5results about How to "Increase weld penetration" patented technology

The invention relates to the technical field of petroleum and natural gas development, and discloses a double-sheath mineral insulated heating cable and a preparation method and application thereof. The double-sheath mineral insulation heating cable sequentially comprises a core body, an insulation heat conduction layer, an inner sheath layer and an outer sheath layer from inside to outside. Wherein the yield strength of the inner sheath layer is greater than or equal to 205 MPa, the tensile strength is greater than or equal to 520 MPa, the ductility is greater than or equal to 35%, and the hardness is less than or equal to 32 HRC; the yield strength of the outer sheath layer is greater than or equal to 205 MPa, the tensile strength is greater than or equal to 520 MPa, the elongation is greater than or equal to 35%, and the hardness is less than or equal to 32 HRC; the thickness of the outer sheath layer is 30%-50% smaller than that of the inner sheath layer, the heat conductivity of the inner sheath layer is not larger than that of the outer sheath layer, and the heat conductivity of the inner sheath layer is not smaller than that of the insulating heat conduction layer. The double-sheath mineral insulation heating cable can be suitable for being applied to deep wells and ultra-deep wells of H2S, CO2 and Cl <->, the use temperature is 350-750 DEG C, and the service life is more than 3 years.

The soft plasma arc combined laser-MIG composite welding device comprises a mounting plate, a soft plasma arc welding gun, a laser welding gun head and an MIG welding gun are sequentially mounted on the mounting plate, and the soft plasma arc welding gun and the MIG welding gun can be horizontally, vertically and rotationally adjusted on the mounting plate; the soft plasma arc welding gun forms an upper end shielding gas channel, the upper end of the upper end shielding gas channel is connected with a shielding gas pipe connector, a lower end shielding gas channel, an annular shielding gas cavity and a round hole are formed in the gas nozzle, and the round hole vertically penetrates through the interior of the annular shielding gas cavity to the exterior of the gas nozzle. Compared with the prior art, through the synergistic effect of the soft plasma arc welding gun, the laser welding gun head and the MIG welding gun, the welding penetration depth is increased, the welding speed is increased, the occurrence of welding defects is reduced, and the welding quality is improved. And the welding quality and the welding efficiency are improved.

This invention provides a follow-up clamping device for providing vortex gas to a laser welding head to protect the workpiece being welded. The follow-up clamping device includes: a clamping body having a conical inner cavity; a connecting member, one end of which is connected to the laser welding head; and an annular gas supply member, through which gas is introduced from the large opening side of the conical inner cavity, converges and forms a vortex-like converging airflow within the conical inner cavity, and is then ejected from the small opening side of the conical inner cavity, suitable for spraying towards the workpiece being welded. This invention solves the problems of unstable gas protection and the existence of protection dead zones in existing technologies, as well as the problem of severe plasma shielding effects affecting welding depth and energy transmission in existing technologies. It also solves the problem of existing laser welding clamping mechanisms obstructing airflow and causing protection blind zones.

The utility model provides a kind of exhaust pipe structure and rotatory compressor for rotatory compressor, comprising: exhaust pipe body, hole for connecting equalizing pipe is equipped on exhaust pipe body;Reinforcing structure, it is set on exhaust pipe body, reinforcing structure is used to increase the connecting length of hole and equalizing pipe.The utility model can increase the connecting length of exhaust pipe body and equalizing pipe, thereby increase the welding penetration of exhaust pipe body and equalizing pipe, guarantee welding quality, improve welding strength, thereby reduce the probability that the leakage at this welding place leads to compressor failure.

The invention discloses a titanium alloy welding material for welding and filling of a large-thickness component and a preparation method and application of the titanium alloy welding material, and belongs to the technical field of welding materials and preparation of the welding materials. The alloy elements and the content of the welding wire are reasonably adjusted, the sodium fluoride and the sodium fluoroaluminate are added into the metal powder to improve the surface tension of liquid molten drops and reduce the air hole forming tendency, meanwhile, the PTFE powder is added to improve the surface tension of the liquid molten drops, the deoxidizing and dehydrogenating effects are achieved, and the formability and the performance of a welding bead are improved; and the potassium sodium tartrate and the fluoride are combined to refine the weld structure, so that the problem that the edge is easy to crack and the like due to poor infiltration of the TC4 welding wire in the narrow-gap weld filling process is solved, and the large-thickness narrow-groove weld has better comprehensive performance.