Large-diameter pressure pipeline butt welding equipment

Abstract

The invention relates to the field of welding equipment, and discloses large-diameter pressure pipeline butt welding equipment which comprises a base, two sets of supporting columns are installed at the top of the base, fixing cylinders are fixedly installed at the tops of the supporting columns, and a welding mechanism is rotationally installed at the tops of the two sets of fixing cylinders; two first telescopic rods are movably hinged to one side of the inner wall of the fixing cylinder. According to the device, three sets of pressing columns and rolling wheels located in a fixing cylinder are horizontally pushed by second telescopic rods and sliding columns to rotate, the outer surfaces of the rolling wheels abut against the outer surfaces of workpieces in a rolling mode, clamping and supporting are conducted at the same time, and after the two sets of workpieces abut against each other, first telescopic rods are used for driving adaptive plates to wrap and abut against the outer surfaces of the workpieces; and the adaptive plate and the workpieces are in large-area contact, butt joint and pressure application, so that only horizontal thrust is generated at the butt joint of the two groups of workpieces, the stress at the butt joint is eliminated, and the welding quality of the device is improved.

Description

Technical Field

[0001] This application relates to the field of welding equipment technology, and in particular to a welding equipment for butt welding of large-diameter pressure pipelines. Background Technology

[0002] Large-diameter pressure pipelines require butt welding before welding to ensure a smooth, abutting, and sealed weld joint between the two sets of pressure pipelines (facilitating the effective use of the welding shielding gas). Currently, metal welding equipment, including automatic and semi-automatic electric arc welding machines and plasma arc welding machines, can be used for welding large-diameter pressure pipelines. However, when dealing with tubular large-diameter pressure pipelines, it is crucial to maintain the butt welding quality between the two sets of pipelines to be welded. Existing butt welding equipment includes external clamping (clamping the pipeline from the outside for support and butt welding) and internal support (i.e., setting a support structure on the inner wall of the pipeline to maintain support and clamping, as in the patent CN202410946310.6). The internal support structure can reduce the support and clamping structure on the outer wall of the pipeline. There are two methods (external clamping and internal support) to reduce the impact on subsequent welding. However, the external clamping method requires clamping and fixing the two sets of pipes to be welded together separately. This clamping often uses a fixed arc plate to fit the outer wall of the pipe and achieve a high contact area, but it limits the device to only fits pipes of a single size and lacks applicability. The internal support method brings another problem. It uses a hydraulic rod to retract and drive two sets of internal support structures to connect the two sets of pipes from the inside. Due to the lack of external support, this internal support welding equipment applies all the pressure of fixing the two sets of pipes to the inside of the pipes, causing uneven internal stress inside the two sets of pipes, especially at the bottom of the joint, which may affect the quality of subsequent welding. Therefore, it is urgent to solve this problem. Summary of the Invention

[0003] This application proposes a welding device for large-diameter pressure pipelines, which has the advantages of stable support and good welding effect, and solves the problem in the prior art that the welding quality is affected by stress at the welding part due to poor support.

[0004] To achieve the above objectives, this application adopts the following technical solution: a large-diameter pressure pipeline butt welding equipment, including a base, two sets of support columns are installed on the top of the base, a fixed cylinder is fixedly installed on the top of the support columns, and a welding mechanism is rotatably installed on the top of the two sets of fixed cylinders. Two sets of telescopic rods are movably hinged to one side of the inner wall of the fixed cylinder. The telescopic end of the telescopic rod is movably hinged to an adapter plate. Multiple sets of pressure columns are movably hinged to one side of the inner wall of the fixed cylinder. A roller is fixedly connected to one end of each pressure column, and a slot is formed in the middle of each pressure column. Multiple sets of telescopic rods are fixedly installed on the other side of the inner wall of the fixed cylinder. A connecting plate is fixedly installed at the telescopic end of each telescopic rod. Each set of connecting plates is fixedly connected to a sliding column, which passes through the inner wall of the slot.

[0005] Preferably, the welding mechanism includes a support ring fixedly installed at the opposite ends of two sets of fixed cylinders. A mounting seat is movably sleeved on the outer surface of the support ring. A telescopic rod three is installed inside the mounting seat. A welding gun is installed at the telescopic end of the telescopic rod three. A motor is installed at the top of the right fixed cylinder. A protective cover is installed on the outside of the motor. A gear two is installed on the output shaft of the motor. A gear one is fixedly installed on the right side of the mounting seat. The gear two meshes with the gear one.

[0006] Preferably, both sets of fixed cylinders are horizontally placed and coaxially distributed, and workpieces are disposed inside the fixed cylinders, with the opposite ends of the two sets of workpieces abutting each other.

[0007] Preferably, the two sets of telescopic rods are symmetrically distributed on the inner wall of the fixed cylinder, and the telescopic ends of the telescopic rods are fixedly installed with connecting cylinders. Both ends of the adapter plate are movably connected to the two sets of connecting cylinders.

[0008] Preferably, the adapter plate is made of stainless steel, and the top of the adapter plate is open and fits against the outer surface of the workpiece.

[0009] Preferably, the axis of the slot forms a 20° angle with the axis of the fixed cylinder, and the outer surface of the roller rolls against the outer surface of the workpiece.

[0010] Preferably, there are three sets of connecting plates and sliding columns, and the three sets of connecting plates and three sets of sliding columns are distributed alternately.

[0011] Preferably, the hinge point between the pressure column and the inner wall of the fixed cylinder is close to the joint of the two sets of workpieces, and the roller is far away from the joint of the two sets of workpieces.

[0012] Preferably, the pressure of the roller on the workpiece is F1, which can be divided into a horizontal thrust towards the joint of the two sets of workpieces and a radial thrust perpendicular to the axis of the workpiece.

[0013] Preferably, the sliding column can move horizontally along the inner wall of the slot under the drive of the telescopic rod and the sliding column, and is used to control the synchronous opening and closing of multiple sets of pressure columns.

[0014] The beneficial effects of this invention are as follows: 1. This device has been redesigned to achieve full contact and full support clamping of the workpiece. This significantly increases the contact area between the clamping components and the workpiece, reducing stress at the workpiece joint. The device uses a base and fixed cylinders for support, and features two sets of horizontally coaxially distributed fixed cylinders for placing the workpiece. When the workpiece enters the fixed cylinder, three sets of pressure columns and rollers located inside the cylinder rotate under the horizontal push of the telescopic rod and sliding column, causing the outer surfaces of the rollers to roll and abut against the outer surface of the workpiece, simultaneously clamping and supporting it. After the two sets of workpieces abut against each other, the telescopic rod drives the adapter plate to wrap around and abut against the outer surface of the workpiece, allowing the adapter plate to make large-area contact, abutment, and pressure application. This ensures that only horizontal thrust is generated at the joint of the two sets of workpieces, eliminating stress at the joint and improving the welding quality of the device.

[0015] 2. Then, the workpiece is reinforced and strengthened by using a pressure column that can rotate around its hinge point and a roller. The pressure column and roller in this device can open and close freely under the horizontal push of the sliding column and are suitable for workpieces of different diameters. When the two sets of workpieces come into contact with each other at the predetermined welding position, the pressure column can drive the roller to rotate and generate pressure F1 on the surface of the workpiece. The horizontal component of F1 towards the welding component side continues to act on the workpiece, so that the joint of the two sets of workpieces fits better.

[0016] 3. Finally, this device features a horizontally positioned slot on the front of the pressure column, allowing the sliding column to be vertically inserted and move horizontally. Driven by the telescopic rod and the connecting plate, the sliding column slides relative to the slot, thereby causing multiple pressure columns to rotate synchronously at the same angle. This design ensures that the multiple rollers produce the same stroke, enabling the workpiece to be clamped and supported while aligning the workpiece's axis with the axis of the fixed cylinder. This allows the device to adapt synchronously to workpieces of different diameters, making it highly versatile. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles of this application in a clear and understandable manner.

[0018] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein: Figure 1 This is a front view diagram of the overall structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 This is a front sectional view of the overall structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the internal structure of the fixing cylinder of the present invention; Figure 6 This is a schematic diagram showing the separation of the welding mechanism of the present invention; Figure 7 This is a schematic diagram of the fixed cylinder, telescopic rod 1, adapter plate and the side of the workpiece of the present invention; Figure 8 This is a schematic diagram showing the separation of the fixed cylinder, telescopic rod one, adapter plate, telescopic rod two, connecting plate, sliding column, pressure column, roller and connecting cylinder of the present invention.

[0019] The components are as follows: 1. Base; 2. Support column; 3. Fixing cylinder; 31. Telescopic rod one; 32. Adapter plate; 33. Telescopic rod two; 34. Connecting plate; 35. Sliding column; 36. Pressure column; 37. Roller; 38. Slot; 39. Connecting cylinder; 4. Support ring; 5. Mounting seat; 6. Telescopic rod three; 7. Welding torch; 8. Gear one; 9. Motor; 10. Protective cover; 11. Workpiece; 12. Gear two. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] Please see Figures 1-8 This embodiment discloses a large-diameter pressure pipeline butt welding equipment, including a base 1, two sets of support columns 2 are installed on the top of the base 1, a fixed cylinder 3 is fixedly installed on the top of the support columns 2, and a welding mechanism is rotatably installed on the top of the two sets of fixed cylinders 3. Two sets of telescopic rods 31 are movably hinged to one side of the inner wall of the fixed cylinder 3. The telescopic ends of the telescopic rods 31 are movably hinged to an adapter plate 32. Multiple sets of pressure columns 36 are movably hinged to one side of the inner wall of the fixed cylinder 3. A roller 37 is fixedly connected to one end of the pressure column 36. A slot 38 is opened in the middle of the pressure column 36. Multiple sets of telescopic rods 33 are fixedly installed on the other side of the inner wall of the fixed cylinder 3. A connecting plate 34 is fixedly installed at the telescopic end of the telescopic rods 33. A sliding column 35 is fixedly connected between adjacent sets of connecting plates 34. The sliding column 35 passes through the inner wall of the slot 38. This device has been redesigned to achieve full contact and full support clamping of workpiece 11. This significantly increases the contact area between the clamping components and workpiece 11, reducing stress at the joint. The device uses a base 1 and a fixed cylinder 3 for support, and two sets of horizontally coaxially distributed fixed cylinders 3 are designed to hold workpiece 11. When workpiece 11 enters the fixed cylinder 3, three sets of pressure columns 36 and rollers 37 located inside the fixed cylinder 3 rotate under the horizontal push of the telescopic rod 33 and sliding column 35, causing the outer surface of the rollers 37 to roll and abut against the outer surface of workpiece 11, simultaneously clamping and supporting it. After the two sets of workpiece 11 abut against each other, the telescopic rod 31 drives the adapter plate 32 to wrap around and abut against the outer surface of workpiece 11, allowing the adapter plate 32 to make large-area contact, abut, and apply pressure to the workpiece 11. This ensures that only horizontal thrust is generated at the joint of the two sets of workpiece 11, thereby eliminating stress at the joint and improving the welding quality of the device.

[0022] Then, the workpiece 11 is reinforced and consolidated by the pressure column 36, which can rotate around its own hinge, in conjunction with the roller 37. The pressure column 36 and roller 37 in this device can open and close freely under the horizontal push of the sliding column 35 and are adapted to workpieces 11 of different diameters. When the two sets of workpieces 11 come into contact with each other to the predetermined welding position, the pressure column 36 drives the roller 37 to rotate and generate pressure F1 on the surface of the workpiece 11. The horizontal component of F1 toward the welding assembly side continues to act on the workpiece 11, so that the joint of the two sets of workpieces 11 fits better.

[0023] Finally, this device features a horizontally positioned slot 38 on the front of the pressure column 36, allowing the sliding column 35 to be vertically inserted and move horizontally. Driven by the telescopic rod 33 and the connecting plate 34, the sliding column 35 slides relative to the slot 38, thereby driving multiple sets of pressure columns 36 to rotate synchronously at the same angle. This design enables multiple sets of rollers 37 to have the same stroke, which means that while clamping and supporting the workpiece 11, it also aligns the axis of the workpiece 11 with the axis of the fixed cylinder 3. This allows the device to adapt synchronously to workpieces 11 of different diameters, making it highly adaptable.

[0024] The welding mechanism includes a support ring 4 fixedly installed at opposite ends of two sets of fixed cylinders 3. A mounting seat 5 is movably sleeved on the outer surface of the support ring 4. A telescopic rod 6 is installed inside the mounting seat 5. A welding gun 7 is installed at the telescopic end of the telescopic rod 6. A motor 9 is installed on the top of the right fixed cylinder 3. A protective cover 10 is installed on the outside of the motor 9. A gear 12 is installed on the output shaft of the motor 9. A gear 8 is fixedly installed on the right side of the mounting seat 5. The gear 12 meshes with the gear 8. The welding assembly is slidably mounted on the outer surface of the support ring 4 and can rotate so that the welding torch 7 can cover the entire joint of the two sets of workpieces 11. Then, the telescopic rod 6 can drive the welding torch 7 to the welding position at the joint and adapt to workpieces 11 of different diameters. The motor 9 drives the gear 12 to rotate the gear 8, thereby driving the mounting base 5 to rotate as a whole.

[0025] The two sets of fixed cylinders 3 are horizontally placed and coaxially distributed. The workpieces 11 are arranged inside the fixed cylinders 3, and the opposite ends of the two sets of workpieces 11 abut against each other. The two sets of fixed cylinders 3 are used to support the two sets of workpieces 11 respectively, and to assist the two sets of workpieces 11 in docking and fixing.

[0026] Among them, two sets of telescopic rods 31 are symmetrically distributed on the inner wall of the fixed cylinder 3. The telescopic ends of the telescopic rods 31 are fixedly installed with connecting cylinders 39, and both ends of the adapter plate 32 are movably connected to the two sets of connecting cylinders 39. The telescopic rod 31 extends and drives the adapter plate 32 to wrap around the outer surface of the workpiece 11, so that the adapter plate 32 completely fits the outer surface of the workpiece 11 and realizes the full support function of the workpiece 11, increasing the contact area and improving the stability of the workpiece 11.

[0027] The adapter plate 32 is made of stainless steel, and the top of the adapter plate 32 is open and fits and abuts against the outer surface of the workpiece 11. The adapter plate 32 is made of stainless steel, which has excellent mechanical properties and can achieve a large degree of bending deformation.

[0028] The axis of the slot 38 forms a 20° angle with the axis of the fixed cylinder 3, and the outer surface of the roller 37 rolls against the outer surface of the workpiece 11. like Figure 3 As shown, the angle between the pressure column 36 and the axis of the fixed cylinder 3 allows the pressure from the roller 37 to be divided into horizontal thrust and directed toward the welding mechanism, increasing the pressure of the workpiece 11 during the welding process.

[0029] Among them, there are three sets of connecting plates 34 and three sets of sliding columns 35, and the three sets of connecting plates 34 and three sets of sliding columns 35 are distributed in an alternating manner. The connecting plate 34 and the sliding column 35 are fixedly connected adjacently, thus fitting into the three sets of slots 38 and simultaneously pushing the three sets of pressure columns 36 to rotate.

[0030] Among them, the hinge of the pressure column 36 and the inner wall of the fixed cylinder 3 is close to the docking point of the two sets of workpieces 11, and the roller 37 is far away from the docking point of the two sets of workpieces 11. like Figure 3As shown, the positions and angles of the pressure column 36 and the roller 37 are designed to ensure that the roller 37 can apply pressure to the workpiece 11 to generate a pressure F1 that tilts towards the welding mechanism.

[0031] Among them, the pressure of the roller 37 on the workpiece 11 is F1, which can be divided into a horizontal thrust towards the joint of the two sets of workpieces 11 and a radial thrust perpendicular to the axis of the workpiece 11. like Figure 3 As shown, the radial thrust generated by F1 will abut against each other between the three sets of rollers 37, while the horizontal thrust of F1 can act on the side facing the welding mechanism, and the horizontal thrust generated by the left and right F1 can cancel each other out.

[0032] Among them, the sliding column 35 can move horizontally along the inner wall of the slot 38 under the drive of the telescopic rod 33 and the sliding column 35, and is used to control the synchronous opening and closing of multiple sets of pressure columns 36; When the sliding column 35 moves horizontally, it is locked inside the slot 38, so the pressure column 36 will also be driven to rotate to control the opening and closing of the pressure column 36 and the roller 37.

[0033] Working principle: When this device is in operation, the telescopic rod 33 is activated, which drives the connecting plate 34 and the sliding column 35 to move away from the welding mechanism and drives multiple sets of pressure columns 36 to rotate. The rollers 37 are opened, and then the workpiece 11 is transported into the interior of the fixed cylinder 3 using hoisting equipment. When one end of the workpiece 11 enters the interior of the fixed cylinder 3, the workpiece 11 abuts against the surface of the adapter plate 32 and obtains support. Then, the telescopic rod 33 is activated, which drives the connecting plate 34 and the sliding column 35 to move closer to the welding mechanism, thereby driving multiple sets of pressure columns 36 to rotate, which in turn causes the rollers 37 to abut against the outer surface of the workpiece 11 and apply pressure to the workpiece 11. Then, as Figure 3 As shown, the two sets of workpieces 11 have moved to the predetermined position and their mating ends are abutting. The pressure column 36 drives the roller 37 to make a circular motion around its hinge end, that is, F1 acts on the outer surface of the workpiece 11. At this time, the radial thrust of F1 perpendicular to the axis of the workpiece 11 is used to clamp and support the workpiece 11. The horizontal thrust of F1 is directed towards one side of the welding mechanism, which can apply pressure to the two sets of workpieces 11. The horizontal thrust of the two sets of F1 is equal in magnitude and opposite in direction, which cancels out. The horizontal thrust of the two sets of workpieces 11 can act on the mating point of the two. Finally, activate telescopic rod 31 and extend it outwards, as shown. Figure 2As shown, the adapter plate 32 is driven by the telescopic rod 31 and surrounds the outer surface of the workpiece 11, while providing support. Finally, the adapter plate 32 completely fits the outer surface of the workpiece 11, completing the clamping of the workpiece 11. The motor 9 is started, and the mounting base 5 is moved as a whole through the gear 12 and gear 8, so that the welding torch 7 can make a circular motion around the joint of the workpiece 11, covering the joint of the workpiece 11. At the same time, the telescopic rod 6 is started and drives the welding torch 7 to move, so that the welding torch 7 can be adapted to workpieces 11 of different diameters. Then the welding torch 7 is turned on to weld the joint of the workpiece 11.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A large-diameter pressure pipeline butt welding device, comprising a base (1), wherein two sets of support columns (2) are mounted on the top of the base (1), characterized in that, The top of the support column (2) is fixedly installed with a fixing cylinder (3), and the top of the two sets of fixing cylinders (3) are rotatably installed with welding mechanisms. Two sets of telescopic rods (31) are movably hinged to one side of the inner wall of the fixed cylinder (3). An adapter plate (32) is movably hinged to the telescopic end of the telescopic rod (31). Multiple sets of pressure columns (36) are movably hinged to one side of the inner wall of the fixed cylinder (3). A roller (37) is fixedly connected to one end of the pressure column (36). A slot (38) is opened in the middle of the pressure column (36). Multiple sets of telescopic rods (33) are fixedly installed on the other side of the inner wall of the fixed cylinder (3). A connecting plate (34) is fixedly installed at the telescopic end of the telescopic rod (33). A sliding column (35) is fixedly connected between adjacent sets of the connecting plates (34). The sliding column (35) passes through the inner wall of the slot (38).

2. The large-diameter pressure pipeline butt welding equipment according to claim 1, characterized in that, The welding mechanism includes a support ring (4) fixedly installed at opposite ends of two sets of fixed cylinders (3). A mounting seat (5) is movably sleeved on the outer surface of the support ring (4). A telescopic rod three (6) is installed inside the mounting seat (5). A welding gun (7) is installed at the telescopic end of the telescopic rod three (6). A motor (9) is installed on the top of the fixed cylinder (3) on the right side. A protective cover (10) is installed on the outside of the motor (9). A gear two (12) is installed on the output shaft of the motor (9). A gear one (8) is fixedly installed on the right side of the mounting seat (5). The gear two (12) meshes with the gear one (8).

3. The large-diameter pressure pipeline butt welding equipment according to claim 2, characterized in that, Both sets of fixed cylinders (3) are horizontally placed and distributed coaxially. The workpieces (11) are arranged inside the fixed cylinders (3), and the opposite ends of the two sets of workpieces (11) abut against each other.

4. The large-diameter pressure pipeline butt welding equipment according to claim 3, characterized in that, The two sets of telescopic rods (31) are symmetrically distributed on the inner wall of the fixed cylinder (3). The telescopic ends of the telescopic rods (31) are fixedly installed with connecting cylinders (39). Both ends of the adapter plate (32) are movably connected to the two sets of connecting cylinders (39).

5. The large-diameter pressure pipeline butt welding equipment according to claim 4, characterized in that, The adapter plate (32) is made of stainless steel, and the top of the adapter plate (32) is open and fits against the outer surface of the workpiece (11).

6. The large-diameter pressure pipeline butt welding equipment according to claim 5, characterized in that, The axis of the slot (38) forms a 20° angle with the axis of the fixed cylinder (3), and the outer surface of the roller (37) rolls against the outer surface of the workpiece (11).

7. The large-diameter pressure pipeline butt welding equipment according to claim 6, characterized in that, The number of connecting plates (34) and sliding columns (35) are three sets, and the three sets of connecting plates (34) and sliding columns (35) are distributed in an alternating manner.

8. The large-diameter pressure pipeline butt welding equipment according to claim 7, characterized in that, The hinge of the pressure column (36) and the inner wall of the fixed cylinder (3) is close to the joint of the two sets of workpieces (11), and the roller (37) is far away from the joint of the two sets of workpieces (11).

9. The large-diameter pressure pipeline butt welding equipment according to claim 8, characterized in that, The pressure of the roller (37) on the workpiece (11) is F1, which can be divided into a horizontal thrust that is horizontal towards the joint of the two sets of workpieces (11) and a radial thrust that is perpendicular to the axis of the workpiece (11).

10. The large-diameter pressure pipeline butt welding equipment according to claim 9, characterized in that, The sliding column (35) can move horizontally along the inner wall of the slot (38) under the drive of the telescopic rod (33) and the sliding column (35), and is used to control the synchronous opening and closing of multiple sets of pressure columns (36).

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