Steel structure welding device

Abstract

The invention relates to the field of welding instruments, in particular to a steel structure welding device which comprises a welding grip, a clamping mechanism used for clamping a welding rod is arranged in the welding grip, a filter cylinder is fixedly connected to the welding grip, and the filter cylinder is of a shell structure with an inner layer and an outer layer and comprises an inner cylinder and an outer cylinder. Notches used for ventilation are formed in the positions, at the front end and the rear end of the filter cartridge, of a shell, a filter fan is rotationally connected between an inner cartridge body and an outer cartridge body of the filter cartridge, teeth are evenly machined on the outer side of the filter fan, and a driving gear meshed with the teeth on the filter fan is rotationally connected into the outer cartridge body of the filter cartridge. And a filtering device is arranged at the position, located on the rear side of the filtering fan, between the inner barrel and the outer barrel, so that waste gas generated in the welding process can be directly filtered at the position of a welding point, and the health of field workers is not affected.

Description

Technical Field

[0001] The present invention relates to the field of welding instruments, and particularly to a steel structure welding device. Background Art

[0002] During the construction process of buildings, a large amount of steel structures are often required, and a large number of steel structures need to be cut and welded according to specific usage environments. During the welding process, spot welding tools are often used extensively.

[0003] Spot welding is a metal welding method, also known as resistance welding. Its principle is to apply pressure to the workpiece through electrodes and energize it, using the heat generated by the contact resistance to cause local melting, and forming a solder joint after cooling. Spot welding has many advantages; First, the spot welding reaction is rapid, usually able to produce a reaction within an extremely short time, which can significantly improve the welding efficiency; Second, parameters such as current, pressure, and heating time during the spot welding process can be precisely controlled, so the welding quality is stable and reliable, and can meet the requirements of various industrial applications; Third, the operation of the spot welding equipment is relatively simple, with low skill requirements for operators, and is easy to train and master; The spot welding equipment includes a welding power source, welding tongs, welding cables, clamps, and welding rods. Among them, the welding power source mainly provides the power source. During use, the welding tongs are connected to the positive pole of the welding power source through the welding cable, and the clamps are connected to the negative pole of the power source through the welding cable. The welding rod is clamped by the welding tongs, and the clamps are connected to the workpiece. The operator holds the welding tongs to weld the workpiece. However, during this process, a certain amount of toxic waste gas will be generated during the use of the welding rod, such as carbon monoxide, nitrogen oxides, and ozone, etc. Existing welding equipment often does not have relevant treatment devices, which may cause harm to people's bodies. For example, the personnel at the construction site are often relatively dense, which is likely to cause the users and other workers at the construction site to inhale more harmful gases, thus affecting their physical health. Summary of the Invention

[0004] The present invention provides a steel structure welding device, which can directly filter the waste gas generated during the welding process at the welding point by reforming the structure of the welding tongs, thus not affecting the health of the on-site workers.

[0005] The present invention provides a steel structure welding device, including: A welding grip, in which a clamping mechanism for clamping the welding rod is provided; Filter cartridge, the filter cartridge is fixedly installed on the welding handle, the filter cartridge is a double-layer shell structure inside and outside, including an inner cylinder and an outer cylinder, and the front and rear shells of the filter cartridge are provided with notches for ventilation; Filter fan, the filter fan is rotatably connected between the inner cylinder and the outer cylinder of the filter cartridge, the outer side of the filter fan is uniformly processed with teeth, and a driving gear meshing with the teeth on the filter fan is rotatably connected in the outer cylinder of the filter cartridge; Filter device, the filter device is arranged between the inner cylinder and the outer cylinder of the filter cartridge, and the filter device is located behind the filter fan.

[0006] Preferably, a particle blocking plate is arranged between the inner cylinder and the outer cylinder of the filter cartridge at a position in front of the filter fan, and the particle blocking plate is processed with dense fine holes.

[0007] Preferably, the particle blocking plate is slidably connected to the filter cartridge in the front-rear direction, a first spring is fixedly connected between the outer side of the particle blocking plate and the outer cylinder of the filter cartridge, a cleaning rod is fixedly connected to the front end of the filter fan, and a brush is installed on the cleaning rod.

[0008] Preferably, the particle blocking plate is slidably connected to the filter cartridge in the front-rear direction, a cleaning mechanism is arranged between the particle blocking plate and the filter fan, the cleaning mechanism is evenly distributed in a plurality along the circumferential direction of the particle blocking plate, the cleaning mechanism includes a first sliding contact plate and a folding plate, the first sliding contact plate is rotatably connected to the outer side of the particle blocking plate, each cleaning structure includes a pair of folding plates, the two folding plates in a pair of folding plates are respectively hinged to the first sliding contact plate and the front end of the filter fan, and the middle positions of the two folding plates are hinged, and a brush is arranged at one end of the folding plate close to the particle blocking plate facing the central axis of the filter cartridge, and a return spring is also arranged between the first sliding contact plate and the filter fan.

[0009] Preferably, the filter device includes multiple layers of filter cans, each filter can is divided into several arc-shaped areas, an adsorption substance for adsorbing flue gas is placed in the arc-shaped area, an air inlet end and an air outlet end are opened at both end faces of each arc-shaped area, a filter layer for adsorbing and treating the flue gas generated during welding is placed in the arc-shaped area, the arc-shaped areas in adjacent filter cans correspond one by one, and the air inlet end and the air outlet end of the adjacent filter layers are connected, and the air inlet end and the air outlet end of the arc-shaped area in each filter can are respectively located at the positions of the other two arc-shaped areas close to it.

[0010] Preferably, filter layers containing different adsorption substances are placed in multiple filter cans.

[0011] Preferably, the filter layer contains different levels, and each level contains different adsorption substances.

[0012] Preferably, the filtering device includes a filtering tank, the front and rear of the filtering tank are processed into a hollow shape, a medium for adsorbing flue gas is placed in the filtering tank, a stirring rod is slidably arranged in the filtering tank, a number of slender flexible rods are distributed on the stirring rod, the stirring rod passes through the front end of the filtering tank and is fixedly connected with a second sliding contact plate, a spring is arranged between the second sliding contact plate and the filtering tank, and the first sliding contact plate passes through the filtering fan through a rod and is fixedly connected with a third sliding contact plate corresponding to the second sliding contact plate.

[0013] Preferably, a frustum-shaped air inlet hood is fixedly installed at the front end of the filtering cylinder.

[0014] Preferably, the clamping mechanism includes a first clamping plate and a second clamping plate. The first clamping plate is fixedly installed on the welding handle, the second clamping plate is opposite to the first clamping plate and is slidably connected in the welding handle. The first clamping plate and the second clamping plate extend to the middle position of the filtering cylinder. A spring for clamping the first clamping plate and the second clamping plate is fixedly installed in the welding handle, and a pressing rod for fixedly connecting with the second clamping plate is further arranged on the welding handle.

[0015] Beneficial effects: 1. In the present invention, the driving gear meshes with the teeth on the filtering fan to drive the rotation of the filtering fan. During the rotation of the filtering fan, air and waste gas generated during the welding process are sucked into the position between the inner cylinder and the outer cylinder of the filtering cylinder. Subsequently, the waste gas is filtered by the filtering device. Since the filtering cylinder is very close to the welding point, the flue gas and waste gas generated during welding can be well absorbed by the filtering fan. After the absorbed waste gas is filtered by the filtering device, the filtering device contains substances with strong adsorption properties, such as activated carbon, molecular sieve, etc., which can have a good adsorption and removal effect on carbon monoxide, nitrogen oxides and ozone. The gas discharged from the rear side of the filtering cylinder will no longer pose a hazard to the on-site workers.

[0016] 2. After accumulating enough fine particles on the particle blocking plate in the present invention, it will affect the efficiency of the waste gas generated during the welding process entering the position between the inner cylinder and the outer cylinder of the filtering cylinder. At this time, since the filtering fan cannot absorb enough gas, it will generate a suction force on the particle blocking plate, causing the particle blocking plate to move towards the filtering fan. When the brush on the cleaning rod contacts the particle blocking plate, the brush can be inserted into the fine holes in the particle blocking plate to clean the fine particles. After the cleaning of the fine particles is completed, the air permeability of the particle blocking plate will become stronger, thus realizing the continuous operation of the particle blocking plate.

[0017] 3. When the first sliding contact plate drives the third sliding contact plate to approach and contact the second sliding contact plate, the second sliding contact plate will drive the stirring plate to reciprocate in the filter tank. The flexible rods on the stirring plate will repeatedly stir the adsorption medium in the filter tank. Since the utilization rate of the adsorption medium at different positions is different, the utilization rate of the adsorption medium at the end close to the filter fan is relatively high, while the utilization rate of the adsorption medium at the end far from the filter fan is relatively low. By repeatedly stirring the adsorption medium in the filter tank with the flexible rods on the stirring plate, the adsorption state of each part of the adsorption medium can always be in a uniform state, thereby prolonging the service life of the filter tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the sectional structural schematic diagram of Embodiment 1 of the present invention; Figure 3 is Figure 2 the partial enlarged structural schematic diagram at A in Figure 4 is the sectional structural schematic diagram of Embodiment 2 of the present invention; Figure 5 is Figure 4 the partial enlarged structural schematic diagram at B in Figure 6 is the structural schematic diagram of a filtering device in the present invention; Figure 7 is the structural schematic diagram of the second filtering device in the present invention; Figure 8 is the structural schematic diagram of the third filtering device in the present invention; Figure 9 is the structural schematic diagram of the clamping mechanism in the present invention Description of the reference numerals: 1. Welding grip; 2. Clamping mechanism; 21. First clamping plate; 22. Second clamping plate; 23. Pressing rod; 3. Filter cylinder; 31. Inner cylinder; 32. Outer cylinder; 33. Driving gear; 4. Filter fan; 41. Cleaning rod; 42. Third sliding contact plate; 5. Filtering device; 51. Filter tank; 511. Stirring rod; 512. Second sliding contact plate; 6. Particle blocking plate; 61. First spring; 7. Cleaning mechanism; 71. First sliding contact plate; 72. Folding plate; 73. Return spring; 8. Air inlet hood. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following is a detailed description of the specific embodiments of the present invention, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0020] AsFigures 1 to 9 As shown in the figure, the present invention provides a steel structure welding device, including: A welding grip 1, in which a clamping mechanism 2 for clamping the welding rod is provided; A filter cylinder 3, which is fixedly installed on the welding grip 1. The filter cylinder 3 is a double-layer shell structure inside and outside, including an inner cylinder 31 and an outer cylinder 32, and notch openings for ventilation are provided on the front and rear shells of the filter cylinder 3.

[0021] A filter fan 4, which is rotatably connected between the inner cylinder 31 and the outer cylinder 32 of the filter cylinder 3. Tooth teeth are evenly machined on the outer side of the filter fan 4, and a driving gear 33 meshing with the tooth teeth on the filter fan 4 is rotatably connected in the outer cylinder 32 of the filter cylinder 3.

[0022] A filtering device 5, which is arranged between the inner cylinder 31 and the outer cylinder 32 of the filter cylinder 3, and the filtering device 5 is located behind the filter fan 4.

[0023] During the process of using the present invention to weld the steel structure on the construction site, the worker holds the welding rod through the clamping mechanism 2 and holds the welding grip 1 to weld the workpiece. During this process, the driving gear 33 is driven to rotate by the built-in motor, and the driving gear 33 meshes with the tooth teeth on the filter fan 4 to drive the rotation of the filter fan 4. During the rotation of the filter fan 4, air and waste gas generated during the welding process are sucked into the position between the inner cylinder 31 and the outer cylinder 32 of the filter cylinder 3 together, and then the waste gas is filtered by the filtering device 5. Because the filter cylinder 3 and the welding point are very close, the fume waste gas generated during welding can be well absorbed by the filter fan 4 during this process. After the absorbed waste gas is filtered by the filtering device 5, the filtering device 5 contains substances with strong adsorption properties, such as activated carbon, molecular sieves, etc., which can have a good adsorption and removal effect on carbon monoxide, nitrogen oxides and ozone. The gas discharged from the rear side of the filter cylinder 3 will no longer pose a hazard to the workers at the use site.

[0024] As Figure 2 and Figure 4 shown, a particle blocking plate 6 is provided between the inner cylinder 31 and the outer cylinder 32 of the filter cylinder 3 at the position in front of the filter fan 4, and dense fine holes are machined on the particle blocking plate 6.

[0025] It should be noted that during the process of welding steel workpieces with welding rods, solid particulate matters will also be generated, such as fine particles formed by the molten metal splashing into the air and quickly cooling and condensing, or the slag formed on the outer side of the welding rod during the welding process. After these substances enter the filtering device 5, they are likely to block the filtering device 5, thereby affecting the absorption efficiency of the filtering device 5 for the harmful gases generated during the welding process. The particle blocking plate 6 can effectively block these particles while not affecting the air from entering between the inner cylinder 31 and the outer cylinder 32 of the filter cartridge 3.

[0026] Such as Figure 2 and Figure 3 As shown in the figure, the particle blocking plate 6 is slidably connected to the filter cartridge 3 in the front-back direction. A first spring 61 is fixedly connected between the outer side of the particle blocking plate 6 and the outer cylinder 32 of the filter cartridge 3. A cleaning rod 41 is fixedly connected to the front end of the filtering fan 4, and a brush is installed on the cleaning rod 41.

[0027] It should be noted that during the process of the particle blocking plate 6 blocking the fine particles, after a long-term accumulation, the fine particles will accumulate enough, and at this time, it will affect the efficiency of the waste gas generated during the welding process from entering between the inner cylinder 31 and the outer cylinder 32 of the filter cartridge 3. At this time, since the filtering fan 4 cannot absorb enough gas, it will generate a suction force on the particle blocking plate 6, so that the particle blocking plate 6 moves in the direction of the filtering fan 4. When the brush on the cleaning rod comes into contact with the particle blocking plate 6, the brush can be inserted into the fine holes in the particle blocking plate 6, thereby cleaning the fine particles. After the cleaning of the fine particles is completed, at this time, the air permeability of the particle blocking plate 6 will become stronger, and the filtering fan 4 will no longer generate a suction force on the particle blocking plate 6. At this time, under the rebounding action of the first spring 61, the particle blocking plate 6 will return to its initial position.

[0028] Such as Figure 4 and Figure 5 As shown in the figure, the particle blocking plate 6 is slidably connected to the filter cartridge 3 in the front-back direction. A cleaning mechanism 7 is arranged between the particle blocking plate 6 and the filtering fan 4. A plurality of cleaning mechanisms 7 are evenly distributed along the circumferential direction of the particle blocking plate 6. The cleaning mechanism 7 includes a first sliding contact plate 71 and a folding plate 72. The first sliding contact plate 71 is rotatably connected to the outer side of the particle blocking plate 6. Each cleaning structure includes a pair of folding plates 72. The two folding plates 72 in a pair of folding plates 72 are respectively hinged to the first sliding contact plate 71 and the front end of the filtering fan 4, and the middle positions of the two folding plates 72 are hinged. A brush is provided at one end of the folding plate 72 close to the particle blocking plate 6 facing the central axis of the filter cartridge 3. A return spring 73 is also arranged between the first sliding contact plate 71 and the filtering fan 4.

[0029] It should be noted that when fine particulate matter accumulates on the particle baffle 6, the particle baffle 6 will become airtight. At this time, since the filtration fan 4 cannot absorb enough air, it will generate a suction force on the particle baffle 6. At this time, the particle baffle 6 will move closer to the filtration fan 4. At this time, the folding plate 72 will fold. One end of the folding plate 72 close to the particle baffle 6 with a brush will face the particle baffle 6. At this time, the filtration fan 4 will drive the folding plate 72 to rotate, and the brush on the folding plate 72 will clean the particle baffle 6. After the cleaning is completed, the air permeability of the particle baffle 6 will increase. At this time, the filtration fan 4 cannot generate a suction force on the particle baffle 6. At this time, under the rebounding action of the return spring 73, the particle baffle 6 will return to its initial position. The advantage of this is that when the particle baffle 6 normally blocks impurity particles, the cleaning mechanism 7 will not have any impact on the flow direction of the air duct.

[0030] As Figure 6 shown, the filtration device 5 includes multiple layers of filtration tanks 51. Each filtration tank 51 is divided into several arc-shaped areas. An adsorption substance for adsorbing flue gas is placed in the arc-shaped area. An air inlet end and an air outlet end are opened on both end faces of each arc-shaped area. A filtration layer for adsorbing and treating the flue gas generated during the welding process is placed in the arc-shaped area. The arc-shaped areas in adjacent filtration tanks 51 correspond one by one, and the air inlet ends and air outlet ends of the adjacent filtration layers are connected. The air inlet end and the air outlet end of the arc-shaped area in each filtration tank 51 are respectively located at the positions of the other two arc-shaped areas close to it.

[0031] It should be noted that the medium of the filtration layer in the filtration tank 51 is a medium with strong adsorption, such as activated carbon, molecular sieve, etc. During the process of adsorbing the waste gas generated during the welding process, through the above technical solution, the waste gas generated during the welding process can be filtered multiple times, so that the waste gas is treated more fully. At the same time, the waste gas can cross the entire arc-shaped area during filtration, so that the filtration is more complete.

[0032] Filter layers containing different adsorption substances are placed in multiple filtration tanks 51.

[0033] It should be noted that different adsorption media have different adsorption properties for various components in the waste gas, and their service lives are also different. The contents of various components in the waste gas generated by welding are also different. Filter layers with different adsorption substances are placed in multiple filtration tanks 51. In this way, when the filtration layer in a certain filtration tank 51 cannot perform the adsorption work well, only this filtration tank 51 needs to be replaced.

[0034] As Figure 6 and Figure 7As shown, the filter layer includes different levels, and each level contains different adsorption substances.

[0035] It should be noted that even if the filter layer in one of the filter tanks 51 fails in the above manner, the impact on the filtering effect will still not be very significant.

[0036] As Figure 4 , Figure 5 and Figure 8 As shown, the filtering device includes a filter tank 51. The front and back of the filter tank 51 are processed into a hollow shape. A medium for adsorbing flue gas is placed in the filter tank 51. A stirring rod 511 is slidably arranged in the filter tank 51. A number of slender flexible rods are distributed on the stirring rod 511. The stirring rod 511 passes through the front end of the filter tank 51 and is fixedly connected to a second sliding contact plate 512. A spring is arranged between the second sliding contact plate 512 and the filter tank 51. The first sliding contact plate 71 is fixedly connected to a third sliding contact plate 42 corresponding to the second sliding contact plate 512 through a rod passing through the filter fan 4.

[0037] It should be noted that when the first sliding contact plate 71 drives the third sliding contact plate 42 to approach and contact the second sliding contact plate 512, the second sliding contact plate 512 will drive the stirring plate to reciprocate in the filter tank 51. The flexible rods on the stirring plate will repeatedly stir the adsorption medium in the filter tank 51. Since the utilization rate of the adsorption medium at different positions is different, the utilization rate of the adsorption medium at the end close to the filter fan 4 is relatively high, while the utilization rate of the adsorption medium at the end far from the filter fan 4 is relatively low. By repeatedly stirring the adsorption medium in the filter tank 51 with the flexible rods on the stirring plate, the adsorption state of each part of the adsorption medium can be kept in a uniform state all the time, thereby prolonging the service life of the filter tank 51.

[0038] As Figure 2 and Figure 4 As shown, a conical air inlet hood 8 is fixedly installed at the front end of the filter cylinder 3. The air inlet hood 8 is made of a transparent material.

[0039] It should be noted that the air inlet hood 8 can limit the activity range of the waste gas generated during the welding process, which is more conducive to the filter fan 4 adsorbing the waste gas into the filter cylinder 3. And the fact that the air inlet hood 8 is made of a transparent material enables the user to observe the welding condition more clearly.

[0040] As Figure 1 and Figure 9As shown in the figure, the clamping mechanism 2 includes a first clamping plate 21 and a second clamping plate 22. The first clamping plate 21 is fixedly installed on the welding handle 1. The second clamping plate 22 is opposite to the first clamping plate 21 and is slidably connected in the welding handle 1. The first clamping plate 21 and the second clamping plate 22 extend to the middle position of the filter cartridge 3. A spring for clamping the first clamping plate 21 and the second clamping plate 22 is fixedly installed in the welding handle 1. A pressing rod 23 for fixedly connecting with the second clamping plate 22 is further arranged on the welding handle 1.

[0041] It should be noted that when replacing the welding rod, press the pressing rod 23, and the second clamping plate 22 will slide, causing a gap at the ends of the first clamping plate 21 and the second clamping plate 22. Then place the welding rod between the first clamping plate 21 and the second clamping plate 22. Under the pulling force of the spring, the first clamping plate 21 and the second clamping plate 22 can clamp the welding rod. At the same time, the first clamping plate 21 is connected to the power supply to supply power for the welding operation.

[0042] The above discloses only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A steel structure welding device, characterized in that: include: A welding handle (1), wherein the welding handle (1) is provided with a clamping mechanism (2) for clamping a welding rod; A filter cartridge (3), the filter cartridge (3) being fixedly mounted on the welding handle (1), the filter cartridge (3) being an inner and outer double-layer shell structure, comprising an inner cylinder (31) and an outer cylinder (32), and slots for ventilation are provided on the shells at the front and rear ends of the filter cartridge (3); A filter fan (4), the filter fan (4) being rotatably connected to a position between an inner cylinder (31) and an outer cylinder (32) of the filter cylinder (3), the outer side of the filter fan (4) being uniformly processed with teeth, and a driving gear (33) meshing with the teeth on the filter fan (4) being rotatably connected in the outer cylinder (32) of the filter cylinder (3); A filter device (5), wherein the filter device (5) is arranged between the inner cylinder (31) and the outer cylinder (32) of the filter cylinder (3), and the filter device (5) is located at the rear side of the filter fan (4).

2. A steel structure welding device according to claim 1, characterized in that: A particle blocking plate (6) is provided between the inner cylinder (31) and the outer cylinder (32) of the filter cylinder (3) at a position located at the front end of the filter fan (4), and the particle blocking plate (6) is processed with dense fine holes.

3. A steel structure welding device according to claim 2, characterized in that: The particle blocking plate (6) is slidably connected to the filter cartridge (3) along the front-to-back direction; a first spring (61) is fixedly connected between the outer side of the particle blocking plate (6) and the outer cylinder (32) of the filter cartridge (3); a cleaning rod (41) is fixedly connected to the front end of the filter fan (4); and a brush is mounted on the cleaning rod (41).

4. A steel structure welding device according to claim 2, characterized in that: The particle blocking plate (6) is slidably connected to the filter cartridge (3) along the front-to-back direction. A cleaning mechanism (7) is provided between the particle blocking plate (6) and the filter fan (4). A plurality of the cleaning mechanisms (7) are evenly distributed along the circumference of the particle blocking plate (6). The cleaning mechanism (7) comprises a first sliding contact plate (71) and a folding plate (72). The first sliding contact plate (71) is rotatably connected to the outer side of the particle blocking plate (6). Each cleaning structure comprises a pair of folding plates (72). Two folding plates (72) in the pair of folding plates (72) are respectively hinged to the first sliding contact plate (71) and the front end of the filter fan (4), and the middle positions of the two folding plates (72) are hinged. A brush is provided at one end of the folding plate (72) close to the particle blocking plate (6) and facing the central axis of the filter cartridge (3). A reset spring (73) is also provided between the first sliding contact plate (71) and the filter fan (4).

5. The steel structure welding device according to any one of claims 1 to 4, characterized in that: The filtering device (5) comprises a multi-layer filtering tank (51), each filtering tank (51) being divided into a plurality of arc-shaped areas, an adsorbent for adsorbing smoke being placed in the arc-shaped areas, an air inlet end and an air outlet end being provided at both end surfaces of each arc-shaped area, a filtering layer for adsorbing smoke generated during welding being placed in the arc-shaped area, the arc-shaped areas in adjacent filtering tanks (51) corresponding to each other one by one, and the air inlet ends and air outlet ends of adjacent filtering layers being connected, and the air inlet end and air outlet end of the arc-shaped area in each filtering tank (51) being respectively located at the positions of the other two arc-shaped areas adjacent to it.

6. A steel structure welding device according to claim 5, characterized in that: Filter layers containing different adsorbents are placed in a plurality of filter tanks (51).

7. A steel structure welding device according to claim 5, characterized in that: The filter layer comprises different layers, each layer containing different adsorbents.

8. A steel structure welding device according to claim 4, characterized in that: The filtering device comprises a filter tank (51), the front and rear of the filter tank (51) are processed into a hollow shape, a medium for absorbing smoke is placed in the filter tank (51), a stirring rod (511) is slidably arranged in the filter tank (51), a plurality of slender flexible rods are distributed on the stirring rod (511), the stirring rod (511) passes through the front end of the filter tank (51) and is fixedly connected to a second sliding contact plate (512), a spring is provided between the second sliding contact plate (512) and the filter tank (51), and the first sliding contact plate (71) passes through the filter fan (4) through a rod and is fixedly connected to a third sliding contact plate (42) corresponding to the second sliding contact plate (512).

9. A steel structure welding device according to claim 5, characterized in that: A frustum-shaped air intake cover (8) is fixedly mounted on the front end of the filter cartridge (3), and the air intake cover (8) is made of a transparent material.

10. A steel structure welding device according to claim 1, characterized in that: The clamping mechanism (2) comprises a first clamping plate (21) and a second clamping plate (22), wherein the first clamping plate (21) is fixedly mounted on the welding handle (1), and the second clamping plate (22) is slidably connected to the welding handle (1) relative to the first clamping plate (21), and the first clamping plate (21) and the second clamping plate (22) extend toward the middle position of the filter cartridge (3), and a spring for clamping the first clamping plate (21) and the second clamping plate (22) is fixedly mounted in the welding handle (1), and a pressing rod (23) for fixedly connecting to the second clamping plate (22) is also provided on the welding handle (1).

Images