Multifunctional welding device for expansion project construction of thermal power generating unit

Abstract

The invention discloses a multifunctional welding device for expansion project construction of a thermal power generating unit, and belongs to the technical field of welding devices. Comprising a bottom plate, clamping mechanisms are symmetrically and fixedly connected to the upper surface of the bottom plate, a welding mechanism is arranged between the two clamping mechanisms, and a filtering mechanism is arranged above the welding mechanism; stable fixing of the pipeline is achieved through the clamping mechanism, a first electric telescopic rod pushes a movable plate, a first connecting plate drives an arc-shaped clamping plate to clamp the pipeline, the adaptive design of an arc-shaped groove and the arc-shaped clamping plate enables the pipelines with different pipe diameters to be accurately positioned, and the pipelines are kept still all the time in the welding process; and meanwhile, the welding mechanism drives a first gear to be meshed with a first gear block through a driving motor, so that a movable ring drives a welding head to do circular motion around the pipeline, the distance between the welding head is accurately adjusted through cooperation with a second electric telescopic rod, it is ensured that weld joints are formed uniformly and consistently, and the strength and sealing performance of the welding head are fundamentally improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding device, especially to a multifunctional welding device for thermal power unit expansion project construction. BACKGROUND

[0002] In the field of energy, thermal power units as key facilities for power supply, their expansion project is crucial to meet the growing demand for electricity, in the thermal power unit expansion project, pipe welding operation is the core link, it is directly related to the sealing, stability and safety of the whole unit system, all kinds of steam pipes, water pipes, etc., need to be connected by high-quality welding process to ensure that the pipe system can run reliably under the harsh conditions of high temperature, high pressure and high corrosion, and ensure the efficient power generation of thermal power unit;

[0003] However, in the traditional pipe welding process, the two pipes to be welded are placed horizontally and fixed on the rotating device, the welding gun of the welding equipment is fixed at the appropriate position, and the welding operation is continuously carried out on the welding part of the pipe, so that the formation and filling of the molten pool during welding become unstable when the pipe rotates, the weld appears uneven height, different width, which seriously affects the strength and sealing of the welded joint, at the same time, the harmful gas generated during welding poses a long-term and serious threat to the health of workers, not only damages their health and causes various diseases, but also increases the economic burden of enterprises due to the reduction of work efficiency and increase of labor cost. SUMMARY

[0004] The purpose of the present application is to provide a solution to the problem that uneven height and different width easily occur when welding by rotating the pipe, which seriously affects the strength and sealing of the welded joint; the present application also aims to solve the problem that harmful gas generated during welding poses a long-term and serious threat to the health of workers.

[0005] Technical scheme: A multifunctional welding device for thermal power unit expansion project construction, comprising a bottom plate, the upper surface of the bottom plate is symmetrically fixedly connected with clamping mechanisms, welding mechanisms are arranged between the two clamping mechanisms, and a filtering mechanism is arranged above the welding mechanisms.

[0006] The clamping mechanism includes fixed seats. Each of the two fixed seats has an arc-shaped groove on its upper surface. A pipe is installed inside each of the two arc-shaped grooves. The opposite sides of the two pipes are in contact and located inside the welding mechanism. Movable plates are slidably connected inside each of the two fixed seats. Connecting plates are symmetrically fixedly connected to the upper surfaces of each of the two movable plates. The upper surfaces of multiple connecting plates extend above the two fixed seats. Arc-shaped clamping plates are commonly fixedly connected to the opposite sides of adjacent connecting plates. Electric telescopic rods are fixedly connected to the lower inner surfaces of the two fixed seats. The output ends of the two electric telescopic rods are fixedly connected to the lower surfaces of the two movable plates.

[0007] Furthermore, the welding mechanism includes a fixed ring, a movable ring rotatably connected to the inner wall of the fixed ring, an electric telescopic rod II fixedly connected to the inner wall of the movable ring, and a welding head fixedly connected to the output end of the electric telescopic rod II.

[0008] Furthermore, the lower surface of the base plate is fixedly connected with casters.

[0009] Furthermore, the upper surface of the base plate is symmetrically fixedly connected with side plates, and each of the two side plates has a through-type adjustment groove on its opposite side. Each of the two adjustment grooves has a slider connected to it in a sliding manner. The opposite sides of the two sliders are fixedly connected with a U-shaped plate. A drive motor is fixedly connected to the left side of the U-shaped plate. A gear is symmetrically fixedly connected to the outer wall of the output shaft of the drive motor. Multiple tooth blocks are fixedly connected to the outer wall of the movable ring on both sides of the fixed ring. The outer walls of the two gears mesh with the outer walls of the multiple tooth blocks respectively.

[0010] Furthermore, the upper surface of the base plate and the lower surface of the U-shaped plate are symmetrically provided with electric telescopic rods three, the upper surfaces of the two sliders one are fixedly connected with support rods one, the top ends of the two support rods one are fixedly connected with sliders two, and the opposite sides of the two sliders two are fixedly connected to the outer wall of the fixing ring.

[0011] Furthermore, the filtration mechanism includes a filter box located above the two side plates. A connecting plate two is symmetrically fixedly connected to the lower surfaces of the two filter boxes. The lower surfaces of the two connecting plates two are respectively fixedly connected to the upper surfaces of the two sliders two. A partition is fixedly connected to the inner wall of the filter box. A centrifugal fan assembly is fixedly connected to the left side of the filter box. The output end of the centrifugal fan assembly is connected to the interior of the filter box and above the partition. Multiple suction pipes are arranged on the inner wall of the filter box and below the partition. Multiple suction hoods are arranged on the outer walls of the multiple suction pipes. The interiors of the multiple suction pipes are connected to the input end of the centrifugal fan assembly. An activated carbon mesh is embedded in the upper surface of the filter box.

[0012] Furthermore, the lower surface of the filter box is symmetrically fixedly connected with support plates, and a rotating rod is rotatably connected between the two support plates via a rotating shaft. Gears II are symmetrically fixedly connected to the outer walls of the rotating rods, and the outer walls of the two gears II are respectively meshed with the outer walls of multiple gear blocks I. A rotating circular plate is provided on the outer side of the right support plate, and gear blocks II are fixedly connected to the outer wall of the rotating circular plate. A support rod II is rotatably connected to the right side of the filter box via a rotating shaft, and a gear III is fixedly connected to the right end of the support rod II. The outer wall of the gear III is meshed with the outer walls of multiple gear blocks II. Multiple synchronous pulleys are provided on the outer wall of the filter box and above the gear III. A synchronous belt is meshed with the inner walls of the multiple synchronous pulleys. The left center of the multiple synchronous pulleys is fixedly connected to the right center of the multiple suction pipes. A movable circular plate is fixedly connected to the right side of the middle synchronous pulley, and a connecting rod is rotatably connected to the right side of the movable circular plate and the right side of the gear III via a rotating shaft.

[0013] Furthermore, a torsion spring is fitted on the outer wall of the second support rod, and the two ends of the torsion spring are fixedly connected to the right side of the filter box and the left side of the third gear, respectively.

[0014] Furthermore, each of the two mounting bases has a maintenance plate fixedly connected to its opposite side by multiple bolts.

[0015] Beneficial effects: This invention achieves stable fixation of the pipeline through a clamping mechanism. The electric telescopic rod pushes the movable plate and the connecting plate to drive the arc-shaped clamping plate to clamp the pipeline. The adaptive design of the arc groove and the arc-shaped clamping plate allows pipelines of different diameters to be accurately positioned. The pipeline remains stationary throughout the welding process. At the same time, the welding mechanism drives the gear and the tooth block to mesh through the drive motor, so that the movable ring drives the welding head to make a circular motion around the pipeline. With the precise adjustment of the distance between the welding heads by the electric telescopic rod, the weld formation is ensured to be uniform and consistent, which fundamentally improves the strength and sealing of the welded joint and meets the high pressure and high temperature operation requirements of thermal power unit pipelines.

[0016] This invention utilizes the negative pressure generated by the centrifugal fan assembly to enable the suction hood to quickly capture harmful gases such as nitrogen oxides and carbon monoxide produced during welding. Simultaneously, the linkage design between gear two and gear block one allows the suction pipe to rotate synchronously and periodically with the welding head, expanding the suction range and preventing gas leakage. After the gas enters the filter box through the suction pipe, a baffle guides it through an activated carbon mesh. The porous activated carbon mesh effectively adsorbs toxic substances, and the purified gas is then discharged. The synchronous lifting design of the filtration and welding mechanisms ensures that the suction hood is always in the optimal collection position regardless of the pipe diameter being welded, completely solving the problem of harmful gas diffusion and creating a safe working environment for workers.

[0017] This invention utilizes an electric telescopic rod to synchronously raise and lower a U-shaped plate, a fixing ring, and a filter mechanism, ensuring precise alignment of the welding and filtering mechanisms with the pipe center. The telescopic adjustment of the electric telescopic rod and the structural design of the arc-shaped clamping plate enable stable clamping of pipes of different diameters without the need to replace special clamps. The casters on the underside of the base plate allow the device to be flexibly moved to any work position on the construction site. It is particularly suitable for the dispersed welding needs in thermal power unit expansion projects, reducing equipment handling and debugging time, lowering the intensity of manual operation, and improving overall construction efficiency. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the overall rear view structure of the present invention;

[0020] Figure 3 This is a bottom view schematic diagram of the welding mechanism and the filtering mechanism of the present invention;

[0021] Figure 4 This is a front view structural schematic diagram of the cross-section of the welding mechanism and the filtering mechanism of the present invention;

[0022] Figure 5 This is a side view of the cross-section of the clamping mechanism of the present invention;

[0023] Figure 6 This is the present invention. Figure 3 Enlarged structural diagram at point A;

[0024] Figure 7 This is the present invention. Figure 4 A magnified structural diagram at point B in the middle.

[0025] In the diagram: 1. Base plate; 2. Clamping mechanism; 3. Welding mechanism; 4. Filtering mechanism; 5. Casters; 201. Fixed base; 202. Arc groove; 203. Pipe; 204. Movable plate; 205. Connecting plate one; 206. Arc clamping plate; 207. Electric telescopic rod one; 208. Inspection plate; 301. Fixed ring; 302. Movable ring; 303. Electric telescopic rod two; 304. Welding head; 305. Side plate; 306. Adjustment groove; 307. Slider one; 308. U-shaped plate; 309. Drive motor; 310. Gear one; 31 1. Gear Block 1; 312. Electric Telescopic Rod 3; 313. Support Rod 1; 314. Slider 2; 401. Filter Box; 402. Connecting Plate 2; 403. Partition Plate; 404. Centrifugal Fan Assembly; 405. Suction Pipe; 406. Suction Hood; 407. Activated Carbon Mesh; 408. Support Plate; 409. Rotating Rod; 410. Gear 2; 411. Rotating Circular Plate; 412. Gear Block 2; 413. Support Rod 2; 414. Gear 3; 415. Synchronous Pulley; 416. Synchronous Belt; 417. Movable Circular Plate; 418. Connecting Rod; 419. Torsion Spring. Detailed Implementation

[0026] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example

[0028] like Figure 1 and Figure 2 As shown, casters 5 are fixedly connected to the lower surface of the base plate 1;

[0029] The equipment can be easily moved around the complex construction site of the thermal power unit expansion project by the multiple casters 5. The equipment can be accurately stopped at different welding positions and can be operated flexibly. This solves the problem that traditional fixed welding equipment is difficult to adapt to the needs of dispersed welding operations. At the same time, the casters 5 are equipped with a braking and locking structure. When the equipment moves to the target position, the casters 5 can be fixed in place by locking the braking device, ensuring that the equipment remains stable during clamping and welding operations and avoiding the impact of equipment displacement on welding accuracy.

[0030] like Figures 1-7As shown, a multi-functional welding device for the construction of thermal power unit expansion projects is provided, including a base plate 1. Clamping mechanisms 2 are symmetrically fixedly connected to the upper surface of the base plate 1. A welding mechanism 3 is arranged between the two clamping mechanisms 2, and a filtering mechanism 4 is arranged above the welding mechanism 3. The clamping mechanism 2 includes a fixed base 201. An arc-shaped groove 202 is formed on the upper surface of each of the two fixed bases 201. A pipe 203 is arranged inside each of the two arc-shaped grooves 202. The opposite sides of the two pipes 203 are in contact and located inside the welding mechanism 3. Movable plates 204 are slidably connected inside the fixed base 201. Connecting plates 205 are symmetrically fixedly connected to the upper surfaces of the two movable plates 204. The upper surfaces of multiple connecting plates 205 extend above the two fixed bases 201. Arc-shaped clamping plates 206 are fixedly connected to the opposite sides of the two adjacent connecting plates 205. Electric telescopic rods 207 are fixedly connected to the lower surfaces of the two fixed bases 201. The output ends of the two electric telescopic rods 207 are fixedly connected to the lower surfaces of the two movable plates 204 respectively.

[0031] In use, firstly, place the two pipes 203 to be welded into the arc-shaped grooves 202 on the upper surface of the fixed seats 201 of the two clamping mechanisms 2, so that the opposite sides of the two pipes 203 are precisely aligned and located inside the welding mechanism 3. Then, activate the electric telescopic rod 207 inside the fixed seat 201. The output end of the electric telescopic rod 207 pushes the movable plate 204 to slide downwards inside the fixed seat 201. The movable plate 204 drives the connecting plate 205 on the upper surface to descend simultaneously. The connecting plate 205 drives the arc-shaped clamping plate 206 to gradually approach the outer wall of the pipe 203 until the arc-shaped clamping plate 206 is tightly fitted with the pipe 203, achieving a stable clamping of the pipe 203. Furthermore, since the electric telescopic rod 207 can flexibly adjust the height of the movable plate 204, the arc-shaped clamping plate 206 can adapt to different pipe diameters. The pipe 203 can meet diverse welding needs without changing the clamping components, effectively improving the versatility of the device. After the pipes 203 on both sides are fixed, the welding mechanism 3 is started to weld the joint of the two pipes 203. The toxic gases generated during the welding process are promptly sucked in and purified by the filter mechanism 4 above, preventing harmful gases from spreading into the air and endangering the health of the workers. The entire process does not require manual rotation of the pipe 203. The stable fixation of the clamping mechanism 2 ensures that the pipe 203 will not loosen or shift during the welding process, ensuring the flatness and sealing of the weld joint and improving the welding quality. At the same time, the integrated clamping, welding and filtering design reduces the process connection time, improves the construction efficiency of pipe 203 welding in thermal power unit expansion projects, and reduces the intensity of manual operation.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 ,Figure 6 and Figure 7 As shown, the welding mechanism 3 includes a fixed ring 301, a movable ring 302 rotatably connected to the inner wall of the fixed ring 301, an electric telescopic rod 303 fixedly connected to the inner wall of the movable ring 302, and a welding head 304 fixedly connected to the output end of the electric telescopic rod 303.

[0033] Side plates 305 are symmetrically fixedly connected to the upper surface of the base plate 1. A through-type adjustment groove 306 is provided on the opposite side of the two side plates 305. A slider 307 is slidably connected inside the two adjustment grooves 306. A U-shaped plate 308 is fixedly connected to the opposite side of the two sliders 307. A drive motor 309 is fixedly connected to the left side of the U-shaped plate 308. Gears 310 are symmetrically fixedly connected to the outer wall of the output shaft of the drive motor 309. Multiple tooth blocks 311 are fixedly connected to the outer wall of the movable ring 302 and located on both sides of the fixed ring 301. The outer walls of the two gears 310 mesh with the outer walls of the multiple tooth blocks 311 respectively.

[0034] First, based on the pipe diameter and connection position of the pipe 203 to be welded, the operator can control the U-shaped plate 308 to drive the sliders 307 on both sides to slide within the adjustment grooves 306 of the side plate 305. This moves the U-shaped plate 308 and the connected drive motor 309 to a suitable height corresponding to the fixed ring 301 and the movable ring 302, ensuring that the gear 310 on the output shaft of the drive motor 309 and the toothed block 311 on the outer wall of the movable ring 302 maintain a stable meshing state. Then, by controlling the extension and retraction of the electric telescopic rod 303, the distance between the welding head 304 and the outer wall of the pipe 203 is precisely adjusted, so that the welding head 304 reaches the optimal welding spacing, thereby further meeting the welding requirements of pipes 203 with different diameters. Once the position of the welding head 304 is adjusted to be ready, the welding head 304 is started. Simultaneously, the drive motor 309 is activated, and the output shaft of the drive motor 309 drives two symmetrically arranged gears 310 to rotate synchronously. Since the gears 310 mesh with the tooth blocks 311 on both sides of the movable ring 302, the movable ring 302 is driven to rotate stably on the inner wall of the fixed ring 301. During the rotation of the movable ring 302, the electric telescopic rod 303 on its inner wall and the welding head 304 move in a circular motion. The welding head 304 continuously performs circumferential welding on the joint of the pipe 203. The meshing transmission of the gears 310 and the tooth blocks 311 ensures the smoothness and consistency of the rotation speed of the movable ring 302, making the weld seam uniform and flat. The operation of the entire welding mechanism 3 does not require manual intervention in the welding trajectory. Through the precise control of the mechanical structure, automated and highly adaptable welding operations are achieved.

[0035] like Figure 3 and Figure 4As shown, the upper surface of the base plate 1 and the lower surface of the U-shaped plate 308 are symmetrically provided with electric telescopic rods 312. The upper surfaces of the two sliders 307 are fixedly connected with support rods 313. The top ends of the two support rods 313 are fixedly connected with sliders 314. The opposite sides of the two sliders 314 are fixedly connected to the outer wall of the fixing ring 301.

[0036] By activating the two electric telescopic rods 312, their output ends extend and retract synchronously, directly driving the U-shaped plate 308 to move up and down along the adjustment groove 306 of the side plate 305. At the same time, the sliders 307 on both sides of the U-shaped plate 308 drive the support rod 313 fixed on the upper surface to rise and fall synchronously. The slider 314 at the top of the support rod 313 moves in tandem, thereby pulling the fixed ring 301 and the inner movable ring 302 to rise and fall synchronously. This allows the fixed ring 301 and the movable ring 302 to be precisely adjusted to the center of the two pipes 203. After the height is adjusted to the correct position, the gear 310 on the output shaft of the drive motor 309 is kept in stable mesh with the tooth block 311 on the outer wall of the movable ring 302. Then, the electric telescopic rod 303 fixed on the inner wall of the movable ring 302 is activated. The distance between the welding head 304 and the outer wall of the pipe 203 is precisely adjusted by the extension and retraction of its output end, so that the welding head 304 is at the optimal welding distance, further meeting the welding requirements of pipes 203 of different diameters.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the filtration mechanism 4 includes a filter box 401, which is located above two side plates 305. Connecting plates 402 are symmetrically fixedly connected to the lower surfaces of the two filter boxes 401. The lower surfaces of the two connecting plates 402 are respectively fixedly connected to the upper surfaces of two sliders 314. A partition 403 is fixedly connected to the inner wall of the filter box 401. A centrifugal fan assembly 404 is fixedly connected to the left side of the filter box 401. The output end of the centrifugal fan assembly 404 is connected to the interior of the filter box 401 and above the partition 403. Multiple suction pipes 405 are provided on the inner wall of the filter box 401 and below the partition 403. Multiple suction hoods 406 are provided on the outer walls of the multiple suction pipes 405. The interior of the multiple suction pipes 405 is connected to the input end of the centrifugal fan assembly 404. An activated carbon mesh 407 is embedded in the upper surface of the filter box 401.

[0038] Since the filter box 401 is fixedly connected to the slider 314 via the connecting plate 402, and the slider 314 is linked to the fixing ring 301 of the welding mechanism 3, when the electric telescopic rod 312 drives the fixing ring 301 to rise and fall to the center of the pipe 203, the filter box 401 and the suction pipe 405 and suction hood 406 below it are also simultaneously adjusted to the optimal collection position directly above the welding area, ensuring that the suction hood 406 can fully cover the working range of the welding head 304. After the welding operation starts, the centrifugal fan assembly 404 is turned on simultaneously, and the negative pressure generated at its input end quickly acts on multiple suction pipes 405, causing the suction hood 406 on the outer wall of the suction pipe 405 to be lifted. 6. An adsorption force is formed, which quickly draws in toxic gases and fumes such as nitrogen oxides and carbon monoxide generated during the welding process. After the gas enters the suction pipe 405 through the suction hood 406, it is transported to the input end of the centrifugal fan assembly 404 along the pipe 203, and then transported to the interior of the filter box 401 from the output end of the centrifugal fan assembly 404. It directly enters the area above the partition 403 and finally passes through the activated carbon mesh 407 embedded in the upper surface of the filter box 401. The porous structure of the activated carbon mesh 407 can effectively adsorb toxic substances and fine particles in the gas. The purified harmless gas is discharged through the activated carbon mesh 407, thereby ensuring the health and safety of construction personnel.

[0039] like Figure 3 , Figure 4 , Figure 1 and Figure 2 As shown, support plates 408 are symmetrically fixedly connected to the lower surface of the filter box 401. A rotating rod 409 is rotatably connected between the two support plates 408 via a rotating shaft. Gears 410 are symmetrically fixedly connected to the outer walls of the rotating rod 409. The outer walls of the two gears 410 mesh with the outer walls of multiple toothed blocks 311. A rotating circular plate 411 is located on the outer side of the right support plate 408. A toothed block 412 is fixedly connected to the outer wall of the rotating circular plate 411. A support rod 413 is rotatably connected to the right side of the filter box 401 via a rotating shaft. A gear 414 is fixedly connected to the right end of the support rod 413. The outer wall of the gear 414 meshes with the outer walls of multiple toothed blocks 412. The outer walls of the filter box 401 are meshed and connected. Multiple synchronous pulleys 415 are provided on the outer walls of the filter box 401 above the gear 3 414. The inner walls of the multiple synchronous pulleys 415 are meshed and connected to a synchronous belt 416. The left center of the multiple synchronous pulleys 415 is fixedly connected to the right center of the multiple suction pipes 405 respectively. A movable circular plate 417 is fixedly connected to the right side of the middle synchronous pulley 415. The right side of the movable circular plate 417 and the right side of the gear 3 414 are rotatably connected to a connecting rod 418 through a rotating shaft. A torsion spring 419 is sleeved on the outer wall of the support rod 2 413. The two ends of the torsion spring 419 are fixedly connected to the right side of the filter box 401 and the left side of the gear 3 414 respectively.

[0040] After the welding operation is started, the movable ring 302 of the welding mechanism 3 begins to rotate under the drive of the drive motor 309. The toothed block 311 on the outer wall of the movable ring 302 meshes with the gear 410 on the rotating rod 409 between the support plate 408 below the filter box 401, directly driving the gear 410 and the rotating rod 409 to rotate synchronously. When the rotating rod 409 rotates, it drives the rotating disc 411 to rotate together. The toothed block 412 on the outer wall of the rotating disc 411 then drives the gear 414 meshing with it to rotate around the support rod 411. 13 rotates. At this time, the torsion spring 419 sleeved on the outside of the second support rod 413 undergoes elastic deformation due to the rotation of the third gear 414, storing potential energy for subsequent reset. During the rotation of the third gear 414, its right side is linked with the movable circular plate 417 on the right side of the intermediate synchronous wheel 415 through the connecting rod 418. The connecting rod 418 converts the circular motion of the third gear 414 into the reciprocating oscillation of the movable circular plate 417, thereby driving the intermediate synchronous wheel 415 to perform periodic forward and reverse rotation. The intermediate synchronous wheel 415 is connected to the synchronous belt 416 on the inner side. Power is transmitted to all synchronous pulleys 415, causing them to rotate synchronously and periodically. The center left side of each synchronous pulley 415 is fixedly connected to the right end of the suction pipe 405. Therefore, the rotation of the synchronous pulley 415 directly drives the suction pipe 405 to periodically adjust its angle around its own axis. The suction hood 406 on its outer wall swings synchronously, expanding the adsorption range from a fixed area to a dynamically covered fan-shaped area. When the movable ring 302 drives the first gear block 311 to rotate continuously, the second gear 410 and subsequent components complete one cycle of transmission. After the cycle, the torsion spring 419 releases its elastic potential energy, pushing the gear 3 414 to reset, thereby converting the continuous rotation of the movable ring 302 into the periodic angular oscillation of the suction pipe 405. All suction pipes 405 maintain consistent movement under the action of the synchronous belt 416, so that the suction hood 406 can fully cover the circumferential welding trajectory of the welding head 304, completely eliminating the adsorption blind spot in the fixed suction mode. Combined with the negative pressure adsorption of the centrifugal fan assembly 404, it achieves the collection of toxic welding gases without dead angles and effectively prevents gas leakage.

[0041] like Figure 3 and Figure 4 Figure 6 Figure 7 Figure 3 Figure 4 Figure 6 Figure 7 Figure 1 Figure 2 As shown, the two mounting bases 201 are fixedly connected to the opposite sides of each other by multiple bolts with inspection plates 208.

[0042] When maintenance is required, the staff does not need to disassemble the entire clamping mechanism 2. They only need to use tools to unscrew the bolts fixing the inspection plate 208 to remove the inspection plate 208 from the side of the fixed seat 201. They can then directly observe the sliding state of the internal movable plate 204, the connection status of the output end of the electric telescopic rod 207, and the wear degree of the inner wall of the fixed seat 201, thereby effectively reducing the difficulty of maintenance.

[0043] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A multi-functional welding device for construction of thermal power unit expansion projects, comprising a base plate (1), characterized in that: The upper surface of the base plate (1) is symmetrically fixedly connected with clamping mechanisms (2), and a welding mechanism (3) is provided between the two clamping mechanisms (2). A filtering mechanism (4) is provided above the welding mechanism (3). The clamping mechanism (2) includes a fixed base (201), and an arc-shaped groove (202) is provided on the upper surface of each of the two fixed bases (201). A pipe (203) is provided on the inner side of each of the two arc-shaped grooves (202). The opposite sides of the two pipes (203) are in contact and located inside the welding mechanism (3). A movable plate (204) is slidably connected inside each of the two fixed bases (201). A connecting plate (205) is symmetrically fixedly connected to the upper surface of each of the two movable plates (204). The upper surfaces of multiple connecting plates (205) extend above the two fixed bases (201). An arc-shaped clamp (206) is fixedly connected to the opposite sides of two adjacent connecting plates (205). An electric telescopic rod (207) is fixedly connected to the lower surface of the two fixed bases (201). The output ends of the two electric telescopic rods (207) are fixedly connected to the lower surface of the two movable plates (204).

2. The multi-functional welding device for construction of thermal power unit expansion projects according to claim 1, characterized in that: The welding mechanism (3) includes a fixed ring (301), a movable ring (302) is rotatably connected to the inner wall of the fixed ring (301), an electric telescopic rod (303) is fixedly connected to the inner wall of the movable ring (302), and a welding head (304) is fixedly connected to the output end of the electric telescopic rod (303).

3. The multi-functional welding device for construction of thermal power unit expansion projects according to claim 1, characterized in that: The bottom surface of the base plate (1) is fixedly connected with casters (5).

4. A multi-functional welding device for construction of thermal power unit expansion projects according to claim 2, characterized in that: The upper surface of the base plate (1) is symmetrically fixedly connected with side plates (305). Each of the two side plates (305) has a through-type adjustment groove (306) on its opposite side. Each of the two adjustment grooves (306) has a slider (307) slidably connected inside. Each of the two sliders (307) has a U-shaped plate (308) fixedly connected on its opposite side. A drive motor (309) is fixedly connected to the left side of the U-shaped plate (308). A gear (310) is symmetrically fixedly connected to the outer wall of the output shaft of the drive motor (309). Multiple tooth blocks (311) are fixedly connected to the outer wall of the movable ring (302) and located on both sides of the fixed ring (301). The outer walls of the two gears (310) mesh with the outer walls of the multiple tooth blocks (311).

5. A multi-functional welding device for construction of thermal power unit expansion projects according to claim 4, characterized in that: The upper surface of the base plate (1) and the lower surface of the U-shaped plate (308) are symmetrically provided with electric telescopic rods three (312). The upper surfaces of the two sliders one (307) are fixedly connected with support rods one (313). The top ends of the two support rods one (313) are fixedly connected with sliders two (314). The opposite sides of the two sliders two (314) are fixedly connected to the outer side wall of the fixing ring (301).

6. A multi-functional welding device for construction of thermal power unit expansion projects according to claim 5, characterized in that: The filtration mechanism (4) includes a filter box (401), which is located above the two side plates (305). Connecting plates (402) are symmetrically fixedly connected to the lower surfaces of the two filter boxes (401). The lower surfaces of the two connecting plates (402) are respectively fixedly connected to the upper surfaces of the two sliders (314). A partition plate (403) is fixedly connected to the inner wall of the filter box (401). A centrifugal fan assembly (404) is fixedly connected to the left side of the filter box (401). The output end of component (404) is connected to the interior of the filter box (401) and above the partition (403). Multiple suction pipes (405) are provided on the inner side wall of the filter box (401) and below the partition (403). Multiple suction hoods (406) are provided on the outer side wall of each of the multiple suction pipes (405). The interior of each of the multiple suction pipes (405) is connected to the input end of the centrifugal fan assembly (404). An activated carbon mesh (407) is embedded in the upper surface of the filter box (401).

7. A multi-functional welding device for construction of thermal power unit expansion projects according to claim 6, characterized in that: The lower surface of the filter box (401) is symmetrically fixedly connected with support plates (408). The two support plates (408) are rotatably connected to a rotating rod (409) via a rotating shaft. The outer walls of the rotating rod (409) are symmetrically fixedly connected with gears (410). The outer walls of the two gears (410) are respectively meshed with the outer walls of multiple gear blocks (311). A rotating circular plate (411) is provided on the outer side of the support plate (408) on the right side. The outer wall of the rotating circular plate (411) is fixedly connected with gear blocks (412). The right side of the filter box (401) is rotatably connected with a support rod (413) via a rotating shaft. The right end of the support rod (413) is fixedly connected with a gear. The outer wall of the gear three (414) meshes with the outer walls of the multiple gear blocks two (412). The outer wall of the filter box (401) and above the gear three (414) is provided with multiple synchronous pulleys (415). The inner walls of the multiple synchronous pulleys (415) mesh with a synchronous belt (416). The left center of the multiple synchronous pulleys (415) is fixedly connected to the right center of the multiple suction pipes (405). A movable circular plate (417) is fixedly connected to the right side of the middle synchronous pulley (415). The right side of the movable circular plate (417) and the right side of the gear three (414) are rotatably connected to a connecting rod (418) through a rotating shaft.

8. A multi-functional welding device for construction of thermal power unit expansion projects according to claim 7, characterized in that: The outer wall of the second support rod (413) is fitted with a torsion spring (419), and the two ends of the torsion spring (419) are fixedly connected to the right side of the filter box (401) and the left side of the third gear (414), respectively.

9. A multi-functional welding device for construction of thermal power unit expansion projects according to claim 1, characterized in that: Both of the two mounting bases (201) have inspection plates (208) fixedly connected to their opposite sides by multiple bolts.

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