A high-efficiency multi-layer filtering structure of a welding fume purifier

Abstract

The utility model discloses a kind of high-efficiency multilayer filter structure of welding fume purifier, belong to welding fume purifier field, including box and door, by the filter mechanism set in box, using the multilayer filter structure including primary prefilter screen, middle-stage fine filter screen, high-efficiency gas filter screen, end safety filter screen, each filter screen division of labor and cooperation, from coarse to fine realize the staged purification to welding fume, primary prefilter screen is made of coarse-efficiency polypropylene fiber filter material, can quickly intercept large particle welding slag;Middle-stage fine filter screen uses polyester fiber filter material, can capture fine particulate matter;High-efficiency gas filter screen removes harmful gas using activated carbon adsorption filter material;End safety filter screen intercepts nanometer grade particle with borosilicate fiber filter material, layer by layer filtration ensures that the gas after purification is stable and meets the occupational health standards, effectively protects the health of operator, and can achieve the purpose of realizing high-efficiency multilayer filtration treatment to welding fume, thereby improve the filtration effect to welding fume.

Description

Technical Field

[0001] This utility model relates to the field of welding fume purifiers, and in particular to a high-efficiency multi-layer filtration structure for welding fume purifiers. Background Technology

[0002] Welding fume purifiers are air purification devices specifically designed for welding work environments. They actively collect and purify fumes, metal particles, and harmful gases (such as ozone and nitrogen oxides) generated during welding through a high-efficiency filtration system (such as pre-filtration to intercept large particles and main filtration using HEPA or activated carbon filters to capture fine particles and harmful gases). This effectively reduces the concentration of pollutants in the workplace, protects the respiratory health of operators, reduces the risk of equipment corrosion, and meets environmental emission requirements. They are suitable for industrial scenarios with intensive welding operations, such as machinery manufacturing, shipbuilding, and automobile repair.

[0003] In the prior art, a Chinese utility model patent with publication number "CN220310044U" and patent name "A Multi-stage Filter Welding Fume Purifier" discloses a welding fume purifier. The patent describes a technical solution including "a purification box, a door on the front outer surface of the purification box, a suction hose on the upper outer surface of the purification box, casters on the lower outer surface of the purification box, a water tank on one side outer surface of the purification box, a suction head on one end of the suction hose, a central plate in the middle of the purification box, an exhaust fan on the lower outer surface of the central plate, a filter cylinder on the upper outer surface of the central plate, a controller on the front outer surface of the water tank, a water inlet and a booster pump on the upper outer surface of the water tank, the water inlet being located on one side of the booster pump, a water guide pipe on one end of the booster pump, an annular water pipe on the inner wall of the suction head, and a spray head on the outer wall of the annular water pipe".

[0004] Although this welding fume purifier combines physical filtration and water mist adsorption, the following problems still exist in practical applications:

[0005] On the one hand, relying solely on a combination of a single filter cartridge and atomizing spray is insufficient to effectively address the complex pollutant composition in welding fumes. For example, the purification effect on nanoscale metal oxide particles, high concentrations of ozone, and nitrogen oxides is poor, making it difficult for the purified gas to consistently meet occupational health standards.

[0006] On the other hand, traditional filter cartridges are mostly installed by bolt fastening. The disassembly and assembly process requires repeated disassembly with the help of tools, which not only consumes a lot of manpower and time costs, but also frequently operates and is prone to thread wear, affecting the sealing of the equipment and causing a decrease in purification efficiency.

[0007] Therefore, in order to solve the above-mentioned technical problems, this utility model proposes a high-efficiency multi-layer filtration structure for welding fume purifier. Utility Model Content

[0008] The main objective of this invention is to provide a high-efficiency multi-layer filtration structure for welding fume purifiers, which can effectively solve the problems in the background art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A high-efficiency multi-layer filtration structure for a welding fume purifier includes a housing and a door. A universal suction arm is fixedly connected to the top surface of the housing, and a suction hood is fixedly connected to the other end of the universal suction arm. A fan is also fixedly connected inside the housing. A filtration mechanism is located inside the housing and above the fan. The filtration mechanism includes a primary pre-filter, a secondary fine filter, a high-efficiency gas filter, a final safety filter, a fixing rod, a spring, an L-shaped pull plate, and a locking rod. A set of symmetrical fixing rods is fixedly connected to the inner wall of the front end of each of the primary pre-filter, secondary fine filter, high-efficiency gas filter, and final safety filter. The spring is sleeved on the outside of the fixing rod. The L-shaped pull plate is movably connected to the fixing rod through a connecting block at the rear end, and the locking rod is fixedly connected to the side wall of the L-shaped pull plate.

[0011] Furthermore, four concave frames are fixedly installed on the inner wall of the box in a vertical array, and positioning support strips are fixedly installed on the left and right side walls of the concave frames respectively.

[0012] Furthermore, the concave frame has locking holes on the left and right side walls inside the recess and in front of the positioning support strip.

[0013] Furthermore, the primary pre-filter is made of coarse polypropylene fiber filter material, the intermediate fine filter is made of polyester fiber filter material, the high-efficiency gas filter is made of activated carbon adsorption filter material, and the final safety filter is made of borosilicate fiber filter material. The primary pre-filter, intermediate fine filter, high-efficiency gas filter, and final safety filter are respectively provided with positioning grooves on their left and right side walls and are inserted into the corresponding concave frames from top to bottom through the positioning grooves.

[0014] Furthermore, the front end walls of the primary pre-filter, intermediate fine filter, high-efficiency gas filter, and terminal safety filter are each provided with a set of symmetrical transverse grooves, and the top and bottom surfaces of the transverse grooves are respectively provided with sliding grooves.

[0015] Furthermore, the fixing rod is fixedly installed in the transverse groove, and the spring is sleeved on the outside of the fixing rod. A connecting block is fixedly installed on the rear end wall of the vertical part of the L-shaped pull plate, and a connecting hole is opened on the side wall of the connecting block. The connecting block is movably installed together with the fixing rod through the connecting hole, and the spring is fixedly installed between the connecting block and the opposite wall of the transverse groove. A slider is also fixedly installed on the top and bottom surfaces of the connecting block, and the slider is movably installed in the slide groove. The locking rod is fixedly installed on the outer side wall of the vertical part of the L-shaped pull plate, and the locking rod is inserted into the locking hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this invention, a multi-layered filtration structure is employed within the housing, comprising a primary pre-filter, a secondary fine filter, a high-efficiency gas filter, and a final safety filter. Each filter works collaboratively to achieve graded purification of welding fumes, from coarse to fine. The primary pre-filter, composed of coarse-efficiency polypropylene fiber filter material, quickly intercepts large welding slag particles. The secondary fine filter, made of polyester fiber filter material, captures fine particulate matter. The high-efficiency gas filter utilizes activated carbon adsorption material to remove harmful gases. The final safety filter uses borosilicate fiber filter material to intercept nano-sized particles. This multi-layered filtration ensures that the purified gas consistently meets occupational health standards, effectively protecting the health of operators and achieving efficient multi-layered filtration of welding fumes, thereby improving the filtration effect.

[0018] Meanwhile, the primary pre-filter, intermediate fine filter, and other filters are initially positioned by the positioning groove and concave frame. With the linkage structure of spring, L-shaped pull plate, and locking rod, pulling the L-shaped pull plate can disengage the locking rod from the locking hole, making it easy to disassemble the filter. Installation is done by reversing the operation. No tools are required, which greatly saves disassembly and assembly time and labor costs. At the same time, it avoids thread wear, ensures the equipment's sealing performance and long-term stable operation, reduces maintenance costs, and facilitates quick disassembly, replacement, or cleaning of the filter structure. Attached Figure Description

[0019] Figure 1 This is a front view schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a rear view schematic diagram of the overall structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the overall structure of the concave frame of this utility model;

[0022] Figure 4 This is a structural breakdown diagram of the high-efficiency gas filter of this utility model.

[0023] In the diagram: 1. Housing; 2. Door; 3. Universal suction arm; 4. Dust hood; 5. Fan; 6. Filter mechanism; 7. Primary pre-filter; 8. Intermediate fine filter; 9. High-efficiency gas filter; 10. Terminal safety filter; 11. Concave frame; 12. Positioning support bar; 13. Locking hole; 14. Positioning groove; 15. Horizontal groove; 16. Slide groove; 17. Fixing rod; 18. Spring; 19. L-shaped pull plate; 20. Connecting block; 21. Connecting hole; 22. Slider; 23. Locking rod. Detailed Implementation

[0024] The technical solution of this utility model is described in further detail below with reference to the accompanying drawings, but the scope of protection of this utility model is not limited to the following description.

[0025] like Figure 1 - Figure 4 As shown, a high-efficiency multi-layer filtration structure for a welding fume purifier includes a housing 1 and a door 2. A universal suction arm 3 is fixedly connected to the top surface of the housing 1, and a suction hood 4 is fixedly connected to the other end of the universal suction arm 3. A fan 5 is also fixedly connected inside the housing 1. A filtration mechanism 6 is provided inside the housing 1 and above the fan 5. The filtration mechanism 6 includes a primary pre-filter 7, a secondary fine filter 8, a high-efficiency gas filter 9, a terminal safety filter 10, a fixing rod 17, a spring 18, an L-shaped pull plate 19, and a locking rod 23. A set of symmetrical fixing rods 17 are fixedly connected to the inner walls of the front ends of the primary pre-filter 7, the secondary fine filter 8, the high-efficiency gas filter 9, and the terminal safety filter 10, respectively. The spring 18 is sleeved on the outside of the fixing rod 17. The L-shaped pull plate 19 is movably connected to the fixing rod 17 through a connecting block 20 at the rear end, and the locking rod 23 is fixedly connected to the side wall of the L-shaped pull plate 19.

[0026] like Figure 3 As shown, four concave frames 11 are fixedly installed in a vertical array on the inner wall of the housing 1, and positioning support strips 12 are fixedly installed on the left and right side walls of the concave frames 11. The positioning support strips 12 on the left and right side walls of the four concave frames 11 installed in a vertical array on the inner wall of the housing 1 provide an installation support structure for the primary pre-filter 7, the intermediate fine filter 8, the high-efficiency gas filter 9, and the terminal safety filter 10. The positioning grooves 14 on the left and right side walls of the filter screen cooperate with the positioning support strips 12 to enable the filter screen to be accurately inserted into the concave frame 11 and achieve preliminary positioning.

[0027] like Figure 3As shown, the left and right side walls of the recess of the concave frame 11, in front of the positioning support bar 12, are provided with locking holes 13. The locking holes 13 on the left and right side walls of the recess of the concave frame 11, in front of the positioning support bar 12, cooperate with the locking rod 23 on the L-shaped pull plate 19 to fix the filter screen. When the filter screen is inserted into the concave frame 11, the L-shaped pull plate 19 is pulled, and the locking rod 23 is inserted into the locking hole 13 under the action of the spring 18, and the filter screen is firmly fixed in the concave frame 11.

[0028] like Figure 1 As shown, the primary pre-filter 7 is made of coarse polypropylene fiber filter media, the intermediate fine filter 8 is made of polyester fiber filter media, the high-efficiency gas filter 9 is made of activated carbon adsorption filter media, and the final safety filter 10 is made of borosilicate fiber filter media. Positioning grooves 14 are respectively provided on the left and right side walls of the primary pre-filter 7, intermediate fine filter 8, high-efficiency gas filter 9, and final safety filter 10. These are inserted into the corresponding concave frames 11 from top to bottom through the positioning grooves 14. The primary pre-filter 7 uses coarse polypropylene fiber filter media to intercept... Large particulate impurities; the intermediate fine filter 8, made of polyester fiber filter material, captures fine particulate matter; the high-efficiency gas filter 9 uses activated carbon adsorption filter material to remove harmful gases; the final safety filter 10 uses borosilicate fiber filter material to intercept nano-sized particles. These filters are sequentially inserted into the corresponding concave frames 11 from top to bottom through the positioning grooves 14 on the left and right side walls, forming a multi-layer filtration structure. Filters of different materials perform graded filtration for different pollutants in welding fumes, effectively removing various pollutants and significantly improving the purification effect of the welding fume purifier. The multi-layer filter installation structure is compact, making full use of the internal space of the housing 1, and facilitating independent replacement and maintenance of each filter, reducing maintenance costs.

[0029] like Figure 4 As shown, the front walls of the primary pre-filter 7, intermediate fine filter 8, high-efficiency gas filter 9, and terminal safety filter 10 are respectively provided with a set of left-right symmetrical transverse grooves 15, and the top and bottom surfaces of the transverse grooves 15 are respectively provided with sliding grooves 16. The transverse grooves 15 and the sliding grooves 16 on the top and bottom surfaces of the transverse grooves 15 cooperate with the connecting block 20 and the slider 22 on the L-shaped pull plate 19. The connecting block 20 is sleeved on the fixed rod 17 through the connecting hole 21, and the slider 22 is installed in the sliding groove 16, so that the L-shaped pull plate 19 can slide stably in the transverse groove 15.

[0030] like Figure 4As shown, the fixing rod 17 is fixedly installed inside the transverse groove 15, and the spring 18 is fitted onto the outside of the fixing rod 17. A connecting block 20 is fixedly installed on the rear wall of the vertical part of the L-shaped pull plate 19, and a connecting hole 21 is provided on the side wall of the connecting block 20. The connecting block 20 is movably installed together with the fixing rod 17 through the connecting hole 21, and the spring 18 is fixedly installed between the connecting block 20 and the opposite wall of the transverse groove 15. A slider 22 is also fixedly installed on the top and bottom surfaces of the connecting block 20, and the slider 22 is movably installed in the slide groove 16. The locking rod 23 is fixed. Installed on the outer wall of the vertical part of the L-shaped pull plate 19, with the locking rod 23 inserted into the locking hole 13, when the L-shaped pull plate 19 is pulled, the connecting block 20 slides on the fixed rod 17 and compresses the spring 18, causing the locking rod 23 to disengage from the locking hole 13; when the L-shaped pull plate 19 is released, the spring 18 returns to its original position and pushes the connecting block 20, causing the locking rod 23 to insert into the locking hole 13. The linkage structure of the spring 18, the connecting block 20 and the locking rod 23 enables the quick fixing and disassembly of the filter screen, which can be completed without tools, greatly improving the efficiency of filter screen maintenance and reducing the difficulty of maintenance.

[0031] The working principle of the high-efficiency multi-layer filtration structure of this welding fume purifier is as follows:

[0032] First, the dust hood 4 at the front end of the universal suction arm 3 captures the mixed gas containing a large amount of smoke, metal particles and harmful gases generated during the welding operation. Due to the continuous operation of the fan 5 inside the housing 1, the mixed gas is quickly sucked into the housing 1 through the universal suction arm 3 and then enters the filter mechanism 6 located above the fan 5 for purification.

[0033] After the mixed gas enters the filtration mechanism 6, it passes through four layers of filters with different functions from top to bottom. The first layer is the primary pre-filter 7, which is composed of coarse polypropylene fiber filter material. Utilizing its large pore size and fiber structure, it quickly intercepts large-diameter particulate pollutants such as welding slag and spatter through inertial impaction and direct interception principles, completing preliminary filtration and reducing the processing load of subsequent filters. The gas passing through the primary pre-filter 7 continues to descend and enters the intermediate fine filter 8, which is composed of polyester fiber filter material. This filter captures fine particulate matter with a particle size in the PM2.5-PM10 range through Brownian diffusion, interception effect, and inertial impaction. After completing the filtration of solid particulate matter, the gas passes through the high-density filter. The gas filter 9 uses activated carbon adsorption filter material. With the rich microporous structure and strong adsorption capacity of activated carbon, it effectively adsorbs harmful gas components such as ozone, nitrogen oxides, and volatile organic compounds in the mixed gas. Finally, the gas that has passed through the first three filtration stages passes through the final safety filter 10, which is made of borosilicate fiber filter material. This filter, with its fine fiber structure and high-efficiency filtration performance, intercepts nano-sized particles. Finally, the filtered gas is discharged from the housing 1 through the fan 5, ensuring that the finally discharged gas meets occupational health standards and environmental emission requirements, so as to achieve the purpose of efficient multi-layer filtration treatment of welding fumes, thereby improving the filtration effect of welding fumes.

[0034] When it is necessary to disassemble, replace, or clean the filter mechanism 6 inside the housing 1 to ensure the filtration effect, after opening the housing door 2, remove the primary pre-filter 7, intermediate fine filter 8, high-efficiency gas filter 9, and final safety filter 10 from the housing 1 in sequence. During disassembly, manually hold the symmetrical L-shaped pull plates 19 in front of the filter and pull them in opposite directions. This will cause the connecting block 20 to move synchronously inward through the connecting hole 21 on the side wall along the fixing rod 17 in the transverse groove 15. The slider 22 will slide in the slide groove 16, forcing the spring 18 fitted outside the fixing rod 17 to tighten until the locking rod 23 installed on the outer wall of the vertical part of the L-shaped pull plate 19 moves out of the locking hole 13. Maintain the pulling force on the L-shaped pull plate 19 unchanged and pull the filter out of the concave frame 11. To complete the disassembly of the filter screen, after disassembly and cleaning or when replacing and installing, manually pull the L-shaped pull plate 19 in the opposite direction to move the locking rod 23 to the inside of the positioning groove 14. Keep the pulling force on the L-shaped pull plate 19 unchanged, and lift the filter screen through the L-shaped pull plate 19 and insert it into the concave frame 11. After insertion, the positioning support bar 12 is inserted into the positioning groove 14, which can position and support the filter screen. Finally, release the pulling force on the L-shaped pull plate 19, and the spring 18 elastically recovers and pushes the connecting block 20 to move the L-shaped pull plate 19, so that the locking rod 23 is inserted into the locking hole 13. This completes the installation and fixing of the filter screen. Ensure that the primary pre-filter 7, intermediate fine filter 8, high-efficiency gas filter 9 and terminal safety filter 10 are installed correctly from top to bottom.

[0035] In the description of this utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," and "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, it will be understood by those skilled in the art that the beneficial effects to be achieved by this utility model are merely to achieve better beneficial effects compared with the current implementation schemes in the prior art under specific conditions, rather than to directly achieve the best use effect in the industry.

[0036] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A high-efficiency multi-layer filtration structure for a welding fume purifier, comprising a housing (1) and a door (2), wherein a universal suction arm (3) is fixedly connected to the top surface of the housing (1), and a suction hood (4) is fixedly connected to the other end of the universal suction arm (3), and a fan (5) is fixedly connected inside the housing (1), characterized in that: The housing (1) is equipped with a filter mechanism (6) located inside and above the fan (5). The filter mechanism (6) includes a primary pre-filter (7), a secondary fine filter (8), a high-efficiency gas filter (9), a terminal safety filter (10), a fixing rod (17), a spring (18), an L-shaped pull plate (19), and a locking rod (23). A set of symmetrical fixing rods (17) are fixedly connected to the inner walls of the front ends of the primary pre-filter (7), the secondary fine filter (8), the high-efficiency gas filter (9), and the terminal safety filter (10). The spring (18) is sleeved on the outside of the fixing rod (17). The L-shaped pull plate (19) is movably connected to the fixing rod (17) through the connecting block (20) at the rear end. The locking rod (23) is fixedly connected to the side wall of the L-shaped pull plate (19).

2. The high-efficiency multi-layer filtration structure of a welding fume purifier according to claim 1, characterized in that: Four concave frames (11) are fixedly installed on the inner wall of the box (1) in a vertical array, and positioning support strips (12) are fixedly installed on the left and right side walls of the concave frames (11).

3. The high-efficiency multi-layer filtration structure of a welding fume purifier according to claim 2, characterized in that: The concave frame (11) has a locking hole (13) on the left and right sides of the recess and in front of the positioning support bar (12).

4. The high-efficiency multi-layer filtration structure of a welding fume purifier according to claim 3, characterized in that: The primary pre-filter (7) is made of coarse polypropylene fiber filter material, the intermediate fine filter (8) is made of polyester fiber filter material, the high-efficiency gas filter (9) is made of activated carbon adsorption filter material, and the terminal safety filter (10) is made of borosilicate fiber filter material. The primary pre-filter (7), intermediate fine filter (8), high-efficiency gas filter (9) and terminal safety filter (10) are respectively provided with positioning grooves (14) on their left and right side walls and are inserted into the corresponding concave frame (11) from top to bottom through the positioning grooves (14).

5. The high-efficiency multi-layer filtration structure of a welding fume purifier according to claim 4, characterized in that: The primary pre-filter (7), intermediate fine filter (8), high-efficiency gas filter (9) and end safety filter (10) are each provided with a set of left-right symmetrical transverse grooves (15), and the top and bottom surfaces of the transverse grooves (15) are provided with sliding grooves (16).

6. The high-efficiency multi-layer filtration structure of a welding fume purifier according to claim 5, characterized in that: The fixing rod (17) is fixedly installed in the transverse groove (15), and the spring (18) is fitted on the outside of the fixing rod (17). A connecting block (20) is fixedly installed on the rear wall of the vertical part of the L-shaped pull plate (19), and a connecting hole (21) is opened on the side wall of the connecting block (20). The connecting block (20) is movably installed together with the fixing rod (17) through the connecting hole (21), and the spring (18) is fixedly installed between the connecting block (20) and the opposite wall of the transverse groove (15). A slider (22) is also fixedly installed on the top and bottom surfaces of the connecting block (20), and the slider (22) is movably installed in the slide groove (16). The clamping rod (23) is fixedly installed on the outer wall of the vertical part of the L-shaped pull plate (19), and the clamping rod (23) is inserted into the clamping hole (13).

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