33results about How to "Move down" patented technology

The invention provides a special drill bit for reverse circulation drilling, which relates to the technical field of reverse circulation drilling tools, and solves the technical problems of the existing reverse circulation drilling drills, such as the length of diameter protection, easy blockage and poor rock-carrying ability, the special drill bit for reverse circulation drilling It includes a drill base (10), a piston jacket (12), a pressurized piston (13), and a pressurized connector (18). The drill base (10) is connected to the pressurized connector (18) through a flat key (20), A piston outer rectangular ring (11) is sealed between the piston outer casing (12) and the drill base body (10), and a piston rectangular ring gas ring one (14), The piston rectangular ring oil ring (15) and the piston rectangular ring gas ring two (16) are connected. The invention can realize strong shearing and rock breaking ability in the drilling process, long-lasting diameter protection, easy rock carrying, strong suction, anti-blocking, self-pressurizing function, and has the characteristics of efficient and stable operation in the reverse circulation drilling process.

The invention belongs to the technical field of equipment for grinding or polishing, and discloses a sleeve outer wall grinding device for an automobile. The sleeve outer wall grinding device comprises a base, and the base is internally provided with a first cavity and a second cavity. The first cavity is internally provided with a first piston, and a first push rod is disposed on the first piston; and a second piston is disposed in the second cavity, and a second push rod is connected between the first piston and the second piston. A dust collection opening and an air exhaust opening are formed in the upper surface of the base. An air outlet pipe and an air inlet pipe are disposed on the lower portion of the first cavity. The base is provided with annular moving grooves, and limiting blocks are disposed on the inner wall of the moving grooves. Annular supporting plates are disposed at the positions, located above the limiting blocks, in the moving grooves. Grinding cylinders are disposed on the supporting plates, and grinding brushes are disposed on the inner walls of the grinding cylinders. A grinding head and an air cylinder for driving the grinding head to move are arranged above the base. The sleeve outer wall grinding device for the automobile solves the problems that in the prior art, no contact between the grinding ring and the sleeve is achieved, and therefore, the grinding effect is poor since debris generated by a grinding sleeve is difficult to discharge and accumulated between a grinding ring and the sleeve.

The invention belongs to the technical field of part processing equipment for objects of underground structures and discloses a part processing device for pipeline anti-freezing equipment. The part processing device comprises an upper die and a lower die. A cavity is formed in the lower die, a pressing block is arranged on the upper die, and spheres are arranged on both sides of the cavity. A support roller is arranged at the bottom of the cavity and comprises outer cylinders and inner cylinders. Air inlets are correspondingly formed in the outer cylinders. Through holes are correspondingly formed in the inner cylinders. Heating coils are arranged in the inner cylinders. The part processing device further comprises an air inlet mechanism. The air inlet mechanism comprises a first support rod, a second support, a third support rod, a piston cylinder and a sliding plate. An air suction port and exhaust ports are formed in the piston cylinder, and air ducts are correspondingly connected between the exhaust ports and the inner cylinders. A gas outlet is formed in the lower part of the lower die, and a pressure relief valve is arranged in the air outlet. The part processing device further comprises a driving mechanism for driving the inner cylinders to rotate. According to the part processing device, the problems that the heating of a block-shaped heating layer in the prior art is local heating, consequently only the local part of the heating layer has the good deformation effect, and breakage of unheated parts or generation of edges and corners are easily caused is solved.

The invention discloses a reverse pressing system of a nail shooting pill. The reverse pressing system of the nail shooting pill comprises a press machine, wherein a floating pressing mechanism is arranged on a working table of the press machine, the floating pressing mechanism comprises a floating supporting plate and a plurality of counter-pressure punches extending vertically, clearance holes which allow the counter-pressure punches to penetrate through are formed in the middle of the floating supporting plate, two pad strips are arranged above the floating supporting plate, and the upper end surface of each counter-pressure punch is lower than the upper surface of each pad strip; and a press head of the press machine is connected with a horizontal upper pressing board, the horizontal upper pressing board is located above the floating pressing mechanism, and the horizontal upper pressing board is provided with space holes which are in one-to-one correspondence to nail shooting pillmounting holes in a nail shooting pill loading plate. In the pressing process, direct contact with the nail shooting pill is avoided, the counter-pressure punches are used for abutting against a cartridge case, and the cartridge case is always in a static state, so that the cartridge case can be accurately in butt joint with a containing cavity of the nail shooting pill; and the nail shooting pillloading plate and a cartridge case loading plate subjected to pressing can return in time, so that the next pressing is facilitated, and the production efficiency is improved.