flow channels between adjacent V-shaped plates 39 ensure that the dust-laden airflow enters smoothly. The airflow purified by the built-in filter cartridge 34 is introduced into the electrostatic dust removal module 32 for further processing. All the dust collected by the filtration system eventually falls into the dust collection cabinet 38.

[0048] Additional features

[0049] A plasma electrostatic discharge device 60 is also installed at the beginning of the frequency conversion transmission belt. Figure 1 Its function is to neutralize the static electricity on the surface of the workpiece before it enters the dust removal area, greatly reducing the adhesion of dust and creating favorable conditions for subsequent physical purging.

[0050] System working principle and intelligent control

[0051] The working principle and intelligent control logic of this invention are as follows: Figure 5 As shown. The control module 50, acting as the system's control center, is electrically connected to the fan system, speed sensor, pressure sensor, differential pressure sensor, etc., forming a closed-loop control system. It can adjust parameters such as fan speed, transmission speed, and injection pressure in real time based on feedback information. Its workflow is as follows:

[0052] 1. Preparation and Pretreatment: The operator sets parameters or selects programs through the human-machine interface of the control module 50. The workpiece is placed on the conveyor belt and first passes through the plasma electrostatic discharger 60 to complete the surface electrostatic neutralization.

[0053] 2. First Stage Dust Removal (Zone 1): The workpiece enters Zone 1 (Z1). Control module 50 controls the conveyor belt to run at a low initial speed V1, allowing the workpiece sufficient dwell time; simultaneously, it controls the blowing system in this zone to operate at a moderate initial pressure P1. The combined upper and lower airflows perform a preliminary, comprehensive cleaning of the workpiece, removing most of the dust that is easily detached due to weakened static electricity.

[0054] 3. Second Stage Intensive Dust Removal (Zone Z2): The workpiece enters Zone Z2. The control module 50 instructs the transmission belt to accelerate to the highest second speed V2, while simultaneously increasing the blowing pressure to the highest second pressure P2. At this time, the strong negative pressure generated by the built-in filter cartridge 34 below is ready. The high-pressure airflow thoroughly blows up the residual dust on the workpiece surface, which is immediately captured by the powerful suction below and filtered by the built-in filter cartridge 34. This area has the highest processing intensity and is the "main battlefield" for the main dust. The cleaning of the filter cartridge is automatically completed by the back-blowing device 35.

[0055] 4. Third Stage Fine Dust Removal (Zone Z3): The workpiece enters Zone Z3. The control module 50 adjusts the speed to a moderate third speed V3 and reduces the blowing pressure to the lowest third pressure P3. A final gentle blowing and "finishing" process is performed to remove any remaining trace dust while preventing excessive airflow from causing dust to be stirred up.

[0056] 5. Full-process air purification and collection: Throughout the process, the side suction port 36 continuously collects floating dust in the air, while the bottom suction port 37 focuses on collecting settled dust. All dust-laden gas flows sequentially through the ordinary filter module 31 (coarse filtration), the electrostatic dust removal module 32 (intermediate collection), and the high-efficiency filter module 33 (fine filtration), before being discharged as clean air. The dust separated at each stage finally collects in the dust collection cabinet 38.

[0057] The control module 50 receives system status feedback information from speed sensors, pressure sensors, differential pressure sensors, etc., and adjusts the actuators such as the frequency converter, proportional valve, and fan speed in real time to form a closed-loop control, ensuring a stable and precise dust removal process. The system can also adaptively adjust the parameter combinations of V1 / V2 / V3 and P1 / P2 / P3 according to different workpiece types to achieve intelligent operation.

[0058] Summary of the advantages of this invention:

[0059] This invention employs a unique zoned, staged control strategy to dynamically match transmission speed with blowing pressure. Combined with various technologies such as upper and lower blowing, three-stage filtration, specialized negative pressure collection, and electrostatic pretreatment, it achieves efficient, deep, and intelligent cleaning of dust on workpiece surfaces. Its modular design also facilitates maintenance and functional expansion.

[0060] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0061] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0062] In conclusion, 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, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dry dust removal workbench for intelligent dust removal of workpiece surfaces, characterized in that, include: Rack (10); The workpiece transfer system (20) installed on the frame (10) is used to carry and transfer workpieces; A dust filtration system (30) installed on the frame (10) is used to collect and purify dust-laden gas; A jetting system (40) is set on the workbench and connected to the dust filtration system (30) for jetting airflow onto the workpiece surface to remove dust. The control module (50) is used to coordinate and control the conveying speed of the workpiece conveying system (20) and the blowing pressure of the blowing system (40); Along the workpiece conveying direction, the workbench is divided into at least three dust removal zones (100) arranged sequentially; the control module (50) is configured to control the workpiece conveying system (20) and the blowing system (40) so that when the workpiece passes through the at least three dust removal zones (100), it undergoes at least three stages of dust removal with different conveying speeds and different blowing pressures.

2. The dry dust removal workbench for intelligent dust removal of workpiece surface according to claim 1, characterized in that, The workpiece conveying system (20) is a frequency conversion conveyor belt; the dust filtration system (30) includes a conventional filter cartridge filtration module (31), an electrostatic dust removal module (32), and a high-efficiency filter cartridge filtration module (33) connected in sequence; the blowing system (40) includes an upward blowing system (41) set above the workpiece conveying path and a downward blowing system (42) set below the workpiece conveying path; The at least three dust removal zones (100) include a first zone (Z1), a second zone (Z2), and a third zone (Z3) arranged sequentially along the conveying direction.

3. The dry dust removal workbench for intelligent dust removal of workpiece surface according to claim 2, characterized in that, The control module (50) is configured to: In the first zone (Z1), the variable frequency transmission belt is controlled to run at a first speed V1, and the jetting system (40) is controlled to jet at a first pressure P1; In the second zone (Z2), the variable frequency transmission belt is controlled to run at a second speed V2 greater than V1, and the jetting system (40) is controlled to jet at a second pressure P2 greater than P1; In the third zone (Z3), the variable frequency transmission belt is controlled to run at a third speed V3 between V1 and V2, and the jetting system (40) is controlled to jet at a third pressure P3 less than P1.

4. The dry dust removal workbench for intelligent dust removal of workpiece surface according to claim 3, characterized in that, The dust filtration system (30) further includes a plurality of built-in filter cartridges (34), which are arranged side by side on the frame (10) and located below the frequency conversion transmission belt, and correspond to the second zone (Z2) in vertical projection; the built-in filter cartridges (34) adsorb dust by generating negative pressure and are provided with a back-blowing device (35), which has a back-blowing airflow channel leading to the surface of the built-in filter cartridges (34), and is used to automatically start to clean the surface of the filter cartridges when dust accumulates on the surface of the filter cartridges.

5. The dry dust removal workbench for intelligent dust removal of workpiece surface according to claim 4, characterized in that, The dust filtration system (30) also has a side suction port (36) and a bottom suction port (37); the side suction port (36) is located on the side wall of the frame (10) and communicates with the ordinary filter cartridge filtration module (31); a number of built-in filter cartridges (34) are arranged side by side inside the bottom suction port (37), the bottom suction port (37) has a number of inverted V-shaped plates (39), the V-shaped plates (39) are located directly above the built-in filter cartridges (34), and there is a flow channel between two adjacent V-shaped plates (39); the airflow purified by the built-in filter cartridges (34) is introduced into the electrostatic dust removal module (32).

6. The dry dust removal workbench for intelligent dust removal of workpiece surface according to claim 5, characterized in that, It also includes a dust collection cabinet (38), which is connected to the dust filtration system (30) and is used to collect filtered dust.

7. A dry dust removal workbench for intelligent dust removal of workpiece surfaces according to any one of claims 2 to 6, characterized in that, A plasma electrostatic discharger (60) is also provided at the beginning of the transmission of the frequency conversion transmission belt for pre-treating the surface of the workpiece that is about to enter the first zone (Z1) to remove static electricity.

8. The dry dust removal workbench for intelligent dust removal of workpiece surface according to claim 7, characterized in that, The variable frequency transmission belt includes a transmission frame (21), transmission rollers (22) disposed at both ends of the transmission frame (21), and a mesh transmission surface (23) tensioned between the two transmission rollers (22); the down-blowing system (42) includes a plurality of strip frames (43) disposed in the transmission frame (21), and a plurality of air-blowing holes (44) are opened on the strip frames (43), with the air-blowing direction facing the mesh transmission surface (23).

9. A dry dust removal workbench for intelligent dust removal of workpiece surfaces according to claim 8, characterized in that, The upward blowing system (41) includes a plurality of cylindrical blocks (45) disposed above the mesh conveying surface (23). Each cylindrical block (45) has a cavity and a strip groove (46) is formed on its surface facing the mesh conveying surface (23). A baffle plate (47) constituting the blowing groove is provided on the strip groove (46). Vertical support columns (48) are provided on both sides of the conveying frame (21). The cylindrical block (45) is fixed between the two support columns (48). The cylindrical block (45) is vertically aligned with the strip frame (43).

10. A dry dust removal workbench for intelligent dust removal of workpiece surfaces according to claim 9, characterized in that, The first zone (Z1), the second zone (Z2) and the third zone (Z3) are each provided with a plurality of the strip frames (43) and cylindrical blocks (45), and the control module (50) is configured to independently adjust the blowing pressure of each zone.

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