Roller inner diameter hole repair welding device

Abstract

The present application relates to the technical field of roller repair, and discloses a roller inner diameter hole repair welding device, which comprises a base, a rotatable clamp arranged on the top of the base, and a driving motor fixedly arranged on the top of the base and used for driving the clamp to rotate; a repair structure arranged on one side of the clamp and used for machining a workpiece, the repair structure comprising a seat head, a cutter, a welding gun and a rotary seat, the cutter and the welding gun being detachably arranged on the opposite ends of the seat head, the rotary seat being fixedly connected with the seat head and movably arranged on the top of the base through an adjusting member, the rotary seat being capable of rotating circumferentially to adjust the position of the seat head so that one end of the seat head faces the clamp, the repair structure being provided with the cutter and the welding gun on the opposite ends of the seat head, and the two machining modes can be switched quickly through the rotation of the rotary seat, and the workpiece does not need to be detached from the clamp. After surfacing welding is completed, the cutter is switched to perform cutting machining directly on the original position, the coaxiality of the repaired inner hole and the outer circle reference of the roller is ensured, and the repair precision is improved.

Description

Technical Field

[0001] This invention belongs to the field of roller repair technology, specifically, it relates to a device for welding and repairing the inner diameter hole of a roller. Background Technology

[0002] In industries such as metallurgy, mining, and building materials, rollers are core components of various conveying and rolling equipment, operating under harsh conditions of high load and high friction for extended periods. Over time, the inner diameter bore of the rollers develops varying degrees of wear, scoring, and corrosion, leading to increased clearance between the roller and bearings or shafts, rendering them unusable and necessitating repair.

[0003] A prior art disclosure reveals a roller repair welding device (publication number: CN213053555U), comprising a support frame, side slide frames slidably connected to both sides of the outer surface of the support frame, a fastening ring welded and fixed to the outer surface of the side slide frames, a locking bolt threaded to the end face of the fastening ring, a fastening plate welded and fixed to the inner surface of the fastening ring, a main slide frame slidably connected to the middle of the outer surface of the support frame, an outer cylinder welded and fixed to the outer surface of the main slide frame, a motor welded and fixed to the upper outer surface of the outer cylinder, an inner rotating cylinder rotatably connected to the inner surface of the outer cylinder, a welding machine welded and fixed to the outer surface of the inner rotating cylinder and located to the left of the outer cylinder, and a welding repair device disposed inside the inner rotating cylinder.

[0004] Currently, the main technical challenges in welding repair of the inner diameter holes of rollers are as follows:

[0005] Firstly, the inner diameter hole is a confined space, making welding operations extremely difficult. For hollow rollers with a large length-to-diameter ratio (e.g., length 2–4 m, inner diameter 100–300 mm), operators cannot enter the hole for manual welding, and conventional welding torches are also difficult to extend into the hole for stable welding. Welding the inner wall requires precise positioning and stable movement of the welding torch within a narrow space, which places high demands on the motion control of the equipment and the structure of the welding torch.

[0006] Secondly, the finishing process after welding is difficult. The surface roughness of the weld overlay is high and it has a spiral wavy shape, requiring machining to restore it to the designed dimensions and surface accuracy. In existing technologies, welding repair and machining are usually performed on different equipment, requiring secondary clamping. Secondary clamping not only prolongs the repair cycle but also easily leads to coaxiality deviation between the inner hole and the outer circle after repair due to changes in the clamping datum, affecting the performance of the roller.

[0007] In existing technology, this equipment is mainly designed for welding repairs on the outer surface of rollers. It is not well-suited for welding repairs on inner diameter holes, and after welding, the equipment still needs to be transferred to other equipment for machining, resulting in a loose process connection. In addition, the device lacks a structure for collecting and treating welding fumes, and the fumes generated during the welding process not only pollute the environment but also affect the health of operators.

[0008] In view of this, the present invention is proposed. Summary of the Invention

[0009] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0010] A device for welding and repairing the inner diameter hole of a roller, comprising:

[0011] The base has a rotatable clamp on its top, and a drive motor is fixedly installed on the top of the base to drive the clamp to rotate.

[0012] A repair structure is set on one side of the fixture for processing the workpiece. The repair structure includes a head, a cutting tool, a welding torch, and a rotary seat. The cutting tool and the welding torch are respectively detached and installed at opposite ends of the head. The rotary seat is fixedly connected to the head. The rotary seat is movably installed on the top of the base through an adjusting component. The rotary seat can rotate circumferentially to adjust the position of the head so that one end faces the fixture.

[0013] The exhaust gas treatment structure is installed on the base to adsorb the flue gas generated during processing.

[0014] In a preferred embodiment of the present invention, the adjusting component includes a slide and guide rails. Two guide rails are fixedly installed on the top of the base. The slide is slidably connected to the guide rails, and the rotary seat is axled on the top of the slide.

[0015] In a preferred embodiment of the present invention, the guide rail is fixed to the top surface of the base by bolts, the two guide rails are distributed in parallel, and the bottom of the slide table is provided with a slider that matches the guide rail. The slider is locked to the slide table by screws and the slider is slidably connected to the guide rail.

[0016] In a preferred embodiment of the present invention, a rotating shaft is fixedly installed at the bottom of the rotary seat, and a bearing is installed on the slide table, with the rotating shaft and the bearing shaft connected together.

[0017] In a preferred embodiment of the present invention, the adjusting component further includes a positioning hole and a limiting screw. The rotary seat has two symmetrically opened positioning holes, and the top of the slide table has a threaded hole. The limiting screw passes through the positioning hole and is threadedly connected to the threaded hole to restrict the rotation of the rotary seat.

[0018] In a preferred embodiment of the present invention, the exhaust gas treatment structure includes an adsorption box and a dust collection pipe. The adsorption box is hollow and forms a treatment chamber. The dust collection pipe is connected to the adsorption box chamber and a fan is fixedly installed on the dust collection pipe to discharge air into the adsorption box chamber.

[0019] In a preferred embodiment of the present invention, the exhaust gas treatment structure further includes an exhaust pipe and a partition. An exhaust pipe for exhausting is fixedly installed on the side wall of the adsorption box. The partition is fixedly connected to the adsorption box and divides the treatment chamber of the adsorption box into a dry treatment chamber and a wet treatment chamber. The exhaust pipe and the dust suction pipe are located on both sides of the partition.

[0020] In a preferred embodiment of the present invention, the exhaust gas treatment structure further includes a liquid pipe and a drain pipe, both of which are fixedly installed with the adsorption box. Valves are fixedly installed on both the liquid pipe and the drain pipe, and the liquid pipe and the drain pipe are located on the same side of the partition.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The welding and cutting functions are integrated into one unit, avoiding secondary clamping and significantly improving the repair accuracy.

[0023] This invention mounts the cutting tool and welding torch at opposite ends of the headstock, allowing for rapid switching between two processing methods by rotating the rotary head. After welding is completed, the roller does not need to be removed from the fixture; the headstock can be rotated directly in place to switch to the cutting tool for machining. This "one-time clamping, two-process completion" design fundamentally avoids the positioning reference changes caused by transferring the roller to a lathe for re-clamping after welding repair in traditional processes, ensuring the coaxiality of the inner hole and the outer circle reference of the roller after repair. Simultaneously, it reduces the number of times the roller is lifted and clamped, lowering the risk of surface damage caused by multiple clamping operations and significantly improving repair quality.

[0024] 2. The rotary seat provides precise bidirectional positioning, reliable switching, and convenient operation.

[0025] The rotary table has two symmetrical positioning holes, corresponding to the welding torch working position and the cutting tool working position, respectively. When it is necessary to switch tools, simply loosen the limit screw, rotate the table head to another position, insert the limit screw into the corresponding positioning hole, and tighten it. The limit screw engages with the threaded hole on the top of the slide table to reliably lock the rotary table, effectively preventing the table head from deflecting due to vibration during welding or cutting. This positioning method has a simple structure, high positioning accuracy, and convenient operation. It can achieve precise position switching without the need for measuring tools or visual assistance, which is conducive to rapid on-site operation.

[0026] 3. Manual axial feed and roller rotation work together to ensure uniform and controllable weld overlay thickness.

[0027] This invention employs a sliding engagement between a slide table and a guide rail, allowing the operator to manually push the repair structure along the roller's axial direction. The operator can flexibly adjust the feed speed according to the actual condition of the worn area: for severely worn areas, the feed speed can be slowed down to increase the weld overlay thickness; for lightly worn areas, the feed speed can be increased. Simultaneously, the drive motor rotates the roller at a uniform speed. Under the combined motion of rotation and axial feed, the welding torch forms a continuous spiral weld overlay on the inner wall of the bore, resulting in a uniform weld overlay thickness without overlapping defects. Compared to fully automatic CNC feeding, manual feeding significantly reduces equipment costs while retaining the flexibility of process adjustments, making it particularly suitable for single-piece, small-batch roller repair operations.

[0028] 4. The dry and wet two-stage exhaust gas purification system has a significant environmental protection effect and improves the working environment.

[0029] The fumes generated during welding contain metal oxide dust (such as iron oxides, chromium, nickel, etc.) and harmful gases (such as CO, NOx, ozone, etc.). Direct emission of these fumes would severely pollute the environment and endanger the health of operators. This invention employs a two-stage wet and dry exhaust gas treatment structure: the dust-laden gas is first passed into an adsorption liquid in the wet treatment chamber, where large dust particles are captured and settled, while some harmful gases (such as CO and nitrogen oxides) are absorbed and neutralized by the alkaline solution. After rising, the fumes pass through a partition into the dry treatment chamber, where porous adsorption media such as activated carbon perform secondary physical adsorption on residual fine dust and organic harmful gases. After these two stages of purification, the dust concentration in the exhaust gas can be reduced to below national emission standards, effectively protecting the occupational health of operators and the surrounding environment.

[0030] 5. The exhaust gas treatment structure is easy to maintain and has low operating costs.

[0031] The wet treatment chamber is equipped with a liquid pipe and a drain pipe. Operators can periodically replenish or replace the adsorbent through the liquid pipe and discharge the dust-laden waste liquid through the drain pipe. The activated carbon adsorbent in the dry treatment chamber can be periodically removed for regeneration or replacement. The adsorbent is inexpensive, and both the liquid and drain pipes are equipped with valves for convenient and quick operation. The entire exhaust gas treatment system requires no complex control devices and operates solely on fan power, resulting in low energy consumption and low maintenance costs, making it suitable for continuous operation repair workshops.

[0032] 6. The equipment has a high degree of integration, occupies a small area, and is suitable for repairing rollers of various specifications.

[0033] This invention integrates workpiece clamping, welding, cutting, and exhaust gas treatment modules onto a single base, resulting in a compact overall structure. The guide rail length can be customized to suit common roller lengths, and the sliding table can cover the entire length of the roller, making it suitable for repairing hollow rollers of varying lengths. The three-jaw / four-jaw self-centering chuck of the fixture is equipped with copper washers, providing a wide range of clamping diameters, uniform clamping force without damaging the roller's outer surface. A single machine can complete both the welding and finishing processes, eliminating the need for a separate welding positioner and lathe, significantly reducing equipment investment costs. It is particularly suitable for small and medium-sized roller repair companies.

[0034] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0035] In the attached diagram:

[0036] Figure 1 This is one of the overall perspective views of the present invention;

[0037] Figure 2 This is the second overall perspective view of the present invention;

[0038] Figure 3 This is a perspective view of the repair structure and adjustment components of the present invention;

[0039] Figure 4 This is a schematic diagram illustrating the adjustment position of the repair structure in this invention;

[0040] Figure 5 This is a three-dimensional view of the exhaust gas treatment structure of the present invention;

[0041] Figure 6 This is a 3D view of the internal structure of the adsorption box.

[0042] In the diagram: 10. Base; 11. Fixture; 12. Drive motor; 20. Head; 21. Tool; 22. Welding torch; 23. Rotary seat; 24. Slide table; 25. Guide rail; 26. Positioning hole; 27. Limiting screw; 30. Adsorption box; 31. Dust suction pipe; 32. Exhaust pipe; 33. Partition; 34. Liquid pipe; 35. Sewage pipe. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0044] like Figures 1 to 6 As shown, the present invention provides a roller inner diameter hole repair welding device, including a base 10, a clamp 11, a drive motor 12, a repair structure, an adjustment component and an exhaust gas treatment structure.

[0045] Base 10 and clamp 11

[0046] The base 10 is a rectangular welded steel plate structure made of Q235B material with a thickness of 12-16mm. The bottom of the base 10 is equipped with four adjustable anchor bolts to adjust the level of the base 10 and ensure that the axis of the roller after clamping is parallel to the guide rail 25.

[0047] The clamp 11 is fixedly mounted on one end of the base 10 via a bracket. The clamp 11 is a three- or four-jaw self-centering chuck used to hold one end of the roller to be repaired. Copper gaskets (2-3 mm thick) are embedded on the inner side of the jaws of the clamp 11 to protect the outer surface of the roller from being damaged. The clamping diameter of the clamp 11 ranges from 80 to 300 mm, and it can be adapted to hollow rollers of different specifications.

[0048] The drive motor 12 is a variable frequency speed control motor, fixedly mounted on the top of the base 10, and connected to the rotating shaft of the clamp 11 via pulleys and a belt. The drive motor 12 is electrically connected to the frequency converter, and its speed can be adjusted according to the welding process requirements (usually 2 to 20 rpm). When the drive motor 12 starts, it drives the clamp 11 and the rollers it holds to rotate uniformly around its axis.

[0049] Repairing the structure

[0050] The repair structure is located on one side of the fixture 11 and is used for welding and machining the inner diameter hole of the roller. The repair structure includes a head 20, a cutting tool 21, a welding gun 22, and a rotary seat 23.

[0051] The headstock 20 is a long strip of metal plate with mounting interfaces at both ends for mounting the cutting tool 21 and the welding torch 22. The cutting tool 21 and the welding torch 22 are detachably mounted on opposite ends of the headstock 20 by bolts.

[0052] Tool 21 is a boring tool or scraper used to cut the weld overlay to restore the design dimensions and surface accuracy of the inner diameter hole. The cutting tip of tool 21 is made of cemented carbide, and the cutting edge protrusion can be adjusted according to the cutting allowance (usually 0.5 to 2 mm).

[0053] The welding torch 22 is a CO2 gas shielded welding torch or an argon arc welding torch. Its length is determined according to the depth of the inner diameter hole of the roller. The front end of the torch tube is equipped with a conductive nozzle and a wire feed port. The welding torch 22 is connected to the welding power source and the wire feeding mechanism (not shown in the figure).

[0054] The rotary seat 23 is a cylindrical or square block, with its top fixedly connected to the seat head 20 and a rotating shaft at the bottom. The rotary seat 23 is movably mounted on the top of the base 10 via an adjusting component, and can rotate 90° around its axis to adjust the position of the seat head 20 so that one end of the tool 21 or welding torch 22 is directly opposite the roller held by the clamp 11.

[0055] Adjustment components

[0056] The adjusting components are used to realize the axial movement of the repair structure and the position locking of the rotary seat 23, including the slide table 24, the guide rail 25, the positioning hole 26 and the limiting screw 27.

[0057] The guide rail 25 consists of two parallel linear guide rails, which are fixedly mounted on the top surface of the base 10 by bolts and extend along the roller axis. The length of the guide rail 25 should cover the entire length of the roller, typically 2 to 4 meters.

[0058] The slide table 24 is a metal plate with a slider adapted to the guide rail 25 mounted on its bottom. The slider is locked to the slide table 24 by screws and can slide axially on the guide rail 25. The operator can manually push the slide table 24 to move the repair structure along the guide rail 25, thereby realizing the feeding movement of the welding torch 22 or the tool 21 along the roller axis.

[0059] The rotary seat 23 is rotatably connected to the slide table 24 via a rotating shaft. Bearings are mounted on the slide table 24, and the rotating shaft is axially connected to the bearings, allowing the rotary seat 23 to rotate around a vertical axis. The rotary seat 23 has two symmetrically arranged positioning holes 26, with an included angle of 90°, corresponding to the working positions of the welding torch 22 and the cutting tool 21, respectively. A threaded hole is provided on the top of the slide table 24, through which a limiting screw 27 passes and is threadedly connected to the positioning hole 26, locking the rotary seat 23 in the predetermined working position.

[0060] Exhaust gas treatment structure

[0061] The exhaust gas treatment structure is used to collect and purify the welding fumes generated during the welding process, including an adsorption box 30, a dust suction pipe 31, an exhaust pipe 32, a baffle 33, a liquid pipe 34, and a sewage discharge pipe 35.

[0062] The adsorption box 30 is a sealed box, fixedly installed on the base 10, with a hollow interior forming a processing chamber. The suction pipe 31 is a high-temperature resistant flexible hose, one end of which is connected to a dust collection hood (not shown in the figure), which is arranged near the welding torch 22 to collect welding fumes; the other end of the suction pipe 31 is connected to the air inlet of the adsorption box 30. A fan (not shown in the figure) is fixedly installed on the suction pipe 31 to draw dust-laden gas into the adsorption box 30.

[0063] A partition 33 is vertically welded and fixed inside the adsorption box 30, dividing the treatment chamber into a dry treatment chamber and a wet treatment chamber. The wet treatment chamber is located on the side of the air inlet pipe and is filled with an adsorption liquid (such as water or chemical absorption liquid), with the liquid level controlled by the liquid pipe 34. The dust suction pipe 31 is connected to the wet treatment chamber. The dust-laden gas is first passed into the liquid for washing to remove large dust particles and some soluble harmful gases. After washing, the flue gas rises, passes over the partition 33, and enters the dry treatment chamber.

[0064] The dry treatment chamber is filled with an adsorption carrier (such as activated carbon particles, molecular sieves, or porous ceramics) for secondary physical adsorption filtration of flue gas, further removing residual fine dust and harmful substances. The exhaust pipe 32 is fixedly installed on the side wall of the adsorption box 30 and communicates with the dry treatment chamber. The treated clean gas is discharged from the exhaust pipe 32.

[0065] Both the liquid pipe 34 and the drain pipe 35 are fixedly installed on the side wall of the adsorption tank 30, located on one side of the wet treatment chamber. The liquid pipe 34 is used to replenish the adsorption liquid into the wet treatment chamber, and the drain pipe 35 is used to periodically discharge waste liquid containing dust and pollutants. Both are equipped with valves for easy operation.

[0066] Working principle

[0067] The working principle of the roller inner diameter hole repair and welding device of the present invention is based on three core designs: integrated welding repair and cutting processing, dual function of rotary switching and staged exhaust gas purification. The specific working process is as follows.

[0068] Clamping and centering

[0069] The hollow roller to be repaired is hoisted to the front of the equipment. One end of the roller is clamped and fixed by the three-jaw self-centering chuck of the clamp 11, ensuring that the axis of the roller is parallel to the guide rail 25. The drive motor 12 drives the clamp 11 and the roller to rotate at low speed around its axis via belt drive to check whether the rotation is smooth.

[0070] Welding torch position adjustment and locking

[0071] Loosen the limiting screw 27 and rotate the rotary seat 23 90° so that the welding torch 22 mounted on one end of the seat head 20 is facing the end of the roller. Insert the limiting screw 27 into the corresponding positioning hole 26 and lock it with the threaded hole on the slide table 24 to lock the rotary seat 23 in the welding working position. Manually push the slide table 24 to move it along the guide rail 25, insert the front end of the welding torch 22 into the inner diameter hole of the roller, and adjust it to the starting position for welding.

[0072] Internal diameter hole overlay welding

[0073] Start the drive motor 12, and the roller rotates at a set speed (usually 2-10 rpm) at a constant speed. Start the welding power supply and wire feeding mechanism, and the welding torch 22 begins welding. The operator pushes the slide table 24 at a constant speed, causing the welding torch 22 to feed along the roller axis. Under the combined motion of roller rotation and axial feeding, the welding torch 22 forms a spiral weld overlay layer on the inner wall of the inner diameter hole. For areas with uneven wear, the weld overlay layer thickness can be adjusted by adjusting the feed speed of the slide table 24.

[0074] Tool position switching and cutting process

[0075] After the welding is completed, turn off the welding power and remove the welding torch 22 from the inner hole of the roller. Loosen the limiting screw 27, rotate the rotary seat 23 90° in the opposite direction so that the cutter 21 installed at the other end of the seat head 20 is facing the end of the roller, reinsert the limiting screw 27 and tighten it. Insert the cutter 21 into the inner hole of the roller, start the drive motor 12, and the operator pushes the slide table 24 to drive the cutter 21 to feed axially, cutting the weld overlay layer to restore the design size and surface accuracy of the inner diameter hole (usually the surface roughness can reach below Ra3.2μm).

[0076] Exhaust gas treatment

[0077] During the welding process, welding fumes are drawn into the wet treatment chamber of the adsorption box 30 by the suction pipe 31 under the negative pressure generated by the fan. First, they are introduced into the adsorption liquid, where large dust particles are captured and some harmful gases (such as CO and NOx) are absorbed. After rising, the fumes pass through the partition 33 and enter the dry treatment chamber, where they are adsorbed and filtered by porous media such as activated carbon. The clean gas is then discharged from the exhaust pipe 32. The adsorption liquid in the wet treatment chamber is replenished periodically through the liquid pipe 34, and the waste liquid is discharged through the drain pipe 35.

[0078] Repair complete

[0079] After the cutting process is completed, turn off the drive motor 12, release the clamp 11, remove the repaired roller, and you can proceed to the next process.

[0080] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A device for repairing and welding inner diameter holes of rollers, characterized in that, include: The base (10) has a rotatable clamp (11) on its top and a drive motor (12) fixedly installed on its top for driving the clamp (11) to rotate. The repair structure is set on one side of the fixture (11) for processing the workpiece. The repair structure includes a head (20), a tool (21), a welding torch (22) and a rotary seat (23). The tool (21) and the welding torch (22) are respectively disassembled and installed at opposite ends of the head (20). The rotary seat (23) is fixedly connected to the head (20). The rotary seat (23) is movably installed on the top of the base (10) through an adjusting component. The rotary seat (23) can rotate to adjust the position of the head (20) so that one end faces the fixture (11). The exhaust gas treatment structure is set on the base (10) to adsorb the flue gas generated during processing.

2. The roller inner diameter hole repair and welding device according to claim 1, characterized in that, The adjustment component includes a slide (24) and a guide rail (25). Two guide rails (25) are fixedly installed on the top of the base (10). The slide (24) is slidably connected to the guide rails (25). The rotary seat (23) is axially connected to the top of the slide (24).

3. The roller inner diameter hole repair and welding device according to claim 2, characterized in that, The guide rail (25) is fixed to the top surface of the base (10) by bolts. The two guide rails (25) are distributed in parallel. The bottom of the slide table (24) is provided with a slider that is compatible with the guide rail (25). The slider is locked to the slide table (24) by screws and the slider is slidably connected to the guide rail (25).

4. The roller inner diameter hole repair and welding device according to claim 2, characterized in that, The bottom of the rotary seat (23) is fixedly installed with a rotating shaft, and the slide (24) is equipped with a bearing, with the rotating shaft and the bearing shaft connected.

5. The roller inner diameter hole repair and welding device according to claim 1, characterized in that, The adjusting component also includes a positioning hole (26) and a limiting screw (27). The rotary seat (23) has two symmetrically opened positioning holes (26). The top of the slide (24) has a threaded hole. The limiting screw (27) passes through the positioning hole (26) and is threadedly connected to the threaded hole to restrict the rotation of the rotary seat (23).

6. The roller inner diameter hole repair device according to claim 1, characterized in that, The exhaust gas treatment structure includes an adsorption box (30) and a suction pipe (31). The adsorption box (30) is hollow inside and forms a treatment chamber. The suction pipe (31) is connected to the chamber of the adsorption box (30). A fan is fixedly installed on the suction pipe (31) to discharge air into the chamber of the adsorption box (30).

7. The roller inner diameter hole repair device according to claim 6, characterized in that, The exhaust gas treatment structure also includes an exhaust pipe (32) and a partition (33). An exhaust pipe (32) for exhausting is fixedly installed on the side wall of the adsorption box (30). The partition (33) is fixedly connected to the adsorption box (30). The partition (33) divides the treatment chamber of the adsorption box (30) into a dry treatment chamber and a wet treatment chamber. The exhaust pipe (32) and the dust suction pipe (31) are located on both sides of the partition (33).

8. The roller inner diameter hole repair and welding device according to claim 7, characterized in that, The exhaust gas treatment structure also includes a liquid pipe (34) and a sewage pipe (35). The liquid pipe (34) and the sewage pipe (35) are both fixedly installed with the adsorption box (30). Valves are fixedly installed on both the liquid pipe (34) and the sewage pipe (35). The liquid pipe (34) and the sewage pipe (35) are located on the same side of the partition (33).

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