Welding method for columnar shell

Abstract

The invention relates to the technical field of shell welding, in particular to a welding method for a columnar shell. The welding box is manufactured in advance, an operator is borne by the welding box, and when the operator stands in the welding box to weld the columnar shell, the welding box shields wind for the welding seam position; meanwhile, a moving rod capable of moving back and forth on the support is further arranged, the moving rod drives the walking wheel to move, the distance between the walking wheel and the first bearing can be adjusted, the walking wheel and the outer ring of the first bearing clamp the columnar shell, and after welding of one welding seam is completed, the walking wheel is driven by a motor to rotate, so that welding is completed. Through the friction force between the tire surfaces of the walking wheels and the inner wall of the columnar shell, the walking wheels can walk on the inner wall of the columnar shell in the circumferential direction, so that the welding basket is driven to move to the outer side of the next welding seam position on the outer wall of the columnar shell in the circumferential direction, the position of the welding box can be rapidly adjusted, and the construction efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of shell welding, in particular to a welding method for a columnar shell. Background Art

[0002] In the metallurgical construction industry, the shells of blast furnaces, hot blast furnaces, dry quenching furnaces, etc. are all columnar structures, which are often pressed into corresponding curved surfaces from large-area plates and then assembled and welded into shape. This type of equipment is difficult to transport by road due to its large structural size, so it cannot be manufactured in a factory. In the actual construction process, on-site production and field assembly and welding are often used for construction. When welding in the field, encountering a strong wind environment, pores are prone to form in the weld, affecting the welding quality. The traditional windproof method is to use a cover to cover the upwind. This method requires frequent movement of the cover as the welding position changes, which is cumbersome to operate and greatly reduces construction efficiency. At the same time, for environments with changeable wind directions, the traditional windproof method has poor windproof effect, resulting in the inability to effectively control the welding quality. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the traditional wind blocking method has the problems of complicated operation and low construction efficiency.

[0004] In order to solve the above problem, the present invention provides a columnar shell welding method of a windshield device capable of quickly adjusting the welding position, and the specific solution is: A welding method for a cylindrical shell comprises the following steps: Step 1: According to the construction requirements, the cylindrical shell is divided into multiple curved surfaces, and the curved surface plate is made according to the curved surface size and the thickness of the cylindrical shell; Step 2: splice multiple curved panels into a columnar shell at the construction site and temporarily fix them; Step 3, pre-fabricate a rectangular welding box, open the front side of the welding box, rotatably set first bearings on both sides of the top of the welding box, the first bearings are parallel to the axis of the columnar shell, a bracket is fixed at the front end of the top of the welding box, two parallel moving grooves are opened at both ends of the bottom of the bracket, threaded rods are rotatably set in the two moving grooves, vertical moving rods are respectively threadedly sleeved on the two threaded rods, a motor is fixed between the two moving rods, the bottom ends of the two moving rods are respectively rotatably connected to the rotating rods through the second bearings, the output shaft of the motor is connected to the rotating rod, a running wheel is fixedly sleeved at the bottom of the rotating rod, the running wheel is parallel to the axis of the columnar shell, and a lifting ear is fixed on the top of the welding box; Step 4: The operator enters the welding box and hoists the welding box to the outside of the curved plate at the weld position through the lifting lugs, so that the bracket between the running wheels and the welding box is placed on the top of the curved plate above the weld. At this time, the two running wheels are located on the inside of the curved plate; Step 5: Synchronously rotate the two threaded rods to drive the two moving rods to move toward the inner wall of the curved plate until the walking wheel abuts against the inner wall of the curved plate. At this time, the outer ring of the second bearing abuts against the outer wall of the curved plate, and the front end of the welding box is close to the outer wall of the curved plate to protect the welding position from wind. Step 6: Start welding the weld until the weld is completed; Step 7: Turn on the motor, and drive the travel wheel to rotate through the output shaft of the motor. The travel wheel moves circumferentially on the inner wall of the curved plate until it drives the welding box to move to the outer side of the curved plate at the next weld position, and welds the weld; Step 8. Repeat the steps in step 7 until all welds are completed.

[0005] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects: The present invention manufactures a welding box in advance, and the welding box carries the operator. When the operator stands in the welding box to weld the columnar shell, the welding box blocks the wind for the welding position. At the same time, a moving rod that can move forward and backward on the bracket is provided, and the moving rod drives the walking wheel to move, and the distance between the walking wheel and the first bearing can be adjusted so that the walking wheel and the outer ring of the first bearing clamp the columnar shell. When one weld is completed, the walking wheel is driven to rotate by a motor, and the friction between the tire surface of the walking wheel and the inner wall of the columnar shell makes the walking wheel move circumferentially on the inner wall of the columnar shell, thereby driving the welding basket to move circumferentially on the outer wall of the columnar shell to the outside of the next weld position, and then the position of the welding box can be quickly adjusted, thereby greatly improving the construction efficiency.

[0006] Preferably, a further technical solution of the present invention is: The output shaft of the motor is fixed with a first gear, and the two rotating rods are respectively fixed with second gears. The first gear and the two second gears are meshed and driven. When the motor is turned on, the first gear drives the two second gears to rotate. Through the above structure, it is convenient for the motor to drive the two rotating rods to rotate at the same time, thereby driving the two walking wheels to rotate at the same time.

[0007] The bottom front side of the welding box is also fixedly sleeved with a third bearing, and when the outer ring of the second bearing abuts against the outer wall of the curved plate, the outer ring of the third bearing abuts against the outer wall of the curved plate synchronously. By adding the third bearing, the stability of the welding box when it moves as a whole is increased.

[0008] The front end of the threaded rod protrudes from the bracket, and a knob is fixed on the threaded rod outside the bracket. In step 5, the threaded rod is driven to rotate by the knob. The threaded rod is driven to rotate by the knob, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1is a schematic diagram of the welding state of an embodiment of the present application; Figure 2 It is a structural stereogram in step three of the embodiment of the present application; Figure 3 It is another perspective structural stereogram in step three of the embodiment of the present application; Figure 4 It is a side view of the structure in step three of the embodiment of the present application; In the figure: 1. cylindrical shell; 2. bracket; 21. movable groove; 211. knob; 22. threaded rod; 23. movable rod; 231. fixed plate; 24. second bearing; 25. rotating rod; 26. second gear; 27. walking wheel; 28. motor; 29. ​​first gear; 3. welding box; 31. lifting ear; 32. first fixed rod; 33. first bearing; 34. second fixed rod; 35. third bearing. DETAILED DESCRIPTION

[0010] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0011] See attached Figure 1-4 The embodiment of the present invention discloses a welding method of a columnar shell, comprising the following steps: Step 1: According to the construction requirements, the columnar shell 1 is divided into multiple curved surfaces, and a curved surface plate is manufactured according to the curved surface size and the thickness of the columnar shell 1; Step 2: At the construction site, multiple curved panels are assembled into a columnar shell 1 and temporarily fixed; Step 3: pre-fabricate a rectangular welding box 3, open the front side of the welding box 3, and close the other sides of the welding box 3. A vertical first fixing rod 32 is fixed at both ends of the top of the welding box 3. A first bearing 33 is fixedly sleeved at the lower end of the first fixing rod 32. The first bearing 33 is parallel to the axial direction of the columnar shell 1. Specifically, the inner ring of the first bearing 33 is fixedly sleeved at the lower end of the first fixing rod 32. The bracket 2 is fixed at the front end of the top of the welding box 3. Two parallel moving grooves 21 are opened at both ends of the bottom of the bracket 2. The two moving grooves 21, a threaded rod 22 is rotatably arranged, so that the rear end of the threaded rod 22 is rotatably connected with the rear end of the moving groove 21, and vertical moving rods 23 are respectively threadedly sleeved on the two threaded rods 22, and a motor 28 is fixed between the two moving rods 23. The lower ends of the two moving rods 23 are rotatably connected with a rotating rod 25 through a second bearing 24, and the output shaft of the motor 28 is connected to the rotating rod 25 in a transmission manner. Travel wheels 27 are fixedly sleeved at the bottom of the two rotating rods 25, and the travel wheels 27 are axially parallel to the columnar shell 1, and a lifting lug 31 is fixed on the top of the welding box 3; Step 4: The operator enters the welding box 3 and hoists the welding box 3 to the outside of the curved plate at the weld position through the lifting lugs 31, so that the bracket 2 between the running wheels 27 and the welding box 3 is placed on the top of the curved plate above the weld. At this time, the two running wheels 27 are located on the inside of the curved plate; Step 5: Synchronously rotate the two threaded rods 22 to drive the two moving rods 23 to move toward the inner wall of the curved plate until the walking wheel 27 abuts against the inner wall of the curved plate. At this time, the outer ring of the second bearing 24 abuts against the outer wall of the curved plate, and the front end of the welding box 3 is close to the outer wall of the curved plate to protect the welding position from wind. Step 6: Start welding the weld until the weld is completed; Step 7, turn on the motor 28, and drive the travel wheel 27 to rotate through the output shaft of the motor 28, and the travel wheel 27 moves circumferentially on the inner wall of the curved plate until it drives the welding box 3 to move to the outer side of the curved plate at the next welding seam position, and welds the weld seam; Step 8. Repeat the steps in step 7 until all welds are completed.

[0012] In this embodiment, the lower end of the moving rod 23 is coaxially fixed with the outer ring of the second bearing 24 , and the inner ring of the second bearing 24 is fixedly sleeved on the top end of the rotating rod 25 .

[0013] In this embodiment, a fixing plate is fixedly connected between the two moving rods 23, a motor 28 is fixed at the bottom of the fixing plate, a first gear 29 is fixedly sleeved on the output shaft of the motor 28, and second gears 26 are fixedly sleeved on the two rotating rods 25, respectively, and the first gear 29 and the two second gears 26 are meshed and transmitted; preferably, a protruding block is fixed at the front end of the fixing plate, and the motor 28 is fixed at the bottom of the protruding block, so that the motor 28 is located in the middle of the front of the two moving rods 23, and the diameter of the first gear 29 is larger than the diameter of the two second gears 26. Through the above structure, it is convenient for the motor 28 to drive the two rotating rods 25 to rotate at the same time, thereby driving the two walking wheels 27 to rotate at the same time.

[0014] In this embodiment, the bottom front side of the welding box 3 is also fixedly sleeved with a third bearing 35. Specifically, the two ends of the front bottom of the welding box 3 are also fixed with a second fixing rod 34. The inner ring of the third bearing 35 is fixedly sleeved on the lower end of the second fixing rod 34. The outer ring of the third bearing 35 is used to abut the outer wall of the columnar shell 1. The front outer walls of the second bearing 24 and the third bearing 35 are on the same vertical plane, and the distance between the front outer walls of the second bearing 24 and the third bearing 35 and the front side of the welding box 3 is not greater than 200 mm. When the outer ring of the second bearing 24 abuts against the outer wall of the columnar shell 1, the outer ring of the third bearing 35 abuts against the outer wall of the columnar shell 1 synchronously. At this time, the distance between the front side of the welding box 3 and the outer wall of the columnar shell 1 is not greater than 200 mm, so that the welding box 3 can effectively block the wind for the welding position. By adding the third bearing 35, the stability of the welding box 3 when it moves as a whole is increased.

[0015] In this embodiment, the front end of the threaded rod 22 protrudes from the bracket 2, and a knob is fixed on the threaded rod 22 outside the bracket 2. In step 5, the threaded rod 22 is driven to rotate by the knob. The threaded rod 22 is driven to rotate by the knob, which is convenient for operation.

[0016] The present invention prefabricates a welding box 3, and carries an operator through the welding box 3. When the operator stands in the welding box 3 to weld the columnar shell 1, the welding box 3 shields the weld position from wind. At the same time, a moving rod 23 that can move back and forth on the bracket 2 is also provided. The moving rod 23 drives the walking wheel 27 to move, and the distance between the walking wheel 27 and the first bearing 33 can be adjusted, so that the outer ring of the walking wheel 27 and the first bearing 33 clamps the columnar shell 1. When one weld is completed, the walking wheel 27 is driven to rotate by the motor 28. The friction between the tire surface of the walking wheel 27 and the inner wall of the columnar shell 1 enables the walking wheel 27 to move circumferentially on the inner wall of the columnar shell 1, thereby driving the welding basket to move circumferentially on the outer wall of the columnar shell 1 to the outside of the next weld position, and then the position of the welding box 3 can be quickly adjusted, greatly improving the wind protection and construction efficiency.

[0017] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A welding method for a cylindrical shell, characterized in that: The following steps are involved: Step 1: According to the construction requirements, the cylindrical shell is divided into multiple curved surfaces, and the curved surface plate is made according to the curved surface size and the thickness of the cylindrical shell; Step 2: splice multiple curved panels into a columnar shell at the construction site and temporarily fix them; Step 3, pre-fabricate a rectangular welding box, open the front side of the welding box, rotatably set first bearings on both sides of the top of the welding box, the first bearings are parallel to the axis of the columnar shell, a bracket is fixed at the front end of the top of the welding box, two parallel moving grooves are opened at both ends of the bottom of the bracket, threaded rods are rotatably set in the two moving grooves, vertical moving rods are respectively threadedly sleeved on the two threaded rods, a motor is fixed between the two moving rods, the bottom ends of the two moving rods are respectively rotatably connected to the rotating rods through the second bearings, the output shaft of the motor is connected to the rotating rod, a travel wheel is fixedly sleeved at the bottom of the rotating rod, the travel wheel is parallel to the axis of the columnar shell, and a lifting ear is fixed on the top of the welding box; Step 4: The operator enters the welding box and hoists the welding box to the outside of the curved plate at the weld position through the lifting lugs, so that the bracket between the running wheels and the welding box is placed on the top of the curved plate above the weld. At this time, the two running wheels are located on the inside of the curved plate; Step 5: Synchronously rotate the two threaded rods to drive the two moving rods to move toward the inner wall of the curved plate until the walking wheel abuts against the inner wall of the curved plate. At this time, the outer ring of the second bearing abuts against the outer wall of the curved plate, and the front end of the welding box is close to the outer wall of the curved plate to protect the welding position from wind. Step 6: Start welding the weld until the weld is completed; Step 7: Turn on the motor, and drive the travel wheel to rotate through the output shaft of the motor. The travel wheel moves circumferentially on the inner wall of the curved plate until it drives the welding box to move to the outer side of the curved plate at the next weld position, and welds the weld; Step 8. Repeat the steps in step 7 until all welds are completed.

2. The welding method of a columnar shell according to claim 1, characterized in that: A first gear is fixedly sleeved on the output shaft of the motor, and second gears are fixedly sleeved on the two rotating rods respectively. The first gear and the two second gears are meshed for transmission. When the motor is turned on, the two second gears are driven to rotate through the first gear.

3. The welding method of a columnar housing according to claim 1, characterized in that: The bottom front side of the welding box is also fixedly sleeved with a third bearing. When the outer ring of the second bearing abuts against the outer wall of the curved plate, the outer ring of the third bearing abuts against the outer wall of the curved plate simultaneously.

4. The welding method of a columnar shell according to claim 1, characterized in that: The front end of the threaded rod protrudes from the bracket, and a knob is fixed on the threaded rod outside the bracket. In step five, the threaded rod is driven to rotate by the knob.

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