4results about How to "Full inflow" patented technology

The utility model relates to the technical field of gas-fired boilers, in particular to a gas conveying device for boilers, which comprises a support frame, a return pipe, a gas conveying pipe group and a rotating structure, a right combustion chamber is fixedly connected inside the support frame, a cyclone separator is fixedly connected inside the support frame and positioned on one side of the combustion chamber, and a gas conveying pipe group is arranged inside the cyclone separator. The top of the combustion chamber is communicated with the cyclone separator through a pipeline, a backflow pipe is installed between the combustion chamber and the cyclone separator, one end of the backflow pipe is fixedly connected with the side wall of the combustion chamber, the other end of the backflow pipe is fixedly connected with the bottom of the cyclone separator, and the top of the cyclone separator is fixedly connected with an exhaust pipe. A fuel gas conveying pipe set used for conveying fuel gas and coal lock gas is installed at the bottom of the combustion chamber, a rotating structure used for mixing the fuel gas and the coal lock gas is installed in the combustion chamber, and the fuel gas conveying device for the boiler has the advantages of being efficient and accurate in fuel gas conveying and efficient and sufficient in fuel gas mixing.

This utility model discloses an underground pipeline repair device, including a remote-controlled vehicle that moves inside the pipeline and a storage tank for storing repair fluid. The remote-controlled vehicle is equipped with a leveling mechanism, which includes: a fixed frame with a main leveling roller mounted on it, the fixed frame being installed at the bottom of the remote-controlled vehicle; two auxiliary leveling rollers, each connected to the fixed frame via a drive assembly; and a power assembly connected to the two drive assemblies. This utility model has a simple structure. A single power assembly drives two drive assemblies to adjust their angles, thereby simultaneously adjusting the angles of the two auxiliary leveling rollers connected to the drive assemblies. This allows the main and auxiliary leveling rollers to better adapt to pipelines of different sizes. As the fit between the main and auxiliary leveling rollers and the bottom of the pipeline inner wall increases, the repair fluid can be leveled more effectively, allowing it to flow more fully into the pipeline gaps and improving the repair effect.

This disclosure provides a retaining ring and a polishing apparatus. The retaining ring includes an annular body having an inner peripheral wall, an outer peripheral wall, and a polishing surface connecting the top ends of the inner and outer peripheral walls. The annular body also has a plurality of spaced grooves recessed from the polishing surface, extending from the inner peripheral wall to the outer peripheral wall and communicating through it. The width between the two sidewalls of each groove is not entirely the same in a direction perpendicular to the bottom wall of the groove, and the sum of the widths between the bottom ends of the two sidewalls of all grooves is greater than or equal to the sum of the widths between the top ends of the two sidewalls of all grooves. The retaining ring of this disclosure can reduce polishing defects on the surface of semiconductor structures and improve the polishing rate.

The utility model provides a long -life high -performance screw tip tap has the coarse handle handle, thin neck and screw tip of coaxial connection as an organic whole, the chip flute made of screw tip is three groove structure, and the chip flute of three groove structure is three equal parts distribution relative to tap center axis, and the chip flute groove shape is two straight lines two circular arc form, and the smooth transition between circular arc, the screw tip still is made with straight flute, and the screw tip tap adopts the high -speed steel material of vacuum heat treatment, cryogenic treatment and passivation treatment to make. The utility model solves how to reach the technical problem of high -efficient tapping processing of high -performance screw tip tap product on numerical control equipment, improves tap life, processing high -efficient, quality is stable, long -lived, is fit for promotion.