Auxiliary welding device for water wall tube row of biomass garbage power generation boiler and construction method

Abstract

The invention discloses a biomass garbage power generation boiler water wall tube row welding auxiliary device and a construction method.The welding auxiliary device comprises a construction frame, an inner frame and a displacement frame, supporting legs are arranged at the bottom of the construction frame, the inner frame is arranged between the inner walls of the supporting legs, and the displacement frame is slidably connected to the inner frame; a supporting frame is connected to the upper portion of the displacement frame through an air cylinder. According to the invention, the pipelines are uniformly placed on the scaffold for regional splicing and welding, so that the welding quality of each region can be strictly controlled; by adopting the measures of cooperation of multiple cranes, reasonable arrangement of lifting points, protection of steel members by using back irons and soft materials and the like, the construction risk is reduced, and the safety of constructors and equipment is guaranteed.

Description

Technical Field

[0001] The present invention relates to a water-cooled wall installation method, and in particular to a water-cooled wall pipe row welding auxiliary device and construction method for a biomass waste power generation boiler, belonging to the technical field of boiler equipment installation. Background Art

[0002] During the construction of biomass waste power generation boilers, the welding of water-cooled wall tubes is a critical and complex task. As an important heating surface of the boiler, the welding quality of the water-cooled wall directly affects the overall performance and operational safety of the boiler. Traditional water-cooled wall tube welding construction has many problems. On the one hand, during the welding process, there is a lack of effective auxiliary devices to accurately position and support the tubes, which causes the tubes to deform easily during welding and makes it difficult to ensure welding accuracy, thus affecting the overall structural strength and heat transfer efficiency of the water-cooled wall. On the other hand, the existing hoisting process is cumbersome and has low safety requirements when lifting, transporting and installing the water-cooled wall. It also has high requirements for construction sites and equipment, increasing construction costs and difficulty. At the same time, due to the particularity of biomass waste power generation boilers, the welding environment of its water-cooled wall tubes is relatively complex, and traditional methods are difficult to adapt to. There is an urgent need for a highly targeted, efficient and reliable welding auxiliary device and construction method. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a water-cooled wall tube row welding auxiliary device and construction method for a biomass waste power generation boiler, which can improve the welding quality and efficiency of the water-cooled wall tube row, reduce the construction difficulty and cost, and ensure the safe and stable operation of the biomass waste power generation boiler.

[0004] The technical solution adopted by the present invention to solve the technical problem is: A biomass waste power generation boiler water-cooled wall tube row welding auxiliary device includes a construction frame, an inner frame and a displacement frame. The bottom of the construction frame is provided with support legs, the inner frame is provided between the inner walls of the support legs, the displacement frame is slidably connected to the inner frame, and the upper part of the displacement frame is connected to a support frame via a cylinder.

[0005] The inner frame is located at a lower position inside the construction frame, and displacement tracks are provided on both sides of the inner frame.

[0006] There are two cylinders, which are respectively located at the diagonal positions of the displacement frame. The displacement frame is connected to the displacement track through a slider.

[0007] A bearing seat is provided in the middle of both ends of the inner frame, and a lead screw is rotatably connected between the two bearing seats. The lead screw is connected to the nut at the bottom of the displacement frame through a thread, and a motor is provided at the right end of the lead screw.

[0008] The construction method of the water-cooled wall tube row welding auxiliary device for a biomass waste power generation boiler comprises the following steps: S1. Place the pipes on the construction frame and assemble them in different areas. When welding pipes or pipe banks in different areas, use the motor to move the displacement frame to the bottom of the pipes or pipe banks in that area, start the cylinder to lift the pipes or pipe banks in that area, and then perform welding construction on the pipes or pipe banks in that area. S2. Hoisting sequence: First, the left and right water-cooled walls and headers are welded together, and then hoisted as a whole. Then, the front and rear water-cooled walls and headers are welded together, and then hoisted as a whole. Finally, the upper and middle tube banks and headers are welded together, and then hoisted. S3. Use a 400-ton truck crane as the main lifting equipment, with two lifting points; an 80-ton truck crane and a 25-ton truck crane are auxiliary lifting equipment, of which the 80-ton truck crane is located in the middle of the water-cooled wall and uses two lifting points, and the 25-ton truck crane is located at the rear of the water-cooled wall and uses two lifting points; S4. Before hoisting, pass the steel wire rope through the uppermost, lowermost and middle rigid beams of the water-cooled wall and tie them together. Use guard iron or soft materials to pad the tying area to prevent damage to the steel structure. S5. When lifting, first lift the steel beam 200-300 mm off the ground, thoroughly check the rope buckle, and then slowly raise the hook; when the water-cooled wall is fully erected, use the auxiliary crane to remove the hook and lift the water-cooled wall above the column top; S6. Use the slip rope to rotate the water-cooled wall to align it with the corresponding installation position; S7. After the hook is in place, the hoisting operator uses a manual hoist to pull the water-cooled wall to the top beam hanging position.

[0009] The positive beneficial effects of the present invention are: 1. The present invention uses a motor to drive the lead screw, which can accurately control the sliding of the displacement frame on the displacement track and quickly move it to the bottom of the pipes or pipe banks in different areas, making it convenient for workers to weld the pipe banks in different areas, greatly improving construction efficiency.

[0010] 2. The present invention provides stable support for the pipes of the water-cooled wall by setting up a construction frame, which makes it easier for workers to assemble the pipe rows and effectively reduces the deformation of the pipe rows during welding, thereby improving welding accuracy and ensuring the structural strength and heat transfer efficiency of the water-cooled wall.

[0011] 3. The present invention places the pipelines uniformly on the construction frame for regional assembly and welding, which facilitates strict control of the welding quality of each area. Construction personnel can focus more on the welding work in a single area and accurately adjust the welding parameters. It also facilitates real-time monitoring and inspection of the welding process, timely detection and correction of welding defects, and ensures the consistency of welding quality of the entire water-cooled wall tube row.

[0012] 4. The present invention adopts a 400-ton truck crane as the main lifting equipment, 80-ton and 25-ton truck cranes as auxiliary lifting equipment, and reasonably sets lifting points at different positions of the water-cooled wall to form a stable lifting system; this configuration and lifting point setting method can evenly distribute the weight of the water-cooled wall, avoid local excessive force during the lifting process, reduce the risk of damage to the water-cooled wall during the lifting process, and improve the safety of the lifting.

[0013] 5. This invention implements a rigorous and standardized lifting process, from pre-lifting wire rope bundling and iron or soft material protection, to inspection and slow hook raising during lifting, to rotating the water-cooled wall into position and finally securing it by traction. A comprehensive inspection of the rope clips before lifting effectively avoids lifting accidents caused by loose or damaged clips. Using a sliding rope to rotate the water-cooled wall and a manual hoist to pull it into position allows for precise control of the water-cooled wall's position, keeping the installation position deviation within ±5mm. This improves installation accuracy, reduces subsequent adjustment work, and ensures the quality of the water-cooled wall installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the welding auxiliary equipment of the present invention; Figure 2 It is a structural schematic diagram of the inner frame of the present invention; Figure 3 This is a schematic diagram of the water-cooled wall hoisting facade structure of the present invention; Figure 4 This is a schematic diagram of the hoisting of the water-cooled wall of the present invention; Among them: 1- construction frame, 2- support legs, 3- inner frame, 4- displacement track, 5- displacement frame, 6- cylinder, 7- support frame, 8- bearing seat, 9- motor, 10- lead screw, 11- 400t truck crane, 12- 80t truck crane, 13- 25t truck crane, 14- water-cooled wall. DETAILED DESCRIPTION

[0015] The present invention will be further explained and illustrated below with reference to the accompanying drawings: Example 1, see Figure 1-Figure 2A biomass waste power generation boiler water-cooled wall tube row welding auxiliary device includes a construction frame 1, an inner frame 3 and a displacement frame 5. Support legs 2 are provided at the bottom of the construction frame 1, and the inner frame 3 is provided between the inner walls of the support legs 2. The displacement frame 5 is slidably connected to the inner frame 3, and the upper part of the displacement frame 5 is connected to a support frame 7 through a cylinder 6.

[0016] The inner frame 3 is located at a lower position inside the construction frame 1 , and displacement tracks 4 are provided on both sides of the inner frame 3 .

[0017] There are two cylinders 6, which are respectively located at the diagonal positions of the displacement frame 5. The displacement frame 5 is connected to the displacement track 4 through a slider.

[0018] A bearing seat 8 is provided in the middle of both ends of the inner frame 3, and a screw 10 is rotatably connected between the two bearing seats 8. The screw 10 is connected to the nut at the bottom of the displacement frame 5 through a thread, and a motor 9 is provided at the right end of the screw 10.

[0019] In the above description, the inner frame is located at a lower position inside the construction frame; and the supporting frame is located inside the construction frame.

[0020] In the above description, when the cylinder is in the reset state, the support frame is located below the construction frame.

[0021] In the above description, a nut is provided at the center of the bottom of the displacement frame, and the lead screw passes through the nut and is connected to the nut through threads.

[0022] In the above description, under the action of the motor, the displacement frame moves horizontally along the lead screw.

[0023] In the above description, a support plate is provided at the bottom of the motor, and the support plate is connected to the right end of the inner frame.

[0024] Example 2, see Figure 3-Figure 4 The construction method of the above-mentioned biomass waste power generation boiler water-cooled wall tube row welding auxiliary device includes the following steps: S1. Pipes are uniformly placed on the construction frame 1 for regional assembly. When welding pipes or pipe banks in different areas, the displacement frame 5 is moved to the bottom of the pipes or pipe banks in the area by the motor 9, and the cylinder 6 is activated to lift the pipes or pipe banks in the area, and welding construction is performed on the pipes or pipe banks in the area. S2. Hoisting sequence: First, the left and right water-cooled walls and headers are welded together, and then hoisted as a whole. Then, the front and rear water-cooled walls and headers are welded together, and then hoisted as a whole. Finally, the upper and middle tube banks and headers are welded together, and then hoisted. S3. Use a 400-ton truck crane as the main lifting equipment, with two lifting points; an 80-ton truck crane and a 25-ton truck crane are auxiliary lifting equipment, of which the 80-ton truck crane is located in the middle of the water-cooled wall and uses two lifting points, and the 25-ton truck crane is located at the rear of the water-cooled wall and uses two lifting points; S4. Before hoisting, pass the steel wire rope through the uppermost, lowermost and middle rigid beams of the water-cooled wall and tie them together. Use guard iron or soft materials to pad the tying area to prevent damage to the steel structure. S5. When lifting, first lift the steel beam 200-300 mm off the ground, thoroughly check the rope buckle, and then slowly raise the hook; when the water-cooled wall is fully erected, use the auxiliary crane to remove the hook and lift the water-cooled wall above the column top; S6. Use the slip rope to rotate the water-cooled wall to align it with the corresponding installation position; S7. After the hook is in place, the hoisting operator uses a manual hoist to pull the water-cooled wall to the top beam hanging position.

[0025] In the above description, the pipes can be combined in different areas on the construction frame, and then all the pipe rows can be combined. This not only improves work efficiency but also ensures welding quality.

[0026] In the above description, by arranging the cylinder between the displacement frame and the support frame, it is convenient to weld the pipe rows in different areas.

[0027] The present invention places the pipelines uniformly on a construction frame for regional assembly and welding, thereby facilitating strict control of the welding quality in each area. By adopting measures such as the coordination of multiple cranes, the rational setting of lifting points, and the use of guard irons and soft materials to protect steel components, the construction risks are reduced and the safety of construction personnel and equipment is guaranteed.

Claims

1. A biomass waste power generation boiler water wall tube row welding auxiliary device, comprising a construction frame (1), an inner frame (3) and a displacement frame (5), characterized in that: The bottom of the construction frame (1) is provided with supporting legs (2), an inner frame (3) is provided between the inner walls of the supporting legs (2), a displacement frame (5) is slidably connected to the inner frame (3), and the upper portion of the displacement frame (5) is connected to a supporting frame (7) via a cylinder (6).

2. The biomass waste power generation boiler water wall tube welding auxiliary device according to claim 1, characterized in that: The inner frame (3) is located at a lower position inside the construction frame (1), and displacement tracks (4) are provided on both sides of the inner frame (3).

3. The biomass waste power generation boiler water wall tube welding auxiliary device according to claim 1, characterized in that: There are two cylinders (6), which are respectively located at the diagonal positions of the displacement frame (5). The displacement frame (5) is connected to the displacement track (4) via a slider.

4. The biomass waste power generation boiler water wall tube row welding auxiliary device according to claim 1, characterized in that: A bearing seat (8) is provided in the middle of both ends of the inner frame (3), and a lead screw (10) is rotatably connected between the two bearing seats (8). The lead screw (10) is connected to a nut at the bottom of the displacement frame (5) through a thread, and a motor (9) is provided at the right end of the lead screw (10).

5. The construction method of a biomass waste power generation boiler water wall tube row welding auxiliary device according to any one of claims 1 to 4, characterized in that: The steps include: S1. The pipes are uniformly placed on the construction frame (1) for regional assembly. When welding the pipes or pipe rows in different regions, the displacement frame (5) is moved to the bottom of the pipes or pipe rows in the region by using the motor (9), and the cylinder (6) is activated to lift the pipes or pipe rows in the region, and welding construction is performed on the pipes or pipe rows in the region; S2. Hoisting sequence: First, the left and right water-cooled walls and headers are welded together, and then hoisted as a whole. Then, the front and rear water-cooled walls and headers are welded together, and then hoisted as a whole. Finally, the upper and middle tube banks and headers are welded together, and then hoisted. S3. Use a 400-ton truck crane as the main lifting equipment, with two lifting points; an 80-ton truck crane and a 25-ton truck crane are auxiliary lifting equipment, of which the 80-ton truck crane is located in the middle of the water-cooled wall and uses two lifting points, and the 25-ton truck crane is located at the rear of the water-cooled wall and uses two lifting points; S4. Before hoisting, pass the steel wire rope through the uppermost, lowermost and middle rigid beams of the water-cooled wall and tie them together. Use guard iron or soft materials to pad the tying area to prevent damage to the steel structure. S5. When lifting, first lift the steel beam 200-300 mm off the ground, thoroughly check the rope buckle, and then slowly raise the hook; when the water-cooled wall is fully erected, use the auxiliary crane to remove the hook and lift the water-cooled wall above the column top; S6. Use the slip rope to rotate the water-cooled wall to align it with the corresponding installation position; S7. After the hook is in place, the hoisting operator uses a manual hoist to pull the water-cooled wall to the top beam hanging position.

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