Movable self-cleaning two-stage dust removal system for high-specific-metal dust

Abstract

The utility model belongs to the technical field of dust filtration, and relates to a movable high-specific-metal dust self-cleaning two-stage dust removal system which comprises a primary cyclone pre-filtration device, a secondary filter element filtration device, a dust collection device, a blowing device, a dust suction device and a box body, the air inlet is communicated to an inlet of the first-stage cyclone pre-filtering device, an outlet of the first-stage cyclone pre-filtering device is communicated to a filtering inlet of the second-stage filter element filtering device, a filtering outlet of the second-stage filter element filtering device is communicated to an inlet of the dust suction device, and an outlet of the dust suction device is communicated to the air outlet; according to the utility model, the dust pretreatment device of the cyclone dust removal barrel and the dust secondary filtering device consisting of the four groups of filter elements are adopted to jointly form a two-stage dust removal system, the dust on the filter elements is cleaned and recycled in a pulse blowing manner, and the dust removal device has the advantages of high automation degree, remarkable dust removal effect, small occupied area and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust filtration and relates to a mobile high-density metal dust self-cleaning two-stage dust removal system. Background Art

[0002] In the powder metallurgy industry, dust removal equipment often needs to filter high-density, small-particle heavy metal dust (such as tungsten powder). This type of dust has the characteristics of high viscosity, high hardness, and small particle size. Therefore, when using traditional single dust removal equipment and dust removal methods to filter this type of dust, there are the following defects:

[0003] Poor dust removal. In the initial stages of dust removal, traditional filter elements have large pores, allowing small particles to easily pass through them, resulting in incomplete dust filtration. Furthermore, all of these dust removal devices require dust-laden air to pass through the filter or into the dust collection bucket. However, in reality, a large amount of dust-laden air fills the factory and cannot fully pass through the filter.

[0004] The filter bag is easy to clog. Long-term dust removal operation will cause the filter bag to clog, thereby increasing the dust collection resistance and greatly affecting the dust collection effect.

[0005] High maintenance costs and low automation. The filters and cartridges used in traditional workshop operations are consumable parts with high maintenance costs. Furthermore, some workshops require manual removal of filters or mechanical vibration cleaning for secondary dust recovery, resulting in a low level of automation.

[0006] The current dust removal equipment either uses a single-stage dust removal device or a mechanical dust removal method, which has problems such as poor dust removal effect, large floor space and low automation.

[0007] Therefore, a dust removal device or method with a high degree of automation and significant dust removal effect is needed to solve this technical problem. Utility Model Content

[0008] The technical solution adopted by the utility model to solve the technical problem is: a mobile high-density metal dust self-cleaning two-stage dust removal system, including: a first-stage cyclone pre-filter device, a second-stage filter element filter device, a dust collecting device, a blowing device, a dust suction device, and a box body. The first-stage cyclone pre-filter device is used to use centrifugal force to separate particles in the dust from the air flow, the second-stage filter element filter device is used to filter dust from the air flow through a folded filter element, the dust suction device is used to provide air power for the second-stage filter element filter device, and the blowing device is used to release high-pressure gas to clean the dust covered on the filter screen of the second-stage filter element filter device.

[0009] At least a plurality of mutually isolated chambers are provided in the box body, the first-stage cyclone pre-filtering device and the second-stage filter element filtering device are located in the same chamber, and the dust collecting device and the second-stage filter element filtering device are located in different chambers.

[0010] An air inlet and an air outlet are respectively provided on the side walls of the box body. The air inlet is connected to the inlet of the first-stage cyclone pre-filter device, the outlet of the first-stage cyclone pre-filter device is connected to the filter inlet of the second-stage filter element filter device, the filter outlet of the second-stage filter element filter device is connected to the inlet of the dust collection device, and the outlet of the dust collection device is connected to the air outlet.

[0011] The blowing device includes: a differential pressure sensor, an air storage tank, and an exhaust pipeline. The differential pressure sensor is used to detect the pressure difference between the chamber where the secondary filter element filtering device is located and the outlet of the dust collection device. The air storage tank is used to store and release high-pressure gas. The outlet of the air storage tank is connected to the inlet of the exhaust pipeline, and the outlet of the exhaust pipeline is connected to the filtering outlet of the secondary filter element filtering device.

[0012] Preferably, a pulse solenoid valve is provided at the outlet of the gas storage tank, and the pulse solenoid valve is electrically connected to the pressure difference sensor.

[0013] Preferably, the pressure difference sensor is electrically connected to an electromagnetic reversing valve, which is electrically connected to a cylinder; an end cover is provided at the outlet of the first-stage cyclone pre-filtration device, which is fixedly connected to the telescopic end of the cylinder, and the fixed end of the cylinder is fixedly connected to the box body.

[0014] Preferably, the gas storage tank is provided with a gas storage pipeline.

[0015] Preferably, the first-stage cyclone pre-filtration device includes a left cyclone dust collector barrel and a right cyclone dust collector barrel, and the air inlet is connected to the inlet of the left cyclone dust collector barrel and the inlet of the right cyclone dust collector barrel respectively through a Y-shaped pipeline.

[0016] Preferably, the secondary filter element filtering device is provided with a plurality of cylindrical folded filter elements.

[0017] Preferably, the dust collection device includes a dust hopper and a dust box. The dust hopper is funnel-shaped, with a large top and a small bottom. The large end of the dust hopper is connected to the chamber where the secondary filter element filter device is located, and the small end of the dust hopper is connected to the dust box. The dust collection device is provided with a dust drawer, which is retractably mounted on the dust box, with the upper end of the dust drawer facing the small end of the dust hopper. A roller is provided at the bottom of the dust drawer, with both ends of the roller fixedly connected to the inner bushing of the deep groove ball bearing, and the outer bushing of the deep groove ball bearing fixedly connected to the box body.

[0018] More preferably, the box includes three mutually isolated chambers, the blowing device and the dust suction device are located in the upper chamber, the first-stage cyclone pre-filtration device and the second-stage filter element filtration device are located in the middle chamber, and the dust collection device is located in the lower chamber.

[0019] More preferably, universal wheels are provided at the bottom of the box.

[0020] More preferably, an electric box is provided on the side wall of the box body, and the electric box is located in the upper chamber where the blowing device and the dust collecting device are located.

[0021] The beneficial effects of the utility model are:

[0022] 1. The utility model integrates the dust removal and filtration into one chassis, which integrates the primary dust pre-treatment device, the secondary filter element dust removal device and the pulse blowing dust cleaning device into one chassis, ensuring the dust collection efficiency and achieving a 5m 2 The dust removal work of dust-laden gas within the scope of the project was carried out. The rationality of the structural design and layout was verified through theoretical calculations. At the same time, the processing of the actual equipment was completed and it has been put into production and has achieved remarkable dust removal results.

[0023] 2. Under the negative pressure of the fan, the dust-laden air in this utility model's primary dust pretreatment device is drawn into a conical air inlet and then flows through a Y-shaped pipe into two cyclone dust collection barrels on either side. Centrifugal force separates dust particles from the airflow and flings them toward the barrel walls before they exit through the lower dust outlet. This primary dust removal device removes coarse particles larger than 20 microns in the dust-laden air, thereby reducing the load on the secondary filter element dust collection device at the rear end.

[0024] 3. This new two-stage filter dust removal system draws dust-laden air from the cyclone dust collector into four vertical filter elements under the negative pressure of the fan. Completely filtered, clean air is then discharged from the filter element exhaust ports. This two-stage filter dust removal system removes fine particles larger than 1-2 microns in diameter from dust-laden air, achieving a dust removal efficiency exceeding 99.9%.

[0025] 4. The pulse blowing dust cleaning device of the present invention can, as time goes by, cause the dust on the secondary filter element dust removal device to gradually accumulate, thereby causing the pressure difference between the fan cabin and the separation cabin to increase. The PLC controls the pulse solenoid valve to spray high-pressure air to quickly clean the dust coated on the surface of the filter element, replacing the traditional mechanical dust cleaning process.

[0026] 5. The sliding dust collecting device of the present invention can collect the heavy metal particles (such as tungsten powder) separated by the dust removal device, which usually need to be recycled. The sliding dust collecting trough designed below the dust outlet of the cyclone dust collector and below the four groups of filter elements can completely collect the dust filtered out by the filter device, and a roller is designed below to facilitate the extraction and placement of the dust collection drawer, replacing the traditional manual dust collection process, and basically realizing the automation and integration of dust removal.

[0027] 6. This utility model is a movable dust removal device box, and four universal wheels are installed at the bottom of the equipment to facilitate the movement of the dust removal device within the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the complete assembly of a mobile high-density metal dust self-cleaning two-stage dust removal system of the utility model;

[0029] Figure 2 This is a schematic diagram of the assembly of the first-stage cyclone pre-filter device of the present invention;

[0030] Figure 3 This is a schematic diagram of the assembly of the two-stage filter element filtering device of the present invention;

[0031] Figure 4 This is a schematic diagram of the assembly of the dust collecting device of the present invention;

[0032] Figure 5 This is a schematic diagram of the assembly of the blowing device of the present invention;

[0033] Figure 6 This is a schematic diagram of the assembly of the dust collection device of the present invention;

[0034] Figure 7 This is a schematic diagram of the box assembly of the present utility model.

[0035] In the figure, 1. First-stage cyclone pre-filter device; 2. Second-stage filter element filter device; 3. Dust collecting device; 4. Blowing device; 5. Dust suction device; 6. Box body; 11. Air inlet; 12. Y-shaped pipe; 13. Left cyclone dust collector; 14. Right cyclone dust collector; 15. First bolt; 16. Left cyclone dust collector end cover; 17. Right cyclone dust collector end cover; 21. First filter element; 22. Second filter element; 23. Third filter element; 24. Fourth filter element; 25. Second bolt; 31. Dust collecting device Bucket; 32. Dust box; 33. Roller; 34. Deep groove ball bearing; 35. Dust drawer; 41. Pressure difference sensor; 42. Pulse solenoid valve; 43. Gas tank; 44. Solenoid reversing valve; 45. Gas storage pipeline; 46. Exhaust pipeline; 47. Cylinder; 51. Blower; 52. Third bolt; 53. Air outlet; 61. Upper cabinet door; 62. Middle cabinet door; 63. Lower cabinet door; 64. Electric box; 65. Air inlet mounting hole; 66. Rotating shaft; 67. Universal wheel; 68. Fourth bolt. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the relevant technologies in the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] refer to Figures 1 to 7 As shown, a mobile high-density metal dust self-cleaning two-stage dust removal system of this embodiment includes: a first-stage cyclone pre-filter device 1, a second-stage filter element filter device 2, a dust collecting device 3, a blowing device 4, a dust suction device 5, and a box 6. The first-stage cyclone pre-filter device 1 is used to separate particles in the dust from the air flow by using centrifugal force, the second-stage filter element filter device 2 is used to filter dust from the air flow through a folded filter element, the dust suction device 5 is used to provide air power for the dust suction device 5, and the blowing device 4 is used to release high-pressure gas to clean the dust covered on the filter screen of the second-stage filter element filter device 2.

[0038] At least a plurality of mutually isolated chambers are provided in the box body 6. The first-stage cyclone pre-filtering device 1 and the second-stage filter element filtering device 2 are located in the same chamber, and the dust collecting device 5 and the second-stage filter element filtering device 2 are located in different chambers.

[0039] An air inlet 11 and an air outlet 53 are respectively provided on the side walls of the box body 6. The air inlet 11 is connected to the inlet of the first-stage cyclone pre-filter device 1, and the outlet of the first-stage cyclone pre-filter device 1 is connected to the filtration inlet of the second-stage filter element filtration device 2. The filtration outlet of the second-stage filter element filtration device 2 is connected to the inlet of the dust collection device 5, and the outlet of the dust collection device 5 is connected to the air outlet 53.

[0040] The blowing device 4 includes: a differential pressure sensor 41, an air tank 43, and an exhaust pipe 46. The differential pressure sensor 41 is used to detect the pressure difference between the chamber where the secondary filter element filtering device 2 is located and the outlet of the dust collection device 5. The air tank 43 is used to store and release high-pressure gas. The outlet of the air tank 43 is connected to the inlet of the exhaust pipe 46, and the outlet of the exhaust pipe 46 is connected to the filtering outlet of the secondary filter element filtering device 2.

[0041] Furthermore, a pulse solenoid valve 42 is provided at the outlet of the air storage tank 43, and the pulse solenoid valve 42 is electrically connected to the pressure difference sensor 41; when the pressure difference sensor 41 detects that the pressure difference exceeds the limit value, the pulse solenoid valve 42 is opened by PLC control, and high-pressure air is ejected from the air storage tank 43 through the exhaust pipe 46 to clean the dust covered on the filter.

[0042] Furthermore, the pressure difference sensor 41 is electrically connected to the electromagnetic reversing valve 44, and the electromagnetic reversing valve 44 is electrically connected to the cylinder 47; an end cover is provided at the outlet of the first-stage cyclone pre-filter device 1, and the end cover is fixedly connected to the telescopic end of the cylinder 47, and the fixed end of the cylinder 47 is fixedly connected to the box body 6; when the blowing device 4 performs the cleaning work of the dust covered on the filter screen, the PLC controls the operation of the electromagnetic reversing valve 44, and drives the end cover through the cylinder 47 to realize the closure of the first-stage cyclone pre-filter device 1, thereby preventing the dust generated by the cleaning of the dust covered on the filter screen from overflowing.

[0043] Furthermore, the gas tank 43 is provided with a gas storage pipeline 45; when the gas storage tank 43 has insufficient storage and the pressure drops, the operator can store gas into the gas tank 43 through the gas storage pipeline 45 to ensure the pressure in the gas tank 43, thereby ensuring the cleaning effect of the dust covered on the filter.

[0044] Furthermore, the first-stage cyclone pre-filter device 1 includes a left-side cyclone dust collector barrel 13 and a right-side cyclone dust collector barrel 14, and the air inlet 11 is respectively connected to the inlet of the left-side cyclone dust collector barrel 13 and the inlet of the right-side cyclone dust collector barrel 14 through a Y-shaped pipe 12; the two cyclone dust collector barrels can balance the filtering efficiency of the first-stage cyclone pre-filter device 1, and at the same time, in case one cyclone dust collector barrel fails, the other cyclone dust collector barrel can still ensure the operation of the first-stage cyclone pre-filter device 1, so it is safer and more reliable.

[0045] Furthermore, the secondary filter element filtering device 2 is provided with multiple (four) cylindrical folded filter elements; the filtering effect of multiple filter elements is more balanced and the continuous filtering time is longer.

[0046] Furthermore, the dust collection device 3 includes a dust hopper 31 and a dust box 32. The dust hopper 31 is funnel-shaped, with a large top and a small bottom. The large end of the dust hopper 31 is connected to the chamber where the secondary filter element filtration device 2 is located, and the small end of the dust hopper 31 is connected to the dust box 32. The dust collection device 3 is provided with a dust drawer 35, which is retractably mounted on the dust box 32, with the upper opening of the dust drawer 35 facing the small end of the dust hopper 31. The bottom of the dust drawer 35 is provided with a roller 33, the two ends of the roller 33 are fixedly connected to the inner wall of the deep groove ball bearing 34, and the outer wall of the deep groove ball bearing 34 is fixedly connected to the inner wall of the box body 6.

[0047] Furthermore, the box body 6 includes three mutually isolated chambers, namely, the upper, middle and lower chambers. The blowing device 4 and the dust suction device 5 are located in the upper chamber, the first-stage cyclone pre-filtration device 1 and the second-stage filter element filtration device 2 are located in the middle chamber, and the dust collecting device 3 is located in the lower chamber. It is more reasonable for the dust collecting device 3 to be at the bottom and the dust suction device 5 to be at the top, which is more conducive to dust removal and filtration.

[0048] Furthermore, a universal wheel 67 is provided at the bottom of the box body 6, and the universal wheel 67 facilitates the dust removal system to be moved to the working area where dust removal is required, making the dust removal operation more convenient and effective.

[0049] Furthermore, an electrical box 64 is provided on the side wall of the box body 6 , and the electrical box 64 is located in the upper chamber where the blowing device 4 and the dust collecting device 5 are located.

[0050] Example

[0051] The dust removal system of this embodiment mainly consists of a first-stage cyclone pre-filter device 1, a second-stage filter element filter device 2, a dust collecting device 3, a blowing device 4, a dust suction device 5, and a box 6. Figure 2 The first-stage cyclone pre-filter device 1 mainly comprises an air inlet 11, a Y-shaped pipe 12, a left cyclone dust collection bucket 13, a right cyclone dust collection bucket 14, a first bolt 15, a left cyclone dust collection bucket end cover 16 and a right cyclone dust collection bucket end cover 17.

[0052] The air inlet 11 is mounted on the outer wall of the dust collector housing 6 using 12 first bolts 15. A rectangular through-hole is provided on the side wall of the dust collector housing 6. The inner wall of the dust collector housing 6 is bolted to the left cyclone dust collection barrel 13 and the right cyclone dust collection barrel 14. A Y-shaped pipe 12 is mounted inside the air inlet 11 to divert the dust-laden gas sucked in by the dust collector into the left cyclone dust collection barrel 13 and the right cyclone dust collection barrel 14, respectively. The tops of the left cyclone dust collection barrel 13 and the right cyclone dust collection barrel 14 are bolted to the middle of the housing 6. The left cyclone dust collection barrel end cap 16 and the right cyclone dust collection barrel end cap 17 are mounted on the bottom of the cyclone dust collection barrel and are used to complete the closing of the left cyclone dust collection barrel 13 and the right cyclone dust collection barrel 14 when the blowing device 4 is in operation. The left and right cyclone dust collectors 13 and 14 utilize centrifugal force to separate particulate matter from dust-laden gas. Their dust removal principle is based on the inertial separation of gas-solid two-phase flow. They offer advantages such as a simple structure, no moving parts, and low maintenance costs. They effectively pre-filter coarse particles larger than 20 microns.

[0053] As attached Figure 3 The two-stage filter element 2 mainly consists of a first filter element 21, a second filter element 22, a third filter element 23, a fourth filter element 24, and second bolts 25. The first filter element 21, the second filter element 22, the third filter element 23, and the fourth filter element 24 are installed in the middle of the housing 6 using 16 second bolts 25.

[0054] As attached Figure 4 As shown, the dust collection device 3 primarily consists of a dust hopper 31, a dust box 32, a roller 33, and a deep groove ball bearing 34. The dust hopper 31 is welded to the housing 6 and collects dust removed by the primary cyclone pre-filtration device 1 and the secondary cartridge filter 2. The dust box 32 is mounted at the bottom of the dust hopper 31 to collect dust that falls from the hopper 31. The roller 33 is mounted at the bottom of the dust box 32 to facilitate removal. The end of the roller 33 is coaxially mated with the deep groove ball bearing 34, and the outer shell of the deep groove ball bearing 34 has an interference fit with a pre-set hole in the housing 6.

[0055] Attachment Figure 5As shown. The blowing device 4 is mainly composed of a pressure differential sensor 41, a pulse solenoid valve 42, an air tank 43, an electromagnetic reversing valve 44, an air storage pipeline 45, an exhaust pipeline 46 and a cylinder 47. The pressure differential sensor 41 is installed at the top air outlet 53 of the secondary filter element filtering device 2, and is used to detect the pressure difference between the upper and lower compartments of the box body 6. As dust accumulates on the surface of the four filter elements of the secondary filter element filtering device 2, the pressure difference between the upper and lower compartments of the box body 6 will increase accordingly. When the pressure difference exceeds the limit value, the pulse solenoid valve 42 is controlled by the PLC to work, and high-pressure air is ejected from the air tank 43 through the exhaust pipeline 46; when the reserve in the air tank 43 is insufficient, the operator can store air in the air tank 43 through the air pipeline 45. The cylinder 47 is used to control the opening and closing of the bottom end covers of the two cyclone dust collector barrels of the first-stage cyclone pre-filter device 1. When the blowing device 4 is cleaning the dust covered on the filter screen, the PLC controls the electromagnetic reversing valve 44 to work, and the cylinder 47 is used to seal the left cyclone dust collector barrel end cover 16 and the right cyclone dust collector barrel end cover 17, thereby preventing the dust from flowing back into the air through the cyclone dust collector barrel.

[0056] As attached Figure 6 As shown, the dust collecting device 5 is mainly composed of a blower 51 and a third bolt 52. The blower 51 is mounted on the rear wall of the box body 6 using the third bolt 52.

[0057] As attached Figure 7 As shown, the cabinet 6 consists of an upper cabinet door 61, a middle cabinet door 62, a lower cabinet door 63, an electrical box 64, an air inlet mounting hole 65, a rotating shaft 66, a universal wheel 67, and a fourth bolt 68. The upper, middle, and lower cabinet doors 61, 62, and 63 are connected to the main body of the cabinet 6 via the rotating shaft 66 and the fourth bolt 68. The upper cabinet door 61 corresponds to the upper compartment of the dust collector, which is where the blowing device 4 and the dust suction device 5 are installed. The middle cabinet door 62 corresponds to the middle compartment of the dust collector, which is where the first-stage cyclone pre-filter 1 and the second-stage cartridge filter 2 are installed. The lower cabinet door 63 corresponds to the lower compartment of the dust collector, which is where the dust collection device 3 is installed. The electrical box 64 is used to install the equipment's control switch. The air inlet mounting hole 65 is used to install the air inlet 11 and Y-shaped pipe 12 of the first-stage cyclone pre-filter 1. There are four universal wheels 67, each mounted to the bottom surface of the cabinet 6 using the fourth bolt 68, for daily movement of the equipment.

[0058] To sum up, the self-cleaning two-stage dust removal system of the utility model adopts a dust pretreatment device of a cyclone dust collection barrel and a dust secondary filtration device composed of four groups of filter elements, which together form a two-stage dust removal system. The system uses pulse blowing to complete the cleaning and recycling of dust on the filter element, and has the advantages of high degree of automation, significant dust removal effect, and small footprint.

[0059] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mobile high specific gravity metal dust self-cleaning two-stage dust removal system, characterized in that: include: A first-stage cyclone pre-filtering device (1), a second-stage filter element filtering device (2), a dust collecting device (3), a blowing device (4), a dust suction device (5), and a housing (6), wherein the first-stage cyclone pre-filtering device (1) is used to separate particles in dust from an air flow by using centrifugal force, the second-stage filter element filtering device (2) is used to filter dust from an air flow by using a folded filter element, the dust suction device (5) is used to provide air power for the second-stage filter element filtering device (2), and the blowing device (4) is used to release high-pressure gas to clean dust from the filter screen of the second-stage filter element filtering device (2); The box (6) is provided with a plurality of mutually isolated chambers, the first-stage cyclone pre-filtering device (1) and the second-stage filter element filtering device (2) are located in the same chamber, and the dust collecting device (5) and the second-stage filter element filtering device (2) are located in different chambers; An air inlet (11) and an air outlet (53) are respectively provided on the side walls of the box body (6); the air inlet (11) is connected to the inlet of the first-stage cyclone pre-filtering device (1); the outlet of the first-stage cyclone pre-filtering device (1) is connected to the filter inlet of the second-stage filter element filter device (2); the filter outlet of the second-stage filter element filter device (2) is connected to the inlet of the dust collecting device (5); and the outlet of the dust collecting device (5) is connected to the air outlet (53); The blowing device (4) comprises: a pressure difference sensor (41), an air storage tank (43), and an exhaust pipe (46); the pressure difference sensor (41) is used to detect the pressure difference between the chamber where the secondary filter element filtering device (2) is located and the outlet of the dust collecting device (5); the air storage tank (43) is used to store and release high-pressure gas; the outlet of the air storage tank (43) is connected to the inlet of the exhaust pipe (46); and the outlet of the exhaust pipe (46) is connected to the filtering outlet of the secondary filter element filtering device (2).

2. A mobile high specific gravity metal dust self-cleaning two-stage dust removal system according to claim 1, characterized in that: The outlet of the gas storage tank (43) is provided with a pulse electromagnetic valve (42), and the pulse electromagnetic valve (42) is electrically connected to the pressure difference sensor (41).

3. The mobile high specific gravity metal dust self-cleaning two-stage dust removal system according to claim 1 is characterized in that: The differential pressure sensor (41) is electrically connected to an electromagnetic reversing valve (44), and the electromagnetic reversing valve (44) is electrically connected to a cylinder (47); An end cover is provided at the outlet of the first-stage cyclone pre-filtering device (1), the end cover is fixedly connected to the telescopic end of the cylinder (47), and the fixed end of the cylinder (47) is fixedly connected to the box (6).

4. The mobile high specific gravity metal dust self-cleaning two-stage dust removal system according to claim 1 is characterized in that: The gas storage tank (43) is provided with a gas storage pipeline (45).

5. The mobile high specific gravity metal dust self-cleaning two-stage dust removal system according to claim 1 is characterized in that: The first-stage cyclone pre-filter device (1) comprises a left-side cyclone dust removal barrel (13) and a right-side cyclone dust removal barrel (14), and the air inlet (11) is connected to the inlet of the left-side cyclone dust removal barrel (13) and the inlet of the right-side cyclone dust removal barrel (14) respectively through a Y-shaped pipe (12).

6. The mobile high specific gravity metal dust self-cleaning two-stage dust removal system according to claim 1 is characterized in that: The secondary filter element filtering device (2) is provided with a plurality of cylindrical folded filter elements.

7. The mobile high-density metal dust self-cleaning two-stage dust removal system according to claim 1 is characterized in that: The dust collecting device (3) comprises a dust collecting hopper (31) and a dust collecting box (32); the dust collecting hopper (31) is in the shape of a funnel with a larger upper portion and a smaller lower portion; the larger end of the dust collecting hopper (31) is connected to the chamber where the secondary filter element filtering device (2) is located, and the smaller end of the dust collecting hopper (31) is connected to the dust collecting box (32); The dust collecting device (3) is provided with a dust collecting drawer (35), and the dust collecting drawer (35) is retractably mounted on the dust collecting box (32), with the upper opening of the dust collecting drawer (35) facing the small end of the dust collecting hopper (31). A roller (33) is provided at the bottom of the dust collecting drawer (35), and both ends of the roller (33) are fixedly connected to the inner bushing of a deep groove ball bearing (34), and the outer bushing of the deep groove ball bearing (34) is fixedly connected to the box body (6).

8. The mobile high specific gravity metal dust self-cleaning two-stage dust removal system according to claim 7 is characterized in that: The box body (6) comprises three mutually isolated chambers, namely, upper, middle and lower chambers; the blowing device (4) and the dust collecting device (5) are located in the upper chamber; the first-stage cyclone pre-filtering device (1) and the second-stage filter element filtering device (2) are located in the middle chamber; and the dust collecting device (3) is located in the lower chamber.

9. The mobile high specific gravity metal dust self-cleaning two-stage dust removal system according to claim 8, characterized in that: Universal wheels (67) are provided at the bottom of the box (6).

10. The mobile high specific gravity metal dust self-cleaning two-stage dust removal system according to claim 8, characterized in that: An electric box (64) is provided on the side wall of the box body (6), and the electric box (64) is located in the upper chamber where the blowing device (4) and the dust collecting device (5) are located.

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