A top pressure welding device and method for automatic welding of large-diameter cylinder and flange

Abstract

The present application relates to automatic welding equipment technical field, especially a kind of top pressure welding device and method for large diameter cylinder and flange automatic welding.In the basis of welding by submerged arc automatic welding trolley cooperation roller tire frame, lateral support and welding platform are additionally provided, and the top and bottom of flange are respectively supported by top pressure protection device and roller device, which can effectively prevent the center of gravity from deviating and tilting when large diameter cylinder and flange are submerged arc welded;Through electric telescopic mechanism and electric sliding mechanism, cooperate with the pressure sensor arranged on the roller and roller, the center of gravity of cylinder and flange can be automatically adjusted according to the center of gravity deviation and the tendency of toppling;Welding platform is hinged on lateral support and can be retracted, which is convenient for hoisting and placing large diameter cylinder;The longitudinal height of roller base and the adjustment of roller base are adjustable, which can adapt to different sizes of cylinder welding, and the operation is convenient and high in applicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic welding equipment, in particular to a top pressure welding device and method for automatic welding of large-diameter cylinder and flange. BACKGROUND

[0002] In the fields of mine, tunnel construction, power station boiler, electric power and the like, there are many welding of heavy, thick and large-diameter cylinders and tanks. Since the diameter of the cylinder is large, a welding platform needs to be erected and a corresponding tooling is needed to realize automatic welding. The conventional submerged arc welding machine is limited by the welding station and is not easy to perform the welding of the cylinder ring joint. Meanwhile, for the asymmetric structure with flange at the end, the conventional roller tire frame welding tooling is also difficult to apply due to the difficulty in controlling the center of gravity.

[0003] When the existing technology is used to weld the large-diameter cylinder with a diameter of 800 mm or more, a submerged arc automatic welding trolley is often used in combination with a roller tire frame to perform the welding of the ring joint. This method can adapt to the welding of cylinders with different diameters and weights according to the size and load capacity of the roller tire frame. Alternatively, a robot welding technology is used to perform automatic and precise welding.

[0004] The above existing technology has the following disadvantages:

[0005] 1) The submerged arc automatic welding trolley in combination with the roller tire frame cannot guarantee safe use for the cylinder with asymmetric end and difficult-to-control center of gravity, especially for the butt welding between the cylinder and the flange.

[0006] 2) The intelligent robot welding equipment occupies a large site and has high construction and maintenance costs. Precise assembly and processing are required, and the welding efficiency is not as good as that of the submerged arc welding. Moreover, the welding cost is high, which is not conducive to large-scale promotion and use. SUMMARY

[0007] The technical problem to be solved by the present application is to provide a top pressure welding device and method for automatic welding of large-diameter cylinder and flange, which can effectively prevent the center of gravity from deviating and tilting during the submerged arc welding of the large-diameter cylinder and flange, and ensure the quality and safety of the welding.

[0008] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0009] A top pressure welding device for automatic welding of large-diameter cylinder and flange is used for submerged arc welding of a to-be-welded cylinder and flange 2, which comprises a bottom plate 10, a lateral support 1, a roller tire frame 4 and a roller device 5 are arranged on the bottom plate 10, a top pressure protection device 3, a welding platform 8 and a ladder 9 are installed on the lateral support 1, and a submerged arc automatic welding trolley is installed on the welding platform 8.

[0010] When the submerged arc automatic welding trolley welds the to-be-welded cylinder and the flange 2, the roller tire frame 4 drives the to-be-welded cylinder and the flange 2 to rotate, and the top pressing protection device 3 and the supporting roller device 5 roll and support the top and bottom of the flange respectively.

[0011] Further, the lateral support 1 is fixed to the bottom plate 10, and the lateral support 1 is located at the end face of the to-be-welded cylinder and the flange 2, and the inclined strut 6 is arranged between the lateral support 1 and the bottom plate 10.

[0012] Further, the welding platform 8 is hinged to the upper part of the lateral support 1, and the inclined cable 7 is arranged between the welding platform 8 and the lateral support 1.

[0013] Further, the top pressing protection device 3 is provided with two, each top pressing protection device 3 is composed of a roller 3-1, a roller mounting seat 3-2 and a roller base 3-3, two roller bases 3-3 are symmetrically arranged on the two sides of the lateral support 1, the roller mounting seat 3-2 is arranged on the roller base 3-3, the roller 3-1 is installed on the roller mounting seat 3-2, and the two rollers 3-1 are in contact with the end face of the flange.

[0014] Further, the supporting roller device 5 is provided with two, each supporting roller device 5 is composed of a supporting roller 5-1, a supporting roller mounting seat 5-2 and a supporting roller base 5-3, two supporting roller bases 5-3 are symmetrically arranged on the bottom plate 10, the supporting roller mounting seat 5-2 is arranged on the supporting roller base 5-3, the supporting roller 5-1 is installed on the supporting roller mounting seat 5-2, and the two supporting rollers 5-1 are in contact with the bottom of the flange.

[0015] Further, the ladder 9 is fixed to one side of the lateral support 1.

[0016] Further, the two roller bases 3-3 can move longitudinally along the lateral support 1 to adjust the height, the roller mounting seat 3-2 is provided with an electric sliding mechanism and can move horizontally along the roller base 3-3, and the roller 3-1 is provided with a transverse pressure sensor.

[0017] Further, the two supporting roller bases 5-3 can move horizontally along the bottom plate 10 to adjust the spacing, the supporting roller mounting seat 5-2 is provided with an electric telescopic mechanism and can longitudinally extend and retract relative to the supporting roller base 5-3, and the supporting roller 5-1 is provided with a longitudinal pressure sensor.

[0018] Based on the same inventive concept, the application also provides a welding method for automatic welding of a large-diameter cylinder and a flange, based on the top pressing welding device for automatic welding of a large-diameter cylinder and a flange as described above, comprising the following steps:

[0019] S1, the welding platform 8 is retracted upward through the inclined cable 7;

[0020] S2, the to-be-welded cylinder and the flange 2 are hoisted and placed on the roller tire frame 4 by a crane;

[0021] S3, the two roller supports 5-3 are horizontally moved, so that the two rollers 5-1 are in contact with the bottom of the flange;

[0022] S4, the two roller supports 3-3 are longitudinally moved, so that the two rollers 3-1 are in contact with the end surface of the flange;

[0023] S5, the welding platform 8 is placed flat;

[0024] S6, the rollers of the roller tire frame 4 drive the to-be-welded cylinder and the flange 2 to rotate;

[0025] S7, the submerged arc automatic welding trolley on the welding platform 8 is started to perform welding operation;

[0026] S8, the center of gravity of the to-be-welded cylinder and the flange 2 is automatically adjusted and controlled by the pressure protection device 3 and the roller device 5.

[0027] The automatic center of gravity adjustment control is specifically as follows:

[0028] When the longitudinal pressure borne by the left roller is greater than the longitudinal pressure borne by the right roller, the electric telescopic mechanism of the left roller is elongated upward, and the electric telescopic mechanism of the right roller is contracted downward, until the longitudinal pressures borne by the two rollers are equal;

[0029] When the longitudinal pressure borne by the right roller is greater than the longitudinal pressure borne by the left roller, the electric telescopic mechanism of the right roller is elongated upward, and the electric telescopic mechanism of the left roller is contracted downward, until the longitudinal pressures borne by the two rollers are equal;

[0030] When the transverse pressure borne by the left roller is greater than the transverse pressure borne by the right roller, the electric sliding mechanism of the left roller is transversely moved towards the flange, and the electric sliding mechanism of the right roller is transversely moved away from the flange, until the transverse pressures borne by the two rollers are equal;

[0031] When the transverse pressure borne by the right roller is greater than the transverse pressure borne by the left roller, the electric sliding mechanism of the right roller is transversely moved towards the flange, and the electric sliding mechanism of the left roller is transversely moved away from the flange, until the transverse pressures borne by the two rollers are equal.

[0032] Compared with the prior art, the present application has the following main advantages:

[0033] 1. On the basis of the welding of the submerged arc automatic welding trolley with the roller tire frame, the lateral support and the welding platform are additionally arranged, and the top and bottom of the flange are respectively supported by the top pressing protection device and the roller device, which can effectively prevent the center of gravity from deviating and tilting when the large-diameter cylinder and the flange are submerged arc welded, and effectively solve the center of gravity control problem while ensuring the efficient submerged arc automation efficiency;

[0034] 2. According to the center of gravity deviation and the dumping trend, the automatic adjustment of the center of gravity of the cylinder and the flange can be realized by the electric telescopic mechanism and the electric sliding mechanism, in cooperation with the pressure sensor arranged on the roller and the roller, so as to further ensure the welding quality and safety;

[0035] 3. The welding platform is hinged to the lateral support, and can be collected by the pull rope, so as to facilitate the hoisting and placing of the large-diameter cylinder and the flange;

[0036] 4. The roller base support is longitudinally moved to adjust the height, and the roller base is horizontally moved along the bottom plate to adjust the spacing, so that the device can adapt to the welding of cylinders of various sizes, avoiding the use of cranes to adjust the position of the cylinder, and being convenient and high in applicability. BRIEF DESCRIPTION OF DRAWINGS

[0037] Fig. 1 It is the front view of the top pressing welding device in the embodiment of the application;

[0038] Fig. 2 It is the front view of the top pressing welding device in the embodiment of the application;

[0039] Fig. 3 It is the side view of the top pressing welding device in the embodiment of the application;

[0040] Fig. 4 It is the front view of the top pressing protection device in the embodiment of the application;

[0041] Fig. 5 It is the front view of the top pressing protection device in the embodiment of the application;

[0042] Fig. 6 It is the front view of the top pressing protection device in the embodiment of the application;

[0043] Fig. 7 It is the front view of the top pressing protection device in the embodiment of the application;

[0044] In the figure: 1, lateral support; 2, cylinder and flange to be welded; 3, top pressing protection device; 4, roller tire frame; 5, roller device; 6, inclined brace; 7, inclined pull rope; 8, welding platform; 9, ladder; 10, bottom plate; 3-1, roller; 3-2, roller mounting seat; 3-3, roller base; 5-1, roller; 5-2, roller mounting seat; 5-3, roller base. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and not to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0046] It should be noted that, according to the needs of implementation, each step / component described in the present application can be split into more steps / components, or two or more steps / components or part operations of the steps / components can be combined into a new step / component to achieve the objectives of the present application.

[0047] One kind for large diameter cylinder and flange automatic welding top pressure welding device

[0048] As shown in Figs. 1-7 According to the embodiment of the present application, a top pressure welding device for large diameter cylinder and flange automatic welding is used for submerged arc welding of the to-be-welded cylinder and flange 2.

[0049] Specifically, the top pressure welding device comprises a base plate 10, the base plate 10 is provided with a lateral support 1, a roller tire frame 4 and a roller device 5, the lateral support 1 is installed with a top pressure protection device 3, a welding platform 8 and a ladder 9, and the welding platform 8 is installed with a submerged arc automatic welding trolley.

[0050] When the submerged arc automatic welding trolley welds the to-be-welded cylinder and flange 2, the roller tire frame 4 drives the to-be-welded cylinder and flange 2 to rotate, and the top pressure protection device 3 and the roller device 5 roll and support the top and bottom of the flange respectively, which can effectively prevent the flange from moving and tilting, so as to ensure the stability and reliability of the welding.

[0051] Further, the lateral support 1 is fixed to the base plate 10, and the lateral support 1 is located at the end face of the to-be-welded cylinder and flange 2, and a diagonal brace 6 is arranged between the lateral support 1 and the base plate 10.

[0052] Further, the welding platform 8 is hinged to the upper part of the lateral support 1, and a diagonal cable 7 is arranged between the welding platform 8 and the lateral support 1.

[0053] Further, the top pressure protection device 3 is provided with two, each top pressure protection device 3 is composed of a roller 3-1, a roller mounting seat 3-2 and a roller base 3-3, two roller bases 3-3 are symmetrically arranged on both sides of the lateral support 1, the roller mounting seat 3-2 is arranged on the roller base 3-3, the roller 3-1 is installed on the roller mounting seat 3-2, and the two rollers 3-1 are in contact with the end face of the flange.

[0054] Further, the roller device 5 is provided with two, each roller device 5 is composed of a roller 5-1, a roller mounting seat 5-2 and a roller base 5-3, two roller bases 5-3 are symmetrically arranged on the bottom plate 10, the roller mounting seat 5-2 is arranged on the roller base 5-3, and the roller 5-1 is mounted on the roller mounting seat 5-2, and the two rollers 5-1 are in contact with the bottom of the flange.

[0055] Further, the ladder 9 is fixed to one side of the lateral support 1, and is used for personnel to go up and down the welding platform.

[0056] Further, the two roller bases 3-3 can be longitudinally moved to adjust the height along the lateral support 1, the roller mounting seat 3-2 is provided with an electric sliding mechanism and can be horizontally moved along the roller base 3-3, and the roller 3-1 is provided with a transverse pressure sensor.

[0057] Further, the two roller bases 5-3 can be horizontally moved to adjust the spacing along the bottom plate 10, the roller mounting seat 5-2 is provided with an electric telescopic mechanism and can be longitudinally telescoped relative to the roller base 5-3, and the roller 5-1 is provided with a longitudinal pressure sensor.

[0058] Two, a welding method for automatic welding of a large-diameter cylinder and a flange

[0059] Based on the same inventive concept, the embodiments of the present application also provide a welding method for automatic welding of a large-diameter cylinder and a flange, based on the top pressure welding device for automatic welding of a large-diameter cylinder and a flange as described above, and specifically includes the following steps:

[0060] S1, the welding platform 8 is retracted upward through the inclined cable 7;

[0061] S2, the to-be-welded cylinder and flange 2 are hoisted and placed on the roller tire frame 4 through the crane;

[0062] S3, the two roller bases 5-3 are horizontally moved so that the two rollers 5-1 are in contact with the bottom of the flange;

[0063] S4, the two roller bases 3-3 are longitudinally moved so that the two rollers 3-1 are in contact with the end surface of the flange;

[0064] S5, the welding platform 8 is placed flat;

[0065] S6, the roller of the roller tire frame 4 is started to drive the to-be-welded cylinder and flange 2 to rotate;

[0066] S7, the submerged arc automatic welding trolley on the welding platform 8 is started to perform welding operation;

[0067] S8, the gravity automatic adjustment control is performed on the to-be-welded cylinder and the flange 2 by the top pressure protection device 3 and the roller device 5.

[0068] The gravity automatic adjustment control is specifically as follows:

[0069] 1) When the longitudinal pressure borne by the left roller is greater than that borne by the right roller:

[0070] (the gravity of the to-be-welded cylinder and the flange deviates to the left)

[0071] The electric telescopic mechanism of the left roller is elongated upward, and the electric telescopic mechanism of the right roller is contracted downward until the longitudinal pressures borne by the two rollers are equal, and the gravity is automatically returned to normal.

[0072] 2) When the longitudinal pressure borne by the right roller is greater than that borne by the left roller:

[0073] (the gravity of the to-be-welded cylinder and the flange deviates to the right)

[0074] The electric telescopic mechanism of the right roller is elongated upward, and the electric telescopic mechanism of the left roller is contracted downward until the longitudinal pressures borne by the two rollers are equal, and the gravity is automatically returned to normal.

[0075] 3) When the lateral pressure borne by the left roller is greater than that borne by the right roller:

[0076] (the to-be-welded cylinder and the flange have a tendency to tilt to the left)

[0077] The electric sliding mechanism of the left roller is moved laterally to the direction close to the flange, and the electric sliding mechanism of the right roller is moved laterally to the direction away from the flange until the lateral pressures borne by the two rollers are equal, and the automatic anti-tilting is realized.

[0078] 4) When the lateral pressure borne by the right roller is greater than that borne by the left roller:

[0079] (the to-be-welded cylinder and the flange have a tendency to tilt to the right)

[0080] The electric sliding mechanism of the right roller is moved laterally to the direction close to the flange, and the electric sliding mechanism of the left roller is moved laterally to the direction away from the flange until the lateral pressures borne by the two rollers are equal, and the automatic anti-tilting is realized.

[0081] In summary:

[0082] 1. On the basis of the automatic submerged arc welding trolley cooperating with the roller tire frame for welding, the lateral support and the welding platform are additionally arranged, and the top and bottom of the flange are respectively supported by the top pressure protection device and the roller device, which can effectively prevent the center of gravity from deviating and tilting when the large-diameter cylinder and the flange are submerged arc welded, and effectively solve the problem of center of gravity control while ensuring the efficient automatic submerged arc welding efficiency;

[0083] 2. Through the electric telescopic mechanism and the electric sliding mechanism, cooperating with the pressure sensor arranged on the roller and the roller, the automatic adjustment of the center of gravity of the cylinder and the flange can be realized according to the center of gravity deviation and the tilting trend, further ensuring the welding quality and safety;

[0084] 3. The welding platform is hinged to the lateral support and can be retracted by a pull rope, which is convenient for hoisting and placing the large-diameter cylinder and the flange;

[0085] 4. By longitudinally moving and adjusting the height of the roller base support and horizontally moving and adjusting the distance of the roller base along the bottom plate, the device can adapt to the welding of cylinders of various sizes, avoiding the use of cranes to adjust the position of the cylinder, and is convenient to operate and has high applicability.

[0086] Those skilled in the art will readily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A top pressure welding method for automatic welding of large-diameter cylinders and flanges, based on a top pressure welding device for submerged-arc welding of a cylinder to be welded and a flange (2), characterized in that: The top pressure welding device comprises a bottom plate (10), a lateral support (1), a roller tire support (4) and a roller device (5) are arranged on the bottom plate (10), a top pressure protection device (3), a welding platform (8) and a ladder (9) are arranged on the lateral support (1), and a submerged arc automatic welding trolley is arranged on the welding platform (8); When the submerged arc automatic welding trolley welds the to-be-welded cylinder and the flange (2), the roller tire support (4) drives the to-be-welded cylinder and the flange (2) to rotate, and the top pressure protection device (3) and the roller device (5) roll and support the top and bottom of the flange respectively; The top pressure protection device (3) is provided with two, each top pressure protection device (3) is composed of a roller (3-1), a roller mounting seat (3-2) and a roller base (3-3), the two roller bases (3-3) are symmetrically arranged on the two sides of the lateral support (1), the roller mounting seat (3-2) is arranged on the roller base (3-3), the roller (3-1) is arranged on the roller mounting seat (3-2), and the two rollers (3-1) are in contact with the end face of the flange; The roller device (5) is provided with two, each roller device (5) is composed of a roller (5-1), a roller mounting seat (5-2) and a roller base (5-3), the two roller bases (5-3) are symmetrically arranged on the bottom plate (10), the roller mounting seat (5-2) is arranged on the roller base (5-3), and the roller (5-1) is arranged on the roller mounting seat (5-2); and the two rollers (5-1) are in contact with the bottom of the flange; The two roller bases (3-3) can move longitudinally along the lateral support (1) to adjust the height, the roller mounting seat (3-2) is provided with an electric sliding mechanism and can move horizontally along the roller base (3-3), and the roller (3-1) is provided with a transverse pressure sensor; The two roller bases (5-3) can move horizontally along the bottom plate (10) to adjust the spacing, the roller mounting seat (5-2) is provided with an electric telescopic mechanism and can longitudinally extend and retract relative to the roller base (5-3), and the roller (5-1) is provided with a longitudinal pressure sensor; The welding platform (8) is hinged to the upper part of the lateral support (1), and a stay rope (7) is arranged between the welding platform (8) and the lateral support (1); The welding method comprises the following steps: S1, the welding platform (8) is retracted upward through the stay rope (7); S2, the to-be-welded cylinder and the flange (2) are hoisted and placed on the roller tire support (4) through the crane; S3, the two roller bases (5-3) are moved horizontally, so that the two rollers (5-1) are in contact with the bottom of the flange; S4, the two roller bases (3-3) are moved longitudinally, so that the two rollers (3-1) are in contact with the end face of the flange; S5, the welding platform (8) is placed horizontally; S6, the roller of the roller tire support (4) drives the to-be-welded cylinder and the flange (2) to rotate; S7, the submerged arc automatic welding trolley on the welding platform (8) is started to perform welding operation; S8, the top pressure protection device (3) and the roller device (5) are used to automatically adjust and control the gravity center of the to-be-welded cylinder and the flange (2). The gravity center automatic adjustment control is specifically as follows: When the longitudinal pressure borne by the left roller is greater than that borne by the right roller, the electric telescopic mechanism of the left roller is elongated upward, and the electric telescopic mechanism of the right roller is contracted downward until the longitudinal pressures borne by the two rollers are equal; When the longitudinal pressure borne by the right roller is greater than that borne by the left roller, the electric telescopic mechanism of the right roller is elongated upward, and the electric telescopic mechanism of the left roller is contracted downward until the longitudinal pressures borne by the two rollers are equal; When the lateral pressure borne by the left roller is greater than that borne by the right roller, the electric sliding mechanism of the left roller is moved in the direction of approaching the flange, and the electric sliding mechanism of the right roller is moved in the direction of moving away from the flange until the lateral pressures borne by the two rollers are equal; When the lateral pressure borne by the right roller is greater than that borne by the left roller, the electric sliding mechanism of the right roller is moved in the direction of approaching the flange, and the electric sliding mechanism of the left roller is moved in the direction of moving away from the flange until the lateral pressures borne by the two rollers are equal.

2. The welding method of claim 1, wherein: The lateral support (1) is fixed on the bottom plate (10), and the lateral support (1) is located at the end face of the to-be-welded cylinder and the flange (2), and a diagonal brace (6) is arranged between the lateral support (1) and the bottom plate (10).

3. The welding method of claim 1, wherein: The ladder (9) is fixed on one side of the lateral support (1).

Images