32 results about "Large elbow" patented technology

The invention relates to a location device for large elbow and the processing method for the clipboard. The location device comprises bottom plate and several clipboards. Clipboards are fixed with the bottom plate. The clipboard comprises bottom part, left wing and right wing. The whole is in V-shape and the left wing is symmetric to the right wing. Circles set by any symmetric points on inner sides of two wings are coincidence with the cross section of large elbow which is set at two points. The machining method is that the clapboard is produced by adopting marking and cutting method on steel plate. The clipboard produced by the method has performances of automatic centering and automatic aligning welding line and makes the motion track of concave welding line of workpeice is changed into circle track. It solves difficult location problem in automatic welding for large elbow. The method provides a simple and easy production method for producing clipboards of location device for large elbow. The produced clipboard is provided with simple structure and low producing cost.

The invention relates to a location clipboard of automatic welding machine for large elbow, comprising bottom part, left wing and right wing. The whole is in V-shape and the left wing is symmetric to the right wing. Circles set by any symmetric points on inner sides of two wings are coincidence with the cross section of large elbow which is set at two points. It comprises small arc, tangential plane of two circles, big arc and retaining part. There is a concave groove at the lower of small arc. The machining method is that the clapboard is produced by adopting marking and cutting method on steel plate; the clipboard is fixed on the automatic welding machine for large elbow according to certain way to form the clipboard location device. The clipboard produced by the method has performances of automatic centering and automatic aligning welding line and makes arch-shape welding line of workpeice is changed into ring automatic welding line. It solves difficult location problem in automatic welding for large elbow. The method provides a simple and easy production method for producing clipboards. The produced clipboard is provided with simple structure and low producing cost.

The invention relates to a device for correcting the ovality of a port of a large elbow pipe fitting. The device comprises an ovality correcting body used for installing an ovality correcting part andis characterized in that a driving wheel and a driven wheel are arranged on the ovality correcting body, the driving wheel can move left and right relative to the driven wheel, the driving wheel andthe driven wheel can be coordinated with each other to clamp a port of an elbow so as to correct the ovality of the port, and a first driving motor for driving the driving wheel to rotate and a driving wheel translation driving mechanism for driving the driving wheel to move left and right are correspondingly arranged on the ovality correcting body.

The invention relates to a device for automatically welding a 90-degree large elbow. The device comprises a welding gun, a submerged arc welding trolley and winches and is characterized by also comprising an elbow turning rest, wherein struts are respectively arranged on the two sides of the elbow turning rest; pulleys are arranged at the tops of the struts; one sides of the two struts are respectively provided with one winch; an elbow is fixed on the elbow turning rest; the two ends of the elbow are respectively connected with the winches by virtue of steel wire ropes; one ends of the steel wire ropes are fixed on the winches and the other ends of the steel wire ropes are fixedly connected with the elbow by bypassing the pulleys; a rail is arranged on the welding line of the elbow; and the submerged arc welding trolley is put on the rail and is provided with the welding gun. The device runs stably and is high in welding efficiency; and the welding gun can be always vertical to the welding line so as to avoid reducing the welding line quality because a molten pool is affected by the gravity, thus obtaining the high-quality welding line.

An automatic welder for the longitudinal concave seam of a great elbow is composed of a power unit, a great elbow locating unit with several fastening plats fixed on smooth plate and having centering function, a welding head locating unit with synchronizing mechanism and supporting frame, and a brake unit.

The invention discloses a cooling structure for a recirculation combustion chamber, which comprises a flame tube outer ring, a flame tube inner ring, a large bend, a small bend and a flame tube head. One end of the flame tube outer ring is provided with a large bend, a large bend It is a ring structure, the other end of the flame tube outer ring is provided with a flame tube head, the inside of the flame tube outer ring is provided with a flame tube inner ring, and the end of the flame tube inner ring close to the large bend tube is provided with a small bend; the flame tube outer ring , which is provided with a plurality of outer ring mixing holes, and is divided into a plurality of first L-shaped unit bodies along the circumferential direction; the small elbow is in a ring structure, and is divided into a plurality of second L-shaped unit bodies along the circumferential direction . The invention belongs to the technical field of cooling, and the cooling efficiency of an L-shaped cooling elbow is higher than that of a conventional cooling elbow; the L-shaped cooling elbow is not easy to be ablated; the L-shaped cooling elbow can reduce the cost of sheet metal processing; The assembly of the segmental lap welded structure of the pipe is simple and easy to realize.

The invention discloses a specific assembling method of a tool for forming the large elbow. The tool comprises four H-shaped steel, wherein a plurality of steel plates are respectively connected onto each H-shaped steel, the number of the steel plates is determined according to elbow parameters including external diameter, bending angle and linear segment length which are required by elbow forming, a round hole is formed in each steel plate, the diameter of the round hole equals to the external diameter of the elbow to be installed and formed, the two ends of each H-shaped steel are respectively connected with a ring plate, and a backing ring is connected onto the external diameter of each ring plate; and a method for specifically installing the tool for forming the elbow comprises steps of horizontal reference plane determining, H-shaped steel 1 and H-shaped steel 2 installing, steel plate installing, H-shaped steel 3 and H-shaped steel 4 installing and backing ring installing. By the tool, the forming technical problem of large pipelines with cross sections which are formed by installing and welding steel pipes of a plurality round straight pipes, omega-shaped straight pipes, polygonal straight pipes and the like is solved, and the tool for forming the large elbow is simple in structure, is convenient to install, can be repeatedly used, has higher precision and can satisfy design requirements during the practical application.

The invention belongs to the technical field of mechanical processing, and in particular relates to a device for rounding the mouth of a large elbow. The device includes: a frame; The rotating shaft is connected to fix the elbow to be rounded; the equipment also includes: a rounding mechanism, which is arranged on both sides of the elbow, and is used to round the two sides of the elbow; a grinding mechanism, perpendicular to the elbow to be rounded A full-circle elbow is set; the first magnetic assembly is installed at the bottom of the grinding mechanism; the second magnetic assembly is connected in a closed circuit, and the second magnetic assembly is opposite to the first magnetic assembly and the two are opposite to each other The magnetism of the surface is the same; the flow blocking part is connected in the closed circuit and connected with the grinding mechanism; the elbow can be fixed by setting the clamping mechanism, and the elbow is driven by the driving part to rotate at the same time. The mechanism is convenient for limiting the travel of the elbow while it is rotating.

The invention discloses a large elbow structure of an axially floating type recirculation annular combustion chamber, which belongs to the field of aerodynamics, and specifically relates to the field of miniature recirculation annular combustion chambers, in order to solve the existing problem that the self-regulation cannot be realized according to different working conditions of the engine. The temperature defect of the inner wall of the large elbow includes a diffuser assembly, a flame tube assembly, and a turbine guide assembly. The diffuser assembly is provided with a plurality of elastic supports, and the gap between the elastic support and the flame tube assembly is A large curved pipe is provided, and the large curved pipe is fixed on the turbine guide assembly, and a cooling gap is formed between the large curved pipe and the flame tube assembly. The large elbow and the flame tube assembly are set separately, and at the same time, the elastic support is in surface contact with the large elbow, so that a cooling gap is formed between the large elbow and the flame tube assembly. The cooling air entering different gap values ​​is different, and the cooling effect is different. The effect of independently adjusting the temperature of the inner wall of the big bend is realized, and the service life of the big bend is increased at the same time.

The invention discloses an aluminum-plastic-coextrusion heat-conducting floor which comprises a floor body (1). The aluminum-plastic-coextrusion heat-conducting floor is characterized in that the floor body (1) comprises an aluminum core (11) and a wrapping layer (12) which wraps the outer surface of the aluminum core (11), a triangular hole (111) is formed in the aluminum core (11), two parallel rectangular holes (123) are formed in the core part of the wrapping layer (12), the left end of floor body (1) is provided with a large elbow (121) and a small groove (122), and the right end of the floor body (1) is provided with a large groove (124) and a small elbow (125). The aluminum-plastic-coextrusion heat-conducting floor is easy to splice, good in heat conducting performance, high in strength, environmental friendly, attractive, low in cost and long in service life.

The invention relates to a device for automatically welding a 90-degree large elbow. The device comprises a welding gun, a submerged arc welding trolley and winches and is characterized by also comprising an elbow turning rest, wherein struts are respectively arranged on the two sides of the elbow turning rest; pulleys are arranged at the tops of the struts; one sides of the two struts are respectively provided with one winch; an elbow is fixed on the elbow turning rest; the two ends of the elbow are respectively connected with the winches by virtue of steel wire ropes; one ends of the steel wire ropes are fixed on the winches and the other ends of the steel wire ropes are fixedly connected with the elbow by bypassing the pulleys; a rail is arranged on the welding line of the elbow; and the submerged arc welding trolley is put on the rail and is provided with the welding gun. The device runs stably and is high in welding efficiency; and the welding gun can be always vertical to the welding line so as to avoid reducing the welding line quality because a molten pool is affected by the gravity, thus obtaining the high-quality welding line.

The invention relates to the elbow preparation technical field, in particular to a preparation technology of forging elbow. The technology is characterized in that: (1) forging a pipe, namely a forging rod is fixed and forged into a forging pipe, and the eccentricity of the forging pipe is 4-6% of the wall thickness of a finished elbow; (2) bending, namely half-round thin pipe wall of the forgingpipe formed by eccentricity is made into the inner ring of an elbow while the half-round thick pipe wall is made into the outer ring of the elbow after the forging pipe is subject to heat treatment, thus the forging pipe is bent into the elbow. Compared with the prior art, the invention has simple technology, large elbow can be bent by adopting the technology, and the wall thickness of the inner ring and the out ring of the elbow can be ensured to be relatively uniform.

Automatic welding equipment for longitudinal arched seams of large elbows, including a power unit, a large elbow positioning device, a welding head positioning device and a brake device, wherein the large elbow positioning device includes several pieces fixed on the drum with automatic centering and welding. The clamping plate with seam centering function, the machine head positioning device for the longitudinal arch weld in the large elbow adopts a special machine head bracket, which can fix the machine head directly above the weld seam to ensure good welding quality. The device can immediately brake the entire welding equipment when the power is stopped or cut off, and continue welding from the power-off position after the power is turned on to ensure safe production. The automatic welding equipment for longitudinal arched seams of large elbows provided by the present invention cleverly changes the longitudinal arched welds of large elbows of workpieces into circumferential welds, breaking through the problem that the longitudinal arched welds of large elbows cannot be welded automatically.

The invention discloses a double-walled large elbow. The double-walled large elbow comprises an inner wall component and an outer wall component which are arranged inside and outside in sequence. The inlet ends of the inner wall assembly and the outer wall assembly are connected to form a supporting structure, which is used to support the diffuser in the axial direction, and then the inlet end of the double-walled large elbow is axially limited by the diffuser. , and at the same time make the inlet end of the double-walled large elbow have free thermal expansion along the radial direction. The supporting structure is also used to support the outlet of the flame tube, so that the outlet of the flame tube is sealed and connected with the double-walled large elbow, and at the same time, the outlet of the flame tube has free thermal expansion along the axial direction. The outlet ends of the outer wall assembly and the inner wall assembly are connected to form an open overlapping structure, so that the inner wall assembly has free thermal expansion in the axial and radial directions, and the extension portion of the outlet end of the outer wall assembly forms a fixed structure. The fixing structure is also used to support the guide so that the guide has free thermal expansion in the axial direction.