CN112657286A - Dust removal device of plasma cutting machine - Google Patents
Dust removal device of plasma cutting machine Download PDFInfo
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- CN112657286A CN112657286A CN202011256149.8A CN202011256149A CN112657286A CN 112657286 A CN112657286 A CN 112657286A CN 202011256149 A CN202011256149 A CN 202011256149A CN 112657286 A CN112657286 A CN 112657286A
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Abstract
The invention discloses a dust removal device of a plasma cutting machine, which comprises a cutting platform, a smoke collection unit and a smoke filtering unit, wherein the smoke collection unit comprises a flue partition plate base and a smoke air duct; the flue gas filtering unit comprises a dust remover, a conveying pipeline is connected between an air inlet of the dust remover and an outlet of a flue gas air duct, a storage box is arranged below a dust exhaust port of the dust remover, and an air exhaust pipeline, a centrifugal fan and an exhaust chimney are sequentially connected to an air exhaust port of the dust remover. The invention is convenient for installation and control, the generated cutting smoke dust is collected after being shunted, the unorganized diffusion of dust-containing gas is prevented, the surface of the filter material adopted by the filter cylinder in the dust remover is attached with a layer of silicate/polytetrafluoroethylene composite material, the high temperature resistance and the effective flame retardance are realized, the filter efficiency is high, the service life is long, and the operation and maintenance cost is reduced.
Description
Technical Field
The invention belongs to the technical field of cutting equipment, and particularly relates to a dust removal device of a plasma cutting machine.
Background
With the continuous development of science and technology, metal cutting and blanking are from manual to automatic, from flame cutting to plasma cutting and laser cutting, the production technology is continuously promoted and popularized, the application of numerical control metal cutting machines is more and more common, and especially, the plasma cutting machines are widely adopted due to the advantages of low cost, high efficiency and the like.
A plasma cutting machine is a machining tool that partially or locally melts or evaporates a metal using heat of a high-temperature plasma arc, and cuts the molten metal by means of high-speed plasma to form a cut. Therefore, when the plasma cutting machine cuts the steel plate, the molten iron is blown to the lower part of the steel plate under the high-speed impact of the plasma, and is rapidly condensed to form dust with heat. The smoke formed by the dust has high heat, large energy and strong activity, and seriously pollutes the workshop environment. According to statistics, scrap iron generated by the plasma cutting machine when the plasma cutting machine works for 8 hours a day can reach 30kg (taking the case of cutting a common carbon steel plate with the thickness of 10mm as an example), and if dust cannot be reasonably processed in time, workers are easy to suffer from occupational diseases and are not beneficial to control of product quality. Such dust must therefore be reasonably and efficiently captured and disposed of in order to maintain a good environment in the plant.
The dust removal modes of the plasma cutting machine can be generally divided into two main types: wet dust removal and dry dust removal. Wet dedusting is a process in which the dust produced is agglomerated with the aid of water into water to remove the dust. The measure that adopts at present is for placing a water tank that is equipped with alkaline water under the operation panel, along with the increase of the distance between surface of water and the steel sheet, dust removal effect is worse, just can reach 60% dust removal effect when the steel sheet is less than 10mm apart from the surface of water. Therefore, the wet dust removal is low in cost, but the effect is not ideal, and the alkaline water has certain corrosiveness on steel plates and cutting machines and can generate industrial sewage. Dry dedusting is usually carried out by installing a gas capture hood at the upper part of the flue gas source or near the cutting nozzle of the cutting machine, and sucking away the flue gas by forming negative pressure. However, when the plate is cut, because the gas is blown downwards, a small part of dust is above, most of dust is below the plate, and part of dust is scattered from the edge of the plate or the periphery of the cutting table, the wider the cutting platform is, the larger the air consumption is, and the dust removal effect is less and less ideal. In addition, because the smoke generated in the plasma cutting process is small in particle size and high in temperature, sparks are easily mixed, and enter the dust remover, the sparks can damage the filter material of the filter cylinder in the dust remover, and the filter material can be in danger of firing.
Disclosure of Invention
Based on the defects of the prior art, the invention aims to provide the dust removal device of the plasma cutting machine, which can improve the filtering effect and improve the working environment.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a dust removal device of a plasma cutting machine comprises a cutting platform, a smoke collection unit and a smoke filtering unit, wherein the cutting platform comprises a material bracket and cutting machine rails arranged on the left side and the right side of the material bracket, and a main cutting machine is arranged on the cutting machine rails; the smoke collecting unit comprises a smoke partition plate base arranged at the bottom of the material bracket, smoke air channels are arranged on the left side and the right side of the smoke partition plate base along the front-back direction, the rear end of each smoke air channel is closed, the front end of each smoke air channel is connected with a conveying pipeline, the upper end of each smoke air channel is open, and each smoke air channel is located on the inner side of the corresponding cutting machine track; a movable dust collection box which moves back and forth along the flue gas duct is arranged above the flue gas duct and comprises a dust collection box body, a connecting plate is arranged at the top of the dust collection box body, the other end of the connecting plate is arranged on the main machine of the cutting machine, and the movable dust collection box is connected with the main machine of the cutting machine through the connecting plate and moves synchronously with the main machine of the cutting machine; the bottom of the dust collection box body is open and is communicated with the flue gas duct, one side of the dust collection box body close to the flue baffle base is provided with an air inlet, the top in the dust collection box body is provided with two upper rolling shafts which correspond to each other in the front and back direction, the upper rolling shaft is positioned above the air inlet, two lower rolling shafts which correspond to each other in the front and the back are arranged at the bottom in the dust collecting box body, the upper rolling shaft and the lower rolling shaft extend along the left-right direction, the top parts of the front upper rolling shaft and the rear upper rolling shaft are provided with sealing rubber plates, the front end of the sealing rubber plate goes around the front side of the front side upper roller and the rear side of the front side lower roller and extends forwards from the bottom of the front side lower roller, the rear end of the sealing rubber plate bypasses the rear side of the rear side upper rolling shaft and the front side of the rear side lower rolling shaft and extends backwards from the bottom of the rear side lower rolling shaft, and the sealing rubber plate positioned outside the dust collection box is laid on the upper port of the flue gas duct; the flue gas filter unit includes the dust remover, the dust remover adopts pulsed cartridge filter, and the air intake intercommunication pipeline of dust remover, the discharge valve is installed to the dust exhaust mouth department of dust remover, and the dust exhaust mouth below of dust remover is provided with the storage case, and the air exit of dust remover is connected with exhaust pipe, and exhaust pipe's exit linkage has centrifugal fan, and centrifugal fan's gas outlet is connected with the exhaust chimney.
Preferably, the filter cylinder arranged in the dust collector is formed by folding and rolling a filter material, the filter material adopts polyester fiber non-woven fabric as base cloth, and the dust facing surface of the base cloth is coated with silicate/polytetrafluoroethylene composite material.
Further, the preparation method of the filter material comprises the following steps:
(1) adding polyvinyl alcohol into water, stirring until the polyvinyl alcohol is dissolved, then adding silicate, stirring for 1-5 min, and performing ultrasonic dispersion for 5-10 min to obtain a silicate dispersion liquid; wherein the addition amount of the polyvinyl alcohol in the water is 0.15-5 g/L, and the addition amount of the silicate is 20-30 g/L;
(2) mixing the polytetrafluoroethylene dispersion emulsion with the silicate dispersion liquid obtained in the step (1) according to the weight ratio of 1: 2-11, stirring for 20-30 min, and performing ultrasonic treatment for 20-30 min to obtain a mixed emulsion; wherein the solid content of the polytetrafluoroethylene dispersion emulsion is 58-62%;
(3) and (3) uniformly coating the mixed emulsion obtained in the step (2) on the surface of the base cloth in a spraying or scraping coating mode, drying and shaping by using a tentering and drying shaping machine, and cooling to room temperature to obtain the filter material.
Preferably, the coating thickness of the mixed emulsion on the surface of the base cloth in the step (3) is 10-30 μm.
Preferably, the drying temperature of the tenter drying and setting machine in the step (3) is 150 to 250 ℃, and the setting speed is 5 to 8 m/min.
Further, the silicate is selected from crushed and sieved mica and/or montmorillonite.
Preferably, the flue baffle base includes the bottom plate, and even interval is fixed with a plurality of vertical baffles on the bottom plate, the baffle all extends along left right direction.
Preferably, the box that gathers dust is formed by preceding curb plate, roof, posterior lateral plate, left side board and the seamless concatenation of right side board, the bottom of preceding curb plate and the bottom of posterior lateral plate all with the upper surface looks butt of sealed offset plate, the base of left side board and the base of right side board all are less than the upper surface in flue gas wind channel, and the right flank of left side board and the left surface seamless hugging closely of flue gas wind channel, the left surface of right side board and the seamless hugging closely of the right flank in flue gas wind channel.
Further, the longitudinal section of the dust collection box body is an isosceles trapezoid without a bottom edge.
The invention is convenient for installation and control, the cutting smoke dust generated on the cutting platform is shunted by the partition plate of the flue partition plate base, is convenient for being collected by the movable dust collection box, and prevents the dust-containing gas from being diffused in a non-organized way; the movable dust collection box is fixedly installed with the main machine of the cutting machine and synchronously moves forwards along with the cutting progress, so that an air inlet is always on the same straight line with a cutting head of the cutting machine, smoke enters a sealed smoke air channel through the air inlet of the movable dust collection box and is conveyed to a dust remover through a conveying pipeline, and purified air is discharged through an exhaust chimney through a centrifugal fan; the filter cartridge is characterized in that a layer of silicate/polytetrafluoroethylene composite material is attached to the surface of a filter material adopted by the filter cartridge arranged in the dust remover, the filter cartridge is high-temperature resistant and effective in flame retardance, a small mesh of the filter cartridge can block most of submicron dust particles, the submicron dust particles are gathered on the surface of the filter material and form a permeable dust blocking cake, most of the dust particles are blocked on the outer surface of the filter material and cannot enter the filter material, the dust particles can be effectively removed in time under the blowing of compressed air, the filtering efficiency can reach more than 99.9%, the filtering precision is at least improved by more than 3 times compared with that of polyester fiber non-woven fabrics, the service life of the filter material can be prolonged through the film coating treatment of silicate/.
Drawings
FIG. 1 is a schematic structural diagram of a dust removing device of a plasma cutting machine according to the present invention;
FIG. 2 is a top view of the cutting platform and fume collection unit of FIG. 1;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a partial schematic view of the flue gas collection unit;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic structural view of the flue gas duct, the movable dust collecting box and the sealing rubber plate on the left side in FIG. 5;
FIG. 7 is a bottom view of FIG. 6;
FIG. 8 is a cross-sectional view taken along line A-A of FIG. 6;
fig. 9 is a cross-sectional view taken along line B-B of fig. 6.
Detailed Description
In order to make the technical purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are further described with reference to specific examples, which are intended to explain the present invention and are not to be construed as limiting the present invention, and those who do not specify a specific technique or condition in the examples follow the techniques or conditions described in the literature in the art or follow the product specification.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in FIGS. 1 to 9, a plasma cutting machine dust removing apparatus, which uses the direction indicated by the arrow F in FIG. 1 as the front, comprises a cutting platform, a flue gas collecting unit and a flue gas filtering unit. The cutting platform comprises a material bracket 6 and cutting machine rails 2 arranged on the left side and the right side of the material bracket 6, the cutting machine rails 2 are arranged along the front-back direction, the bottom of each cutting machine rail 2 is fixed on a foundation 1, a cutting machine host 3 is arranged on each of the left cutting machine rail 2 and the right cutting machine rail 2, and the two cutting machine hosts 3 are oppositely arranged left and right; the left and right cutting machine main machines 3 are provided with cutting machine portal frames 4, the cutting machine portal frames 4 move back and forth along the cutting machine rails 2 through the cutting machine main machines 3, and the cutting heads 5 for cutting are arranged on the cutting machine portal frames 4. The material bracket 6, the cutting machine track 2, the cutting machine main machine 3, the cutting machine portal frame 4 and the cutting head 5 are all obtained by adopting the conventional technical means in the field.
The flue gas collection unit is including setting up in the flue baffle base 7 of material bracket 6 bottom, flue baffle base 7 includes the bottom plate, and even interval is fixed with a plurality of vertical baffles on the bottom plate, the baffle all extends along left right direction, and the top surface of baffle meets with the bottom surface of material bracket 6. Flue baffle base 7's left and right both sides all are provided with flue gas wind channel 10 along the fore-and-aft direction, the rear end in flue gas wind channel 10 is sealed, and the front end in flue gas wind channel 10 is connected with pipeline 16, the upper end in flue gas wind channel 10 is uncovered, and flue gas wind channel 10 is located the inboard of cutting machine track 2. A movable dust collection box which moves back and forth along the flue gas duct 10 is arranged above the flue gas duct 10, the movable dust collection box comprises a dust collection box body 9, a connecting plate 8 is arranged at the top of the dust collection box body 9, the other end of the connecting plate 8 is installed on the cutting machine main body 3, and the movable dust collection box is connected with the cutting machine main body 3 through the connecting plate 8 and moves synchronously with the cutting machine main body 3. The dust collection box body 9 is formed by seamlessly splicing a front side plate 902, a top plate 903, a rear side plate 904, a left side plate 905 and a right side plate 901, the longitudinal section of the dust collection box body 9 is an isosceles trapezoid without a bottom edge, the bottom of the dust collection box body 9 is open, and the bottom of the dust collection box body 9 is communicated with a flue gas duct 10; one side of the dust collection box body 9 close to the flue partition plate base 7 is provided with an air inlet 18 (namely, the air inlet 18 of the dust collection box body 9 on the left side is arranged on the right side plate 901; the air inlet 18 of the dust collection box body 9 on the right side is arranged on the left side plate 905), and the air inlet 18 is in an isosceles trapezoid shape; two front and back corresponding upper rollers 19 and two front and back corresponding lower rollers 20 are mounted between the left side plate 905 and the right side plate 901, the upper rollers 19 are located above the air inlet 18, the lower rollers 20 are located at the bottom of the dust collection box body 9, and the upper rollers 19 and the lower rollers 20 extend in the left-right direction; the top parts of the front upper roller 19 and the rear upper roller 19 are provided with a sealing rubber plate 17, the front end of the sealing rubber plate 17 bypasses the front side of the front upper roller 19 and the rear side of the front lower roller 20 and extends forwards from the bottom of the front lower roller 20, the rear end of the sealing rubber plate 17 bypasses the rear side of the rear upper roller 19 and the front side of the rear lower roller 20 and extends backwards from the bottom of the rear lower roller 20, and the sealing rubber plate 17 positioned outside the dust collection box body 9 is laid on the upper port of the flue gas duct 10; the bottom of the front side plate 902 and the bottom of the rear side plate 904 are both in top connection with the upper surface of the sealing rubber plate 17, the bottom edge of the left side plate 905 and the bottom edge of the right side plate 901 are both lower than the upper surface of the flue gas duct 10, the right side surface of the left side plate 905 is in seamless connection with the left side surface of the flue gas duct 10, and the left side surface of the right side plate 901 is in seamless connection with the right side surface of the flue gas duct 10.
The flue gas filter unit includes dust remover 11, dust remover 11 adopts pulsed cartridge dust remover 11, and the import of dust remover 11 communicates pipeline 16, and discharge valve 13 is installed to the dust exhaust mouth department of dust remover 11, and the dust exhaust mouth below of dust remover 11 is provided with storage tank 12, and the air exit of dust remover 11 is connected with the exhaust duct, and the exit linkage of exhaust duct has centrifugal fan 14, and the gas outlet of centrifugal fan 14 is connected with exhaust stack 15. Installation and control of the dust separator 11 is also possible using means conventional in the art.
The filter cartridge arranged in the dust collector 11 is formed by folding and rolling a filter material, the filter material adopts polyester fiber non-woven fabric as base cloth, the dust facing surface of the base cloth is coated with silicate/polytetrafluoroethylene composite material, and the preparation method of the filter material specifically comprises the following steps:
(1) adding polyvinyl alcohol into water, stirring until the polyvinyl alcohol is dissolved, then adding silicate, stirring for 3min, and performing ultrasonic dispersion for 7min to obtain a silicate dispersion liquid; wherein, the adding amount of the polyvinyl alcohol in the water is 2g/L, and the adding amount of the silicate is 28 g/L;
(2) mixing the polytetrafluoroethylene dispersion emulsion with the silicate dispersion liquid obtained in the step (1) according to the weight ratio of 1: 7, stirring for 25min, and performing ultrasonic treatment for 25min to obtain a mixed emulsion;
(3) uniformly coating the mixed emulsion obtained in the step (2) on the surface of the base cloth by adopting a spraying or blade coating mode, wherein the coating thickness is 20 microns; drying and shaping by a tentering and drying shaping machine, and cooling to room temperature to obtain the filter material; wherein the drying temperature of the tentering drying setting machine is 190 ℃ and the setting speed is 6 m/min.
The raw materials used in the preparation steps are all common commercial products. Wherein the polyester fiber non-woven fabric is purchased from Guangzhou Wantao filtration equipment science and technology Limited company (model WT318) and has a fixed weight of 160g/m2The thickness is 0.3-0.35 mm; the polyvinyl alcohol is a three-dimensional brand 088-20 (model PVA 1788), the alcoholysis degree is 87.0-89.0%, the average polymerization degree is 1650-1850, the molecular weight is 72600-81400, and the particle size is 160 meshes; the polytetrafluoroethylene dispersion emulsion uses Jufulon brand JUFLON (brand JF-4DCD), the solid content is 58-62%, the surfactant content is 4.0-7.0%, and the viscosity is 20-40 multiplied by 10-3Pa.S; the silicate is selected from pulverized and sieved montmorillonite which is purchased from mineral processing factory in the morning of Ling shou county, has a particle size of 1250 meshes and a density of 1.6g/cm3。
The physical properties of the filter materials before and after the surface modification (silicate/polytetrafluoroethylene coating) of the polyester fiber non-woven fabric are detected, and the results are as follows: air permeability of the original polyester fiber non-woven fabric filter material is 200L/m2S, filtration accuracy 5 μm; after the surface of the mixed emulsion is coated, the air permeability is 140L/m2S, filtration accuracy 0.3. mu.m. A TOPAS ash-cleaning filter material test bench AFC-133 is adopted to test the performance of the filter material prepared by the invention, and the test adopts the following dust: 30% of standard dust (alumina) + 70% of metal dust (particle size of 0.3-20 μm), and test results: the filter material dust-facing side dust blocking cake forming time is 5 days, and the filtering efficiency is as follows: 99.9995 percent. When the dust removal device of the plasma cutting machine operates, the filtering air speed of the dust remover 11 is 0.8-1.2 m/min, the operation lasts for 6 months, and the performance of the filter material does not decline.
The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the present invention as claimed.
Claims (9)
1. A dust removal device of a plasma cutting machine comprises a cutting platform, a smoke collection unit and a smoke filtering unit, wherein the cutting platform comprises a material bracket and cutting machine rails arranged on the left side and the right side of the material bracket, and a main cutting machine is arranged on the cutting machine rails; the method is characterized in that: the smoke collecting unit comprises a smoke partition plate base arranged at the bottom of the material bracket, smoke air channels are arranged on the left side and the right side of the smoke partition plate base along the front-back direction, the rear end of each smoke air channel is closed, the front end of each smoke air channel is connected with a conveying pipeline, the upper end of each smoke air channel is open, and each smoke air channel is located on the inner side of the corresponding cutting machine track; a movable dust collection box which moves back and forth along the flue gas duct is arranged above the flue gas duct and comprises a dust collection box body, a connecting plate is arranged at the top of the dust collection box body, the other end of the connecting plate is arranged on the main machine of the cutting machine, and the movable dust collection box is connected with the main machine of the cutting machine through the connecting plate and moves synchronously with the main machine of the cutting machine; the bottom of the dust collection box body is open and is communicated with the flue gas duct, one side of the dust collection box body close to the flue baffle base is provided with an air inlet, the top in the dust collection box body is provided with two upper rolling shafts which correspond to each other in the front and back direction, the upper rolling shaft is positioned above the air inlet, two lower rolling shafts which correspond to each other in the front and the back are arranged at the bottom in the dust collecting box body, the upper rolling shaft and the lower rolling shaft extend along the left-right direction, the top parts of the front upper rolling shaft and the rear upper rolling shaft are provided with sealing rubber plates, the front end of the sealing rubber plate goes around the front side of the front side upper roller and the rear side of the front side lower roller and extends forwards from the bottom of the front side lower roller, the rear end of the sealing rubber plate bypasses the rear side of the rear side upper rolling shaft and the front side of the rear side lower rolling shaft and extends backwards from the bottom of the rear side lower rolling shaft, and the sealing rubber plate positioned outside the dust collection box is laid on the upper port of the flue gas duct; the flue gas filter unit includes the dust remover, the dust remover adopts pulsed cartridge filter, and the air intake intercommunication pipeline of dust remover, the discharge valve is installed to the dust exhaust mouth department of dust remover, and the dust exhaust mouth below of dust remover is provided with the storage case, and the air exit of dust remover is connected with exhaust pipe, and exhaust pipe's exit linkage has centrifugal fan, and centrifugal fan's gas outlet is connected with the exhaust chimney.
2. The plasma cutting machine dust removing device according to claim 1, characterized in that: the filter cartridge arranged in the dust remover is formed by folding and rolling a filter material, the filter material adopts polyester fiber non-woven fabric as base cloth, and the dust facing surface of the base cloth is coated with silicate/polytetrafluoroethylene composite material.
3. The plasma cutting machine dust removal device of claim 2, wherein the preparation method of the filter material comprises the following steps: (1) adding polyvinyl alcohol into water, stirring until the polyvinyl alcohol is dissolved, then adding silicate, stirring for 1-5 min, and performing ultrasonic dispersion for 5-10 min to obtain a silicate dispersion liquid; wherein the addition amount of the polyvinyl alcohol in the water is 0.15-5 g/L, and the addition amount of the silicate is 20-30 g/L;
(2) mixing the polytetrafluoroethylene dispersion emulsion with the silicate dispersion liquid obtained in the step (1) according to the weight ratio of 1: 2-11, stirring for 20-30 min, and performing ultrasonic treatment for 20-30 min to obtain a mixed emulsion; wherein the solid content of the polytetrafluoroethylene dispersion emulsion is 58-62%;
(3) and (3) uniformly coating the mixed emulsion obtained in the step (2) on the surface of the base cloth in a spraying or scraping coating mode, drying and shaping by using a tentering and drying shaping machine, and cooling to room temperature to obtain the filter material.
4. The plasma cutting machine dust removing device according to claim 3, characterized in that: and (4) coating the mixed emulsion on the surface of the base cloth in the step (3) to a thickness of 10-30 μm.
5. The plasma cutting machine dust removing device according to claim 3, characterized in that: in the step (3), the drying temperature of the tentering drying and setting machine is 150-250 ℃, and the setting speed is 5-8 m/min.
6. The plasma cutting machine dust removing device according to any one of claims 3 to 5, characterized in that: the silicate is selected from pulverized and sieved mica and/or montmorillonite.
7. The plasma cutting machine dust removing device according to claim 1, characterized in that: the flue baffle base includes the bottom plate, and even interval is fixed with a plurality of vertical baffles on the bottom plate, the baffle all extends along left right direction.
8. The plasma cutting machine dust removing device according to claim 1, characterized in that: the box that gathers dust is formed by preceding curb plate, roof, posterior lateral plate, left side board and the seamless concatenation of right side board, the bottom of preceding curb plate and the bottom of posterior lateral plate all connect with the upper surface looks top of sealed offset plate, the base of left side board and the base of right side board all are less than the upper surface in flue gas wind channel, and the right flank of left side board and the seamless butt joint of left surface in flue gas wind channel, the left surface of right side board and the seamless butt joint of right flank in flue gas wind channel.
9. The plasma cutting machine dust removing device according to claim 8, characterized in that: the longitudinal section of the dust collection box body is an isosceles trapezoid without a bottom edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011256149.8A CN112657286A (en) | 2020-11-11 | 2020-11-11 | Dust removal device of plasma cutting machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011256149.8A CN112657286A (en) | 2020-11-11 | 2020-11-11 | Dust removal device of plasma cutting machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113457334A (en) * | 2021-05-27 | 2021-10-01 | 驻马店大力天骏专用汽车制造有限公司 | Welding fume collecting and purifying equipment |
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