CN-122007571-A - Submerged arc welding device for girth weld inside large cylinder

CN122007571ACN 122007571 ACN122007571 ACN 122007571ACN-122007571-A

Abstract

The invention discloses a submerged arc welding device for girth welds in a large cylinder, which comprises a stable base, wherein a balancing weight is fixed on the top outer wall of the stable base through bolts, symmetrically distributed telescopic adjusting rods are welded on one side of the top of the stable base, bearing support plates are welded on the top outer walls of the two telescopic adjusting rods, U-shaped frames are welded on the top outer walls of the bearing support plates, and guide grooves are formed in the two sides of each U-shaped frame along the length direction. According to the invention, the welding height is quickly adjusted through the telescopic adjusting rod, the sliding fit of the bearing pipe and the bearing rod can meet the height requirements of different cylinders, the fastening bolt ensures stable locking after adjustment, the servo motor drives the threaded rod to rotate, and drives the guide block to slide along the guide groove, so that the transverse accurate movement of the hot-rolled groove steel bar is realized, the circumferential weld at different positions inside the cylinder can be covered by matching with the rolling of the arc welding vehicle base on the hot-rolled groove steel bar, and the problems of inconvenient adjustment and poor suitability of the traditional device are effectively solved.

Inventors

SU SHENGYI
SHEN ZHI
LV GUOQIANG
REN HUA
MA QIANG
WANG YUE
JIANG WEI
HUI YUNLONG

Assignees

鞍钢重型机械有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260303

Claims (8)

1. The submerged arc welding device for the girth weld inside the large cylinder comprises a stable base (1), and is characterized in that a balancing weight (2) is fixed on the top outer wall of the stable base (1) through bolts, symmetrically distributed telescopic adjusting rods (3) are welded on one side of the top of the stable base (1), a bearing support plate (4) is welded on the top outer wall of each telescopic adjusting rod (3), a U-shaped frame (5) is welded on the top outer wall of each bearing support plate (4), guide grooves (6) are formed in two sides of each U-shaped frame (5) along the length direction, guide blocks (7) are slidably inserted into the inner walls of the guide grooves (6), hot-rolled groove steel bars (8) are welded on the outer walls of one side opposite to the guide blocks (7), threaded rods (9) are connected in the middle of one guide blocks (7), a servo motor (10) is connected to one end of each threaded rod (9), and a reinforcing cross rod (11) is welded between the two hot-rolled groove steel bars (8); The top of the hot rolling groove steel bar (8) is provided with an arc welding vehicle base (12) in a rolling way, the outer wall of the top of the arc welding vehicle base (12) is fixedly provided with an inclined table mounting frame (13) through screws, a welding machine head (14) is arranged on the inclined table mounting frame (13), one side of the welding machine head (14) is provided with an angle-adjustable welding gun (16) through an angle adjusting knob (15), a dust blowing air pipe (17) penetrates through the lower part of the middle part of the arc welding vehicle base (12), and the dust blowing air pipe (17) is communicated with an external air source; The bottom both sides outer wall of U type frame (5) all is provided with first backing roll (20) through the bolt fastening, and two hot rolling groove billet (8) are relative one side outer wall all rotates and are provided with electric telescopic handle (23), the end rotation of electric telescopic handle (23) is connected with second backing roll (24), and the end rotation of second backing roll (24) is installed on hot rolling groove billet (8), one side outer wall of bearing extension board (4) is provided with PLC controller (31) through the bolt fastening.
2. Submerged arc welding device for girth welds inside large cylinders according to claim 1, characterized in that said telescopic adjusting rod (3) comprises a bearing tube welded on the stabilizing base (1), and the inner wall of the bearing tube is slidingly inserted with a bearing rod, one side outer wall of the bearing tube is connected with a fastening bolt through screw thread, and the fastening bolt forms a fastening fit with the bearing rod.
3. The submerged arc welding device for the circumferential weld inside the large cylinder according to claim 1, wherein sliding grooves (26) are welded at four corners of the top of the stable base (1), sliding blocks (27) are inserted into the inner walls of the sliding grooves (26) in a sliding manner, and foot brake universal wheels (28) are fixed on the outer walls of the bottoms of the sliding blocks (27) through screws.
4. A submerged arc welding device for a girth weld inside a large cylinder according to claim 3, wherein two ends of the outer wall of one side of the sliding groove (26) are provided with adjusting jacks (29) distributed equidistantly, two sides of the sliding block (27) are provided with adjusting jacks (29) in a penetrating way, the inner walls of the adjusting jacks (29) are provided with positioning bolts (30) in a plugging mode, and the positioning bolts (30) are in a plugging fit with the adjusting jacks (29).
5. The submerged arc welding device for the circumferential weld inside the large cylinder according to claim 1, wherein a cleaning brush disc (18) is rotatably installed on one side of the top of the arc welding vehicle base (12), the top of the cleaning brush disc (18) is connected with a driving motor (19) through a coupling, and the bottom of the cleaning brush disc (18) is tightly attached to the inner wall of the bottom of the large cylinder.
6. The submerged arc welding device for the circumferential weld inside the large cylinder according to claim 1, wherein the outer wall of one side of the telescopic adjusting rod (3) close to the U-shaped frame (5) is penetrated and provided with supporting clamping grooves (21) distributed equidistantly, the outer walls of two sides of the bottom of the U-shaped frame (5) are rotatably provided with partial pressure supporting rods (22), and the partial pressure supporting rods (22) and the supporting clamping grooves (21) form plug-in connection.
7. Submerged arc welding apparatus for girth welding inside large cylinder according to claim 1, wherein said hot rolled steel strip (8) has an L-shaped stopper (25) welded to the bottom outer wall thereof, and said L-shaped stopper (25) is perpendicular to the bottom outer wall of the hot rolled steel strip (8), said second supporting roller (24) is closely attached to the L-shaped stopper (25), and the maximum angle of the second supporting roller (24) to the ground is 90 °.
8. The submerged arc welding apparatus for the circumferential weld inside the large cylinder according to claim 5, wherein the PLC controller (31) is electrically connected with the servo motor (10), the driving motor (19) and the electric telescopic rod (23) through wires, and the PLC controller (31) is connected with an external power source through wires.

Description

Submerged arc welding device for girth weld inside large cylinder Technical Field The invention relates to the technical field of submerged arc welding, in particular to a submerged arc welding device for a girth weld in a large cylinder. Background The large cylinder is used as core equipment in the industries of chemical engineering, electric power, metallurgy and the like, is widely applied to the scenes of pressure vessels, pipeline transportation and the like, and the welding quality of an internal girth weld directly influences the tightness, pressure resistance and service life of the equipment. Submerged arc welding is a mainstream process for girth welding of large-sized cylinders due to the advantages of high welding efficiency, good weld formation and high degree of automation. In the welding process of the girth weld in the large cylinder, the accurate positioning, angle adjustment and stable movement of the welding gun are required to be realized through a special device so as to meet the welding process requirements. However, the prior submerged arc welding device has obvious defects in actual use: 1. The welding position adjustment flexibility is poor, the height adjustment of the existing device mostly adopts a fixed bracket or a simple telescopic structure, the adjustment precision is low, the operation is complex, the transverse position adjustment is difficult to realize automatic control, and large cylinders with different diameters and lengths cannot be quickly adapted, so that the welding preparation time is long; 2. The running stability of the device is insufficient, the internal space of the large cylinder is limited, the device is easy to vibrate due to gravity center deviation during welding, the positioning accuracy after movement is poor, the self-walking speed of the submerged arc welding trolley and the rotating speed of the cylinder are difficult to be matched accurately, so that the welding seam deviation and uneven molding are caused, and the welding operation difficulty is increased; 3. the welding area is clean untimely, and impurities such as rust and dust are easy to remain in the barrel, and the prior device lacks synchronous cleaning mechanism, and the impurities can be mixed into the welding seam to cause defects such as air holes and slag inclusion, and the smoke dust generated in the welding process can not be discharged in time, so that the welding field and the welding seam quality are affected. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a submerged arc welding device for a girth weld in a large cylinder. In order to achieve the above purpose, the present invention adopts the following technical scheme: The submerged arc welding device for the girth weld inside the large cylinder comprises a stable base, wherein a balancing weight is fixed on the outer wall of the top of the stable base through bolts, symmetrically distributed telescopic adjusting rods are welded on one side of the top of the stable base, bearing support plates are welded on the outer walls of the tops of the two telescopic adjusting rods, U-shaped frames are welded on the outer walls of the tops of the bearing support plates, guide grooves are formed in the two sides of the U-shaped frames along the length direction, guide blocks are inserted into the inner walls of the guide grooves in a sliding mode, hot rolling groove steel bars are welded on the outer walls of the two opposite sides of the guide blocks, one of the guide blocks is provided with a threaded rod in a threaded mode, one end of the threaded rod is connected with a servo motor through a coupler, and a reinforcing cross rod is welded between the two hot rolling groove steel bars; The arc welding machine comprises a hot rolling groove steel bar, wherein an arc welding vehicle base is arranged at the top of the hot rolling groove steel bar in a rolling manner, an inclined bench mounting frame is fixed on the outer wall of the top of the arc welding vehicle base through screws, a welding machine head is arranged on the inclined bench mounting frame, one side of the welding machine head is provided with an angle-adjustable welding gun through an angle adjusting knob, a dust blowing air pipe penetrates through the lower part of the middle part of the arc welding vehicle base, and an external air source is connected with the dust blowing air pipe; The outer walls of two sides of the bottom of the U-shaped frame are fixedly provided with first supporting rollers through bolts, the outer walls of one side, opposite to the steel bars, of the two hot rolling grooves are respectively provided with an electric telescopic rod in a rotating mode, the tail ends of the electric telescopic rods are rotatably connected with second supporting rollers, the tail ends of the second supporting rollers are rotatably installed on the steel bars of the hot rolling grooves, and one side outer wall of the bea