Waste gas treatment device and method for steel structure welding

Abstract

The invention relates to the technical field of waste gas treatment equipment, in particular to a waste gas treatment device for steel structure welding and a method thereof.The top of a cloth bag filtering bin is provided with a top base, the upper end of the top base is provided with a top cover, the top base is provided with a plurality of air holes located in the top cover, and the upper end of the top base is provided with a first motor; a first cleaning shaft inserted into the dust collection cloth bag is arranged at the output end of the first motor, and a first cleaning brush making contact with the inner wall of the dust collection cloth bag is arranged on the first cleaning shaft. And meanwhile, a first cleaning shaft drives fan blades on a fixed shaft to rotate through cooperation of a driving gear and a driven gear, wind power is generated to assist in collecting cleaned impurities into a material collecting barrel, the manual cleaning frequency is reduced, and continuous and efficient filtering of the dust collecting cloth bag is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment equipment, and in particular to a waste gas treatment device for steel structure welding and a method thereof. Background Art

[0002] During the welding process of steel structures, a large amount of toxic and harmful fumes will be produced. The waste gas mainly includes metal oxides. Under the high temperature of welding, the metal elements in the steel (such as iron, manganese, chromium, nickel, etc.) will undergo oxidation reactions to form corresponding metal oxide fumes. Taking common carbon steel welding as an example, a large amount of iron oxide (Fe2O3, Fe3O4, etc.) fumes will be produced; and when welding stainless steel, in addition to iron oxides, metal oxides such as chromium (Cr) and nickel (Ni) will also be produced, such as chromium trioxide (Cr2O3), etc. These metal oxide fumes have a small particle size and are easily inhaled by the human body. Long-term exposure may cause damage to the respiratory system and lungs. In order to avoid polluting the air and causing physical harm to workers, waste gas treatment equipment is needed to treat welding fumes.

[0003] Prior art 1 (application number: 201010177243.4, Chinese patent application date: May 18, 2010) discloses a welding waste gas treatment device, which includes an air inlet pipe, an air outlet pipe, and an exhaust gas treatment chamber, a primary filter chamber, and an exhaust gas adsorption chamber sequentially connected between the air inlet pipe and the air outlet pipe. The present invention uses a multi-stage purification device to purify welding waste gas, ensuring that no secondary pollution is generated, no impact on workshop operations, and no impact on the life of the equipment. This device can effectively remove welding fume and waste gas, and can also degrade welding fume tar odor and various toxic and harmful gases. It uses a combination of physical and chemical methods to treat welding waste gas or industrial waste gas, providing a more comprehensive and efficient treatment of welding waste gas or industrial waste gas. It is simple, economical, and affordable in actual use.

[0004] Prior art 2 (application number: 202310039926.0, Chinese patent with application date of 2023-01-13) discloses a welding waste gas treatment device, which belongs to the technical field of waste gas treatment devices, and includes a welding table, a supporting block, a positioning block, a dust hood, a collection tank, a filter, an exhaust fan and a first connecting pipe. The supporting block is arranged on the welding table. The positioning block is fixed on the supporting block. The lower end of the dust hood is an open end and is fixedly connected to the welding table. The collection tank is fixedly connected to the welding table, and an air vent is provided on the collection tank. The filter is located in the collection tank and is fixedly connected to the collection tank, and the filter covers the air vent. The exhaust fan is fixed on the collection tank, and the air inlet of the exhaust fan is connected to the air vent. One end of the first connecting pipe is fixed on the top wall of the dust hood and is connected to the inside of the dust hood, and the other end is fixedly connected to the collection tank and is connected to the inside of the collection tank. The welding waste gas treatment device provided by it can avoid the problem that smoke during welding will endanger the health of the operator.

[0005] During use, the existing exhaust gas treatment device for steel structure welding has a fixed structure of the filter component and lacks a certain automatic cleaning structure, which makes it easy to get clogged after a long time and affects the filtering effect of the filter component, thereby reducing the exhaust gas purification and filtration efficiency, and has certain usage defects. Summary of the Invention

[0006] (1) Technical problems solved

[0007] In view of the deficiencies in the prior art, the present invention provides an exhaust gas treatment device for steel structure welding and a method thereof.

[0008] (2) Technical solution

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an exhaust gas treatment device for steel structure welding, comprising a treatment box, a bag filter bin and an electrostatic treatment bin are provided in the treatment box, two side panels are symmetrically arranged on both sides of the bag filter bin, a plurality of support rods are provided at the lower end of the treatment box, a bottom wheel is provided at the bottom end of the support rod, an air inlet pipe is provided at the bottom of the bag filter bin, a negative pressure fan is provided at the lower end of the treatment box, a suction end of the negative pressure fan is provided with a conduit connected to the electrostatic treatment bin, an exhaust pipe is provided at the outlet end of the negative pressure fan, a dust collecting bag is provided inside the bag filter bin, a partition is provided at the bottom of the bag filter bin, a bottom pipe is vertically arranged on the partition, The bottom of the bottom tube is provided with a collecting cylinder, the collecting cylinder is threadedly connected to the bottom tube, and the top of the air inlet pipe is communicated with the bottom tube, the top of the bag filter bin is provided with a top seat, the upper end of the top seat is provided with a top cover, the top seat is provided with a plurality of air holes located inside the top cover, the lower end of the top seat is provided with a top positioning cylinder, the upper end of the bottom tube is provided with a bottom positioning cylinder located above the partition, the top and bottom of the dust collecting bag are respectively sleeved on the outer walls of the top positioning cylinder and the bottom positioning cylinder, the upper end of the top seat is provided with a first motor, the output end of the first motor is provided with a first cleaning shaft inserted into the interior of the dust collecting bag, and the first cleaning shaft is provided with a first cleaning brush that contacts the inner wall of the dust collecting bag;

[0010] The bag filter compartment is provided with a first box body and a second box body installed on the outer wall of the processing box, and the second box body is located below the first box body, and the first rotating shaft is rotatably provided in the interior of the first box body and the second box body, and two third driving bevel gear blocks are provided on the first rotating shaft, and two second rotating shafts are rotatably provided at both ends of the first box body and the second box body, and one end of the second rotating shaft is provided with a second driven bevel gear block meshing with the third driving bevel gear block, and two first screws with reverse thread structures are symmetrically provided on the second rotating shaft. Two clamping assemblies with the same structure are provided in the upper and lower parts of the bag filter compartment, and the two clamping assemblies respectively limit the top of the dust collecting bag at the top positioning cylinder and the bottom of the dust collecting bag at the bottom positioning cylinder. The clamping assembly includes two arc clamping plates symmetrically arranged on the dust collecting bag, Two positioning blocks are symmetrically provided at both ends of the arc-shaped clamping plate, and the positioning blocks are penetrated by the first screw and are threadedly connected to the first screw. A first side box is provided on one side of the first box body, and a second side box is provided on one side of the second box body. A second motor is provided at the lower end of the second side box, and an output end of the second motor is provided with a first driving shaft located inside the second side box, a first driving bevel gear block is provided on the first driving shaft, and a docking rod is provided at the upper end of the first driving shaft, a second driving shaft is rotatably arranged inside the first side box, a second driving bevel gear block is provided at the top end of the second driving shaft, and the bottom end of the second driving shaft is docked with the docking rod, and a first driven bevel gear block is provided at one end of the first rotating shaft, and the two first driven bevel gear blocks are respectively located inside the first side box and the second side box, and are respectively meshed with the second driving bevel gear block and the first driving bevel gear block;

[0011] The top of the electrostatic treatment chamber is provided with a top plate, and the top cover is connected to the electrostatic treatment chamber through a transfer tube, the interior of the electrostatic treatment chamber is provided with a plurality of corona electrodes, and the symmetrical corona electrodes are provided with two anode plates installed on the inner wall of the electrostatic treatment chamber, two fixed frames are symmetrically arranged inside the electrostatic treatment chamber, one end of the fixed frame is provided with a fifth motor, the output end of the fifth motor is provided with a second cleaning shaft, and the second cleaning shaft is provided with a second cleaning brush that contacts the anode plate, a guide block is provided on one side of the fixed frame, the top of the electrostatic treatment chamber is provided with a plurality of limit blocks, the lower end of the limit block is provided with a guide rod that penetrates the guide block, and the guide block is slidably matched with the guide rod, a fourth motor located on one side of the electrostatic treatment chamber is provided on the outer wall of the treatment box, the output end of the fourth motor is provided with a motor shaft inserted into the interior of the electrostatic treatment chamber, one end of the motor shaft is provided with a driving rod, two slide grooves are symmetrically arranged on the driving rod, and one side of the fixed frame is provided with a cylindrical block inserted into the interior of the slide groove and slidably matched with the slide groove;

[0012] A drawer slot is provided at the bottom of the electrostatic treatment chamber, a supporting frame is provided inside the drawer slot, and a filter plate is provided at the bottom of the supporting frame.

[0013] In order to improve the cleaning effect of the dust collecting bag, the improvements of the present invention are that a bracket is fixedly arranged inside the top positioning cylinder, the first cleaning shaft passes through the bracket and is rotatably connected to the bracket, a plurality of fixed shafts are rotatably arranged on the bracket, the bottom of the fixed shaft is provided with fan blades, the top of the fixed shaft is provided with a driven gear, and the top of the first cleaning shaft is provided with a driving gear meshing with the driven gear.

[0014] The lifting of the ...

[0015] In order to improve the cleaning effect of the anode plate, the improvements of the present invention are that a positive pressure fan and a bellows fixed on the outer wall of the processing box are provided above the fourth motor, two air outlet plates close to the anode plates are symmetrically arranged on the top of the electrostatic treatment chamber, and a plurality of air outlet holes are provided at the lower end of the air outlet plate. The air outlet end of the positive pressure fan is connected to the bellows through a first air duct, and a second air duct inserted into the inside of the air outlet plate is provided at both ends of the bellows.

[0016] Furthermore, the present invention is improved in that the multiple arc-shaped plates have the same size and are all semicircular structures.

[0017] A method for treating waste gas from a waste gas treatment device for steel structure welding according to any one of claims 1 to 5, comprising the following steps:

[0018] Step 1: Start the negative pressure fan to generate suction at the air inlet pipe. The exhaust gas from steel structure welding enters the bottom pipe through the air inlet pipe and then enters the dust collecting bag through the bottom pipe.

[0019] Step 2: The dust bag can filter the exhaust gas from steel structure welding, so that the impurities in the exhaust gas adhere to the inner wall of the dust bag. The filtered exhaust gas enters the top cover through the air vents, and then enters the electrostatic treatment chamber through the transfer pipe;

[0020] Step 3: The filtered steel structure welding waste gas is charged by the corona electrode in the electrostatic treatment chamber and then adsorbed onto the anode plate;

[0021] Step 4: The treated exhaust gas passes through the filter plate and is discharged to the designated location through the exhaust pipe.

[0022] Furthermore, the improvement of the present invention is that, in the first step, the two ends of the dust collecting bag are first put on the outer walls of the top positioning cylinder and the bottom positioning cylinder respectively, and then the second motor is started. At this time, the first driving shaft will drive the second driving shaft to rotate, and then the first driving bevel gear block and the second driving bevel gear block will rotate, further making the two first rotating shafts rotate synchronously. During the rotation of the first rotating shaft, the cooperation of the third driving bevel gear block and the second driven bevel gear block will make the four second rotating shafts in the bag filter bin rotate synchronously, and at this time the two arc-shaped clamping plates at the top of the bag filter bin will move toward each other, and the two arc-shaped clamping plates at the bottom of the bag filter bin will move toward each other, thereby fixing the top of the dust collecting bag on the top positioning cylinder, and fixing the bottom of the dust collecting bag on the bottom positioning cylinder.

[0023] Furthermore, the improvement of the present invention is that after the top of the dust bag is fixed, the bottom of the dust bag is pulled so that the bottom of the dust bag is between the arc plate and the arc clamping plate. At this time, the locking rod is rotated so that one end of the locking rod contacts the dust bag, and then the third motor is started, which will cause the second box to move downward along the guide rail so that the second side box and the second box move downward synchronously. At this time, the docking rod will extend in the positioning groove, so that the docking rod and the second drive shaft are stably docked, and further the second rotating shaft at the bottom of the bag filter bin slides downward in the empty groove, providing a stretching effect on the dust bag, so that the dust bag is installed more tightly in the bag filter bin.

[0024] Furthermore, the present invention has the following improvements: the first motor is started to rotate the first cleaning shaft, at which time the fixed shaft drives the fan blade to rotate through the cooperation of the driving gear and the driven gear, and the inner wall of the dust collecting bag can be cleaned by the first cleaning brush, and the wind force generated by the fan blade is used to collect the cleaned impurities in the collecting barrel;

[0025] Start the fourth motor to make the driving rod rotate back and forth, and the rotation angle is less than 90 degrees. At this time, the cylindrical block will slide back and forth in the slide groove, and the fixed frame will rise and fall back and forth along the guide rod. At this time, start the fifth motor to rotate the second cleaning shaft, so that the second cleaning brush cleans the impurities on the outer wall of the anode plate. At this time, start the positive pressure fan to blow air downward from multiple air outlets, so that the cleaned impurities fall onto the filter plate on the carrier frame.

[0026] (3) Beneficial effects

[0027] Compared with the prior art, the present invention provides a steel structure welding exhaust gas treatment device and method thereof, which has the following beneficial effects:

[0028] Automatic cleaning function: In order to solve the problem that the filter assembly in the prior art is easily clogged and lacks an automatic cleaning structure, the present invention sets a complete automatic cleaning mechanism. In the bag filter bin, the first motor drives the first cleaning shaft and the first cleaning brush to rotate to clean the inner wall of the dust bag. At the same time, the first cleaning shaft drives the fan blades on the fixed shaft to rotate through the cooperation of the driving gear and the driven gear, generating wind power to assist in collecting the cleaned impurities into the collection barrel, reducing the frequency of manual cleaning and ensuring continuous and efficient filtration of the dust bag.

[0029] In the electrostatic treatment chamber, the fourth motor drives the driving rod to rotate, causing the fixed frame to move back and forth along the guide rod. The fifth motor drives the second cleaning shaft and the second cleaning brush to clean the anode plate. The positive pressure fan blows air downward through the bellows and the air outlet plate, blowing the cleaned impurities onto the filter plate of the carrier frame, ensuring the adsorption effect of the anode plate and maintaining the high efficiency of the electrostatic treatment.

[0030] Convenient installation and maintenance: The installation design of the dust bag is ingenious and convenient. By starting the second motor and utilizing a series of bevel gear blocks and rotating shafts to move the arc-shaped clamping plates at the top and bottom of the bag filter bin toward each other, the two ends of the dust bag are fixed on the top positioning cylinder and the bottom positioning cylinder respectively. When the top of the dust bag is fixed, pull the bottom so that it is located between the arc-shaped plate and the arc-shaped clamping plate, rotate the locking rod to contact the dust bag, and then start the third motor to move the second box body downward along the guide rail, driving the second rotating shaft at the bottom of the bag filter bin to slide downward in the empty slot, stretching the dust bag and making its installation tighter, which not only improves the filtering effect but also facilitates subsequent cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0032] Figure 2 is a schematic diagram of the third perspective structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the three-dimensional structure from a third viewing angle of the present invention;

[0034] Figure 4 is a schematic diagram of a third perspective structure of the present invention;

[0035] Figure 5 For the present invention Figure 3 Side view of;

[0036] Figure 6 For the present invention Figure 3 A top view of

[0037] Figure 7 Schematic diagram of the installation structure of the dust collecting bag in the present invention;

[0038] Figure 8 Schematic diagram of the installation structure of the fixing bracket in the present invention;

[0039] Figure 9 Schematic diagram of the structure of the driving rod in the present invention;

[0040] Figure 10 Schematic diagram of the matching structure of the driving gear and the driven gear in the present invention;

[0041] Figure 11 Schematic diagram of the mounting structure of the bracket in the present invention;

[0042] Figure 12 Schematic diagram of the installation structure of the fan blades in the present invention;

[0043] Figure 13 Schematic diagram of the installation structure of the filter plate in the present invention;

[0044] Figure 14 Schematic diagram of the matching structure of the second driving bevel gear block and the first driven bevel gear block in the present invention;

[0045] Figure 15 Schematic diagram of the cooperation structure between the second drive shaft and the docking rod in the present invention;

[0046] Figure 16 Schematic diagram of the matching structure between the first driving shaft and the docking rod in the present invention;

[0047] In the figure: 1. treatment box; 2. bag filter chamber; 3. electrostatic treatment chamber; 4. support rod; 5. bottom wheel; 6. air inlet pipe; 7. negative pressure fan; 8. conduit; 9. exhaust pipe; 10. dust collecting bag; 11. top cover; 12. top seat; 13. air vent; 14. adapter tube; 15. top plate; 16. top positioning cylinder; 17. bracket; 18. first cleaning shaft; 19. fixed shaft; 20. driving gear; 21. driven gear; 22. fan blade; 23. first cleaning brush; 24. bottom positioning cylinder; 25. bottom pipe; 26. collecting barrel; 27. first box body; 28. first side box; 29. ​​second box body; 30. second side box; 31. arc clamping plate; 32. positioning block; 33. second rotating shaft; 34. first screw; 35. second driven bevel gear block; 36 , first rotating shaft; 37, third driving bevel gear block; 38, first driven bevel gear block; 39, second driving shaft; 40, second driving bevel gear block; 41, first driving shaft; 42, first driving bevel gear block; 43, docking rod; 44, second motor; 45, third motor; 46, third rotating shaft; 47, second screw; 48, fixed seat; 49, guide rail; 50, anode plate; 51, corona electrode; 52, fixed frame; 53, fifth motor; 54, second cleaning shaft; 55, cylindrical block; 56, fourth motor; 57, driving rod; 58, guide rod; 59, positive pressure fan; 60, air outlet plate; 61, bellows; 62, slide; 63, side panel; 64, first motor; 65, drawer slot; 66, carrier frame; 67, empty slot; 68, arc plate; 69, locking rod. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] See also Figure 1-16The exhaust gas treatment device for steel structure welding of the present invention comprises a treatment box 1, wherein a bag filter bin 2 and an electrostatic treatment bin 3 are provided in the treatment box 1, two side plates 63 are symmetrically arranged on both sides of the bag filter bin 2, a plurality of support rods 4 are provided at the lower end of the treatment box 1, a bottom wheel 5 is provided at the bottom end of the support rod 4, an air inlet pipe 6 is provided at the bottom of the bag filter bin 2, a negative pressure fan 7 is provided at the lower end of the treatment box 1, an air suction end of the negative pressure fan 7 is provided with a conduit 8 connected to the electrostatic treatment bin 3, an air outlet end of the negative pressure fan 7 is provided with an exhaust pipe 9, a dust collecting bag 10 is provided inside the bag filter bin 2, a partition is provided at the bottom of the bag filter bin 2, a bottom pipe 25 is vertically arranged on the partition, a collecting barrel 26 is provided at the bottom of the bottom pipe 25, and the collecting barrel 26 is threadedly connected to the bottom tube 25, and the top end of the air inlet pipe 6 is communicated with the bottom tube 25, the top of the bag filter bin 2 is provided with a top seat 12, the upper end of the top seat 12 is provided with a top cover 11, the top seat 12 is provided with a plurality of air vents 13 located inside the top cover 11, the lower end of the top seat 12 is provided with a top positioning cylinder 16, the upper end of the bottom tube 25 is provided with a bottom positioning cylinder 24 located above the partition, the top and bottom of the dust collecting bag 10 are respectively sleeved on the outer walls of the top positioning cylinder 16 and the bottom positioning cylinder 24, the upper end of the top seat 12 is provided with a first motor 64, the output end of the first motor 64 is provided with a first cleaning shaft 18 inserted into the interior of the dust collecting bag 10, and the first cleaning shaft 18 is provided with a first cleaning brush 23 that contacts the inner wall of the dust collecting bag 10;

[0050] One side of the bag filter bin 2 is provided with a first box body 27 and a second box body 29 mounted on the outer wall of the processing box 1, and the second box body 29 is located below the first box body 27, and a first rotating shaft 36 is rotatably provided inside the first box body 27 and the second box body 29, and two third driving bevel gear blocks 37 are provided on the first rotating shaft 36, and two second rotating shafts 33 are rotatably provided at both ends of the first box body 27 and the second box body 29, and one end of the second rotating shaft 33 is provided with a second driven bevel gear block 35 meshing with the third driving bevel gear block 37, and two first screws 34 with reverse thread structures are symmetrically provided on the second rotating shaft 33, and two clamping assemblies with the same structure are provided in the upper and lower parts of the bag filter bin 2, and the two clamping assemblies respectively limit the top of the dust bag 10 at the top positioning cylinder 16 and the bottom of the dust bag 10 at the bottom positioning cylinder 24. The clamping assembly includes two arc-shaped clamping plates 31 symmetrically arranged on the dust bag 10, and the arc-shaped clamping plates 31 are symmetrically arranged on the dust bag 10. Two positioning blocks 32 are symmetrically provided at both ends of the first housing 27, the positioning blocks 32 are penetrated by the first screw 34 and are threadedly connected to the first screw 34, a first side box 28 is provided on one side of the first housing 27, a second side box 30 is provided on one side of the second housing 29, a second motor 44 is provided at the lower end of the second side box 30, an output end of the second motor 44 is provided with a first driving shaft 41 located inside the second side box 30, a first driving bevel gear block 42 is provided on the first driving shaft 41, and a docking rod 43 is provided at the upper end of the first driving shaft 41, a second driving shaft 39 is rotatably provided inside the first side box 28, a second driving bevel gear block 40 is provided at the top end of the second driving shaft 39, and the bottom end of the second driving shaft 39 is docked with the docking rod 43, a first driven bevel gear block 38 is provided at one end of the first rotating shaft 36, and the two first driven bevel gear blocks 38 are respectively located inside the first side box 28 and the second side box 30, and are respectively engaged with the second driving bevel gear block 40 and the first driving bevel gear block 42;

[0051] The top of the electrostatic treatment chamber 3 is provided with a top plate 15, and the top cover 11 is communicated with the electrostatic treatment chamber 3 through a transfer tube 14. A plurality of corona electrodes 51 are provided inside the electrostatic treatment chamber 3, and the symmetrical corona electrodes 51 are provided with two anode plates 50 installed on the inner wall of the electrostatic treatment chamber 3. Two fixed frames 52 are symmetrically provided inside the electrostatic treatment chamber 3, one end of the fixed frame 52 is provided with a fifth motor 53, and the output end of the fifth motor 53 is provided with a second cleaning shaft 54, and the second cleaning shaft 54 ​​is provided with a second cleaning brush that contacts the anode plate 50, and one side of the fixed frame 52 is provided with a There is a guide block, a plurality of limit blocks are provided on the top of the electrostatic treatment chamber 3, and a guide rod 58 is provided at the lower end of the limit block, which penetrates the guide block. The guide block and the guide rod 58 are slidably matched. A fourth motor 56 is provided on the outer wall of the treatment box 1 and is located on one side of the electrostatic treatment chamber 3. The output end of the fourth motor 56 is provided with a motor shaft inserted into the interior of the electrostatic treatment chamber 3, and one end of the motor shaft is provided with a driving rod 57. Two slide grooves 62 are symmetrically provided on the driving rod 57. A cylindrical block 55 is provided on one side of the fixing frame 52, which is inserted into the interior of the slide groove 62 and slidably matched with the slide groove 62;

[0052] A drawer slot 65 is provided at the bottom of the electrostatic treatment chamber 3 , and a carrier rack 66 is provided inside the drawer slot 65 , and a filter plate is provided at the bottom of the carrier rack 66 .

[0053] A bracket 17 is fixedly set inside the top positioning cylinder 16, and the first cleaning shaft 18 passes through the bracket 17 and is rotatably connected to the bracket 17. A plurality of fixed shafts 19 are rotatably set on the bracket 17, and a fan blade 22 is provided at the bottom of the fixed shaft 19. A driven gear 21 is provided at the top of the fixed shaft 19, and a driving gear 20 meshing with the driven gear 21 is provided at the top of the first cleaning shaft 18.

[0054] A guide rail 49 and a third motor 45 are provided on one side of the processing box 1. The second box body 29 is slidably matched with the guide rail 49. A fixing seat 48 is provided in the middle part of the second box body 29. The output end of the third motor 45 is provided with a second screw 47 that passes through the fixing seat 48. The second screw 47 is threadedly connected to the fixing seat 48, and the top end of the second screw 47 is rotatably connected to the first box body 27. The second side box 30 is slidably matched with the processing box 1, and the second side box 30 is fixed to one side of the second box body 29 by a reinforcing rod. The second drive shaft 3 9 is provided with a positioning groove inside, the docking rod 43 is inserted into the inside of the positioning groove, and the docking rod 43 can be extended and retracted in the positioning groove, two empty grooves 67 are symmetrically provided on the inner wall of the bag filter bin 2, and the two second rotating shafts 33 at the bottom of the bag filter bin 2 can be lifted and slid in the empty groove 67, and the two arc-shaped clamping plates 31 at the bottom of the bag filter bin 2 are respectively provided with arc plates 68 on their outer sides, and the two ends of the arc plates 68 are connected to the two positioning blocks 32, and a plurality of locking rods 69 are provided on the arc plates 68, and the locking rods 69 are threadedly connected to the arc plates 68.

[0055] A positive pressure fan 59 and a bellows 61 fixed on the outer wall of the processing box 1 are provided above the fourth motor 56. Two air outlet plates 60 close to the anode plate 50 are symmetrically arranged on the top of the electrostatic treatment chamber 3. The lower end of the air outlet plate 60 is provided with a plurality of air outlet holes. The air outlet end of the positive pressure fan 59 is connected to the bellows 61 through a first air duct, and the two ends of the bellows 61 are provided with a second air duct inserted into the inside of the air outlet plate 60.

[0056] The multiple arc-shaped plates 68 have the same size and are all semicircular structures.

[0057] A method for treating waste gas from a waste gas treatment device for steel structure welding according to any one of claims 1 to 5, comprising the following steps:

[0058] Step 1: Start the negative pressure fan 7 to generate suction at the air inlet pipe 6. The exhaust gas from steel structure welding enters the bottom pipe 25 through the air inlet pipe 6 and then enters the dust collecting bag 10 through the bottom pipe 25.

[0059] Step 2: The dust bag 10 can filter the exhaust gas from steel structure welding, so that impurities in the exhaust gas adhere to the inner wall of the dust bag 10. The filtered exhaust gas enters the top cover 11 through the air vent 13, and then enters the electrostatic treatment chamber 3 through the transfer pipe 14;

[0060] Step 3: The filtered steel structure welding waste gas is charged by the corona electrode 51 in the electrostatic treatment chamber 3 and then adsorbed onto the anode plate 50;

[0061] Step 4: The treated waste gas passes through the filter plate and is discharged to the designated location through the exhaust pipe 9.

[0062] In the first step, the two ends of the dust collecting bag 10 are first respectively put on the outer walls of the top positioning cylinder 16 and the bottom positioning cylinder 24, and then the second motor 44 is started. At this time, the first driving shaft 41 will drive the second driving shaft 39 to rotate, and then the first driving bevel gear block 42 and the second driving bevel gear block 40 will rotate, further making the two first rotating shafts 36 rotate synchronously. During the rotation of the first rotating shaft 36, the cooperation of the third driving bevel gear block 37 and the second driven bevel gear block 35 will make the four second rotating shafts 33 in the bag filter bin 2 rotate synchronously. At this time, the two arc-shaped clamping plates 31 at the top of the bag filter bin 2 will move toward each other, and the two arc-shaped clamping plates 31 at the bottom of the bag filter bin 2 will move toward each other, thereby fixing the top of the dust collecting bag 10 on the top positioning cylinder 16, and fixing the bottom of the dust collecting bag 10 on the bottom positioning cylinder 24.

[0063] When the top of the dust bag 10 is fixed, the bottom of the dust bag 10 is pulled so that the bottom of the dust bag 10 is between the arc plate 68 and the arc clamping plate 31. At this time, the locking rod 69 is rotated so that one end of the locking rod 69 contacts the dust bag 10. Then, the third motor 45 is started, which will cause the second box body 29 to move downward along the guide rail 49 so that the second side box 30 and the second box body 29 move downward synchronously. At this time, the docking rod 43 will extend in the positioning groove, so that the docking rod 43 and the second drive shaft 39 are stably docked, and further the second rotating shaft 33 at the bottom of the bag filter bin 2 slides downward in the empty groove 67, providing a stretching effect on the dust bag 10, so that the dust bag 10 is installed more tightly in the bag filter bin 2.

[0064] The first motor 64 is started to rotate the first cleaning shaft 18. At this time, the driving gear 20 and the driven gear 21 cooperate to make the fixed shaft 19 drive the fan blade 22 to rotate. The first cleaning brush 23 can clean the inner wall of the dust bag 10. The fan blade 22 generates wind force, so that the cleaned impurities are collected in the collecting barrel 26.

[0065] Start the fourth motor 56 to make the driving rod 57 rotate back and forth, and the rotation angle is less than 90 degrees. At this time, the cylindrical block 55 will slide back and forth in the slide groove 62. At this time, the fixed frame 52 will rise and fall back and forth along the guide rod 58. At this time, start the fifth motor 53 to make the second cleaning shaft 54 ​​rotate, so that the second cleaning brush cleans the impurities on the outer wall of the anode plate 50. At this time, start the positive pressure fan 59 to make multiple air outlets blow air downward so that the cleaned impurities fall onto the filter plate on the supporting frame 66.

[0066] Principle of bag filtration: suction is generated in the air inlet pipe 6 through the negative pressure fan 7, and the exhaust gas from steel structure welding is sucked into the bottom pipe 25 and enters the dust collecting bag 10. The dust collecting bag 10 uses its filtering characteristics to intercept impurities in the exhaust gas on the inner wall. The purified gas enters the top cover 11 through the air vents 13 on the top seat 12, ready to enter the next processing link. The first motor 64 drives the first cleaning shaft 18 and the first cleaning brush 23 to rotate, which can clean the inner wall of the dust collecting bag 10, and the cleaned impurities fall into the collecting barrel 26. During the cleaning process, the first cleaning shaft 18 drives the driven gear 21 through the driving gear 20 to rotate the fan blades 22 on the fixed shaft 19, generating wind force to assist in impurity collection.

[0067] Principle of electrostatic treatment: The exhaust gas filtered by the bag enters the electrostatic treatment chamber 3 through the transfer tube 14. The corona electrode 51 in the chamber charges the exhaust gas, so that the impurities in the exhaust gas are adsorbed on the anode plate 50, further removing the fine pollutants in the exhaust gas. The fourth motor 56 drives the driving rod 57 to rotate, so that the fixed frame 52 moves back and forth along the guide rod 58. At the same time, the fifth motor 53 drives the second cleaning shaft 54 ​​and the second cleaning brush to clean the anode plate 50. The positive pressure fan 59 blows air downward through the bellows 61 and the air outlet plate 60 to blow the cleaned impurities onto the filter plate of the carrier frame 66.

[0068] 1) Install the dust bag 10: Place the two ends of the dust bag 10 on the outer walls of the top positioning cylinder 16 and the bottom positioning cylinder 24 respectively, start the second motor 44, and the first drive shaft 41 drives the second drive shaft 39 to rotate, so that the first rotating shaft 36 rotates. Through the cooperation of the third driving bevel gear block 37 and the second driven bevel gear block 35, the four second rotating shafts 33 rotate synchronously, so that the arc-shaped clamping plates 31 at the top and bottom of the bag filter bin 2 move toward each other, fixing the dust bag 10.

[0069] 2) Stretch the dust bag 10: After the top of the dust bag 10 is fixed, pull the bottom so that it is located between the arc plate 68 and the arc clamping plate 31, rotate the locking rod 69 to contact the dust bag 10, and there is no mandatory requirement for the number of locking rods 69. Start the third motor 45 to move the second box body 29 downward along the guide rail 49, which will cause the second side box 30 to move synchronously. After the docking rod 43 is extended, it will be stably docked with the second drive shaft 39. Since the outer wall of the docking rod 43 has a rectangular block, the docking rod 43 can stably drive the second drive shaft 39 to rotate. At this time, the second rotating shaft 33 at the bottom of the bag filter bin 2 slides downward in the empty slot 67, which will stretch the dust bag 10.

[0070] 3) Waste gas treatment: Start the negative pressure fan 7, the waste gas enters the dust collecting bag 10 through the air inlet pipe 6 and the bottom pipe 25 for filtration, and the filtered waste gas enters the electrostatic treatment chamber 3 through the transfer pipe 14. After being treated by the corona electrode 51 and the anode plate 50, the waste gas passes through the filter plate and is discharged from the exhaust pipe 9.

[0071] 4) Cleaning and maintenance: Regularly start the first motor 64 to clean the dust bag 10, start the fourth motor 56 and the fifth motor 53 to clean the anode plate 50, and the positive pressure fan 59 assists in cleaning impurities. The cleaned impurities are collected on the filter plates of the collecting barrel 26 and the supporting rack 66 respectively. The collecting barrel 26 can be cleaned regularly and the supporting rack 66 can be pulled out to clean the filter plates.

[0072] The dust collecting bag 10 is combined with electrostatic treatment to effectively filter impurities such as metal oxides in the exhaust gas from steel structure welding, and can effectively purify the exhaust gas.

[0073] The first cleaning shaft 18 and the first cleaning brush 23 automatically clean the dust collecting bag 10, and the second cleaning shaft 54 ​​and the second cleaning brush automatically clean the anode plate 50, thereby reducing manual maintenance and improving filtering and purification efficiency.

[0074] The unique clamping assembly and stretching structure make it easy to install, fix and replace the dust collecting bag 10, and can ensure that the installation is tight, thereby improving the filtering effect.

[0075] The dust collecting bag 10 is annular and cylindrical, and its two ends can be respectively sleeved on the top positioning tube 16 and the bottom positioning tube 24.

[0076] The arc-shaped clamping plate 31 is arc-shaped, with positioning blocks 32 at both ends, which are used to fix the dust collecting bag 10 and fit tightly with the dust collecting bag 10.

[0077] Arc plate 68: semicircular structure, same size, cooperates with the arc clamping plate 31, assists in fixing the dust collecting bag 10 and can stretch it.

[0078] Corona electrode 51: arranged according to the internal structure of the electrostatic treatment chamber 3, used to charge the exhaust gas.

[0079] Anode plate 50: A symmetrical corona electrode 51 is provided in a flat plate shape and is used to absorb impurities in the charged exhaust gas.

[0080] The top seat 12 and the top plate 15 are fixed to the top of the processing box 1 by screws, and the top cover 11 is fixed to the upper end of the top seat 12 by screws, which can facilitate the assembly of the top cover 11 and the top seat 12. The side panels 63 are fixed to both sides of the bag filter bin 2 by screws, which can facilitate the maintenance of the parts inside the bag filter bin 2.

[0081] In the description herein, it should be noted that relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprise," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0082] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A waste gas treatment device for steel structure welding, comprising a treatment box (1), wherein a bag filter chamber (2) and an electrostatic treatment chamber (3) are provided in the treatment box (1), two side plates (63) are symmetrically arranged on both sides of the bag filter chamber (2), a plurality of support rods (4) are provided at the lower end of the treatment box (1), a bottom wheel (5) is provided at the bottom end of the support rod (4), an air inlet pipe (6) is provided at the bottom of the bag filter chamber (2), a negative pressure fan (7) is provided at the lower end of the treatment box (1), a conduit (8) connected to the electrostatic treatment chamber (3) is provided at the suction end of the negative pressure fan (7), and an exhaust pipe (9) is provided at the outlet end of the negative pressure fan (7), characterized in that: A dust collecting bag (10) is provided inside the bag filter bin (2), a partition is provided at the bottom of the bag filter bin (2), a bottom pipe (25) is vertically provided on the partition, a collecting barrel (26) is provided at the bottom of the bottom pipe (25), the collecting barrel (26) is threadedly connected to the bottom pipe (25), and the top end of the air inlet pipe (6) is connected to the bottom pipe (25), a top seat (12) is provided at the top of the bag filter bin (2), a top cover (11) is provided at the upper end of the top seat (12), and a plurality of air holes (13) are provided on the top seat (12) and located inside the top cover (11). The lower end of the top seat (12) is provided with a top positioning cylinder (16), the upper end of the bottom tube (25) is provided with a bottom positioning cylinder (24) located above the partition, the top and bottom of the dust bag (10) are respectively sleeved on the outer walls of the top positioning cylinder (16) and the bottom positioning cylinder (24), the upper end of the top seat (12) is provided with a first motor (64), the output end of the first motor (64) is provided with a first cleaning shaft (18) inserted into the interior of the dust bag (10), and the first cleaning shaft (18) is provided with a first cleaning brush (23) that contacts the inner wall of the dust bag (10); One side of the bag filter bin (2) is provided with a first box body (27) and a second box body (29) mounted on the outer wall of the processing box (1); the second box body (29) is located below the first box body (27); a first rotating shaft (36) is rotatably provided inside the first box body (27) and the second box body (29); two third driving bevel gear blocks (37) are provided on the first rotating shaft (36); two second rotating shafts (33) are rotatably provided at both ends of the first box body (27) and the second box body (29); one end of the second rotating shaft (33) is provided with a third driving bevel gear block (37); The movable bevel gear block (37) is meshed with a second driven bevel gear block (35), and two first screws (34) with reverse thread structures are symmetrically arranged on the second rotating shaft (33). Two clamping assemblies with the same structure are arranged in the upper and lower parts of the bag filter bin (2). The two clamping assemblies respectively limit the top of the dust collecting bag (10) at the top positioning cylinder (16) and the bottom of the dust collecting bag (10) at the bottom positioning cylinder (24). The clamping assembly includes two arc-shaped clamping plates (31) symmetrically arranged on the dust collecting bag (10), and the two ends of the arc-shaped clamping plates (31) are Two positioning blocks (32) are symmetrically arranged, and the positioning blocks (32) are penetrated by a first screw (34) and are threadedly connected to the first screw (34). A first side box (28) is provided on one side of the first box body (27), and a second side box (30) is provided on one side of the second box body (29). A second motor (44) is provided at the lower end of the second side box (30), and a first driving shaft (41) located inside the second side box (30) is provided at the output end of the second motor (44). A first driving bevel gear block (42) is provided on the first driving shaft (41) and the first driving shaft ( The upper end of the first rotating shaft (36) is provided with a docking rod (43), the interior of the first side box (28) is rotatably provided with a second driving shaft (39), the top end of the second driving shaft (39) is provided with a second driving bevel gear block (40), the bottom end of the second driving shaft (39) is docked with the docking rod (43), one end of the first rotating shaft (36) is provided with a first driven bevel gear block (38), the two first driven bevel gear blocks (38) are respectively located inside the first side box (28) and the second side box (30), and are respectively engaged with the second driving bevel gear block (40) and the first driving bevel gear block (42); The top of the electrostatic treatment chamber (3) is provided with a top plate (15), the top cover (11) is communicated with the electrostatic treatment chamber (3) through a transfer tube (14), a plurality of corona electrodes (51) are provided inside the electrostatic treatment chamber (3), and the symmetrical corona electrodes (51) are provided with two anode plates (50) installed on the inner wall of the electrostatic treatment chamber (3), two fixed frames (52) are symmetrically provided inside the electrostatic treatment chamber (3), one end of the fixed frame (52) is provided with a fifth motor (53), the output end of the fifth motor (53) is provided with a second cleaning shaft (54), the second cleaning shaft (54) is provided with a second cleaning brush that contacts the anode plate (50), the fixed frame (52) A guide block is provided on one side of the electrostatic treatment chamber (3), a plurality of limit blocks are provided on the top of the limit block, a guide rod (58) is provided at the lower end of the limit block which passes through the guide block, the guide block and the guide rod (58) are slidably matched, a fourth motor (56) is provided on the outer wall of the treatment box (1) and is located on one side of the electrostatic treatment chamber (3), an output end of the fourth motor (56) is provided with a motor shaft inserted into the interior of the electrostatic treatment chamber (3), a driving rod (57) is provided at one end of the motor shaft, two slide grooves (62) are symmetrically provided on the driving rod (57), and a cylindrical block (55) is provided on one side of the fixing frame (52) which is inserted into the interior of the slide groove (62) and slidably matched with the slide groove (62); The bottom of the electrostatic treatment chamber (3) is provided with a drawer slot (65), a carrier rack (66) is provided inside the drawer slot (65), and a filter plate is provided at the bottom of the carrier rack (66).

2. The exhaust gas treatment device for steel structure welding according to claim 1, characterized in that: A bracket (17) is fixedly arranged inside the top positioning cylinder (16); the first cleaning shaft (18) passes through the bracket (17) and is rotatably connected to the bracket (17); a plurality of fixed shafts (19) are rotatably arranged on the bracket (17); a fan blade (22) is provided at the bottom of the fixed shaft (19); a driven gear (21) is provided at the top of the fixed shaft (19); and a driving gear (20) meshing with the driven gear (21) is provided at the top end of the first cleaning shaft (18).

3. The exhaust gas treatment device for steel structure welding according to claim 2, characterized in that: A guide rail (49) and a third motor (45) are provided on one side of the processing box (1), the second box body (29) is slidably matched with the guide rail (49), a fixed seat (48) is provided in the middle part of the second box body (29), an output end of the third motor (45) is provided with a second screw rod (47) passing through the fixed seat (48), the second screw rod (47) is threadedly connected to the fixed seat (48), and the top end of the second screw rod (47) is rotatably connected to the first box body (27), the second side box (30) is slidably matched with the processing box (1), and the second side box (30) is fixed to one side of the second box body (29) through a reinforcing rod, and the second drive shaft ( A positioning groove is provided inside the bag filter bin (39), the docking rod (43) is inserted into the positioning groove, and the docking rod (43) can be extended and retracted in the positioning groove, two empty grooves (67) are symmetrically provided on the inner wall of the bag filter bin (2), and the two second rotating shafts (33) at the bottom of the bag filter bin (2) can be lifted and slid in the empty grooves (67), and arc plates (68) are respectively provided on the outer sides of the two arc-shaped clamping plates (31) at the bottom of the bag filter bin (2), and the two ends of the arc plates (68) are connected to the two positioning blocks (32), and a plurality of locking rods (69) are provided on the arc plates (68), and the locking rods (69) are threadedly connected to the arc plates (68).

4. The exhaust gas treatment device for steel structure welding according to claim 3, characterized in that: A positive pressure fan (59) and a bellows (61) fixed on the outer wall of the processing box (1) are provided above the fourth motor (56); two air outlet plates (60) close to the anode plate (50) are symmetrically provided on the top of the electrostatic processing chamber (3); a plurality of air outlet holes are provided at the lower end of the air outlet plate (60); the air outlet end of the positive pressure fan (59) is connected to the bellows (61) through a first air duct; and a second air duct inserted into the inside of the air outlet plate (60) is provided at both ends of the bellows (61).

5. The exhaust gas treatment device for steel structure welding according to claim 4, characterized in that: The multiple arc-shaped plates (68) have the same size and are all semicircular structures.

6. A method for treating waste gas from a waste gas treatment device for steel structure welding according to any one of claims 1 to 5, characterized in that: The following steps are involved: The first step is to start the negative pressure fan (7) to generate suction at the air inlet pipe (6), so that the steel structure welding waste gas enters the interior of the bottom pipe (25) through the air inlet pipe (6), and then enters the dust collecting bag (10) through the bottom pipe (25); Step 2: The dust bag (10) can filter the steel structure welding waste gas, so that the impurities in the waste gas adhere to the inner wall of the dust bag (10). The filtered waste gas enters the top cover (11) through the air vent (13) and then enters the electrostatic treatment chamber (3) through the transfer tube (14); Step 3: The filtered steel structure welding waste gas is charged by the corona electrode (51) in the electrostatic treatment chamber (3) and then adsorbed onto the anode plate (50); Step 4: The treated waste gas passes through the filter plate and is discharged to a designated location through the exhaust pipe (9).

7. The method for treating waste gas from a waste gas treatment device for steel structure welding according to claim 6, characterized in that: In the first step, the two ends of the dust collecting bag (10) are respectively placed on the outer walls of the top positioning cylinder (16) and the bottom positioning cylinder (24), and then the second motor (44) is started. At this time, the first driving shaft (41) drives the second driving shaft (39) to rotate, which in turn causes the first driving bevel gear block (42) and the second driving bevel gear block (40) to rotate, further causing the two first rotating shafts (36) to rotate synchronously. During the rotation of the first rotating shaft (36), the third driving bevel gear block (42) drives the second driving bevel gear block (40). The tooth block (37) cooperates with the second driven bevel tooth block (35) to cause the four second rotating shafts (33) in the bag filter chamber (2) to rotate synchronously, thereby causing the two arc-shaped clamping plates (31) at the top of the bag filter chamber (2) to move toward each other, and the two arc-shaped clamping plates (31) at the bottom of the bag filter chamber (2) to move toward each other, thereby fixing the top of the dust collecting bag (10) on the top positioning cylinder (16) and fixing the bottom of the dust collecting bag (10) on the bottom positioning cylinder (24).

8. The method for treating waste gas from a waste gas treatment device for steel structure welding according to claim 7, characterized in that: After the top of the dust collecting bag (10) is fixed, the bottom of the dust collecting bag (10) is pulled so that the bottom of the dust collecting bag (10) is between the arc plate (68) and the arc clamping plate (31). At this time, the locking rod (69) is rotated so that one end of the locking rod (69) contacts the dust collecting bag (10). Then, the third motor (45) is started, which causes the second box body (29) to move downward along the guide rail (49) so that the second side box (30) and the second box body (29) move downward synchronously. At this time, the docking rod (43) will extend in the positioning groove so that the docking rod (43) and the second drive shaft (39) are stably docked, further causing the second rotating shaft (33) at the bottom of the bag filter bin (2) to slide downward in the empty groove (67), providing a stretching effect to the dust collecting bag (10), so that the dust collecting bag (10) is installed more tightly in the bag filter bin (2).

9. The method for treating waste gas from a waste gas treatment device for steel structure welding according to claim 8, characterized in that: The first motor (64) is started to rotate the first cleaning shaft (18). At this time, the driving gear (20) and the driven gear (21) cooperate to make the fixed shaft (19) drive the fan blade (22) to rotate. The first cleaning brush (23) can clean the inner wall of the dust bag (10). The fan blade (22) generates wind force, so that the cleaned impurities are collected in the collecting barrel (26); The fourth motor (56) is started to rotate the driving rod (57) back and forth, and the rotation angle is less than 90 degrees. At this time, the cylindrical block (55) will slide back and forth in the chute (62). At this time, the fixed frame (52) will rise and fall along the guide rod (58). At this time, the fifth motor (53) is started to rotate the second cleaning shaft (54), so that the second cleaning brush cleans the impurities on the outer wall of the anode plate (50). At this time, the positive pressure fan (59) is started to blow air downward at the multiple air outlets, so that the cleaned impurities fall onto the filter plate on the carrier (66).

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