A welding fume purifier for an automobile girder welding table

Abstract

The present invention provides a welding fume purifier for an automobile girder welding table, which relates to the field of fume purification. The welding fume purifier for the automobile girder welding table includes a fixed base and a housing. It is characterized in that: a mixing area and a precipitation area are provided inside the housing. A mixture of sulfur dioxide and sulfur trioxide is provided inside the mixing area, which is used to increase the particle size of the welding fumes and separate the particles in the welding fumes. A liquid chemical flocculant is provided inside the precipitation area; through the provided precipitation area and mixing area, the chemical flocculant is loaded in the precipitation area, and the mixing area is a mixed gas of sulfur dioxide and sulfur trioxide, so that the particles in the fumes form large particle impurities, and the rate of discharging the large particle particles is increased. Since most of the particles in the welding fumes have been separated, the working burden of the filter element is greatly reduced, and the situation that the filter element needs to be replaced frequently due to blockage is reduced.

Description

Technical Field

[0001] The present invention relates to the field of soot purification, and specifically to a welding fume purifier for an automobile beam welding table. Background Art

[0002] Soot purification is a technology for efficiently purifying industrial waste gas smoke and soot, aiming to protect the health of workers, improve the working environment and reduce environmental pollution. When welding an automobile beam welding table, soot will be generated. The impurities in the welding soot usually include metal oxides, nitrogen oxides, and hydrocarbons. These impurities form fine particles in the air, causing direct harm to the respiratory system, skin and eyes of workers, etc., and need to be purified by a fume purifier. The fume purifier is used to capture and filter a large amount of harmful soot and gas generated during processes such as welding, cleaning, and spraying. In some high-precision cutting processes, the cutting groove can reach a size of several micrometers or even smaller, and corresponding impurities will also be generated. These impurities not only cause serious harm to the health of operators, such as causing respiratory diseases, etc., but also pollute the environment.

[0003] When the existing welding fume purifiers and general cutting impurity treatment equipment deal with these tiny particle impurities, various materials of filter elements are generally used, such as paper filter elements, activated carbon filter elements, and fiber filter elements. The filter elements usually have a relatively high filtration accuracy and can filter out tiny particles of a certain size. However, as the use time increases, the filter elements are prone to clogging and need to be replaced regularly and frequently to ensure the filtering effect. Otherwise, it is difficult for the filter elements to efficiently separate and remove the welding fumes. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a welding fume purifier for an automobile beam welding table, which solves the problems put forward in the above background art.

[0005] To achieve the above purposes, the present invention is realized through the following technical solutions: A welding fume purifier for an automobile beam welding table, including a fixed base and a housing, characterized in that: a mixing area and a precipitation area are provided inside the housing. A mixture of sulfur dioxide and sulfur trioxide is provided inside the mixing area to increase the particle size of the particles in the welding fumes and separate the particles in the welding fumes. A liquid chemical flocculant is provided inside the precipitation area. An air inlet pipe for injecting the mixture of sulfur dioxide and sulfur trioxide into the mixing area is communicated with the outer surface of the housing. An air extraction pipe is communicated with the outer surface of the housing. The air extraction pipe is used to transport the welding fumes to the precipitation area, and the other end of the air extraction pipe is located inside the precipitation area. An exhaust assembly for purification is communicated with the outer surface of the housing. The purification assembly is used to discharge the welding fumes after separating the particles.

[0006] Inside the outer shell, a rotating shell for rotation is rotatably installed. The outer surface of the rotating shell is provided with slag discharge grooves for discharging large particle impurities, and a number of slag discharge grooves are provided. Inside the outer shell, a rotating mechanism for mixing and stirring gas is installed. A number of fixed cylinders are fixedly installed on the inner wall of the rotating shell. Inside each fixed cylinder, a rotating rod is rotatably connected. On the outer surface of each fixed cylinder, two symmetrically arranged bimetallic strips in close contact with the rotating rod are fixedly inlaid. When each rotating rod rotates, it is used to generate heat by friction with the fixed cylinder and the bimetallic strip close to it. Inside each bimetallic strip, a number of cutting grooves A and a number of cutting grooves B are provided. A star-shaped structure is formed between a number of bimetallic strips.

[0007] Preferably, both the fixed cylinder and the rotating rod are made of copper alloy material.

[0008] Preferably, the rotating mechanism includes a motor, a rotating rod, a turntable, a toothed ring, a number of gears and a number of arc-shaped pieces. The motor is fixedly connected to the outer shell, and the output end of the motor is fixedly connected to one end of the rotating rod. The rotating rod is rotatably connected to the outer shell, and the intersection of the two is sealed. The other end of the rotating rod is fixedly connected to the turntable. The turntable is rotatably connected to the outer shell. The toothed ring is located inside the turntable and is fixedly connected to the outer shell. Each gear is meshed with the toothed ring. A number of gears are respectively fixedly connected to a number of rotating rods. Each arc-shaped piece is fixedly connected to the rotating rod. Each rotating rod is rotatably connected to the turntable. When the turntable rotates, it is used to drive a number of rotating rods to rotate circumferentially.

[0009] Preferably, the bottom of the rotating shell is immersed in the precipitation area.

[0010] Preferably, each exhaust component includes an exhaust pipe and a filter element for purifying welding fumes. The filter element is installed inside the exhaust pipe, and the two are detachable. The exhaust pipe is communicated with the outer shell.

[0011] Preferably, the cutting grooves A and the cutting grooves B in each bimetallic strip are arranged alternately, and the lengths of the cutting grooves B decrease in sequence.

[0012] Preferably, each bimetallic strip includes a copper sheet and an iron sheet that are attached to each other.

[0013] Preferably, one end of each bimetallic strip is fixedly connected with a sealing strip. An arc-shaped elastic pad is fixedly connected between every two sealing strips. The inside of the elastic pad is set as a fine pore structure, and the fine pore structure is used for passing gas.

[0014] Preferably, a support plate is fixedly connected between every two bimetallic strips.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The welding fume purifier for the vehicle frame welding table forms large particles that are easy to settle by the particles in the welding fume through the sedimentation area and the mixing area provided. The sedimentation area is filled with chemical flocculants, and the mixing area is a mixed gas of sulfur dioxide and sulfur trioxide. The sedimentation area and the mixing area cooperate to form large particles that are easy to settle. Through the star-shaped structure formed between several bimetallic strips provided and with the cooperation of the rotating action, the mixed gas can be fully mixed to improve the rate of generating large particles. During the rotation, heat is generated by friction, causing the bimetallic strip to bend. When bending, with the thrust of time, the gap between the bimetallic strips becomes larger and larger. With the multiple cutting grooves A opened on the bimetallic strip and the cutting grooves B with gradually decreasing lengths, the bimetallic strip can be inclined when bending, so as to improve the rate of discharging large particles. Since most of the particles in the welding fume have been separated, the working burden of the filter element is greatly reduced, reducing the frequent replacement of the filter element due to blockage.

[0017] 2. In the welding fume purifier for the vehicle frame welding table, the sedimentation area is internally filled with chemical flocculants, which can start to flocculate with the particles in the welding fume, causing small particles to form large particle flocs. These flocs are easier to settle and can be removed through subsequent treatment. A large amount of metal oxides, such as iron oxides and manganese oxides, are generated during the welding process. These metal oxide particles are usually small and difficult to directly remove. The chemical flocculants can, through adsorption and bridging actions, cause these small particles to aggregate together to form larger particles, which are easier to settle in the sedimentation area, thus facilitating the separation of the particles in the welding fume. Sulfur dioxide has certain oxidizing properties and can react chemically with some metal particles in the welding fume to form larger sulfate particles. Sulfur trioxide has strong hydrophilicity and reactivity and can quickly react with the water vapor in the welding fume to generate sulfuric acid mist. The sulfuric acid mist can adsorb the surrounding impurity particles, increasing their particle size. At the same time, the sulfuric acid mist can also react with alkaline impurities through a neutralization reaction, further promoting the formation of particles, thereby separating the particles in the welding fume. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a rear view of the outer shell of the present invention;

[0020] Figure 3 It is a cross-sectional view of the front view of the overall structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the gear ring and gear structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the bimetallic strip when closed under normal conditions of the present invention;

[0023] Figure 6 This is a schematic structural diagram of the bimetallic strip after bending according to the present invention;

[0024] Figure 7 This is a schematic structural diagram of the outer shell of the present invention;

[0025] Figure 8 This is a sectional view of the front view of the outer shell of the present invention;

[0026] Figure 9 This is a schematic structural diagram of the rotating shell of the present invention;

[0027] Figure 10 This is a sectional view of the schematic structural diagram of the bimetallic strip and the elastic pad of the present invention;

[0028] Figure 11 This is a schematic structural diagram of the bimetallic strip of the present invention.

[0029] Wherein: 1, base; 2, outer shell; 3, mixing zone; 4, sedimentation zone; 5, intake pipe; 6, exhaust pipe; 7, rotating shell; 8, slag discharge groove; 9, fixed cylinder; 10, rotating rod; 11, bimetallic strip; 101, cutting groove A; 102, cutting groove B; 103, copper sheet; 104, iron sheet; 12, motor; 13, rotating rod; 14, turntable; 15, toothed ring; 16, gear; 17, arc-shaped piece; 18, exhaust pipe; 19, filter element; 20, sealing strip; 21, elastic pad; 22, support plate. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indications will also change accordingly.

[0032] In this application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In addition, in this application, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0034] Such as Figures 1 - 11As shown in the figure, a welding fume purifier for an automobile girder welding table includes a fixed base 1 and a housing 2. The base 1 is installed at the bottom of the housing 2, and the base 1 is detachable from the housing 2. It is characterized in that: one end of the housing 2 is in an arc shape. Inside the housing 2, there are a mixing zone 3 and a sedimentation zone 4. Inside the mixing zone 3, there is a mixture of sulfur dioxide and sulfur trioxide, which is used to increase the particle size of the particles in the welding fume and separate the particles in the welding fume. Sulfur dioxide is used to form larger sulfate particles from the metal particles in the welding fume. Sulfur trioxide is used to react with the water vapor in the welding fume to generate sulfuric acid mist. The sulfuric acid mist is used to adsorb the impurity particles in the welding fume, increase their particle size, and separate the particles in the welding fume. The mixture of sulfur dioxide and sulfur trioxide generally does not react because sulfur dioxide and sulfur trioxide are two different compounds, and their chemical reaction requires specific conditions or catalysts to proceed. Therefore, a mixture of sulfur dioxide and sulfur trioxide is used. Sulfur dioxide has certain oxidizing properties and can react chemically with some metal particles in the welding fume to form larger sulfate particles and separate the particles in the welding fume. Sulfur trioxide has strong hydrophilicity and reactivity and can quickly react with the water vapor in the welding fume to generate sulfuric acid mist. The sulfuric acid mist can adsorb the surrounding impurity particles, increase their particle size. At the same time, the sulfuric acid mist can also react with alkaline impurities to neutralize them, further promoting the formation of particles and facilitating the separation of the particles in the welding fume. Inside the sedimentation zone 4, there is a liquid chemical flocculant. Chemical flocculants such as polyacrylamide PAM and polyaluminum chloride PAC can start to flocculate with the particles in the welding fume, forming large particle flocs, thereby separating the particles in the welding fume. These flocs are more likely to settle and be removed by subsequent treatment devices. The outer surface of the housing 2 is connected to an air inlet pipe 5 for injecting the mixture of sulfur dioxide and sulfur trioxide into the mixing zone 3. A one-way valve is installed inside the air inlet pipe 5. The outer surface of the housing 2 is connected to an air extraction pipe 6. The air extraction pipe 6 is used to transport the welding fume to the sedimentation zone 4. The other end of the air extraction pipe 6 is located inside the sedimentation zone 4. The outer surface of the housing 2 is connected to an exhaust assembly for purification. The purification assembly is used to discharge the welding fume after separating the particles. Each exhaust assembly includes an exhaust pipe 18 and a filter element 19 for purifying the welding fume. The filter element 19 is installed inside the exhaust pipe 18, and the two are detachable. The exhaust pipe 18 is connected to the housing 2 so that the gas in the mixing zone 3 can be discharged from the exhaust pipe 18. The filter element 19 is used for the final purification of the fume. Since most of the ions in the welding fume have been separated by forming large particles, the working burden of the filter element 19 is reduced, and the situation of frequent replacement of the filter element 19 due to blockage of the filter element 19 is prevented.

[0035] Inside the housing 2, a rotating housing 7 for rotation is rotatably installed. The outer surface of the rotating housing 7 is provided with slag discharge grooves 8 for discharging large particle impurities, and a plurality of slag discharge grooves 8 are provided. The bottom of the rotating housing 7 is immersed in the precipitation area 4, which is beneficial for the separated particles to enter the precipitation area 4, and is also beneficial for combining the applied liquid and gas together to jointly separate the particles in the welding fume, so as to improve the separation efficiency of the particles in the welding fume and the separation effect of the particles in the fume. Inside the housing 2, a rotating mechanism for mixing and stirring the gas is installed. The rotating mechanism includes a motor 12, a rotating rod 13, a turntable 14, a toothed ring 15, a plurality of gears 16 and a plurality of arc-shaped pieces 17. The motor 12 is fixedly connected to the housing 2, and the output end of the motor 12 is fixedly connected to one end of the rotating rod 13. The rotating rod 13 is rotatably connected to the housing 2, and the intersection of the two is sealed. The other end of the rotating rod 13 is fixedly connected to the turntable 14. The turntable 14 is rotatably connected to the housing 2. The toothed ring 15 is located inside the turntable 14 and is fixedly connected to the housing 2. Each gear 16 is meshed with the toothed ring 15. A plurality of gears 16 are respectively fixedly connected to a plurality of rotating rods 10. Each arc-shaped piece 17 is fixedly connected to the rotating rod 13. Each rotating rod 10 is rotatably connected to the turntable 14. When the turntable 14 rotates, it is used to drive a plurality of rotating rods 10 to rotate circumferentially. By driving the rotating rod 13 to rotate through the motor 12, the rotating rod 13 can not only drive a plurality of arc-shaped pieces 17 to rotate, so that the welding fume, sulfur dioxide and sulfur trioxide are mixed, but also convey the large particle foreign matters generated after mixing outward. The rotation of the rotating rod 13 can also drive the turntable 14 to rotate, so that the turntable 14 drives a plurality of rotating rods 10 to perform circular motion, and then drives a plurality of gears 16 to perform circular motion. Since the position of the toothed ring 15 is fixed, under the action of the circular motion of the gear 16, the gear 16 can also rotate along the inner wall of the toothed ring 15, so as to generate heat by friction. Moreover, during the circular rotation of the rotating rod 10, it can also drive a star-shaped structure to be formed among a plurality of bimetallic sheets 11 to rotate. On the one hand, it is beneficial for the rapid mixing of the gas, facilitates the rapid formation of large particle precipitation, and reduces the time for generating large particle precipitation. On the other hand, it prevents the situation of blockage caused by the separated and formed large particle particles.

[0036] A number of fixed cylinders 9 are fixedly installed on the inner wall of the rotating shell 7. A rotating rod 10 is rotatably connected inside each fixed cylinder 9. Two symmetric bimetallic strips 11 that are in close contact with the rotating rod 10 are fixedly embedded on the outer surface of each fixed cylinder 9. When each rotating rod 10 rotates, it is used to generate heat by friction with the adjacent fixed cylinder 9 and bimetallic strip 11. Both the fixed cylinder 9 and the rotating rod 10 are made of copper alloy material. The copper alloy can improve hardness and wear resistance by adjusting the composition. Aluminum alloy is light in weight, has good thermal conductivity, and can improve wear resistance through surface treatment. For example, an anodic oxidation treatment can form a hard oxide film on the surface of the aluminum alloy to reduce wear. A number of cutting grooves A101 and a number of cutting grooves B102 are formed inside each bimetallic strip 11. The cutting grooves A101 and cutting grooves B102 in each bimetallic strip 11 are arranged alternately, and the lengths of the cutting grooves B102 decrease in sequence, making the end of the bimetallic strip 11 more likely to bend, thus facilitating the opening of a slag discharge channel between the ends of multiple groups of bimetallic strips 11. Since the lengths of the cutting grooves B102 decrease in sequence, the bimetallic strip 11 is more likely to shift to one side when bent, which is conducive to the sliding of the separated particulate impurities and their discharge into the precipitation area 4. A star-shaped structure is formed between a number of bimetallic strips 11. Each bimetallic strip 11 includes a copper sheet 103 and an iron sheet 104 that are bonded together. The copper sheet 103 and the iron sheet 104 are in close contact and in a balanced state. At this time, the bimetallic strip 11 is flat as a whole. When the bimetallic strip 11 is heated, due to the different thermal expansion coefficients of the copper sheet 103 and the iron sheet 104, the copper sheet 103 expands more than the iron sheet 104. Since the two metal sheets are bonded together, the copper sheet 103 and the iron sheet 104 cannot expand freely. Therefore, the expansion of the copper sheet 103 is restricted by the iron sheet 104, and the expansion of the iron sheet 104 is also affected by the copper sheet 103. Since the copper sheet 103 expands more and the iron sheet 104 expands less, this causes the bimetallic strip 11 to bend towards the iron sheet 104 side after being heated. This bending is the result of the combined action of the thermal expansion difference between the two metals and the restriction of the bonding structure. One end of each bimetallic strip 11 is fixedly connected to a sealing strip 20. An arc-shaped elastic pad 21 is fixedly connected between every two sealing strips 20. The inside of the elastic pad 21 is a fine pore structure, and the fine pore structure is used for passing gas. When the bimetallic strip 11 bends, the elastic pad 21 also bends along with it, increasing the bending amplitude. Large particulate impurities can slide along the arc surface of the elastic pad 21. The greater the bending amplitude of the bimetallic strip 11, the faster the discharge rate of the separated particles. A support plate 22 is fixedly connected between every two bimetallic strips 11. By providing the support plate 22, it is used to provide a supporting force for the bimetallic strip 11 to prevent the bimetallic strip 11 from shifting towards the end close to the fixed cylinder 9.

[0037] Working principle:

[0038] First, it is necessary to connect the external fan and air pipe to the outermost end of the exhaust pipe 6, and draw the welding fumes generated during welding into the exhaust pipe 6 through the fan and air pipe. The welding fumes in the exhaust pipe 6 pass through the precipitation area 4, slag discharge tank 8, and mixing area 3 in sequence. It should be noted that a booster pump can be installed at one end of the air pipe to provide sufficient pressure to enable the welding fumes in the exhaust pipe 6 to pass through the liquid in the precipitation area 4 and be transported to the mixing area 3. When the welding fumes enter the precipitation area 4, since chemical flocculants such as polyacrylamide PAM and polyaluminum chloride PAC are installed inside the precipitation area 4, they can start to flocculate with the particles in the welding fumes, causing small particles to form large particle flocs. These flocs are more likely to settle and be removed through subsequent treatment. It should be noted that a large amount of metal oxides such as iron oxides and manganese oxides are generated during the welding process. These metal oxide particles are usually small and difficult to directly remove. The chemical flocculants can, through adsorption and bridging effects, cause these small particles to aggregate together to form larger particles, which are more likely to settle in the precipitation area 4, thus facilitating the separation of the particles in the welding fumes. Immediately afterwards, the welding fumes enter the mixing area 3 through the multiple slag discharge tanks 8 at the rotating shell 7, that is, the inside of the rotating shell 7. Since a number of cutting grooves A101 and cutting grooves B102 are provided inside each bimetallic sheet 11, and the inside of the elastic pad 21 is a porous structure, part of the fumes will pass through the cutting grooves A101, cutting grooves B102, and the elastic pad 21 and be distributed in the mixing area 3. It should be noted that at this time, sulfur dioxide and sulfur trioxide gases need to be evenly mixed, and then transported into the air inlet pipe 5 through an external air pump, and then enter the mixing area 3. At the same time, start the motor 12 to drive the rotating rod 13 to rotate. The rotating rod 13 drives the turntable 14 to rotate. The turntable 14 drives a number of rotating rods 10 to rotate in a circle. The number of rotating rods 10 drives a number of fixed cylinders 9 to move in a circle. Under the cooperative action of the number of fixed cylinders 9, the rotating shell 7 is driven to rotate. With the star-shaped structure formed between a number of bimetallic sheets 11, it plays a role in stirring the mixed gas. On the one hand, it makes the distribution of the mixed gas more uniform, and on the other hand, it enables these gases to be fully mixed. It should be noted that sulfur dioxide has certain oxidizing properties and can react chemically with some metal particles in the welding fumes to form larger sulfate particles. Sulfur trioxide has strong hydrophilicity and reactivity and can quickly react with the water vapor in the welding fumes to generate sulfuric acid mist. The sulfuric acid mist can adsorb the surrounding impurity particles, increasing their particle size. At the same time, the sulfuric acid mist can also undergo a neutralization reaction with alkaline impurities, further promoting the formation of particles, thereby separating the particles in the welding fumes. Part of the separated particles remain in the middle of the mixing area 3, and the other part of the particles settle into the precipitation area 4. It should be noted that at this time, multiple groups of sealing strips 20 are in close contact, reducing the probability of uneven mixing gas generation during rotation.

[0039] Subsequently, during the rotation of multiple rotating rods 10, they respectively drive multiple gears 16 to rotate circumferentially. Since multiple gears 16 are engaged with the toothed ring 15 and the position of the toothed ring 15 remains stationary, at this time, multiple gears 16 respectively drive multiple rotating rods 10 to rotate on their own during the circumferential motion, and respectively generate frictional heat with multiple fixed cylinders 9 and bimetallic strips 11. The heat of the fixed cylinder 9 can also be transferred to the bimetallic strip 11. Since the bimetallic strip 11 is composed of a copper sheet 103 and an iron sheet 104, and the expansion coefficient of the copper sheet 103 is greater than that of the iron sheet 104, during the expansion process, the copper sheet 103 bends towards the direction of the iron sheet 104. And due to the existence of the cutting groove A101, when the bimetallic strip 11 is heated, the stress can be released to a certain extent at the cutting groove A101. Because the material at the cutting groove A101 is relatively less, the stress concentration degree is reduced. When the two metals expand due to heat, in the local area near the cutting groove, the stress is more likely to concentrate on the uncut part, thus making these parts more likely to bend. Finally, it bends to form a state as shown in Figure 6 In the state shown. In this state, a relatively large gap is formed between the bimetallic strips 11, which is more conducive to large-particle particles settling along these gaps to the precipitation area 4. By setting a plurality of cutting grooves B102, and the lengths of the cutting grooves B102 decrease in sequence, the bimetallic strip 11 is inclined and bent, which is conducive to large-particle particles sliding down along the inclined surface of the bimetallic strip 11 into the precipitation area 4. Moreover, during the rotation of the rotating rod 13, it can also drive a plurality of arc-shaped pieces 17 to rotate. The rotation of the arc-shaped pieces 17 generates an outward thrust on the large-particle particles, improving the sedimentation rate of the large particles. It should be noted that it takes a certain amount of time to generate frictional heat and bend the bimetallic strip 11. During this period, the mixed gas can fully react and form large-particle particles, so that the particles in the welding fume can be fully separated.

[0040] Finally, the gas passes through the slag discharge groove 8 of the rotating shell 7 and enters the three exhaust pipes 18. The filter element 19 in the exhaust pipe 18 further conducts purification work. It should be noted that since most of the particles in the welding fume have been separated, the working burden of the filter element 19 is greatly reduced, reducing the situation where the filter element 19 needs to be replaced frequently due to blockage. Moreover, after the separation work is completed, since the rotating shell 7 is immersed in the liquid in the precipitation area 4, when the rotating shell 7 rotates, during the rotation of the multiple bimetallic strips 11, their bent parts can successively contact the liquid in the precipitation area 4, realizing rapid cooling, and thus facilitating the subsequent purification work.

[0041] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0042] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding fume purifier for an automobile girder welding table, comprising a fixed base (1) and a housing (2), characterized in that: Inside the housing (2), there are a mixing zone (3) and a sedimentation zone (4). Inside the mixing zone (3), there is a mixture of sulfur dioxide and sulfur trioxide, which is used to increase the particle size of the particles in the welding fume and separate the particles in the welding fume. Inside the sedimentation zone (4), there is a liquid chemical flocculant. The outer surface of the housing (2) is connected to an intake pipe (5) for injecting the sulfur dioxide and sulfur trioxide mixture into the mixing zone (3). The outer surface of the housing (2) is connected to an extraction pipe (6), and the extraction pipe (6) is used to convey the welding fume to the sedimentation zone (4). The other end of the extraction pipe (6) is located inside the sedimentation zone (4). The outer surface of the housing (2) is connected to an exhaust assembly for purification, and the purification assembly is used to discharge the welding fume after separating the particles. Inside the housing (2), a rotating shell (7) for rotation is rotatably installed. On the outer surface of the rotating shell (7), there are slag discharge grooves (8) for discharging large-particle impurities, and several slag discharge grooves (8) are provided. Inside the housing (2), a rotating mechanism for mixing and stirring the gas is installed. Inside the inner wall of the rotating shell (7), several fixed cylinders (9) are fixedly installed. Inside each fixed cylinder (9), a rotating rod (10) is rotatably connected. On the outer surface of each fixed cylinder (9), two symmetric bimetallic strips (11) that are in close contact with the rotating rod (10) are fixedly inlaid. When each rotating rod (10) rotates, it is used to generate heat by friction with the adjacent fixed cylinder (9) and bimetallic strip (11). Inside each bimetallic strip (11), several cutting grooves A (101) and several cutting grooves B (102) are formed, and a star-shaped structure is formed between several bimetallic strips (11).

2. The welding fume purifier for an automobile beam welding table according to claim 1, wherein: Both the fixed cylinder (9) and the rotating rod (10) are made of copper alloy material.

3. The welding fume purifier for an automobile girder welding table according to claim 1, wherein: The rotating mechanism includes a motor (12), a rotating rod (13), a turntable (14), a toothed ring (15), several gears (16) and several arc-shaped pieces (17). The motor (12) is fixedly connected to the housing (2), and the output end of the motor (12) is fixedly connected to one end of the rotating rod (13). The rotating rod (13) is rotatably connected to the housing (2), and the intersection of the two is sealed. The other end of the rotating rod (13) is fixedly connected to the turntable (14). The turntable (14) is rotatably connected to the housing (2). The toothed ring (15) is located inside the turntable (14) and is fixedly connected to the housing (2). Each gear (16) is meshed with the toothed ring (15), and multiple gears (16) are respectively fixedly connected to multiple rotating rods (10). Each arc-shaped piece (17) is fixedly connected to the rotating rod (13). Each rotating rod (10) is rotatably connected to the turntable (14). When the turntable (14) rotates, it is used to drive multiple rotating rods (10) to rotate circumferentially.

4. The welding fume purifier for an automobile girder welding table according to claim 1, characterized in that: The bottom of the rotating shell (7) is immersed in the sedimentation zone (4).

5. The welding fume purifier for an automobile girder welding table according to claim 1, wherein: Each exhaust assembly includes an exhaust pipe (18) and a filter element (19) for purifying the welding fume. The filter element (19) is installed inside the exhaust pipe (18), and the two are detachable. The exhaust pipe (18) is connected to the housing (2).

6. The welding fume purifier for an automobile beam welding table according to claim 1, characterized in that: The cutting grooves A (101) and cutting grooves B (102) in each of the bimetallic strips (11) are arranged staggeredly, and the lengths of the cutting grooves B (102) decrease in sequence.

7. The welding fume purifier for an automobile girder welding table according to claim 1 or 6, characterized in that: Each of the bimetallic strips (11) includes a copper sheet (103) and an iron sheet (104) that are attached to each other.

8. The welding fume purifier for an automobile girder welding table according to claim 1, wherein: One end of each of the bimetallic strips (11) is fixedly connected with a sealing strip (20), and an arc-shaped elastic pad (21) is fixedly connected between every two sealing strips (20). The inside of the elastic pad (21) is arranged in a fine pore structure, and the fine pore structure is used for passing gas.

9. The welding fume purifier for an automobile girder welding table according to claim 1, characterized in that: A support plate (22) is fixedly connected between every two of the bimetallic strips (11).

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