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CN-121988974-A - Welding device for metal pipe fitting

CN121988974ACN 121988974 ACN121988974 ACN 121988974ACN-121988974-A

Abstract

The invention discloses a welding device for metal pipe fittings, in particular to the technical field of metal pipe fitting welding, wherein a sealing unit is arranged, a flange is aligned with the axis of a metal pipe, a ring plate seat is positioned at the joint position of the flange and the inner wall of the welding end of the metal pipe, an air bag piece on the outer side of each ring block is inflated and expanded to drive a corresponding contact ring pad to be ejected outwards and respectively adhered to the metal pipe and the inner wall end part of the flange, the sealing unit forms a stable support on the inner side of a welding interface, a region between the inner wall end part of the flange and the inner wall end part of the metal pipe is sealed, and a stable protective gas layer is formed near a welding seam, so that the oxidation of the welding seam is effectively reduced, the welding quality is improved, and a friction roller drives the flange and the metal pipe to synchronously rotate to drive each ring block to rotate around the ring plate seat, so that the welding region continuously passes through the welding position of an inner welding head, and the continuous processing of the ring welding seam is realized, and the welding efficiency and the welding seam consistency are improved.

Inventors

  • TANG ZHIHONG
  • WEN QUAN
  • DENG JIUSHENG

Assignees

  • 湖南长汇机械制造有限公司

Dates

Publication Date
20260508
Application Date
20260316

Claims (8)

  1. 1. The welding device for the metal pipe fitting comprises bearing seats (2) and a feeding frame (7) which are arranged at two ends of the top surface of a base station (1), and is characterized in that a butt joint bin for limiting a flange is arranged at the top of the feeding frame (7), and a moving seat (3) which slides along the base station (1) is arranged between the feeding frame (7) and the bearing seats (2); The upper surface of the bearing seat (2) is provided with a U-shaped groove for accommodating a metal pipe, the end part of the movable seat (3) is provided with a butt joint seat (5) which is in contraposition with the butt joint cabin in a lifting manner, the upper surface of the butt joint seat (5) is provided with a limiting groove (19) for positioning a flange, one side surface of the butt joint seat (5) is provided with a through hole (6) for a closed unit to pass through, and friction rollers which are in contact with the corresponding metal pipe and the flange are respectively arranged in the limiting groove (19) and the U-shaped groove; A mounting plate (22) pushed by a stroke cylinder is arranged in the movable seat (3), a reinforcing rod (23) is fixed on the inner side of the mounting plate (22), and a sealing unit which is abutted against the flange and the inner wall of the welding end of the metal tube is fixed on the end part of the reinforcing rod (23); the closed unit comprises a ring plate seat (25), and two arc-shaped grooves are formed in the outer side of the middle of the ring plate seat (25); The outer wall surface of the annular plate seat (25) is rotatably sleeved with annular blocks (29) on two sides of the arc-shaped slot, an air bag piece (28) is arranged outside each annular block (29), the outer side surface of each air bag piece (28) is connected with a contact annular pad (27), one contact annular pad (27) is in contact with the inner wall end part of the metal pipe, and the other contact annular pad (27) is in contact with the inner wall end part of the flange; an inner welding head (30) facing the corresponding arc-shaped slot is arranged on the rod body in the middle of the mounting plate (22); The inner wall of each arc-shaped slot is provided with a plurality of channels (26) for spraying protective gas to the welding area.
  2. 2. Welding device for metal pipe fittings according to claim 1, characterized in that the inside of the ring plate seat (25) is provided with an air cavity communicating with the channel (26), the inner wall of the ring plate seat (25) is provided with an air supply area communicating with the air cavity, and the air inlet end of the air supply area is connected with a hose (24).
  3. 3. The welding device for metal pipe fittings according to claim 1, characterized in that a smoke exhaust box (31) is installed at the inner cavity end part of the ring plate seat (25), a smoke inlet is formed in the top surface of the smoke exhaust box (31), a filter screen is arranged in the smoke exhaust box (31), and an exhaust port is formed in the end face, facing the ring plate seat (25), of the smoke exhaust box (31).
  4. 4. Welding device for metal pipes according to claim 1, characterized in that the outside of the mobile seat (3) is fitted with a restraining bar (21), the restraining bar (21) being slidingly arranged with the mobile seat (3); An electric push rod (20) for pushing the butt joint seat (5) to lift is embedded in the bottom surface of the inner cavity of the movable seat (3); the center of the through hole (6) is consistent with the center of the flange and the center of the metal pipe.
  5. 5. The welding device for metal pipe fittings according to claim 1, characterized in that a sliding table (9) is installed on the top surface of the feeding frame (7), a fixed vertical plate (10) is installed at the end part of the top surface of the feeding frame (7), a sliding rod (11) is installed on a sliding block of the sliding table (9), the sliding rod (11) slides through the inside of the fixed vertical plate (10) and is connected with a pushing plate (12), and a plurality of positioning columns (13) matched with flange holes are installed on the inner side surface of the pushing plate (12).
  6. 6. The welding device for metal pipe fittings according to claim 5, characterized in that a feeding hole (8) for flange entrance is arranged on the surface of one end of the butt joint bin facing the positioning column (13), a blanking port is arranged at the lower part of the butt joint bin, and a turning plate (18) is rotatably connected to the upper end of the blanking port through a rotating shaft.
  7. 7. The welding device for metal pipe fittings according to claim 1, characterized in that a linear guide rail (14) is arranged on the inner wall of a cavity in the feeding frame (7), a limiting plate (15) is slidably arranged on the linear guide rail (14), a positioning plate (17) pushed by an electric cylinder is slidably sleeved outside the limiting plate (15), and an electric clamping jaw (16) extending into a butt joint bin and clamping the end part of a flange is arranged on the lower end face of the positioning plate (17).
  8. 8. A welding device for metal pipes according to claim 1, characterized in that the upper surface of the base (1) is slidably fitted with an outer welding head (4) and a grinding wheel, respectively, the outer welding head (4) and the grinding wheel being slid closer to or farther away from each other simultaneously, and being located outside the welding area of the metal pipe and the flange.

Description

Welding device for metal pipe fitting Technical Field The invention relates to the technical field of metal pipe fitting welding, in particular to a welding device for metal pipe fittings. Background The metal pipe fitting is widely applied to the fields of petrochemical industry, constructional engineering, mechanical manufacturing, energy source conveying and the like, and in practical application, a plurality of metal pipe fittings are often required to be connected in a welding mode so as to form a stable and reliable pipeline structure. The quality of the weld directly affects the tightness, strength and service life of the piping system, and therefore welding equipment is particularly important during pipe production and installation. In the prior art, the metal pipe fitting is welded by manual welding or a simple welding auxiliary device, such as annular welding of the pipe fitting and the connecting pipe by a manual handheld welding gun, or fixing of the pipe fitting by a simple bracket. Because metal pipe is generally cylindrical in structure, rotation or positional displacement is liable to occur during welding, and particularly, in continuous welding, the stability of the relative position between the welding area and the welding head is poor. The manual adjustment of the position of the pipe fitting is low in operation efficiency, unstable welding angles are easy to cause, and therefore conditions of discontinuous welding seams, unstable welding connection and the like occur, and welding quality and welding seam consistency are affected. Disclosure of Invention The object of the present invention is to provide a welding device for metal tubes, which solves the problems mentioned in the background art. The invention mainly solves the technical problems that: When the metal pipe fitting is welded continuously, the efficiency of manually adjusting the position of the pipe fitting is low because of the poor stability of the relative position of the welding area, and the unstable welding angle is easy to cause, so that the discontinuous welding seam and the unstable welding connection occur, and the welding quality and the consistency of the welding seam are affected. The invention can be realized by the following technical scheme: The welding device for the metal pipe fitting comprises bearing seats and a feeding frame, wherein the bearing seats and the feeding frame are arranged at two ends of the top surface of a base, a butt joint bin for limiting a flange is arranged at the top of the feeding frame, and a moving seat sliding along the base is arranged between the feeding frame and the bearing seats; The upper surface of the bearing seat is provided with a U-shaped groove for accommodating the metal pipe, the end part of the movable seat is provided with a butt joint seat in a lifting manner, the butt joint seat is aligned with the butt joint bin, the upper surface of the butt joint seat is provided with a limiting groove for positioning the flange, one side surface of the butt joint seat is provided with a through hole for the passage of the closed unit, and friction rollers which are in contact with the corresponding metal pipe and the flange are respectively arranged in the limiting groove and the U-shaped groove; The inside of the movable seat is provided with a mounting plate pushed by a stroke cylinder, the inner side of the mounting plate is fixed with a reinforcing rod, and the end part of the reinforcing rod is fixed with a closed unit which is abutted against the inner wall of the welding end of the flange and the metal tube; the closed unit comprises a ring plate seat, and two arc-shaped grooves are formed in the outer side of the middle of the ring plate seat; the outer wall surface of the annular plate seat is rotatably sleeved with annular blocks at two sides of the arc-shaped slot, an air bag piece is arranged outside each annular block, the outer side surface of each air bag piece is connected with a contact annular pad, one contact annular pad is contacted with the end part of the inner wall of the metal pipe, and the other contact annular pad is contacted with the end part of the inner wall of the flange; an inner welding head facing the corresponding arc-shaped slot is arranged on the rod body in the middle of the mounting plate; The inner wall of each arc-shaped slot is provided with a plurality of channels for spraying protective gas to the welding area. The invention further technically improves that an air cavity communicated with the channel is arranged in the annular plate seat, an air supply area communicated with the air cavity is arranged on the inner wall of the annular plate seat, and the air inlet end of the air supply area is connected with a hose. The invention is further technically improved in that a smoke exhaust box is arranged at the end part of the inner cavity of the annular plate seat, a smoke inlet is formed in the top surface of the smoke exhaust box, a