A device and method for relieving residual stress from welding of heavy-duty box-type steel structures.

Abstract

This invention relates to the field of steel structure processing technology, and more particularly to a device and method for releasing residual stress from welding heavy-duty box-type steel structures. The device includes a rectangular plate with a slotted hole. A movable seat is slidably mounted within the slotted hole, and an impact rod is slidably mounted on the movable seat. An impact block is fixedly mounted at one end of the impact rod, and a telescopic spring is sleeved on the impact rod. A rectangular block is also fixedly mounted at one end of the impact rod. A U-shaped frame is mounted on the movable seat via a reciprocating assembly. Trapezoidal blocks are mounted at both ends of the U-shaped frame via first spring rods. A separation assembly is provided on the movable seat. This invention, through the coordinated operation of the reciprocating assembly, U-shaped frame, trapezoidal blocks, separation assembly, impact rod, and telescopic spring, drives the impact block to continuously strike the welded joint of the steel structure, removing residual stress at the weld. It eliminates the need for manual striking by workers, simplifying operation, saving time and effort, and reducing the workload of workers.

Description

Technical Field

[0001] This invention relates to the field of steel structure processing technology, and in particular to a device and method for releasing residual stress from welding heavy-duty box-type steel structures. Background Technology

[0002] Heavy-duty box-type steel structures are a widely used structural form in fields such as construction, bridges, and machinery manufacturing. They are usually welded from four steel plates with a box-shaped cross-section. This type of structure has good load-bearing capacity and stability, and can withstand large loads and external forces. During the welding process of heavy-duty box-type steel structures, residual welding stress is generated due to local high temperature and uneven cooling. These residual stresses may cause deformation and cracking of the steel structure, reducing its load-bearing capacity and service life. Therefore, it is necessary to release the residual stress in a timely manner after welding.

[0003] Hammering is a common method for removing residual stress. After the steel structure is welded, operators usually use hammers to continuously hammer the welded joints of the steel structure. However, manual hammering is very inconvenient, time-consuming and labor-intensive, increasing the workload of the operators. Summary of the Invention

[0004] The purpose of this invention is to address the following shortcomings in the prior art: manual tapping is very inconvenient, time-consuming, and labor-intensive, increasing the workload of operators. Therefore, this invention proposes a heavy-duty box-type steel structure welding residual stress release device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A residual stress relief device for welding heavy-duty box-type steel structures includes a rectangular plate with symmetrically arranged mounting holes. Each of the two mounting holes is provided with an adsorption component for adsorption onto the steel structure. The rectangular plate also has a strip-shaped hole, in which a movable seat is slidably mounted via a sliding component.

[0007] The movable seat has a movable hole, and an impact rod is vertically slidably installed in the movable hole. An impact block is fixedly installed at one end of the impact rod. A telescopic spring is sleeved on the impact rod. The two ends of the telescopic spring are fixedly connected to the impact block and the movable seat, respectively. A rectangular block is fixedly installed at the end of the impact rod away from the impact block. A rectangular hole is opened on the rectangular block.

[0008] A U-shaped frame is mounted on the movable seat via a reciprocating assembly. Trapezoidal blocks are mounted on both ends of the U-shaped frame via a first spring rod. The inclined surfaces of the two trapezoidal blocks face the movable seat. The movable seat is provided with a separation assembly for moving the two trapezoidal blocks away from each other.

[0009] As a preferred embodiment, the reciprocating assembly includes a support plate fixedly mounted on a movable seat, a reciprocating lead screw, a drive motor fixedly mounted on one end of the support plate, and a lifting block threaded onto the reciprocating lead screw. The support plate has a lifting hole, the reciprocating lead screw is rotatably mounted in the lifting hole, one end of the reciprocating lead screw passes through the lifting hole and is fixedly connected to the output shaft of the drive motor, the lifting block is slidably disposed in the lifting hole, and the lifting block is fixedly connected to the U-shaped frame.

[0010] As a preferred embodiment, the separation assembly includes two inclined plates, each fixedly mounted on two trapezoidal blocks by connecting rods, a square block mounted on a movable seat by a support component, and a triangular block fixedly mounted on the square block. The square block and the triangular block are both located on the movement path of the two inclined plates, and the two inclined plates are in an inverted V-shape.

[0011] As a preferred embodiment, the support assembly includes a first support column, a second support column, a support rod, and a limiting part for restricting the relative movement of the first and second support columns, all fixedly mounted on a movable base. The upper end of the first support column is provided with a moving groove, and one end of the second support column is slidably inserted into the moving groove. The square block is fixedly connected to the support rod.

[0012] As a preferred embodiment, the first support column has multiple limiting holes on its side that are all connected to the moving groove, and the second support column has an insertion hole on its side. The limiting component includes a second spring rod fixedly installed on the first support column and a limiting block fixedly installed on one end of the second spring rod. One end of the limiting block passes through one of the limiting holes and is inserted into the insertion hole.

[0013] As a preferred embodiment, the inner walls on both sides of the strip hole are provided with sliding grooves, and the sliding assembly includes two sliders that are slidably installed in the two sliding grooves respectively, and both sliders are fixedly connected to the movable seat.

[0014] As a preferred embodiment, the adsorption assembly includes an adsorption cylinder fixedly installed in the mounting hole, a suction cup fixedly installed at one end of the adsorption cylinder, a sealing plate slidably installed in the adsorption cylinder, and a moving component for moving the sealing plate, wherein the suction cup is connected to the inside of the adsorption cylinder.

[0015] As a preferred embodiment, the movable component includes a bracket fixedly installed at the end of the suction cylinder away from the suction cup, a threaded rod, and an adjusting block fixedly installed at one end of the threaded rod. The bracket has a threaded hole, the threaded rod is threaded into the threaded hole, and the end of the threaded rod away from the adjusting block is rotatably connected to the sealing plate.

[0016] As a preferred embodiment, a push handle is fixedly installed on the side of the movable seat, and a cylinder is fixedly installed on the push handle. A cylindrical groove is opened at one end of the cylinder near the rectangular plate. A movable column is installed in the cylindrical groove through a return spring. A spherical groove is opened at the end of the movable column away from the return spring. A ball is rolled and embedded in the spherical groove. Multiple limiting grooves are opened on the upper surface of the rectangular plate, and the ball is inserted into one of the limiting grooves.

[0017] A method for relieving residual stress from welding in a heavy-duty box-type steel structure, comprising the following steps:

[0018] The rectangular plate is fixed to the steel structure by the adsorption component, and the impact block is aligned with the weld. Then, the moving seat is pushed to move horizontally along the weld. During the movement, the reciprocating component drives the two trapezoidal blocks to move up and down through the U-shaped frame. At the same time, the separation component can continuously drive the impact rod to move back and forth. Under the action of the elastic force of the telescopic spring, the impact block is driven to hit the weld of the steel structure, thereby removing the residual stress at the weld.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. Through the cooperation of reciprocating components, U-shaped frame, trapezoidal block, separation component, impact rod and telescopic spring, the moving seat moves on the rectangular plate, so that the impact block continuously strikes the welded joint of the steel structure, thereby removing the residual stress at the welded joint. No manual hammering is required, the operation is simple, time-saving and labor-saving, and the workload of the staff is effectively reduced.

[0021] 2. By cooperating with the first support column, the second support column, the second spring rod, and the limiting block, the distance between the square block and the triangular block and the moving seat can be adjusted. The farther the distance, the greater the impact force of the impact block hitting the weld each time; the closer the distance, the smaller the impact force of the impact block hitting the weld each time. The impact force of each impact can be adjusted according to the weld of the steel structure to ensure that the residual stress at the weld is effectively removed under the appropriate impact force.

[0022] 3. Through the cooperation of the adsorption cylinder, suction cup, sealing plate and moving components, the device can be effectively adsorbed onto the steel structure for fixation, which is convenient to use and has strong stability.

[0023] 4. The push handle, cylinder, return spring, moving column, ball and limit groove cooperate with each other. Each time the ball is inserted into one of the limit grooves, the impact block impacts the weld once, thus ensuring that the impact block can impact the weld evenly and remove residual stress more evenly. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the left-side stereoscopic structure of the present invention;

[0025] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0026] Figure 3 This is a right-view stereoscopic structural diagram of the present invention;

[0027] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0028] Figure 5 This is a schematic diagram of a three-dimensional partial cross-sectional structure of the adsorption component;

[0029] Figure 6 This is a schematic diagram of the three-dimensional structure of the reciprocating component;

[0030] Figure 7 A schematic diagram of the three-dimensional exploded structure supporting the components;

[0031] Figure 8 This is a schematic diagram of a three-dimensional partial cross-sectional structure of a cylinder, a movable column, and a ball bearing.

[0032] In the diagram: 1. Rectangular plate, 2. Moving seat, 3. Impact rod, 4. Impact block, 5. Telescopic spring, 6. Rectangular block, 7. U-shaped frame, 8. First spring rod, 9. Trapezoidal block, 10. Support plate, 11. Reciprocating screw, 12. Drive motor, 13. Lifting block, 14. Connecting rod, 15. Inclined plate, 16. Square block, 17. Triangular block, 18. First support column, 19. Second support column, 20. Support rod, 21. Limiting hole, 22. Insertion hole, 23. Second spring rod, 24. Limiting block, 25. Slider, 26. Adsorption cylinder, 27. Suction cup, 28. Sealing plate, 29. Bracket, 30. Threaded rod, 31. Adjusting block, 32. Push handle, 33. Cylinder, 34. Return spring, 35. Moving column, 36. Limiting groove, 37. Ball bearing. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Reference Figures 1-8A residual stress relief device for welding heavy-duty box-type steel structures includes a rectangular plate 1 with symmetrical mounting holes. Each mounting hole contains an adsorption component for adsorption onto the steel structure. The rectangular plate 1 also has a strip-shaped hole, within which a movable seat 2 is slidably mounted via a sliding component. The inner walls on both sides of the strip-shaped hole have grooves. The sliding component includes two sliders 25, each slidably mounted in one of the two grooves. Both sliders 25 are fixedly connected to the movable seat 2. The movable seat 2 is horizontally slidably mounted on the rectangular plate 1 via the sliders 25, which can reduce the friction between the movable seat 2 and the rectangular plate 1.

[0035] The adsorption assembly includes an adsorption cylinder 26 fixedly installed in the mounting hole, a suction cup 27 fixedly installed at one end of the adsorption cylinder 26, a sealing plate 28 slidably installed in the adsorption cylinder 26, and a moving assembly for moving the sealing plate 28. The moving assembly includes a bracket 29 fixedly installed at the end of the adsorption cylinder 26 away from the suction cup 27, a threaded rod 30, and an adjusting block 31 fixedly installed at one end of the threaded rod 30. The bracket 29 has a threaded hole, and the threaded rod 30 is threaded into the threaded hole. The end of the threaded rod 30 away from the adjusting block 31 is rotatably connected to the sealing plate 28. The suction cup 27 is in communication with the inside of the adsorption cylinder 26. Rectangular plate 1 During installation, the two suction cylinders 26 are placed at both ends of the weld, so that the moving seat 2 moves to the weld. Then, the suction cup 27 contacts the surface of the steel structure. At this time, a sealed space is formed between the steel structure, the suction cup 27, the suction cylinder 26 and the sealing plate 28. Then, the adjusting block 31 is rotated, which drives the threaded rod 30 to rotate. Under the action of the threaded hole opened on the bracket 29, the threaded rod 30 will drive the sealing plate 28 to move away from the suction cup 27. At this time, the sealed space becomes larger and the pressure decreases. Under the action of pressure, the suction cup 27 and the suction cylinder 26 will be firmly adsorbed on the steel structure, thereby installing the rectangular plate 1 on the steel structure.

[0036] The movable base 2 has a movable hole, and an impact rod 3 is vertically slidably installed in the movable hole. An impact block 4 is fixedly installed at one end of the impact rod 3. A telescopic spring 5 is sleeved on the impact rod 3. The two ends of the telescopic spring 5 are fixedly connected to the impact block 4 and the movable base 2 respectively. A rectangular block 6 is fixedly installed at the end of the impact rod 3 away from the impact block 4. A rectangular hole is opened on the rectangular block 6.

[0037] The impact rod 3 is vertically slidably mounted on the movable seat 2. The impact block 4 is aligned with the weld. When the impact rod 3 is pulled away from the weld, it will move the impact block 4 away from the weld. At the same time, the telescopic spring 5 is compressed and then the impact rod 3 is released. Under the elastic force of the telescopic spring 5, it will move the impact block 4 towards the weld until the impact block 4 hits the weld and knocks it to remove the residual stress at the weld.

[0038] A U-shaped frame 7 is mounted on the movable seat 2 via a reciprocating assembly. Trapezoidal blocks 9 are mounted on both ends of the U-shaped frame 7 via a first spring rod 8. The inclined surfaces of the two trapezoidal blocks 9 face the movable seat 2. The movable seat 2 is provided with a separation assembly for driving the two trapezoidal blocks 9 away from each other.

[0039] The reciprocating assembly includes a support plate 10 fixedly mounted on the movable seat 2, a reciprocating screw 11, a drive motor 12 fixedly mounted on one end of the support plate 10, and a lifting block 13 threaded onto the reciprocating screw 11. The support plate 10 has a lifting hole, the reciprocating screw 11 is rotatably mounted in the lifting hole, one end of the reciprocating screw 11 passes through the lifting hole and is fixedly connected to the output shaft of the drive motor 12, the lifting block 13 is slidably mounted in the lifting hole, and the lifting block 13 is fixedly connected to the U-shaped frame 7. The separating assembly includes two inclined plates 15, each fixedly mounted on two trapezoidal blocks 9 by connecting rods 14, a square block 16 mounted on the movable seat 2 by a support component, and a triangular block 17 fixedly mounted on the square block 16. The square block 16 and the triangular block 17 are both located on the moving path of the two inclined plates 15, and the two inclined plates 15 are inverted V-shape.

[0040] The U-shaped frame 7 is mounted on the lifting block 13. When the device is in use, the drive motor 12 is started, and the output shaft of the drive motor 12 drives the reciprocating screw 11 to rotate. Under the action of the reciprocating screw 11, the lifting block 13 can move up and down on the support plate 10, thereby causing the U-shaped frame 7 to move up and down on the support plate 10. When the U-shaped frame 7 moves vertically downwards, it will cause the two trapezoidal blocks 9 to move towards the rectangular block 6 on the impact rod 3. The inclined surface of the trapezoidal block 9 contacts the rectangular block 6. Under the action of the inclined surface, the two trapezoidal blocks 9 will move away from each other, and the first spring rod 8 will compress until one end of the two trapezoidal blocks 9 moves to the rectangular hole. Under the action of the elastic force of the first spring rod 8, one end of the trapezoidal block 9 will insert into the rectangular hole. When the U-shaped frame 7 moves vertically upwards... When in motion, the two trapezoidal blocks 9, under the action of the rectangular block 6, drive the impact rod 3 to move vertically upward. The telescopic spring 5 is compressed. While the U-shaped frame 7 moves vertically, it drives the two inclined plates 15 to move towards the square block 16 and the triangular block 17 through the two trapezoidal blocks 9. When the two inclined plates 15 contact the square block 16, under the action of the inclined surface of the inclined plate 15, the two trapezoidal blocks 9 will move away from each other. At this time, one end of the two trapezoidal blocks 9 moves out of the rectangular hole. The rectangular block 6 separates from the two trapezoidal blocks 9. Under the action of the elastic force of the telescopic spring 5, the impact rod 3 drives the impact block 4 to hit the weld of the steel structure, thereby removing the residual stress at the weld. There is no need for the staff to manually knock it. The operation is simple, time-saving and labor-saving, and effectively reduces the workload of the staff.

[0041] As the two trapezoidal blocks 9 continue to move upward, the two inclined plates 15 will move above the square block 16 and the triangular block 17. When the lifting block 13 drives the U-shaped frame 7 to move vertically downward, one end of the two inclined plates 15 contacts the inclined surfaces on both sides of the triangular block 17, thereby causing the two inclined plates 15 to move away from each other, so that the two inclined plates 15 can move directly below the square block 16.

[0042] The support assembly includes a first support column 18 and a second support column 19 fixedly mounted on the movable base 2, a support rod 20 fixedly mounted on the second support column 19, and a limiting part for restricting the relative movement of the first support column 18 and the second support column 19. The upper end of the first support column 18 is provided with a moving groove, and one end of the second support column 19 is slidably inserted into the moving groove. The square block 16 is fixedly connected to the support rod 20. The side of the first support column 18 is provided with a plurality of limiting holes 21, all of which are connected to the moving groove. The side of the second support column 19 is provided with an insertion hole 22. The limiting part includes a second spring rod 23 fixedly mounted on the first support column 18 and a limiting block 24 fixedly mounted on one end of the second spring rod 23. One end of the limiting block 24 passes through one of the limiting holes 21 and is inserted into the insertion hole 22.

[0043] Square block 16 and triangular block 17 are mounted on movable seat 2 via first support column 18 and second support column 19. Under the elastic force of second spring rod 23, one end of limiting block 24 is inserted into limiting hole 21 and insertion hole 22, thereby restricting the relative movement of first support column 18 and second support column 19. Multiple limiting holes 21 are provided on first support column 18, allowing limiting block 24 to be inserted into different holes 21. Adjusting the overall height of first support column 18 and second support column 19 adjusts the distance between square block 16 and triangular block 17 and movable seat 2. When the distance between square block 16 and triangular block 17 and movable seat 2 is large, trapezoidal block 9 drives impact rod 3 to move. The greater the distance the movement, the greater the deformation of the telescopic spring 5 under compression. When the impact rod 3 is released, the impact force of the impact block 4 hitting the weld is also greater. When the distance between the square block 16 and the triangular block 17 and the moving seat 2 is small, the distance that the trapezoidal block 9 moves with the impact rod 3 is also smaller, the deformation of the telescopic spring 5 under compression is also smaller, and the impact force of the impact block 4 hitting the weld is also smaller. The impact force of the impact block 4 hitting the weld can be adjusted according to the size of the weld of the steel structure to avoid the impact force of the impact block 4 hitting the weld being too large or too small, and to ensure that the residual stress at the weld is effectively removed under the appropriate impact force.

[0044] A push handle 32 is fixedly installed on the side of the movable base 2. A cylinder 33 is fixedly installed on the push handle 32. A cylindrical groove is opened at one end of the cylinder 33 near the rectangular plate 1. A moving column 35 is installed in the cylindrical groove through a return spring 34. A spherical groove is opened at the end of the moving column 35 away from the return spring 34. A ball bearing 37 is rolled and embedded in the spherical groove. Multiple limiting grooves 36 are opened on the upper surface of the rectangular plate 1. The ball bearing 37 is inserted into one of the limiting grooves 36.

[0045] As the reciprocating assembly continuously drives the impact block 4 to strike the weld joint, it pushes the handle 32 to move the moving seat 2 on the rectangular plate 1, thereby driving the impact rod 3 and the impact block 4 to move along the weld joint. Multiple limiting grooves 36 are equidistantly arranged on the rectangular plate 1. During the movement of the moving seat 2, the ball 37 moves on the surface of the rectangular plate 1. When the ball 37 moves to the limiting groove 36, under the action of the return spring 34, the ball 37 will insert into the limiting groove 36. The depth of the limiting groove 36 is less than the radius of the ball 37, so that when the moving seat 2 continues to move, the ball 37 can move out of the limiting groove 36. Each time the ball 37 inserts into the limiting groove 36, the impact block 4 strikes the weld joint once, thereby ensuring that the impact block 4 can strike the weld joint evenly, making the residual stress removal more uniform.

[0046] In this invention, the rectangular plate 1 is fixed to the steel structure by the adsorption component, and the impact block 4 is aligned with the welded joint. Then, the moving seat 2 is pushed to move horizontally along the welded joint. During the movement of the moving seat 2, the reciprocating component drives the two trapezoidal blocks 9 to move up and down reciprocally through the U-shaped frame 7. At the same time, the separation component can continuously drive the impact rod 3 to move back and forth. Under the action of the elastic force of the telescopic spring 5, the impact block 4 is driven to hit the welded joint of the steel structure, thereby removing the residual stress at the welded joint. There is no need for manual hammering by the staff. The operation is simple, time-saving and labor-saving, and effectively reduces the workload of the staff.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A heavy load box type steel structure welding residual stress releasing device comprising a rectangular plate (1), characterized in that, Symmetrically, mounting holes are arranged on the rectangular plate (1), and adsorption assemblies for adsorbing on the steel structure are arranged in the mounting holes. A moving hole is arranged on the moving seat (2), and an impact rod (3) is vertically and slidingly arranged in the moving hole. A U-shaped frame (7) is arranged on the moving seat (2) through a reciprocating assembly.

2. The heavy box type steel structure welding residual stress releasing device according to claim 1, characterized in that, The reciprocating assembly comprises a support plate (10) fixedly arranged on the moving seat (2), a reciprocating screw rod (11), a driving motor (12) fixedly arranged at one end of the support plate (10), and a lifting block (13) threadedly sleeved on the reciprocating screw rod (11).

3. The heavy box type steel structure welding residual stress releasing device according to claim 1, characterized in that, The support plate (10) is provided with a lifting hole, and the reciprocating screw rod (11) is rotatably arranged in the lifting hole.

4. The heavy box type steel structure welding residual stress releasing device according to claim 3, characterized in that, The reciprocating screw rod (11) is fixedly connected with the output shaft of the driving motor (12). The lifting block (13) is slidingly arranged in the lifting hole and is fixedly connected with the U-shaped frame (7). The separation assembly comprises two inclined plates (15) which are respectively and obliquely fixedly arranged on the two trapezoidal blocks (9) through connecting rods (14), a square block (16) arranged on the moving seat (2) through a supporting assembly, and a triangular block (17) fixedly arranged on the square block (16). The square block (16) and the triangular block (17) are located on the moving paths of the two inclined plates (15), and the two inclined plates (15) are in an inverted V shape. The supporting assembly comprises a first supporting column (18) and a second supporting column (19) fixedly arranged on the moving seat (2), a supporting rod (20) fixedly arranged on the second supporting column (19), and a limiting part for limiting the mutual movement of the first supporting column (18) and the second supporting column (19). The upper end of the first supporting column (18) is provided with a moving groove, and one end of the second supporting column (19) is slidingly inserted into the moving groove. The square block (16) is fixedly connected with the supporting rod (20).

5. The heavy box type steel structure welding residual stress releasing device according to claim 4, characterized in that, The first support column (18) is provided with a plurality of limiting holes (21) connected with the moving groove, the second support column (19) is provided with a insertion hole (22), the limiting part includes a second spring rod (23) fixedly installed on the first support column (18) and a limiting block (24) fixedly installed on one end of the second spring rod (23), one end of the limiting block (24) passes through one of the limiting holes (21) and is inserted into the insertion hole (22).

6. The heavy box type steel structure welding residual stress releasing device according to claim 1, characterized in that, Both sides of the strip-shaped hole are provided with a sliding groove, the sliding assembly includes two sliding blocks (25) slidingly installed in the two sliding grooves, and the two sliding blocks (25) are fixedly connected with the moving seat (2).

7. The heavy box type steel structure welding residual stress releasing device according to claim 1, characterized in that, The adsorption assembly includes an adsorption cylinder (26) fixedly installed in the mounting hole, a suction disc (27) fixedly installed on one end of the adsorption cylinder (26), a sealing plate (28) sealingly and slidingly installed in the adsorption cylinder (26) and a moving assembly for driving the sealing plate (28) to move, and the suction disc (27) is connected with the inside of the adsorption cylinder (26).

8. The heavy box type steel structure welding residual stress releasing device according to claim 7, characterized in that, The moving assembly includes a support (29) fixedly installed on one end of the adsorption cylinder (26) away from the suction disc (27), a threaded rod (30) and an adjusting block (31) fixedly installed on one end of the threaded rod (30), the support (29) is provided with a threaded hole, the threaded rod (30) is threadedly inserted into the threaded hole, and one end of the threaded rod (30) away from the adjusting block (31) is rotatably connected with the sealing plate (28).

9. The heavy box type steel structure welding residual stress releasing device according to claim 8, characterized in that, The moving seat (2) is fixedly installed with a pushing handle (32) on the side, the pushing handle (32) is fixedly installed with a cylinder (33), one end of the cylinder (33) close to the rectangular plate (1) is provided with a cylindrical groove, the moving column (35) is installed in the cylindrical groove through the return spring (34), one end of the moving column (35) away from the return spring (34) is provided with a spherical groove, the spherical groove is rollingly embedded with a ball (37), and the rectangular plate (1) is provided with a plurality of limiting grooves (36) on the upper surface, and the ball (37) is inserted into one of the limiting grooves (36).

10. The method of claim 9, wherein the method further comprises: providing a plurality of welding residual stress release devices; and positioning the plurality of welding residual stress release devices on the heavy box type steel structure. The steps are: The rectangular plate (1) is fixed at the steel structure by the adsorption assembly, the impact block (4) is aligned with the welding position, then the moving seat (2) is pushed to move horizontally along the welding position, in the moving process of the moving seat (2), the reciprocating assembly drives the two trapezoidal blocks (9) to reciprocate up and down through the U-shaped frame (7), and the impact rod (3) is continuously driven to reciprocate by cooperating with the separating assembly, under the elastic force of the extension spring (5), the impact block (4) is driven to impact the welding position of the steel structure, so that the residual stress of the welding position is removed.

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