Automatic welding auxiliary device for connecting pipe flange of pressure vessel

Abstract

The utility model relates to the technical field of pressure vessel connecting pipe and flange welding, in particular to a pressure vessel connecting pipe and flange automatic welding auxiliary device which comprises a base, a main idler wheel, an auxiliary idler wheel and a driving device. The two support assemblies located on the front side of the upper portion of the base are movably connected with auxiliary rolling wheels, the two support assemblies located on the rear side of the upper portion of the base are movably connected with main rolling wheels, and a driving device is arranged on the left side of the base. The driving device comprises a motor, a speed reducer and a coupler; the pipe connecting flange is placed between the main roller and the auxiliary roller, the rotating main roller enables the pipe connecting flange to rotate under the friction force of the self weight, the rotating pipe connecting flange can drive the auxiliary roller to rotate, and therefore the pipe connecting flange can be rotated for welding, workers do not need to manually rotate the pipe connecting flange for welding, the welding difficulty is reduced, and the welding efficiency is improved. And the welding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding of pressure vessel nozzles and flanges, in particular to an automatic welding auxiliary device for pressure vessel nozzle flanges. Background Art

[0002] In the production and manufacturing process of pressure vessels, pressure vessel equipment is basically provided with nozzle flange assemblies for connecting equipment, pipelines, etc. Some of the nozzle flange assemblies of the equipment are large in size and specification, and it is difficult to weld after circumferential joint alignment; in the current production process, traditional methods are mostly used to strengthen the alignment and welding of nozzles and flanges, that is, the nozzle and flange are first aligned and then circumferentially welded. During the welding process, due to the structure and weight of the nozzle flange assembly with a larger nominal diameter, it is not easy to move and flip, which is not conducive to the use of automatic welding equipment. Manual horizontal welding in the vertical position of the workpiece or manual rotation of the workpiece for flat welding after being placed flat is mostly used. The labor intensity of manual welding workers is high, and the rotation speed is uneven. The weld quality is affected by many factors such as the experience of workers, and the production efficiency is low.

[0003] In recent years, with the rapid development of society, the requirements for the production cycle are getting higher and higher. The traditional process has been difficult to meet the needs of large-scale industrial production; combined with the actual situation, when welding the circumferential seam of the nozzle and flange, a tooling is designed to horizontally rotate the workpiece, that is, during the welding of the nozzle flange, the tooling rotates to drive the nozzle flange to rotate so that the weld seam is always in the horizontal position, realizing continuous welding of the circumferential seam of the nozzle and flange, which can improve the welding efficiency and welding quality. Therefore, it is particularly important to design and manufacture an auxiliary tooling that is simple and convenient to operate, has high efficiency and is adjustable.

[0004] The circumferential seam welding of the nozzle flange mainly refers to the circumferential seam welding of the nozzle and flange. In order to reduce the welding difficulty of welders, the circumferential seam welding generally adopts the method of horizontal rotation, that is, during the welding of the nozzle flange, the weld seam is always in the horizontal position by rotating the nozzle flange. The traditional process requires welders to operate manually, which increases the workload of welders and the rotation speed is uneven, resulting in low welding efficiency. Summary of the Utility Model

[0005] The utility model provides an automatic welding auxiliary device for pressure vessel nozzle flanges, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of large welding difficulty and low efficiency existing in the existing welding device for nozzle flanges that requires workers to manually rotate the nozzle flanges for welding.

[0006] To solve the above problems, an automatic welding auxiliary device for a pressure vessel nozzle flange according to the present utility model includes a base, main rollers, auxiliary rollers and a driving device. On both the left and right sides above the base, two bracket assemblies are movably connected at intervals in the front and rear directions. On the two bracket assemblies located at the front side above the base, auxiliary rollers are movably connected. On the two bracket assemblies located at the rear side above the base, main rollers are movably connected. A driving device is provided on the left side of the base; the driving device includes a motor, a reducer and a coupling. The output shaft of the motor is connected to the reducer through the coupling, and the output shaft of the reducer is connected to the main roller together.

[0007] The above base includes a "mouth"-shaped frame composed of four H-shaped steels. Among them, on the upper sides of the H-shaped steels on both sides, multiple groups of through holes are provided at intervals in the front and rear directions. Each group of through holes includes two arranged at intervals left and right.

[0008] The above bracket assembly includes a connecting bolt, a horizontal fixing plate and a vertical fixing plate vertically arranged in the middle above the horizontal fixing plate. Through holes that penetrate up and down and match the through holes at the corresponding positions are provided at the four corners of the horizontal fixing plate. The screw end of the connecting bolt passes through the through hole and the through hole at the corresponding position from bottom to top and is screwed with a nut.

[0009] On the upper left side of each of the above vertical fixing plates, a through hole that penetrates left and right is provided. A bearing is fixedly installed in the through hole. Both ends of the main roller and the auxiliary roller are fixedly connected to the inner ring of the bearing at the corresponding position together.

[0010] The above also includes a fixing seat. A fixing seat is provided on the left side of the base. The motor and the reducer are both fixed on the fixing seat.

[0011] In the present utility model, the nozzle flange is placed between the main roller and the auxiliary roller, and the outer surface of the nozzle is in contact with the main roller and the auxiliary roller, and the flange is suspended outside. The motor is started to drive the reducer to act, and further drive the main roller to rotate. The rotating main roller causes the nozzle flange to rotate under the friction of its own weight. The rotating nozzle can drive the auxiliary roller to rotate, so that the nozzle flange can be rotated for welding. It is not necessary for the staff to manually rotate the nozzle flange for welding, reducing the welding difficulty and improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following further details the specific embodiments of the present utility model in conjunction with the drawings.

[0013] Figure 1 It is a structural schematic diagram of the present utility model.

[0014] Figure 2 is Figure 1 exploded view of.

[0015] In the figure: 1 - base, 2 - main roller, 3 - auxiliary roller, 4 - electric motor, 5 - reducer, 6 - mounting hole, 7 - connecting bolt, 8 - horizontal fixing plate, 9 - vertical fixing plate, 10 - bearing, 11 - fixing seat, 12 - connecting pipe, 13 - flange. Specific embodiments

[0016] The present utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solution of the present utility model and the actual situation.

[0017] The present utility model will be further described below in conjunction with the embodiments and the drawings:

[0018] As Figure 1-2 shown, an automatic welding auxiliary device for a pressure vessel connecting pipe flange includes a base 1, a main roller 2, an auxiliary roller 3 and a driving device. On both the left and right sides above the base 1, two bracket assemblies are movably connected at intervals in the front and rear directions. An auxiliary roller 3 is movably connected to the two bracket assemblies located at the front side above the base 1, and a main roller 2 is movably connected to the two bracket assemblies located at the rear side above the base 1. A driving device is provided on the left side of the base 1; the driving device includes an electric motor 4, a reducer 5 and a coupling. The output shaft of the electric motor 4 is connected to the reducer 5 through the coupling, and the output shaft of the reducer 5 is connected to the main roller 2 together.

[0019] During operation, by placing the connecting pipe flange between the main roller 2 and the auxiliary roller 3, and bringing the outer surface of the connecting pipe 12 into contact with the main roller 2 and the auxiliary roller 3, the flange 13 is suspended outside. Start the electric motor 4 to drive the reducer 5 to act, and further drive the main roller 2 to rotate. The rotating main roller 2 causes the connecting pipe flange to rotate under the frictional force of its own weight. The rotating connecting pipe 12 can drive the auxiliary roller 3 to rotate, so that the connecting pipe flange can be rotated for welding, eliminating the need for workers to manually rotate the connecting pipe flange for welding, reducing the welding difficulty and improving the welding efficiency.

[0020] In summary, the present utility model drives the main roller 2 to rotate through the setting of the driving device, and further drives the connecting pipe flange to rotate, realizing the automatic rotary welding of the connecting pipe flange. When in use, advanced welding technologies and equipment can be adopted for automatic welding, ensuring the welding quality, reducing welding deformation, and having higher firmness and tightness at the welding points, avoiding the influence of human factors, and can continuously carry out welding operations, shortening the welding cycle of the connecting pipe flange and improving the production efficiency; in addition, automatic welding can eliminate the safety hazards brought by manual welding, such as soot, radiation, etc.

[0021] Among them, the automatic welding equipment can adopt safety measures such as automatic power on and off to ensure the safety of the welding process.

[0022] As Figure 1-2As shown, the base 1 includes a "mouth"-shaped frame composed of four H-shaped steels. Among them, on the upper sides of the H-shaped steels located on both sides, multiple groups of mounting holes 6 that penetrate up and down are provided at intervals before and after. Each group of mounting holes 6 includes two that are arranged at intervals left and right.

[0023] Therefore, by setting the base 1 to be composed of four H-shaped steels, it has the advantages of strong bending resistance, improved seismic performance, optimized space layout, simple construction, cost savings, and light structural weight.

[0024] As Figure 1-2 shown, the support assembly includes a connecting bolt 7, a horizontal fixing plate 8, and a vertical fixing plate 9 vertically arranged in the middle above the horizontal fixing plate 8. Through holes that penetrate up and down and match the mounting holes 6 at the corresponding positions are provided at the four corners of the horizontal fixing plate 8. The screw end of the connecting bolt 7 passes through the mounting hole 6 and the through hole at the corresponding position from bottom to top and is then screwed with a nut.

[0025] Therefore, during use, by connecting the main roller 2 and the auxiliary roller 3 to the support assembly at the corresponding positions, and by adjusting the front and rear positions of the horizontal fixing plate 8 on the base 1, the distance between the main roller 2 and the auxiliary roller 3 is adjusted to adapt to the welding of various specifications of connecting pipe flanges.

[0026] As Figure 1-2 shown, a through hole that penetrates left and right is provided on the upper left side of each vertical fixing plate 9. A bearing 10 is fixedly installed in the through hole. Both ends of the main roller and the auxiliary roller 3 are fixedly connected to the inner ring of the bearing 10 at the corresponding positions. Thus, it is convenient for the main roller and the auxiliary roller 3 to rotate on the support assembly.

[0027] As Figure 1-2 shown, it further includes a fixed seat 11. The fixed seat 11 is provided on the left side of the base 1. The motor 4 and the reducer 5 are both fixed on the fixed seat 11. Thus, it is convenient for the fixing and installation of the motor 4 and the reducer 5.

Claims

1. An automatic welding auxiliary device for a pressure vessel flange, characterized in that: It includes a base, a main roller, an auxiliary roller and a driving device. Two bracket assemblies are movably connected at a front-to-back interval on the left and right sides above the base. The two bracket assemblies located at the front side of the base are movably connected with the auxiliary rollers, and the two bracket assemblies located at the rear side of the base are movably connected with the main rollers. A driving device is provided on the left side of the base; the driving device includes an electric motor, a reducer and a coupling. The output shaft of the electric motor is connected to the reducer through a coupling, and the output shaft of the reducer is connected to the main roller.

2. The automatic welding auxiliary device for the flange of a pressure vessel according to claim 1 is characterized in that: The base includes a "mouth"-shaped frame composed of four H-shaped steels, wherein the upper sides of the H-shaped steels on both sides are provided with a plurality of groups of vertically penetrating mounting holes at intervals front and back, and each group of mounting holes includes two holes arranged at intervals left and right.

3. The automatic welding auxiliary device for the flange of a pressure vessel according to claim 2 is characterized in that: The bracket assembly includes connecting bolts, a horizontal fixing plate and a vertical fixing plate vertically arranged in the middle above the horizontal fixing plate. The four corners of the horizontal fixing plate are provided with through holes that pass through the top and bottom and match the mounting holes at the corresponding positions. The screw ends of the connecting bolts pass through the mounting holes and the through holes at the corresponding positions from bottom to top in sequence and are screwed with nuts.

4. The automatic welding auxiliary device for the flange of a pressure vessel according to claim 3 is characterized in that: A connecting hole is provided on the left side of the upper part of each vertical fixed plate, and a bearing is fixedly installed in the connecting hole. Both ends of the main roller and the auxiliary roller are fixedly connected to the inner ring of the bearing at the corresponding position.

5. The automatic welding auxiliary device for the flange of a pressure vessel according to claim 1, 2, 3 or 4, characterized in that: It also includes a fixing seat. The left side of the base is provided with a fixing seat, and the motor and the reducer are both fixed on the fixing seat.

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