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CN-224222926-U - High-temperature-resistant submerged arc welding gun device for repairing large-scale roller overlaying welding

CN224222926UCN 224222926 UCN224222926 UCN 224222926UCN-224222926-U

Abstract

The utility model relates to a large-scale roller build-up welding technical field especially relates to a high temperature resistant submerged arc welder device for large-scale roller build-up welding repair, including welding flux unloading hose, welding flux unloading steel pipe, send silk system, conducting rod, heat-insulating mechanism, insulation can, unloading positioning mechanism, tee bend shunt, conducting nozzle and conducting nozzle protective sheath, heat-insulating mechanism include steel sheet shell and thermal-insulated fire-resistant cotton, the steel sheet shell is the level and sets up between insulation can lid and the silk system of sending, the steel sheet shell sets up thermal-insulated fire-resistant cotton towards one side of sending the silk system, welding flux unloading positioning mechanism sets up on the outer circumference of conducting rod in the insulation can, welding unloading positioning mechanism's oblique side sets up two fixed cover and cup joints welding flux unloading steel pipe, the bottom of conducting nozzle protective sheath be equipped with the arc breach, the utility model discloses beneficial effect: the bead welding device can go deep into a high-temperature heat preservation furnace to carry out bead welding, and the stability of bead welding forming in the bead welding process is improved.

Inventors

  • YU SHUANG
  • MENG QINGZHI
  • WANG JIN
  • Hou Zuchun
  • YAO CHENGWU

Assignees

  • 鞍钢重型机械有限责任公司

Dates

Publication Date
20260512
Application Date
20250508

Claims (8)

  1. 1. The high-temperature-resistant submerged arc welding gun device for repairing large-scale roller overlaying comprises a welding flux blanking hose (3), a welding flux blanking steel pipe (4), a wire feeding system (6), a conducting rod (7), a heat insulation mechanism (8), an insulation box (9), a blanking positioning mechanism (10), a three-way shunt (11), a conducting nozzle (12) and a conducting nozzle protective sleeve (13), wherein the welding flux blanking hose (3) stretches into the welding blanking steel pipe (4), the high-temperature-resistant submerged arc welding gun device is characterized in that the heat insulation mechanism (8) comprises a steel plate shell (8-1) and heat insulation cotton (8-2), the steel plate shell (8-1) is horizontally arranged between the insulation box (9) and the wire feeding system (6), the welding flux blanking steel pipe (4) and the conducting rod (7) penetrate through the steel plate shell (8-1) to stretch into the insulation box (9), one side of the steel plate shell (8-1) faces the wire feeding system (6) to be provided with the heat insulation fire-resistant cotton (8-2), the welding flux blanking positioning mechanism (10) is arranged in the heat insulation box (9) and the circumference of the upper conductive rod (7) and the outer circumference of the steel pipe (7) is fixedly sleeved with the welding flux blanking mechanism (10), make welding flux unloading steel pipe (4) and conducting rod (7) form a 25 ~45 intersection angle through welding flux unloading positioning mechanism (10), welding flux unloading positioning mechanism (10) bottom sets up tee bend shunt (11), welding flux unloading steel pipe (4) and conducting rod (7) stretch into respectively in tee bend shunt (11), the bottom threaded connection conducting nozzle protective sheath (13) of tee bend shunt (11), conducting nozzle (12) set up in conducting nozzle protective sheath (13), the bottom of conducting nozzle protective sheath (13) be equipped with arc breach (13-1).
  2. 2. The high-temperature-resistant submerged arc welding gun device for repairing the surfacing of the large roller according to claim 1 is characterized in that the heat insulation mechanism (8) further comprises a blanking insulating sleeve (8-3), a positioning sleeve (8-4), a locking nut (8-5) and a fixed insulating sleeve (8-6), the blanking insulating sleeve (8-3) is arranged between a welding flux blanking steel pipe (4) and a steel plate shell (8-1) and sleeved on the outer circumference of the welding flux blanking steel pipe (4), the positioning sleeve (8-4) is sleeved on the outer circumference of a conducting rod (7) through a screw (8-7), the positioning sleeve (8-4) is sleeved with a fixed insulating sleeve (8-6), the fixed insulating sleeve (8-6) is fixed on the outer circumference of the positioning sleeve (8-4) through a locking nut (8-5), and the fixed insulating sleeve (8-6) is fixedly connected with the steel plate shell (8-1) through a bolt (8-8).
  3. 3. The high-temperature-resistant submerged arc welding gun device for repairing a large-scale roll overlaying according to claim 1, wherein the welding flux blanking positioning mechanism (10) comprises an extension nut (10-1), an upper connecting sleeve (10-3), a lower connecting sleeve (10-7), a first fixing sleeve (10-5) and an insulating sleeve (10-4), the upper connecting sleeve (10-3) and the lower connecting sleeve (10-7) are sequentially sleeved on the outer circumference of a conductive rod (7), the first fixing sleeve (10-5) is arranged on the outer circumference of the connecting position of the upper connecting sleeve (10-3) and the lower connecting sleeve (10-7), the first fixing sleeve (10-5) is used for locking and fixing the upper connecting sleeve (10-3) and the lower connecting sleeve (10-7) through a double-headed bolt (10-6), an insulating sleeve (10-4) is arranged between the upper connecting sleeve (10-3) and the first fixing sleeve (10-5), the top of the upper connecting sleeve (10-3) is connected with the extension nut (10-1) in a threaded manner, a positioning screw (10-2) is arranged on the side surface of the extension nut (10-1) and a positioning screw (10-2) is arranged on the outer circumference of the connecting position of the conductive rod (10-7), the second fixing sleeve (10-8) is fixed on the outer inclined side of the first fixing sleeve (10-5) through a fixing bolt.
  4. 4. The high-temperature-resistant submerged arc welding gun device for repairing the overlaying welding of the large-scale roller according to claim 3, wherein a gap of 1.0-3.0 mm is reserved between the lower connecting sleeve (10-7) and the conducting rod (7).
  5. 5. A high temperature resistant submerged arc welding gun apparatus for large scale roll overlay repair according to claim 1 or 3, characterized in that the flux blanking positioning mechanism (10) is adjustable in height position of the conductive rod (7).
  6. 6. The high-temperature-resistant submerged arc welding gun device for repairing the overlaying welding of the large-scale roller according to claim 1, wherein the intersection angle of two inlets of the three-way diverter (11) connected with the flux blanking steel pipe (4) and the conducting rod (7) is consistent with the intersection angle of the flux blanking steel pipe (4) and the conducting rod (7), and the intersection angle is 25-45 degrees.
  7. 7. The high-temperature-resistant submerged arc welding gun device for repairing the overlaying welding of the large-scale roller according to claim 1, wherein the arc diameter of the arc-shaped notch (13-1) is about phi 8-12 mm, and the notch height is about 5-10 mm.
  8. 8. The high-temperature-resistant submerged arc welding gun device for repairing the overlaying welding of the large-scale roller according to claim 1, wherein the distance between the arc-shaped notch (13-1) and the bottom of the contact nozzle (12) is 12-15 mm.

Description

High-temperature-resistant submerged arc welding gun device for repairing large-scale roller overlaying welding Technical Field The utility model relates to the technical field of large-scale roller overlaying, in particular to a high-temperature-resistant submerged arc welding gun device for repairing large-scale roller overlaying. Background The large-scale roller surfacing repair relates to multi-layer multi-pass welding with large area and large thickness, and welding stress is accumulated layer by layer, so that crack defects are easily generated in the surfacing process, and the repair quality is affected. Therefore, the large-scale roller overlaying needs to be preheated before welding and heat preservation between layers of the welding bead in a heating and heat preservation furnace so as to reduce welding stress. However, the conventional submerged arc welding gun device has the disadvantages that (1) although the build-up welding in the holding furnace can be realized by extending the conductive rod of the submerged arc welding head, the wire feeding system is damaged by heat radiation in the holding furnace, and continuous welding cannot be performed for a long time. (2) The flux blanking pipe, the connecting device thereof and the conducting rod are lack of insulation, and the quality of the overlaying welding is unstable due to current diversion in the long-time welding process. (3) The contact tip protective sleeve is cylindrical, the bottom is a plane, and the bead is a convex arc. The bottom surface of the protective sleeve often scratches a welding path, so that the welding path is deformed and damaged, and the welding path forming quality is affected. Patent CN219900608U, "a large BD roll repair device", discloses a large BD roll repair device in which a submerged arc welding gun is placed outside an incubator to reduce damage of heat radiation to a wire feeding motor of a submerged arc welding head. However, the arc part of the roller is required to be exposed outside the heat preservation furnace, so that heat preservation between weld pass layers in the surfacing process is not facilitated, the welding stress is increased, the cladding metal structure of the surfacing layer is affected, and accordingly the surfacing layer is cracked or the service performance of the roller after repair is reduced. Patent CN220943617U "a compact type long rod high-power water-cooling welding gun" discloses an automatic submerged arc surfacing water-cooling welding gun, which is provided with a heat insulation board above a conductive copper bar, a water pipe connecting board is arranged on the heat insulation board, and a water inlet pipe and a water outlet pipe are arranged on the water pipe connecting board. The welding gun can extend into the heat preservation furnace to finish continuous surfacing operation. However, the addition of the design of the water cooling device makes the surfacing equipment more complex, and increases the maintenance cost and difficulty of the equipment. Therefore, those skilled in the art have been working to develop a high-efficiency, stable and easy-to-maintain welding gun that can extend into a roll holding furnace at a high temperature of 350-450 ℃ to complete continuous build-up welding operation. Disclosure of utility model In order to overcome the defects of the prior art, the utility model provides the high-temperature-resistant submerged arc welding gun device for repairing the overlaying of the large-sized roller, which not only can go deep into a high-temperature heat preservation furnace to carry out overlaying, but also obviously improves the stability of welding bead forming in the overlaying process through structural improvement, and is particularly suitable for large-area overlaying application of cylindrical revolving bodies. In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme: The utility model provides a be used for prosthetic high temperature resistant submerged arc welder device of large-scale roller build-up welding, includes welding flux unloading hose, welding flux unloading steel pipe, send silk system, conducting rod, heat insulating mechanism, insulation can, unloading positioning mechanism, tee bend shunt, conducting nozzle and conducting nozzle protective sheath, welding flux unloading hose stretch into in the welding flux unloading steel pipe, heat insulating mechanism include steel sheet shell and thermal insulation fire-resistant cotton, the steel sheet shell is the level and sets up between heat preservation case lid and the silk system of sending, welding flux unloading steel pipe and conducting rod pass the steel sheet shell and stretch into in the insulation can, the steel sheet shell sets up thermal insulation fire-resistant cotton towards one side of sending the silk system, welding flux unloading positioning mechanism set up on the conducting rod outer circumference in the i