阅读说明：本技术 一种用于机器人焊接车间的移动式焊烟净化器 (Movable welding fume purifier for robot welding workshop ) 是由 张永胜 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种用于机器人焊接车间的移动式焊烟净化器,涉及焊烟处理技术领域,包括机体,所述机体的顶端的中部安装有烟罩,所述机体的一端转动连接有拉手架,所述机体的内部的上侧安装有一次净化装置,所述机体的内侧靠近抽风机的一端安装有二次净化装置。本发明通过一次净化装置过滤焊烟中的固体小颗粒,通过二次净化装置清除焊烟中的有毒有害气体,通过罐壳和罐盖内侧的定位柱分别固定在相对应的定位槽内,从而保持了滤芯的稳定性,同时,又使滤芯在罐壳的内部形成悬空状态,利于烟气的流通,通过拉着拉手架,方便移动设备,且可以调节拉手架的长度,方便不同的工人使用,在不需要移动设备时,可以把拉手架折叠起来。(The invention discloses a movable welding fume purifier for a robot welding workshop, which relates to the technical field of welding fume treatment and comprises a machine body, wherein a fume hood is arranged in the middle of the top end of the machine body, one end of the machine body is rotatably connected with a handle frame, a primary purifying device is arranged on the upper side inside the machine body, and a secondary purifying device is arranged at one end, close to an exhaust fan, of the inner side of the machine body. The filter element is suspended in the tank shell, smoke circulation is facilitated, the handle frame is pulled, equipment is convenient to move, the length of the handle frame can be adjusted, the handle frame is convenient for different workers to use, and the handle frame can be folded when the equipment does not need to be moved.)

1. A movable welding fume purifier for a robot welding workshop comprises a machine body (1) and is characterized in that a fume hood (11) is installed in the middle of the top end of the machine body (1), pull rings (12) are fixedly connected to two sides, close to the fume hood (11), of the top end of the machine body (1), one end of the machine body (1) is rotatably connected with a handle frame (2), a fume exhaust port (3) is arranged on the inner side, close to the handle frame (2), of one end of the machine body (1), a liquid discharge port (4) is arranged at the lower end, close to the fume exhaust port (3), of one end of the machine body (1), universal wheels (5) are mounted at four corners of the bottom end of the machine body (1), a second box door (10) is rotatably connected to the upper side of one end of the front side of the machine body (1), and a first box door (9) is rotatably connected to the lower end, close to the second, primary purification device (8) is installed to the upside of the inside of organism (1), and air exhauster (7) are installed to the downside of the inside of organism (1), secondary purification device (6) are installed to the inboard one end that is close to air exhauster (7) of organism (1).

2. The mobile welding fume purifier for robot welding workshop according to claim 1, it is characterized in that the primary purification device (8) comprises a tank shell (81), one end of the tank shell (81) is fixedly connected with a tank cover (85) through a flange plate, and the other end of the tank shell (81) is fixedly connected with a primary smoke outlet pipe (82), one end of the inner sides of the tank shell (81) and the tank cover (85) is fixedly connected with a group of positioning columns (86), and the inner parts of the tank shell (81) and the tank cover (85) are positioned between the two groups of positioning columns (86) and are provided with filter elements (83) together, one end of the tank cover (85) is fixedly connected with a primary smoke inlet pipe (87), and the other end of the tank cover (85) is fixedly connected with an air duct (84) close to the inner side of the corresponding positioning column (86), and the air duct (84) is positioned at the inner side of the filter element (83).

3. The movable welding fume purifier for the robot welding shop as recited in claim 2, wherein the filter element (83) comprises a filter paper cylinder (831), a first fixed cover (832) is sleeved at one end of the filter paper cylinder (831), a second fixed cover (834) is sleeved at the other end of the filter paper cylinder (831), an inner threaded shell (833) is fixedly connected to the inner side of the first fixed cover (832), a flower tube (836) is fixedly connected to the inner side of the second fixed cover (834), an outer threaded groove (837) is formed in one end of the flower tube (836), and a group of positioning grooves (835) are formed in the outer sides of the first fixed cover (832) and the second fixed cover (834).

4. The mobile welding fume purifier for the robot welding workshop, according to claim 3, characterized in that the internal thread shell (833), the flower tube (836) and the external thread groove (837) are all located inside the filter paper cylinder (831), the two sets of positioning columns (86) are respectively embedded inside the corresponding positioning grooves (835), the air duct (84) sequentially penetrates through the internal sides of the internal thread shell (833), the external thread groove (837) and the flower tube (836), and the internal thread shell (833) and the flower tube (836) are connected in a meshed manner.

5. The mobile welding fume purifier for the robot welding workshop according to claim 1, characterized in that the secondary purification device (6) comprises a purification box (61), a liquid outlet pipe (65) is arranged at the lower end of one end of the purification box (61), a liquid feeding pipe (63) is arranged at the rear side of the top end of the purification box (61), a secondary smoke outlet pipe (62) is arranged at one side of the top end of the purification box (61), a secondary smoke inlet pipe (64) is arranged at the other side of the top end of the purification box (61) in a penetrating manner, and the lower end of the secondary smoke inlet pipe (64) is embedded into the lower end of the interior of the purification box (61).

6. The mobile welding fume purifier for the robot welding shop is characterized in that the primary fume outlet pipe (82) is connected with an input end of an exhaust fan (7), the secondary fume inlet pipe (64) is connected with an output end of the exhaust fan (7), the primary fume inlet pipe (87) is connected with a fume hood (11), the fume exhaust port (3) is fixedly connected with the secondary fume outlet pipe (62), the fume exhaust port (4) is fixedly connected with a fume outlet pipe (65), and a rear end of the liquid feeding pipe (63) penetrates through the inner side of the machine body (1).

7. The mobile welding fume purifier for the robot welding workshop according to claim 1, characterized in that the fume hood (11) comprises a housing (111), a first rotating joint (113) is rotatably connected to the top end of the housing (111), a handle (112) is fixedly connected to the front side of the upper end of the housing (111), a communicating pipe (115) is rotatably arranged at the top end of the first rotating joint (113), a second rotating joint (114) is rotatably sleeved at the top end of the communicating pipe (115), an elbow (116) is rotatably arranged at one end of the second rotating joint (114), and the first rotating joint (113) and the second rotating joint (114) have the same structure.

8. The mobile welding fume purifier for robot welding workshop according to claim 7,

First rotary joint (113) include first sleeve (1131), one end fixedly connected with barb type bayonet socket (1132) of first sleeve (1131), card shell (1133) have been cup jointed in the outside of barb type bayonet socket (1132), the one end fixedly connected with second sleeve (1134) of card shell (1133), the inboard structure of card shell (1133) is opposite with the outside of barb type bayonet socket (1132), and the one-to-one.

9. The mobile welding fume purifier for robot welding workshop as recited in claim 1, wherein said mobile welding fume purifier is characterized in that

The handle frame (2) comprises outer sleeves (21), the outer sleeves (21) are provided with two, the middle of the outer side of each outer sleeve (21) is rotatably connected with a connecting rod (24), hand-screwed bolts (22) are embedded into the upper ends of the outer sides of each outer sleeve (21), and inner sliding rods (23) are embedded into the top ends of the two outer sleeves (21).

10. the mobile welding fume purifier for robot welding shop of claim 9 characterized by that

The outer sleeve (21) is fixedly connected with the inner sliding rod (23) through a hand-screwed bolt (22), and the bottom end of the outer sleeve (21) and one end of the connecting rod (24) are rotatably connected with the machine body (1) through hinges.

Technical Field

The invention relates to the technical field of welding fume treatment, in particular to a movable welding fume purifier for a robot welding workshop.

Background

In the process of robot welding, a large amount of welding fume is produced, the welding fume is a very complex substance, more than 20 elements are found in the fume, the most content of the elements is Fe, Ca, Na and the like, and Si, Al, Mn, Ti, Cu and the like are added, the components of toxic and harmful gases in the welding fume are mainly CO, CO2, O3, NOX, CH4 and the like, the environment of a welding workshop is seriously influenced, the physical and mental health of workers is threatened, and therefore the welding fume must be treated to reach the emission standard.

chinese patent discloses a high-efficient portable welding cigarette clarifier (grant No. CN 206934932U), this patent technique can carry out the filter effect to the smoke and dust, and be equipped with the pulse blowback device, can carry out the blowback dust removal to the filter core, but can't filter the poisonous and harmful gas in the smoke and dust, and inconvenient mobile device, chinese patent discloses a novel portable welding cigarette clarifier (grant No. CN 206950862U), this patent technique passes through the setting of lid, can close partial active carbon air outlet, realize the air output of control active carbon air outlet, according to different environment, improve or reduce the active carbon air output, but its purifying effect is not good, cause easily that the welding cigarette is outer leisurely, stability is not high. Accordingly, one skilled in the art provides a mobile welding fume purifier for a robotic welding shop to address the problems set forth in the background above.

Disclosure of Invention

The invention aims to provide a movable welding fume purifier for a robot welding workshop, which aims to solve the problems that toxic and harmful gases in fume cannot be filtered, the device is inconvenient to move, the purifying effect is poor, welding fume is easy to escape and the stability is low in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a portable welding fume purifier for robot welding shop, includes the organism, the mid-mounting on the top of organism has the petticoat pipe, and the top of organism is close to the equal fixedly connected with handle ring in both sides of petticoat pipe, the one end of organism is rotated and is connected with the handle frame, and the inboard that the one end of organism is close to the handle frame is provided with the exhaust port, the one end of organism is close to the lower extreme of exhaust port and is provided with the leakage fluid dram, and the four corners of the bottom of organism all installs the universal wheel, the upside of the one end of the front side of organism is rotated and is connected with the second chamber door, and the lower extreme that the front side of organism is close to the second chamber door rotates and is connected with first chamber door, purifier is installed once to the upside of the inside of organism, and the air exhauster is installed to the downside.

As a further scheme of the invention: a purifier includes the tank shell, the flange dish fixedly connected with cover is passed through to the one end of tank shell, and the other end fixedly connected with of tank shell once goes out the tobacco pipe, a set of reference column of the equal fixedly connected with of one end of the inboard of tank shell and cover, and the inside of tank shell and cover is located and is provided with the filter core between two sets of reference columns jointly, the one end fixed connection of cover has once advances the tobacco pipe, and the inboard fixedly connected with air duct that the other end of cover is close to corresponding reference column, the air duct is located the inboard of filter core.

As a still further scheme of the invention: the filter element comprises a filter paper cylinder, a first fixing cover is sleeved at one end of the filter paper cylinder, a second fixing cover is sleeved at the other end of the filter paper cylinder, an inner thread shell is fixedly connected to the inner side of the first fixing cover, a flower tube is fixedly connected to the inner side of the second fixing cover, an outer thread groove is formed in one end of the flower tube, and a set of positioning grooves are formed in the outer sides of the first fixing cover and the second fixing cover.

As a still further scheme of the invention: the inner thread shell, the floral tube and the outer thread groove are all located inside the filter paper cylinder, the two groups of positioning columns are embedded into the inner sides of the corresponding positioning grooves respectively, the air guide tube penetrates through the inner sides of the inner thread shell, the outer thread groove and the floral tube in sequence, and the inner thread shell is meshed with the floral tube.

As a still further scheme of the invention: the secondary purifier includes the purifying box, the lower extreme of the one end of purifying box is provided with the drain pipe, and the rear side on the top of purifying box is provided with the liquid feeding pipe, one side on the top of purifying box is provided with the secondary and goes out the tobacco pipe, and the opposite side on the top of purifying box runs through and is provided with the secondary and advances the tobacco pipe, the lower extreme of the inside that the secondary advances the tobacco pipe is embedded into the purifying box.

As a still further scheme of the invention: the secondary smoke inlet pipe is connected with the output end of the exhaust fan, the primary smoke inlet pipe is connected with the smoke hood, the smoke outlet is fixedly connected with the secondary smoke outlet pipe, the liquid discharge outlet is fixedly connected with the liquid outlet pipe, and the rear end of the liquid feeding pipe penetrates through the inner side of the machine body.

as a still further scheme of the invention: the petticoat pipe includes the housing, the top of housing is rotated and is connected with first rotary joint, and the front side fixedly connected with handle of the upper end of housing, first rotary joint's top is rotated and is provided with communicating pipe, communicating pipe's top is rotated and has been cup jointed second rotary joint, second rotary joint's one end embedding is rotated and is provided with the return bend, first rotary joint is the same with second rotary joint's structure.

As a still further scheme of the invention: first rotary joint includes first sleeve, first telescopic one end fixedly connected with barb type bayonet socket, the card shell has been cup jointed in the outside of barb type bayonet socket, the one end fixedly connected with second sleeve of card shell, the inboard structure of card shell is opposite with the outside of barb type bayonet socket to the one-to-one.

as a still further scheme of the invention: the handle frame includes the outer tube, the outer tube is provided with two altogether, and the middle part in the outside of every outer tube all rotates and is connected with the connecting rod, the upper end in the outside of every outer tube all imbeds and is provided with the hand and twists the bolt, and the top of two outer tubes imbeds jointly and is provided with interior slide bar.

As a still further scheme of the invention: the outer sleeve and the inner slide rod are fixedly connected through a hand-screwed bolt, and the bottom end of the outer sleeve and one end of the connecting rod are rotatably connected with the machine body through hinges.

compared with the prior art, the invention has the beneficial effects that:

1. Solid small particles in welding smoke are filtered through a primary purification device, toxic and harmful gas in the welding smoke is removed through a secondary purification device, the filtered gas is discharged from a smoke outlet, the purpose of purifying the welding smoke is achieved, the positioning columns on the inner sides of the tank shell and the tank cover are respectively fixed in corresponding positioning grooves, the stability of the filter element is kept, shaking of the filter element under the impact of smoke is avoided, meanwhile, the filter element forms a suspension state in the tank shell, the circulation of the smoke is facilitated, the filtering effect is improved, through the filter element, the first fixing cover and the second fixing cover are arranged into a separating structure, the filter element is integrally installed together through the external thread groove and the internal thread shell, the filter element is used for a period of time, convenience is brought to the replacement of the filter element, and convenience is brought to users.

2. The handle frame is pulled, the whole equipment can be moved through the universal wheels, when the length of the inner sliding rod needs to be adjusted, the inner sliding rod can slide in the outer sleeve, and after the height is adjusted to be proper, the outer sleeve and the inner sliding rod can be locked through screwing the bolt by hands, so that the whole equipment can be moved by an convenience user, when the mobile equipment is not needed, the outer sleeve and the connecting rod can be folded, the space is saved, and the practicability of the equipment is improved.

Drawings

FIG. 1 is a schematic structural view of a mobile welding fume purifier for a robotic welding shop;

FIG. 2 is an exploded view of a primary cleaning apparatus in a mobile welding fume purifier for use in a robotic welding shop;

FIG. 3 is an exploded view of a filter cartridge in a mobile welding fume purifier for use in a robotic welding shop;

FIG. 4 is a schematic structural diagram of a secondary purification device in a mobile welding fume purifier for a robot welding workshop;

FIG. 5 is a schematic structural diagram of a smoke hood in a mobile welding smoke purifier for a robot welding workshop;

FIG. 6 is an exploded view of a first rotary joint in a mobile welding fume purifier for use in a robotic welding shop;

FIG. 7 is a schematic structural diagram of a handle frame in a mobile welding fume purifier for a robot welding shop;

fig. 8 is an assembly view of a mobile welding fume purifier for use in a robotic welding shop.

In the figure: 1. a body; 2. a handle frame; 21. an outer sleeve; 22. screwing the bolt by hand; 23. an inner slide bar; 24. a connecting rod; 3. a smoke outlet; 4. a liquid discharge port; 5. a universal wheel; 6. a secondary purification device; 61. a purification box; 62. secondary smoke outlet pipes; 63. a liquid feeding pipe; 64. a secondary smoke inlet pipe; 65. a liquid outlet pipe; 7. an exhaust fan; 8. a primary purification device; 81. a can shell; 82. a primary smoke outlet pipe; 83. a filter element; 831. a filter paper cartridge; 832. a first fixed cover; 833. an internally threaded shell; 834. a second stationary cover; 835. positioning a groove; 836. a floral tube; 837. an outer thread groove; 84. an air duct; 85. a can lid; 86. a positioning column; 87. a primary smoke inlet pipe; 9. a first door; 10. a second door; 11. a smoke hood; 111. a housing; 112. a handle; 113. a first rotary joint; 1131. a first sleeve; 1132. a barb type bayonet; 1133. clamping a shell; 1134. a second sleeve; 114. a second rotary joint; 115. a communicating pipe; 116. bending the pipe; 12. handle ring.

Detailed Description

Referring to fig. 1 to 8, in an embodiment of the present invention, a movable welding fume purifier for a robot welding workshop includes a machine body 1, a fume hood 11 is installed in the middle of the top end of the machine body 1, pull rings 12 are fixedly connected to both sides of the top end of the machine body 1 close to the fume hood 11, a handle frame 2 is rotatably connected to one end of the machine body 1, a fume exhaust port 3 is arranged at one end of the machine body 1 close to the inner side of the handle frame 2, a fluid discharge port 4 is arranged at one end of the machine body 1 close to the lower end of the fume exhaust port 3, universal wheels 5 are installed at four corners of the bottom end of the machine body 1, a second box door 10 is rotatably connected to the upper side of one end of the front side of the machine body 1, a first box door 9 is rotatably connected to the lower end of the front side of the machine body 1 close to the second box door 10, a primary purification device 8 is installed at the upper side of the interior.

in fig. 2: primary purification device 8 includes tank shell 81, ring flange fixedly connected with cover 85 is passed through to tank shell 81's one end, tobacco pipe 82 is once gone out to tank shell 81's other end fixedly connected with, a set of reference column 86 of the equal fixedly connected with of one end of tank shell 81 and cover 85's inboard, tank shell 81 and cover 85's inside is located and is provided with filter core 83 between two sets of reference columns 86 jointly, tobacco pipe 87 is once advanced to tank shell 85's one end fixedly connected with, the other end of cover 85 is close to the inboard fixedly connected with air duct 84 of corresponding reference column 86, air duct 84 is located the inboard of filter core 83, thereby can filter the solid tiny particle in the welding cigarette, condition is provided for subsequent processing.

In fig. 3: the filter core 83 includes the filter paper section of thick bamboo 831, the one end of filter paper section of thick bamboo 831 has cup jointed first fixed lid 832, the other end of filter paper section of thick bamboo 831 has cup jointed the fixed lid 834 of second, the inboard fixedly connected with internal thread shell 833 of first fixed lid 832, the inboard fixedly connected with floral tube 836 of the fixed lid 834 of second, the external thread groove 837 has been seted up to the one end of floral tube 836, a set of constant head tank 835 has all been seted up in the outside of first fixed lid 832 and the fixed lid 834 of second, thereby can filter the solid tiny particle who welds in the cigarette high-efficiently, make gaseous outside escape by the inboard of filter paper section of thick bamboo 831.

In fig. 2 and 3: internal thread shell 833, floral tube 836 and external screw thread groove 837 all are located the inside of filter paper section of thick bamboo 831, two sets of reference columns 86 imbed respectively in the inboard of corresponding constant head tank 835, air duct 84 runs through internal thread shell 833 in proper order, the inboard of external screw thread groove 837 and floral tube 836, internal thread shell 833 and floral tube 836 meshing are connected, thereby can keep the stability of filter core 83, avoided filter core 83 to take place to rock under the impact of flue gas, and simultaneously, make filter core 83 form unsettled state in the inside of pot shell 81 again, do benefit to the circulation of flue gas.

In fig. 4: the secondary purification device 6 comprises a purification box 61, a liquid outlet pipe 65 is arranged at the lower end of one end of the purification box 61, a liquid adding pipe 63 is arranged at the rear side of the top end of the purification box 61, a secondary smoke outlet pipe 62 is arranged at one side of the top end of the purification box 61, a secondary smoke inlet pipe 64 is arranged at the other side of the top end of the purification box 61 in a penetrating manner, the lower end of the secondary smoke inlet pipe 64 is embedded into the lower end of the interior of the purification box 61, a certain amount of alkaline solution is added into the purification box 61, and therefore toxic and harmful gases in welding smoke can be filtered.

in fig. 1, 2 and 4: the primary smoke outlet pipe 82 is connected with the input end of the exhaust fan 7, the secondary smoke inlet pipe 64 is connected with the output end of the exhaust fan 7, the primary smoke inlet pipe 87 is connected with the smoke hood 11, the smoke outlet 3 is fixedly connected with the secondary smoke outlet pipe 62, the liquid discharge outlet 4 is fixedly connected with the liquid outlet pipe 65, the rear end of the liquid feeding pipe 63 penetrates through the inner side of the machine body 1, and welding smoke can be filtered and purified sequentially through the primary purification device 8 and the secondary purification device 6 through the exhaust fan 7.

in fig. 5: the smoke hood 11 comprises a hood shell 111, a first rotating joint 113 is rotatably connected to the top end of the hood shell 111, a handle 112 is fixedly connected to the front side of the upper end of the hood shell 111, a communicating pipe 115 is rotatably arranged at the top end of the first rotating joint 113, a second rotating joint 114 is rotatably sleeved at the top end of the communicating pipe 115, an elbow 116 is rotatably arranged at one end of the second rotating joint 114, and the first rotating joint 113 and the second rotating joint 114 are identical in structure, so that the direction of the hood shell 111 can be adjusted at any angle, the hood shell 111 is in an optimal state, and smoke generated during welding can be fully absorbed.

In fig. 6: first rotary joint 113 includes first sleeve 1131, and the one end fixedly connected with barb type bayonet 1132 of first sleeve 1131, the card shell 1133 has been cup jointed in the outside of barb type bayonet 1132, and the one end fixedly connected with second sleeve 1134 of card shell 1133, and the inboard structure of card shell 1133 is opposite with the outside of barb type bayonet 1132 to the one-to-one correspondence, thereby improved the stability that first rotary joint 113 connects, prevent when rotating housing 111, first rotary joint 113 takes place to drop.

In fig. 7: the handle frame 2 comprises outer sleeves 21, the number of the outer sleeves 21 is two, the middle part of the outer side of each outer sleeve 21 is rotatably connected with a connecting rod 24, the upper end of the outer side of each outer sleeve 21 is embedded with a hand-screwed bolt 22, and the top ends of the two outer sleeves 21 are embedded with an inner sliding rod 23, so that the length of the inner sliding rod 23 can be adjusted, and the device is convenient for users with different heights to move.

In fig. 7: the outer sleeve 21 and the inner slide bar 23 are fixedly connected through a hand-screwed bolt 22, so that after the length of the inner slide bar 23 is adjusted, the outer sleeve 21 and the inner slide bar 23 are fixed together, the bottom end of the outer sleeve 21 and one end of the connecting rod 24 are rotatably connected with the machine body 1 through hinges, and the outer sleeve 21 and the connecting rod 24 can be folded when the mobile equipment is not needed.

The working principle of the invention is as follows: firstly, closing the liquid outlet 4, adding an alkaline solution into the purification box 61 from the liquid feeding pipe, wherein the height of the alkaline solution is about 2/3 of the height of the purification box 61, then holding the handle 112 by hand, pulling the housing 111, rotating the first rotating joint 113 and the second rotating joint 114, so as to move the housing 111 to the upper end of the welding position, then opening the exhaust fan 7, sucking the generated smoke from the lower end of the housing 111 when the exhaust fan welds, allowing the smoke to pass through the first rotating joint 113, the communicating pipe 115, the second rotating joint 114 and the elbow pipe 116 in sequence, then allowing the smoke to enter the primary purification device 8, filtering the solid particles in the welding smoke through the filter element 83, extracting the filtered gas from the primary smoke outlet pipe 82 by the exhaust fan 7, delivering the filtered gas into the purification box 61 through the secondary smoke inlet pipe 64, absorbing the toxic and harmful gas in the smoke by the alkaline solution in the purification box 61, the welding fume escapes upwards and is discharged to the outside through the secondary fume outlet pipe 62 and the fume outlet 3, so that the welding fume in a welding workshop of the robot is purified, when the welding fume purifier needs to be moved, the inner sliding rod 23 is rotated to one side away from the machine body 1, the bottom end of the outer sleeve 21 and two ends of the connecting rod 24 are both rotated, the outer sleeve 21 and the connecting rod 24 form a certain angle with the machine body 1, so that the handle frame 2 can be pulled, the whole equipment is moved through the universal wheel 5, when the length of the inner sliding rod 23 needs to be adjusted, the inner sliding rod 23 can be slid in the outer sleeve 21 by rotating the hand screwing bolt 22 anticlockwise, after the proper height is adjusted, the outer sleeve 21 and the inner sliding rod 23 are locked, and therefore a user can conveniently move the whole equipment;

After the tank shell 81 and the tank cover 85 are fixed together, the positioning columns 86 on the inner sides of the tank shell 81 and the tank cover 85 are respectively fixed in the corresponding positioning grooves 835, so that the stability of the filter element 83 is maintained, the filter element 83 is prevented from shaking under the impact of smoke, and meanwhile, the filter element 83 is suspended in the tank shell 81 to facilitate the circulation of the smoke;

In the process of the welding fume entering the primary purifying device 8, the welding fume firstly enters the floral tube 836 through the primary fume inlet tube 87 and the air duct 84, then flows out of the outer wall of the floral tube 836, enters the inside of the filter paper cylinder 831, solid small particles in the welding fume are intercepted inside the filter paper cylinder 831, and the welding fume escapes from the outside of the filter paper cylinder 831, enters the inside of the tank shell 81 and is extracted out of the primary fume outlet tube 82 through the exhaust fan 7.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.