A cantilever welding fume purification device

Abstract

The present invention discloses a cantilever welding fume purification device, comprising a rigid first air duct and a second air duct, a switching assembly installed at a docking section, the switching assembly consisting of a plurality of filter tubes, a filter assembly installed inside the filter tube, a rotating shaft is provided between the upper arc sides corresponding to the first end plate and the second end plate, for sleeve connection, so that the switching assembly corresponding to the rotating shaft rotates and cooperates as a whole, and is used to switch the corresponding filter tube to connect the first air duct and the second air duct docking section. The filter assembly can be switched without stopping the machine, the filter assembly is a filter tube, and the filter tube and the rotary disk at the end form an integral switching assembly structure. When the filter hole corresponding to the filter assembly is overloaded, the filter tube connected to the first air duct and the second air duct is replaced by rotating the switching assembly, so as to realize an uninterrupted filtering method, which greatly improves the work efficiency and saves working hours.

Description

Technical Field

[0001] The invention belongs to the technical field of dust removal and environmental protection equipment, and in particular relates to a cantilever welding fume purification device. Background Art

[0002] A large amount of harmful welding fumes will be generated during the welding process in the workshop. How to capture and filter these fumes in time to reduce air pollution and improve the breathing environment of workers, so as to reduce the risk of occupational diseases such as pneumoconiosis; at the same time, it can adapt to the welding needs of workpieces of different heights and improve the efficiency of welding work.

[0003] The dust removal welding arm is a device designed for welding operations. Its main function is to achieve instant purification and filtration of smoke and dust during the welding process. Its dust removal equipment is installed on the welding workstation and can efficiently capture and remove harmful smoke and dust generated during the welding process, thereby protecting the health of operators and reducing pollution to the environment. The dust removal welding arm is simple to operate, flexible and convenient. It can be raised and lowered, rotated, dusted, and welded. It has the advantages of small footprint, high filtration accuracy, and low noise.

[0004] The corresponding dust removal welding arm is currently available, and the tail of the welding arm is a negative pressure suction device, which is used to generate a negative pressure suction effect, and absorb the smoke generated by welding through a pipe. The negative pressure suction device is also equipped with a filter device, which is used to capture fine particles, so that the smoke meets the emission standards after being discharged. The workshop processing and welding are carried out in multiple places at the same time, and the corresponding filter device will soon accumulate a lot of dust, thereby clogging the filter holes, affecting the passage of airflow, forming an obstacle, and weakening the suction force. If the problem of weakened suction force is to be improved, the filter membrane needs to be replaced, and the replacement of the filter membrane requires shutdown, which greatly affects the processing efficiency. Therefore, the present invention is improved on the basis of the existing dust removal welding arm, and a switchable filter structure is prepared. When the filter membrane reaches the scrap standard, the filter mechanism can be switched without stopping the machine, thereby improving the processing production efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a cantilever welding fume purification device, which is improved on the basis of the existing dust removal welding arm and prepares a switchable filtering structure. When the filter membrane reaches the scrap standard, the filtering mechanism can be switched without stopping the machine, thereby improving the processing production efficiency.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] A cantilever welding fume purification device comprises a rigid first air duct and a second air duct, wherein the first air duct and the second air duct are coaxially arranged, and a switching assembly is installed at the corresponding docking section;

[0008] The switching assembly is composed of a plurality of filter tubes, which are uniformly arranged around the same sleeve, and the corresponding pipe ends of the filter tubes are respectively fixed to the first rotary disk and the second rotary disk, and the first rotary disk and the second rotary disk are both provided with perforations at the positions corresponding to the pipe openings of the filter tubes, and a filter assembly is installed inside the filter tube, and the filter assembly can be detachably installed on the corresponding filter tube;

[0009] The first and second end plates are fixed to the corresponding butt-joint ends of the first and second air guide tubes, respectively. The first and second end plates are both elliptical structures. A rotating shaft is provided between the corresponding upper arc sides of the first and second end plates for sleeves to be sleeved, so that the switching assembly rotates and cooperates with the corresponding rotating shaft as a whole, so as to switch the corresponding filter tube to connect the first and second air guide tube butt-joint sections.

[0010] The other end of the second air guide pipe is connected to the exhaust main pipe through the guide assembly, and the other end of the first air guide pipe is connected to the air collecting hood through the first corrugated pipe;

[0011] A rigid welding gas pipe is installed below the first and second air guide pipes. One end of the welding gas pipe is connected to the welding gun through a first hose, and the other end of the welding gas pipe is connected to the main machine through a second hose.

[0012] Furthermore, the first air guide tube and the second air guide tube are coaxially arranged with the rotating shaft, and arc-shaped guide portions are provided between the first air guide tube and the first end plate and between the second air guide tube and the second end plate.

[0013] Furthermore, the welding gas pipe passes through and is fixed on the lower arc side of the first end plate, the second end plate has a first positioning hole for the welding gas pipe to pass through, one end of the rotating shaft is fixed on the upper arc side of the second end plate, the arc side of the first end plate has a second positioning hole for the end of the rotating shaft to pass through, the part of the rotating shaft passing through the second positioning hole is a threaded part, which is fixed by a nut.

[0014] Furthermore, the first end plate and the second end plate are both provided with circular sealing grooves at positions corresponding to the pipe openings for installing an annular sealing ring, and the cross-section of the sealing groove is a semicircular arc.

[0015] Furthermore, a ball is installed on the first end plate, and a ball groove for installing the ball is provided on the sealing side corresponding to the first end plate. A spring is installed in the ball groove for resisting the ball so that the ball has an arc-shaped raised surface on the sealing side corresponding to the first end plate. The first rotary disk is provided with an arc-shaped groove at the position corresponding to the perforation for corresponding to the ball.

[0016] Furthermore, the filter tube is sleeved with a cotton filter layer, the filter layer is a tube structure, and the side wall is corrugated. The filter layer is sleeved on a tubular spring, one side of the tubular spring is sealed by an end cover, and a sealing ring is fixed on the other side, so that the filter layer has an open side corresponding to the sealing ring side, and a support ring is fixed at the position of the inner side wall of the filter tube corresponding to the pipe mouth, which is used to correspond to the sealing ring and form a limiting support.

[0017] The end cover is fixed with a clamping strip along the radial direction, and the two sides of the clamping strip extend beyond the edge of the end cover. The inner wall of the filter tube corresponding to the pipe mouth position has a ring-shaped fixed limit block, and a groove body for the clamping strip to be inserted is formed between adjacent limit blocks. The limit block has a limit groove for the end of the clamping strip to be inserted into.

[0018] Furthermore, the other end of the second air duct is supported by a support column between the pipe opening and the ground, the lower end of the support column is fixed with a base, the upper end is equipped with a steering arm, one side of the steering arm is rotatably connected to the upper side of the support column, so that the horizontal angle of the steering arm is adjustable, and the other side is provided with a fixed plate, a turntable is installed on the inner side of the fixed plate, a roller is fixed in the center of the turntable, and a roller hole for installing the roller is opened in the center of the fixed plate, the end of the second air duct is fixed to the turntable, and the vertical angle is adjusted by rotating the turntable and the fixed plate.

[0019] The steering arm is hollow inside to form an air flow channel, and air holes connected to the air flow channel are arranged on both sides of the steering arm. The second air guide pipe is connected to the single air hole through a second bellows, and the other air hole is connected to the exhaust main pipe through a third bellows.

[0020] The rotating disk is provided with a first point hole, and the fixed disk is provided with a plurality of second point holes around the center. The rotating disk is rotated to align the first point hole with the corresponding second point hole, and the holes are positioned and fixed by bolts.

[0021] The present invention has the following beneficial effects: mainly, the filter assembly can be switched without stopping the machine, the filter assembly is a filter tube, the filter tube and the rotary disk at the end form an integrated switching assembly structure, the smoke generated during welding is sucked in through the gas collecting hood, passes through the filter tube during the air guide process, and the filter assembly in the filter tube intercepts the smoke, when the filter hole corresponding to the filter assembly is overloaded, the filter tube connected to the first air guide tube and the second air guide tube is replaced by rotating the switching assembly, so as to realize an uninterrupted filtering mode, and after rotating the switching assembly, the loaded filter tube mouth is exposed, and the filter assembly can be replaced, which is convenient for the next switch. The work efficiency is greatly improved and the working time is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0023] Figure 1 : Schematic diagram of the overall combined structure of the present invention.

[0024] Figure 2 : Schematic diagram of the structure of the switching component after disassembly of the present invention.

[0025] Figure 3 : Schematic diagram of the structure of the first air duct after disassembly of the present invention.

[0026] Figure 4 : Schematic diagram of the structure after the first airway duct and the second airway duct are separated.

[0027] Figure 5 : Schematic diagram of the partially enlarged structure of the first end plate of the present invention.

[0028] Figure 6 : Schematic diagram of the filter tube cross section and filter layer combination structure of the present invention.

[0029] Figure 7 : Schematic diagram of the steering arm structure of the present invention.

[0030] In the accompanying drawings, the components represented by the reference numerals are as follows: first air guide pipe 1, second air guide pipe 2, switching assembly 3, filter pipe 30, sleeve 33, first rotary disc 31, second rotary disc 32, first end plate 11, second end plate 21, rotating shaft 22, exhaust main pipe 7, first bellows 51, gas collecting hood 5, welding gas pipe 4, first hose 41, welding gun 43, second hose 42, arc guide portion 12, sealing groove 1 14. Sealing ring--115. Ball--112. Ball groove--111. Spring--113. Arc groove--311. Filter layer--8. Tubular spring--81. End cover--82. Sealing ring--83. Support ring--34. Card strip--84. Limit block--35. Support column--9. Steering arm--6. Fixed plate--61. Turntable--23. Roller--24. Second bellows--52. Third bellows--53. First point hole--25. Second point hole--62. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] like Figure 1-3As shown: a cantilever welding fume purification device, comprising a rigid first air duct 1 and a second air duct 2, both of which are stainless steel pipes, the first air duct 1 and the second air duct 2 are coaxially arranged, and a switching assembly 3 is installed at the corresponding docking section;

[0033] The switching component 3 is composed of multiple filter tubes 30. The filter tubes 30 and the air guide tubes are both stainless steel tubes with the same caliber. The number of filter tubes is specifically four. The filter tubes 30 are evenly arranged around the same sleeve 33. The corresponding pipe ends of the filter tubes 30 are respectively fixed to the first rotary disk 31 and the second rotary disk 32. The first rotary disk 31 and the second rotary disk 32 are both provided with perforations at the positions corresponding to the pipe ends of the filter tubes 30. A filter assembly is installed inside the filter tube 30, and the filter assembly can be detachably installed on the corresponding filter tube 30; the rotary disk is circular, and a hole is opened at the position corresponding to the pipe end of the filter tube 30. The pipe end of the filter tube 30 has a flange structure, which is aligned with the perforation position of the rotary disk, and then welded to make the first rotary disk 31, the second rotary disk 32 and the filter tube 30 an integral structure. The filter tube 30 has a filter assembly inside, which is used to intercept smoke and dust in the air when the airflow passes through.

[0034] like Figure 2 As shown: the first air duct 1 and the second air duct 2 are respectively fixed with the first end plate 11 and the second end plate 21 at the corresponding butt-joint end pipe openings, and the first end plate 11 and the second end plate 21 are both elliptical structures. A rotating shaft 22 is provided between the corresponding upper arc sides of the first end plate 11 and the second end plate 21 for sleeve 33 to be sleeved, so that the switching component 3 can rotate and cooperate with the corresponding rotating shaft 22 as a whole, and can be used to switch the corresponding filter tube 30 to connect the first air duct 1 and the second air duct 2 butt-joint section; the first air duct 1, the second air duct 2 and the filter tube 30 have the same caliber, and when the switching component 3 is rotated, the corresponding filter tube 30 is connected to the first air duct 1 and the second air duct 2 to form a complete airflow duct.

[0035] The other end of the second air duct 2 is connected to the exhaust main pipe 7 through a guide assembly, and the other end of the first air duct 1 is connected to the gas collecting hood 5 through a first corrugated pipe 51; the guide assembly is used to adjust the direction of the second air duct 2. The first air duct 1 and the second air duct 2 are fixed by the rotating shaft 22 to form a whole. Under the action of the guide assembly, the position of the air duct is adjusted, and the adjustment mainly includes height adjustment and horizontal adjustment, so that the gas collecting hood 5 can accurately locate the welding position and accurately absorb the welding smoke.

[0036] A rigid welding gas pipe 4 is installed below the first gas pipe 1 and the second gas pipe 2. One end of the welding gas pipe 4 is connected to the welding gun 43 through the first hose 41, and the other end is connected to the main machine through the second hose 42. The main machine is also provided with a gas cylinder for filling shielding gas. The gas cylinder is connected to the welding gun 43 through a hose and the welding gas pipe 4, which is used to deliver shielding gas to the welding gun. The shielding gas is generally an inert gas, such as argon. The first hose 41 and the second hose 42 are rubber hoses, and their positions can be adjusted according to the welding point position of the welding gun 43. The first hose 41 corresponds to the position of the first gas pipe 1, and the second hose 42 corresponds to the position of the second gas pipe 2.

[0037] The present invention mainly can switch the filter assembly without stopping the machine. The filter assembly is a filter tube 30. The filter tube 30 and the rotary disk at the end form an integrated switch assembly 3 structure. The smoke generated during welding is sucked in through the gas hood 5 and passes through the filter tube 30 during the air guide process. The filter assembly in the filter tube 30 intercepts the smoke. When the filter hole corresponding to the filter assembly is overloaded, the filter tube 30 connected to the first air guide tube 1 and the second air guide tube 2 is replaced by rotating the switch assembly 3 to achieve an uninterrupted filtering method. After rotating the switch assembly 3, the loaded filter tube 30 is exposed, and the filter assembly can be replaced, which is convenient for the next switch. The work efficiency is greatly improved and working hours are saved.

[0038] like Figure 3 As shown: the first air guide tube 1 and the second air guide tube 2 are coaxially arranged with the rotating shaft 22, and an arc-shaped guide portion 12 is provided between the first air guide tube 1 and the first end plate 11 and between the second air guide tube 2 and the second end plate 21. The arc-shaped guide portion 12 and the corresponding air guide tube are an integral structure, and the switching assembly 3 includes a plurality of filter tubes 30, and the arc-shaped guide portion 12 reduces the space occupied by the switching assembly 3.

[0039] like Figure 4 As shown: the welding gas pipe 4 passes through and is fixed to the lower arc side of the first end plate 11, the second end plate 21 has a first positioning hole for the welding gas pipe 4 to pass through, one end of the rotating shaft 22 is fixed to the upper arc side of the second end plate 21, the upper arc side of the first end plate 11 has a second positioning hole for the end of the rotating shaft 22 to pass through, and the part of the rotating shaft 22 passing through the second positioning hole is a threaded part, which is fixed by a nut. The welding gas pipe 4 is also fixed to the lower side of the first air guide pipe 1 through a plurality of support frames, so that the first air guide pipe 1 and the welding gas pipe 4 are an integral structure, the welding gas pipe 4 is inserted into the first positioning hole for the first repositioning, and the rotating shaft 22 is inserted into the second positioning hole for the second repositioning. During assembly, the first air guide pipe 1 and the second air guide pipe 2 are mutually inserted and installed through the welding gas pipe 4 and the rotating shaft 22, and double-positioned, so that the corresponding pipe openings of the first air guide pipe 1 and the second air guide pipe 2 are aligned.

[0040] like Figure 5As shown: the first end plate 11 and the second end plate 21 are provided with circular sealing grooves 114 at the corresponding positions of the pipe openings, for installing an annular sealing ring 115, and the cross section of the sealing groove 114 is semicircular. It is used for butt sealing of the pipe openings of the air guide pipe and the filter pipe 30, and prevents air leakage at the interface gap during the rotation of the switching component 3.

[0041] The first end plate 11 is installed with a ball 112, and the corresponding sealing side of the first end plate 11 has a ball groove 111 for installing the ball 112. A spring 113 is installed in the ball groove 111 for resisting the ball 112, so that the ball 112 has an arc-shaped convex surface corresponding to the sealing side of the first end plate 11. The first rotary disk 31 is provided with an arc groove 311 at the position corresponding to the perforation, which is used to correspond to the ball 112. It is used to accurately locate the rotation position of the switching component 3 so that the filter tube 30 corresponds to the air guide tube orifice. The switching component 3 is rotated, and the first rotary disk 31 compresses the ball 112. When it rotates to the next filter tube 30, the ball 112 automatically snaps into the arc groove 311 corresponding to the next filter tube 30, and a click sound is clearly heard, indicating that the tube orifices are accurately aligned.

[0042] like Figure 6 As shown: the filter tube 30 is sleeved with a cotton filter layer 8, the filter layer 8 is a tube structure, and the side wall is corrugated. The filter layer 8 is sleeved on a tubular spring 81, one side of the tubular spring 81 is sealed by an end cover 82, and a sealing ring 83 is fixed on the other side, so that the filter layer 8 has an open side corresponding to the sealing ring 83. A support ring 34 is fixed at the position of the inner side wall of the filter tube 30 corresponding to the tube mouth, which is used to correspond to the sealing ring 83 and form a limiting support. The spring inside the filter layer 8 serves as a support, so that the filter layer 8 is formed into a tube structure. The diameter of the filter layer 8 is smaller than that of the filter tube 30, and a gap is formed between the inner walls of the corresponding filter tube 30. The side of the filter layer 8 corresponding to the end cap 82 corresponds to the first end plate 11 and the first air guide tube 1, which serves as an air inlet. After the airflow enters the filter tube 30, it fills the gap between the filter layer 8 and the filter tube 30, and further passes through the side wall of the filter layer 8 into the filter layer 8 under the action of suction. During the process of passing through the filter layer 8, fine dust is trapped, and the airflow passing through is discharged from the opening side of the filter layer 8 and transferred to the second air guide tube 2 to complete air purification. The filter layer 8 is an integral structure, which is easy to replace in the filter tube 30.

[0043] The end cap 82 is fixed with a clip 84 along the radial direction, and the two sides of the clip 84 extend beyond the edge of the end cap 82. The inner wall of the filter tube 30 corresponding to the pipe mouth position has a ring-shaped fixed limit block 35, and a groove body for the clip 84 to be inserted is formed between adjacent limit blocks 35. The limit block 35 has a limit groove for the end of the clip to be inserted. The projection structure of the limit groove is V-shaped, and the clip 84 is fixed to the end cap 82. When installing the filter layer 8, the clip 84 is pressed to compress the tubular spring 81, and the clip 84 is inserted along the groove body between the limit blocks, and then the clip 84 is rotated to move the end of the clip to the position of the limit groove. After releasing the external force, under the rebound action of the tubular spring 81, the end of the clip 84 is inserted into the limit groove, forming the support and fixation of the two sides of the filter layer 8, which is convenient for disassembling and installing the filter layer 8 as a whole. At the same time, the filter layer 8 is not easy to fall off in the corresponding filter tube, and the seal is tight.

[0044] like Figure 7 As shown: the other end of the second air duct 2 is supported by a support column 9 between the pipe opening and the ground, a base is fixed at the lower end of the support column 9, and a steering arm 6 is installed at the upper end. One side of the steering arm 6 is rotatably connected to the upper side of the support column 9, so that the horizontal angle of the steering arm 6 is adjustable, and a fixed plate 61 is provided on the other side, a turntable 23 is installed on the inner side of the fixed plate 61, a roller shaft 24 is fixed in the center of the turntable 23, and a roller shaft hole for installing the roller shaft 24 is opened in the center of the fixed plate 61. The end of the second air duct 2 is fixed to the turntable 23, and the vertical angle is adjusted by rotating the turntable 23 and the fixed plate 61.

[0045] The fixed plate 61 is fixed to the other side of the steering arm 6 , specifically the clamping plates on both sides. The turntable 23 is composed of circular plates on both sides and a roller shaft 24 fixed vertically in the center of the circular plates. The circular plates are in contact with the corresponding clamping plates and are rotated and adjusted by the roller shaft 24 .

[0046] A connecting column is fixed to one side of the steering arm 6 corresponding to the supporting column 9. The upper side of the supporting column has a column hole for sleeve-connecting the connecting column. The connecting column can be rotated after being inserted into the column hole, which is used to adjust the horizontal position of the steering arm. The first air duct 1 and the second air duct 2 are realized as an integral structure, and the horizontal and vertical angles are adjusted, so that the end welding gun 43 can be moved to multiple positions for welding.

[0047] The steering arm 6 is hollow inside to form an air flow channel, and air holes communicating with the air flow channel are provided on both sides of the steering arm 6. The second air duct 2 is communicated with the single air hole through the second bellows 52, and the other air hole is communicated with the exhaust manifold 7 through the third bellows 53. During the welding displacement process of the first air duct 1 and the second air duct 2 as a whole, the tail of the air duct can be communicated with the exhaust manifold 7 through the cooperation of multiple bellows to prevent the bellows from twisting during the steering process.

[0048] The turntable 23 is provided with a first point hole 25, and the fixed disk 61 is provided with a plurality of second point holes 62 around the center. The turntable 23 is rotated to align the first point hole 25 with the corresponding second point hole 62, and the first point hole 25 and the second point hole 62 are positioned and fixed by bolts. The first point hole 25 and the second point hole 62 are located on the same annular surface. Different second point holes 62 can be aligned during the rotation of the turntable, so that the angle of the air guide tube in the vertical direction can be adjusted. After the angle is adjusted, the height of the terminal gas hood 5 is fixed, and then the turntable 23 is fixed by bolts to adjust the appropriate processing height of the gas hood 5 and the welding gun 43.

[0049] This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention.

Claims

1. A cantilever welding fume purification device, characterized in that: It comprises a rigid first air guide tube (1) and a second air guide tube (2), wherein the first air guide tube (1) and the second air guide tube (2) are coaxially arranged, and a switching assembly (3) is installed at the corresponding docking section; The switching assembly (3) is composed of a plurality of filter tubes (30), the filter tubes (30) are uniformly arranged around the same sleeve (33), the corresponding pipe ends of the filter tubes (30) are respectively fixed to the first rotary disk (31) and the second rotary disk (32), the first rotary disk (31) and the second rotary disk (32) are both provided with perforations at positions corresponding to the pipe ends of the filter tubes (30), the filter tubes (30) are internally installed with a filter assembly, and the filter assembly can be detachably installed on the corresponding filter tubes (30); The first end plate (11) and the second end plate (21) are respectively fixed to the corresponding butt-joint end pipe openings of the first air guide pipe (1) and the second air guide pipe (2); the first end plate (11) and the second end plate (21) are both elliptical structures; a rotating shaft (22) is provided between the corresponding upper arc sides of the first end plate (11) and the second end plate (21) for sleeve engagement with the sleeve (33) so that the switching assembly (3) and the corresponding rotating shaft (22) rotate in unison and are used to switch the corresponding filter pipe (30) to connect the butt-joint sections of the first air guide pipe (1) and the second air guide pipe (2); The other end of the second air guide pipe (2) is connected to the exhaust main pipe (7) through a guide assembly, and the other end of the first air guide pipe (1) is connected to the air collecting hood (5) through a first corrugated pipe (51); A rigid welding gas pipe (4) is installed below the first gas pipe (1) and the second gas pipe (2); one end of the welding gas pipe (4) is connected to the welding gun (43) through a first hose (41), and the other end of the welding gas pipe (4) is connected to the main machine through a second hose (42); The first air guide tube (1) and the second air guide tube (2) are coaxially arranged with the rotating shaft (22), and an arc-shaped guide portion (12) is provided between the first air guide tube (1) and the first end plate (11) and between the second air guide tube (2) and the second end plate (21); The welding gas pipe (4) passes through and is fixed to the lower arc side of the first end plate (11); the second end plate (21) has a first positioning hole for the welding gas pipe (4) to pass through; one end of the rotating shaft (22) is fixed to the upper arc side of the second end plate (21); the upper arc side of the first end plate (11) has a second positioning hole for the end of the rotating shaft (22) to pass through; the portion of the rotating shaft (22) passing through the second positioning hole is a threaded portion and is fixed by a nut; The filter tube (30) is sleeved with a cotton filter layer (8), the filter layer (8) is a tube structure, and the side wall is corrugated. The filter layer (8) is sleeved on a tubular spring (81), one side of the tubular spring (81) is sealed by an end cover (82), and the other side is fixed with a sealing ring (83), so that the filter layer (8) has an open side corresponding to the sealing ring (83). A support ring (34) is fixed at a position on the inner side wall of the filter tube (30) corresponding to the tube opening, and is used to correspond to the sealing ring (83) and form a limit support; The other end of the second air guide tube (2) is supported between the pipe opening and the ground by a support column (9); a base is fixed at the lower end of the support column (9); a steering arm (6) is installed at the upper end; one side of the steering arm (6) is rotatably connected to the upper side of the support column (9) so that the horizontal angle of the steering arm (6) is adjustable; a fixed plate (61) is provided at the other side; a rotating plate (23) is installed inside the fixed plate (61); a roller shaft (24) is fixed at the center of the rotating plate (23); a roller shaft hole for installing the roller shaft (24) is opened at the center of the fixed plate (61); the end of the second air guide tube (2) is fixed to the rotating plate (23); and the vertical angle is adjusted by rotating the rotating plate (23) and the fixed plate (61).

2. A cantilever welding fume purification device according to claim 1, characterized in that: The first end plate (11) and the second end plate (21) are both provided with circular sealing grooves (114) at positions corresponding to the pipe openings for installing an annular sealing ring (115); the sealing grooves (114) have a semicircular arc cross section.

3. According to the cantilever welding fume purification device of claim 1, it is characterized in that: The first end plate (11) is installed with a ball (112), and the first end plate (11) has a ball groove (111) for installing the ball (112) on the corresponding sealing side, and a spring (113) is installed in the ball groove (111) for resisting the ball (112) so that the ball (112) has an arc-shaped convex surface on the sealing side corresponding to the first end plate (11), and the first rotary disk (31) is provided with an arc groove (311) at the position corresponding to the perforation for corresponding to the ball (112).

4. The cantilever welding fume purification device according to claim 1, characterized in that: The end cover (82) is fixed with a clamping strip (84) in the radial direction, and the two sides of the clamping strip (84) extend beyond the edge of the end cover (82). The inner wall of the filter tube (30) corresponding to the position of the tube mouth has an annular fixed limit block (35), and a groove body for the clamping strip (84) to be clamped is formed between adjacent limit blocks (35), and the limit block (35) has a limit groove for clamping the clamping strip into the end of the limit clamping strip.

5. The cantilever welding fume purification device according to claim 1, characterized in that: The steering arm (6) is hollow inside to form an air flow channel. Air holes communicating with the air flow channel are arranged on corresponding sides of the steering arm (6). The second air guide pipe (2) is communicated with the single air hole via a second bellows (52), and the other air hole is communicated with the exhaust main pipe (7) via a third bellows (53).

6. The cantilever welding fume purification device according to claim 1, characterized in that: The rotating disk (23) is provided with a first point hole (25), and the fixing disk (61) is provided with a plurality of second point holes (62) around the center. The rotating disk (23) is rotated to align the first point holes (25) with the corresponding second point holes (62), and the first point holes (25) are positioned and fixed by bolts.

Images