Dust removal device for metal powder production

Abstract

The invention relates to the technical field of dust removal equipment, and particularly discloses a dust removal device for metal powder production, which comprises a shell, a filter chamber and a cleaning device, a plurality of vertical filter bags are arranged in the filter chamber, the two ends of each filter bag are opened, and the upper and lower ends of each filter bag are respectively fixed on the filter chamber; the diameter of the middle filtering part of the filter bag is larger than that of the fixed parts at the two ends, and a cleaning device is arranged in each filter bag and comprises a spiral piece, an upper sealing piece and a lower sealing piece; according to the dust removal device for metal powder production, the diameter of the filtering part of the filtering bag is set to be larger than the diameters of the fixed parts at the two ends, the concave filtering bag is in contact with a spiral piece in cooperation with the spiral piece in the cleaning process, impurities on the inner surface of the filtering bag are scraped away, and meanwhile the filtering bag and the spiral piece directly form a spiral channel; impurities can be rapidly discharged, and dispersion is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal equipment, and particularly relates to a dust removal device for metal powder production. Background Art

[0002] A dust collector is a device used to capture and separate dust particles suspended in air or gas. In production and manufacturing such as metallurgy, casting, cement building materials, machinery, light industry, and electric power, it is necessary to eliminate dust pollution, protect the environment, and improve working conditions. Therefore, the application of dust collectors is also increasing. There are also many types of dust collectors, and the most commonly used dust collectors include cyclone dust collectors, bag dust collectors, electrostatic precipitators, wet dust collectors, etc. Especially in the process of magnesium powder processing, fine dust will be generated, and these dusts are extremely likely to explode under certain conditions.

[0003] The Chinese patent application document with the publication number of CN105032059A discloses an explosion-proof dust collector, which solves the problem that the existing dust collector is prone to explosion during use. The explosion-proof dust collector with the improved structure includes a dust removal box and an ash storage box located below the dust removal box. The dust removal box is fixedly connected to the ash storage box. The dust removal box includes a dust removal chamber and a clean air chamber. A filter bag is fixedly connected in the dust removal chamber. The ash storage box is provided with a primary air inlet and a primary air outlet that communicate with the inner cavity of the ash storage box. An explosion-proof component is provided in the dust collector. The explosion-proof component includes a first explosion-proof baffle. The first explosion-proof baffle is located in the ash storage box and is arranged towards the primary air inlet. The first explosion-proof baffle divides the upper part of the inner cavity of the ash storage box into an air inlet chamber and an air outlet chamber. The primary air inlet is connected to the air inlet chamber, and the primary air outlet is connected to the air outlet chamber. A pressure relief sheet for preventing the dust collector from exploding is also provided in the ash storage box.

[0004] However, in the related art, it is difficult to clean the filtering device in a timely manner. When cleaning the filtering device, due to the dust accumulated for a long time in the equipment, when the cleaning work starts, these fine dust particles are easily lifted and scattered into the air. When performing dust removal, the lifted dust is difficult to centrally clean and collect, and it is easy to cause the problem of incomplete cleaning during cleaning, resulting in difficult cleaning. Summary of the Invention

[0005] The present invention provides a dust removal device for metal powder production, aiming to solve the problem that when cleaning the filtering device in the related art, due to the accumulation of dust, dust is easily lifted during the cleaning process, and the scattered dust is difficult to centrally clean and collect.

[0006] A dust removal device for producing metal powder according to the present invention includes a housing and a filtration chamber, including a plurality of vertically arranged filter bags with openings at both ends. The upper and lower ends of the filter bags are respectively fixed to the filtration chamber. The diameter of the middle filtration part of the filter bag is larger than that of the two fixed parts at both ends. A cleaning device is arranged inside the filter bag. The cleaning device includes a spiral blade, an upper seal and a lower seal for sealing the upper and lower ends of the filter bag. During dust removal, the upper end of the filter bag is opened and the lower end is sealed. During cleaning, the upper seal seals the upper end of the filter bag, and the lower seal opens the lower end of the filter bag. A spiral blade is arranged along the axis direction of the filter bag inside the filter bag. A driving component rotates the spiral blade around the axis of the filter bag. An air suction device, the air suction end of the air suction device is communicated with the lower end of the filter bag, and during cleaning, it sucks air back to the filter bag, making the filter bag change from a convex state to a concave state and stick tightly to the spiral blade.

[0007] The effect is as follows: By setting the diameter of the filtration part of the filter bag to be larger than that of the two fixed parts at both ends, during filtration and cleaning, the filter bag presents two states of convex and concave respectively. During filtration, the filter bag is in a convex shape, and the gas inside the filter bag can be normally filtered without being affected by the spiral blade. During cleaning, the filter bag is in a concave shape, and the impurities accumulated on the surface of the filter bag fall off. The concave filter bag contacts the spiral blade, scraping the impurities on the inner surface of the filter bag. At the same time, a spiral channel is formed between the filter bag and the spiral blade, which can quickly discharge the impurities and prevent diffusion. The air suction device cooperates to quickly blow off the impurities on the filter bag, preventing the impurities from adhering to the holes of the filter bag and being difficult to clean.

[0008] Preferably, a lever is arranged on the filtration chamber. The spiral blade is elastic. During cleaning, the lever abuts against the lower side of the spiral blade, and the lever makes the spiral blade extend upward along the axis of rotation from the lower end. The effect is as follows: By setting the spiral blade as an elastic blade, during cleaning, the spiral blade vibrates to prevent impurities from accumulating on the surface of the spiral blade and being difficult to clean.

[0009] Preferably, the outer edge of the spiral blade is made of a flexible material. The effect is as follows: By setting the outer edge of the spiral blade as a flexible material, the spiral blade will not scratch the inner surface of the filter bag during cleaning, increasing the service life of the filter bag.

[0010] Preferably, the filtration chamber includes two upper and lower support plates. A filtration chamber is formed between the two support plates. Through holes corresponding to each other are arranged on the two support plates. A ring flange for installing the filter bag is arranged on the lower side of the through hole. An upper support rod and a lower support rod are respectively arranged on the ring flanges of the two support plates. The driving component includes a driving shaft and a driving source. The driving source is arranged on the lower support rod, and both ends of the driving shaft are rotatably connected to the upper support rod and the lower support rod respectively.

[0011] Preferably, the lower end of the spiral blade is fixedly connected to the drive shaft, and the lever is arranged on the lower side of the upper support rod. During cleaning, the lever abuts against the lower surface of the spiral blade, and the lever causes the spiral blade to extend upward along the axis of self-rotation. After overcoming the elastic force of the lever, the spiral blade returns to its original length. The effect is that the spiral blade is vibrated by setting the flexible lever to prevent impurities from depositing on the spiral blade.

[0012] Preferably, the upper seal includes a sealing plate and a rotating rod. The rotating rods are circumferentially arranged in an array along the axis of the annular flange. A sector-shaped sealing plate is arranged on one side along the axis of the rotating rod. The upper end surface of the drive shaft is rough, and the upper end surface of the drive shaft abuts against the rotating rod. When it rotates, it drives the rotating rod to make the sealing plate rotate from the vertical state to the horizontal state, and the sealing plate overlaps on the adjacent rotating rods.

[0013] Preferably, the lower seal is coaxially arranged with the lower annular flange and slides along the axis of the annular flange. The lower seal is conical, and the drive shaft is in a spiral fit with the lower seal. During cleaning, the drive shaft causes the lower seal to move downward. The effect is that by setting the upper surface of the lower seal to be conical, it is ensured that impurities will not accumulate on the lower seal during cleaning.

[0014] Preferably, a collection chamber is arranged below the filtration chamber. The lower end of the filter bag is communicated with the collection chamber, and the suction end of the air suction device is connected to the lower end of the collection chamber. The effect is that the collection chamber is arranged to connect the lower ends of all the filter bags to the collection chamber, and the air suction device can suck air from multiple filter bags simultaneously, and quickly collect the impurities of multiple filter bags.

[0015] Preferably, the circumferential surface of the lower seal in contact with the filter bag is made of a flexible material.

[0016] Preferably, the front end of the lever is made of a flexible material.

[0017] Adopting the above technical solutions, the beneficial effects of the present invention are as follows: 1. By setting the diameter of the filtration area of the filter bag to be larger than the diameter of the two end fixing areas, during the filtration and cleaning processes, the filter bag takes on two forms of being convex outward and concave inward respectively. During the filtration process, the filter bag is convex outward, and the gas inside the bag can be normally filtered without being interfered by the spiral blade. During the cleaning process, the filter bag is concave inward, and the impurities accumulated on the bag surface fall off, and cooperate with the spiral blade to make the concave filter bag contact the spiral blade, scraping the impurities on the inner surface of the filter bag. At the same time, a spiral channel is formed between the filter bag and the spiral blade, which can quickly discharge the impurities and prevent diffusion. The air suction device cooperates to quickly blow off the impurities on the filter bag, preventing the impurities from adhering to the holes of the filter bag and being difficult to clean.

[0018] 2. By setting the spiral piece as an elastic piece and setting the circumferential surface of the lower seal in contact with the filter bag as a flexible material, during cleaning, the spiral piece vibrates to prevent impurities from accumulating on the surface of the spiral piece and being difficult to clean. Moreover, when the seal moves up and down, the friction with the fixed end of the filter bag is reduced, preventing damage to the filter bag. And the flexible contact surface can provide a better sealing effect, ensuring the sealing performance during filtration.

[0019] 3. By setting a flexible lever, when cleaning, the spiral piece vibrates up and down intermittently, preventing impurities from depositing on the spiral piece and unable to be quickly collected downward along the spiral channel. The outer edge of the spiral piece is set as a flexible material, allowing the place where the spiral piece contacts the filter bag during cleaning to have a certain amount of deformation, not scratching the inner surface of the filter bag, and increasing the service life of the filter bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the dust collector.

[0021] Figure 2 is a partial cross-sectional view of the overall structure of the dust collector.

[0022] Figure 3 is a schematic diagram of the internal structure of the filtration chamber.

[0023] Figure 4 is a schematic diagram of the internal structure of the filter bag.

[0024] Figure 5 is a schematic diagram of the structure of the lower seal.

[0025] Figure 6 is Figure 5 an enlarged view of part A in

[0026] Figure 7 is a schematic diagram of the structure of the upper seal.

[0027] Figure 8 is Figure 7 an enlarged view of part B in

[0028] Figure 9 is a schematic diagram of the side of the overall structure of the dust collector.

[0029] Figure 10 is a schematic diagram of the overall structure of the spiral piece.

[0030] Reference Signs: 1. Housing; 11. Filter chamber; 12. Poking rod; 13. Support plate; 14. Through hole; 15. Ring flange; 16. Upper support rod; 17. Lower support rod; 18. Collection chamber; 2. Filter bag; 3. Spiral blade; 4. Cleaning device; 41. Upper seal; 411. Sealing plate; 412. Rotating rod; 42. Lower seal; 43. Driving assembly; 431. Driving shaft; 432. Driving source; 5. Air suction device. Detailed implementation mode

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0032] As Figures 1 to 10 shown, a dust removal device for metal powder production according to the present invention includes a housing 1, a filter chamber 11 and a cleaning device 4. A plurality of vertical filter bags 2 are arranged in the filter chamber 11. In this embodiment, five filter bags 2 are taken as an example for description. The upper and lower ends of the filter bag 2 are open, and the upper and lower ends of the filter bag 2 are respectively fixed to the filter chamber 11. The diameter of the middle filtering part of the filter bag 2 is larger than that of the two fixed parts at both ends. A cleaning device 4 is arranged in each filter bag 2. The cleaning device 4 includes a spiral blade 3, an upper seal 41 and a lower seal 42 for sealing the upper and lower ends of the filter bag 2. During dust removal, the upper seal 41 at the upper end of the filter bag 2 is opened, and the lower seal 42 at the lower end of the filter bag 2 is closed. The waste gas enters the filter bag 2 through the opened upper seal 41 from the upper end openings of the five filter bags 2. When the filter bag 2 is filtering, the filtering part is in a convex state. After the waste gas is filtered by the filter bag 2, it is discharged.

[0033] The spiral blade 3 rotates in the filter bag 2 driven by the driving assembly 43. During the rotation process, the spiral blade 3 scrapes off the metal powder attached to the inner wall of the filter bag 2. When it is necessary to clean the metal powder at the lower end of the filter bag 2, the upper seal 41 is closed, and the lower seal 42 is opened. The metal powder falls into the collection chamber 18. At this time, the spiral blade 3 continues to rotate, and the metal powder attached to the inner wall of the lower end of the filter bag 2 can be scraped off.

[0034] As Figures 3 to 6 shown, the driving assembly 43 includes a driving shaft 431 and a driving source 432. The driving source 432 is preferably a motor or the like. The lower end of the spiral blade 3 is fixed to the driving shaft 431. The driving assembly 43 makes the spiral blade 3 rotate around the axis of the filter bag 2. The air suction end of the air suction device 5 is communicated with the lower end of the filter bag 2. The air suction device 5 is preferably a negative pressure generator. During cleaning, the air suction device 5 generates negative pressure to suck the filter bag 2 in reverse. The upper seal 41 seals the upper end of the filter bag 2, and the lower seal 42 opens the lower end of the filter bag 2. The air suction device 5 changes the five filter bags 2 from a convex state to an inward concave state, so that the inner wall of the filter bag 2 is close to the spiral blade 3. The spiral blade 3 rotates under the action of the driving assembly 43 to clean the filter bag 2.

[0035] As shown Figures 2 to 9 in FIG. 1, the filtration chamber 11 includes upper and lower support plates 13. Both support plates 13 are arranged on the housing 1. A filtration chamber 11 is formed between the two support plates 13. Through holes 14 corresponding to each other up and down are arranged on the two support plates 13. A ring flange 15 for installing the filter bag 2 is arranged on the lower side of the through hole 14. The inner diameter of the ring flange 15 is the same as the diameter of the through hole 14. The ring flange 15 extends downward along the through hole 14. An upper support rod 16 and a lower support rod 17 are respectively arranged on the ring flange 15. The upper support rod 16 and the lower support rod 17 pass through the axis of the ring flange 15, and mounting holes are provided at the axis of the upper support rod 16 and the lower support rod 17. The driving source 432 is arranged on the lower support rod 17. The driving source 432 rotates the driving shaft 431. The driving shaft 431 is coaxially arranged with the filter bag 2. The driving shaft 431 passes through the mounting holes of the upper support rod 16 and the lower support rod 17, and both ends of the driving shaft 431 are rotatably connected to the upper support rod 16 and the lower support rod 17 respectively.

[0036] As shown Figures 4 to 9 in FIG. 2, the cleaning device 4 includes a spiral blade 3. The spiral blade 3 is a spiral blade 3 without a central axis. The spiral blade 3 has elasticity and is preferably made of a metal elastic sheet. The lower end of the spiral blade 3 is fixedly connected to the driving shaft 431. There is a gap between the lower end of the spiral blade 3 and the lower support rod 17. The dial rod 12 is arranged on the lower side of the upper support rod 16. The dial rod 12 is preferably in an "L" shape. The horizontal section of the dial rod 12 points to the driving shaft 431. The front end of the dial rod 12 is flexible, and the flexible material is preferably rubber. During cleaning, the dial rod 12 causes the spiral blade 3 to extend upward along the rotation axis from the lower end when rotating. When the spiral blade 3 extends, it overcomes the elasticity of the dial rod 12, causing the horizontal section of the dial rod 12 to deform. After the spiral blade 3 disengages from the dial rod 12, it returns to its original length. The outer edge of the spiral blade 3 is made of a flexible material, preferably rubber, etc., so as to prevent the spiral blade 3 from scratching the inner wall of the filter bag 2 when cleaning the filter bag 2, thereby protecting the integrity of the filter bag 2.

[0037] The rotation of the spiral blade 3 is powered by the driving source 432. When the spiral blade 3 rotates driven by the driving shaft 431, its design without a central axis enables the spiral blade 3 to more flexibly adapt to the shape of the filter bag 2, thereby more effectively cleaning the inner wall of the filter bag 2. At the same time, since the spiral blade 3 has elasticity, when encountering protrusions or uneven parts on the inner wall of the filter bag 2, the spiral blade 3 can deform, avoiding hard scratching of the filter bag 2 and further protecting the integrity of the filter bag 2.

[0038] The setting of the lever 12 is to further enhance the cleaning effect. During the rotation of the spiral blade 3, the horizontal section of the lever 12 will continuously contact the outer edge of the spiral blade 3, causing the spiral blade 3 to axially extend while rotating, so as to clean the inner wall of the filter bag 2 more deeply. The flexible design at the front end of the lever 12 can reduce the impact on the lever 12 during the extension of the spiral blade 3 and extend the service life of the lever 12. The design of the cleaning device 4 fully considers the protection of the filter bag 2 and the improvement of the cleaning effect. Through the elastic design of the spiral blade 3 and the auxiliary function of the lever 12, the effective cleaning of the inner wall of the filter bag 2 is realized while avoiding damage to the filter bag 2.

[0039] As Figures 4 to 9 shown, the cleaning device 4 further includes an upper seal 41 and a lower seal 42. The upper seal 41 includes: a sealing plate 411 and a rotating rod 412. The rotating rods 412 are arranged in a divergent shape in a circular array along the axis of the annular flange 15. One end of the rotating rod 412 passes through the raised part at the center of the upper support rod 16, and the other end is rotatably arranged in the annular flange 15. A sector-shaped sealing plate 411 is arranged on one side along the axis direction of the rotating rod 412. The upper end surface of the driving shaft 431 is rough, and the upper end surface of the driving shaft 431 abuts against the rotating rod 412. During cleaning, the driving shaft 431 rotates clockwise in the top view direction. The driving shaft 431 causes the rotating rod 412 to rotate itself, so that the sealing plate 411 rotates from the vertical state to the horizontal state. The sealing plate 411 overlaps on the adjacent rotating rods 412, and multiple sealing plates 411 are closed to form a complete circular plate to block the upper end of the filter bag 2. The lower seal 42 is coaxially arranged with the lower annular flange 15 and slides along the axis of the annular flange 15. The lower seal 42 is conical, and the upper end surface of the lower seal 42 is a conical surface. The driving shaft 431 is in spiral cooperation with the lower seal 42. During cleaning, the driving shaft 431 rotates clockwise in the top view direction. The driving shaft 431 causes the lower seal 42 to move downward until it is spirally disengaged. At this time, the lower bottom surface of the lower seal 42 is lower than the lower annular flange 15, and the lower end of the filter bag 2 is in an open state. The conical surface of the lower seal 42 can quickly discharge impurities.

[0040] The part of the lower seal 42 in contact with the lower end of the filter bag 2 is made of a flexible material, and the flexible material is preferably a rubber material. After setting the lower end of the lower seal 42 as a rubber material, the damage to the filter bag 2 when the lower seal 42 moves up and down along the filter bag 2 is effectively reduced, and after being set as a rubber material, the sealing effect of the lower seal 42 during filtration is effectively improved.

[0041] As Figures 1 to 4As shown, a collection chamber 18 is provided on the lower side of the filtration chamber 11. The collection chamber 18 is in an inverted conical shape. The lower ends of the five filter bags 2 communicate with the collection chamber 18. The suction end of the air suction device 5 is connected to the lower end of the collection chamber 18. The air suction device 5 is an external negative pressure generator (not shown in the figure). The negative pressure generator is connected to the lower end of the collection chamber 18 through a pipeline, and simultaneously performs reverse suction on the five filter bags 2. An air inlet chamber is provided on the upper side of the filtration chamber 11. The upper end of the air inlet chamber is connected to an exhaust gas pipeline. The gas to be filtered enters the air inlet chamber from the exhaust gas pipeline. The upper ends of the five filter bags 2 are all connected to the air inlet chamber. The exhaust gas entering the air inlet chamber enters the filter bags 2 from the upper ends of the filter bags 2 for filtration. After filtration, the impurities in the exhaust gas remain in the filter bags 2, and the filtered gas is discharged from the filter bags 2.

[0042] During the filtration process, metal powders or other impurities are effectively intercepted by the filter bags 2, while the clean gas continues to flow through the filter bags 2. When it is necessary to clean the filter bags 2, the rotation of the drive shaft 431 drives the lower seal 42 to move downward, causing the lower ends of the filter bags 2 to open. Under the action of gravity and with the help of the spiral blades 3, the impurities can be quickly discharged into the collection chamber 18. The inverted conical design of the collection chamber 18 helps to concentrate and discharge the impurities, facilitating subsequent cleaning and treatment work.

[0043] At the same time, the negative pressure effect of the air suction device 5 not only helps with gas filtration but also plays a key role in the cleaning process. When the lower ends of the filter bags 2 are opened, the negative pressure generator performs reverse suction on the collection chamber 18 through the pipeline, further promoting the discharge of impurities and ensuring the cleaning effect of the filter bags 2. This design not only improves the filtration efficiency of the dust removal device but also greatly simplifies the cleaning process of the filter bags 2 and reduces the maintenance cost.

[0044] In a preferred embodiment, multiple filter bags 2 can be provided. By increasing the number of filter bags 2, the filtration efficiency can be effectively improved. And in the case of a large amount of gas impurities, more filter bags 2 can effectively relieve the filtration pressure on the filter bags 2. At the same time, a larger number of filter bags 2 can increase the single-use time of the equipment. After a part of the filter bags 2 are clogged due to filtration, there are still some filter bags 2 that can filter normally, thereby reducing the frequency of cleaning the filter bags 2, increasing the single filtration time of the equipment, and at the same time, increasing the number of filter bags 2 does not affect the single cleaning time of the equipment, making the equipment have a better usage effect.

[0045] In addition, in order to further improve the dust removal efficiency, the dust removal device in this embodiment is also equipped with an automatic dust cleaning system. This system can detect the pressure difference inside and outside the filter bag 2 during filtration. After the pressure difference reaches a preset value, the negative pressure generator is started to blow the filter bag 2 in the reverse direction, effectively removing the dust attached to the surface of the filter bag 2, ensuring the continuous and efficient operation of the filter bag 2. This design not only extends the service life of the filter bag 2, but also reduces the frequency of manual maintenance, improving the automation level and operation efficiency of the overall equipment.

[0046] The implementation principle of the embodiment of the present invention is as follows: During filtration, the waste gas enters the intake cavity from the waste pipe. At this time, the sealing plate 411 is in a vertical state, the upper end of the filter bag 2 is in an open state, the lower bottom surface of the lower seal 42 is higher than the lower annular flange 15, and the lower end of the filter bag 2 is closed. At this time, the waste gas passes through the sealing plate 411 and enters the filter bag 2 for filtration. After filtration, it is discharged from the filtration chamber 11. During filtration, due to the positive pressure, the filter bag 2 is in a convex state, and the inner wall of the filter bag 2 does not contact the spiral fin 3. After filtration for a period of time, impurities accumulate in the filter bag 2, and the cleaning mode is entered. During cleaning, the drive source 432 is opened. When the drive shaft 431 rotates clockwise in the top view direction, the drive shaft 431 causes the rotating rod 412 to rotate, so that the sealing plate 411 rotates from the vertical state to the horizontal state. The sealing plate 411 overlaps on the adjacent rotating rod 412, and multiple sealing plates 411 are closed to form a complete circular plate, blocking the upper end of the filter bag 2. The drive shaft 431 rotates to make the lower seal 42 move downward until it is spirally disengaged. The lower bottom surface of the lower seal 42 is lower than the lower annular flange 15, and the lower end of the filter bag 2 is in an open state. The suction device 5 sucks the collection chamber 18. All five filter bags 2 are in a concave state, and the inner wall of the filter bag 2 is in close contact with the spiral fin 3. The filter bag 2 will be blown by the gas in the reverse direction and at the same time be scraped and cleaned by the rotation of the spiral fin 3. At the same time, the lever 12 causes the spiral fin 3 to extend upward along the rotation axis from the lower end when rotating. When the spiral fin 3 extends, it overcomes the elasticity of the lever 12, causing the horizontal section of the lever 12 to deform. After the spiral fin 3 disengages from the lever 12, it returns to its original length, causing the spiral fin 3 to vibrate to prevent impurities from accumulating on the spiral fin 3, ensuring that under the action of the suction device 5, the impurities are quickly discharged along the channel formed by the spiral fin 3 and the filter bag 2. After cleaning, it returns to the filtration state.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A dust removal device for metal powder production, comprising a housing (1) and a filtration chamber (11), characterized in that, Comprising: A plurality of vertically arranged filter bags (2), with both ends of the filter bag (2) open, the upper and lower ends of the filter bag (2) are respectively fixed to the filtration chamber (11), and the diameter of the middle filtration part of the filter bag (2) is larger than that of the two fixed parts at both ends; A cleaning device (4) is arranged inside the filter bag (2), the cleaning device (4) includes a spiral blade (3), an upper seal (41) and a lower seal (42) for sealing the upper and lower ends of the filter bag (2). During dust removal, the upper end of the filter bag (2) is opened and the lower end is sealed. During cleaning, the upper seal (41) seals the upper end of the filter bag (2), the lower seal (42) opens the lower end of the filter bag (2), and a spiral blade (3) is arranged inside the filter bag (2) along its axis direction; A driving assembly (43), the driving assembly (43) makes the spiral blade (3) rotate around the axis of the filter bag (2); An air suction device (5), the air suction end of the air suction device (5) is communicated with the lower end of the filter bag (2), and during cleaning, it sucks air reversely to the filter bag (2), so that the filter bag (2) changes from a convex state to a concave state and clings to the spiral blade (3).

2. The dust removal device for producing metal powder according to claim 1, characterized in that, A dial rod (12) is arranged on the filtration chamber (11), the spiral blade (3) is elastic. During cleaning, the dial rod (12) abuts against the lower side of the spiral blade (3), and the dial rod (12) makes the spiral blade (3) extend upward along the rotation axis from the lower end.

3. The dust removal device for metal powder production according to claim 2, wherein, The outer edge of the spiral blade (3) is made of a flexible material.

4. A dust removal device for metal powder production according to claim 1, characterized in that, The filtration chamber (11) includes two upper and lower support plates (13), a filtration chamber (11) is formed between the two support plates (13), through holes (14) corresponding up and down are arranged on the two support plates (13), a ring flange (15) for installing the filter bag (2) is arranged on the lower side of the through hole (14), an upper support rod (16) and a lower support rod (17) are respectively arranged on the ring flanges (15) of the two support plates (13), the driving assembly (43) includes a driving shaft (431) and a driving source (432), the driving source (432) is arranged on the lower support rod (17), and both ends of the driving shaft (431) are rotatably connected to the upper support rod (16) and the lower support rod (17).

5. The dust removal device for metal powder production according to claim 4, characterized in that, The lower end of the spiral blade (3) is fixedly connected to the driving shaft (431), the dial rod (12) is arranged on the lower side of the upper support rod (16). During cleaning, the dial rod (12) abuts against the lower side of the spiral blade (3), and the dial rod (12) makes the spiral blade (3) extend upward along the rotation axis from the lower end. After overcoming the elastic force of the dial rod (12), the spiral blade (3) returns to its original length.

6. The dust removal device for producing metal powder according to claim 4, wherein, The upper seal (41) includes a sealing plate (411) and a rotating rod (412), the rotating rods (412) are circumferentially arranged along the axis of the ring flange (15), a sector-shaped sealing plate (411) is arranged on one side along the axis direction of the rotating rod (412), the upper end surface of the driving shaft (431) is rough, the upper end surface of the driving shaft (431) abuts against the rotating rod (412), and when it rotates, it drives the rotating rod (412) to make the sealing plate (411) rotate from a vertical state to a horizontal state, and the sealing plate (411) overlaps on the adjacent rotating rod (412).

7. The dust removal device for metal powder production according to claim 5, characterized in that, The lower seal (42) is coaxially arranged with the lower annular flange (15) and slides along the axis of the annular flange (15). The lower seal (42) is conical, and the drive shaft (431) is in spiral fit with the lower seal (42). When cleaning, the drive shaft (431) moves the lower seal (42) downward.

8. The dust removal device for producing metal powder according to claim 1, wherein, A collection chamber (18) is arranged below the filtration chamber (11). The lower end of the filter bag (2) communicates with the collection chamber (18). The suction end of the air suction device (5) is connected to the lower end of the collection chamber (18).

9. The dust removal device for producing metal powder according to claim 7, characterized in that, The circumferential surface of the lower seal (42) in contact with the filter bag (2) is made of a flexible material.

10. A dust removal device for metal powder production according to claim 5, characterized in that, The front end of the lever (12) is made of a flexible material.

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