10 results about "Large elbow" patented technology

The utility model discloses a special automatic welding machine for large elbows, which belongs to the technical field of special welding machines and comprises a base and a sliding groove, the sliding groove is embedded in the surface of the base, a sliding block is arranged in the sliding groove and slidably connected with the sliding groove, a fixing plate is arranged at the top of the sliding block, a mounting plate is arranged on one side of the fixing plate, and an adjusting groove is embedded in the surface of the mounting plate. Clamping plates are arranged in the adjusting groove, the clamping plates are in sliding connection with the adjusting groove, a first two-way threaded rod is arranged in the adjusting groove, the first two-way threaded rod is in threaded connection with the clamping plates, and an adjusting rod is arranged at one end of the first two-way threaded rod; by means of the sliding groove, the sliding block, the fixing plate, the mounting plate, the adjusting groove, the first two-way threaded rod, the adjusting rod and the clamping plate, an elbow is fixed, automatic adjustment is achieved according to the type of the elbow, use is more convenient, the clamping plate can be driven to push the elbow tightly only by rotating the adjusting rod, time and labor are saved, and the working efficiency is effectively improved.

The invention relates to an argon arc welding seam welding method for a lock bottom butt joint with a thermal barrier coating. The argon arc welding seam welding method comprises the following steps that S1, a welding seam joint is machined, specifically, a first groove is machined in a lock bottom at the mounting edge of the inner wall of a large bent pipe to be welded, a truncated edge is reserved, a second groove is machined in the mounting edge of the outer wall of the large bent pipe, and a truncated edge is reserved; the inner wall of the large elbow pipe and the outer wall of the large elbow pipe are combined, the lock bottom of the inner wall of the large elbow pipe is aligned with the mounting edge of the outer wall of the large elbow pipe, and the gap of the to-be-welded position is smaller than or equal to a first threshold value; s2, first-layer backing welding is carried out, during welding, welding wires are not filled, the truncated edge is directly penetrated in a penetration mode, and the step S3 is carried out after cooling; and S3, second-layer cosmetic welding is conducted, the first groove and the second groove are filled with welding wires, and then welding is conducted. According to the method, the welding quality can be guaranteed, heat input during welding can be obviously reduced, the coating is effectively prevented from falling off, and therefore the service life of the aero-engine large elbow is prolonged.

The utility model relates to the technical field of bent pipe welding auxiliary positioning tools, in particular to an adjustable positioning mechanism for a large bent pipe, which comprises an angle adjusting part, a hinged bracket part, a mounting bearing part and a clamping positioning assembly, the hinged bracket part is mounted on external transposition equipment; the whole hinging bracket part is of a U-shaped frame structure; the angle adjusting part is arranged on the outer side face of the hinged bracket part and connected with the hinged bracket part. A mounting bearing part which is adaptive to placement of the bent pipe is arranged in the hinged bracket part; in the specific use process, clamping positioning and angle adjusting can be conducted on the large elbow through the synergistic effect of the angle adjusting part, the hinge bracket part, the installation bearing part, the clamping positioning assembly and other components, and the auxiliary positioning requirement for the large elbow is met.

The utility model discloses a connecting structure of a three-bend forward-flushing spray pipe, which comprises a short joint, a double-end nut, a large bend, a small bend, a buckle nut and a punch, two ends of the large bend are provided with external threads II, and the short joint and the small bend are connected through the buckle nut; positioning groove structures are arranged in inner holes in the two ends of the large elbow, and plug structures matched with the positioning groove structures are arranged at the ends, facing the large elbow, of the short connector and the small elbow. According to the connecting structure of the three-bend front flushing spray pipe, an effective anti-loosening structure is adopted, and loosening of the punch can be prevented.

The utility model discloses a high-pressure-resistant stainless steel elbow, which relates to the technical field of stainless steel pipes, and comprises a large elbow, straight pipe transition parts are respectively arranged at two ends of the large elbow, and a flange joint is arranged at one end, far away from the large elbow, of each straight pipe transition part. Buffering pipe cores are embedded in the inner walls of the straight pipe transition part and the flange connector, the buffering pipe cores are connected to the two ends of the large elbow, the buffering pipe cores are provided with honeycomb holes, reducing pipe walls with the inner diameters gradually reduced and flow guide faces, the pipe inner diameter of the large elbow is larger than that of the buffering pipe cores, bosses are arranged at the two ends of the large elbow, and the bosses are connected with the buffering pipe cores. Reinforcing ribs connected along the outer wall of the large elbow are arranged between the end faces of the bosses at the two ends. According to the utility model, by arranging the large bending system, the buffering and shunting structure and the reinforcing structure, the impact pressure on the elbow at the turning part of the pipeline system is reduced.

A coiled pipe, a heat exchange core and evaporative cooling equipment are characterized in that the coiled pipe is formed by connecting a plurality of pipe units, each pipe unit is composed of a small elbow, a large elbow and two straight pipes, the width and height of each small elbow are smaller than those of each large elbow, and the straight pipes are connected between the small elbows and the large elbows and are tangent to the small elbows and the large elbows. According to the heat exchange core body, a plurality of coiled pipes are arranged in the heat exchange core body, and every two adjacent coiled pipes are arranged in a parallel and staggered mode; and in a projection plane parallel to the serpentine pipes, the projection area of the small elbow of one serpentine pipe is positioned in the projection area of the large elbow of the adjacent serpentine pipe. A large elbow is arranged at one end of the coiled pipe, and a small elbow is arranged at the other end. When the heat exchange core body is assembled, every two adjacent coiled pipes are arranged in a space staggered mode, the small elbow of one coiled pipe is located in the large elbow of the adjacent coiled pipe, and a certain gap is reserved between the small elbow and the large elbow. Therefore, when the coiled pipe is subjected to zinc immersion, an anti-corrosion blind area cannot occur, the outer surface of the coiled pipe can be completely covered with zinc liquid, a complete zinc coating is formed, and the phenomena of corrosion and perforation are prevented.

The invention discloses a connection structure between a large bend pipe of a reflow combustion chamber and a turbine and an aircraft engine, comprising a large bend pipe matching structure and a turbine guide assembly, the turbine guide assembly comprising a support assembly and a turbine guide, the end of the turbine guide facing the combustion chamber being a matching end for matching with the large bend pipe matching structure; the large bend pipe has an outer layer and an inner layer, the large bend pipe matching structure comprising a first annular connecting structure formed on the outer wall of the outlet end of the inner layer of the large bend pipe, the first connecting structure is axially arranged along one side of the turbine guide assembly and enclosed with the inner layer of the large bend pipe to form a first annular groove, the matching end of the turbine guide extends into the groove and abuts against the outer annular surface of the groove, and the matching end of the turbine guide has an axial spacing with the bottom of the groove and a radial spacing with the outer annular surface of the groove, so that the outlet end of the large bend pipe has a certain movable gap, ensuring that the large bend pipe has sufficient movable space to release stress after deformation, and also preventing the large bend pipe from being affected by the deformation of the diffuser.

The utility model relates to the technical field of polishing machines, in particular to a full-automatic bent pipe polishing machine which comprises a machine body and a cylinder, and the cylinder is rotationally installed on the inner side wall of the machine body. The circular track and the conducting ring are arranged on the outer side wall of the cylinder, the carbon brush is installed on the inner side wall of the machine body and makes friction contact with the conducting ring, the cylinder is provided with a plurality of sets of grinding mechanisms, and the grinding mechanisms are used for polishing the bent pipe. A driving device is arranged on the machine body and used for driving the cylinder to rotate, and a conveying device is arranged on the side portion of the machine body and used for automatically conveying the bent pipe. According to the elbow pipe polishing device, polishing machining in the elbow pipe moving and conveying process is achieved, the effect of polishing different positions of the surface of the elbow pipe under the condition that the elbow pipe does not rotate is achieved, the convenience of polishing treatment machining of the large elbow pipe is improved, and meanwhile the convenience of automatic conveying of the elbow pipe is improved.

The utility model discloses a quick change device of gasification burner, including burner body, burner mouth, big elbow, gland and small elbow, burner mouth is provided at the top of burner body, gland is provided at the top of burner mouth, big elbow is provided above burner mouth, and small elbow is provided above burner mouth. A first threaded hole is formed in the center of the interior of the large elbow, a machine head screw is arranged in the first threaded hole, the small elbow is arranged on one side of the large elbow, the small elbow is matched with the large elbow, and a locking part on the surface of the small elbow is tightly clamped with a clamping hook part at one end of the large elbow. According to the utility model, the operation steps of replacing the gasification burner are greatly simplified, the disassembly and assembly time is short, the efficiency is high, the burner replacement time can be shortened, the furnace temperature is prevented from decreasing too fast when the burner is replaced, and the labor cost can be saved to the greatest extent.

The application discloses a connecting structure of a large elbow pipe, which is applied to a backflow combustion chamber of an aero-engine and comprises a diffuser assembly and a large elbow pipe installed on an outer ring of a flame tube. The large elbow pipe comprises a front section and a rear section. The rear section comprises an inner wall and an outer wall. The end of the front section extends axially towards the combustion chamber side of the diffuser assembly and is provided with a first connecting structure. The end of the inner wall extends axially towards the combustion chamber side of the diffuser assembly and is provided with a second connecting structure for active sealing connection with the first connecting structure. The outer wall is movably inserted into the second connecting structure. The diffuser assembly is provided with a limiting structure for active limiting connection with the second connecting structure. The large elbow pipe is connected through axial lapping and radial sealing, which facilitates stress release of the large elbow pipe, reduces deformation of the large elbow pipe, prolongs the service life of the large elbow pipe, improves air tightness and enhances the cooling effect.